CN105519226B - The method and apparatus of switching time is reserved in device-to-device (D2D) communication - Google Patents
The method and apparatus of switching time is reserved in device-to-device (D2D) communication Download PDFInfo
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- CN105519226B CN105519226B CN201380079434.9A CN201380079434A CN105519226B CN 105519226 B CN105519226 B CN 105519226B CN 201380079434 A CN201380079434 A CN 201380079434A CN 105519226 B CN105519226 B CN 105519226B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/23—Manipulation of direct-mode connections
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Abstract
Embodiments of the present invention provide a kind of method for D2D communication reservation switching time, this method carries out Discrete Fourier Transform (DFT) precoding to the constellation symbol of user data, symbolic vector after the precoding is mapped on the equally spaced subcarrier in part, and keeps other assigned subcarriers on the shelf；The symbolic vector after mapping is transformed into time domain by inverse discrete fourier transformed (IDFT), so that duplicate structure is presented in the time domain symbol vectors generated；And the duplicate symbol sampling of at least partly redundancy is removed from the time domain symbol vectors with repetitive structure, to obtain partial symbols structure, wherein by least partly switching time is reserved for by the free time that symbol removes acquisition.The invention also includes can be disposed to complete the device of the method.
Description
Technical field
Exemplary and non-limiting embodiment of the invention is general to be related to wirelessly communicating, and is related more specifically in equipment
The method and apparatus of switching time is reserved into equipment (D2D) communication.
Background technique
By the driving of consumer demand, modem communications era has resulted in the huge expansion of radio network technique.This nothing
The expansion of line and mobile network's technology meets corresponding consumer demand, while providing greater flexibility for information transmitting
And instantaneity, and convenience is provided for user.
The network technology of current and future continues to press on the simplicity of information transmitting and the convenience of user.It is easier in order to provide
Efficiently information transmitting and convenience, the existing network of telecommunications industry ISP's face improve.Network and communication skill
One development field just carried out of art is the deployment of device-to-device (D2D) communication technology, such as third generation affiliate
Mesh (3GPP) currently carries out the relevant standardization effort of D2D.
The radio resource of main cellular system can be used in communication between devices technology, but allows two computational devices, all
Such as mobile terminal (also referred to as user equipment (UE)), it is in direct communication with each other without making their communication via the group of cellular network
Part.This can bring many benefits.Such as the direct communication link between the mobile terminal of progress D2D communication is compared with via cellular system
The indirect communication of component can reduce the delay time end to end of inter-terminal data exchange.Further, since communication can be by
It is transferred to communication between devices link from cellular network, network load can reduce.Other benefits of D2D communication include improved confinement
Spreadability improves the validity of service network resource, and saves the transimission power of user equipment and network access point.Further
Ground, D2D communication can support multiple terminal user service, such as end-to-end application, the game application of Human To Human, collaboration applications with
And the similar application that can be used by the close mobile terminal user of mutual distance.
In order to make D2D communication mode and communication equipment have competitiveness, performance and cost are needed in D2D Communication System Design
The big factor of to be considered two.In terms of cost, the design of D2D system will reuse as much as possible existing wireless communication system technologies from
And reduce additional design and implementation cost.Aspect of performance, such as since the radio money of main cellular system can be used in D2D
Source, therefore will have to the overall performance for considering D2D and the influence to main cellular system.Interference be influence performance it is main because
One of element.In the wireless communication system for supporting D2D, such as in LTE wireless communication system, interference be may come from lower section
Face: D2D communication uses same resource with cellular communication, different so as to cause the interference between D2D equipment and cellular communication apparatus
D2D equipment therefore lead to the interference of D2D equipment room using same resource, and due in D2D communication possible timing ask
Topic cause to send and receive the conflict of time so as to cause D2D equipment in interference etc..It should pay attention to leading to the third interference
Factor also result in first two interference, for example, base station may be controlled to D2D and phone user distributes orthogonal time-frequency money
Source, but since there are different timings by D2D equipment and phone user, then still may cause resource contention and asked so as to cause interference
Topic.
In order to solve to send and receive collision problem, in the 74th Ran1 meeting of 3GPP, be intended to from transmission state to
Reserved protection interval when reception state switching and from reception state to the state of transmission, and it is further assumed that the protection interval
Length is 624Ts, and wherein Ts=1/30.72e6 is the sampling time for the LTE system that bandwidth is 20MHz (referring to Draft_
Minutes_report_RAN1#74_v010, the document can be from http://www.3gpp.org/ftp/tsg_ran/WG1_
RL1/TSGR1_74/Report/ is obtained).It is still needed at present on how to effectively realize this switching time in LTE frame structure
Further research, and 3GPP not yet standardizes this.One kind is mentioned in a motion of 3GPP Ran1#74 meeting
Simple direct solution, the program are sending or receiving end to punctures data symbols, such as in transmitting terminal by the of beacon
The start-up portion punching of one symbol and/or by the tail portion punching of its last symbol (referring to R1-132912,
Beacon channel design for D2D, RAN1-74, the document can be from http://www.3gpp.org/ftp/
Tsg_ran/WG1_RL1/TSGR1_74/Docs/ is obtained).The defect of this method is that stiff punch operation will lead to having
With the interference of data carrier, between the different sub-band used including the self-interference to same user data intercarrier and different user
Mutually interference.This is because punch operation destroys the orthogonality of multi-carrier signal.
Summary of the invention
In view of this, the first purpose of embodiments of the present invention is to propose a kind of switching time building method, the party
Method realizes the reserved of switching time with the cost of extremely low spectrum efficiency and implementation complexity.
According to an aspect of the present invention, it provides a kind of for reserving switching time in device-to-device (D2D) communication
Method, comprising:
Discrete Fourier Transform (DFT) precoding is carried out to the constellation symbol of user data, to obtain the symbol of precoding
Vector；
The symbolic vector of the precoding is mapped on the equally spaced subcarrier in part, and makes other assigned sons
Carrier wave is on the shelf；
The symbolic vector after mapping is transformed into time domain by inverse discrete fourier transformed (IDFT), so that generate
Duplicate structure is presented in time domain symbol vectors；And
The duplicate symbol sampling of at least partly redundancy is removed from the time domain symbol vectors with repetitive structure, with
Partial symbols structure is obtained, wherein being reserved for switching time for the free time for removing acquisition is at least partly sampled by symbol.
In one embodiment of this invention, the length of the symbolic vector of the precoding is the one of the sub-carrier number of distribution
Half；And wherein the symbolic vector of the precoding is only mapped to even subcarriers.
According to still another embodiment of the invention, using the cyclic prefix of length extension in the partial symbols structure
(CP), and length extension is obtained using the sampling of at least partly redundancy replicator.
According to another aspect of the present invention, it provides a kind of for executing transmission/reception in device-to-device (D2D) communication
The method of state switching, comprising:
Determine whether to switch send/receive status in a data frame；
Switching character position is determined in the data frame that determination to be switched；
The transmission/reception section symbolic construction in determining switching symbol, and cut using what is reserved in partial symbols structure
Change the time complete send/receive status switching, wherein the partial symbols structure be according to the abovementioned embodiments of the present invention it
What the method in one generated.
According to one embodiment of present invention, it is determined whether switching send/receive status in a data frame includes: when described
When the send/receive status difference of data frame and last data frame or latter data frame, determines and need to switch over.
In another embodiment of the invention, determine that switching character position includes when the data frame and last data frame are sent out
Give/reception state is different and while not switching at last data End of Frame determines that the character position is the data frame
Start symbol.
In another embodiment of the present invention, determine that switching character position includes when the data frame and latter data frame are sent out
Give/reception state is different and determines that the character position is the end of the data frame when latter data frame beginning is without switching
Tail symbol.
In some embodiments of the invention, determine that switching character position can also include when the data frame and front and back number
According to frame send/receive status difference and when front and back data frame is without switching, determine that the character position is the data frame
End symbol and start symbol.
According to another aspect of the invention, it provides a kind of for reserving switching time in device-to-device (D2D) communication
Equipment, comprising:
Precoding unit is configured for prelisting to constellation symbol progress Discrete Fourier Transform (DFT) of user data
Code, to obtain the symbolic vector of precoding；
Map unit is configured for for the symbolic vector of the precoding being mapped on the equally spaced subcarrier in part,
And keep other assigned subcarriers on the shelf；
Converter unit is configured to inverse discrete fourier transformed (IDFT) and transforms to the symbolic vector after mapping
Time domain, so that duplicate structure is presented in the time domain symbol vectors generated；And
Unit is removed, is configured for removing at least partly redundancy from the time domain symbol vectors with repetitive structure
Duplicate symbol sampling, to obtain partial symbols structure, wherein by least partly the free time for removing and obtaining is sampled by symbol
It is reserved for switching time.
According to some embodiments of the present invention, the length of the symbolic vector of precoding described in precoding unit is distribution
The half of sub-carrier number；And wherein the symbolic vector of the precoding is only mapped to even subcarriers.
According to another embodiment of the present invention, removing unit can be further configured for being the partial symbols structure
The cyclic prefix (CP) of length extension is generated, and length extension is obtained using the sampling of at least partly redundancy replicator
's.
In accordance with a further aspect of the present invention, it provides a kind of for executing transmission/reception in device-to-device (D2D) communication
The equipment of state switching, comprising:
First determination unit is configured for determining whether to switch send/receive status in a data frame；
Second determination unit is configured for determining switching character position in the data frame that determination to be switched；
Processing unit is configured for the transmission/reception section symbolic construction in determining switching symbol, and utilizes part
The switching time reserved in symbolic construction completes the switching of send/receive status, wherein the partial symbols structure is according to this
The method of generating portion symbolic construction generates in the previous embodiment of invention.
In further embodiment of the present invention, first determination unit is further configured for when the data frame
When with the send/receive status difference of last data frame or latter data frame, determines and need to switch over.
In still another embodiment of the process, second determination unit is further configured for when the data frame is with before
One data frame send/receive status is different and determines the character position for institute when not switching at last data End of Frame
State the beginning symbol of data frame.
According to another embodiment of the present invention, second determination unit be further configured for when the data frame with
Latter data frame send/receive status is different and determines the character position for institute when latter data frame beginning is without switching
State the end symbol of data frame.
In additional embodiment of the present invention, second determination unit can be further configured for when the data frame
From front and back data frame send/receive status it is different and front and back data frame without switch when determine that the character position is described
The end symbol and beginning symbol of data frame.
Detailed description of the invention
The embodiment of the present invention is briefly described, the present invention will be done further in detail with reference to the accompanying drawings now
Explanation.In attached drawing:
Fig. 1 shows the example for a communication system for being used to realize that equipment communicates equipment according to some exemplary embodiments
Son；
Fig. 2 is embodiment according to the present invention for reserving the side of switching time in device-to-device (D2D) communication
The schematic flow chart of method；
Fig. 3 (a) is ordinary symbol schematic diagram；
Fig. 3 (b) is that have obtained in generating portion symbolic construction process to repeat to tie according to one embodiment of present invention
The schematic diagram of the time domain symbol vectors of structure；
- Fig. 3 (c-d) shows the schematic diagram of partial symbols structure according to an embodiment of the present invention；
Fig. 4 be it is according to an embodiment of the present invention for device-to-device (D2D) communication in execute send/receive status cut
The schematic flow chart for the method changed；
Fig. 5 is to show the position view of switching symbol in a data frame according to some embodiments of the present invention；
It is used in device-to-device (D2D) communication reserve shown in Fig. 6 some exemplary embodiments according to the present invention
The schematic block diagram of the equipment of switching time；
It is used in device-to-device (D2D) communication execute shown in Fig. 7 some exemplary embodiments according to the present invention
The schematic block diagram of the equipment of send/receive status switching；
Fig. 8 is the block diagram of a user equipment；And
Fig. 9 is the schematic diagram for showing the system performance of embodiment according to the present invention acquisition.
Specific embodiment
The embodiment of the present invention is described further with reference to the accompanying drawing.
Fig. 1, which is shown, to be used to realize the example communication system that equipment communicates equipment according to some exemplary embodiments
100 block diagram.It will be understood that the diagram in system 100 and other attached drawings provides the example of one embodiment respectively, it should not
It is construed as reducing the scope and essence of the disclosure in any way.In this respect, it is set although Fig. 1 shows one for realizing
The example of the standby communication system configuration to equipment communication, many other configurations can also be used to realize the embodiment of the present invention.
According to an embodiment of the invention, as shown in Figure 1, system 100 may include the nothing that can be provided to network 106
The access point 102 of line access.As an example, access point 102 may include a base station, Base Transceiver Station, node B, evolution
Node B (eNB), and/or similar composition.Network 106 may include one or more wireless networks, one or more wired networks
Network or their certain combination, may include at least part of internet in some embodiments.In some exemplary realities
It applies in example, the usable one or more mobile access mechanisms of network 106, such as long term evolution (LTE), LTE- advanced (LTE-A),
TD SDMA (TD-SCDMA), wideband code division multiple access (W-CDMA), CDMA2000, global system for mobile communications
(GSM), General Packet Radio Service (GPRS) and/or similar system.Although accordingly, it is to be understood that certain realities of the invention
It applies example to describe in terms of LTE and/or lte-a system, but this is illustrative, and not restrictive.
In some exemplary embodiments, wireless access point 102 can be configured to provide warp for user equipment (UE) 104
By link 108 to the wireless access of network 106.UE 104 may include any mobile communication equipment, such as, mobile phone, and just
It takes formula digital assistants (PDA), smart phone, pager, laptop, portable type game device or any other numerous hand
Formula or portable communication device are held, equipment, content generation device, Content Consuming device or their combination etc. are calculated.Wirelessly connect
The foundation that access point 102 can be configured to support the D2D between two or more UE 104 to communicate.In this side
Face, wireless access point 102 can be configured to for D2D communicate and D2D discovery distribution resource, coordinate D2D link establishment and/or
Execute other similar function.
In exemplary system shown in fig. 1, two that D2D communication each other can be participated in by D2D link 110 are shown
UE 104.It will be understood, however, that two UE 104 are in an illustrative manner rather than shown in the mode of limitation.In this respect, may be used
To understand that more than two UE 104 can participate in D2D communication by one or more D2D links 110.
Due to D2D communication propagation delay it is different from the propagation delay of equipment to access point, in some cases access point without
Method accurately controls transmission/reception timing of D2D equipment, and thus there may be the conflicts sent and received, and cause interference with therewith
Generation.In order to avoid this problem proposes that a kind of switch for transmission/received state mentions according to one embodiment of present invention
Method for reserving switching time.
Fig. 2 is embodiment according to the present invention for reserving the side of switching time in device-to-device (D2D) communication
The schematic flow chart of method.
As shown in Fig. 2, Discrete Fourier Transform (DFT) precoding is carried out in constellation symbol of the step 201 to user data,
To obtain the symbolic vector of precoding, wherein the length of the precoding is less than the number of assigned subcarrier.
In step 202, the symbolic vector of the precoding is only mapped on the equally spaced subcarrier in part, and makes other quilts
The subcarrier of distribution is on the shelf, that is, transmits zero.Thus the symbolic vector after being mapped, length are equal to the son being assigned and carry
The number of wave, wherein the corresponding symbol sampling of subcarrier on the shelf is by zero padding.
In step 203, the symbolic vector after mapping is transformed to by time domain by inverse discrete fourier transformed (IDFT), so that
Duplicate structure is presented in the time domain symbol vectors that must be generated.
Later in step 204, at least partly redundancy repetition is removed from the time domain symbol vectors with repetitive structure
Symbol sampling, to obtain partial symbols structure, wherein by least partly by symbol sample remove obtain free time reserve
Make switching time.
According to some embodiments of the present invention, the DFT length used in step 201 can be assigned subcarrier length
Half, and in this case the symbolic vector of the precoding is only mapped to even subcarriers in step 202.
According to another embodiment of the present invention, the step 204 of this method can also include for partial symbols structure life
At the cyclic prefix (CP) that length extends, and length extension is obtained using one or more redundancy replicator samplings
's.
Fig. 3 shows the schematic diagram of partial symbols structure according to some exemplary embodiments.Wherein Fig. 3 (a) is used as referring to
Ordinary symbol structural schematic diagram comprising CP part and data portion, the sign pattern is referred to as symbol A below.Fig. 3
It (b) is according to one embodiment of present invention obtained in generating portion symbolic construction process with the time-domain symbol of repetitive structure
The schematic diagram of vector.Fig. 3 (c-d) shows the schematic diagram of partial symbols structure according to an embodiment of the present invention.Fig. 3 (c-d) is
By being further processed acquisition to the symbolic vector in Fig. 3 (b) with repetitive structure.
According to one embodiment of present invention, the symbolic vector shown in Fig. 3 (b) with repetitive structure can be moved
Position, so that reserving switching time at its ending between the starting position of following symbol to get the part as shown in Fig. 3 (c) is arrived
Symbolic construction, the partial symbols structure is referred to as symbol C below.In symbol C, switching time is located at the end of symbol, Fig. 3
(c) dash area of left end indicates removed replicator sampling in, and the replicator sampling not removed may be used as length
The CP of extension.
It according to another embodiment of the present invention, can be by the end of the symbolic vector shown in Fig. 3 (b) with repetitive structure
Tail is aligned with the starting position of following symbol, and reserves switching time in its starting position to get to as shown in Fig. 3 (d)
Divide symbolic construction, the partial symbols structure is referred to as symbol D below.In symbol D, switching time is located at the start bit of symbol
It sets, the replicator that wherein dash area represents the length requirement for meeting switching time and removes samples.Equally, in Fig. 3
(d) replicator not removed can also be sampled to the CP for being used as length extension in example.
It should be noted that while the CP for using length extension in the example of Fig. 3 in other embodiments can also be in part
Normal length CP is used in symbolic construction.
Another embodiment of the present invention, which provides, a kind of switches over send/receive status using the partial symbols structure
Method.Fig. 4 shows according to an embodiment of the present invention for executing send/receive status in device-to-device (D2D) communication
The schematic flow chart of the method for switching.
As shown in figure 4, D2D equipment 104 determines whether that send/receive status will be switched in data frame in step 401；This is really
It surely can be for example, based on pre-defined, based on the instruction of access point 102, or based on the result coordinated with another equipment 104.
When determining that send/receive status will switch in data frame i, then determine reserved switching time in the number in step 402
According to the character position in frame, that is, switch the position of symbol.The position can be, such as pre-defines or indicated by access point 102
, or it is determining based on the coordination of equipment room.
Later in step 403, in the switching symbol of the determination, a kind of specific symbolic construction, i.e. root are sent or received
According to one embodiment of the invention method generate partial symbols structure, and in the switching symbol reserve switching time into
The switching of row send/receive status.
Further embodiment according to the present invention, send/receive status will be switched by, which wherein determining whether in step 401, includes
When the send/receive status difference of the data frame and last data frame or latter data frame, determines and need to switch over.
Further embodiment according to the present invention, wherein when the data frame and last data frame send/connect in step 402
The switching symbol that receipts state is different and determines when not switching at last data End of Frame can be the data frame
Start symbol.
Another embodiment according to the present invention, wherein in step 402 when the data frame and latter data frame send/receive shape
The end that different and determining when latter data frame beginning is without the switching switching symbol of state can be the data frame accords with
Number.
Another embodiment according to the present invention, wherein in step 402 when the data frame and front and back data frame send/receive shape
State it is different and front and back data frame without the switching symbol that is determined when switching can be the end symbol of the data frame with
Start symbol.
Fig. 5 according to some embodiments of the present invention, shows the position view of switching symbol in a data frame.Fig. 5's
In example, it is assumed that the data frame is a transmission/transmission subframe.As shown in figure 5, in some embodiments, the partial symbols
Structure can be the end symbol positioned at the subframe, and in this case, which has such as symbol C in Fig. 3
Structure.In further embodiments, which can be the beginning symbol positioned at the subframe, in this case,
The partial symbols structure has the structure such as symbol D in Fig. 3.In another embodiment, which can be located at again
The beginning symbol and end symbol of the subframe, in this case, structure of the beginning symbol with symbol D in such as Fig. 3, and end
Symbol has the structure such as symbol C in Fig. 3.
It is described in detail so that the beginning of data frame and end symbol are the embodiment for switching symbol as an example in LTE D2D below
How part symbolic construction and switching time are obtained under background.It should be understood that the LTE background is a kind of wireless communication
Example, the embodiment of the present invention can be applied in other similar system.
Assume that (in LTE, a resource block includes N to user data in 1 resource block size in this embodimentsc=12
A subcarrier) D2D find channel, and assume that in switching symbol with length be NscHalf DFT precoding, then exist
The user data constellation symbol number that can be loaded in data frame are as follows:
Ncsym=(Ndsym-1)*Nsc
Wherein NcsymIndicate the user data constellation symbol number that can be loaded in a data frame, NscIndicate sub-carrier number, and
NdsymIndicate the symbolic number in data frame.
As an example, user data constellation symbol is expressed as d0, d1, d2..., dNcsym-1.Then, by the symbol sebolic addressing
It is divided into several symbolic vectors to obtain in the DFT precoding that can then use using LTE uplink to reduce average specific (PAPR)
Obtain higher efficiency of amplitude and potential lower out-of-band radiation.Constellation symbol is converted into multiple symbolic vectors as a result,
It respectively corresponds as a SC-FDMA symbol.It should be noted that for beginning and end SC-FDMA in the implementation of the invention
The symbolic vector of symbol has length Nsc/ 2 obtain, other corresponding symbolic vectors of SC-FDMA symbol include NscA symbol member
Element.Each symbolic vector can be expressed as follows:
Wherein diIndicate i-th of user data constellation symbol.Later, DFT precoding is carried out respectively to above-mentioned symbolic vector,
Vector after acquisition-DFT precoding
It should be noted thatIt is by half long DFT (Nsc/ 2 point DFT) precoding obtains, and other vectors pass through
Overall length DFT (NscPoint DFT) precoding acquisition.Length is N laterscThe vector of/2-Symbol be placed in even number
Carrier wave, and the zero setting on other subcarriers, thus willLength be extended to Nsc, i.e., identical as other vector lengths.
Then these vectors are mapped on the subcarrier of distribution, such as in this embodiment, are mapped to for finding
On the subcarrier of channel.The subcarrier can be that UE is automatically obtained or access point scheduled.Next such as tradition
As operation in SC-FDMA, is operated by IDFT and the vector is switched to time domain.
It is worth noting that, to the SC-FDMA symbol of beginning and end, because its data particularly maps on sub-carriers
(being only mapped to even subcarriers), the vector show duplicate structure in time domain, as shown in Figure 3.This characteristic allows to pass through
It removes certain duplicate redundancy samplings and obtains reserved switching time.
According to another embodiment of the present invention, replicator sampling in part can be utilized to extension CP.Due to usual feelings
Switching time is reserved under condition will not occupy all replicators, therefore a part can be used for CP for certain potential purpose,
Such as non-cutting time and/or Frequency Synchronization.
Another embodiment of the present invention is the equipment for reserving switching time in device-to-device (D2D) communication.Fig. 6
The schematic block diagram of equipment 600 for reserving switching time in device-to-device (D2D) communication is shown.
As shown in fig. 6, the equipment 600 includes precoding unit 601, be configured for the constellation symbol of user data into
Row Discrete Fourier Transform (DFT) precoding, to obtain the symbolic vector of precoding；Map unit 602 is configured for institute
The symbolic vector for stating precoding is mapped on the equally spaced subcarrier in part, and keeps other assigned subcarriers on the shelf；
Converter unit 603 is configured to inverse discrete fourier transformed (IDFT) for the symbolic vector after mapping and transforms to time domain,
So that duplicate structure is presented in the time domain symbol vectors generated；And unit 604 is removed, it is configured for tying from repetition
The duplicate symbol sampling of at least partly redundancy is removed in the time domain symbol vectors of structure, to obtain partial symbols structure, wherein
Switching time at least partly will be reserved for by the free time that symbol removes acquisition.
According to some embodiments, wherein the length of the symbolic vector of precoding obtained in precoding unit 601 is distribution
Sub-carrier number half；And wherein the symbolic vector of the precoding is only mapped to even subcarriers.
According to another embodiment, the generation length expansion in partial symbols structure can be further configured by removing unit 604
The cyclic prefix (CP) of exhibition, and length extension is obtained using the sampling of at least partly redundancy replicator.
Another embodiment of the present invention provides a kind of for executing transmission/reception shape in device-to-device (D2D) communication
The equipment of state switching.Fig. 7 shows the equipment 700 for executing send/receive status switching in device-to-device (D2D) communication
Schematic block diagram.
As shown in fig. 7, the equipment 700 includes the first determination unit 701, it is configured for determining whether cutting in a data frame
Change send/receive status；Second determination unit 702 is configured for determining switching symbol in the data frame that determination to be switched
Position；And processing unit 703, it is configured for the transmission/reception section symbolic construction in determining switching symbol, and utilize
The switching time reserved in partial symbols structure completes the switching of send/receive status.
According to some embodiments of the present invention, wherein first determination unit 701 can be further configured for working as
When the send/receive status difference of the data frame and last data frame or latter data frame, determines and need to switch over.
According to another embodiment of the present invention, wherein second determination unit 702 can be further configured for working as
The data frame is different from last data frame send/receive status and determines when not switching at last data End of Frame
The character position is the beginning symbol of the data frame.
According to still another embodiment of the invention, wherein second determination unit 702 is further configured for when described
Data frame is different from latter data frame send/receive status and determines the symbol when latter data frame beginning is without switching
Position is the end symbol of the data frame.
In additional embodiment of the invention, second determination unit 702 can be further configured for when the number
It is different according to frame and front and back data frame send/receive status and determine that the character position is when front and back data frame is without switching
The end symbol and beginning symbol of the data frame.
According to some embodiments of the present invention, above-mentioned apparatus can be the device for including or applying on user equipment 104.
Fig. 8 shows a kind of device exemplary block diagram that may include or apply on a UE104, which can be configured to
Execute such as function/method and step herein described in the embodiment.It is to be noted, however, that being directed to shown in Fig. 8 or below
The component of Fig. 8 description, equipment or element may not be enforceable, therefore some can be omitted in certain embodiments.In addition,
Some embodiments, which may include, to be shown than Fig. 8 and for more or different components that Fig. 8 is described, equipment or element.
Referring now to Fig. 8, UE 104 may include that can be configured to carry out behaviour according to exemplary embodiment disclosed herein
The processing system 810 of work, or be otherwise in communication with.According to one or more exemplary embodiments, processing system 810
Data processing, the execution of application and/or other processing and management service can be configured to carry out.In some embodiments, UE
104 or its part or component, such as processing system 810, it may be implemented as or comprising a chip or chipset.Therefore,
In some cases, UE 104 or processing system 810 can be configured as realizes an implementation of the invention on a single chip
Example or as one individual " system on chip ".Therefore, in some cases, a chip or chipset can be formed for holding
The one or more operations of row are to provide the device of function described herein.
In some exemplary embodiments, processing circuit 810 may include a processor 812, and in some implementations
In example, memory 814 may further include.Processing system 810 can be communicated with a user interface 816 and/or one and be connect
Mouth 818 communicates, or otherwise controls them.Therefore, processing system 810 may be implemented as one be configured (for example,
By hardware, the combination of software or hardware and software) execute the circuit chip of operation described herein (for example, one block of integrated electricity
Road chip).
User interface 816 (if realizing) can communicate to receive one in user interface 816 with processing system 810
The instruction of a user input, and/or provide a user it is some form of such as audible, it is visual, it is mechanical or other
Output.
Communication interface 818 may include one or more and make it possible to connect with what other equipment and/or network were communicated
Mouth mechanism.In some cases, the communication interface 818 can be any device, such as included in being configurable for from net
Network receives data or an equipment or circuit and/or any in the hardware from data to network or combination of hardware that send
Other equipment or module communicated with processing system 810.As an example, communication interface 818 can be supported and another UE
104 D2D communication, such as passes through a D2D link 110.
In some exemplary embodiments, memory 814 may include one or more non-transitory memory devices such as,
For example, it may be fixed or moveable volatibility and or nonvolatile memory.The memory 814 can be configured
To store information, data, application program, it is each that instruction etc. enables UE 104 to be completed according to one or more exemplary embodiments
Kind function/method and step.For example, memory 814 can be configured as the input data that caching is used to be handled by processor 812.
Additionally or as selection, memory 814 can be configured as the instruction that storage is used to be executed by processor 812.As another
Alternative solution, memory 814, which may include one or more, can store various files, inside the perhaps database of data set.
Processor 812 can be implemented with many different modes.For example, processor 812 may be embodied as various processing dresses
It sets, such as one or more microprocessors or other processing elements, a coprocessor, a controller or including as such as one
A ASIC (application-specific IC), FPGA (field programmable gate array), or the like as integrated circuit
Various other calculating or processing equipment.In some exemplary embodiments, processor 812, which can be configured to carry out, is stored in
On reservoir 814 or processor 812 is otherwise accessible instruction.Therefore, either by the group of hardware or hardware and software
Close configuration, configured accordingly the processor 812 can represent be capable of embodiment according to the present invention execute operation one
Entity (for example, physical implementation on circuit-in the form of processing system 810).Thus, for example, when processor 812 is implemented as
ASIC, FPGA or the like, the processor 812 can be by specific configuration the hardware for executing operation described herein.Alternatively,
As another example, when processor 812 is implemented as the executor of software instruction, which can be with specific configuration processor
812 operate to execute one or more described herein
In some exemplary embodiments, processor 812 (or processing system 810) may be implemented as include, or with it
He controls mode, a D2D manager 820.Similarly, D2D manager 820 may be implemented as various devices, such as circuit,
Hardware, one kind comprising be stored on computer-readable medium (for example, memory 814) by processing equipment (for example, processor
812) computer program product of the computer-readable program instructions executed or their certain combination.The D2D manager
820 can communicate with one or more memories 814 or communication interface 818 to access, and receive and/or send data.
According to some embodiments, determine whether that carrying out send/receive status switching can be based in the operation of described device
It is pre-defined, such as value/decision rule in stored in memory 814, or it is based on passing through communication interface 818 from access
The instruction that point 102 obtains, or based on the coordination result obtained by communication interface 818 from another equipment 104.
In some embodiments, the determination send/receive status in the operation of described device will switch, and determine reserved cut
The operation for changing the character position where the time includes the position for obtaining switching symbol in the following manner: for example based on being stored in
Pre-defined in reservoir 814 or based on the instruction obtained by communication interface 818 from access point 102, or be based upon
The coordination for the equipment room that communication interface 818 carries out.
Fig. 9 shows the computer artificial result of the D2D communication performance obtained according to one embodiment of present invention, and emulation is adopted
Parameter is as shown in table 1.In Fig. 9, which shows that the partial symbols structure proposed by the present invention that is based on is reserved
The method of switching time has the gain of about 0.3~0.4dB compared with the method directly punched in the prior art, and result takes
The available SC-FDMA symbolic number certainly in each discovery subframe.
Table 1: simulation parameter
Have benefited from the enlightenment in the description and relevant drawings of front, the technical staff in field related to the present invention can
To expect many modifications and other embodiments of invention as described herein.Accordingly, it is to be understood that the present invention is not limited to institute's public affairs
The specific embodiment opened, and modification and other embodiments will be also comprised within the scope of appended claims.
In addition, although the description of front and relevant drawings describe example under the background of certain elements and/or the example combinations of function
Property embodiment, it is to be appreciated that other optional embodiments can provide the combination of different element and/or function, without de-
Range from appended claims.In this respect, for example, it is contemplated that being different from element described above and/or function
Combination can also be set forth in appended some claims.Although there is used herein specific term, they are only
General and descriptive use, and be not for purposes of limitation.
Claims (16)
1. method of the one kind for reserving switching time in device-to-device (D2D) communication, comprising:
Discrete Fourier Transform (DFT) precoding is carried out to the constellation symbol of user data, with obtain the symbol of precoding to
Amount；
The symbolic vector of the precoding is mapped on the equally spaced subcarrier in part, and makes other assigned subcarriers
It is on the shelf；
The symbolic vector after mapping is transformed into time domain by inverse discrete fourier transformed (IDFT), so that the time domain generated
Duplicate structure is presented in symbolic vector；And
The duplicate symbol sampling of at least partly redundancy is removed, from the time domain symbol vectors with repetitive structure to obtain
Partial symbols structure, wherein being reserved for switching time for the free time for removing acquisition is at least partly sampled by symbol.
2. according to the method described in claim 1, wherein the length of the symbolic vector of the precoding is the sub-carrier number of distribution
Half；And wherein the symbolic vector of the precoding is only mapped to even subcarriers.
3. according to the method described in claim 1, wherein using the cyclic prefix of length extension in the partial symbols structure
(CP), and length extension is obtained using the sampling of at least partly redundancy replicator.
4. method of the one kind for executing send/receive status switching in device-to-device (D2D) communication, comprising:
Determine whether to switch send/receive status in a data frame；
Switching character position is determined in the data frame that determination to be switched；
The transmission/reception section symbolic construction in determining switching symbol, and when using the switching reserved in partial symbols structure
Between complete the switching of send/receive status, wherein the partial symbols structure is any claim in -3 according to claim 1
What the method generated.
5. according to the method described in claim 4, where it is determined whether switching send/receive status includes: to work as in a data frame
When the send/receive status difference of the data frame and last data frame or latter data frame, determines and need to switch over.
6. method according to claim 4 or 5, wherein when the data frame and last data frame send/receive status not
When switching over together and not at last data End of Frame, determine that switching character position is the beginning symbol of the data frame.
7. method described in claim 4 or 5, wherein when the data frame and latter data frame send/receive status difference simultaneously
When latter data frame beginning is without switching, determine that switching character position is the end symbol of data frame.
8. method described in claim 4 or 5, wherein when the data frame and front and back data frame send/receive status are different
And when front and back data frame is without switching, the end symbol and start symbol that switching character position is the data frame are determined.
9. equipment of the one kind for reserving switching time in device-to-device (D2D) communication, comprising:
Precoding unit is configured for carrying out Discrete Fourier Transform (DFT) precoding to the constellation symbol of user data, with
Obtain the symbolic vector of precoding；
Map unit is configured for for the symbolic vector of the precoding being mapped on the equally spaced subcarrier in part, and makes
Other assigned subcarriers are on the shelf；
Converter unit, when being configured to inverse discrete fourier transformed (IDFT) and transforming to the symbolic vector after mapping
Domain, so that duplicate structure is presented in the time domain symbol vectors generated；And
Unit is removed, is configured for removing at least partly redundancy repetition from the time domain symbol vectors with repetitive structure
Symbol sampling, to obtain partial symbols structure, wherein by least partly by symbol sample remove obtain free time reserve
Make switching time.
10. equipment according to claim 9, wherein the length of the symbolic vector of the precoding is the sub-carrier number of distribution
Half；And wherein the symbolic vector of the precoding is only mapped to even subcarriers.
11. equipment according to claim 9, wherein using the cyclic prefix of length extension in the partial symbols structure
(CP), and length extension is obtained using the sampling of at least partly redundancy replicator.
12. equipment of the one kind for executing send/receive status switching in device-to-device (D2D) communication, comprising:
First determination unit is configured for determining whether to switch send/receive status in a data frame；
Second determination unit is configured for determining switching character position in the data frame that determination to be switched；
Processing unit is configured for the transmission/reception section symbolic construction in determining switching symbol, and utilizes partial symbols
The switching time reserved in structure completes the switching of send/receive status, wherein the partial symbols structure is wanted according to right
Ask the generation of method described in any claim in 1-3.
13. equipment according to claim 12, wherein first determination unit is further configured for when the frame
When with the send/receive status difference of last data frame or latter data frame, determines and need to switch over.
14. equipment according to claim 12 or 13, wherein second determination unit is further configured for when this
Data frame is different from last data frame send/receive status and when not switched at last data End of Frame determine described in
Switch the beginning symbol that character position is data frame.
15. equipment according to claim 12 or 13, wherein second determination unit is further configured for working as institute
State data frame it is different from latter data frame send/receive status and latter data frame beginning without switching when determine described in
Switch the end symbol that character position is the data frame.
16. equipment according to claim 12 or 13, wherein second determination unit is further configured for working as institute
It is different and determine the switching when front and back data frame is without switching to state data frame and front and back data frame send/receive status
Character position is the end symbol and beginning symbol of the data frame.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2013/084506 WO2015042889A1 (en) | 2013-09-27 | 2013-09-27 | Method and device for reserving switchover time in device to device communication |
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| EP3893532A4 (en) * | 2018-12-20 | 2022-07-06 | Beijing Xiaomi Mobile Software Co., Ltd. | Data transmission method and apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010084411A1 (en) * | 2009-01-23 | 2010-07-29 | Nokia Corporation | Interference suppression during device-to-device communications |
| CN103108389A (en) * | 2011-11-15 | 2013-05-15 | 中兴通讯股份有限公司 | Communication method and communication system from device to device and user devices |
| WO2013067686A1 (en) * | 2011-11-08 | 2013-05-16 | Renesas Mobile Corporation | Method and apparatus for d2d transmission |
-
2013
- 2013-09-27 WO PCT/CN2013/084506 patent/WO2015042889A1/en active Application Filing
- 2013-09-27 CN CN201380079434.9A patent/CN105519226B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010084411A1 (en) * | 2009-01-23 | 2010-07-29 | Nokia Corporation | Interference suppression during device-to-device communications |
| WO2013067686A1 (en) * | 2011-11-08 | 2013-05-16 | Renesas Mobile Corporation | Method and apparatus for d2d transmission |
| CN103108389A (en) * | 2011-11-15 | 2013-05-15 | 中兴通讯股份有限公司 | Communication method and communication system from device to device and user devices |
Non-Patent Citations (1)
| Title |
|---|
| D2D discovery channel design;Alcatel-Lucent Shanghai Bell等;《3GPP TSG RAN WG1 Meeting #76bis,R1-141253》;20140331;第2节 |
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| WO2015042889A1 (en) | 2015-04-02 |
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