CN108023715A - Synchronous signal receiver, sending method and related device - Google Patents
Synchronous signal receiver, sending method and related device Download PDFInfo
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- CN108023715A CN108023715A CN201610974792.1A CN201610974792A CN108023715A CN 108023715 A CN108023715 A CN 108023715A CN 201610974792 A CN201610974792 A CN 201610974792A CN 108023715 A CN108023715 A CN 108023715A
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- synchronizing signal
- direct current
- frequency domain
- current carrier
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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
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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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
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- Computer Networks & Wireless Communication (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of synchronous signal receiver method and device, the method includes the steps：Receive the synchronizing signal that the frequency-region signal format information that base station is sent is default frequency-region signal format information；The frequency domain position of the synchronizing signal is determined by searching for；The positional information of subcarrier where determining direct current carrier based on the relevant information in the synchronizing signal and broadcast channel；The positional information of subcarrier where frequency domain position information and direct current carrier based on the synchronizing signal, determines the frequency domain position of system bandwidth.The present invention also provides a kind of method for transmitting synchronizing signal and device.The method of the invention improves the transmission mode of synchronizing signal, so as to reduce interference of the direct current carrier to synchronizing signal by the position of definite direct current carrier.
Description
Technical field
The present invention relates to wireless communication technology field, and specifically, the present invention relates to a kind of synchronous signal receiver, sender
Method and related device.
Background technology
In Long Term Evolution (LTE, Long-Term Evolution), during downlink transfer, middle subcarrier is not
Modulation data, can so reduce interference of the direct current carrier to other subcarriers.Therefore, Physical Resource Block (PRB,
Physical Resource Block) counting process in not including direct current carrier (DC, Direct Carrier), such as Fig. 1
It is shown.Synchronizing signal (including master sync signal (PSS, Primary Synchronous Signal) and auxiliary synchronous signals (SSS,
Secondly Synchronous Signal)), synchronizing signal takes 6 PRB among system bandwidth, totally 72 subcarriers,
62 subcarriers among wherein have data transfer, and respectively there are 5 subcarriers for not transmitting data on both sides, 6 PRB's among this
72 subcarriers do not include direct current carrier, as shown in Figure 2.
In (NR, New Radio) system of newly eating dishes without rice or wine, in the counting process for carrying out PRB, no longer middle DC is removed
Outside, as shown in Figure 3.The data of DC carrier-wave transmissions among so can be disturbed.
The content of the invention
The purpose of the present invention is intended to reduce interference of the direct current carrier to synchronizing signal so that user equipment can preferably into
Row cell searching.
To achieve these goals, one embodiment of the invention provides a kind of synchronous signal receiver method, comprises the following steps：
Receive the synchronizing signal that the frequency-region signal format information that base station is sent is default frequency-region signal format information；
The frequency domain position of the synchronizing signal is determined by searching for；
The position letter of subcarrier where determining direct current carrier based on the relevant information in the synchronizing signal and broadcast channel
Breath；
The positional information of subcarrier, determines system where frequency domain position information and direct current carrier based on the synchronizing signal
The frequency domain position of bandwidth.
Specifically, the frequency domain position of the synchronizing signal includes the Physical Resource Block that synchronizing signal takes in system frequency domain
Number, the frequency domain position of each Physical Resource Block taken, the subcarrier number of synchronizing signal occupancy, each subcarrier of occupancy are described
The physical resource frequency domain position in the block of occupancy.
Specifically, the frequency-region signal format information of the synchronizing signal includes length, the synchronizing signal of synchronous signal sequence
Sequence length is odd number value or even number value and the subcarrier shared by synchronous signal sequence.
Optionally, subcarrier where determining direct current carrier based on the relevant information in the synchronizing signal and broadcast channel
Positional information, including following at least one method：
Pass through Physical Resource Block where the odd even and direct current carrier of the Physical Resource Block number in the bandwidth of synchronizing signal
The position of subcarrier where location determination direct current carrier；
The position of subcarrier where determining direct current carrier based on configured information, wherein, the configured information includes：System is believed
Breath or high-level signaling or physical layer signaling indicates respectively or the information of joint instructions.
Optionally, the position of Physical Resource Block is determined by way of following at least one where the direct current carrier：
The Physical Resource Block and direct current for being used for transmission synchronizing signal frequency domain edge are obtained by relevant information in broadcast channel
The space-number between Physical Resource Block where carrier wave, it is true according to the frequency location of bandwidth where the space-number and synchronizing signal
The position of Physical Resource Block where determining direct current carrier；
The Physical Resource Block for being used for transmission synchronizing signal frequency domain edge and direct current carrier place based on system information instruction
Physical Resource Block between space-number, determine the position of Physical Resource Block where direct current carrier；
Subband where synchronizing signal Physical Resource Block based on system information instruction and default it is used for transmission synchronization
The space-number between Physical Resource Block where the Physical Resource Block and direct current carrier at signal frequency domain edge, determines direct current carrier institute
In the position of Physical Resource Block；
Frequency range is relative to direct current where the synchronizing signal indicated based on master sync signal sequence and/or auxiliary synchronous signals sequence
The offset of Physical Resource Block where carrier wave, the position of Physical Resource Block where determining direct current carrier.
Specifically, be used for transmission synchronizing signal frequency domain edge Physical Resource Block and direct current carrier where Physical Resource Block
Between space-number be positive integer or negative integer.
Specifically, the positive integer represents that direct current carrier is located at the frequency domain side of the Physical Resource Block low frequency of synchronous signal transmission
Edge, the negative integer represent that direct current carrier is located at the frequency domain edge of the Physical Resource Block high frequency of synchronous signal transmission.
Specifically, the position of subcarrier where determining direct current carrier based on configured information, including：According to the system information
Or the correspondence between the configured information and direct current carrier relevant information in high-level signaling or physical layer signaling, determine that direct current carries
The position of ripple.
Specifically, the direct current carrier relevant information includes, direct current carrier whether there is, the physics where direct current carrier provides
The centre or edge of Physical Resource Block where source block sequence number, direct current carrier are in it.
Another embodiment of the present invention provides a kind of method for transmitting synchronizing signal, comprises the following steps：
The position of subcarrier according to where direct current carrier, determines the frequency domain position of synchronizing signal；
Frequency domain position is arranged to the definite frequency domain position for transmission and frequency-region signal format information is arranged to default
The synchronizing signal of frequency domain format information.
Specifically, the frequency domain position of the synchronizing signal includes the Physical Resource Block that synchronizing signal takes in system frequency domain
Number, the frequency domain position of each Physical Resource Block taken, the subcarrier number of synchronizing signal occupancy, each subcarrier of occupancy are described
The physical resource frequency domain position in the block of occupancy.
Specifically, the frequency-region signal format information of the synchronizing signal includes length, the synchronizing signal of synchronous signal sequence
Sequence length is odd number value or even number value and the subcarrier shared by synchronous signal sequence.
Specifically, according to the position of subcarrier where direct current carrier, the frequency domain position of synchronizing signal is determined, including：
Adjust makes the center of synchronizing signal vacant as the number of the subcarrier of protection band, which is determined
For the position of direct current carrier subcarrier.
Further, the method further includes：
The relevant information or system information in broadcast channel are sent to UE, wherein, relevant information or the system information bag
Include at least one of：Between Physical Resource Block where the Physical Resource Block and direct current carrier at synchronous signal transmission frequency domain edge
The configured information of space-number, the configured information of subband where synchronizing signal Physical Resource Block.
Specifically, be used for transmission synchronizing signal frequency domain edge Physical Resource Block and direct current carrier where Physical Resource Block
Between space-number be positive integer or negative integer.
Specifically, the positive integer represents that direct current carrier is located at the frequency domain side of the Physical Resource Block low frequency of synchronous signal transmission
Edge, the negative integer represent that direct current carrier is located at the frequency domain edge of the Physical Resource Block high frequency of synchronous signal transmission.
Further embodiment of this invention provides a kind of synchronous signal receiver device, including：
Receiving module：Frequency-region signal format information for receiving base station transmission is the same of default frequency-region signal format information
Walk signal；
First determining module：For determining the frequency domain position of the synchronizing signal by searching for；
Second determining module：For determining direct current carrier institute based on the relevant information in the synchronizing signal and broadcast channel
In the positional information of subcarrier；
3rd determining module：For subcarrier where frequency domain position information and direct current carrier based on the synchronizing signal
Positional information, determines the frequency domain position of system bandwidth.
Yet another embodiment of the invention provides a kind of synchronizing signal dispensing device, including：
Determining module：For determining the frequency domain position information of synchronizing signal；
Sending module：Frequency domain position is arranged to the definite frequency domain position and frequency-region signal format information for sending
It is arranged to the synchronizing signal of default frequency domain format information.
Compared with prior art, the solution of the present invention has the following advantages：
By determining the position of direct current carrier, the transmission mode of synchronizing signal is improved, so as to reduce direct current carrier to synchronization
The interference of signal so that user equipment can preferably complete cell searching.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the schematic diagram of prior art direct current carrier disturbance coordination method；
Fig. 2 is the schematic diagram that synchronizing signal takes subcarrier in the prior art；
Fig. 3 is counting process schematic diagram of the system to PRB of newly eating dishes without rice or wine described in the prior art；
Fig. 4 is the flow diagram of synchronous signal receiver method described in the embodiment of the present invention one；
Fig. 5 is that the PRB numbers of the present invention being located at when direct current carrier in the center and system bandwidth of system bandwidth are even numbers
When, the position view of direct current carrier；
Fig. 6 is that the PRB numbers of the present invention being located at when direct current carrier in the center and system bandwidth of system bandwidth are odd numbers
When, the position view of direct current carrier；
Fig. 7 is that the frequency location of bandwidth according to where the space-number and synchronizing signal described in the embodiment of the present invention one is true
The schematic diagram of the position of Physical Resource Block where determining direct current carrier；
Fig. 8 is the flow diagram that the present invention implements two method for transmitting synchronizing signal；
Fig. 9 is described in the embodiment of the present invention two when synchronous signal sequence is even number, and the direct current in synchronizing signal bandwidth carries
The sub-carrier positions schematic diagram of ripple；
Figure 10 is described in the embodiment of the present invention two when synchronous signal sequence is odd number, and the direct current in synchronizing signal bandwidth carries
The sub-carrier positions schematic diagram of ripple；
Figure 11 is described in the embodiment of the present invention two when synchronous signal sequence is odd number, and the direct current outside synchronizing signal bandwidth carries
The sub-carrier positions schematic diagram of ripple；
Figure 12 is the structure diagram of synchronous signal receiver device described in the embodiment of the present invention three；
Figure 13 is the structure diagram of synchronizing signal dispensing device described in the embodiment of the present invention four.
Embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
For the important signal such as synchronizing signal and control signaling, the interference of DC can cause performance bigger decline,
Therefore the influence for reducing DC to the signals such as synchronizing signal, system information and control signaling is taken some measures, the application is with same
Description reduces the method that DC is disturbed exemplified by walking signal, but the method for this application is not limited to synchronizing signal, possible application to reduction DC
Interference to other signals and control signaling.
Embodiment one：
Fig. 4 be one embodiment of the invention provide a kind of synchronous signal receiver method principle flow chart, this method by with
Family equipment UE end performs, and the described method comprises the following steps：
Step 401, receive the synchronous letter that the frequency-region signal format information that base station is sent is default frequency-region signal format information
Number；
The signal format information of the synchronizing signal refers to the length of synchronous signal sequence, the length of synchronous signal sequence
It is even number or odd number, and the subcarrier shared by synchronous signal sequence.The signal format information of the synchronizing signal passes through
Agreement between base station and UE is made an appointment, and is presupposed information.
Step 402, the frequency domain position by searching for the definite synchronizing signal；
The frequency domain position information of the synchronizing signal refers to PRB numbers, these synchronization letters that synchronizing signal takes in frequency domain
Number take PRB frequency domain position, and these occupancy PRB in, synchronizing signal take subcarrier number, these synchronously believe
Number frequency domain position of the subcarrier in PRB taken.
Frequency domain position of the base station as transmitting terminal known synchronization signal, UE ends go out the synchronization of base station transmission by searching and detecting
The frequency domain position of signal.
Step 403, determine direct current carrier place subcarrier based on the relevant information in the synchronizing signal and broadcast channel
Positional information；
Relevant information in the broadcast channel includes Physical Resource Block and the direct current carrier institute at synchronizing signal frequency domain edge
Space-number between Physical Resource Block.
The positional information of subcarrier where step 404, frequency domain position information and direct current carrier based on the synchronizing signal,
Determine the frequency domain position of system bandwidth.
According to the frequency domain position of synchronizing signal and its corresponding information in broadcast channel, system bandwidth and synchronous letter are determined
Positional information number in system bandwidth, with the frequency domain position based on those information determining system bandwidth, consequently facilitating follow-up
Base station scheduling and resource allocation.
Optionally, subcarrier where determining direct current carrier based on the relevant information in the synchronizing signal and broadcast channel
Positional information, including following at least one method：
Pass through Physical Resource Block where the odd even and direct current carrier of the Physical Resource Block number in the bandwidth of synchronizing signal
The position of subcarrier where location determination direct current carrier；
The position of subcarrier where determining direct current carrier based on configured information, wherein, the configured information includes：System is believed
Breath or high-level signaling or physical layer signaling indicates respectively or the information of joint instructions.
Below by following several method to determining direct current based on the relevant information in the synchronizing signal and broadcast channel
The process of the positional information of subcarrier is further explained where carrier wave.
The Notification Method of DC carrier positions, the letter that receiving terminal is launched by agreement or transmitting terminal are described in the present embodiment
Order know receiving terminal receive data bandwidth it is interior whether there is DC carrier waves, during if there is DC carrier waves, the frequency domain of DC carrier waves
Position.Due to when carrying out PRB numberings, DC subcarriers be it is inclusive, such DC subcarriers be likely to be at PRB centre or
The edge of person PRB.For example, when the DC PRB numbers for being located in the center of system bandwidth and system bandwidth are even numbers, DC subcarriers position
In the edge of a PRB, as shown in Figure 5；When the PRB numbers that DC is located in the center of system bandwidth and system bandwidth are odd numbers,
DC subcarriers are located at the centre of a PRB, as shown in Figure 6.Alternatively, DC is not at system bandwidth center, in this way, receiving terminal is first
First it is to be understood that DC whether there is, if DC exists, it is understood that the position of PRB where DC is in the position of PRB, that is, DC, so
Afterwards, it is understood that DC is in the centre of PRB or the edge of PRB, if DC is among PRB, DC is to be in the 6th subcarrier
The 7th subcarrier is in, if DC is to be in PRB edges, DC is to be in the 12nd son in the 1st subcarrier to carry
Ripple.The above information can determine that either system information instruction is either configured or by physics by high-level signaling by agreement
Layer signaling instruction.
Method one：
Pass through Physical Resource Block where the odd even and direct current carrier of the Physical Resource Block number in the bandwidth of synchronizing signal
The position of subcarrier where location determination direct current carrier.Specifically, the position of definite DC is preset by agreement, according to system bandwidth
Or the PRB numbers in a default bandwidth (a such as default minimum bandwidth) determine the position of DC, for example, system bandwidth or
Include P PRB in the default bandwidth of person, then, PRB sequence numbers where DC (the wherein sequence number of PRB is numbered from 0, behind
PRB numberings be also in this way, not being described further) carry out the integer that lower rounding obtains for P/2, or (P-1)/2 take
Whole obtained integer, for example, system bandwidth includes 25 PRB, then the lower rounding of the PRB serial numbers 25/2 where DC is equal to 12,
That is DC is located at the center PRB positions of system bandwidth or a default bandwidth.
According to the PRB numbers in system bandwidth or a default bandwidth (a such as default minimum bandwidth) be even number also
It is odd number, determines that DC is located at the centre of PRB or the edge of PRB.When system bandwidth or a default bandwidth are (such as default
One minimum bandwidth) in PRB numbers when being even number, DC is located at the edge of PRB, it is first determined the PRB sequence numbers where DC, it is assumed that be
Commanding includes P PRB in a wide or default bandwidth, the PRB serial numbers P/2 where DC carry out lower rounding obtain it is whole
Number, or (P-1)/2 carry out the integer that lower rounding obtains, and selection one kind can be preset by agreement, when the PRB serial numbers where DC
P/2 carries out the integer that lower rounding obtains, and DC is located at the minimum subcarrier of PRB frequency domains；When the PRB serial numbers (P-1) where DC/
2 carry out the integer that lower rounding obtains, and DC is located at the highest subcarrier of PRB frequency domains.When system bandwidth or a default band
When PRB numbers in wide (a such as default minimum bandwidth) are odd numbers, DC is located at the centre of PRB, and DC is located at PRB serial numbers P/2
Carry out the integer that lower rounding obtains, and (subcarrier sequence number is opened from 0 positioned at the subcarrier of serial number M/2 (or M/2-1) in PRB
Begin numbering), it is a kind of that selection can be preset by agreement.
Method two：
The position of subcarrier where determining direct current carrier based on configured information, wherein, the configured information includes：System is believed
Breath or high-level signaling or physical layer signaling indicates respectively or the information of joint instructions.Specifically, system information or high-rise letter are passed through
Order or physical layer signaling instruction DC whether there is, true by system information or high-level signaling or physical layer signaling if DC exists
Determine the position of DC, the position of DC includes the sequence number of the subcarrier of the sequence number and DC of DC places PRB in the PRB of place.Wherein DC
It whether there is, the PRB sequence numbers where DC, DC are among PRB or the edge of PRB is by system information (or high-level signaling or thing
Reason layer signaling) indicate respectively or joint instructions.
Describe that DC whether there is, the PRB sequence numbers where DC, DC are among PRB or the edge of PRB is believed by system first
Breath (or high-level signaling or physical layer signaling) indicates respectively, for example, indicating that DC is configured with the presence or absence of receiving terminal by 1 bit information
Bandwidth in DC whether there is, information indicated value " 0 " represents that no DC exists, and information indicated value " 1 " represents that DC exists.
For example, the PRB sequence numbers by the instruction of N-bit information in the bandwidth that receiving terminal configures where DC, N is (for example, N etc.
The correspondence of PRB sequence numbers is as shown in table 1 where 2) bit information indicated value and DC.
The correspondence of 1 bit information indicated value of table and DC places PRB sequence numbers
For example, indicating that DC is the centre at the edge of PRB or PRB by 1 bit information, information indicated value " 0 " represents
For DC among PRB, information indicated value " 1 " represents DC at PRB edges.When DC is located among PRB, DC is located at serial number in PRB
The subcarrier (subcarrier sequence number is numbered from 0) of M/2 (or M/2-1) is determined by agreement, for example, agreement determines that DC is located at
Serial number M/2 in PRB.When DC is located at PRB edges, DC is located at subcarrier (the PRB neutrons of serial number 0 (or M-1) in PRB
Carrier wave sequence number is numbered from 0, and M is the number of a PRB sub-carriers) determined by agreement, for example, agreement determines that DC is located at
Serial number 0 in PRB.
Describe that DC whether there is, the PRB sequence numbers where DC, DC are among PRB or the edge of PRB is believed by system below
Cease (or high-level signaling or physical layer signaling) joint instructions.
For example, by N-bit information instruction receiving terminal configure bandwidth in DC whether there is, the PRB sequence numbers where DC,
DC is in PRB centres or the edge of PRB, and N (for example, N is equal to 3) bit information indicated value and DC whether there is, where DC
PRB sequence numbers, DC are in PRB centres or the edge correspondence of PRB is as shown in table 2.
2 bit information indicated value of table and DC whether there is, the PRB sequence numbers where DC, DC are among PRB or PRB
The correspondence at edge
In order to by the position of subcarrier where the location determination direct current carrier of Physical Resource Block where direct current carrier, first
It needs to be determined that the position of Physical Resource Block where direct current carrier, can specifically be determined by following several method：
In the present embodiment, by the PRB outside the PRB that the position of synchronizing signal is placed on where DC, that is to say, that
Ensure that the PRB for sending synchronizing signal is not overlapping with the PRB comprising DC.When synchronizing signal is not located at the centre position of system bandwidth
When, UE is after synchronizing signal is received, it is not known that the centre frequency position of system bandwidth.Therefore, UE is by receiving synchronizing signal,
The PRB of synchronous signal transmission is have found, the position of DC is then determined according to the correspondence of synchronizing signal and DC on frequency domain.Pass
Correspondence of the PRB positions of defeated synchronizing signal with DC on frequency domain has following several method to determine.
Method one：
Correspondence of the PRB positions of synchronous signal transmission with DC on frequency domain is default, is determined by agreement, example
Such as, being separated by N between PRB where the PRB and DC at synchronous signal transmission frequency domain edge, (N is integer, is determined by agreement, and N is positive integer
The frequency domain edge of PRB low frequencies of synchronous signal transmission can be located at by representing DC, at intervals of N number of PRB, as shown in Figure 7；N is negative whole
Number represents the frequency domain edges that DC can be located at the PRB high frequencies of synchronous signal transmission, at intervals of N number of PRB) a PRB, DC can be located at
The frequency domain edge of the PRB low frequencies of synchronous signal transmission, DC can also be located at the frequency domain edge of the PRB high frequencies of synchronous signal transmission.
Method two：
The PRB positions of synchronous signal transmission and correspondences of the DC on frequency domain are indicated by system information, for example,
Indicated by Master Information Block (MIB, Master Information Block), the M-bit in MIB is used to refer to, and M-bit claims
For synchronizing signal position configured information, it is separated by N between PRB where the PRB and DC at synchronous signal transmission frequency domain edge, for example, M etc.
Pair of N is spaced between 2, synchronizing signal position configured information value and PRB and DC the place PRB at synchronous signal transmission frequency domain edge
It should be related to as shown in table 3.N1, N2, N3, N4 therein can be positive integer and negative integer, and positive integer, which represents DC, can be located at biography
The frequency domain edge of the PRB low frequencies of defeated synchronizing signal, negative integer represent the frequency domain that DC can be located at the PRB high frequencies of synchronous signal transmission
Edge.
Phase between 3 synchronizing signal position configured information value of table and PRB where the PRB and DC at synchronous signal transmission frequency domain edge
Every the correspondence of N
Method three：
The PRB positions of synchronous signal transmission and correspondences of the DC on frequency domain are indicated by system information, for example,
Indicated by Master Information Block (MIB, Master Information Block), whole system bandwidth is divided into M definite son
Band (number of subband determined by agreement, or the number of subband is determined that system bandwidth is indicated by MIB by system bandwidth), transmission
In the subband that all PRB of synchronizing signal are located therein, the bit of the number of rounding is used to refer on (log2M) in MIB
Show all PRB of synchronous signal transmission in which of M subband subband, M-bit is known as synchronizing signal position instruction
Information.For example, M is equal to 4, it is necessary to (log24) pit synchronization signal position indication information.Since DC is where synchronizing signal PRB
Position on subband is fixed, therefore the position of DC can be determined by the positions of PRB subbands.Wherein, synchronizing signal position
Configured information value and the correspondence of the subband where synchronizing signal PRB are as shown in table 4.
4 synchronizing signal position configured information value of table and the correspondence of the subband where synchronizing signal PRB
| Synchronizing signal position configured information value | Subband where synchronizing signal PRB |
| 00 | 1 |
| 01 | 2 |
| 10 | 3 |
| 11 | 4 |
Method four：
The PRB positions of synchronous signal transmission and correspondence of the DC subcarriers on frequency domain be by PSS sequences used and/
Or SSS sequences indicate.For example, indicated by PSS sequences.To the PSS sequence of packets of cell-specific, each PSS sequence pairs
Answer offset of the different synchronizing channel frequency ranges for PRB where DC.One specific example is that each cell distributes 4 PSS
Sequence, PRB where subband lowest frequency PRB and DC where PSS sequences 0 correspond to synchronizing signal are separated by 0 PRB, and PSS sequences 1 correspond to
PRB where subband lowest frequency PRB and DC where synchronizing signal is separated by 1 PRB, and subband where PSS sequences 3 correspond to synchronizing signal is most
PRB where high frequency PRB and DC is separated by 0 PRB, PRB where subband most high frequency PRB and DC where PSS sequences 4 correspond to synchronizing signal
It is separated by 1 PRB.
Another way is, different by different SSS sequences implicit indications still using the PSS sequences of cell-specific
Synchronizing channel frequency range for PRB where DC offset.
It should be noted that above two mode can be used in combination, i.e., indicated by PSS sequences and SSS sequence associations same
Walk offset of the channel bands for PRB where DC.
Embodiment two：
Fig. 8 be another embodiment of the present invention provide a kind of method for transmitting synchronizing signal principle flow chart, this method by
Base station end performs, and the described method comprises the following steps：
Step 801, the position according to direct current carrier place subcarrier, determine the frequency domain position of synchronizing signal；
The position of subcarrier where base station determines direct current carrier first, the position of subcarrier where then avoiding direct current carrier
Put, other subcarriers are determined as to the frequency domain position of synchronizing signal, to send synchronizing information to UE.Specifically, the synchronous letter
Number frequency domain position include synchronizing signal is taken in system frequency domain Physical Resource Block number, occupancy each Physical Resource Block frequency
Domain position, synchronizing signal take subcarrier number, take each subcarrier the occupancy physical resource frequency domain in the block
Position
Step 802, frequency domain position is arranged to the definite frequency domain position for transmission and frequency-region signal format information is set
For the synchronizing signal of default frequency domain format information.
The synchronizing signal that the base station is sent is identical with the frequency-region signal form of the UE synchronizing signals received, passes through agreement
About it is set to default.Specifically, the frequency-region signal format information of the synchronizing signal includes the length of synchronous signal sequence, synchronous letter
Number sequence length is odd number value or even number value and the subcarrier shared by synchronous signal sequence.
Further, the method further includes：The relevant information or system information in broadcast channel are sent to UE, wherein,
The relevant information or system information include at least one of：The Physical Resource Block and direct current at synchronous signal transmission frequency domain edge
The instruction of subband where the configured information of the space-number between Physical Resource Block where carrier wave, synchronizing signal Physical Resource Block
Information.
Wherein, the Physical Resource Block for being used for transmission synchronizing signal frequency domain edge and the physics where direct current carrier
Space-number between resource block is positive integer or negative integer.The positive integer represents that direct current carrier is located at the thing of synchronous signal transmission
The frequency domain edge of resource block low frequency is managed, the negative integer represents that direct current carrier is located at the Physical Resource Block high frequency of synchronous signal transmission
Frequency domain edge.
Wherein, described in the step 801 according to the position of subcarrier where direct current carrier, the frequency domain of synchronizing signal is determined
Position, including：Adjust makes the center of synchronizing signal vacant as the number of the subcarrier of protection band, and the center is true
It is set to the position of direct current carrier subcarrier.It is described as follows：
In the present embodiment, by synchronizing signal being placed on the centre position of system bandwidth, then the subcarrier of DC is uncomfortable
Synchronization signal data processed, for example, synchronizing signal takes N number of PRB, (for example, L is equal to 12, i.e. a PRB includes 12 sons and carries N*L
Ripple) a subcarrier, wherein, K sub- carrier-wave transmission synchronization signal datas, N*L-K-1 subcarrier is for doing protection band, a son
Carrier wave is DC subcarriers, the not synchronous signal transmission data so on DC subcarriers.At present in LTE synchronous signal sequence length
For 62, the length K of synchronous signal sequence can be even number in the application, such as the synchronous signal sequence with present LTE, or at double
Repetition.At this moment the number that synchronous signal sequence both sides are used for the subcarrier as protection band is different, the protection band on one side
It is (N*L-K)/2, the protection band of another side is (N*L-K)/2-1, as shown in Figure 9.The length K of synchronous signal sequence in the application
It can also be odd number, such as produce new synchronous signal sequence.At this moment synchronous signal sequence both sides are used for the son as protection band
The number of carrier wave is identical, and the protection band on both sides is (N*L-K-1)/2, as shown in Figure 10.So UE recognizes in cell searching
It is DC subcarriers for the subcarrier among system bandwidth, and cell searching is carried out without the situation of synchronous signal transmission sequence.This
Sample, can be to avoid interference of the DC to synchronizing signal.
Or base station is not placed on synchronizing signal in the centre position of system bandwidth, still, base station is in synchronous signal transmission
When, the bandwidth that base station is placed on synchronizing signal centered on synchronizing signal (by agreement preset, such as default one by this bandwidth
What a all UE were supported most descends bandwidth) in, middle subcarrier in this bandwidth not synchronous signal transmission data, for example, together
Signal occupancy N number of PRB, N*L (for example, L is equal to 12, i.e. a PRB includes 12 subcarriers) a subcarrier is walked, wherein, K son
Carrier-wave transmission synchronization signal data, N*L-K-1 subcarrier are used to do protection band, and a subcarrier is DC subcarriers, is so existed
Not synchronous signal transmission data on DC subcarriers.The length of synchronous signal sequence is 62 in LTE at present, synchronizing signal in the application
The length K of sequence can be even number, such as the synchronous signal sequence with present LTE, or repetition at double.At this moment synchronizing signal sequence
The number that row both sides are used for the subcarrier as protection band is different, and the protection band on one side is (N*L-K)/2, the guarantor of another side
Protecting band is (N*L-K)/2-1.The length K of synchronous signal sequence can be odd number in the application, such as produce new synchronizing signal
Sequence.At this moment the number that synchronous signal sequence both sides are used for the subcarrier as protection band is identical, and the protection band on both sides is
(N*L-K-1)/2.So UE only receives the data of the subcarrier in this pre-set bandwidths, receiving terminal when carrying out cell searching
DC subcarriers be exactly middle subcarrier in pre-set bandwidths, and this DC subcarrier does not have the situation of synchronous signal transmission sequence
Carry out cell searching.This way it is possible to avoid interference of the DC to synchronizing signal, as shown in figure 11.
Embodiment three：
Shown in Figure 12, present invention also offers a kind of synchronous signal receiver device, which can be used for realizing real
Apply one the method for example, including receiving module 121, the first determining module 122, the second determining module 123, the 3rd determining module
124, wherein,
Receiving module：Frequency-region signal format information for receiving base station transmission is the same of default frequency-region signal format information
Walk signal；
First determining module：For determining the frequency domain position of the synchronizing signal by searching for；
Second determining module：For determining direct current carrier institute based on the relevant information in the synchronizing signal and broadcast channel
In the positional information of subcarrier；
3rd determining module：For subcarrier where frequency domain position information and direct current carrier based on the synchronizing signal
Positional information, determines the frequency domain position of system bandwidth.
In the solution of the present invention, the concrete function of each module is realized in the synchronous signal receiver device that embodiment three provides,
The specific steps of the synchronous signal receiver method of the offer of embodiment one are referred to, this will not be detailed here.
Example IV：
Shown in Figure 13, present invention also offers a kind of synchronizing signal dispensing device, which can be used for realizing real
Two the method for example, including determining module 131, sending module 132 are applied, wherein,
Determining module：For determining the frequency domain position information of synchronizing signal；
Sending module：Frequency domain position is arranged to the definite frequency domain position and frequency-region signal format information for sending
It is arranged to the synchronizing signal of default frequency domain format information.
In the solution of the present invention, the concrete function of each module is realized in the synchronizing signal dispensing device that example IV provides,
The specific steps of the method for transmitting synchronizing signal of the offer of embodiment two are referred to, this will not be detailed here.
The above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (18)
- A kind of 1. synchronous signal receiver method, it is characterised in that comprise the following steps：Receive the synchronizing signal that the frequency-region signal format information that base station is sent is default frequency-region signal format information；The frequency domain position of the synchronizing signal is determined by searching for；The positional information of subcarrier where determining direct current carrier based on the relevant information in the synchronizing signal and broadcast channel；The positional information of subcarrier, determines system bandwidth where frequency domain position information and direct current carrier based on the synchronizing signal Frequency domain position.
- 2. according to the method described in claim 1, it is characterized in that, the frequency domain position of the synchronizing signal exists including synchronizing signal The son load that the Physical Resource Block number of system frequency domain occupancy, the frequency domain position of each Physical Resource Block taken, synchronizing signal take Ripple number, take each subcarrier the occupancy physical resource frequency domain position in the block.
- 3. according to the method described in claim 1, it is characterized in that, the frequency-region signal format information of the synchronizing signal is included together Length, the synchronous signal sequence length of step signal sequence are odd number value or even number value and the son shared by synchronous signal sequence Carrier wave.
- 4. according to the method described in claim 1, it is characterized in that, based on synchronizing signal letter related in broadcast channel The positional information of subcarrier where breath determines direct current carrier, including following at least one method：Pass through the position of Physical Resource Block where the odd even and direct current carrier of the Physical Resource Block number in the bandwidth of synchronizing signal The position of subcarrier where determining direct current carrier；The position of subcarrier where determining direct current carrier based on configured information, wherein, the configured information includes：System information or High-level signaling or physical layer signaling indicate respectively or the information of joint instructions.
- 5. according to the method described in claim 4, it is characterized in that, the position of Physical Resource Block passes through where the direct current carrier Following at least one mode determines：The Physical Resource Block and direct current carrier for being used for transmission synchronizing signal frequency domain edge are obtained by relevant information in broadcast channel Space-number between the Physical Resource Block at place, determines directly according to the frequency location of bandwidth where the space-number and synchronizing signal The position of Physical Resource Block where flowing carrier wave；Thing where the Physical Resource Block for being used for transmission synchronizing signal frequency domain edge and direct current carrier based on system information instruction The space-number between resource block is managed, the position of Physical Resource Block where determining direct current carrier；Subband where synchronizing signal Physical Resource Block based on system information instruction and default it is used for transmission synchronizing signal The space-number between Physical Resource Block where the Physical Resource Block and direct current carrier at frequency domain edge, determines thing where direct current carrier Manage the position of resource block；Frequency range is relative to direct current carrier where the synchronizing signal indicated based on master sync signal sequence and/or auxiliary synchronous signals sequence The offset of place Physical Resource Block, the position of Physical Resource Block where determining direct current carrier.
- 6. according to the method described in claim 4, it is characterized in that, it is used for transmission the Physical Resource Block at synchronizing signal frequency domain edge Space-number between the Physical Resource Block where direct current carrier is positive integer or negative integer.
- 7. according to the method described in claim 6, it is characterized in that, the positive integer represents direct current carrier positioned at the synchronous letter of transmission Number Physical Resource Block low frequency frequency domain edge, the negative integer represents that direct current carrier is located at the physical resource of synchronous signal transmission The frequency domain edge of block high frequency.
- 8. according to the method described in claim 4, it is characterized in that, subcarrier where determining direct current carrier based on configured information Position, including：Configured information letter related to direct current carrier in the system information or high-level signaling or physical layer signaling Correspondence between breath, determines the position of direct current carrier.
- 9. according to the method described in claim 8, it is characterized in that, whether the direct current carrier relevant information includes direct current carrier The centre or edge of Physical Resource Block where being in it in the presence of the Physical Resource Block sequence number where, direct current carrier, direct current carrier.
- 10. a kind of method for transmitting synchronizing signal, it is characterised in that comprise the following steps：The position of subcarrier according to where direct current carrier, determines the frequency domain position of synchronizing signal；Frequency domain position is arranged to the definite frequency domain position for transmission and frequency-region signal format information is arranged to default frequency domain The synchronizing signal of format information.
- 11. according to the method described in claim 10, it is characterized in that, the frequency domain position of the synchronizing signal includes synchronizing signal The son that Physical Resource Block number, the frequency domain position of each Physical Resource Block taken, the synchronizing signal taken in system frequency domain takes Variable number, take each subcarrier the occupancy physical resource frequency domain position in the block.
- 12. according to the method described in claim 10, it is characterized in that, the frequency-region signal format information of the synchronizing signal includes Length, the synchronous signal sequence length of synchronous signal sequence are shared by odd number value or even number value and synchronous signal sequence Subcarrier.
- 13. according to the method described in claim 10, it is characterized in that, according to the position of direct current carrier place subcarrier, determine The frequency domain position of synchronizing signal, including：Adjust makes the center of synchronizing signal vacant as the number of the subcarrier of protection band, which is determined as directly Flow the position of carrier wave subcarrier.
- 14. according to the method described in claim 10, it is characterized in that, the method further includes：To UE send broadcast channel in relevant information or system information, wherein, the relevant information or system information include with It is at least one lower：Between between Physical Resource Block where the Physical Resource Block and direct current carrier at synchronous signal transmission frequency domain edge Every the configured information of the subband where several configured informations, synchronizing signal Physical Resource Block.
- 15. according to the method for claim 14, it is characterised in that be used for transmission the physical resource at synchronizing signal frequency domain edge The space-number between Physical Resource Block where block and direct current carrier is positive integer or negative integer.
- 16. according to the method for claim 15, it is characterised in that the positive integer represents that direct current carrier is synchronous positioned at transmission The frequency domain edge of the Physical Resource Block low frequency of signal, the negative integer represent that direct current carrier is located at the physics money of synchronous signal transmission The frequency domain edge of source block high frequency.
- A kind of 17. synchronous signal receiver device, it is characterised in that including：Receiving module：Frequency-region signal format information for receiving base station transmission is the synchronous letter of default frequency-region signal format information Number；First determining module：For determining the frequency domain position of the synchronizing signal by searching for；Second determining module：For son where determining direct current carrier based on the relevant information in the synchronizing signal and broadcast channel The positional information of carrier wave；3rd determining module：Position for subcarrier where frequency domain position information and direct current carrier based on the synchronizing signal Information, determines the frequency domain position of system bandwidth.
- A kind of 18. synchronizing signal dispensing device, it is characterised in that including：Determining module：For the position according to subcarrier where direct current carrier, the frequency domain position information of synchronizing signal is determined；Sending module：Frequency domain position is arranged to the definite frequency domain position and the setting of frequency-region signal format information for sending For the synchronizing signal of default frequency domain format information.
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