CN103987026B - A kind of device-to-device communication data transmission method, system and user equipment - Google Patents
A kind of device-to-device communication data transmission method, system and user equipment Download PDFInfo
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Abstract
The invention discloses a kind of device-to-device (D2D) communication data transmission methods, comprising: user equipment (UE) carries out independent data transmission on two time slots (slot) of D2D subframe (subframe) respectively；The data transmission includes: the transmitting of data and/or the reception of data.The present invention further simultaneously discloses a kind of D2D communication data transfer system and UE, and the present invention can make UE carry out efficient D2D communication data transfer and/or the transmission of cellular communication data, improve resource utilization by effectively dividing the D2D communication resource.
Description
Technical Field
The present invention relates to data transmission technology in the field of mobile communication, and in particular, to a Device-to-Device (D2D) communication data transmission method, system and User Equipment (UE).
Background
Currently, in a cellular communication system, when two UEs need to transmit traffic data, for example: service data transmitted by the UE1 to the UE2 is transmitted to the base station 1 through an air interface, referred to as an air interface for short, and the base station 1 transmits the service data to the base station 2 through a core network; the base station 2 transmits the service data to the UE2 through an air interface, and the transmission of the service data from the UE2 to the UE1 adopts a similar processing flow. When the UE1 and the UE2 are located in the same cell, as shown in fig. 1, although the base station 1 and the base station 2 are the same site, one data transmission still consumes two wireless spectrum resources.
It follows that the above-described cellular communication method is clearly not an optimal communication means if the UE1 and the UE2 are located in the same cell and are close together. However, with the diversification of mobile communication services, for example: social networks, electronic payments, etc. are increasingly used in wireless communication systems, resulting in an increasing demand for traffic transmission between close-range users. Therefore, the D2D communication mode is receiving increasingly wide attention. As shown in fig. 2, the D2D communication means that service data is directly transmitted from the source UE to the target UE over an air interface without being forwarded by the base station. It can be seen that this communication mode has distinct characteristics compared to the conventional communication mode of a cellular communication system. For users of short-range communication, D2D transmission not only saves wireless spectrum resources, but also reduces data transmission pressure of the core network.
In the conventional cellular communication system, the subframe structure is shown in fig. 3, each radio frame is 10ms, and includes 10 subframes. Each subframe is 1ms and is divided into 2 slots (slots) of 0.5ms, namely slot #0 and slot # 1. Further, according to the difference of Cyclic Prefixes (CP) adopted by the system, the number of single-Carrier Frequency Division Multiple Access (SC-FDMA) symbols included in each subframe is different, and the subframe is specifically divided into two types: when the system adopts a Normal Cyclic Prefix (Normal CP), each subframe contains 14 SC-FDMA symbols, each slot includes 7 SC-FDMA symbols, which are denoted as symbol #0 to symbol # 13; when the system adopts Extended Cyclic Prefix (Extended CP), each subframe contains 12 SC-FDMA symbols, and each slot includes 6 SC-FDMA symbols, which are denoted as symbol #0 to symbol # 11.
For a UE supporting D2D communication, it is not only performing pure cellular communication or D2D communication, but may be in the state of cellular communication and D2D communication at the same time, that is: the UE maintains cellular communication with the base station while also maintaining a D2D connection with other UEs and performs data transmission. Here, two UEs communicating D2D are referred to as a D2D UE pair (D2D UEpair), and each UE is referred to as a D2D communicating peer UE with respect to the other UE. It can be seen that D2D communication based on cellular communication network is a new technology for directly communicating among a plurality of terminal devices supporting D2D functions under the control of the system, which not only can reduce the occupation of system resources, improve the spectrum efficiency of cellular communication system, and reduce the transmission power consumption of the terminal, but also can save the network operation cost to a great extent.
Therefore, between the two communication modes of cellular communication and D2D communication, how to effectively transmit data by UEs supporting D2D communication is a problem to be solved.
Disclosure of Invention
In view of the above, the present invention provides a D2D communication data transmission method, system and UE, which can make the UE perform efficient D2D communication data transmission and/or cellular communication data transmission by effectively dividing D2D communication resources, thereby improving resource utilization.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a device-to-device D2D communication data transmission method, which comprises the following steps:
the method comprises the steps that User Equipment (UE) respectively carries out independent data transmission on two slot slots of a subframe of D2D; the data transmission comprises: transmission of data and/or reception of data.
The D2D subframe is a subframe configured to the UE by the network side for D2D communication; or subframes for D2D communication obtained by contention for the UE.
Wherein the network side comprises one or more of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.
Wherein the D2D subframe carries D2D communication data; or, carry both D2D communication data and cellular communication data.
In the above scheme, the UE performs independent data transmission on two slots of the D2D subframe, respectively, and the independent data transmission is as follows:
UE transmits a signal on slot #0 and receives a signal on slot # 1; or,
the UE receives a signal on slot #0 and transmits the signal on slot # 1; or,
UE respectively transmits signals to different nodes on slot #0 and slot # 1; or,
the UE receives signals from different nodes on slot #0 and slot #1, respectively.
Wherein the signal carries D2D communication data or cellular communication data.
Wherein the D2D communication data comprises: D2D control data and/or D2D traffic data between the UE and the D2D communication peer UE;
the cellular communication data comprises: cellular communication control data and/or cellular communication traffic data between the UE and the network side.
Wherein the node comprises: D2D communicates to the peer UE and/or network side.
In the above scheme, the UE transmits a signal on slot #0, and the signal is:
when the system employs a Normal cyclic prefix Normal CP, the UE transmits signals on symbol #0 to symbol #6, or symbol #1 to symbol #6, or symbol #0 to symbol #5, or symbol #1 to symbol # 5; when the system employs an extended cyclic prefix extended CP, the UE transmits signals on symbol #0 to symbol #5, or symbol #1 to symbol #5, or symbol #0 to symbol #4, or symbol #1 to symbol # 4.
In the above scheme, the UE transmits a signal on slot #1, and the signal is:
when the system employs Normal CP, the UE transmits signals on symbol #7 to symbol #13, or symbol #8 to symbol #13, or symbol #7 to symbol #12, or symbol #8 to symbol # 12; when the system employs extended CP, the UE transmits signals on symbol #6 to symbol #11, or symbol #7 to symbol #11, or symbol #6 to symbol #10, or symbol #7 to symbol # 10.
In the above scheme, the UE receives a signal on slot #0, and the signal is:
when the system employs Normal CP, the UE receives signals on symbol #0 to symbol #6, or symbol #1 to symbol #6, or symbol #0 to symbol #5, or symbol #1 to symbol # 5; when the system employs extended CP, the UE receives signals on symbol #0 to symbol #5, or symbol #1 to symbol #5, or symbol #0 to symbol #4, or symbol #1 to symbol # 4.
In the above scheme, the UE receives a signal on slot #1, and the signal is:
when the system employs Normal CP, the UE receives signals on symbol #7 to symbol #13, or symbol #8 to symbol #13, or symbol #7 to symbol #12, or symbol #8 to symbol # 12; when the system employs extended CP, the UE receives signals on symbol #6 to symbol #11, or symbol #7 to symbol #11, or symbol #6 to symbol #10, or symbol #7 to symbol # 10.
Further, the method further comprises:
the UE transmits signals on all or part of physical resource blocks PRB of slot #0 or slot #1, wherein all or part of PRB is configured by a network side, or obtained by the UE through competition, or is used PRB when the UE receives signals on slot #1 or slot # 0.
The method further comprises the following steps:
the UE receives signals on all or part of PRBs of the slot #1 or the slot #0, wherein the all or part of PRBs are configured by a network side, or are obtained by competition of the UE, or are used PRBs when the UE transmits the signals on the slot #0 or the slot # 1.
The invention also provides a D2D communication data transmission system, which comprises UE, a data transmission module and a data transmission module, wherein the UE is used for carrying out independent data transmission on two slots of the D2D subframe respectively; the data transmission comprises: transmission of data and/or reception of data.
Further, the UE is specifically configured to transmit a signal on slot #0 and receive a signal on slot # 1; or, receiving a signal on slot #0 and transmitting a signal on slot # 1; or transmitting signals to different nodes on slot #0 and slot #1 respectively; or, receiving signals from different nodes on slot #0 and slot #1, respectively;
wherein the signal carries D2D communication data or cellular communication data.
The UE further comprises: the data transmitting module and the data receiving module; wherein,
the data transmitting module is used for transmitting signals on slot # 0; alternatively, the signal is transmitted on slot # 1; or transmitting signals to different nodes on slot #0 and slot #1 respectively;
the data receiving module is used for receiving signals on slot # 1; or, receiving a signal on slot # 0; alternatively, signals from different nodes are received on slot #0 and slot #1, respectively.
The data transmitting module is further configured to transmit a signal on all or part of physical resource blocks PRB of slot #0 or slot #1, where the all or part of PRB is configured by a network side, obtained by a UE through contention, or is a PRB used by the UE when the UE receives the signal on slot #1 or slot # 0.
The data receiving module is further configured to receive a signal on all or part of PRBs of slot #1 or slot #0, where the all or part of PRBs are configured by a network side, obtained by contention of a UE, or used by the UE when transmitting the signal on slot #0 or slot # 1.
Further, the system further comprises: the D2D communication peer UE and the network side are respectively used for data transmission with the UE.
The invention also provides a UE as claimed in any one of claims 15 to 19.
According to the D2D communication data transmission method, the system and the UE, the UE respectively carries out independent data transmission on two slots of a D2D subframe; wherein the data transmission comprises: transmission of data and/or reception of data. By effectively dividing D2D communication resources, the invention not only can realize the transmission of D2D communication data, but also can respectively transmit D2D communication data and cellular communication data on two slots of a D2D subframe when the UE is in a state of cellular communication and D2D communication at the same time, thereby saving the network operation cost to a great extent. Therefore, the method and the device can enable the UE to carry out efficient D2D communication data transmission and/or cellular communication data transmission, and improve the resource utilization rate.
Drawings
Fig. 1 is a diagram illustrating a data transmission scheme of a conventional cellular communication system;
fig. 2 is a schematic diagram of a D2D communication data transmission mode;
fig. 3 is a diagram of a frame structure of a conventional cellular communication system;
fig. 4 is a schematic diagram of resource partitioning between cellular communication and D2D communication in the embodiment of the present invention;
fig. 5 is a diagram illustrating a transmission/reception status of a UE on a D2D subframe according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an effective symbol transmitted on slot #0 by a UE according to an embodiment of the present invention;
FIG. 7 is a diagram of effective symbols transmitted by a UE on slot #1 according to an embodiment of the present invention;
fig. 8 is a schematic diagram of effective symbols received by a UE on slot #0 in the embodiment of the present invention;
fig. 9 is a schematic diagram of effective symbols received by a UE on slot #1 in the embodiment of the present invention;
fig. 10 is a schematic diagram of resource division of a UE on a D2D dedicated frequency band according to a first embodiment of the present invention;
fig. 11 is a schematic diagram of resource division of D2D obtained by contention by the UE according to the second embodiment of the present invention;
fig. 12 is a schematic diagram of D2D resource partitioning in the third embodiment of the present invention;
fig. 13 is a schematic diagram of D2D resource partitioning according to a fourth embodiment of the present invention;
fig. 14 is a schematic diagram of D2D resource partitioning according to a fifth embodiment of the present invention;
fig. 15 is a schematic diagram of D2D resource partitioning according to a sixth embodiment of the present invention;
fig. 16 is a schematic diagram of D2D resource partitioning in the seventh embodiment of the present invention.
Detailed Description
The basic idea of the invention is: the UE respectively carries out independent data transmission on two slots (slots) of a D2D subframe (subframe); the data transmission comprises: transmission of data and/or reception of data.
In the invention, the UE is the UE supporting the D2D communication mode; the data includes: control data and/or traffic data, the control data including configuration information, scheduling information, HARQ feedback, measurement reports, resource requests, and the like.
The present invention is described below with reference to the accompanying drawings and specific embodiments, taking a base station as an example of a configuration control entity on a network side.
In D2D communication, two or more UEs perform data transmission under the control of a base station, the data transmission operation including: data receiving/transmitting operation between the UE and the base station, data receiving/transmitting operation of the opposite end UE1/UE2/UE3 … in communication with D2D, and the like. For simplicity of description, the following example is illustrated with a D2DPair consisting of two UEs, which may operate in both cellular communication and D2D communication modes, and which may simultaneously perform cellular communication with a base station and D2D communication with a D2D peer UE. The UE implements data bearers of cellular communication and D2D communication on different resources according to configuration, and the specific implementation method is as follows:
for resource partitioning between cellular communication and D2D communication, it can be done from both time and frequency dimensions, as shown in fig. 4, and from time domain, it can be divided into cellular communication sub-frames (Macro subframe) and D2D sub-frames (subframe), as shown in fig. 4 (a); when the frequency domain is divided, the frequency domain can be divided according to Physical Resource Blocks (PRBs), and all PRBs in the available bandwidth of the system are divided into two types, including: PRBs for cellular communication and PRBs for D2D communication, as shown in fig. 4 (b); in addition, the two may be combined and divided in a time domain + frequency domain manner, and as shown in fig. 4 (c), partial PRBs are further divided within the D2D subframe as D2D resources. As can be seen from the above, the resources include frequency domain resources and/or time domain resources.
Here, the D2D subframe and D2D PRB resources may be configured by the network side to the UE as subframes for D2D communication, or may be obtained by the UE through contention for resources according to the system specification as subframes for D2D communication; wherein the network side comprises one or more of the following entities: an evolved base station (eNB), a cell coordination entity (MCE), a Gateway (GW), a Mobility Management Equipment (MME), an Evolved Universal Terrestrial Radio Access Network (EUTRAN), and an Operation Administration and Maintenance (OAM) manager. In addition, on the D2D subframe, the UE may carry cellular communication data on a partial resource, namely: there may be data transmission for both D2D communication and cellular communication over the D2 Dsubframe.
The implementation method of the embodiment of the invention comprises the following steps: the UE respectively carries out independent data transmission on two slots (slots) of a D2D subframe; the data transmission comprises: transmission of data and/or reception of data;
specifically, the UE respectively performs independent signal transmission or reception on slot #0 and slot #1, including the following cases: the UE transmits a signal on slot #0 and receives a signal on slot #1, as shown in fig. 5 (a); alternatively, the UE receives the signal on slot #0Transmitting a signal on slot #1, as shown in fig. 5 (b); alternatively, the UE transmits signals to different nodes on slot #0 and slot #1, respectively, as shown in fig. 5 (c); alternatively, the UE receives signals from different nodes on slot #0 and slot #1, respectively, as shown in fig. 5 (d). Wherein the signals carry D2D communication data and/or cellular communication data; the node comprises: D2D communicates to the peer UE and/or network side. In FIG. 5, there are shownAndthe region indicates that the UE is in a signal transmitting state, as shownAndthe area indicates that the UE is in a signal receiving state.
In the invention, D2D subframe can carry D2D communication data; or, carry both D2D communication data and cellular communication data. Wherein the D2D communication data comprises: D2D control data and/or D2D traffic data between the UE and the D2D communication peer UE; the cellular communication data comprises: cellular communication control data and/or cellular communication traffic data between the UE and the network side.
The UE transmits signals on all or part of PRBs of the slot #0 or the slot #1, wherein the all or part of PRBs are configured by a network side, or are obtained by competition of the UE, or are used PRBs when the UE receives the signals on the slot #1 or the slot # 0; or,
the UE receives signals on all or part of PRBs of the slot #1 or the slot #0, wherein the all or part of PRBs are configured by a network side, or are obtained by competition of the UE, or are used PRBs when the UE transmits the signals on the slot #0 or the slot # 1.
Further, when the UE performs the transmission/reception state transition on the D2D subframe, a certain state transition time may be required; in addition, one subframe of the UE before the D2D subframe may be different from the transmitting or receiving state on the D2Dsubframe, and thus the state transition may also be required. Under the influence of the above two factors, the number of actually effective transmitted or received symbols of the UE at D2D subframe may be less than the number of symbols contained in a single time slot, so that:
when the UE transmits a signal on slot #0, and when the system employs Normal CP, the UE transmits a signal on symbol #0 to symbol #6, or symbol #1 to symbol #6, or symbol #0 to symbol #5, or symbol #1 to symbol # 5; when the system employs extended CP, the UE transmits signals on symbol #0 to symbol #5, or symbol #1 to symbol #5, or symbol #0 to symbol #4, or symbol #1 to symbol #4, as shown in fig. 6, which is a diagram showingThe region represents the active transmitted symbol.
When the UE transmits a signal on slot #1, and when the system employs Normal CP, the UE transmits a signal on symbol #7 to symbol #13, or symbol #8 to symbol #13, or symbol #7 to symbol #12, or symbol #8 to symbol # 12; when the system employs extended CP, the UE transmits signals on symbol #6 to symbol #11, or symbol #7 to symbol #11, or symbol #6 to symbol #10, or symbol #7 to symbol #10, as shown in fig. 7, which is shown in the figureThe region represents the active transmitted symbol.
When the UE receives a signal on slot #0, and when the system employs Normal CP, the UE receives signals on symbol #0 to symbol #6, or symbol #1 to symbol #6, or symbol #0 to symbol #5, or symbol #1 to symbol # 5; when the system employs extended CP, the UE receives signals on symbol #0 to symbol #5, or symbol #1 to symbol #5, or symbol #0 to symbol #4, or symbol #1 to symbol #4, as shown in fig. 8, which is a diagram showingThe region represents a valid received symbol.
UE receives signal on slot #1When the system employs Normal CP, the UE receives signals on symbol #7 to symbol #13, or symbol #8 to symbol #13, or symbol #7 to symbol #12, or symbol #8 to symbol # 12; when the system employs extended CP, the UE receives signals on symbol #6 to symbol #11, or symbol #7 to symbol #11, or symbol #6 to symbol #10, or symbol #7 to symbol #10, as shown in fig. 9, which showsThe region represents a valid received symbol.
The present invention will be described in further detail with reference to specific examples.
Example one
In this embodiment, on a network side, for example, on a D2D subframe configured by an eNB to a UE, the UE performs bidirectional transmission of D2D communication with a D2D opposite UE1, and on a slot #0, the UE transmits a signal carrying D2D communication data to the UE 1; on slot #1, the UE receives a signal from UE1 carrying D2D communication data.
Further, when D2D communication uses a dedicated frequency band configured by the system, the UE uses all PRBs in the dedicated frequency band to carry D2D traffic data on slot #0 and transmits to UE 1; the UE receives a signal containing all PRBs from UE1 on slot #1, which carries D2D traffic data for the UE1, as shown in fig. 10 (a).
Or, further, when D2D communication uses a dedicated frequency band configured by a system, the UE uses all PRBs in the dedicated frequency band to carry D2D traffic data on slot #0 and transmits to UE 1; the UE receives a signal from UE1 on slot #1 containing a partial PRB within the dedicated band carrying D2D control data for the UE1, e.g.: the D2D traffic data receives feedback information and/or D2D channel measurement report, as shown in fig. 10 (b).
Or, further, when D2D communication uses a dedicated frequency band configured by the system, the UE uses a partial PRB in the dedicated frequency band to carry D2D control data on slot #0 and transmits to UE 1; the UE receives a signal from UE1 on slot #1 containing all PRBs within the dedicated band, carrying D2D traffic data for the UE1, as shown in fig. 10 (c).
In FIG. 10, there are shownThe region indicates that the UE is in a signal transmitting state, as shownThe area indicates that the UE is in a signal receiving state.
Example two
In this embodiment, the UE acquires a certain D2D subframe resource through contention with other neighboring D2D UE pair, where in the D2D subframe, the UE communicates with D2D and performs bidirectional transmission of D2D communication on the peer UE1, and in slot #0, the UE receives a signal carrying D2D communication data from UE1, and in slot #1, the UE transmits a signal carrying D2D communication data to UE 1.
Further, on D2D subframe, D2D communication data signal is carried on PRB obtained by contention, UE is on slot #0, and signal carrying D2D traffic data from UE1 is received on PRB obtained by contention; the UE carries D2D traffic data on the above PRB of slot #1 and transmits to UE1, as shown in fig. 11 (a).
Or, further, on D2D subframe, the UE receives a signal carrying D2D traffic data from UE1 on slot #0 and on contention obtained PRBs; the UE transmits a D2D control data signal to the UE1 using preconfigured PRBs on slot #1, carrying D2D traffic data reception feedback information that the UE sends to the UE1, as shown in fig. 11 (b).
Or, further, on the D2D subframe, the D2D communication data signal is carried on a PRB obtained by contention, the UE receives a signal carrying D2D control data from the UE1 on a pre-configured PRB on slot #0, wherein the report on D2D channel measurement sent to the UE by the UE1 is carried; the UE carries D2D traffic data on slot #1 and on the contention obtained PRB and transmits to UE1, as shown in fig. 11 (c).
In FIG. 11, there are shownThe region indicates that the UE is in a signal transmitting state, as shownThe area indicates that the UE is in a signal receiving state.
EXAMPLE III
In this embodiment, on the network side, for example, on the D2D subframe configured by the eNB to the UE, the UE transmits the D2D communication data to the D2D communication peer UE1, and transmits the cellular communication data. On slot #0, the UE transmits signals carrying D2D communication data to UE1, and on slot #1, the UE transmits signals carrying cellular communication data to the eNB.
Further, on D2D subframe, UE transmits D2D-bearing traffic data to UE1 on slot #0 using PRB configured by eNB for D2D communication; the UE uses the PRB configured by the eNB for cellular communication on slot #1 to carry cellular communication service data and transmits the cellular communication service data to the eNB, as shown in FIG. 12Indicating that the UE is transmitting D2D communication signals, shownIndicating that the UE is transmitting a cellular communication signal.
Example four
In this implementation, on the D2D subframe configured by the eNB to the UE, the UE receives the D2D communication data signal transmitted by the D2D communication peer UE1 and receives the cellular communication data signal of the eNB. On slot #0, the UE receives a signal carrying cellular communication data from the eNB; on slot #1, the UE receives a signal from UE1 carrying D2D communication data.
Further, on D2D subframe, the UE receives control data signal of eNB on slot #0 pre-configured resource, which contains control data of cellular communication to the UE and scheduling information of D2D communication; the UE receives the D2D communication data signal of the UE1, which includes the D2D traffic data, on the PRB configured by the eNB of slot #1 and used for D2D communication, as shown in fig. 13Indicating reception of a cellular communication signal by a UE, shownIndicating that the UE received a D2D communication signal.
EXAMPLE five
In this embodiment, resources are divided by D2D communication and cellular communication in a frequency division manner, and on a frequency band configured for D2D communication, a UE occupies all PRBs of a D2D frequency band on one slot of a D2D subframe obtained by contention and transmits a D2D communication data signal to a D2D communication peer UE 1; all PRBs of the D2D band are received on another slot, carrying D2D communication data signals from UE 1. For example: on slot #0, the UE transmits a signal carrying D2D communication data to UE 1; on slot #1, the UE receives a signal from UE1 carrying D2D communication data.
Here, in the same subframe, the UE transmits in the first slot and switches to receive in the second slot, and then the UE needs a certain switching time from the transmitting state to the receiving state, that is, between slot #0 and slot #1, the UE needs a switching time Gap from the transmitting state to the receiving state. Taking a Normal CP as an example to explain by the system, the UE transmits a signal on slot #0 and performs state conversion on the last symbol of slot #0, so that the symbol #6 on slot #0 is used as a Gap and cannot carry data, and the effective transmission symbol of the UE includes symbols #0 to # 5; in slot #1, the UE receives data, and symbols #7 to #13 are all valid received symbols, as shown in fig. 14The region represents the effective transmitted symbol, shownThe region indicates the amount of Gap,the region represents a valid received symbol.
EXAMPLE six
In this embodiment, the D2D communication and the cellular communication adopt a time division manner to divide resources, on a configured D2D subframe, the UE transmits D2D communication data signals to two D2D communication opposite terminals UE1 and UE2, and on slot #0, the UE transmits signals carrying D2D communication data to UE 1; on slot #1, the UE transmits a signal carrying D2D communication data to UE 2.
Here, since the D2D communication and the cellular communication are time-division, the previous subframe and the next subframe of the current D2D subfame are cellular communication subframes, and the UE needs to be kept in a receiving state on the cellular communication subframes. Therefore, the UE is to make a transition from the receive state to the transmit state and a transition from the transmit state to the receive state within D2D subframe. Therefore, the first symbol of slot #0 and the last symbol of slot #1 need to be Gap, and cannot carry D2D communication data. Taking an extended CP as an example of a system for explanation, UE transmits a signal on slot #0, where symbol #0 is used as Gap, and the effective transmission symbols include symbols #1 to # 5; on slot #1, symbol #11 is Gap, and the effective transmission symbols include symbol #6 to symbol #10, as shown in fig. 15, which showsThe region represents the effective transmitted symbol, shownThe region indicates Gap.
EXAMPLE seven
In this embodiment, the D2D communication and the cellular communication adopt a frequency division + time division manner to divide resources, on configured D2D subframe and PRB resources, the UE communicates with D2D to transmit a D2D communication data signal to the UE1, and when the D2D communication data requirement is asymmetric, the cellular communication data signal can be transmitted on an idle slot.
For example: the UE receives D2D communication data signals from UE1 on PRB configured as D2D resource of D2D subframe slot #0 configured by eNB, and due to asymmetric D2D communication data requirement between UE and UE1, the UE only receives D2D communication data of UE1 and does not transmit data to UE1, so on current D2D subframe, the UE can use slot #1 to transmit cellular communication data signals to eNB, and carry and transmit cellular communication data between UE and eNB on Macro PRB configured by eNB for cellular communication.
Here, in the same subframe, the UE receives at slot #0 and switches to transmit at slot #1, and then the UE needs a certain switching time from the receiving state to the transmitting state, that is, between slot #0 and slot #1, the UE needs a switching time Gap from the receiving state to the transmitting state, where the Gap may be set as the last symbol of slot #0, as shown in fig. 16 (a), or the Gap may also be set as the first symbol of slot #1, as shown in fig. 16 (b).
Further, when the system supports D2D communication in the uplink frequency band, and the UE has cellular communication data transmission with the eNB in the previous subframe of the current D2D subframe, the UE needs to transition to the receiving state after finishing the signal transmission from the previous cellular communication subframe to the eNB, so as to receive the D2D signal in the D2D subframe slot #0, and therefore the first symbol #0 of the D2D subframe slot #0 serves as a transition Gap from the transmitting state to the receiving state, as shown in fig. 16 (a), (b). Taking Normal CP as an example, the UE first switches from the transmission state to the reception state in slot #0, receives the D2D signal of UE1, switches from the reception state to the transmission state in slot #6 of slot #0 or in slot #7 of slot #1, and transmits the data signal of cellular communication to the eNB in slot # 1. In the case shown in fig. 16 (a), the effective received symbols of the UE are symbol #1 to symbol #5, and the effective transmitted symbols are symbol #7 to symbol # 13; in the case shown in fig. 16 (b), the effective received symbols of the UE are symbol #1 to symbol #6, and the effective transmitted symbols are symbol #8 to symbol # 13.
In FIG. 16, shownThe region represents the valid D2D communication reception symbol, shownRegion represents Gap, shownArea representation efficient cellular communicationAnd transmitting the symbol.
The invention also provides a D2D communication data transmission system, which comprises UE; the UE is used for carrying out independent data transmission on two slots of a D2D subframe respectively; the data transmission comprises: transmission of data and/or reception of data.
Further, the UE is specifically configured to transmit a signal on slot #0 and receive a signal on slot # 1; or, receiving a signal on slot #0 and transmitting a signal on slot # 1; or transmitting signals to different nodes on slot #0 and slot #1 respectively; or, receiving signals from different nodes on slot #0 and slot #1, respectively; wherein the signal carries D2D communication data or cellular communication data.
Correspondingly, the UE further comprises: the data transmitting module and the data receiving module; wherein,
the data transmitting module is used for transmitting signals on slot # 0; alternatively, the signal is transmitted on slot # 1; or transmitting signals to different nodes on slot #0 and slot #1 respectively;
the data receiving module is used for receiving signals on slot # 1; or, receiving a signal on slot # 0; alternatively, signals from different nodes are received on slot #0 and slot #1, respectively.
Further, the data transmitting module is further configured to transmit a signal on all or a part of physical resource blocks PRB of slot #0 or slot #1, where all or a part of the PRBs are configured by a network side, obtained by a UE through contention, or are PRBs used when the UE receives a signal on slot #1 or slot # 0.
Further, the data receiving module is further configured to receive a signal on all or part of the PRBs of slot #1 or slot #0, where the all or part of the PRBs are configured by a network side, obtained by contention of the UE, or used by the UE when transmitting the signal on slot #0 or slot # 1.
The system further comprises: the D2D communication peer UE and the network side are respectively used for data transmission with the UE.
Wherein the network side comprises one or more of the following entities: eNB, MCE, GW, MME, EUTRAN, OAM manager.
The invention also provides the UE, which is the UE in the D2D communication data transmission system.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (20)
1. A device-to-device D2D communication data transmission method, the method comprising:
the method comprises the steps that User Equipment (UE) respectively carries out independent data transmission on two slot slots of a subframe of D2D; the data transmission comprises: transmission of data and/or reception of data;
the user equipment UE performing independent data transmission on two slot slots of a subframe of D2D includes: UE respectively transmits signals to different nodes on slot #0 and slot # 1; or, the UE receives signals from different nodes on slot #0 and slot #1, respectively; wherein the D2D subframe carries the D2D communication data and the cellular communication data simultaneously, and the carrying of the D2D communication data and the cellular communication data simultaneously is realized by transmitting the D2D communication data in one time slot and transmitting the cellular communication data in another time slot.
2. The D2D communication data transmission method according to claim 1, wherein the D2D subframe is a subframe configured by the network side to the UE for D2D communication; or subframes for D2D communication obtained by contention for the UE.
3. The D2D communication data transmission method according to claim 2, wherein the network side includes one or more of the following entities: an evolved node B eNB, a cell coordination entity MCE, a gateway GW, a mobility management device MME, an evolved universal terrestrial radio access network EUTRAN, and an operation administration and maintenance OAM manager.
4. The D2D communication data transmission method according to claim 1, 2 or 3, wherein the UE performs independent data transmission on two slots of D2D subframe, further comprising:
UE transmits a signal on slot #0 and receives a signal on slot # 1; or,
the UE receives a signal on slot #0 and transmits a signal on slot # 1.
5. The D2D communication data transmission method according to claim 4, wherein the signal carries D2D communication data or cellular communication data.
6. The D2D communication data transmission method according to claim 5, wherein the D2D communication data includes: D2D control data and/or D2D traffic data between the UE and the D2D communication peer UE;
the cellular communication data comprises: cellular communication control data and/or cellular communication traffic data between the UE and the network side.
7. The D2D communication data transmission method according to claim 4, wherein the node includes: D2D communicates to the peer UE and/or network side.
8. The D2D communication data transmission method according to claim 4, wherein the UE transmits a signal on slot #0 as:
when the system employs a Normal cyclic prefix Normal CP, the UE transmits signals on symbol #0 to symbol #6, or symbol #1 to symbol #6, or symbol #0 to symbol #5, or symbol #1 to symbol # 5; when the system employs an extended cyclic prefix extencdp, the UE transmits signals on symbol #0 to symbol #5, or symbol #1 to symbol #5, or symbol #0 to symbol #4, or symbol #1 to symbol # 4.
9. The D2D communication data transmission method according to claim 4, wherein the UE transmits a signal on slot #1 as:
when the system employs Normal CP, the UE transmits signals on symbol #7 to symbol #13, or symbol #8 to symbol #13, or symbol #7 to symbol #12, or symbol #8 to symbol # 12; when the system employs extended CP, the UE transmits signals on symbol #6 to symbol #11, or symbol #7 to symbol #11, or symbol #6 to symbol #10, or symbol #7 to symbol # 10.
10. The D2D communication data transmission method according to claim 4, wherein the UE receives signals on slot #0 as:
when the system employs Normal CP, the UE receives signals on symbol #0 to symbol #6, or symbol #1 to symbol #6, or symbol #0 to symbol #5, or symbol #1 to symbol # 5; when the system employs extended CP, the UE receives signals on symbol #0 to symbol #5, or symbol #1 to symbol #5, or symbol #0 to symbol #4, or symbol #1 to symbol # 4.
11. The D2D communication data transmission method according to claim 4, wherein the UE receives signals on slot #1 as:
when the system employs Normal CP, the UE receives signals on symbol #7 to symbol #13, or symbol #8 to symbol #13, or symbol #7 to symbol #12, or symbol #8 to symbol # 12; when the system employs extended CP, the UE receives signals on symbol #6 to symbol #11, or symbol #7 to symbol #11, or symbol #6 to symbol #10, or symbol #7 to symbol # 10.
12. The D2D communication data transmission method according to claim 4, wherein the method further comprises:
the UE transmits signals on all or part of physical resource blocks PRB of slot #0 or slot #1, wherein all or part of PRB is configured by a network side, or obtained by the UE through competition, or is used PRB when the UE receives signals on slot #1 or slot # 0.
13. The D2D communication data transmission method according to claim 4, wherein the method further comprises:
the UE receives signals on all or part of PRBs of the slot #1 or the slot #0, wherein the all or part of PRBs are configured by a network side, or are obtained by competition of the UE, or are used PRBs when the UE transmits the signals on the slot #0 or the slot # 1.
14. A D2D communication data transmission system, characterized in that, the system includes a user equipment UE, for independent data transmission on two slots of D2D subframe; the data transmission comprises: transmission of data and/or reception of data;
the user equipment UE performing independent data transmission on two slot slots of a subframe of D2D includes: respectively transmitting signals to different nodes on slot #0 and slot # 1; or, receiving signals from different nodes on slot #0 and slot #1, respectively; wherein the D2D subframe carries the D2D communication data and the cellular communication data simultaneously, and the carrying of the D2D communication data and the cellular communication data simultaneously is realized by transmitting the D2D communication data in one time slot and transmitting the cellular communication data in another time slot.
15. The D2D communication data transmission system according to claim 14, wherein the UE, specifically configured to transmit signals on slot #0 and receive signals on slot # 1; or, receiving a signal on slot #0 and transmitting a signal on slot # 1;
wherein the signal carries D2D communication data or cellular communication data.
16. The D2D communication data transmission system according to claim 15, wherein the UE further comprises: the data transmitting module and the data receiving module; wherein,
the data transmitting module is used for transmitting signals on slot # 0; alternatively, the signal is transmitted on slot # 1; or transmitting signals to different nodes on slot #0 and slot #1 respectively;
the data receiving module is used for receiving signals on slot # 1; or, receiving a signal on slot # 0; alternatively, signals from different nodes are received on slot #0 and slot #1, respectively.
17. The D2D communication data transmission system according to claim 16, wherein the data transmitting module is further configured to transmit signals on all or part of the physical resource blocks PRB of slot #0 or slot #1, where all or part of the PRBs are configured by the network side, or obtained by the UE through contention, or are PRBs used by the UE when receiving signals on slot #1 or slot # 0.
18. The D2D communication data transmission system according to claim 16, wherein the data receiving module is further configured to receive signals on all or part of the PRBs of slot #1 or slot #0, wherein all or part of the PRBs are configured by the network side, or are obtained by contention of the UE, or are PRBs used by the UE when transmitting signals on slot #0 or slot # 1.
19. The D2D communication data transmission system according to any one of claims 14 to 18, further comprising: the D2D communication peer UE and the network side are respectively used for data transmission with the UE.
20. A UE, characterized in that the UE is the UE of any one of claims 14 to 18;
the UE includes: the data transmitting module and the data receiving module; wherein,
the data transmitting module is used for transmitting signals on slot # 0; alternatively, the signal is transmitted on slot # 1; or transmitting signals to different nodes on slot #0 and slot #1 respectively;
the data receiving module is used for receiving signals on slot # 1; or, receiving a signal on slot # 0; alternatively, signals from different nodes are received on slot #0 and slot #1, respectively.
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| CN201310049663.8A CN103987026B (en) | 2013-02-07 | 2013-02-07 | A kind of device-to-device communication data transmission method, system and user equipment |
| PCT/CN2014/070585 WO2014121679A1 (en) | 2013-02-07 | 2014-01-14 | Device-to-device communication data transmission method, system, and user equipment |
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| US10334644B2 (en) | 2014-11-07 | 2019-06-25 | Sk Telecom Co., Ltd. | Apparatus and method for transmitting device to device communication channel in wireless communication system |
| KR102078424B1 (en) * | 2014-11-07 | 2020-02-19 | 이노스카이 주식회사 | Apparatus and method for transmitting device to device communication channel in wireless communication system |
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| CN1298581A (en) * | 1998-02-27 | 2001-06-06 | 西门子公司 | Telecommunications system with wireless code and time-division multiplex based telecommunication |
| CN102334370A (en) * | 2009-01-16 | 2012-01-25 | 诺基亚公司 | Apparatus and method for scheduling resources for device-to-device communication |
| CN102461297A (en) * | 2009-06-04 | 2012-05-16 | 诺基亚公司 | Effective labeling of subframes based on device-to-device transmission in cellular downlink spectrums |
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| EP2382833B1 (en) * | 2009-01-16 | 2018-08-08 | Nokia Technologies Oy | Enabling device-to-device communication in cellular networks |
| WO2011121374A1 (en) * | 2010-03-30 | 2011-10-06 | Nokia Corporation | Method and apparatus for device discovery through beaconing |
| KR20120074251A (en) * | 2010-12-27 | 2012-07-05 | 한국전자통신연구원 | Method for harq and link adaptaion of device to device link in direct communication between user equipments and relaying by user equipment |
| CN102927465B (en) * | 2012-10-11 | 2014-08-06 | 明基电通有限公司 | Light-emitting device and manufacturing method thereof |
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| CN1298581A (en) * | 1998-02-27 | 2001-06-06 | 西门子公司 | Telecommunications system with wireless code and time-division multiplex based telecommunication |
| CN102334370A (en) * | 2009-01-16 | 2012-01-25 | 诺基亚公司 | Apparatus and method for scheduling resources for device-to-device communication |
| CN102461297A (en) * | 2009-06-04 | 2012-05-16 | 诺基亚公司 | Effective labeling of subframes based on device-to-device transmission in cellular downlink spectrums |
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