CN103944662B - a kind of method and system of transmitting uplink demodulation reference signal - Google Patents
a kind of method and system of transmitting uplink demodulation reference signal Download PDFInfo
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- CN103944662B CN103944662B CN201310018556.9A CN201310018556A CN103944662B CN 103944662 B CN103944662 B CN 103944662B CN 201310018556 A CN201310018556 A CN 201310018556A CN 103944662 B CN103944662 B CN 103944662B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
- H04L1/0053—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables specially adapted for power saving
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Abstract
The present invention provides a kind of method and system of transmitting uplink demodulation reference signal.The method, including：It obtains uplink DMRS signals and emits position, and, information is indicated according to the orthogonal covering codes OCC of network side, determines OCC codes related with uplink DMRS signals；According to the transmitting position and OCC codes, emit uplink DMRS signals.
Description
Technical field
The present invention relates to wireless communication field more particularly to a kind of method and systems of transmitting uplink demodulation reference signal.
Background technology
Universal with mobile Internet and smart mobile phone, mobile data flow demand is skyrocketed through.In 10 years following, move
Dynamic data business volume will also double every year, will increase by 1,000 times within 10 years.Data service ratio gradually increases in carrier network,
Conventional telecommunications grade business is affected, still, since data service is according to charge on traffic, growth rate of getting a profit and flow load are not
It is directly proportional.In addition, the data service of rapid growth proposes severe challenge to the transmittability of mobile communications network.It is most
Mobile data services occur mainly in cell (including indoor and hot spot environment), are embodied as nomadic/local wireless access
Scene.According to statistics, the overwhelming majority of mobile data services amount is happened in cell at present, and this ratio will also continue to increase
Long, therefore, there is an urgent need to the data service solutions of the small MPS process of high-speed for operator.
As shown in Figure 1, for existing transmitting uplink demodulation reference signal (Demodulation ReferenceSignal,
Abbreviation DMRS) method schematic diagram.
In long term evolution (Long Term Evolution, abbreviation LTE) system, with normal cyclic prefix (Cyclic
Prefix, abbreviation CP) for length, each sub-frame of uplink includes that two uplink DMRS emit positions, specifically in each subframe
The 4th in range and the 11st orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing,
Abbreviation OFDM) symbol；The final demodulation reference signal sequence of the 4th OFDM symbol position is the OCC that length is 2 within the scope of subframe
The product of 1st complex values of code and the initial DMRS sequences of corresponding position, the 11st OFDM symbol position within the scope of subframe
Final DMRS sequences are the products of the 2nd complex values of the OCC codes that length is 2 and the initial DMRS sequences of corresponding position.
For the data service of current small MPS process, feature includes：User be usually fixed user or
With the user that very low speed moves, user is of less demanding to mobility, has wireless channel delay extension smaller, wireless channel ring
Border changes slower feature；In addition, data service is mainly internet protocol-based (Internet Procotol, abbreviation IP)
Internet service, relatively traditional carrier class business, most of Internet service is to the of less demanding of transmission delay, but to data
Rate it is more demanding.After introducing LTE technologies, since LTE system is mainly used in (500 meters to 100,000 of large coverage
Rice) and a variety of channels (speed can be from 3,000 ms/h to 350,000 m/h, and channel latency never exceeds a microsecond to ten
Several microseconds) environment, it is incompatible with the application environment of the data service of existing small MPS process, therefore, when it carries high data
When rate IP data packet traffics, if still continuing to use the uplink DMRS launching techniques of existing LTE system, holding for DMRS can be brought
Sell excessive, efficiency is relatively low, the excessively high problem of cost.
The uplink DMRS launching techniques of existing LTE system are that each time slot or subframe are required for sending uplink DMRS signals,
Excessive so as to cause the uplink DMRS expenses of cell overlay environment, efficiency is relatively low, the excessively high problem of cost.Therefore, in height
Under data rate cell overlay environment, try to reduce uplink DMRS expenses, lifting system capacity is still the need for needing to solve
It asks.
Invention content
The present invention provides a kind of method and system of transmitting uplink DMRS signals, and technical problems to be solved are how to reduce
Uplink DMRS signal overheads.
In order to solve the above technical problems, the present invention provides following technical solutions：
A method of transmitting uplink demodulation reference signal DMRS, including：
It obtains uplink DMRS signals and emits position, and, information is indicated according to the orthogonal covering codes OCC of network side, is determined
OCC codes related with uplink DMRS signals；
According to the transmitting position and OCC codes, emit uplink DMRS signals.
Preferably, the method also has following features：Uplink DMRS signals transmitting position is launch time window model
Enclose interior at least one orthogonal frequency division multiplex OFDM symbol；Wherein：
Launch time window is the continuous sub-frame of uplink that network side distributes to user side.
Preferably, the method also has following features：Uplink DMRS signals transmitting position is contained in launch time
At least one subframe within the scope of window.
Preferably, the method also has following features：Uplink DMRS signals transmitting position is according to network side
Emit what position indication information determined.
Preferably, the method also has following features：The transmitting position indication information includes subframe position instruction letter
Breath and OFDM symbol position indication information；Wherein：
Include the subframe of uplink DMRS within the scope of subframe position instruction information instruction launch time window；
Actual bearer uplink DMRS within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
The OFDM symbol of signal.
Preferably, the method also has following features：The subframe position instruction information bit is equal to launch time
Window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；Wherein：
Launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.
Preferably, the method also has following features：The OFDM symbol position indication information bit number is equal to subframe
Interior OFDM symbol number, each bit indicate whether the corresponding OFDM symbol within the scope of subframe carries uplink DMRS signals.
Preferably, the method also has following features：The OCC codes are one group that sequence length is equal to transmitting positional number
One in mutually orthogonal complex valued sequence；Wherein：
It is the OFDM symbol number that DMRS signals are carried within the scope of launch time window to emit positional number.
Preferably, the method also has following features：The network side OCC instructions information indicator sequence length is equal to hair
Penetrate a complex valued sequence in one group of mutually orthogonal complex valued sequence of positional number.
Preferably, the method also has following features：The bit number of the network side OCC instructions information is Ceil
(log2(N)), the numerical value of each OCC instructions information indicates a complex valued sequence；Wherein, N is that sequence length is equal to transmitting position
The complex valued sequence number that one group of several mutually orthogonal complex valued sequences includes is set, Ceil expressions round up.
Preferably, the method also has following features：It is described according to the transmitting position and OCC codes, emit uplink
DMRS signals, including：
According to the transmitting position, the first DMRS sequences of each transmitting position are obtained, wherein sequence length is equal to network
Distribute to the continuous sub-carrier number of user side in side；
By the first DMRS sequences of each complex values and each transmitting position that the length is the OCC codes for emitting positional number
It is corresponding to be multiplied, to obtain the 2nd DMRS sequences of each transmitting position；
2nd DMRS sequences of each transmitting position are mapped to the transmitting position, and are emitted.
A kind of system of transmitting uplink demodulation reference signal DMRS, including：
Acquisition device emits position for obtaining uplink DMRS signals, and, according to the orthogonal covering codes OCC of network side
It indicates information, determines OCC codes related with uplink DMRS signals；
Emitter, for according to the transmitting position and OCC codes, emitting uplink DMRS signals.
Preferably, the system also has following features：Uplink DMRS signals transmitting position is launch time window model
Enclose interior at least one orthogonal frequency division multiplex OFDM symbol；Wherein：
Launch time window is the continuous sub-frame of uplink that network side distributes to user side.
Preferably, the system also has following features：Uplink DMRS signals transmitting position is contained in launch time
At least one subframe within the scope of window.
Preferably, the system also has following features：Uplink DMRS signals transmitting position is according to network side
Emit what position indication information determined.
Preferably, the system also has following features：The transmitting position indication information includes subframe position instruction letter
Breath and OFDM symbol position indication information；Wherein：
Include the subframe of uplink DMRS within the scope of subframe position instruction information instruction launch time window；
Actual bearer uplink DMRS within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
The OFDM symbol of signal.
Preferably, the system also has following features：The subframe position instruction information bit is equal to launch time
Window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；Wherein：
Launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.
Preferably, the system also has following features：The OFDM symbol position indication information bit number is equal to subframe
Interior OFDM symbol number, each bit indicate whether the corresponding OFDM symbol within the scope of subframe carries uplink DMRS signals.
Preferably, the system also has following features：The OCC codes are one group that sequence length is equal to transmitting positional number
One in mutually orthogonal complex valued sequence；Wherein：
It is the OFDM symbol number that DMRS signals are carried within the scope of launch time window to emit positional number.
Preferably, the system also has following features：The network side OCC instructions information indicator sequence length is equal to hair
Penetrate a complex valued sequence in one group of mutually orthogonal complex valued sequence of positional number.
Preferably, the system also has following features：The bit number of the network side OCC instructions information is Ceil
(log2(N)), the numerical value of each OCC instructions information indicates a complex valued sequence；Wherein, N is that sequence length is equal to transmitting position
The complex valued sequence number that one group of several mutually orthogonal complex valued sequences includes is set, Ceil expressions round up.
Preferably, the system also has following features：The emitter includes：
Acquisition module, for according to the transmitting position, obtaining the first DMRS sequences of each transmitting position, wherein sequence
Row length is equal to the continuous sub-carrier number that network side distributes to user side；
Computing module is connected with the acquisition module, for being that each of OCC codes for emitting positional number are multiple by the length
Numerical value should be multiplied with the first DMRS sequence pairs of each transmitting position, to obtain the 2nd DMRS sequences of each transmitting position；
Transmitting module is connected with the computing module, for the 2nd DMRS sequences of each transmitting position to be mapped to institute
Transmitting position is stated, and is emitted.
Embodiment provided by the invention, for the prior art under the scene that data service cell covering part is affixed one's name to uplink
DMRS expenses are excessive, and efficiency is relatively low, the excessively high problem of cost, emit uplink DMRS signals according to transmitting position and OCC codes, reach
The expense of uplink DMRS signals is reduced, and promotes the effect of the small MPS process capacity of uplink.
Description of the drawings
Fig. 1 is the schematic diagram for emitting uplink DMRS methods in the prior art；
Fig. 2 is the flow chart of the embodiment of the method for transmitting uplink DMRS provided by the invention；
Fig. 3 is the schematic diagram for the transmitting uplink DMRS methods that the embodiment of the present invention one provides；
Fig. 4 is the schematic diagram of transmitting uplink DMRS methods provided by Embodiment 2 of the present invention；
Fig. 5 is the schematic diagram for the transmitting uplink DMRS methods that the embodiment of the present invention three provides；
Fig. 6 is the structure chart of the system embodiment of transmitting uplink DMRS provided by the invention.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.It should be noted that in the absence of conflict, the embodiment in the application and implementation
Feature in example mutually can be combined arbitrarily.
Fig. 2 is the flow chart of the embodiment of the method for transmitting uplink DMRS provided by the invention.Embodiment of the method shown in Fig. 2,
Including：
Step 201 obtains uplink DMRS signals transmitting position, and, according to the orthogonal covering codes OCC instruction letters of network side
Breath determines OCC codes related with uplink DMRS signals；
Step 202, according to the transmitting position and OCC codes, emit uplink DMRS signals.
Embodiment of the method provided by the invention, for the prior art data service cell covering part affix one's name to scene under uplink
DMRS expenses are excessive, and efficiency is relatively low, the excessively high problem of cost, emit uplink DMRS signals according to transmitting position and OCC codes, reach
The expense of uplink DMRS signals is reduced, and promotes the effect of the small MPS process capacity of uplink.
Embodiment of the method provided by the invention is described further below：
The present invention is illustrated with following application scenarios, the application scenarios include at least one base station (network side equipment, such as
ENode B) and at least one mobile station (user side equipment, such as UE), wherein base station, which has to send at least one mobile station, to be controlled
Information and user data, the function of receiving control information and user data that at least one mobile station is sent.
Embodiment one：
As shown in figure 3, the schematic diagram of the transmitting uplink DMRS methods for embodiment one；Wherein, twill indicates uplink DMRS
Emit position, non-twill indicates that upstream data emits position.
Assuming that normal CP length, and launch time window is subframe 1 and subframe 2.
Wherein, the launch time window refers to the continuous subframe that network side distributes to user side.
The transmitting position of uplink DMRS signals can determine by two ways, including：
Network side consults uplink DMRS signals transmitting position in advance with user, then each user is obtaining transmitting position
When, it can directly be determined according to the result consulted；Alternatively,
According to the transmitting position indication information of network side, determine that uplink DMRS signals emit position.
Wherein, the transmitting position is at least one OFDM symbol within the scope of launch time window；It is thus determined that uplink
The transmitting position of DMRS signals is equivalent to determine the subframe for including uplink DMRS signals within the scope of launch time window, and is wrapping
The OFDM symbol of actual bearer uplink DMRS signals within the scope of the subframe of the signals of DMRS containing uplink.
Wherein, the transmitting position indication information includes：Subframe position indicates information and OFDM symbol position indication information.
Wherein：
Include the subframe of DMRS signals within the scope of subframe position instruction information instruction launch time window；Its bit number is equal to
Launch time window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；
Wherein, launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.In the present embodiment, subframe position
Setting instruction information is carried by 2 bits, and each bit corresponds to a subframe, and specific value is " 11 ", wherein bit quilt
It is set to " 1 ", indicates that corresponding subframe includes uplink DMRS signals, otherwise, indicates that corresponding subframe does not include uplink DMRS signals, that is,
Subframe 1 and subframe 2 all include uplink DMRS signals.
Actual bearer uplink DMRS within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
The OFDM symbol of signal；Its bit number is equal to the OFDM symbol number in subframe, and each bit instruction includes uplink DMRS signals
Subframe within the scope of corresponding OFDM symbol whether carry uplink DMRS signals.In the present embodiment, OFDM symbol position instruction
Information includes 14 bits, and each bit corresponds to an OFDM symbol, and specific value is " 00000010000000 ", wherein ratio
Spy is set to " 1 ", indicates corresponding OFDM symbol carrying uplink DMRS signals, otherwise indicates that corresponding OFDM symbol does not carry uplink
DMRS signals, that is, subframe 1 be used to carry uplink DMRS signals with the 7th OFDM symbol in subframe 2.
Wherein, the transmitting position indication information of the network side can be carried on the proprietary downlink physical control signaling of user
Or in the proprietary downlink system message of user.
In the present embodiment, determine that transmitting position is the 7th OFDM symbol of each subframe.
OCC codes related with uplink DMRS signals are determined according to network side OCC instruction information.
Wherein, the OCC codes are that sequence length is equal in one group of mutually orthogonal complex valued sequence of transmitting positional number
One, wherein transmitting positional number is the OFDM symbol number that uplink DMRS signals are carried within the scope of launch time window.
Wherein, network side OCC instruction information indicator sequence length be equal to one group of transmitting positional number it is mutually orthogonal
A complex valued sequence in complex valued sequence；The bit number of network side OCC instruction information is Ceil (log2(N)), each
OCC indicates that the numerical value of information indicates a complex valued sequence；Wherein, N is that sequence length is mutual equal to emit positional number one group
The complex valued sequence number that orthogonal complex valued sequence includes, Ceil expressions round up.
In the present embodiment, transmitting positional number is 2, therefore OCC length is 2；In addition, due to length be 2 one group of phase
The complex valued sequence number that mutually orthogonal complex valued sequence includes is usually designed to two, specially sequence [1,1] and sequence
[1, -1], network side OCC instruction information includes Ceil (log2(N)) it is equal to 1 bit, specific value is " 0 ", wherein bit
It is set to " 0 ", indicates that sequence [1,1] is used as OCC codes, be set to " 1 ", indicate that sequence [1, -1] is used as OCC codes.
Wherein, the network side OCC instruction information can be carried on the proprietary downlink physical control signaling of user or
In the proprietary downlink system message of user.
In the present embodiment, determine that OCC codes related with uplink DMRS signals are [1,1].
Emit position (being specially the 7th OFDM symbol of subframe 1 and subframe 2) according to the DMRS (is specially with OCC codes
[1,1]) transmitting uplink DMRS signals.Including：
First, the first DMRS sequences of subframe 1 and 2 the 7th OFDM symbols are obtained respectively.
Wherein, sequence length is equal to the continuous sub-carrier number that network side distributes to user side.
Wherein, the first DMRS sequences are defined as the cyclic shift of DMRS basic sequences, and cyclic shift digit is by following
Ring shifts indexing parameter and determines；In addition, the DMRS basic sequences are defined as the largest prime M less than or equal to sequence lengthZCIt is long
The cyclic extensions of the ZC sequences of degree, and less than or equal to the largest prime M of sequence lengthZCThe ZC sequences of length share MZC- 1,
Specifically used MZCWhich of -1 basic sequence is determined by DMRS basic sequence indexing parameters.Therefore, in order to determine specific sequence
The specific first DMRS sequences of row length (equal to the continuous sub-carrier number that network side distributes to user side) need to obtain motif
Column index is indexed with cyclic shift.In systems in practice, motif column index and cyclic shift index usually emit position with DMRS
There are mapping relations, different DMRS transmittings position usually corresponds to the first different DMRS sequences.
Then, each complex values that the length is the OCC codes for emitting positional number are emitted into the first DMRS of position with each
Sequence pair should be multiplied, specific as follows to obtain the 2nd DMRS sequences of each transmitting position：It will be in OCC codes (being specially [1,1])
The first DMRS sequences of the 7th OFDM symbol of the 1st complex values ([1]) and subframe 1 be multiplied, to obtain the 7th OFDM of subframe 1
2nd DMRS sequences of symbol；The 7th OFDM of the 2nd complex values ([1]) and subframe 2 in OCC codes (being specially [1,1]) is accorded with
Number the first DMRS sequences be multiplied, to obtain the 2nd DMRS sequences of the 7th OFDM symbol of subframe 2.In the present embodiment, due to
It is 2 to emit positional number, and the OCC codes used are ([1,1]), then the 2nd DMRS sequences etc. of the 7th OFDM symbol of subframe 1
It is equal to subframe 2 in the 2nd DMRS sequences of the first DMRS sequences of the 7th OFDM symbol of subframe 1, the 7th OFDM symbol of subframe 2
First DMRS sequences of the 7th OFDM symbol.
Finally, by the 2nd DMRS sequences of the 7th OFDM symbol of subframe 1, it is mapped to the 7th OFDM symbol position of subframe 1,
And emit；The 7th the 2nd DMRS sequence of OFDM symbol of subframe 2 is mapped to the 7th OFDM symbol position of subframe 2, and is emitted.
Embodiment two：
As shown in figure 4, the schematic diagram of the transmitting uplink DMRS methods for embodiment two；Wherein, twill indicates uplink DMRS
Emit position, non-twill indicates that upstream data emits position.
Assuming that normal CP length, and launch time window is subframe 1, subframe 2 and subframe 3.
Wherein, the launch time window refers to the continuous subframe that network side distributes to user side.
The transmitting position of uplink DMRS signals can determine by two ways, including：
Network side consults uplink DMRS signals transmitting position in advance with user, then each user is obtaining transmitting position
When, it can directly be determined according to the result consulted；Alternatively,
According to the transmitting position indication information of network side, determine that uplink DMRS signals emit position.
Wherein, the transmitting position is at least one OFDM symbol within the scope of launch time window；It is thus determined that uplink
The transmitting position of DMRS signals is equivalent to determine the subframe for including uplink DMRS signals within the scope of launch time window, and is wrapping
The OFDM symbol of actual bearer uplink DMRS signals within the scope of the subframe of the signals of DMRS containing uplink.
Wherein, the transmitting position indication information includes：Subframe position indicates information and OFDM symbol position indication information.
Wherein：
Include the subframe of DMRS signals within the scope of subframe position instruction information instruction launch time window；Its bit number is equal to
Launch time window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；
Wherein, launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.In the present embodiment, subframe position
Setting instruction information is carried by 3 bits, and each bit corresponds to a subframe, and specific value is " 101 ", wherein bit
It is set to " 1 ", indicates that corresponding subframe includes uplink DMRS signals, otherwise, indicates that corresponding subframe does not include uplink DMRS signals,
That is, subframe 1 and subframe 3 all include uplink DMRS signals.
Actual bearer uplink DMRS within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
The OFDM symbol of signal；Its bit number is equal to the OFDM symbol number in subframe, and each bit instruction includes uplink DMRS signals
Subframe within the scope of corresponding OFDM symbol whether carry uplink DMRS signals.In the present embodiment, OFDM symbol position instruction
Information includes 14 bits, and each bit corresponds to an OFDM symbol, and specific value is " 00000010000000 ", wherein ratio
Spy is set to " 1 ", indicates corresponding OFDM symbol carrying uplink DMRS signals, otherwise indicates that corresponding OFDM symbol does not carry uplink
DMRS signals, that is, subframe 1 be used to carry uplink DMRS signals with the 7th OFDM symbol in subframe 3.
Wherein, the transmitting position indication information of the network side can be carried on the proprietary downlink physical control signaling of user
Or in the proprietary downlink system message of user.
In the present embodiment, determine that transmitting position is subframe 1 and 3 the 7th OFDM symbols.
OCC codes related with uplink DMRS signals are determined according to network side OCC instruction information.
Wherein, the OCC codes are that sequence length is equal in one group of mutually orthogonal complex valued sequence of transmitting positional number
One, wherein transmitting positional number is the OFDM symbol number that uplink DMRS signals are carried within the scope of launch time window.
Wherein, network side OCC instruction information indicator sequence length be equal to one group of transmitting positional number it is mutually orthogonal
A complex valued sequence in complex valued sequence；The bit number of network side OCC instruction information is Ceil (log2(N)), each
OCC indicates that the numerical value of information indicates a complex valued sequence；Wherein, N is that sequence length is mutual equal to emit positional number one group
The complex valued sequence number that orthogonal complex valued sequence includes, Ceil expressions round up.
In the present embodiment, transmitting positional number is 2, therefore OCC length is 2；In addition, due to length be 2 one group of phase
The complex valued sequence number that mutually orthogonal complex valued sequence includes is usually designed to two, specially sequence [1,1] and sequence
[1, -1], network side OCC instruction information includes Ceil (log2(N)) it is equal to 1 bit, specific value is " 1 ", wherein bit
It is set to " 0 ", indicates that sequence [1,1] is used as OCC codes, be set to " 1 ", indicate that sequence [1, -1] is used as OCC codes.
Wherein, the network side OCC instruction information can be carried on the proprietary downlink physical control signaling of user or
In the proprietary downlink system message of user.
In the present embodiment, determine that OCC codes related with uplink DMRS signals are [1, -1].
Emit position (being specially the 7th OFDM symbol of subframe 1 and subframe 3) according to the DMRS (is specially with OCC codes
[1, -1]) transmitting uplink DMRS signals.Including：
First, the first DMRS sequences of subframe 1 and 3 the 7th OFDM symbols are obtained respectively.
Wherein, sequence length is equal to the continuous sub-carrier number that network side distributes to user side.
Wherein, the first DMRS sequences are defined as the cyclic shift of DMRS basic sequences, and cyclic shift digit is by following
Ring shifts indexing parameter and determines；In addition, the DMRS basic sequences are defined as the largest prime M less than or equal to sequence lengthZCIt is long
The cyclic extensions of the ZC sequences of degree, and less than or equal to the largest prime M of sequence lengthZCThe ZC sequences of length share MZC- 1,
Specifically used MZCWhich of -1 basic sequence is determined by DMRS basic sequence indexing parameters.Therefore, in order to determine specific sequence
The specific first DMRS sequences of row length (equal to the continuous sub-carrier number that network side distributes to user side) need to obtain motif
Column index is indexed with cyclic shift.In systems in practice, motif column index and cyclic shift index usually emit position with DMRS
There are mapping relations, different DMRS transmittings position usually corresponds to the first different DMRS sequences.
Then, each complex values that the length is the OCC codes for emitting positional number are emitted into the first DMRS of position with each
Sequence pair should be multiplied, specific as follows to obtain the 2nd DMRS sequences of each transmitting position：By OCC codes (being specially [1, -1])
In the first DMRS sequences of the 7th OFDM symbol of the 1st complex values ([1]) and subframe 1 be multiplied, to obtain subframe 1 the 7th
2nd DMRS sequences of OFDM symbol；By in OCC codes (be specially [1, -1]) the 2nd complex values ([- 1]) and subframe 3 the 7th
The first DMRS sequences of OFDM symbol are multiplied, to obtain the 2nd DMRS sequences of the 7th OFDM symbol of subframe 3.In the present embodiment,
Since transmitting positional number is 2, and the OCC codes used are ([1, -1]), then the 7th the 2nd DMRS sequence of OFDM symbol of subframe 1
Row are equal to the 7th the first DMRS sequence of OFDM symbol of subframe 1, and the 7th the 2nd DMRS sequence of OFDM symbol of subframe 3 is equal to subframe 3
7th the first DMRS sequence of OFDM symbol negates.
Finally, by the 2nd DMRS sequences of the 7th OFDM symbol of subframe 1, it is mapped to the 7th OFDM symbol position of subframe 1,
And emit；The 7th the 2nd DMRS sequence of OFDM symbol of subframe 3 is mapped to the 7th OFDM symbol position of subframe 3, and is emitted.
Embodiment three：
As shown in figure 5, the schematic diagram of the transmitting uplink DMRS methods for embodiment three；Wherein, twill indicates uplink DMRS
Emit position, non-twill indicates that upstream data emits position.
Assuming that normal CP length, and launch time window is subframe 1, subframe 2 and subframe 3.
Wherein, the launch time window refers to the continuous subframe that network side distributes to user side.
The transmitting position of uplink DMRS signals can determine by two ways, including：
Network side consults uplink DMRS signals transmitting position in advance with user, then each user is obtaining transmitting position
When, it can directly be determined according to the result consulted；Alternatively,
According to the transmitting position indication information of network side, determine that uplink DMRS signals emit position.
Wherein, the transmitting position is at least one OFDM symbol within the scope of launch time window；It is thus determined that uplink
The transmitting position of DMRS signals is equivalent to determine the subframe for including uplink DMRS signals within the scope of launch time window, and is wrapping
The OFDM symbol of actual bearer uplink DMRS signals within the scope of the subframe of the signals of DMRS containing uplink.
Wherein, the transmitting position indication information includes：Subframe position indicates information and OFDM symbol position indication information.
Wherein：
Include the subframe of DMRS signals within the scope of subframe position instruction information instruction launch time window；Its bit number is equal to
Launch time window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；
Wherein, launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.In the present embodiment, subframe position
Setting instruction information is carried by 3 bits, and each bit corresponds to a subframe, and specific value is " 111 ", wherein bit
It is set to " 1 ", indicates that corresponding subframe includes uplink DMRS signals, otherwise, indicates that corresponding subframe does not include uplink DMRS signals,
That is, subframe 1 all includes uplink DMRS signals to subframe 3.
Actual bearer uplink DMRS within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
The OFDM symbol of signal；Its bit number is equal to the OFDM symbol number in subframe, and each bit instruction includes uplink DMRS signals
Subframe within the scope of corresponding OFDM symbol whether carry uplink DMRS signals.In the present embodiment, OFDM symbol position instruction
Information includes 14 bits, and each bit corresponds to an OFDM symbol, and specific value is " 00000010000000 ", wherein ratio
Spy is set to " 1 ", indicates corresponding OFDM symbol carrying uplink DMRS signals, otherwise indicates that corresponding OFDM symbol does not carry uplink
DMRS signals, that is, the 7th OFDM symbol in subframe 1 to subframe 3 be used to carry uplink DMRS signals.
Wherein, the transmitting position indication information of the network side can be carried on the proprietary downlink physical control signaling of user
Or in the proprietary downlink system message of user.
In the present embodiment, determine that transmitting position is the 7th OFDM symbol of each subframe.
OCC codes related with uplink DMRS signals are determined according to network side OCC instruction information.
Wherein, the OCC codes are that sequence length is equal in one group of mutually orthogonal complex valued sequence of transmitting positional number
One, wherein transmitting positional number is the OFDM symbol number that uplink DMRS signals are carried within the scope of launch time window.
Wherein, network side OCC instruction information indicator sequence length be equal to one group of transmitting positional number it is mutually orthogonal
A complex valued sequence in complex valued sequence；The bit number of network side OCC instruction information is Ceil (log2(N)), each
OCC indicates that the numerical value of information indicates a complex valued sequence；Wherein, N is that sequence length is mutual equal to emit positional number one group
The complex valued sequence number that orthogonal complex valued sequence includes, Ceil expressions round up.
In the present embodiment, transmitting positional number is 3, therefore OCC length is 3；In addition, due to length be 3 one group of phase
The complex valued sequence number that mutually orthogonal complex valued sequence includes is usually designed to 3, specially sequence [1,1,1], sequence
[1, ej2π/3, ej4π/3] and sequence [1, ej4π/3, ej2π/3], network side OCC instruction information includes Ceil (log2(N)) it is equal to 2 ratios
Spy, specific value are " 00 ", wherein bit is set to " 00 ", is indicated that sequence [1,1,1] is used as OCC codes, is set to " 01 ",
Indicate sequence [1, ej2π/3, ej4π/3] it is used as OCC codes, it is set to " 10 ", indicates sequence [1, ej4π/3, ej2π/3] it is used as OCC
Code.
Wherein, the network side OCC instruction information can be carried on the proprietary downlink physical control signaling of user or
In the proprietary downlink system message of user.
In the present embodiment, determine that OCC codes related with uplink DMRS signals are [1,1,1].
According to the DMRS emit position the 7th OFDM symbol of each subframe (be specially) and OCC codes (specially [1,
1,1]) emit uplink DMRS signals.Including：
First, the first DMRS sequences of the 7th OFDM symbol of each subframe are obtained respectively.
Wherein, sequence length is equal to the continuous sub-carrier number that network side distributes to user side.
Wherein, the first DMRS sequences are defined as the cyclic shift of DMRS basic sequences, and cyclic shift digit is by following
Ring shifts indexing parameter and determines；In addition, the DMRS basic sequences are defined as the largest prime M less than or equal to sequence lengthZCIt is long
The cyclic extensions of the ZC sequences of degree, and less than or equal to the largest prime M of sequence lengthZCThe ZC sequences of length share MZC- 1,
Specifically used MZCWhich of -1 basic sequence is determined by DMRS basic sequence indexing parameters.Therefore, in order to determine specific sequence
The specific first DMRS sequences of row length (equal to the continuous sub-carrier number that network side distributes to user side) need to obtain motif
Column index is indexed with cyclic shift.In systems in practice, motif column index and cyclic shift index usually emit position with DMRS
There are mapping relations, different DMRS transmittings position usually corresponds to the first different DMRS sequences.
Then, each complex values that the length is the OCC codes for emitting positional number are emitted into the first DMRS of position with each
Sequence pair should be multiplied, specific as follows to obtain the 2nd DMRS sequences of each transmitting position：By OCC codes (being specially [1,1,1])
In the 7th the first DMRS sequence of OFDM symbol of the 1st complex values ([1]) and subframe 1 be multiplied, to obtain the 7th OFDM of subframe 1
The 2nd DMRS sequences of symbol；The 7th OFDM of the 2nd complex values ([1]) and subframe 2 in OCC codes (being specially [1,1,1]) is accorded with
Number the first DMRS sequences are multiplied, to obtain the 7th the 2nd DMRS sequence of OFDM symbol of subframe 2；By OCC codes (be specially [1,1,
1] the 7th the first DMRS sequence of OFDM symbol of the 3rd complex values ([1]) and subframe 3 is multiplied in), to obtain subframe 3 the 7th
The 2nd DMRS sequences of OFDM symbol.
In the present embodiment, since transmitting positional number is 3, and the OCC codes used are ([1,1,1]), then subframe 1 the 7th
The 2nd DMRS sequences of a OFDM symbol are equal to the 7th the first DMRS sequence of OFDM symbol of subframe 1, the 7th OFDM symbol of subframe 2 the
Two DMRS sequences are equal to the 7th the first DMRS sequence of OFDM symbol of subframe 2, the 7th the 2nd DMRS sequence of OFDM symbol of subframe 3 etc.
In the 7th the first DMRS sequence of OFDM symbol of subframe 3.
Finally, the 7th the 2nd DMRS sequence of OFDM symbol of subframe 1 is mapped to the 7th OFDM symbol position of subframe 1, and
Transmitting；The 7th the 2nd DMRS sequence of OFDM symbol of subframe 2 is mapped to the 7th OFDM symbol position of subframe 2, and is emitted；It will be sub
The 7th the 2nd DMRS sequence of OFDM symbol of frame 3 is mapped to the 7th OFDM symbol position of subframe 3, and emits.
About the present invention or above-described embodiment, it is also necessary to which additional description is：
Since launch time window or wireless channel conditions may change, allow uplink DMRS signal transmitting methods half
Statically or dynamically change；For example, in some time interval, user side uses the uplink DMRS signals based on embodiment one
Launching technique, and in another time interval, user side uses the uplink DMRS signal transmitting methods based on embodiment two.
The user side transmission number of plies of single layer is conceived to, wherein the transmission number of plies is also known as wireless communication between network side and user side
The order (RANK) in road, shows the individual transmission channel number currently supported.Pay attention to：If it is X (＞ 1) that the number of plies is transmitted in actual user side
Above-mentioned X transport layer can then be regarded as the X different user that can share identical uplink DMRS signals transmitting position by layer.
Allow the different subframes comprising uplink DMRS signals that there is different uplink DMRS signals transmitting positional numbers, at this point, more than one
The OFDM symbol position indication information be required, wherein each OFDM symbol position indication information instruction includes uplink
Within the scope of one subframe of DMRS signals, alternatively, within the scope of each subframe of a subframe subset comprising uplink DMRS signals,
The OFDM symbol of actual bearer uplink DMRS signals.
Fig. 6 is the structure chart of the system embodiment of transmitting uplink DMRS provided by the invention.System shown in Figure 6 embodiment,
Including：
Acquisition device 601 emits position for obtaining uplink DMRS signals, and, according to network side orthogonal covering codes OCC
It indicates information, determines OCC codes related with uplink DMRS signals；
Emitter 602, for emitting uplink DMRS signals according to transmitting position and OCC codes.
Wherein：
Uplink DMRS signals transmitting position is at least one OFDM symbol within the scope of launch time window；Wherein：
Launch time window is the continuous sub-frame of uplink that network side distributes to user side.
DMRS signals transmitting position is contained at least one subframe within the scope of launch time window.
DMRS signals transmitting position is to emit position indication information according to network side to determine.
The transmitting position indication information includes subframe position instruction information and OFDM symbol position indication information；Wherein：
Include the subframe of uplink DMRS within the scope of subframe position instruction information instruction launch time window；
Actual bearer uplink DMRS within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
The OFDM symbol of signal.
The subframe position instruction information bit is equal to launch time window size, and each bit instruction is in launch time window
Whether the corresponding subframe in range includes uplink DMRS signals；Wherein：
Launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.
The OFDM symbol position indication information bit number is equal to OFDM symbol number in subframe, and each bit indicates subframe model
Whether the corresponding OFDM symbol in enclosing carries uplink DMRS signals.
The OCC codes are one that sequence length is equal in one group of mutually orthogonal complex valued sequence of transmitting positional number；
Wherein：
It is the OFDM symbol number that DMRS signals are carried within the scope of launch time window to emit positional number.
The network side OCC instructions information indicator sequence length is equal to one group of mutually orthogonal complex values of transmitting positional number
A complex valued sequence in sequence.
The network side OCC instructions information bit number is Ceil (log2(N)), the numerical tabular of each OCC instructions information
Show a complex valued sequence；Wherein, N is that sequence length includes equal to transmitting one group of mutually orthogonal complex valued sequence of positional number
Complex valued sequence number, Ceil expressions round up.
The emitter includes：
Acquisition module, for according to the transmitting position, obtaining the first DMRS sequences of each transmitting position；Wherein：
Sequence length is equal to the continuous sub-carrier number that network side distributes to user side；
Computing module is connected with the acquisition module, for being that each of OCC codes for emitting positional number are multiple by the length
Numerical value should be multiplied with the first DMRS sequence pairs of each transmitting position, to obtain the 2nd DMRS sequences of each transmitting position；
Transmitting module is connected with the computing module, for the 2nd DMRS sequences of each transmitting position to be mapped to institute
Transmitting position is stated, and is emitted.
System embodiment provided by the invention, for the prior art data service cell covering part affix one's name to scene under uplink
DMRS expenses are excessive, and efficiency is relatively low, the excessively high problem of cost, emit uplink DMRS signals according to transmitting position and OCC codes, reach
The expense of uplink DMRS signals is reduced, and promotes the effect of the small MPS process capacity of uplink.
One of ordinary skill in the art will appreciate that all or part of step of above-described embodiment can use computer journey
Sequence flow realizes that the computer program can be stored in a computer readable storage medium, the computer program exists
(such as system, unit, device) executes on corresponding hardware platform, when being executed, include the steps that embodiment of the method it
One or combinations thereof.
Optionally, all or part of step of above-described embodiment can also realize that these steps can using integrated circuit
To be fabricated to integrated circuit modules one by one respectively, or by them multiple modules or step be fabricated to single integrated electricity
Road module is realized.In this way, the present invention is not limited to any specific hardware and softwares to combine.
General computing device may be used to realize in each device/function module/functional unit in above-described embodiment, it
Can be concentrated on a single computing device, can also be distributed on network constituted by multiple computing devices.
Each device/function module/functional unit in above-described embodiment realized in the form of software function module and as
Independent product sale in use, can be stored in a computer read/write memory medium.Computer mentioned above
Read/write memory medium can be read-only memory, disk or CD etc..
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection domain described in claim.
Claims (20)
1. a kind of method of transmitting uplink demodulation reference signal DMRS, which is characterized in that including：
Obtain uplink DMRS signals and emit position, and, information is indicated according to the orthogonal covering codes OCC of network side, determine with it is upper
The related OCC codes of row DMRS signals；
According to the transmitting position and OCC codes, emit uplink DMRS signals；Wherein, uplink DMRS signals transmitting position is
At least one orthogonal frequency division multiplex OFDM symbol within the scope of launch time window；Launch time window is that network side distributes to user side
Continuous sub-frame of uplink.
2. according to the method described in claim 1, it is characterized in that, when uplink DMRS signals transmitting position is contained in transmitting
Between at least one subframe within the scope of window.
3. according to the method described in claim 1, it is characterized in that, uplink DMRS signals transmitting position is according to network side
Transmitting position indication information determine.
4. according to the method described in claim 3, it is characterized in that, the transmitting position indication information includes subframe position instruction
Information and OFDM symbol position indication information；Wherein：
Include the subframe of uplink DMRS within the scope of subframe position instruction information instruction launch time window；
Actual bearer uplink DMRS signals within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
OFDM symbol.
5. according to the method described in claim 4, it is characterized in that, when subframe position instruction information bit is equal to transmitting
Between window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；Wherein：
Launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.
6. according to the method described in claim 4, it is characterized in that, the OFDM symbol position indication information bit number is equal to son
OFDM symbol number in frame, each bit indicate whether the corresponding OFDM symbol within the scope of subframe carries uplink DMRS signals.
7. according to the method described in claim 1, it is characterized in that, the OCC codes, which are sequence length, is equal to transmitting positional number
One in one group of mutually orthogonal complex valued sequence；Wherein：
It is the OFDM symbol number that DMRS signals are carried within the scope of launch time window to emit positional number.
8. the method according to the description of claim 7 is characterized in that network side OCC instruction information indicator sequence length etc.
A complex valued sequence in one group of mutually orthogonal complex valued sequence of transmitting positional number.
9. according to the method described in claim 8, it is characterized in that, the bit number of network side OCC instruction information is
Ceil(log2(N)), the numerical value of each OCC instructions information indicates a complex valued sequence；Wherein, N is that sequence length is equal to hair
The complex valued sequence number that one group of mutually orthogonal complex valued sequence of positional number includes is penetrated, Ceil expressions round up.
10. according to the method described in claim 1, it is characterized in that, described according to the transmitting position and OCC codes, in transmitting
Row DMRS signals, including：
According to the transmitting position, the first DMRS sequences of each transmitting position are obtained, wherein sequence length is equal to network side point
The continuous sub-carrier number of provisioned user side；
Each complex values and the first DMRS sequence pairs of each transmitting position that the length is the OCC codes for emitting positional number are answered
It is multiplied, to obtain the 2nd DMRS sequences of each transmitting position；
2nd DMRS sequences of each transmitting position are mapped to the transmitting position, and are emitted.
11. a kind of system of transmitting uplink demodulation reference signal DMRS, which is characterized in that including：
Acquisition device emits position for obtaining uplink DMRS signals, and, according to the orthogonal covering codes OCC instructions of network side
Information determines OCC codes related with uplink DMRS signals；
Emitter, for according to the transmitting position and OCC codes, emitting uplink DMRS signals；Wherein, the uplink DMRS letters
Number transmitting position be launch time window within the scope of at least one orthogonal frequency division multiplex OFDM symbol；Launch time window is network side point
The continuous sub-frame of uplink of provisioned user side.
12. system according to claim 11, which is characterized in that uplink DMRS signals transmitting position is contained in transmitting
At least one subframe within the scope of time window.
13. system according to claim 11, which is characterized in that uplink DMRS signals transmitting position is according to network
What the transmitting position indication information of side determined.
14. system according to claim 13, which is characterized in that the transmitting position indication information includes that subframe position refers to
Show information and OFDM symbol position indication information；Wherein：
Include the subframe of uplink DMRS within the scope of subframe position instruction information instruction launch time window；
Actual bearer uplink DMRS signals within the scope of subframe of the OFDM symbol position indication information instruction comprising uplink DMRS signals
OFDM symbol.
15. system according to claim 14, which is characterized in that the subframe position instruction information bit is equal to transmitting
Time window size, whether corresponding subframe of each bit instruction within the scope of launch time window includes uplink DMRS signals；Wherein：
Launch time window size is the continuous sub-frame of uplink number that network side distributes to user side.
16. system according to claim 14, which is characterized in that the OFDM symbol position indication information bit number is equal to
OFDM symbol number in subframe, each bit indicate whether the corresponding OFDM symbol within the scope of subframe carries uplink DMRS signals.
17. system according to claim 11, which is characterized in that the OCC codes are that sequence length is equal to transmitting positional number
One group of mutually orthogonal complex valued sequence in one；Wherein：
It is the OFDM symbol number that DMRS signals are carried within the scope of launch time window to emit positional number.
18. system according to claim 17, which is characterized in that the network side OCC indicates information indicator sequence length
Equal to a complex valued sequence in one group of mutually orthogonal complex valued sequence of transmitting positional number.
19. system according to claim 18, which is characterized in that the network side OCC indicates that the bit number of information is
Ceil(log2(N)), the numerical value of each OCC instructions information indicates a complex valued sequence；Wherein, N is that sequence length is equal to hair
The complex valued sequence number that one group of mutually orthogonal complex valued sequence of positional number includes is penetrated, Ceil expressions round up.
20. system according to claim 11, which is characterized in that the emitter includes：
Acquisition module, for according to the transmitting position, obtaining the first DMRS sequences of each transmitting position, wherein sequence is long
Degree is equal to the continuous sub-carrier number that network side distributes to user side；
Computing module is connected with the acquisition module, is used for each complex values for the OCC codes that the length is transmitting positional number
It should be multiplied with the first DMRS sequence pairs of each transmitting position, to obtain the 2nd DMRS sequences of each transmitting position；
Transmitting module is connected with the computing module, for the 2nd DMRS sequences of each transmitting position to be mapped to the hair
Position is penetrated, and is emitted.
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| CN201310018556.9A CN103944662B (en) | 2013-01-18 | 2013-01-18 | a kind of method and system of transmitting uplink demodulation reference signal |
| PCT/CN2013/085570 WO2014110924A1 (en) | 2013-01-18 | 2013-10-21 | Method and system for transmitting uplink demodulation reference signal |
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| DK3372034T3 (en) * | 2015-11-03 | 2020-12-21 | Ericsson Telefon Ab L M | Procedures and devices for planning in uplink |
| CN107040354B (en) * | 2016-02-04 | 2020-10-27 | 中兴通讯股份有限公司 | Configuration method and network element of uplink DMRS (demodulation reference signal), and transmission method and device of uplink DMRS |
| MX2018007853A (en) * | 2016-02-05 | 2018-08-01 | Panasonic Ip Corp America | Terminal and transmission method. |
| CN107769903B (en) * | 2016-08-22 | 2020-01-31 | 上海朗帛通信技术有限公司 | method and device for wireless communication |
| CN107819557B (en) * | 2016-09-13 | 2020-11-27 | 中国移动通信有限公司研究院 | Transmission processing method, network side equipment and mobile communication terminal |
| CN108347320B (en) * | 2017-01-24 | 2022-05-10 | 中兴通讯股份有限公司 | Method and device for processing transmission power state conversion time |
| CN114285714B (en) * | 2017-06-16 | 2024-05-14 | 华为技术有限公司 | Phase tracking reference signal processing method and device |
| US10980067B2 (en) * | 2019-05-02 | 2021-04-13 | Qualcomm Incorporated | Reference signal transmission techniques for random access messages |
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| CN101365232A (en) * | 2007-08-10 | 2009-02-11 | 中兴通讯股份有限公司 | Demodulation reference signal mode notifying method in long-term evolution system |
| CN102404854A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs) |
| CN102413572A (en) * | 2011-09-28 | 2012-04-11 | 中兴通讯股份有限公司 | DMRS (demodulation reference signal) as well as sending method and device thereof |
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| CN102396165B (en) * | 2009-04-15 | 2014-12-17 | Lg电子株式会社 | Method and apparatus for transmitting reference signal |
| CN101989970A (en) * | 2009-08-07 | 2011-03-23 | 中国移动通信集团公司 | Method and equipment for sending demodulation pilot frequency signal |
| KR101699493B1 (en) * | 2010-05-03 | 2017-01-26 | 주식회사 팬택 | Method and Apparatus for Transmitting and Receiving of Cyclic Shift Parameter for Supporting Orthogonality in Multiple Input Multiple Output |
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| CN101365232A (en) * | 2007-08-10 | 2009-02-11 | 中兴通讯股份有限公司 | Demodulation reference signal mode notifying method in long-term evolution system |
| CN102413572A (en) * | 2011-09-28 | 2012-04-11 | 中兴通讯股份有限公司 | DMRS (demodulation reference signal) as well as sending method and device thereof |
| CN102404854A (en) * | 2011-11-04 | 2012-04-04 | 中兴通讯股份有限公司 | Resource allocation method and resource allocation system for uplink demodulation reference signals (DMRSs) |
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