CN107623563A - A kind of method and device of configuration DMRS in V2X communications - Google Patents
A kind of method and device of configuration DMRS in V2X communications Download PDFInfo
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- CN107623563A CN107623563A CN201610539521.3A CN201610539521A CN107623563A CN 107623563 A CN107623563 A CN 107623563A CN 201610539521 A CN201610539521 A CN 201610539521A CN 107623563 A CN107623563 A CN 107623563A
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Abstract
The method and device of configuration DMRS in being communicated the invention discloses V2X a kind of, the mode of the configuration DMRS is included in time domain distinguishes 4 different users by OCC=4 orthogonal mask；And/or it is included on frequency domain and distinguishes N1 different user using OCC=N1 orthogonal mask；And/or, it is included in using the demodulated reference signal basic sequence that correlation is small in identical spread bandwidth, or, use the different cyclic shifts of identical DMRS basic sequences, so as to improve the number of users that DMRS can be distinguished, to adapt to the problem of user density is larger in V2X communications；The orthogonality of DMRS symbols between can improving user according to Given information when selecting DMRS relevant parameter.
Description
Technical field
The present embodiments relate to the method for the configuration DMRS in the technical field of communication, more particularly to a kind of V2X communications
And device.
Background technology
In R12D2D (the device to device of release 12), a D2D message is by control information
(scheduling assignment, SA) and data message (data) two parts are formed.SA is used to indicate the resource where data
Position and relevant parameter.According to SA ID (the target group ID) values included in its corresponding SA to demodulation when user transmits data
Reference signal (Demodulation Reference Signal, DMRS) carries out jump group, cyclic shift, orthogonal mask
(Orthogonal cover code, OCC) etc. is configured, to be randomized using part same asset or part same asset
The interference of DMRS symbols between different user.
V2X (vehicle to X) is a kind of car networking communication technology for being multiplexed D2D and having eated dishes without rice or wine.Due to V2X communication scenes
User density be much larger than D2D, so user has larger probability to use part identical resource, and use part identical resource
Number of users it is also more compared with D2D.The number of users that data DMRS allocation plans can be distinguished in D2D is less, and can not be effectively
Using other information improve user between DMRS symbols orthogonality, if be directly used in V2X communication in systematic function can be caused compared with
It is big to influence.
The content of the invention
Method and device of the purpose of the embodiment of the present invention in the configuration DMRS in a kind of V2X communications are proposed, it is intended to solve
When certainly how a large number of users is using same asset or part same asset transmission data in V2X communications, meet different user
Between DMRS orthogonality to distinguish different user the problem of.
To use following technical scheme up to this purpose, the embodiment of the present invention：
In a first aspect, the method for the configuration DMRS in V2X communications a kind of, methods described include：
Obtain the configuration DMRS pre-set mode；
According to the mode of the configuration DMRS pre-set, the DMRS of user is configured；
Wherein, the mode of the configuration DMRS is included in time domain distinguishes 4 different use by OCC=4 orthogonal mask
Family；And/or it is included on frequency domain and distinguishes N1 different user using OCC=N1 orthogonal mask；And/or it is included in identical
Using the demodulated reference signal basic sequence that correlation is small in spread bandwidth, or, followed using the difference of identical DMRS basic sequences
Ring shifts.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes 4 different users, base for the orthogonal mask by OCC=4 in time domain
Stand and 4 different user distribution same assets or part same asset are up to when distributing resource, and by signaling instruction not
4 demodulated reference signal symbols in subframe are corresponded to user using different OCC code words to be modulated.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, when
When the user independently selects resource, the user selects OCC code words to correspond to 4 demodulation references in subframe according to parameter preset
Signal code is modulated, and the parameter preset includes identity.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
Then during base station distribution resource, same asset or part same asset are distributed for most N1 users, and by signaling instruction not
It is modulated with user using the subcarrier corresponding to different OCC code words on demodulated reference signal symbol；Wherein, N1 values are prewired
Put, or the base station is allocated to the user's when distributing resource.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
When then the user independently selects resource, user demodulation reference according to corresponding to corresponding identity selects OCC code words
Subcarrier in signal code is modulated；Wherein, N1 values are pre-configured, or the base station is allocated to institute when distributing resource
State user's.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when base station is the user resource allocation, if
Same asset or part same asset are distributed apart near user, then notifies to transmit solution in the bandwidth of the user after expansion
Reference signal is adjusted, the bandwidth after extension includes the bandwidth that the user uses, and the bandwidth of data division is constant；
The base station indicates that each user uses the less demodulated reference signal base of cross correlation by configuring extra parameter
Sequence；Or identical demodulated reference signal basic sequence is used, and using different cyclic shifts to ensure to demodulate between different user
The orthogonality of reference signal.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when the user independently selects data resources,
Demodulated reference signal is transmitted on the whole available bandwidth of data resource pools, data division bandwidth is constant；
The user is pre-configured or by base station configuration and geographic location area relevant parameter, according to described and geographical position
Put the demodulated reference signal basic sequence that region relevant parameter and used data resource locations determine to use.
Preferably, it is described when the user independently selects data resources, on the whole available bandwidth of data resource pools
Demodulated reference signal is transmitted, data division bandwidth is constant, including：
The user independently selects the bandwidth of the data resource pools where resource to use small configuration, to meet the user
Power requirement when whole bandwidth sends demodulated reference signal.
Preferably, determined described in the basis with geographic location area relevant parameter and used data resource locations
The demodulated reference signal basic sequence used, including：
Distance is near and uses the less demodulation reference of cross correlation using the user of same asset or part same asset
Signal basic sequence；Or
Distance is near and uses identical demodulated reference signal motif using the user of same asset or part same asset
Row, by different cyclic shifts to ensure the orthogonality of demodulated reference signal between different user.
Preferably, the user needs to indicate that the DMRS that this user uses matches somebody with somebody confidence in control information corresponding to data message
Breath, the mode of instruction include display or implicit；The content of instruction includes：During using time domain OCC, OCC codes used in instruction
Word；During using frequency domain OCC, N1 sizes used in instruction and OCC code words；During using spread bandwidth, bandwidth used in instruction,
DMRS basic sequences and cyclic shift.
Second aspect, configures DMRS device in a kind of V2X communications, described device includes：
Acquisition module, for obtaining the configuration DMRS pre-set mode；
Configuration module, for the configuration DMRS mode pre-set according to, configure the DMRS of user；
Wherein, the mode of the configuration DMRS is included in time domain distinguishes 4 different use by OCC=4 orthogonal mask
Family；And/or it is included on frequency domain and distinguishes N1 different user using OCC=N1 orthogonal mask；And/or it is included in identical
Using the demodulated reference signal basic sequence that correlation is small in spread bandwidth, or, followed using the difference of identical DMRS basic sequences
Ring shifts.
Preferably, the configuration module, is used for：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain,
4 different user distribution same assets or part same asset are up to when distributing resource, and different use are indicated by signaling
4 demodulated reference signal symbols that family is corresponded to using different OCC code words in subframe are modulated.
Preferably, the configuration module, is used for：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, when
When the user independently selects resource, OCC code words are selected to correspond to 4 demodulated reference signal symbols in subframe according to parameter preset
It is modulated, the parameter preset includes identity.
Preferably, the configuration module, is used for：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
When then distributing resource, same asset or part same asset are distributed for most N1 users, and different use are indicated by signaling
Family is modulated using the subcarrier corresponding to different OCC code words on demodulated reference signal symbol；Wherein, N1 values is pre-configured,
Or the base station is allocated to the user's when distributing resource.
Preferably, the configuration module, is used for：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
Then when the user independently selects resource, the demodulated reference signal symbol according to corresponding to corresponding identity selects OCC code words
Subcarrier on number is modulated；Wherein, N1 values are pre-configured, or the base station is allocated to the user when distributing resource
's.
Preferably, the configuration module, is used for：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when the base station is the user resource allocation
When, same asset or part same asset are distributed if apart near user, then notifies the bandwidth of the user after expansion
Upper transmission demodulated reference signal, the bandwidth after extension include the bandwidth that the user uses, and the bandwidth of data division is constant；Pass through
Configure extra parameter and indicate that each user uses the less demodulated reference signal basic sequence of cross correlation；Or demodulated using identical
Reference signal basic sequence, and using different cyclic shifts to ensure the orthogonality of demodulated reference signal between different user.
Preferably, the configuration module, is used for：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when the user independently selects data resources,
Demodulated reference signal is transmitted on the whole available bandwidth of data resource pools, data division bandwidth is constant；
The user it is pre-configured or by the base station configuration with geographic location area relevant parameter in the case of, according to institute
State the demodulated reference signal basic sequence used with geographic location area relevant parameter and the determination of used data resource locations.
Preferably, the configuration module, is additionally operable to：
The bandwidth of data resource pools where autonomous selection resource should use small configuration, to meet the user in whole band
Width sends power requirement during demodulated reference signal.
Preferably, the configuration module, is additionally operable to：
Distance is near and uses the less demodulation reference of cross correlation using the user of same asset or part same asset
Signal basic sequence；Or
Distance is near and uses identical demodulated reference signal motif using the user of same asset or part same asset
Row, by different cyclic shifts to ensure the orthogonality of demodulated reference signal between different user.
Preferably, the user needs to indicate that the DMRS that this user uses matches somebody with somebody confidence in control information corresponding to data message
Breath, the mode of instruction include display or implicit；The content of instruction includes：During using time domain OCC, OCC codes used in instruction
Word；During using frequency domain OCC, N1 sizes used in instruction and OCC code words；During using spread bandwidth, bandwidth used in instruction,
DMRS basic sequences and cyclic shift.
The embodiment of the present invention provides the method and device of the configuration DMRS in V2X communications a kind of, the side of the configuration DMRS
Formula is included in time domain distinguishes 4 different users by OCC=4 orthogonal mask；And/or it is included on frequency domain and uses OCC=
N1 orthogonal mask distinguishes N1 different user；And/or it is included in identical spread bandwidth and is joined using the small demodulation of correlation
Signal basic sequence being examined, or, using the different cyclic shifts of identical DMRS basic sequences, can distinguish so as to improving DMRS
Number of users, to adapt to the problem of user density is larger in V2X communications；Can be according to known letter when selecting DMRS relevant parameter
Breath improves the orthogonality of DMRS symbols between user.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention one provides；
Fig. 2 is the schematic flow sheet of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention two provides；
Fig. 3 is the method schematic diagram that DMRS is configured under a kind of time domain OCC provided in an embodiment of the present invention；
Fig. 4 is the schematic flow sheet of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention three provides；
Fig. 5 is the method schematic diagram that DMRS is configured under a kind of frequency domain OCC provided in an embodiment of the present invention；
Fig. 6 is the schematic flow sheet of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention four provides；
Fig. 7 is the method schematic diagram that DMRS is configured under a kind of extension DMRS transmission bandwidths provided in an embodiment of the present invention；
Fig. 8 is the high-level schematic functional block diagram of the device of the configuration DMRS in a kind of V2X communications provided in an embodiment of the present invention.
Embodiment
The embodiment of the present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this
The specific embodiment of place description is used only for explaining the embodiment of the present invention, rather than the restriction to the embodiment of the present invention.In addition also
It should be noted that for the ease of describing, the part related to the embodiment of the present invention rather than entire infrastructure are illustrate only in accompanying drawing.
Embodiment one
With reference to figure 1, Fig. 1 is the flow of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention one provides
Schematic diagram.
As shown in figure 1, the method for the configuration DMRS in the V2X communications includes：
Step 101, the configuration DMRS pre-set mode is obtained；
Specifically, DMRS mode can be pre-configured with, the mode of the configuration DMRS is including but not limited to following three kinds
Situation：
The first situation, the mode of the configuration DMRS is included in time domain distinguishes 4 by OCC=4 orthogonal mask
Different user.
Second of situation, the mode of the configuration DMRS is included on frequency domain distinguishes N1 using OCC=N1 orthogonal mask
Individual different user.
The third situation, the mode of the configuration DMRS are included in identical spread bandwidth using the demodulation that correlation is small
Reference signal basic sequence, or, use the different cyclic shifts of identical DMRS basic sequences.Wherein, using identical DMRS bases
The different cyclic shifts of sequence be in order to：Ensure the orthogonality of the demodulated reference signal between different user.
Step 102, according to the mode of the configuration DMRS pre-set, the DMRS of user is configured.
Specifically, for the disposal subject of the first above-mentioned situation, second of situation and the third situation, including it is but unlimited
In base station or user.
The method that the embodiment of the present invention provides the configuration DMRS in a kind of V2X communications, the mode of the configuration DMRS include
4 different users are distinguished by OCC=4 orthogonal mask in time domain；And/or it is included on frequency domain using OCC=N1 just
Mask is handed over to distinguish N1 different user；And/or it is included in identical spread bandwidth using the demodulated reference signal that correlation is small
Basic sequence, or, using the different cyclic shifts of identical DMRS basic sequences, so as to improve the user that DMRS can be distinguished
Number, to adapt to the problem of user density is larger in V2X communications；It can be carried when selecting DMRS relevant parameter according to Given information
The orthogonality of DMRS symbols between high user.
Embodiment two
With reference to figure 2, Fig. 2 is the flow of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention two provides
Schematic diagram.
As shown in Fig. 2 the method for the configuration DMRS in the V2X communications includes：
Step 201, the configuration DMRS pre-set mode is obtained, the mode of the configuration DMRS, which is included in time domain, leads to
The orthogonal mask for crossing OCC=4 distinguishes 4 different users；
Step 202, according to the mode of the configuration DMRS pre-set, the DMRS of user is configured.
Specifically, for the first situation, a subframe in V2X communications includes 4 DMRS symbols, thus can when
It is as shown in table 1 below using OCC=4 orthogonal mask to distinguish 4 different users on domain.Guarantee is needed using during the program not
It is smaller with the intersymbol channel variations of DMRS, therefore it is only applicable to low speed scene.
| Code1 | Code2 | Code3 | Code4 | |
| DMRS symbols 1 | 1 | 1 | 1 | 1 |
| DMRS symbols 2 | 1 | -1 | 1 | -1 |
| DMRS symbols 3 | 1 | 1 | -1 | -1 |
| DMRS symbols 4 | 1 | -1 | -1 | 1 |
Table 1
For the first situation, the mode of realization can be following two concrete forms：
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes 4 different users, base for the orthogonal mask by OCC=4 in time domain
Stand and 4 different user distribution same assets or part same asset are up to when distributing resource, and by signaling instruction not
4 demodulated reference signal symbols in subframe are corresponded to user using different OCC code words to be modulated.
Specifically, as shown in figure 3, the method that Fig. 3 is configuration DMRS under a kind of time domain OCC provided in an embodiment of the present invention is shown
It is intended to.Can be that most 4 users distribute identical resource, and different user is indicated by signaling when resource is distributed in base station
4 DMRS symbols in subframe are modulated using different OCC code words.User needs explanation certainly in SA corresponding to data
The OCC code words that oneself uses, the explanation can be explicit or implicit.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, when
When the user independently selects resource, the user selects OCC code words to correspond to 4 demodulation references in subframe according to parameter preset
Signal code is modulated, and the parameter preset includes identity.
Specifically, when user independently selects resource, user selects OCC code words pair according to relevant parameter (such as ID of oneself)
4 DMRS symbols in subframe are modulated.User needs to illustrate the OCC code words oneself used in SA corresponding to data, should
Illustrate it can is explicit or implicit.
Embodiment three
With reference to figure 4, Fig. 4 is the flow of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention three provides
Schematic diagram.
As shown in figure 4, the method for the configuration DMRS in the V2X communications includes：
Step 401, the configuration DMRS pre-set mode is obtained, the mode of the configuration DMRS is included on frequency domain and made
N1 different user is distinguished with OCC=N1 orthogonal mask；
Step 402, according to the mode of the configuration DMRS pre-set, the DMRS of user is configured.
Specifically, for second of situation, on continuous N1 (even number) individual subcarrier on frequency domain using OCC=N1 just
Mask is handed over to distinguish N1 different user.
N1 must be even number.N1 is more big, and the number of users that can be distinguished is more, but can improve certain user simultaneously some
The accuracy of PAPR and reduction channel estimation on DMRS symbols.Specific value size can be according to the load of system and business
Performance requirement selects.Larger N1 is selected when such as loading larger, less N1 is selected when performance requirement is higher.
If data takes N2 RB on frequency domain, then the least common multiple that system distribution N2 minimum particle size is N1 and 12 removes
With 12.
Wherein, the least unit of Long Term Evolution (Long Term Evolution, LTE) inner system dividing frequency resource is 1
Individual RB, a RB include 12 subcarriers.Here frequency domain OCC is that the symbol on sub-carrier is modulated, per N1 subcarrier
It is modulated using the OCC code words of N1 length, it requires the sub-carrier number that the minimum particle size of the frequency resource of distribution is included
Be N1 integral multiple, while be 12 integral multiple again, i.e. N1 and 12 least common multiple, then divided by 12 be exactly RB numbers (N2).
For second of situation, the mode of realization can be following two concrete forms：
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
Then during base station distribution resource, same asset or part same asset are distributed for most N1 users, and by signaling instruction not
It is modulated with user using the subcarrier corresponding to different OCC code words on demodulated reference signal symbol；Wherein, N1 values are prewired
Put, or the base station is allocated to the user's when distributing resource.
Specifically, as shown in figure 5, the method that Fig. 5 is configuration DMRS under a kind of frequency domain OCC provided in an embodiment of the present invention is shown
It is intended to.Can be that most N1 users distribute (part) identical resource when resource is distributed in base station, and by signaling instruction not
The subcarrier on DMRS symbols is modulated using different OCC code words with user.N1 values can be it is pre-configured, can also
It is that base station is allocated to user when distributing resource.User need to illustrate in SA corresponding to data the N1 values oneself used and
OCC code words, the explanation can be explicit or implicit.
The mode of display is：There is special field to be used to illustrate these values in SA；
Implicit mode is：By indicating that the field of other information can calculate these values in SA, or according to SA's
Resource location can calculate these values.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
When then the user independently selects resource, user demodulation reference according to corresponding to corresponding identity selects OCC code words
Subcarrier in signal code is modulated；Wherein, N1 values are pre-configured, or the base station is allocated to institute when distributing resource
State user's.
Specifically, when user independently selects resource, user selects OCC code words pair according to relevant parameter (such as ID of oneself)
Subcarrier on DMRS symbols is modulated.N1 size can be that pre-configured or base station configures for it, also may be used
To be that user calculates according to relevant parameter (such as geographical location information).User needs explanation certainly in SA corresponding to data
The N1 values and OCC code words that oneself uses, the explanation can be explicit or implicit.
The first situation can be used in combination to distinguish more users with second of situation.Relevant information is needed in data
Illustrate in corresponding SA, the explanation can be explicit or implicit.
Example IV
With reference to figure 6, Fig. 6 is the flow of the method for the configuration DMRS in a kind of V2X communications that the embodiment of the present invention four provides
Schematic diagram.
As shown in fig. 6, the method for the configuration DMRS in the V2X communications includes：
Step 601, the configuration DMRS pre-set mode is obtained, the mode of the configuration DMRS is including the use of identical
The different cyclic shifts of DMRS basic sequences；
Step 602, according to the mode of the configuration DMRS pre-set, the DMRS of user is configured.
Specifically, the third situation is：Different user is made to send DMRS, data division bandwidth in identical spread bandwidth
It is constant, the less DMRS basic sequences of cross correlation, or the different cyclic shifts using identical DMRS basic sequences can be used, to protect
DMRS orthogonality between card different user.
For the third situation, the mode of realization can be following two concrete forms：
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when base station is the user resource allocation, if
Same asset or part same asset are distributed apart near user, then notifies to transmit solution in the bandwidth of the user after expansion
Reference signal is adjusted, the bandwidth after extension includes the bandwidth that the user uses, and the bandwidth of data division is constant；
The base station indicates that each user uses the less demodulated reference signal base of cross correlation by configuring extra parameter
Sequence；Or identical demodulated reference signal basic sequence is used, and using different cyclic shifts to ensure to demodulate between different user
The orthogonality of reference signal.
Specifically, as shown in fig. 7, Fig. 7 is configured under a kind of extension DMRS transmission bandwidths provided in an embodiment of the present invention
DMRS method schematic diagram.When base station is that user distributes data resources, (part) is distributed if some users closer to the distance
Identical resource, then these users are notified to transmit DMRS in larger bandwidth, data division bandwidth is constant, and the bandwidth should be able to
The bandwidth enough used comprising these users.Base station can indicate that each user is smaller using cross correlation by configuring extra parameter
DMRS basic sequences；Or identical DMRS basic sequences are used, and using different cyclic shifts to ensure DMRS between different user
Orthogonality.User needs to illustrate bandwidth, DMRS basic sequences and the cyclic shift oneself used in SA corresponding to data, should
Illustrate it can is explicit or implicit.
Preferably, the configuration DMRS pre-set described in the basis mode, the DMRS of user is configured, including：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when the user independently selects data resources,
Demodulated reference signal is transmitted on the whole available bandwidth of data resource pools, data division bandwidth is constant；
The user is pre-configured or by base station configuration and geographic location area relevant parameter, according to described and geographical position
Put the demodulated reference signal basic sequence that region relevant parameter and used data resource locations determine to use.
Preferably, it is described when the user independently selects data resources, on the whole available bandwidth of data resource pools
Demodulated reference signal is transmitted, data division bandwidth is constant, including：
The user independently selects the bandwidth of the data resource pools where resource to use small configuration, to meet the user
Power requirement when whole bandwidth sends demodulated reference signal.
Preferably, determined described in the basis with geographic location area relevant parameter and used data resource locations
The demodulated reference signal basic sequence used, including：
Distance is near and uses the less demodulation reference of cross correlation using the user of same asset or part same asset
Signal basic sequence；Or
Using identical demodulated reference signal basic sequence, by different cyclic shifts to ensure to demodulate between different user to join
Examine the orthogonality of signal.
Specifically, when user independently selects data resources, DMRS is transmitted on the whole available bandwidth of data resource pools
(data division bandwidth is constant).User is pre-configured or the parameter related to geographic location area is configured by base station, according to the parameter
And the DMRS basic sequences that used data resource locations (such as DFN) decision uses, it can make closer to the distance and use (portion
Point) user of same asset or part same asset uses the less DMRS basic sequences of cross correlation；Or use identical
DMRS basic sequences, by different cyclic shifts to ensure the orthogonality of DMRS between different user.User is in SA corresponding to data
Middle to need to illustrate bandwidth, DMRS basic sequences and the cyclic shift oneself used, the explanation can be explicit or hidden
Formula.It is smaller that user independently selects the bandwidth of the data resource pools where resource to be arranged to, to meet user in whole bandwidth
Send power requirement during DMRS.
The implementation can be used in combination with the first situation, second of situation to distinguish more users or provide more
Good performance.Relevant information needs illustrate that the explanation can be explicit or implicit in SA corresponding to data.
Embodiment five
With reference to figure 8, Fig. 8 is the functional module for the device that DMRS is configured in a kind of V2X communications provided in an embodiment of the present invention
Schematic diagram.
As shown in figure 8, described device includes：
Acquisition module 801, for obtaining the configuration DMRS pre-set mode；
Configuration module 802, for the configuration DMRS mode pre-set according to, configure the DMRS of user；
Wherein, the mode of the configuration DMRS is included in time domain distinguishes 4 different use by OCC=4 orthogonal mask
Family；And/or it is included on frequency domain and distinguishes N1 different user using OCC=N1 orthogonal mask；And/or it is included in identical
Using the demodulated reference signal basic sequence that correlation is small in spread bandwidth, or, followed using the difference of identical DMRS basic sequences
Ring shifts.
Preferably, the configuration module 502, is used for：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain,
4 different user distribution same assets or part same asset are up to when distributing resource, and different use are indicated by signaling
4 demodulated reference signal symbols that family is corresponded to using different OCC code words in subframe are modulated.
Preferably, the configuration module 502, is used for：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, when
When the user independently selects resource, user selects OCC code words to correspond to 4 demodulated reference signals in subframe according to parameter preset
Symbol is modulated, and the parameter preset includes identity.
Preferably, the configuration module 502, is used for：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
When then distributing resource, same asset or part same asset are distributed for most N1 users, and different use are indicated by signaling
Family is modulated using the subcarrier corresponding to different OCC code words on demodulated reference signal symbol；Wherein, N1 values is pre-configured,
Or the base station is allocated to the user's when distributing resource.
Preferably, the configuration module 502, is used for：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain,
Then when the user independently selects resource, the demodulated reference signal symbol according to corresponding to corresponding identity selects OCC code words
Subcarrier on number is modulated；Wherein, N1 values are pre-configured, or the base station is allocated to the user when distributing resource
's.
Preferably, the configuration module 502, is used for：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when the base station is the user resource allocation
When, same asset or part same asset are distributed if apart near user, then notifies the bandwidth of the user after expansion
Upper transmission demodulated reference signal, the bandwidth after extension include the bandwidth that the user uses, and the bandwidth of data division is constant；Pass through
Configure extra parameter and indicate that each user uses the less demodulated reference signal basic sequence of cross correlation；Or demodulated using identical
Reference signal basic sequence, and using different cyclic shifts to ensure the orthogonality of demodulated reference signal between different user.
Preferably, the configuration module 502, is used for：
If the mode of the configuration DMRS is using the demodulated reference signal base that correlation is small in identical spread bandwidth
Sequence, or, using the different cyclic shifts of identical DMRS basic sequences, then when the user independently selects data resources,
Demodulated reference signal is transmitted on the whole available bandwidth of data resource pools, data division bandwidth is constant；
The user it is pre-configured or by the base station configuration with geographic location area relevant parameter in the case of, according to institute
State the demodulated reference signal basic sequence used with geographic location area relevant parameter and the determination of used data resource locations.
Preferably, the configuration module 502, is additionally operable to：
The bandwidth of data resource pools where autonomous selection resource should use small configuration, to meet the user in whole band
Width sends power requirement during demodulated reference signal.
Preferably, the configuration module 502, is additionally operable to：
Distance is near and uses the less demodulation reference of cross correlation using the user of same asset or part same asset
Signal basic sequence；Or
Using identical demodulated reference signal basic sequence, by different cyclic shifts to ensure to demodulate between different user to join
Examine the orthogonality of signal.
Preferably, the user indicates that the DMRS that this user uses matches somebody with somebody confidence in control information corresponding to data message
Breath, the mode of instruction include display or implicit；The content of instruction includes：During using time domain OCC, OCC codes used in instruction
Word；During using frequency domain OCC, N1 sizes used in instruction and OCC code words；During using spread bandwidth, bandwidth used in instruction,
DMRS basic sequences and cyclic shift.
The embodiment of the present invention provides the device of the configuration DMRS in V2X communications a kind of, and the mode of the configuration DMRS includes
4 different users are distinguished by OCC=4 orthogonal mask in time domain；And/or it is included on frequency domain using OCC=N1 just
Mask is handed over to distinguish N1 different user；And/or it is included in identical spread bandwidth using the demodulated reference signal that correlation is small
Basic sequence, or, using the different cyclic shifts of identical DMRS basic sequences, so as to improve the user that DMRS can be distinguished
Number, to adapt to the problem of user density is larger in V2X communications；It can be carried when selecting DMRS relevant parameter according to Given information
The orthogonality of DMRS symbols between high user.
The technical principle of the embodiment of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain this
The principle of inventive embodiments, and the limitation to protection domain of the embodiment of the present invention can not be construed in any way.Based on herein
Explanation, those skilled in the art, which would not require any inventive effort, can associate the other specific of the embodiment of the present invention
Embodiment, these modes are fallen within the protection domain of the embodiment of the present invention.
Claims (20)
1. the method for the configuration DMRS in a kind of V2X communications, it is characterised in that methods described includes：
Obtain the configuration DMRS pre-set mode；
According to the mode of the configuration DMRS pre-set, the DMRS of user is configured；
Wherein, the mode of the configuration DMRS is included in time domain distinguishes 4 different users by OCC=4 orthogonal mask；
And/or it is included on frequency domain and distinguishes N1 different user using OCC=N1 orthogonal mask；And/or it is included in identical expansion
Open up using the demodulated reference signal basic sequence that correlation is small in bandwidth, or, circulated using the difference of identical DMRS basic sequences
Displacement.
2. according to the method for claim 1, it is characterised in that the configuration DMRS pre-set described in the basis side
Formula, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, base station exists
4 different user distribution same assets or part same asset are up to when distributing resource, and different use are indicated by signaling
4 demodulated reference signal symbols that family is corresponded to using different OCC code words in subframe are modulated.
3. according to the method for claim 1, it is characterised in that the configuration DMRS pre-set described in the basis side
Formula, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, when described
When user independently selects resource, the user selects OCC code words to correspond to 4 DMRS symbols progress in subframe according to parameter preset
Modulation, the parameter preset include identity.
4. according to the method for claim 1, it is characterised in that the configuration DMRS pre-set described in the basis side
Formula, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes N1 different user, base for the orthogonal mask using OCC=N1 on frequency domain
During distribution resource of standing, same asset or part same asset are distributed for most N1 users, and different use are indicated by signaling
Family is modulated using different OCC code words to the subcarrier on demodulated reference signal symbol；Wherein, N1 values is pre-configured, or
The base station is allocated to the user's when distributing resource.
5. according to the method for claim 1, it is characterised in that the configuration DMRS pre-set described in the basis side
Formula, the DMRS of user is configured, including：
If the mode of the configuration DMRS distinguishes N1 different user, institute for the orthogonal mask using OCC=N1 on frequency domain
When stating user and independently selecting resource, user demodulated reference signal according to corresponding to corresponding identity selects OCC code words
Subcarrier on symbol is modulated；Wherein, N1 values are pre-configured, or the base station is allocated to the use when distributing resource
Family, or the user calculates according to relevant parameter, the relevant parameter includes geographical location information.
6. according to the method for claim 1, it is characterised in that the configuration DMRS pre-set described in the basis side
Formula, the DMRS of user is configured, including：
If the mode of the configuration DMRS is that the small demodulated reference signal basic sequence of correlation is used in identical spread bandwidth,
Or the different cyclic shifts using identical DMRS basic sequences, then it is near if distance when base station is the user resource allocation
Multiple users distribute same asset or part same asset, then notify to transmit demodulation in the bandwidth of the user after expansion
Reference signal, the bandwidth after extension include the bandwidth that the user uses, and the bandwidth of data division is constant；
The base station indicates that each user uses the less demodulated reference signal basic sequence of cross correlation by configuring extra parameter；
Or identical demodulated reference signal basic sequence is used, and using different cyclic shifts to ensure that demodulation reference is believed between different user
Number orthogonality.
7. according to the method for claim 1, it is characterised in that the configuration DMRS pre-set described in the basis side
Formula, the DMRS of user is configured, including：
If the mode of the configuration DMRS is that the small demodulated reference signal basic sequence of correlation is used in identical spread bandwidth,
Or the different cyclic shifts using identical DMRS basic sequences, then when the user independently selects data resources, in data
Demodulated reference signal is transmitted on the whole available bandwidth of resource pool, data division bandwidth is constant；
The user is pre-configured or by base station configuration and geographic location area relevant parameter, according to described and geographical position area
Domain relevant parameter and used data resource locations determine the demodulated reference signal basic sequence used.
8. according to the method for claim 7, it is characterised in that it is described when the user independently selects data resources,
Demodulated reference signal is transmitted on the whole available bandwidth of data resource pools, data division bandwidth is constant, including：
The user independently selects the bandwidth of the data resource pools where resource to use small configuration, to meet the user whole
Individual bandwidth sends power requirement during demodulated reference signal.
9. according to the method for claim 7, it is characterised in that described in the basis with geographic location area relevant parameter with
And the demodulated reference signal basic sequence that used data resource locations determination uses, including：
Distance is near and uses the less demodulated reference signal of cross correlation using the user of same asset or part same asset
Basic sequence；Or
Distance is near and uses identical demodulated reference signal basic sequence using the user of same asset or part same asset, leads to
Different cyclic shifts is crossed to ensure the orthogonality of demodulated reference signal between different user.
10. according to the method described in claim 2 to 9 any one, it is characterised in that the user is corresponding to data message
Need to indicate the DMRS configuration informations that this user uses in control information, the mode of instruction includes display or implicit；What is indicated is interior
Appearance includes：During using time domain OCC, OCC code words used in instruction；During using frequency domain OCC, N1 sizes used in instruction and
OCC code words；During using spread bandwidth, bandwidth, DMRS basic sequences and cyclic shift used in instruction.
11. DMRS device is configured in a kind of V2X communications, it is characterised in that described device includes：
Acquisition module, for obtaining the configuration DMRS pre-set mode；
Configuration module, for the configuration DMRS mode pre-set according to, configure the DMRS of user；
Wherein, the mode of the configuration DMRS is included in time domain distinguishes 4 different users by OCC=4 orthogonal mask；
And/or it is included on frequency domain and distinguishes N1 different user using OCC=N1 orthogonal mask；And/or it is included in identical expansion
Open up using the demodulated reference signal basic sequence that correlation is small in bandwidth, or, circulated using the difference of identical DMRS basic sequences
Displacement.
12. according to the method for claim 11, it is characterised in that the configuration module, be used for：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, distributing
4 different user distribution same assets or part same asset are up to during resource, and indicates that different user makes by signaling
The 4 demodulated reference signal symbols corresponded to different OCC code words in subframe are modulated.
13. according to the method for claim 11, it is characterised in that the configuration module, be used for：
If the mode of the configuration DMRS distinguishes 4 different users for the orthogonal mask by OCC=4 in time domain, when described
When user independently selects resource, select OCC code words to correspond to 4 demodulated reference signal symbols in subframe according to parameter preset and carry out
Modulation, the parameter preset include identity.
14. according to the method for claim 11, it is characterised in that the configuration module, be used for：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain, divide
During with resource, same asset or part same asset are distributed for most N1 users, and indicate that different user makes by signaling
Subcarrier corresponding to different OCC code words on demodulated reference signal symbol is modulated；Wherein, N1 values is pre-configured, or
The base station is allocated to the user's when distributing resource.
15. according to the method for claim 11, it is characterised in that the configuration module, be used for：
If the mode of the configuration DMRS distinguishes N1 different user for the orthogonal mask using OCC=N1 on frequency domain, when
When the user independently selects resource, according to corresponding to corresponding identity selects OCC code words on demodulated reference signal symbol
Subcarrier be modulated；Wherein, N1 values are pre-configured, or the base station is allocated to the user's when distributing resource.
16. according to the method for claim 1, it is characterised in that the configuration module, be used for：
If the mode of the configuration DMRS is that the small demodulated reference signal basic sequence of correlation is used in identical spread bandwidth,
Or the different cyclic shifts using identical DMRS basic sequences, then when the base station is the user resource allocation, if
Same asset or part same asset are distributed apart near user, then notifies to transmit solution in the bandwidth of the user after expansion
Reference signal is adjusted, the bandwidth after extension includes the bandwidth that the user uses, and the bandwidth of data division is constant；
Indicate that each user uses the less demodulated reference signal basic sequence of cross correlation by configuring extra parameter；Or use phase
With demodulated reference signal basic sequence, and using different cyclic shifts to ensure the orthogonal of demodulated reference signal between different user
Property.
17. according to the method for claim 11, it is characterised in that the configuration module, be used for：
If the mode of the configuration DMRS is that the small demodulated reference signal basic sequence of correlation is used in identical spread bandwidth,
Or the different cyclic shifts using identical DMRS basic sequences, then when the user independently selects data resources, in data
Demodulated reference signal is transmitted on the whole available bandwidth of resource pool, data division bandwidth is constant；
The user it is pre-configured or by the base station configuration with geographic location area relevant parameter in the case of, according to it is described with
Geographic location area relevant parameter and used data resource locations determine the demodulated reference signal basic sequence used.
18. according to the method for claim 17, it is characterised in that the configuration module, be additionally operable to：
The bandwidth of data resource pools where autonomous selection resource should use small configuration, to meet that the user sends out in whole bandwidth
Send power requirement during demodulated reference signal.
19. according to the method for claim 17, it is characterised in that the configuration module, be additionally operable to：
Distance is near and uses the less demodulated reference signal of cross correlation using the user of same asset or part same asset
Basic sequence；Or
Using identical demodulated reference signal basic sequence, by different cyclic shifts to ensure that demodulation reference is believed between different user
Number orthogonality.
20. according to the method described in claim 12 to 19 any one, it is characterised in that the user is corresponding in data message
Control information in need to indicate the DMRS configuration informations that this user uses, the mode of instruction includes display or implicit；Indicate
Content includes：During using time domain OCC, OCC code words used in instruction；During using frequency domain OCC, N1 sizes used in instruction and
OCC code words；During using spread bandwidth, bandwidth, DMRS basic sequences and cyclic shift used in instruction.
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