CN101267664B - A resource allocation, transmission method and device for reference signals - Google Patents
A resource allocation, transmission method and device for reference signals Download PDFInfo
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- CN101267664B CN101267664B CN2007100892070A CN200710089207A CN101267664B CN 101267664 B CN101267664 B CN 101267664B CN 2007100892070 A CN2007100892070 A CN 2007100892070A CN 200710089207 A CN200710089207 A CN 200710089207A CN 101267664 B CN101267664 B CN 101267664B
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Abstract
The invention discloses a resource distribution method of reference signals, comprising distributing a code channel for the reference signal in a basic frequency hopping bandwidth; and distributing different frequency hopping bandwidths for reference signals in at least two code channels. The invention also discloses a resource distribution device of reference signals, a transmitting method and device of reference signals. With the invention, reference signals with different bandwidths can exist simultaneously, different request of users for the bandwidth can be satisfied. The method can support that a plurality of users simultaneously perform quality measurement of channels with different bandwidths when the method is used for channel quality measurement, thereby increasing flexibility of the system; at the same time, sequences used by the code channels adopt the sequences with the CAZAC characteristic, channel estimation performance is improved, in addition, with the invention according to the invention, the system avoids generation of sequences with different lengths, thereby avoiding interference between short and long sequences in surrounding cells and reducing the complexity of sequence design.
Description
Technical field
The present invention relates to wireless communication technology, be specifically related to a kind of resource allocation and launching technique and device of reference signal.
Background technology
In the wireless communication system of a multi-user (terminal) communication; The wireless channel path of each user's transmission is different; The channel fading of experience is also different separately, makes the active user on some transmission band, have better transmission performance, and on some frequency band the deep fading.System can utilize the otherness of transmitting between the different user fully for raising capacity and throughput, is commonly referred to multi-user diversity.System can utilize the difference of user's transmission channel at aspects such as time and frequencies; Through the rational and effective dispatching algorithm; For different users disposes different time and band resource, make each user in transmission performance separately optimum the or more excellent enterprising data transfer of Radio Resource.For this reason, in the up link of user and base station communication, in order to make full use of multi-user diversity, the channel quality information that inserts the user need be known in the base station, thereby for the user carries out efficient resource allocation, reaches the maximization of system gain.
In a system that the user is carried out frequency domain dispatching, the base station is according to the decline state of different user on different frequency bands.In order to make the base station obtain the channel information of user on different frequency bands, this user need send a signal by certain sequence modulation to the base station, and the radio band of this signal experience broad can be described as reference signal usually, also is pilot signal; Known this sequence in base station is so behind this signal that receives user's transmission, through comparing and treating with former transmission sequence, just channel estimating just can obtain the decline that the user experiences on the broad frequency domain channel.That is to say that user's pilot signal transmitted makes the base station receiving terminal can pass through channel estimating, obtains the quality of this user's wireless transmission channel.In the reality, this pilot signal can be the common pilot signal of sending for data demodulates, and the double usefulness of doing channel measurement also can be the measurement pilot frequency that is specifically designed to channel quality measurement.
When system carry out be frequency domain dispatching the time, measurement pilot frequency need provide channel measurement on the broad frequency band beyond doubt, otherwise just can't obtain the multi-user diversity gain of sufficient frequency domain dispatching.For the bandwidth of concrete measurement pilot frequency, consider many factors: because far and near different apart from the base station, the residing geographical position of user, and user's bandwidth of launching pilot signal receives the restriction of its transmitting power; Simultaneously, because the user is also different to the demand of transmission bandwidth, so need there be the pilot signal of multiple measurement bandwidth in the system.In addition; Though it is best to scheduling performance that all users provide the channel quality measurement in the full scheduling bandwidth; But the scheduling bandwidth of system also is limited usually; In order to support more user to measure simultaneously, be necessary to limit certain user's measurement bandwidth, so system just can provide different measurement bandwidth.
When having had the measurement pilot frequency of various bandwidth in the system, just need a kind of effective method to come multiplexing these signals.
Traditional code division multiplexing method, as (PN, the method for Orthogonal Frequency Division Multiplexing PseudoNoise) can only be with the signal multiplexing of same band together to utilize Walsh (Walsh) and pseudo random sequence.For example, be benchmark with some frequency hoppings unit, different user in this basic frequency hopping unit, carries out frequency hopping with different code sequence multiplexings in time, the channel quality measurement in accomplishing the total system scheduling bandwidth.Have only a kind of measurement bandwidth in this system, that is exactly full scheduling bandwidth, and the measurement that all users accomplish in the total system scheduling bandwidth needs the identical time interval.
Obviously; System does not support the pilot signal of multiple measurement bandwidth and deposits in this scheme; Can not satisfy the different demands of different user to bandwidth flexibly, it is dumb that simultaneity factor shows slightly: otherwise the number of supporting tails off, otherwise certain user's measurement performance is affected.
In addition, because the transmitted waveform of use PN sequence does not possess the characteristic of permanent amplitude, to having relatively high expectations of transmitting terminal power amplifier; Simultaneously, because the amplitude of PN sequence on frequency domain is different, when the base station receiving terminal carries out channel estimating, unavoidably can be smaller because of signal amplitude on individual subcarriers, and influence the overall channel estimation performance.
The method of the measurement pilot frequency of other multiplexing various bandwidth has in addition, and time-division, frequency division and mixing divide multiplexing; But some problems are arranged all separately; For example; The method of the pectination frequency division multiplexing that in single carrier-frequency division multiple access system (SC-FDMA, SingleCarrier-frequency Division Multiple Access) system, adopts.
Before the principle of explaining the pectination frequency-division multiplexing method, normal amplitude zero auto-correlation (CAZAC, constant amplitude zero auto-correlate) sequence is described at first.
The CAZAC sequence has normal amplitude zero autocorrelation performance, and its concrete characteristic is: the mould of amplitude is a constant value, for example, can be normalized to 1; Null cycle autocorrelation performance, except with self correlation maximum, the auto-correlation of this sequence self and other cyclically shifted sequences is zero.Because the above characteristic of this sequence makes that this sequence also is the CAZAC sequence in the sequence of frequency domain, has identical characteristic through behind the Fourier transform, promptly normal amplitude and zero autocorrelation performance.
The CAZAC sequence has a variety of producing methods, comprises pricking doffer-first (Zadoff-Chu), thorough spectral sequence of broad sense class (GCL, Generalized Chirplike Sequence) and Milewski sequence etc.With the Zadoff-Chu sequence is example, and its generating mode is following:
Wherein, r is the number relatively prime with N, and q is an integer arbitrarily.When getting different r values, obtain different sequences, r is the parameter that sequence generates, and also can be called the numbering or the index of the sequence of generation.The cyclic shift that different q is corresponding different.
By and large; The sequence that the different cyclic shifts of a CAZAC sequence generate is called the cyclically shifted sequences that is generated by same basic sequence; This cyclically shifted sequences and self still have the good period autocorrelation, and still keep low cross correlation with the basic sequence of former sequence, other equal length and the cycle shift sequence of other equal length.The cycle shift here is meant: length is expressed as (c for the basic sequence of N
0, c
1, c
2..., c
N-1), its displacement is shown (c for the cycle shift sequence table of m
N-m, c
N-m+1..., c
N-1, c
0, c
1..., c
N-m-1).
For by two different sequences that the r value obtains, r=u for example, r=v, when u-v and N were relatively prime, the cross-correlation of these two sequences was very little, promptly has good cross correlation.Especially, when being a prime number for N itself, r=1; 2 ..., N-1; Generated N-1 different CAZAC sequence, be called basic sequence, and the cross correlation between these CAZAC sequences has been fine; Example for example, when N was prime number, the absolute value of cross-correlation was
.
So-called pectination frequency division is divided into the subcarrier system of several " pectinations " with all subcarriers according to the method for extracted at equal intervals exactly, and different " combs " gone up the signal that carries different bandwidth, signal that can the code division multiplexing same band on each " comb ".Fig. 1 is existing pectination frequency-division multiplexing method sketch map; Referring to Fig. 1, different broach are represented different subcarriers, the 1st, carry to measure bandwidth be the measurement pilot frequency of B1 to the 4...22 subcarrier; 2nd, 5...23 subcarrier carrying measurement bandwidth is the measurement pilot frequency of B2; 3rd, 6...24 subcarrier carrying measurement bandwidth is the measurement pilot frequency of B3, by knowing B1=2 * B2=4 * B3 among the figure.Therefore; At same pilot tone delivery time; Different user can be launched the signal of different bandwidth; Method for example shown in Figure 1 can support a user to carry out that channel quality measurement that bandwidth is B1, two users carry out the channel quality measurement that bandwidth is B2, four users carry out the channel quality measurement that bandwidth is B3 simultaneously.
The pilot signal of every kind of bandwidth is only sent on some subcarrier in this method, when adopting the CAZAC sequence, and Zadoff-Chu sequence etc. for example, during as pilot frequency sequence, the sequence length of use is also corresponding to diminish.When being B1 like signal bandwidth, pilot signals carry is launched on 8 number of sub-carrier, and then used sequence length is about 8; Therefore, signal bandwidth is more little, and the length of used sequence is just more little, and when being B3 as measuring bandwidth, pilot signal just only is carried on 2 number of sub-carrier launches, and corresponding use sequence length is about 2.Characteristic by the CAZAC sequence can know that the number of CAZAC sequence receives the influence of its length, when length hour, its number is also just few more.When a plurality of sub-districts used identical frequency resource to launch pilot signal, for fear of the phase mutual interference, different basic sequences need be used in each sub-district.But sequence shortens and can the Sequence Planning of whole system be impacted, and does not promptly have enough basic sequences can give sub-district on every side and uses.In addition; The frequency of utilization resource is more independent separately owing to peripheral cell; As on some identical subcarrier, having sent the signal of different bandwidth separately, i.e. situation about disturbing then can appear taking place between the sequence of different length in the sequence of different length; Avoid or reduce interference, will increase the complexity of systems organization.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of resource allocation methods of reference signal, and the reference signal of support various bandwidth is also deposited.
The embodiment of the invention provides a kind of resource allocation device of reference signal, and the reference signal of support various bandwidth is also deposited.
The embodiment of the invention provides a kind of launching technique of reference signal, and the reference signal of support various bandwidth is also deposited.
The embodiment of the invention provides a kind of emitter of reference signal, and the reference signal of support various bandwidth is also deposited.
For achieving the above object, the technical scheme of the embodiment of the invention is achieved in that
A kind of resource allocation methods of reference signal comprises: in basic frequency hopping bandwidth, distribute code channel for reference signal; And be the different frequency hopping bandwidth of reference signal distribution of at least two code channels.
A kind of launching technique of reference signal comprises the sign indicating number sequence of confirming that reference signal is used in basic frequency hopping bandwidth; And in the frequency hopping bandwidth of distributing, carry out the frequency hopping transmitted reference signal, said frequency hopping bandwidth is that network side is distributed at least two different frequency hopping bandwidth of different reference signals.
A kind of resource allocation device of reference signal comprises code channel distribution module and frequency hopping bandwidth allocation module,
Said code channel distribution module is used in basic frequency hopping bandwidth, distributing code channel for reference signal;
Said frequency hopping bandwidth allocation module, the reference signal that is used at least two said distribution code channels is distributed different frequency hopping bandwidth.
A kind of emitter of reference signal comprises yard a sequence determination module and a transmitter module,
Said sign indicating number sequence determination module is used for the sign indicating number sequence of confirming that reference signal is used in basic frequency hopping bandwidth;
Said transmitter unit is used for taking place frequently at the frequency hopping bandwidth introskip that distributes and penetrates reference signal, and said frequency hopping bandwidth is that network side is distributed at least two different frequency hopping bandwidth of different reference signals.
Compared with prior art; The technical scheme that the embodiment of the invention provided; Through in basic frequency hopping bandwidth, distributing different code channels, and be the different frequency hopping bandwidth of reference signal distribution of at least two code channels, make reference signal frequency hopping in different frequency band ranges of different user for reference signal; Thereby satisfied the different demands of different user, strengthened the flexibility of system bandwidth.When being used for channel quality measurement, can supporting the multi-user to carry out the channel quality measurement of different bandwidth, thereby improve the flexibility of system.
Description of drawings
Fig. 1 is existing pectination frequency-division multiplexing method sketch map;
Fig. 2 is the resource allocation methods flow chart of reference signal in the embodiment of the invention;
Fig. 3 is the resource allocation methods sketch map of reference signal in the embodiment of the present invention one;
Fig. 4 is the resource allocation methods sketch map of reference signal in the embodiment of the present invention two.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is elaborated.
The resource allocation methods of the reference signal that the embodiment of the invention provides is: in basic frequency hopping bandwidth, distribute code channel for reference signal; And be the different frequency hopping bandwidth of reference signal distribution of at least two code channels.Wherein, this reference signal is also referred to as pilot signal, and sign indicating number sequence that code channel uses can be PN sequence, Walsh sign indicating number or CAZAC sequence etc.Basic frequency hopping bandwidth is meant the band width in physical of reference signal, also is the fundamental frequency unit that reference signal is carried out the frequency hopping emission; The frequency hopping bandwidth is meant this reference signal bandwidth that frequency hopping experienced or covered within a certain period of time.
Execution mode one
Be example to adopt the CAZAC sequence as pilot frequency sequence in the preferred embodiment provided by the invention, the resource allocation methods of a kind of reference signal that the embodiment of the invention is provided is elaborated.The CAZAC sequence has the shift-orthogonal characteristic.For example; Different shift sequences when different user or different transmit antennas employing same base sequence; This sequence of emission on time domain when satisfying the length of displacement greater than the maximum multipath time delay of multipath channel (or gross energy is time delay of 90% maximum diameter or the like) simultaneously, is exactly quadrature between the signal of different transmitting sequences; The base station receiving terminal utilizes the correlation of sequence just can eliminate the interference of other user or other antenna, thereby can obtain channel estimation results comparatively accurately.
On the other hand, the CAZAC sequence has normal amplitude characteristic.Concrete; User's pilot transmitted signal amplitude on each subcarrier of frequency domain equates that therefore, receiver can compare the fair channel fading on each subcarrier that estimates; And can be not smaller because of signal amplitude on individual subcarriers, influence the overall channel estimation performance.Simultaneously, because the CAZAC sequence also is normal amplitude on time domain, therefore, the waveform peak-to-average force ratio on time domain is little, is easy to the transmitter emission.
When pilot signal was used for channel quality measurement, this pilot signal was called measurement pilot frequency, and basic frequency hopping bandwidth just is called the fundamental measurement bandwidth, and the frequency hopping bandwidth of distribution is called the measurement bandwidth.The fundamental measurement bandwidth covers the measurement bandwidth of being distributed through the emission of frequency hopping in a plurality of pilot tone delivery times, measures thereby accomplish.
Below be example with the pilot signal that is used for channel quality measurement, Fig. 2 is the resource allocation methods flow chart of the reference signal in the embodiment of the invention, and is as shown in Figure 2, this method may further comprise the steps:
Step 201: in the fundamental measurement bandwidth, distribute code channel for measurement pilot frequency.
Step 202: for the measurement pilot frequency of at least two code channels is distributed different measurement bandwidth.
Above-mentioned steps does not have order successively, can successively carry out simultaneously yet.
Introduce step 201 below in detail, in the fundamental measurement bandwidth, be specially for measurement pilot frequency assigned code road:
Bandwidth is measured according to each user's demand assignment in the base station, and utilizes the allocation of pilots code channel of the CAZAC sequence of different shift-orthogonal for the different measuring bandwidth.For example; With a plurality of code channels of the corresponding one-tenth of different orthogonal sequences, number respectively, for example; What the CAZAC sequence adopted is the Zadoff-Chu sequence; Code channel 0 can be the former Zadoff-Chu sequence of not doing any displacement, code channel 1 is that former Zadoff-Chu sequence has been carried out length is the sequence that obtains after 3 the cycle shift, and code channel 2 is that former Zadoff-Chu sequence has been carried out length is the sequence that 6 cycle shift obtains.Employed shift sequence is as long as guarantee the maximum multipath time delay of the length of cycle shift greater than multipath channel.The user is according to the measurement bandwidth of distributing, and knows corresponding code channel, just can carry out pilot signal and send.
After the above-mentioned code channel numbering, carry out the distribution of yard Taoist monastic name, specifically dual mode can be arranged:
A kind of mode is to carry out corresponding with the relation of code channel with certain preassigned pattern different bandwidth; As, system default measurement bandwidth is that the pilot signal of B takies code channel 0, the measurement bandwidth is that the pilot signal of 2B takies code channel 1; The measurement bandwidth is that the pilot signal of 3B takies code channel 2, or the like.So when base station assigns was measured bandwidth B to a user, the user just knew and should on code channel 0, transmit.
Another kind of mode is by the explicit sign indicating number Taoist monastic name of notifying each to measure the bandwidth use in base station.When carrying out resource allocation, distributed code channel 0 simultaneously, for the user who measures bandwidth 2B distributes code channel 1, for the user who measures bandwidth 4B distributes code channel 2 like user for the measurement bandwidth B.
Introduce step 202 below in detail, distribute different measurement bandwidth for the measurement pilot frequency of at least two code channels and be specially:
Fig. 3 is the resource allocation methods sketch map of reference signal in the embodiment of the present invention one; As shown in Figure 3, the fundamental measurement bandwidth is B, and the size of this fundamental measurement bandwidth can be that system is provided with in advance or gives tacit consent to; For example can be 1.25MHz, also can be that the base station is dynamically adjusted according to demand.The reference signal that among Fig. 3 is three code channels has altogether distributed three kinds to measure bandwidth, is respectively bandwidth B, 2B and 4B.The user who has wherein distributed the fundamental measurement bandwidth B only measures the channel quality in its fundamental measurement bandwidth; Distributed and measured bandwidth and then accomplish it greater than the user of B and measure the channel quality measurement in bandwidth through frequency hopping repeatedly.The mode that the pilot signal of different measuring bandwidth is then divided through sign indicating number in the fundamental measurement bandwidth is carried out multiplexing.Here the sign indicating number branch mode that particularly points out is to utilize the shift-orthogonal characteristic of CAZAC sequence to realize.Referring to Fig. 3, the T0 shown in the figure, T1, T2 and T3 are four pilot tone delivery times.
For example, be that the measurement bandwidth that 4 users distribute all is B, and all distributed code channel 0.User's 1 wherein resource is the T0 moment, and frequency band range is F3-F4; User 2 resource is the T1 moment, and frequency band range is F2-F3; And user 3 resource is at T2 constantly, and frequency band range is F1-F2, and user 4 resource is the T3 moment, and frequency band range is F0-F1.And concerning measuring the user that bandwidth is 2B, the resource of distribution is the T0 moment, and frequency band range is F3-F4, and in the T1 moment, frequency band range is F2-F3; Like this, through twice frequency hopping, this user is that the measurement bandwidth measurement of 2B has finished with bandwidth just.The measurement bandwidth of 2B needs twice frequency hopping to accomplish measurement, and the measurement bandwidth of 4B needs four frequency hoppings could accomplish channel quality measurement.
Give the total resources of measurement pilot frequency for system assignment; It can be the running time-frequency resource that in Fig. 3, indicates with shade; That is to say that each resource of having only a fundamental measurement bandwidth constantly can use, can give four to carry out user that bandwidth is the channel quality measurement of B, two to carry out bandwidth be that user and of the channel quality measurement of 2B carries out the user that bandwidth is the channel quality measurement of 4B the resource allocation in the time period of T0～T4 like this.Certainly,, can carry out resource allocation as stated above equally on these resources so, make the pilot signal ability of different measuring bandwidth together multiplexing if system has also distributed to measurement pilot frequency with other running time-frequency resource among Fig. 3; Because resource increases, the simultaneously-measured number of users that can support is just more simultaneously.At this moment; Also because the increase of stock number; Also need more indication when system is user resource allocation,, that is to say it is that which pilot tone delivery time is the pilot signal of B will send at that certain user measures bandwidth on which frequency band like skew of resource time corresponding and frequency shift (FS).
Execution mode two
In another embodiment, key step is identical with last execution mode, step 301: in the fundamental measurement bandwidth, distribute code channel for measurement pilot frequency; Step 302: for the measurement pilot frequency of at least two code channels is distributed different measurement bandwidth.
Different with aforementioned embodiments is: the hop period of the measurement pilot frequency of said different measuring bandwidth can be inequality.Hop period is meant the time interval of this signal integrity frequency hopping, and this hop period is all related with measurement bandwidth and fundamental measurement bandwidth usually, also just says, hop period is different, and it is also different to measure bandwidth.With reference to figure 3, measuring bandwidth is the signal of 4B, and its hop period is that 4 pilot signals are sent at interval, is the signal of B and measure bandwidth, and its hop period is exactly that 1 pilot signal is sent at interval.Simultaneously, the signal of different measuring bandwidth also has a transmit cycle, and transmit cycle is meant in certain time quantum, the number of times of the signal of emission, and transmit cycle can be according to demand restriction or configuration separately.As, in the time period of T0～T4 shown in Figure 3, every kind of user who measures bandwidth, the transmit cycle of its signal all is 1, promptly every kind of signal of measuring the user of bandwidth is only launched once.
With reference to figure 4, can also the setting measurement bandwidth be that the user's 1 of B the transmit cycle of pilot signal is 4, at subsequently 4 pilot tone delivery times, user 1 will continue to send measurement pilot frequency, can improve the receptivity of the measurement pilot frequency of user's 1 emission so like this.
In the practical application, for above each execution mode, running time-frequency resource and sign indicating number Taoist monastic name can be distributed for each user more flexibly in the base station.When being the allocation of pilots bandwidth, can distribute the arbitrary integer measurement bandwidth doubly of fundamental measurement bandwidth in theory.The kind of the measurement bandwidth that system supports is many more, and system is flexible more, but divides the timing need be also just big more by the signaling consumption of base station or network side notice, and therefore, system need compromise according to the demand of reality.
Execution mode three
In another embodiment, key step is identical with last execution mode, step 401: in the fundamental measurement bandwidth, distribute code channel for measurement pilot frequency; Step 402: for the measurement pilot frequency of at least two code channels is distributed different measurement bandwidth.
Different with aforementioned embodiments is: be the sign indicating number Taoist monastic name that each reference signal is distributed, can be described like above execution mode, and the fixing code channel of reference signal in this execution mode, also can distribute at the different code channel of different moment conversion.At this moment, otherwise by the base station notify the current use of user the sign indicating number Taoist monastic name; Perhaps the user changes the sign indicating number Taoist monastic name according to the pattern that is provided with in advance, for example carries out the saltus step of yard Taoist monastic name according to a pseudorandom mode.As beginning to sign indicating number Taoist monastic name 7, whenever carry out channel quality measurement and change once sign indicating number Taoist monastic name etc. for 2 times from sign indicating number Taoist monastic name 0.
In the resource allocation methods of aforementioned each reference signal, base station or network side are the resource that different users has distributed measurement pilot frequency, also can be to distribute for same user's different transmit antennas in the reality.
Execution mode four
Execution mode of the present invention also provides a kind of launching technique of reference signal, and this method may further comprise the steps:
Step 501: confirm the sign indicating number sequence that reference signal is used in basic frequency hopping bandwidth;
Step 502: in the frequency hopping bandwidth of distributing, carry out the frequency hopping transmitted reference signal, this frequency hopping bandwidth is that network side is distributed at least two different frequency hopping bandwidth of different reference signals.
The sign indicating number sequence that this reference signal is used is normal amplitude zero an auto-correlation CAZAC sequence.
The CAZAC sequence is Zadoff-Chu basic sequence and/or its cycle shift sequence.
The reference signal transmit cycle is configurable for different.For example shown in Figure 4, the transmit cycle of pilot signal of measuring bandwidth and be the user 1 of B is 4, and at subsequently 4 pilot tone delivery times, user 1 will continue to send measurement pilot frequency, can improve the receptivity of the measurement pilot frequency of user's 1 emission so like this.If this user's transmit cycle is 2, then at subsequently two pilot tone delivery times, this user continues to send measurement pilot frequency.
In the practical application; This method is when being used for channel quality measurement; Measure the user of bandwidth greater than the fundamental measurement bandwidth; Can carry out frequency hopping according to the frequency hopping pattern that is provided with in advance and measure, this frequency hopping pattern can be that the sub-district is specific, a pseudorandom frequency hopping pattern that promptly obtains according to the sign characteristic informations such as (ID) of sub-district; It also can be exactly the increasing or decreasing that simply carries out the frequency band position according to the time.The most simply be exactly measurement bandwidth as shown in Figure 3 be the user of 4B, carry out frequency hopping by the order of frequency band, successively in F3～F4, F2～F3, F1～F2, the last emission measurement pilot tone of F0～F1.
In the actual measurement process, consider the coherence bandwidth of channel, also can on the partial-band of measuring bandwidth, carry out Resources allocation for measurement pilot frequency, the user only carries out the frequency hopping emission on this partial-band when the emission measurement pilot tone.This moment, default less fundamental measurement bandwidth was represented the channel quality of a bigger bandwidth with this less fundamental measurement bandwidth.Therefore; The user is when measuring more wide band channel; Can only survey the partial-band in this frequency band, need not travel through and measure all frequency bands, just can obtain the channel quality information of this user in the measurement bandwidth of distributing; The resource of so just can saving time has also allowed more users to measure simultaneously.
Execution mode five
The embodiment of the invention also provides a kind of resource allocation device of reference signal, comprises code channel distribution module and frequency hopping bandwidth allocation module.
Wherein, the code channel distribution module is used in basic frequency hopping bandwidth, distributing code channel for reference signal;
The frequency hopping bandwidth allocation module is used at least two and distributes the reference signal of code channel to distribute different frequency hopping bandwidth.
Execution mode six
The embodiment of the invention also provides a kind of emitter of reference signal, comprises yard a sequence determination module and a transmitter module.
Wherein, sign indicating number sequence determination module is used for the sign indicating number sequence of confirming that reference signal is used in basic frequency hopping bandwidth;
Transmitter module is used for taking place frequently at the frequency hopping bandwidth introskip that distributes and penetrates reference signal, and this frequency hopping bandwidth is that network side is distributed at least two different frequency hopping bandwidth of different reference signals.
This emitter can be arranged on user terminal.
Can be found out that by the above the technical scheme that the embodiment of the invention provides is distributed the multiplexing code channel in correspondence of reference signal of bandwidth with difference, the reference signal of support various bandwidth is also deposited.
The technical scheme that the embodiment of the invention provides when being used for channel quality measurement, supports each user to carry out the channel quality measurement of different bandwidth, and the just not simple channel quality measurement of scheduling bandwidth entirely; And with the pilot signal code division multiplexing of different bandwidth, thereby support that the multi-user carries out channel quality measurement simultaneously, strengthened the flexibility of system.
In the technical scheme that the embodiment of the invention provided; Because the reference signal code division multiplexing is in identical fundamental measurement bandwidth, thereby employed sequence length all is identical, therefore; Both made is under the environment of cellular cell; Peripheral cell does not have the sequence of other length to occur yet, thereby has avoided strongly disturbing situation occurring between the sequence of different length, has reduced the complexity of Sequence Planning.
Simultaneously; Because the basic frequency hopping bandwidth that adopts in the embodiment of the invention is that system is provided with in advance; Or adjust according to the demand of himself; So can satisfy the restriction of sequence length and number, can provide enough basic sequences to distribute to peripheral cell, reduced the complexity of Sequence Planning in the system.
The technical scheme that the embodiment of the invention provides; Utilize the CAZAC sequence as pilot frequency sequence; Because the normal amplitude characteristic of CAZAC sequence, the waveform that transmits has the ratio of lower peak value and average power, can guarantee that the power that transmits drops in the range of linearity of power amplifier; Requirement for the transmitting terminal power amplifier is lower, can reduce the cost and the power consumption of subscriber terminal equipment; And the frequency domain response of CAZAC sequence also is permanent amplitude, makes receiving terminal can compare the fair channel fading that estimates each frequency range, and can be because of not smaller in the signal amplitude of indivedual frequency ranges, and influences the overall channel estimating performance in base station.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (17)
1. the resource allocation methods of a reference signal is characterized in that, this method comprises:
In basic frequency hopping bandwidth, distribute code channel for reference signal, said basic frequency hopping bandwidth is the fundamental frequency unit that said reference signal is carried out the frequency hopping emission; And
The reference signal that is at least two code channels is distributed different frequency hopping bandwidth, the frequency hopping bandwidth of being distributed be said reference signal within a certain period of time frequency hopping experience the perhaps bandwidth of covering.
2. the method for claim 1 is characterized in that, the sign indicating number sequence that said code channel uses is normal amplitude zero an auto-correlation CAZAC sequence.
3. method as claimed in claim 2 is characterized in that, said CAZAC sequence is for pricking the cycle shift sequence of doffer-first Zadoff-Chu basic sequence and/or said Zadoff-Chu basic sequence.
4. the method for claim 1 is characterized in that, the integral multiple that said different frequency hopping bandwidth are basic frequency hopping bandwidth.
5. method as claimed in claim 4 is characterized in that, said basic frequency hopping bandwidth is provided with by system in advance, or the system dynamics adjustment.
6. the method for claim 1 is characterized in that, said reference signal is the measurement pilot frequency that a plurality of transmitting antennas of user terminal or user terminal are used for channel quality measurement.
7. method as claimed in claim 2 is characterized in that, the said code channel of distributing to different reference signals is dynamic change in time.
8. the launching technique of a reference signal is characterized in that, this method comprises:
Confirm the sign indicating number sequence that reference signal is used in basic frequency hopping bandwidth, said basic frequency hopping bandwidth is the fundamental frequency unit that said reference signal is carried out the frequency hopping emission; And
In the frequency hopping bandwidth of distributing, carry out the frequency hopping transmitted reference signal; The frequency hopping bandwidth of said distribution is the said reference signal frequency hopping bandwidth that experiences or cover within a certain period of time, and is that network side is distributed at least two different frequency hopping bandwidth of different reference signals.
9. method as claimed in claim 8 is characterized in that, the sign indicating number sequence that said reference signal is used is normal amplitude zero an auto-correlation CAZAC sequence.
10. method as claimed in claim 9 is characterized in that, said CAZAC sequence is for pricking the cycle shift sequence of doffer-first Zadoff-Chu basic sequence and/or said Zadoff-Chu basic sequence.
11. method as claimed in claim 8 is characterized in that, said reference signal transmit cycle is configurable.
12. method as claimed in claim 8 is characterized in that, said reference signal is carried out the frequency hopping emission by the specific frequency-hopping mode in sub-district.
13. method as claimed in claim 8 is characterized in that, carries out the frequency hopping emission on the partial-band of said reference signal in the frequency hopping bandwidth.
14. the resource allocation device of a reference signal is characterized in that, this device comprises code channel distribution module and frequency hopping bandwidth allocation module,
Said code channel distribution module is used in basic frequency hopping bandwidth, distributing code channel for reference signal, and said basic frequency hopping bandwidth is the fundamental frequency unit that said reference signal is carried out the frequency hopping emission;
Said frequency hopping bandwidth allocation module, the reference signal that is used at least two said distribution code channels is distributed different frequency hopping bandwidth, the frequency hopping bandwidth of being distributed be said reference signal within a certain period of time frequency hopping experience the perhaps bandwidth of covering.
15. device as claimed in claim 14 is characterized in that, the sign indicating number sequence of said code channel is normal amplitude zero an auto-correlation CAZAC sequence.
16. the emitter of a reference signal is characterized in that, this device comprises yard a sequence determination module and a transmitter module,
Said sign indicating number sequence determination module is used for the sign indicating number sequence that definite reference signal is used in basic frequency hopping bandwidth, said basic frequency hopping bandwidth is the fundamental frequency unit that said reference signal is carried out the frequency hopping emission;
Said transmitter module; Be used for taking place frequently and penetrate reference signal at the frequency hopping bandwidth introskip that distributes; The frequency hopping bandwidth of said distribution is the said reference signal frequency hopping bandwidth that experiences or cover within a certain period of time, and is that network side is distributed at least two different frequency hopping bandwidth of different reference signals.
17. device as claimed in claim 16 is characterized in that, the sign indicating number sequence that said reference signal is used is normal amplitude zero an auto-correlation CAZAC sequence.
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| JP5059800B2 (en) * | 2009-03-16 | 2012-10-31 | 株式会社エヌ・ティ・ティ・ドコモ | Radio base station apparatus, mobile station apparatus, and radio communication method |
| CN101873601A (en) | 2009-04-27 | 2010-10-27 | 松下电器产业株式会社 | Method and system for setting reference signal in wireless communication system |
| CN102088309B (en) * | 2009-12-04 | 2014-09-10 | 重庆无线绿洲通信技术有限公司 | Method and device for generating reference signal used for estimating channel quality |
| WO2011075908A1 (en) * | 2009-12-25 | 2011-06-30 | Nokia Siemens Networks Oy | Mapping reference signal for multi-cell transmission |
| CN102158874B (en) * | 2010-02-12 | 2014-04-30 | 华为技术有限公司 | Method and device for measuring channel |
| CN101841918B (en) * | 2010-04-21 | 2012-12-12 | 华为技术有限公司 | Bandwidth resource allocation method and device for measuring reference signal |
| CN102263766B (en) * | 2011-08-29 | 2014-03-12 | 清华大学 | Frequency division multiple access method of variable-bandwidth FMT (frequency modulated transmitter) based on single-carrier transmission |
| US9516531B2 (en) * | 2011-11-07 | 2016-12-06 | Qualcomm Incorporated | Assistance information for flexible bandwidth carrier mobility methods, systems, and devices |
| WO2015106446A1 (en) * | 2014-01-17 | 2015-07-23 | 富士通株式会社 | Resource configuration method, method and apparatus for object discovery and communication system |
| WO2016138643A1 (en) * | 2015-03-04 | 2016-09-09 | 华为技术有限公司 | Frequency hopping-based transmission apparatus, system and method |
| US10862722B2 (en) * | 2018-02-01 | 2020-12-08 | Qualcomm Incorporated | Reference signal transmission techniques for non-orthogonal multiple access wireless communications |
| CN111757330B (en) * | 2019-03-27 | 2021-12-28 | 华为技术有限公司 | User pairing method and related equipment |
| CN110224954B (en) * | 2019-06-10 | 2020-07-14 | 中国人民解放军陆军工程大学 | Method and system for realizing anti-tracking interference of communication based on baseband signal processing |
| WO2022134061A1 (en) * | 2020-12-25 | 2022-06-30 | 北京小米移动软件有限公司 | Scheduling information sending methods, scheduling information receiving methods and apparatuses |
| CN112737997B (en) * | 2020-12-25 | 2022-09-13 | 上海微波技术研究所（中国电子科技集团公司第五十研究所） | Navigation communication integrated signal waveform construction method and system based on FH-OFDM |
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