CN106998247A - The method and the network equipment of a kind of transmission of reference signals - Google Patents
The method and the network equipment of a kind of transmission of reference signals Download PDFInfo
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- CN106998247A CN106998247A CN201610045960.9A CN201610045960A CN106998247A CN 106998247 A CN106998247 A CN 106998247A CN 201610045960 A CN201610045960 A CN 201610045960A CN 106998247 A CN106998247 A CN 106998247A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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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
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The invention discloses a kind of method of transmission of reference signals and the network equipment；Wherein, methods described includes：The corresponding reference signals of a Transmission Time Interval TTI are determined in the way of default mode and/or enhanced base station eNB instructions.
Description
Technical field
The present invention relates to the method and the network equipment of wireless communication field, more particularly to a kind of transmission of reference signals.
Background technology
The fast development of mobile Internet and Internet of Things triggered data traffic explosive growth and variation,
The extensive rise of differentiated service.5G will support higher as the mobile communication technology of a new generation with respect to 4G
Speed (Gbps), flood tide link (1M/Km2), ultralow time delay (1ms), higher reliability, hundred times
Energy efficiency lifting etc. to support new changes in demand.Wherein, ultralow time delay as 5G technologies key
Index, directly affects such as car networking, industrial automation, remote control, intelligent grid Delay Constraint industry
The development of business.A series of current research on standards reduced on 5G time delays are just in iterative method.
Transmission Time Interval (TTI, Transmission Time Interval) reduction is reduced as current time delay
Important research direction, it is intended to the TTI of present 1ms length is reduced to even 1~2 OFDM of 0.5ms and accorded with
Number length, at double reduce minimum scheduling time, and then also can be at double in the case of frame structure is not changed
Reduction single transmission time delay.At present, 3GPP has set up the project under the short TTI of discussion in RAN1 and RAN2
System design.Under short TTI scenes, existing LTE reference signal design has been no longer appropriate for, especially
In the case where TTI length is shorter, some TTI may be without corresponding DMRS.In correlation technique,
There is presently no the solution of the reference signal for short TTI.
The content of the invention
In view of this, the embodiment of the present invention desirable to provide a kind of transmission of reference signals method and the network equipment,
It solve at least prior art and there is problem, realize the reference signal transmission for short TTI.
What the technical scheme of the embodiment of the present invention was realized in：
A kind of method of transmission of reference signals of the embodiment of the present invention, methods described includes：
A Transmission Time Interval is determined in the way of default mode and/or enhanced base station eNB instructions
The corresponding reference signals of TTI.
In such scheme, methods described includes：
Information in the TTI is parsed according to the reference signal, the TTI is less than first threshold.
In such scheme, methods described also includes：
It is transmitted on a symbol where the reference signal, the reference signal is by N number of sequence group
Into wherein N is the integer more than 1.
In such scheme, the length of N number of sequence is default length or the length of eNB notices.
In such scheme, the length of N number of sequence is determined by least one of：
Frequency domain dispatching granularity；
The frequency domain density of the reference signal；
The corresponding resource of the reference signal.
In such scheme, the length of each sequence is one below in N number of sequence：
R × 12 × p/k, k × 12 × p × G；
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of the reference signal,
G is frequency domain dispatching granularity, and unit is PRB, and k is positive integer.
In such scheme, methods described also includes：
The reference signal is transmitted on the specified subcarrier in a symbol, and the specified subcarrier is
The subcarrier that default subcarrier or eNB are notified.
In such scheme, the specified subcarrier is determined by least one of：
TTI indexes；
Cell ID；
UE is identified；
Wireless frame index/subframe index/time slot index.
In such scheme, methods described also includes：
When two or more TTI have superimposed symbols, the reference signal is one or more described overlapping
It is transmitted on symbol.
In such scheme, methods described also includes：
When n TTI is one group, the reference signal of the n TTI is in one or more default symbol
On be transmitted, wherein, the n is integer more than 1.
In such scheme, the n TTI is all TTI in a subframe, or on a time slot
All TTI.
In such scheme, methods described also includes：
The reference signal is transmitted on the TTI of transmission information and on the TTI adjacent with the TTI.
In such scheme, methods described also includes：
The reference signal is sent according to transmission mode and/or device type or according to eNB instruction.
In such scheme, methods described also includes：
When the reference signal includes multiple layers, be between different layers by the way of frequency division and code division, or
The mode of frequency division is transmitted.
A kind of network equipment of the embodiment of the present invention, the network equipment includes：
Indicating mode acquiring unit, for obtaining the side that default mode and/or enhanced base station eNB are indicated
Formula；
Signal transmits determining unit, in the way of the default mode and/or eNB instructions
Determine the corresponding reference signals of a Transmission Time Interval TTI.
In such scheme, the network equipment also includes：
Resolution unit, for parsing the information in the TTI according to the reference signal, the TTI is less than
First threshold.
In such scheme, the network equipment also includes：
Signal transmission unit, for being transmitted on a symbol where the reference signal, the ginseng
Examine signal to be made up of N number of sequence, wherein N is the integer more than 1.
In such scheme, the length of N number of sequence is default length or the length of eNB notices.
In such scheme, the length of N number of sequence is determined by least one of：
Frequency domain dispatching granularity；
The frequency domain density of the reference signal；
The corresponding resource of the reference signal.
In such scheme, the length of each sequence is one below in N number of sequence：
R × 12 × p/k, k × 12 × p × G；
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of the reference signal,
G is frequency domain dispatching granularity, and unit is PRB, and k is positive integer.
In such scheme, the network equipment also includes：
The reference signal is transmitted on the specified subcarrier in a symbol, and the specified subcarrier is
The subcarrier that default subcarrier or eNB are notified.
In such scheme, the specified subcarrier is determined by least one of：
TTI indexes；
Cell ID；
UE is identified；
Wireless frame index/subframe index/time slot index.
In such scheme, the network equipment also includes：
Signal transmission unit, for when two or more TTI have superimposed symbols, the reference signal to be one
It is transmitted on individual or multiple described superimposed symbols.
In such scheme, the network equipment also includes：
Signal transmission unit, for when n TTI is one group, the reference signal of the n TTI to be pre-
If one or more symbol on be transmitted, wherein, the n is integer more than 1.
In such scheme, the n TTI is all TTI in a subframe, or on a time slot
All TTI.
In such scheme, the network equipment also includes：
Signal transmission unit, for the network equipment transmission information TTI on and with the TTI phases
The reference signal is transmitted on adjacent TTI.
In such scheme, the network equipment also includes：
Signal transmission unit, for the network equipment according to transmission mode and/or device type or according to
ENB instruction sends the reference signal.
In such scheme, the network equipment also includes：
Signal transmission unit, for being using frequency between different layers when the reference signal includes multiple layers
The mode with code division, or the mode of frequency division is divided to be transmitted.
In such scheme, the network equipment includes terminal or base station.
A kind of method of transmission of reference signals of the embodiment of the present invention includes：According to default mode and/or enhancing
The mode that type base station eNB is indicated determines the corresponding reference signals of a Transmission Time Interval TTI.Using this hair
Bright embodiment, by the network equipment (terminal or base station) according to default mode and/or enhanced base station eNB
The mode of instruction determines the corresponding reference signals of a Transmission Time Interval TTI, realizes for short TTI's
Reference signal transmission, the embodiment of the present invention is not limited to the application scenarios for short TTI reference signal transmissions, also
Suitable for the application scenarios of long TTI reference signal transmissions.
Brief description of the drawings
Fig. 1 is the implementation process schematic diagram of the embodiment of the present invention one；
Fig. 2 constitutes structural representation for the network equipment of the embodiment of the present invention two；
Fig. 3-7 is corresponding reference signal schematic diagram in Application Example one of the present invention, two TTI；
Fig. 8-9 is corresponding reference signal schematic diagram in the TTI of Application Example three of the present invention；
Figure 10 is corresponding reference signal schematic diagram in the TTI of Application Example four of the present invention；
Figure 11-12 is corresponding reference signal schematic diagram in the TTI of Application Example five of the present invention；
Figure 13 is corresponding reference signal schematic diagram in the TTI of Application Example six of the present invention.
Embodiment
The implementation to technical scheme is described in further detail below in conjunction with the accompanying drawings.
Embodiment one：
The method of a kind of transmission of reference signals of the embodiment of the present invention, as shown in figure 1, methods described includes：
Step 101, the network equipment are determined in the way of default mode and/or enhanced base station eNB instructions
The corresponding reference signals of one Transmission Time Interval TTI.
Here, the network equipment includes terminal or base station.
Step 102, the information in the reference signal parsing TTI, the TTI are less than first
Threshold value.
Here, the TTI can be short transmission time interval, such as less than 12 or 14 symbols, this hair
Bright embodiment is applied to the application scenarios of short TTI reference signal transmissions, and the embodiment of the present invention is not limited to be directed to
The application scenarios of short TTI reference signal transmissions, apply also for the application scenarios of long TTI reference signal transmissions,
The TTI can also be long Transmission Time Interval, such as more than or equal to 12 or 14 symbols.
In the embodiment of the embodiment of the present invention one, methods described also includes：
It is transmitted on a symbol where the reference signal, the reference signal is by N number of sequence group
Into wherein N is the integer more than 1.
In the embodiment of the embodiment of the present invention one, the length of N number of sequence for default length or
The length that eNB is notified.
In the embodiment of the embodiment of the present invention one, the length of N number of sequence is determined by least one of：
Frequency domain dispatching granularity；
The frequency domain density of the reference signal；
The corresponding resource of the reference signal.
In the embodiment of the embodiment of the present invention one, in N number of sequence the length of each sequence for it is following it
One：
R × 12 × p/k, k × 12 × p × G；
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of the reference signal,
G is frequency domain dispatching granularity, and unit is PRB, and k is positive integer.The PRB numbers are suitable for LTE systems
The PRB numbers of system.
In the embodiment of the embodiment of the present invention one, methods described also includes：
The reference signal is transmitted on the specified subcarrier in a symbol, and the specified subcarrier is
The subcarrier that default subcarrier or eNB are notified.
In the embodiment of the embodiment of the present invention one, the specified subcarrier is determined by least one of：
TTI indexes；
Cell ID；
UE is identified；
Wireless frame index/subframe index/time slot index.
In the embodiment of the embodiment of the present invention one, methods described also includes：
When two or more TTI have superimposed symbols, the reference signal is one or more described overlapping
It is transmitted on symbol.
In the embodiment of the embodiment of the present invention one, methods described also includes：
When n TTI is one group, the reference signal of the n TTI is in one or more default symbol
On be transmitted, wherein, the n is integer more than 1.
In the embodiment of the embodiment of the present invention one, the n TTI is all TTI in a subframe,
Or be all TTI on a time slot.
In the embodiment of the embodiment of the present invention one, methods described also includes：
The network equipment on the TTI of transmission information and on the TTI adjacent with the TTI transmission it is described
Reference signal.
In the embodiment of the embodiment of the present invention one, methods described also includes：
The network equipment is according to transmission mode and/or device type or according to being sent eNB instruction
Reference signal.
In the embodiment of the embodiment of the present invention one, methods described also includes：
When the reference signal includes multiple layers, be between different layers by the way of frequency division and code division, or
The mode of frequency division is transmitted.
Embodiment two：
A kind of network equipment of the embodiment of the present invention, as shown in Fig. 2 the network equipment includes：
Indicating mode acquiring unit 11, is indicated for obtaining default mode and/or enhanced base station eNB
Mode；And signal transmission determining unit 12, for according to the default mode and/or eNB instructions
Mode determine the corresponding reference signals of a Transmission Time Interval TTI；And resolution unit 13, for basis
The reference signal parses the information in the TTI, and the TTI is less than first threshold.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
Signal transmission unit, for being transmitted on a symbol where the reference signal, the ginseng
Examine signal to be made up of N number of sequence, wherein N is the integer more than 1.
In the embodiment of the embodiment of the present invention one, the length of N number of sequence for default length or
The length that eNB is notified.
In the embodiment of the embodiment of the present invention one, the length of N number of sequence is determined by least one of：
Frequency domain dispatching granularity；
The frequency domain density of the reference signal；
The corresponding resource of the reference signal.
In the embodiment of the embodiment of the present invention one, in N number of sequence the length of each sequence for it is following it
One：
R × 12 × p/k, k × 12 × p × G；
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of the reference signal,
G is frequency domain dispatching granularity, and unit is PRB, and k is positive integer.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
The reference signal is transmitted on the specified subcarrier in a symbol, and the specified subcarrier is
The subcarrier that default subcarrier or eNB are notified.
In the embodiment of the embodiment of the present invention one, the specified subcarrier is determined by least one of：
TTI indexes；
Cell ID；
UE is identified；
Wireless frame index/subframe index/time slot index.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
Signal transmission unit, for when two or more TTI have superimposed symbols, the reference signal to be one
It is transmitted on individual or multiple described superimposed symbols.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
Signal transmission unit, for when n TTI is one group, the reference signal of the n TTI to be pre-
If one or more symbol on be transmitted, wherein, the n is integer more than 1.
In the embodiment of the embodiment of the present invention one, the n TTI is all TTI in a subframe,
Or be all TTI on a time slot.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
Signal transmission unit, for the network equipment transmission information TTI on and with the TTI phases
The reference signal is transmitted on adjacent TTI.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
Signal transmission unit, for the network equipment according to transmission mode and/or device type or according to
ENB instruction sends the reference signal.
In the embodiment of the embodiment of the present invention one, the network equipment also includes：
Signal transmission unit, for being using frequency between different layers when the reference signal includes multiple layers
The mode with code division, or the mode of frequency division is divided to be transmitted.
In the embodiment of the embodiment of the present invention one, the network equipment includes：Terminal or base station.
The embodiment of the present invention is described below by taking a practical application scene as an example：
It is exemplified below using multiple application scenarios of the embodiment of the present invention, these application scenarios are suitable for short
The transmission plan of reference signal under TTI, still, the embodiment of the present invention are applicable not only to for short TTI ginsengs
The application scenarios of signal transmission are examined, the application scenarios of long TTI reference signal transmissions are applied also for,
Application Example one：
The present embodiment provides a kind of method for sending reference signal.The method provided in the present embodiment can be used for upper
OK, it can also be used to descending.The reference signal is generated on frequency domain by multiple sequences.Wherein, the symbol
It can be OFDM symbol, or be SC-FDMA symbols.The sequence can be ZC sequences, or
Other sequences, such as DFT sequence, wash sequences etc..The present embodiment is not limited.The multiple sequence can
, can also be different with identical.The length of the sequence can be with identical, can also be different.
Illustrate in the present embodiment by taking DMRS as an example, be not limited to be applied to DMRS in practical application, also may be used
For other reference signals.
An example is given below.Assuming that in LTE system, the PUSCH resources for distributing to UE are m
Individual PRB, wherein m are even number.On a symbol where DMRS, DMRS takes m PRB,
The m-1 assuming that its index is 0,1,2 ... ..., then, DMRS sequences are on frequency domain by less than two sequences
Composition：
Wherein, αλFor cyclic shift,WhereinAccounted for for PUSCH
The number of subcarrier, i.e.,During resource impact, above-mentioned sequence is respectively mapped to
PRB#0~m/2-1 and m/2~m-1.The example of a resource impact is provided in Fig. 3.Wherein, m=2,
The sequential value in 24 subcarriers that 2 PRB pairs are answered is given in Fig. 3.DMRS sequences are by two 12
Long sequence composition, the sequential values of 12 length are r0, r1 ..., r11.
Alternatively, it is made up of on DMRS frequency domains multiple fixed long sequences, the length of the sequence is M.
Preferably, M is obtained by frequency domain dispatching granularity.Such as, ascending resource partition size is 2 PRB.If
When the PUSCH that eNB distributes to UE is 6 PRB, UE is in 6 PRB, from minimum PRB
Start, each two PRB generates the sequence of one 24 length.DMRS is on frequency domain by 3 24 ZC grown
Sequence is constituted.3 ZC sequences can be the same or different.The benefit so done is, when
Two UE DMRS takes same-sign, when the resource of distribution has overlapping but not exclusively overlapping, both
DMRS can accomplish orthogonal.When the UE resources distributed are 2 PRB, UE uses existing mode
Formation sequence, the sequence of as one 24 length.Such as in short TTI, in order to save opening for DMRS
Pin, can be with overlapping before former and later two TTI, and DMRS is sent on overlapping symbol, as shown in Figure 4.
Each TTI is 3 symbols, and the symbol of grey is overlapping symbol, and DMRS is sent on overlapping symbol.
In practical application, the symbolic number that TTI includes can for it is arbitrarily large in 1 and less than 14 positive integer.Compare
TTI does not have a mode for having DMRS in overlapping and each TTI, and two TTI have overlapping mode can be with
While TTI length is reduced, DMRS expense is reduced.Alternatively, two TTI symbolic number also may be used
With difference, such as one TTI takes symbol #0~3 of a subframe, and another TTI takes the subframe
Symbol #0~6, here symbol index it is identical with the definition in existing LTE, then the two TTI's
DMRS can be sent on symbol #3.Described two TTI DMRS is code division.
In Fig. 4, if TTI#0 UE PUSCH takes the one of PRB#0~7, TTI#1
Individual UE PUSCH takes PRB#6~9, and both have overlapping on PRB#6 and 7.If two UE
DMRS be two long sequences for taking distribution resource, then in PRB#6 and 7, both DMRS is
Non-orthogonal, it can interfere, influence demodulation performance.If UE DMRS is every 2 PRB generations
One ZC sequence, then on PRB#6 and 7, eNB can be caused by distributing different cyclic shifts
Both DMRS are orthogonal, and demodulation performance is good.
Alternatively, if DMRS frequency domain density is p, then the length of sequence is k × 12 × p × G,
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, G is frequency domain dispatching granularity, and unit is PRB, and k is just
Integer.Such as p is 1/2, i.e., on a PRB, only has DMRS on the subcarrier of half, such as
For even subcarriers, G=2 PRB, then, the length of sequence can be 12.
Alternatively, the length of the sequence can also be determined by the PRB numbers of transmission information, i.e., R × 12 ×
P/k, wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of DMRS.K can
To be default, or eNB notifies, such as notified by RRC signaling or DCI.
Alternatively, length informations of the eNB to UE notification sequences.Such as, eNB notifies 1bit letters to UE
Breath, if the bit is " 0 ", DMRS is ZC sequences one long on frequency domain, and sequence length is
Distribute to UE all subcarrier numbers；If the bit is " 1 ", DMRS is on frequency domain by two
Short ZC sequences composition, each short sequence length is the half for all subcarrier numbers for distributing to UE.Or
Person, eNB can indicate the length of short sequence directly to UE, should than if any a short sequence pair of set expression
PRB size, such as { 2,4,8,16 }, indicated with 4bit.If eNB is 8 to UE indicating lengths,
When the resource of distribution is 16 PRB, then DMRS is made up of the ZC sequences of 28 length.Work as distribution
Resource when being 8 PRB, then DMRS is made up of the ZC sequences of 18 length.
Alternatively, composition UE DMRS several ZC sequences can be with identical, can also be different, described
ZC sequences are determined by default mode, such as are determined by cell ID.Or can be that eNB passes through RRC
What signaling or DCI were indicated.
DMRS can take the resource of all distribution on a symbol, can also not extend around the resource of distribution,
The present invention is not limited.Such as, there was only 6 RE on each symbol as DMRS, every 2 PRB lifes
Into a short sequence, then the length of short sequence is 12, if the resource of distribution is 4 PRB, then
It is made up of on DMRS frequency domains the short sequence of two 12 length.
Alternatively, eNB can indicate that its DMRS of UE is a long sequence or multiple short sequences, such as
The resource for distributing to UE is 8 PRB, and eNB can indicate that its DMRS is a 8 × 12=96 to UE
Long sequence, or the short sequence that 4 length are 2 × 12=24.ENB can use 1bit in DCI
Instruction, or give UE to indicate in RRC signaling.
Alternatively, the DMRS sequences on each TTI can be hopping according to default mode.
Application Example two：
The present embodiment provides a kind of up DMRS sending method.In the present embodiment, former and later two TTI
There is the overlapping of symbol, DMRS is sent on overlapping symbol, as shown in Figure 4.Where DMRS
Symbol on, the DMRS that UE is sent only takes up part RE in the PUSCH resources of distribution.Such as only
Take odd number RE, or even number RE.The DMRS that UE on former and later two TTI is sent is by taking not
With subcarrier realize orthogonal, such as previous TTI UE takes odd subcarriers, latter TTI's
UE takes even subcarriers.
Alternatively, two TTI symbolic number can also be different, such as one TTI takes the symbol of a subframe
Number #0~3, another TTI takes symbol #0~6 of the subframe, here the index of symbol and existing LTE
In definition it is identical, then the two TTI DMRS can be sent on symbol #3.It is described two
TTI DMRS is frequency division.
The position for the subcarrier that DMRS takes can be default, such as can be determined by TTI index,
Such as even number TTI, occupancy is odd subcarriers, for odd number TTI, and occupancy is even subcarriers.
Alternatively, the position for the subcarrier that DMRS takes can also be determined by cell ID, such as work as cell
When being designated odd number, for even number TTI, occupancy is odd subcarriers, for odd number TTI, occupancy
It is even subcarriers；When cell ID is even number, for even number TTI, occupancy is even subcarriers,
For odd number TTI, occupancy is odd subcarriers.
Alternatively, the position for the subcarrier that DMRS takes can also be identified by UE and be determined, such as works as UE
When being designated even number, even subcarriers are taken, when UE is designated odd number, odd subcarriers are taken.
Alternatively, the position for the subcarrier that DMRS takes can also be by wireless frame index/subframe index/time slot
Index determines that, such as in odd numbered sub-frames, for even number TTI, occupancy is odd subcarriers, for odd number
TTI, occupancy is even subcarriers.In even subframe, for even number TTI, occupancy is even subcarriers,
For odd number TTI, occupancy is odd subcarriers.
Or the position of the subcarrier of UE occupancy is that eNB is notified, such as is notified by RRC signaling,
Or DCI is notified.What it is such as with 1bit information instruction occupancy is odd subcarriers or even subcarriers.Can
Selection of land, eNB also can indicate that the odd subcarriers or the corresponding PRB information of even subcarriers, such as
ENB can be to UE instructions on PRB3~5 for 0~5, eNB to the PRB that UE is distributed, DMRS
Odd subcarriers are taken, on PRB#0~2, the whole subcarriers of occupancy are defaulted to.The PRB information can
To be the index for originating PRB and the index for ending PRB, i.e. PRB#3 in example and 5, or can be with
Represented with existing RIV values, or PRB index can be indicated, cut-off PRB is distribution
Index to PUSCH cut-off PRB.
Alternatively, sub-carrier positions of the DMRS on each TTI can according to the sub-carrier positions of notice with
And in TTI indexes, cell ID, UE mark and wireless frame index/subframe index/time slot index at least it
One obtains.
An example is given below, TTI length is 2 symbols.Pilot tone is in the overlapping of former and later two TTI
Sent on symbol.As shown in figure 5, bold box represents a PRB, DMRS is grey parts, last
Individual TTI can have the overlapping of symbol with the TTI of next subframe, due to 14 not being 3 integral multiple,
Therefore 3 subframes can just take 14 complete TTI.
Or, the overlapping and nonoverlapping modes of TTI are mixing applications, in a subframe, TTI#0~7
It is overlapping two-by-two, TTI#8 and other any TTI are no overlapping, and DMRS can monopolize a symbol,
DMRS position can be as shown in Figure 6 and Figure 7.Alternatively, the symbol in TTI#8 where DMRS
On.DMRS can also occupancy portion subcarriers, other its carrier-wave transmission data.
Application Example three：
For short TTI scene, 2 TTI are comprised at least in a LTE subframe.Given in the present embodiment
Go out a kind of sending method of reference signal.In the present embodiment, at least two TTI reference signal is identical
One or more symbol on transmit.Method in the present embodiment can be used for it is up, can be used for it is descending,
On the symbol where reference signal, each UE DMRS can take all RE, can also account for
Part RE.
Such as, for a subframe, two symbols of foremost are used for all UE's for transmitting the subframe
DMRS, as shown in figure 8, each subframe includes 4 TTI, each TTI takes 3 symbols.Above
Two symbols used to transmit the DMRS of the UE on the DMRS of data, 4 TTI in 4 TTI
Different OCC and cyclic shift, or different subcarriers can also be taken.The present embodiment is not limited.
Other PRB only depicted in figure on a PRB, full bandwidth are identical with this.
In Fig. 9,3 TTI are included in a time slot.The DMRS of UE on 3 TTI is first
Sent on individual symbol.
Application Example four：
The present embodiment provides a kind of method for sending reference signal.The present embodiment comes by taking up DMRS as an example
Illustrate, methods described can also be applied to descending.
When UE needs to carry out multilayer transmission, every layer needs to use a DMRS, to distinguish different interlayers
Transmission.It can be transmitted between the DMRS of different layers by the way of following.
Mode one：
Frequency division between the DMRS of different layers, is accorded with than the DMRS if any 2 layers, two layers of transmission in identical
Transmitted on number.One layer uses even subcarriers, and another layer uses odd wave.In this case, to UE's
Resource allocation is restricted.The granularity of resource allocation should be at least 2 PRB.In another example having 4 layers, four layers of biography
Defeated DMRS alternate transports.As shown in Figure 10.Figure 10 is the TTI of 3 symbols composition, wherein
The numeral 0,1,2,3 that DMRS is located in first symbol, first symbol in RE represents 4 layers respectively
The DMRS of transmission.In this case, the resource allocation to UE is restricted.The granularity of resource allocation should be extremely
It is 4 PRB less.
The corresponding frequency domain positions of DMRS of every layer of transmission can be default, such as the number of plies and RE have fixation
Mapping relations, as shown in Figure 10, or can also be that eNB is notified, such as by RRC signaling or
Person DCI is indicated.
Mode two：
Frequency division and/or code division between different layers, than if any 4 layers, wherein 2 layers use even subcarriers, other
Use odd subcarriers two layers, distinguished using the layer of same sub-carrier using code division.This mode, when having
During 4 layers of transmission, resource allocation granularity is at least 2 PRB.
Application Example five：
The present embodiment provides a kind of method of reference signal encryption.For the present embodiment is by taking up DMRS as an example
Bright, methods described can also be applied to descending.
In the present embodiment, if reference signal be not encrypted, then UE is only sending PUSCH's
Reference signal is sent in TTI；If reference signal to be encrypted, then UE is also needed to next
Reference signal, so, reference signal are sent on the position that reference signal is sent in a TTI or upper TTI
Density add, at a high speed or coverage enhancement scene under, demodulation performance can be increased.
A schematic diagram is provided in Figure 11.In Figure 11, a subframe has had 4 TTI, each TTI altogether
Reference signal sent on first symbol of the TTI.When needing to refer to signal encryption, then can
Transmission of reference signals is gone back on the symbol where reference signal in the next tti.Such as, in fig. 11,
UE in TTI#1 needs to refer to signal encryption, then reference signal institute of the reference signal encrypted in TTI#2
Symbol in send.In order that the reference signal of two UE on first symbol in TTI#2 is orthogonal,
Two UE reference signal can be with code division or frequency division.
Alternatively, UE can carry out reference signal encryption according to eNB instruction, such as eNB passes through SIB
Or RRC signaling or DCI signal UE and carry out reference signal encryption.Or, UE can basis
Transmission mode/UE types carries out reference signal encryption, such as when UE is operated in fast mode or works as UE
When being the UE of high-speed type, then reference signal encryption can be carried out.If downlink reference signal, eNB roots
Carry out reference signal encryption according to UE transmission mode/UE types, or by SIB or RRC signaling or
Person DCI signals UE and carries out reference signal encryption.
Alternatively, eNB or UE sends the position of reference signal in next TTI or a upper TTI
The extra reference signal for putting transmission can be identical with the sequence of the reference signal in this TTI, can also not
Together, cyclic shift can be with identical, can also be different.ENB can notify the sequence of the reference channel additionally sent
Row and/or cyclic shift.
Alternatively, in order to further improve demodulation performance, UE can also be sent out on this TTI other symbols
Reference channel is sent, further reference signal is encrypted.As shown in figure 12, transmitted on TTI#1
UE, also send reference signal on the symbol of oblique line portion, and density is further increased.
Application Example six：
The present embodiment provides a kind of method of reference signal encryption.For the present embodiment is by taking up DMRS as an example
Bright, methods described can also be applied to descending.
In the present embodiment, if reference signal be not encrypted, reference signal is overlapping in two TTI
Symbol on send, as shown in the symbol of grey in Figure 13.The DMRS of UE on former and later two TTI
Can with frequency division, can also code division, the present embodiment is not limited.When reference channel is encrypted, reference
Signal is sent on other symbols in this TTI, in such as Figure 13, the UE in TTI#1, in oblique line mark
Reference signal is also sent in the symbol of knowledge.On the symbol that oblique line is represented, DMRS can take PUSCH
Resource, can also only take up portion subcarriers, such as only takes up odd subcarriers, and data take even number and carried
Ripple.
The notice or presetting method such as embodiment five of reference signal encryption.
Alternatively, eNB can also notify UE to send DMRS character position and/or the density of transmission.Than
If DMRS is that every 2 RE send one, or every 4 RE transmissions one.
The description of relevant technical terms as shown in table 1 below involved by this paper：
Table 1
If integrated module described in the embodiment of the present invention is realized using in the form of software function module and as independently
Production marketing or in use, can also be stored in a computer read/write memory medium.Based on so
Understanding, the part that the technical scheme of the embodiment of the present invention substantially contributes to prior art in other words can
To be embodied in the form of software product, the computer software product is stored in a storage medium, bag
Some instructions are included to so that a computer equipment (can be personal computer, server or network
Equipment etc.) perform all or part of each of the invention embodiment methods described.And foregoing storage medium bag
Include：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with storage program generation
The medium of code.So, the embodiment of the present invention is not restricted to any specific hardware and software combination.
Accordingly, the embodiment of the present invention also provides a kind of computer-readable storage medium, wherein the computer journey that is stored with
Sequence, the computer program is used for the method for performing the transmission of reference signals of the embodiment of the present invention.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the protection model of the present invention
Enclose.
Claims (29)
1. a kind of method of transmission of reference signals, it is characterised in that methods described includes：
A Transmission Time Interval is determined in the way of default mode and/or enhanced base station eNB instructions
The corresponding reference signals of TTI.
2. according to the method described in claim 1, it is characterised in that methods described includes：
Information in the TTI is parsed according to the reference signal, the TTI is less than first threshold.
3. according to the method described in claim 1, it is characterised in that methods described also includes：
It is transmitted on a symbol where the reference signal, the reference signal is by N number of sequence group
Into wherein N is the integer more than 1.
4. method according to claim 3, it is characterised in that the length of N number of sequence is pre-
If length or eNB notify length.
5. method according to claim 3, it is characterised in that the length of N number of sequence by with
It is at least one lower to determine：
Frequency domain dispatching granularity；
The frequency domain density of the reference signal；
The corresponding resource of the reference signal.
6. method according to claim 3, it is characterised in that each sequence in N number of sequence
Length be one below：
R × 12 × p/k, k × 12 × p × G；
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of the reference signal,
G is frequency domain dispatching granularity, and unit is PRB, and k is positive integer.
7. according to the method described in claim 1, it is characterised in that methods described also includes：
The reference signal is transmitted on the specified subcarrier in a symbol, and the specified subcarrier is
The subcarrier that default subcarrier or eNB are notified.
8. method according to claim 7, it is characterised in that the specified subcarrier by it is following at least
One of determine：
TTI indexes；
Cell ID；
UE is identified；
Wireless frame index/subframe index/time slot index.
9. method according to claim 7, it is characterised in that methods described also includes：
When two or more TTI have superimposed symbols, the reference signal is one or more described overlapping
It is transmitted on symbol.
10. according to the method described in claim 1, it is characterised in that methods described also includes：
When n TTI is one group, the reference signal of the n TTI is in one or more default symbol
On be transmitted, wherein, the n is integer more than 1.
11. method according to claim 10, it is characterised in that the n TTI is a subframe
On all TTI, or be all TTI on time slot.
12. according to the method described in claim 1, it is characterised in that methods described also includes：
The reference signal is transmitted on the TTI of transmission information and on the TTI adjacent with the TTI.
13. according to the method described in claim 1, it is characterised in that methods described also includes：
The reference signal is sent according to transmission mode and/or device type or according to eNB instruction.
14. according to the method described in claim 1, it is characterised in that methods described also includes：
When the reference signal includes multiple layers, be between different layers by the way of frequency division and code division, or
The mode of frequency division is transmitted.
15. a kind of network equipment, it is characterised in that the network equipment includes：
Indicating mode acquiring unit, for obtaining the side that default mode and/or enhanced base station eNB are indicated
Formula；
Signal transmits determining unit, in the way of the default mode and/or eNB instructions
Determine the corresponding reference signals of a Transmission Time Interval TTI.
16. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
Resolution unit, for parsing the information in the TTI according to the reference signal, the TTI is less than
First threshold.
17. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
Signal transmission unit, for being transmitted on a symbol where the reference signal, the ginseng
Examine signal to be made up of N number of sequence, wherein N is the integer more than 1.
18. the network equipment according to claim 17, it is characterised in that the length of N number of sequence
Spend the length for default length or eNB notices.
19. the network equipment according to claim 17, it is characterised in that the length of N number of sequence
Degree is determined by least one of：
Frequency domain dispatching granularity；
The frequency domain density of the reference signal；
The corresponding resource of the reference signal.
20. the network equipment according to claim 17, it is characterised in that every in N number of sequence
The length of individual sequence is one below：
R × 12 × p/k, k × 12 × p × G；
Wherein, p ∈ { 1,1/2,1/3,1/4,1/6,1/12 }, R is the corresponding PRB numbers of the reference signal,
G is frequency domain dispatching granularity, and unit is PRB, and k is positive integer.
21. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
The reference signal is transmitted on the specified subcarrier in a symbol, and the specified subcarrier is
The subcarrier that default subcarrier or eNB are notified.
22. the network equipment according to claim 21, it is characterised in that the specified subcarrier by with
It is at least one lower to determine：
TTI indexes；
Cell ID；
UE is identified；
Wireless frame index/subframe index/time slot index.
23. the network equipment according to claim 21, it is characterised in that the network equipment also includes：
Signal transmission unit, for when two or more TTI have superimposed symbols, the reference signal to be one
It is transmitted on individual or multiple described superimposed symbols.
24. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
Signal transmission unit, for when n TTI is one group, the reference signal of the n TTI to be pre-
If one or more symbol on be transmitted, wherein, the n is integer more than 1.
25. the network equipment according to claim 24, it is characterised in that the n TTI is one
All TTI in subframe, or be all TTI on a time slot.
26. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
Signal transmission unit, for the network equipment transmission information TTI on and with the TTI phases
The reference signal is transmitted on adjacent TTI.
27. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
Signal transmission unit, for the network equipment according to transmission mode and/or device type or according to
ENB instruction sends the reference signal.
28. the network equipment according to claim 15, it is characterised in that the network equipment also includes：
Signal transmission unit, for being using frequency between different layers when the reference signal includes multiple layers
The mode with code division, or the mode of frequency division is divided to be transmitted.
29. the network equipment according to any one of claim 15 to 28, it is characterised in that the net
Network equipment includes terminal or base station.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045960.9A CN106998247A (en) | 2016-01-22 | 2016-01-22 | The method and the network equipment of a kind of transmission of reference signals |
| PCT/CN2017/072118 WO2017125090A1 (en) | 2016-01-22 | 2017-01-22 | Method of transmitting reference signal and network equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610045960.9A CN106998247A (en) | 2016-01-22 | 2016-01-22 | The method and the network equipment of a kind of transmission of reference signals |
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| Publication Number | Publication Date |
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| CN106998247A true CN106998247A (en) | 2017-08-01 |
Family
ID=59361395
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610045960.9A Withdrawn CN106998247A (en) | 2016-01-22 | 2016-01-22 | The method and the network equipment of a kind of transmission of reference signals |
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| Country | Link |
|---|---|
| CN (1) | CN106998247A (en) |
| WO (1) | WO2017125090A1 (en) |
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| WO2019029293A1 (en) * | 2017-08-11 | 2019-02-14 | 电信科学技术研究院有限公司 | Data transmission method and device |
| CN109587798A (en) * | 2017-09-29 | 2019-04-05 | 中兴通讯股份有限公司 | Reference signal, the determination method and device of control channel unit, storage medium |
| CN109792368A (en) * | 2017-08-11 | 2019-05-21 | 瑞典爱立信有限公司 | Method for sending reference signal |
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| WO2018010586A1 (en) * | 2016-07-13 | 2018-01-18 | 上海朗帛通信技术有限公司 | Method and apparatus in wireless communications |
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| CN111316729A (en) * | 2017-09-26 | 2020-06-19 | 夏普株式会社 | Terminal device and base station device |
| CN111316729B (en) * | 2017-09-26 | 2023-04-04 | 夏普株式会社 | Terminal device and base station device |
| CN109587798A (en) * | 2017-09-29 | 2019-04-05 | 中兴通讯股份有限公司 | Reference signal, the determination method and device of control channel unit, storage medium |
| CN109587798B (en) * | 2017-09-29 | 2023-07-14 | 中兴通讯股份有限公司 | Method and device for determining reference signal and control channel unit and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017125090A1 (en) | 2017-07-27 |
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