CN106301735B - A kind of generation method of downlink synchronous signal and base station - Google Patents
A kind of generation method of downlink synchronous signal and base station Download PDFInfo
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- CN106301735B CN106301735B CN201610629189.XA CN201610629189A CN106301735B CN 106301735 B CN106301735 B CN 106301735B CN 201610629189 A CN201610629189 A CN 201610629189A CN 106301735 B CN106301735 B CN 106301735B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
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Abstract
The application proposes generation method and the base station of a kind of downlink synchronous signal.A kind of downlink synchronous signal generation method is applied to base station, this method comprises: system frequency resource is divided into multiple frequency bands；In each frequency band, a band frequency resource is chosen respectively, as primary bandwidth region；Radio frames are respectively divided to each frequency band；Respectively in the radio frames in the primary bandwidth region of each frequency band, downlink synchronous signal is generated.Using technical scheme, can complete in the communication scenes that broadband system and narrowband systems coexist, the generation of downlink synchronous signal.
Description
Technical field
The present invention relates to the generation methods and base station of field of communication technology more particularly to a kind of downlink synchronous signal.
Background technique
In a communications system, receiving party will guarantee synchronous in time with information sender, just can be carried out information biography
It is defeated.If receiving-transmitting sides synchronous error is excessive, communication system performance will have a direct impact on, or even communication system is caused to paralyse.Therefore
Simultaneous techniques is most important for communication system, and the transmission of synchronization signal is even more the basis that communication system works normally.
In long term evolution (Long Term Evolution, LTE) system, downlink synchronous signal occupies system bandwidth
The position of intermediate 6 Physical Resource Block, that is to say, that terminal will at least support the bandwidth of 6 Physical Resource Block, just can be carried out down
The synchronization of row system.In this case, the narrow-band communication system for bandwidth less than 6 Physical Resource Block, just cannot be according to such
It is synchronous that method carries out downlink system.Therefore, for the downlink synchronous signal generation method of traditional LTE system, it is only applicable to broadband
The synchronization signal of system generates, and cannot complete the life of downlink synchronous signal in the communication scenes that broadband system and narrowband systems coexist
At.
Summary of the invention
In order to solve the defect and deficiency of the above-mentioned prior art, the present invention proposes a kind of generation method of downlink synchronous signal
And base station, it can complete in the communication scenes that broadband system and narrowband systems coexist, the generation of downlink synchronous signal.
A kind of generation method of downlink synchronous signal is applied to base station, this method comprises:
System frequency resource is divided into multiple frequency bands；
In each frequency band, a band frequency resource is chosen respectively, as primary bandwidth region；
Radio frames are respectively divided to each frequency band；
Respectively in the radio frames in the primary bandwidth region of each frequency band, downlink synchronous signal is generated.
Preferably, described respectively in the radio frames in the primary bandwidth region of each frequency band, generate down-going synchronous
After signal, the method also includes:
The radio frames are divided at set time intervals, obtain dividing boundary；
In the primary bandwidth region, division boundary apart from downlink synchronous signal setting time interval is raw
At auxiliary synchronous signal.
Preferably, described respectively in the radio frames in the primary bandwidth region of each frequency band, generate down-going synchronous
Signal, comprising:
Identification obtains the common radio frame boundaries position of the multiple frequency band；
Respectively in the radio frames at the common radio frame boundaries position in the primary bandwidth region, under generation
Line synchronising signal.
Preferably, described respectively in the radio frames in the primary bandwidth region of each frequency band, generate down-going synchronous
Signal, comprising:
For each frequency band, downlink synchronous signal is generated respectively；
The downlink synchronous signal is respectively mapped in the radio frames in the primary bandwidth region of each frequency band.
Preferably, the identification obtains the common radio frame boundaries position of the multiple frequency band, comprising:
Calculate separately the wireless frame period of each frequency band；
Calculate the least common multiple of the wireless frame period of each frequency band；
By the beginning boundary of first radio frames of each frequency band transmission, the radio frame boundaries common as first
Position；
In each frequency band, will be apart from the time interval of described first common radio frame boundaries position respectively
The radio frame boundaries position of the integral multiple of the least common multiple is set as common radio frame boundaries position.
A kind of base station, comprising:
Frequency band division unit, for system frequency resource to be divided into multiple frequency bands；
Frequency selection purposes unit, for a band frequency resource being chosen respectively, as primary bandwidth region in each frequency band；
Radio frames division unit, for radio frames to be respectively divided to each frequency band；
Synchronization signal generation unit, in the radio frames in the primary bandwidth region of each frequency band, giving birth to respectively
At downlink synchronous signal.
Preferably, the base station further include:
Second division unit obtains dividing boundary for dividing the radio frames at set time intervals；
Auxiliary signal generation unit is used in the primary bandwidth region, when apart from downlink synchronous signal setting
Between the division boundary that is spaced, generate auxiliary synchronous signal.
Preferably, the synchronization signal generation unit, comprising:
Boundary Recognition unit obtains the common radio frame boundaries position of the multiple frequency band for identification；
Signal generation unit, at the common radio frame boundaries position respectively in the primary bandwidth region
Radio frames in, generate downlink synchronous signal.
Preferably, the synchronization signal generation unit, comprising:
Generation unit generates downlink synchronous signal for being directed to each frequency band respectively；
Map unit, for the downlink synchronous signal to be respectively mapped in the primary bandwidth region of each frequency band
Radio frames in.
Preferably, the Boundary Recognition unit, comprising:
First computing unit, for calculating separately the wireless frame period of each frequency band；
Second computing unit, the least common multiple of the wireless frame period for calculating each frequency band；
First processing units, for by the beginning boundary of first radio frames of each frequency band transmission, as first
A common radio frame boundaries position；
The second processing unit is used in each frequency band, respectively will be apart from described first common radio frames side
The time interval of boundary position is the radio frame boundaries position of the integral multiple of the least common multiple, is set as common radio frames side
Boundary position.
The generation method of downlink synchronous signal proposed by the present invention is applied to base station.System frequency resource is divided first
For multiple frequency bands, different frequency bands uses for the communication system of different bandwidth；Then it in the multiple frequency band, chooses respectively
Radio frames are respectively divided as primary bandwidth region, and to the multiple frequency band in one band frequency resource；Finally respectively described more
In the primary bandwidth region of a frequency band, downlink synchronous signal is generated.In the technical solution of the present invention, each corresponding communication system
System, generates downlink synchronous signal in the primary bandwidth region of system respectively, completes broadband system and coexist with narrowband systems
Communication scenes in, the generation of downlink synchronous signal.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow diagram of the generation method of downlink synchronous signal disclosed by the embodiments of the present invention；
Fig. 2 is the schematic diagram disclosed by the embodiments of the present invention that system frequency resource is divided into multiple frequency bands；
Fig. 3 is the schematic diagram disclosed by the embodiments of the present invention divided to radio frames and generate auxiliary synchronous signal；
Fig. 4 is the flow diagram of the method disclosed by the embodiments of the present invention for generating PSS sequence；
Fig. 5 is the flow diagram of the method disclosed by the embodiments of the present invention for generating SSS sequence；
Fig. 6 is the method disclosed by the embodiments of the present invention for identifying and obtaining the common radio frame boundaries position of multiple frequency bands
Flow diagram；
Fig. 7 is a kind of structural schematic diagram of base station disclosed by the embodiments of the present invention；
Fig. 8 is the structural schematic diagram of another base station disclosed by the embodiments of the present invention；
Fig. 9 is the structural schematic diagram of another base station disclosed by the embodiments of the present invention；
Figure 10 is the structural schematic diagram of another base station disclosed by the embodiments of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of generation methods of downlink synchronous signal, are applied to base station, shown in Figure 1,
This method comprises:
S101, system frequency resource is divided into multiple frequency bands；
Specifically, data communication needs to occupy certain frequency bandwidth, system frequency resource refers to for data communication
Frequency range.In existing 4GLTE system, mainly interpersonal communication, system frequency resource is all used for user
Between communication, do not need to be divided.But in the following 5G communication system, in addition to interpersonal communication continues to enhance
Except, it also will increase the communication between people and object, object and object.It, will not be as person to person for the communication between people and object, object and object
Between communication have very big data volume like that, therefore do not need to occupy too many frequency bandwidth.
In the following 5G communication system, different communication services, the bandwidth of occupancy is different, and therefore, it is necessary to by system frequency
Resource is divided into multiple frequency bands, that is, is divided into different frequency ranges, the corresponding communication service of each frequency band, that is to say, that should
Communication service sends data by corresponding frequency band.
As shown in Figure 2, in embodiments of the present invention, for the ease of image explanation, the frequency band marked off is known as being sliced.
The embodiment of the present invention assume: slice 1 shown in frequency band be used for interpersonal communication, slice 2 shown in frequency band for people with
Communication between object, frequency band shown in slice 3 is for communication between object and object.Then according to system described in the embodiment of the present invention
Frequency resource division methods, frequency band shown in slice 1 are served only for transmitting the data communicated between men, frequency shown in slice 2
Band is served only for the data communicated between transmission people and object, and frequency band shown in slice 3 is served only for the number communicated between transmission object and object
According to.
In practical application scene, it is understood that there may be more different communication services can be with for different communication services
It is each communication service referring to the technical solution of the embodiment of the present invention, divides corresponding frequency band for the logical of the communication service
Letter.
It should be noted that dividing described in the embodiment of the present invention to system frequency resource, basis is marked off
The corresponding type of traffic of frequency band carries out.Specifically, the bandwidth needed when being normally carried out according to communication service divides phase
The frequency band answered.For example, it is assumed that interpersonal communication service needs the bandwidth of 100MHz, then divided from system frequency resource
The frequency band of 100MHz is used as slice 1 for interpersonal communication out.
S102, in each frequency band, a band frequency resource is chosen respectively, as primary bandwidth region；
Specifically, the portfolio of all kinds of communication services can all increase substantially in the following 5G communication system, different is logical
Between communication service, may occur the peak traffic phase in different time period.Based on the above situation, if it is possible to according to different communication
The portfolio of business dynamically adjusts the size of the corresponding frequency band of communication service, can be further improved band utilization efficiency, most
Frequency resource is utilized to limits, while further guaranteeing the quality of every communication service.
In embodiments of the present invention, system frequency resource is divided into according to different type of traffic by different frequency bands
Later, in the frequency range that each frequency band is included, a band frequency is chosen respectively, using this band frequency as primary bandwidth area
Domain.Part except the primary bandwidth region of each band internal, referred to as extended area, base station can be according to the loads of network
And the variation of the portfolio of different communication business, the size of different frequency bands is dynamically adjusted, so that frequency band size can expire in real time
The demand of sufficient communication service.
It should be noted that the size in primary bandwidth region, it be according to the corresponding type of traffic of frequency band where it
To choose.Primary bandwidth region wants to guarantee that corresponding communication service can complete basic service, that is to say, that each
The size in the primary bandwidth region of frequency band is minimum bandwidth required for communication service corresponding to the frequency band.When base station according to
When network load dynamic adjustment different frequency bands size, it is necessary to assure the size of each frequency band is big not less than its primary bandwidth region
It is small, to guarantee that the corresponding communication service of the frequency band can be normally carried out.
As shown in Figure 2, in embodiments of the present invention, in slice 1, slice 2, slice 3, primary bandwidth area is chosen respectively
Domain, such as the part between two dotted lines in slice each in figure.Primary bandwidth region inside each slice meets its place
The corresponding communication service of frequency band needed for minimum bandwidth.Specifically, the bandwidth in slice 1 between dotted line, can satisfy people with
Minimum bandwidth needed for communication service between people；Bandwidth in slice 2 between dotted line, can satisfy the communication between people and object
Minimum bandwidth needed for business；The bandwidth between dotted line in slice 3, can satisfy needed for the communication service between object and object
Minimum bandwidth.
Expansion region except the primary bandwidth region shown in the dotted line in each slice, can be according to the change of portfolio
Change, realizes that dynamic adjusts.For example, it is assumed that at a time, interpersonal message volume surges, band shown in slice 1
Width is almost utilized, and the message volume between people and object is seldom, and the utilization of bandwidth shown in slice 2 is very
Low, then base station can dynamically turn slice 2 down, and the band resource vacated is given to slice 1, for communicating use between men.
It should be noted that can turn down is that slice 2 is adjusted to its primary bandwidth area size to greatest extent to slice 2.
S103, radio frames are respectively divided to each frequency band；
Specifically, in step s101, according to different communication type of service, respectively communication service has divided frequency band.?
In this step, according to the difference of the corresponding communication service of each frequency band, radio frames is respectively divided to each frequency band, are used for transmission this
The data of communication service corresponding to frequency band.
It should be noted that the size and frame structure of the radio frames of each frequency band, are all by the corresponding communication service of frequency band
What type determined, the structure of the data of different communication service transmission is different, therefore, is used for transmission the length of the radio frames of the data
Degree or structure are also different.
It in embodiments of the present invention, is slice 1, radio frames, as shown in Figure 2, division are respectively divided in slice 2, slice 3
The time span of radio frames is different from, because the corresponding communication service of different slices is different.Interpersonal communication number
According to the communication data between the communication data and object and object between, people and object, structure is all different, and therefore, is used for transmission this
The time span of the radio frames of a little different communication data is also all different.Radio frames in each slice, which are only used for transmitting this, cuts
The data of the corresponding communication service of piece.
S104, respectively in the radio frames in the primary bandwidth region of each frequency band, generate downlink synchronous signal.
Specifically, each frequency band is used for a certain communication service, the data to complete the communication service are transmitted.Every
When a kind of traffic transmission data, requires to send downlink synchronous signal, enable the terminals to synchronous receiving data information.Cause
This requires to generate downlink synchronous signal respectively in each frequency band, guarantees that communication service is gone on smoothly.
It is similar with downlink synchronous signal is generated in existing 4GLTE system in wireless timeslot, in embodiments of the present invention,
It also needs to generate downlink synchronous signal in radio frames.Specifically, since the communication service that each frequency band is applicable in is different,
Wireless frame structure is different, and therefore, the synchronization signal generated in the radio frames of each frequency band is not also identical.In real work scene
In, according to the difference for the communication service that different frequency bands are applicable in, in the radio frames in its primary bandwidth region, generate corresponding construction
Synchronization signal.
In the technical solution of the present invention, the mapping method of the structure to the synchronization signal specifically generated and synchronization signal is not
It limits, only the frequency location for generating downlink synchronous signal is defined.Any difference suitable for technical solution of the present invention
The downlink synchronous signal and its mapping method of structure may be used to the generation of downlink synchronous signal described in technical solution of the present invention
Method belongs to the scope of the present invention.
It should be noted that downlink synchronous signal used in technical solution of the present invention, frequency domain bandwidth has to protect
Bandwidth of the card no more than the primary bandwidth region where it.In existing 4GLTE system, downlink synchronous signal is uniformly set as accounting for
With the position of 6 Physical Resource Block among system bandwidth, cause in system of the bandwidth less than 6 Physical Resource Block, it can not
Down-going synchronous is realized in this way, and therefore, the downlink synchronous signal generation method in existing 4GLTE system cannot be completed narrow
Downlink synchronous signal when coexisting with system and broadband system generates.And in the technical solution of the present invention, downlink synchronous signal band
Bandwidth of the width no more than the primary bandwidth region of the frequency band where it, that is to say, that the bandwidth of downlink synchronous signal is by its institute
The size in primary bandwidth region of frequency band determine, therefore, whether narrow-band communication system or wide-band communication system, all
Corresponding downlink synchronous signal can be generated.
The generation method of downlink synchronous signal proposed by the present invention is applied to base station.System frequency resource is divided first
For multiple frequency bands, different frequency bands uses for the communication system of different bandwidth；Then it in the multiple frequency band, chooses respectively
Radio frames are respectively divided as primary bandwidth region, and to the multiple frequency band in one band frequency resource；Finally respectively described more
In the primary bandwidth region of a frequency band, downlink synchronous signal is generated.In the technical solution of the present invention, each corresponding communication system
System, generates downlink synchronous signal in the primary bandwidth region of system respectively, completes broadband system and coexist with narrowband systems
Communication scenes in, the generation of downlink synchronous signal.
Optionally, in another embodiment of the present invention, described respectively in the primary bandwidth region of each frequency band
In interior radio frames, after generating downlink synchronous signal, the method also includes:
The radio frames are divided at set time intervals, obtain dividing boundary；
Specifically, to frequency band divide radio frames after, if also needed in a radio frames in time further into
Row divides, and to introduce smaller time interval, transmits more business datums, then according to business needs, to needing radio frames
The frequency band divided sets corresponding radio frames and divides time interval, by the radio frames at set time intervals into
Row divides, and divides each time, can obtain dividing boundary accordingly.
As shown in figure 3, in slice 1 and slice 3, according to business needs, to first radio frames on the right side of synchronization signal
It is divided, obtained division boundary is as shown in dotted line vertical in figure.The communication industry as applied by slice 1 and slice 3
Business is different, and the structure of the data transmitted is also different, so slice 1 is different with the radio-frame time length of slice 3, to slice 1
When being divided with the radio frames of slice 3, time interval is set separately to slice 1 and slice 3, at set time intervals,
It is divided, obtains dividing boundary as shown in Figure 3.
In the primary bandwidth region, division boundary apart from downlink synchronous signal setting time interval is raw
At auxiliary synchronous signal.
Specifically, further division is carried out to radio frames, when transmitting data, in order to solve in radio-frame time interval
The stationary problem of the data of transmission needs to regenerate an auxiliary synchronous signal in radio-frame time interval, is used for radio frames
Time interval in data transmission when carry out down-going synchronous.In different frequency bands, applicable since the data of its transmission are different
Type of traffic is also different, and therefore, the time interval of auxiliary synchronous signal and downlink synchronous signal is not also identical.In the present invention
In embodiment, different frequency bands according to its applicable type of traffic, set auxiliary synchronous signal and downlink synchronous signal when
Between be spaced.
It should be noted that frequency range requirement when generating to downlink synchronous signal is similar, assist in synchronization letter is being generated
Number when, it is also desirable to guarantee auxiliary synchronous signal inside primary bandwidth region, i.e., the bandwidth of auxiliary synchronous signal cannot be greater than base
The bandwidth of this bandwidth region.The division boundary apart from downlink synchronous signal setting time interval generates assist in synchronization
Signal, actually in the adjacent radio frames in the left side on the division boundary apart from downlink synchronous signal setting time interval
Between be spaced in or the adjacent radio-frame time interval in right side in, generate auxiliary synchronous signal.
In embodiments of the present invention, as shown in Figure 3, the division of the radio frames on the right side of the downlink synchronous signal 1 of slice 1
Boundary generates auxiliary synchronous signal 1a；Some in the radio frames on 3 right side of downlink synchronous signal of slice 3 divides boundary
Place generates auxiliary synchronous signal 3a.The time interval and down-going synchronous of downlink synchronous signal 1 and auxiliary synchronous signal 1a letter
Time interval number between 3 and auxiliary synchronous signal 3a is according to the applicable type of traffic of slice 1 and slice 3 and right
What demand when radio frames are divided determined, the two may be the same or different.
Optionally, in another embodiment of the present invention, described respectively in the primary bandwidth region of each frequency band
In interior radio frames, downlink synchronous signal is generated, comprising:
Identification obtains the common radio frame boundaries position of the multiple frequency band；
Specifically, when dividing radio frames to each frequency band being divided according to the type of traffic that frequency band is applicable in
, since the type of traffic that each frequency band is applicable in is different, so the radio-frame time length of each frequency band is also different,
That is the boundary position of the radio frames of each frequency band is not alignment.But by several radio-frame time periods it
Afterwards, at some moment, the radio frame boundaries position of each slice can be aligned, and the embodiment of the present invention seeks to identification and obtains often
At the time of the radio frame boundaries position of a slice can be aligned, at this moment, the multiple frequency band has jointly wireless
Frame boundaries position.
Respectively in the radio frames at the common radio frame boundaries position in the primary bandwidth region, under generation
Line synchronising signal.
Specifically, when the terminal for carrying out communication system down-going synchronous supports plurality of communication schemes, if a certain
Moment receives the downlink synchronous signal of the plurality of communication systems of terminal support simultaneously, then terminal can complete the communication to being supported
The combined synchronization of system.Based on the above principles, if the downlink synchronous signal of each frequency band is all disposed within being total to for multiple frequency bands
At same radio frame boundaries position, then it can be selected to carry out some communication system down-going synchronous or right by free terminal
The multiple communication systems itself supported carry out joint down-going synchronous, can further promote communication system performance.
It should be noted that the radio frames at the common radio frame boundaries position in primary bandwidth region
It is interior, downlink synchronous signal is generated, specifically: the left side phase of the common radio frame boundaries position in primary bandwidth region
In the radio frames that adjacent radio frames are interior or right side is adjacent, downlink synchronous signal is generated.For different frequency bands, can choose altogether
With radio frame boundaries position the adjacent radio frames in left side in generate downlink synchronous signal, also can choose common wireless
Downlink synchronous signal is generated in the adjacent radio frames in the right side of frame boundaries position, different frequency bands can choose in common radio frames
Downlink synchronous signal is generated in the radio frames of the same side of boundary position, also can choose in common radio frame boundaries position
Downlink synchronous signal is generated in not ipsilateral radio frames.It is quickly completed under the joint to multiple communication systems for the ease of terminal
Row synchronizes, and the embodiment of the present invention selects each frequency band raw in the adjacent radio frames in the right side of common radio frame boundaries position
At downlink synchronous signal.
As shown in Fig. 2, in embodiments of the present invention, finding slice 1, slice 2, the common radio frame boundaries position for being sliced 3
It sets, on the right side of the common radio frame boundaries position in adjacent radio frames, generates downlink synchronous signal 1, down-going synchronous letter respectively
Numbers 2 and downlink synchronous signal 3.
Optionally, in another embodiment of the present invention, described respectively in the primary bandwidth region of each frequency band
In interior radio frames, downlink synchronous signal is generated, comprising:
For each frequency band, downlink synchronous signal is generated respectively；
Specifically, in the following 5G communication system, it can be using the downlink synchronous signal sequence in existing LTE communication system
The generation method of column, can also develop new, and the downlink synchronous signal sequence for being more suitable for the communication system of condition of multi-system coexistence is raw
At method.Technical solution of the present invention is without limitation.
In embodiments of the present invention, using downlink synchronous signal sequence generating method used in existing 4GLTE system
Generate downlink synchronous signal sequence.Since the downlink synchronous signal sequence in existing 4GLTE system is longer, therefore, it is necessary to occupy
More Physical Resource Block.In embodiments of the present invention, in order to guarantee bandwidth shared by downlink synchronous signal no more than where its
The bandwidth in the primary bandwidth region of frequency band, the bandwidth in the primary bandwidth region of frequency band referring to where downlink synchronous signal, under setting
The length of line synchronising signal sequence.
Downlink synchronous signal sequence is made of PSS sequence and SSS sequence.In embodiments of the present invention, it is assumed that slice 1 is basic
Bandwidth region allows downlink synchronous signal sequence length to be 62, then the process for generating downlink synchronous signal sequence is exemplified below:
Specifically, as shown in figure 4, the step of generating PSS sequence are as follows:
S401, the cell ID cell_id according to input obtain ID in the group of cell to 3 modulus values (value is 0~2)；
S402, according to ID in different cell groups, find corresponding root index u；
The root indexes u, is provided by table 1:
Table 1
S403, the full 0 sequence that PSS is initialized as to one 62；
Specifically, the size of PSS sequence is determined by the size in the primary bandwidth region where PSS sequence, of the invention real
It applies in example, it is assumed that the bandwidth in the primary bandwidth region where downlink synchronous signal determines that downlink synchronous signal sequence length is 62
PSS, then is initialized as one 62 full 0 sequences by position；
S404, according to ZC sequence, utilize u value to generate from the angle of frequency domain and be used for the sequence d of PSSu(n)。
Specifically, being used for the sequence d of PSSu(n) it is generated by a frequency domain ZC sequence, such as following formula:
As shown in figure 5, the step of generating SSS sequence are as follows:
S501, according to cell ID, extrapolate cell group number and organize in ID, table look-up and obtain m0 and m1；
Specifically, to 3 modulus values, obtaining ID in the group of cell according to cell ID cell_id (value is 0~2).Separately
Outside, since cell ID cell_id is equal to the cell group number that ID in the group of cell adds 3 times, so cell group number is cell
Mark cell_id subtracts the difference of ID in the group of cell divided by 3 quotient.
The value of m0 and m1 can be obtained from table 2:
Table 2
S502, formation sequenceWith
Specifically, sequenceWithBy m-sequenceTwo different cyclic shifts are done to obtain:
Wherein,0≤i≤30,
Wherein x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1
S503, formation sequence c0(n) and c1(n)；
Specifically, two scrambler sequence c0(n) and c1(n) by m-sequenceIt is obtained according to different cyclic shifts:
WhereinIt is physical-layer cell ID groupInterior physical layer ID.
X (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1
S504, formation sequenceWith
Specifically, two scrambler sequencesWithBy m-sequenceIt is obtained according to different cyclic shifts
:
m0And m1Value can be obtained from table 2.
X (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1
S505, linear transformation is done to three sequences of above-mentioned generation, obtains the sequence d (n) of SSS；
Specifically, sequence d (0) ..., d (61) is staggeredly composed of two a length of 31 binary sequences.It is two long
It is to be mapped to above different subframes for 31 sequence, the combination of two a length of 31 sequences, different subframes not
It is the same:
Wherein 0≤n≤30.Subscript m0And m1By physical-layer cell ID group numberIt determines:
m0=m ' mod31
The synchronization signal is respectively mapped in the radio frames in the primary bandwidth region of each frequency band.
It is to be mapped to different subframes specifically, when PSS sequence is mapped in the radio frames in primary bandwidth region
It transmits on symbol, on the transmission symbol, is used for transmission the resource particle (k, l) of PSS sequence are as follows:
ak,l=d (n), n=0 ..., 61
It will be shown below in radio frames that SSS sequence is mapped in primary bandwidth region:
ak,l=d (n), n=0 ..., 61
It should be noted that working as the permitted downlink synchronous signal in primary bandwidth region of the occupied frequency band of communication system
When bandwidth very little, by adjusting the sequence length of PSS sequence and SSS sequence in the embodiment of the present invention, it can be generated suitable
Downlink synchronous signal for the communication system.
In practical projects, the downlink synchronous signal sequence of suitable length can also be generated according to art methods, so
The downlink synchronous signal sequence is split into the downlink synchronous signal tract suitable for multiple communication systems afterwards, it respectively will be each
A downlink synchronous signal tract is mapped in the radio frames in primary bandwidth region of corresponding communication system bands.
Optionally, in another embodiment of the present invention, described identify obtains the common wireless of the multiple frequency band
Frame boundaries position, as shown in Figure 6, comprising:
S601, the wireless frame period for calculating separately each frequency band；
Specifically, to each frequency band divide radio frames after, available division boundary, two divide boundaries between when
Between, the as wireless frame period of the frequency band.
The least common multiple of the wireless frame period of S602, calculating each frequency band；
It is shown in Figure 2 specifically, in embodiments of the present invention, be sliced 1 wireless frame period x=4, be sliced 2 it is wireless
Frame period y=1 is sliced 3 wireless frame period z=6.4,1 and 6 least common multiple is 12, then is sliced 1, slice 2 and slice 3
Wireless frame period least common multiple be 12.
S603, by the beginning boundary of first radio frames of each frequency band transmission, it is common wireless as first
Frame boundaries position；
Specifically, the beginning boundary of first radio frames, at the time of all corresponding to system starts, at the moment, often
The beginning boundary of the radio frames of a frequency band is all aligned, the radio frame boundaries position common as first.
As shown in Figure 2, when being sliced 1, slice 2, slice 3 starting to transmit data, the beginning boundary of first radio frames
It is alignment, all corresponding 0 moment, therefore the radio frame boundaries position that the beginning boundary of first radio frames is common as first
It sets.
S604, in each frequency band, respectively by the time apart from described first common radio frame boundaries position
Between be divided into the least common multiple integral multiple radio frame boundaries position, be set as common radio frame boundaries position.
Specifically, in each frequency band, since first common radio frame boundaries position, by described minimum public
The time of the integral multiple of multiple, that is each frequency band have passed through equally long time interval, and the radio frame boundaries of arrival are also
It is the radio frame boundaries for corresponding to synchronization, as common radio frame boundaries position.
In embodiments of the present invention, as shown in Figure 2, the time interval at 0 moment of distance is 12 chronomeres in slice 1
Position, slice 2 in 0 moment of distance time interval be 12 chronomeres position and slice 3 in 0 moment of distance time
Between be divided into the positions of 12 chronomeres, be all radio frame boundaries position in slice, be then set as common radio frame boundaries position
It sets.And so on, the time interval with the common radio frame boundaries position is the position of the integral multiple of the least common multiple
It sets, is all common radio frame boundaries position.
Shown in Figure 7 the embodiment of the invention also discloses a kind of base station, which includes:
Frequency band division unit 101, for system frequency resource to be divided into multiple frequency bands；
Frequency selection purposes unit 102, for a band frequency resource being chosen respectively, as primary bandwidth area in each frequency band
Domain；
Radio frames division unit 103, for radio frames to be respectively divided to each frequency band；
Synchronization signal generation unit 104, for respectively in the radio frames in the primary bandwidth region of each frequency band,
Generate downlink synchronous signal.
Specifically, in the embodiment of the present invention each section specific works content, refer to the interior of corresponding embodiment of the method
Hold, details are not described herein again.
The generation method of downlink synchronous signal proposed by the present invention is implemented in base station proposed by the present invention, and frequency band first divides
System frequency resource is divided into multiple frequency bands by unit 101, and different frequency bands uses for the communication system of different bandwidth；Then
Frequency selection purposes unit 102 chooses a band frequency resource, as primary bandwidth region, and by nothing in the multiple frequency band respectively
Radio frames are respectively divided to the multiple frequency band in line frame division unit 103；Last synchronization signal generation unit 104 is respectively described
In the primary bandwidth region of multiple frequency bands, downlink synchronous signal is generated.In the technical solution of the present invention, each corresponding communication system
System, generates downlink synchronous signal in the primary bandwidth region of system respectively, completes broadband system and coexist with narrowband systems
Communication scenes in, the generation of downlink synchronous signal.
Optionally, in another embodiment of the present invention, as shown in figure 8, the base station further include:
Second division unit 105 obtains dividing side for dividing the radio frames at set time intervals
Boundary；
Auxiliary signal generation unit 106, for being set apart from the downlink synchronous signal in the primary bandwidth region
The division boundary of time interval generates auxiliary synchronous signal.
Specifically, in the embodiment of the present invention each section specific works content, refer to the interior of corresponding embodiment of the method
Hold, details are not described herein again.
Optionally, in another embodiment of the present invention, shown in Figure 7, synchronization signal generation unit 104, comprising:
Boundary Recognition unit 107 obtains the common radio frame boundaries position of the multiple frequency band for identification；
Signal generation unit 108, for the common radio frame boundaries position respectively in the primary bandwidth region
It sets in the radio frames at place, generates downlink synchronous signal.
Specifically, in the embodiment of the present invention each section specific works content, refer to the interior of corresponding embodiment of the method
Hold, details are not described herein again.
Optionally, in another embodiment of the present invention, shown in Figure 9, synchronization signal generation unit 104, comprising:
Generation unit 109 generates downlink synchronous signal for being directed to each frequency band respectively；
Map unit 110, for the downlink synchronous signal to be respectively mapped to the primary bandwidth area of each frequency band
In radio frames in domain.
Specifically, in the embodiment of the present invention each section specific works content, refer to the interior of corresponding embodiment of the method
Hold, details are not described herein again.
Optionally, in another embodiment of the present invention, shown in Figure 10, Boundary Recognition unit 107, comprising:
First computing unit 1071, for calculating separately the wireless frame period of each frequency band；
Second computing unit 1072, the least common multiple of the wireless frame period for calculating each frequency band；
First processing units 1073, for by the beginning boundary of first radio frames of each frequency band transmission, as
First common radio frame boundaries position；
The second processing unit 1074 respectively will be common wireless apart from described first in each frequency band
The time interval of frame boundaries position is the radio frame boundaries position of the integral multiple of the least common multiple, is set as common wireless
Frame boundaries position.
Specifically, in the embodiment of the present invention each section specific works content, refer to the interior of corresponding embodiment of the method
Hold, details are not described herein again.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of generation method of downlink synchronous signal, which is characterized in that it is applied to base station, this method comprises:
System frequency resource is divided into multiple frequency bands；
In each frequency band, a band frequency resource is chosen respectively, as primary bandwidth region；
Radio frames are respectively divided to each frequency band；
Respectively in the radio frames in the primary bandwidth region of each frequency band, downlink synchronous signal is generated；Wherein, under described
The frequency domain bandwidth of line synchronising signal is not more than the bandwidth in the primary bandwidth region where it.
2. the method according to claim 1, wherein described respectively in the primary bandwidth region of each frequency band
In interior radio frames, after generating downlink synchronous signal, the method also includes:
The radio frames are divided at set time intervals, obtain dividing boundary；
In the primary bandwidth region, division boundary apart from downlink synchronous signal setting time interval is generated auxiliary
Help synchronization signal.
3. the method according to claim 1, wherein described respectively in the primary bandwidth region of each frequency band
In interior radio frames, downlink synchronous signal is generated, comprising:
Identification obtains the common radio frame boundaries position of the multiple frequency band；
Respectively in the radio frames at the common radio frame boundaries position in the primary bandwidth region, it is same to generate downlink
Walk signal.
4. the method according to claim 1, wherein described respectively in the primary bandwidth region of each frequency band
In interior radio frames, downlink synchronous signal is generated, comprising:
For each frequency band, downlink synchronous signal is generated respectively；
The downlink synchronous signal is respectively mapped in the radio frames in the primary bandwidth region of each frequency band.
5. according to the method described in claim 3, it is characterized in that, described identify obtains the common wireless of the multiple frequency band
Frame boundaries position, comprising:
Calculate separately the wireless frame period of each frequency band；
Calculate the least common multiple of the wireless frame period of each frequency band；
By the beginning boundary of first radio frames of each frequency band transmission, the radio frame boundaries position common as first
It sets；
It is respectively described by the time interval apart from described first common radio frame boundaries position in each frequency band
The radio frame boundaries position of the integral multiple of least common multiple is set as common radio frame boundaries position.
6. a kind of base station characterized by comprising
Frequency band division unit, for system frequency resource to be divided into multiple frequency bands；
Frequency selection purposes unit, for a band frequency resource being chosen respectively, as primary bandwidth region in each frequency band；
Radio frames division unit, for radio frames to be respectively divided to each frequency band；
Synchronization signal generation unit, for respectively in the radio frames in the primary bandwidth region of each frequency band, under generation
Line synchronising signal；Wherein, bandwidth of the frequency domain bandwidth of the downlink synchronous signal no more than the primary bandwidth region where it.
7. base station according to claim 6, which is characterized in that the base station further include:
Second division unit obtains dividing boundary for dividing the radio frames at set time intervals；
Auxiliary signal generation unit is used in the primary bandwidth region, between the downlink synchronous signal setting time
Every division boundary, generate auxiliary synchronous signal.
8. base station according to claim 6, which is characterized in that the synchronization signal generation unit, comprising:
Boundary Recognition unit obtains the common radio frame boundaries position of the multiple frequency band for identification；
Signal generation unit, for the nothing at the common radio frame boundaries position respectively in the primary bandwidth region
In line frame, downlink synchronous signal is generated.
9. base station according to claim 6, which is characterized in that the synchronization signal generation unit, comprising:
Generation unit generates downlink synchronous signal for being directed to each frequency band respectively；
Map unit, the nothing for being respectively mapped to the downlink synchronous signal in the primary bandwidth region of each frequency band
In line frame.
10. base station according to claim 8, which is characterized in that the Boundary Recognition unit, comprising:
First computing unit, for calculating separately the wireless frame period of each frequency band；
Second computing unit, the least common multiple of the wireless frame period for calculating each frequency band；
First processing units, for being total to as first by the beginning boundary of first radio frames of each frequency band transmission
Same radio frame boundaries position；
The second processing unit is used in each frequency band, respectively will be apart from described first common radio frame boundaries position
The time interval set is the radio frame boundaries position of the integral multiple of the least common multiple, is set as common radio frame boundaries position
It sets.
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| CN113612593B (en) * | 2017-03-24 | 2023-01-13 | 展讯通信（上海）有限公司 | Method and device for sending and receiving synchronization signal block in 5G system |
| WO2018227506A1 (en) * | 2017-06-15 | 2018-12-20 | Oppo广东移动通信有限公司 | Method and device for transmitting synchronous signal block |
| CN110392422B (en) * | 2018-04-23 | 2020-10-09 | 华为技术有限公司 | Method and device for determining clock source |
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