WO2013034107A1

WO2013034107A1 - Method, device, and system that enable d2d data transmissions in cellular network

Info

Publication number: WO2013034107A1
Application number: PCT/CN2012/081169
Authority: WO
Inventors: 雷蕾; 胡南; 胡臻平
Original assignee: 中国移动通信集团公司
Priority date: 2011-09-08
Filing date: 2012-09-10
Publication date: 2013-03-14
Also published as: CN103002578A; CN103002578B

Abstract

A method, device, and system that enable device-to-device (D2D) data transmissions in a cellular network. The major content comprises: a resources allocation method, specifically: a base station receives a data transmission request from a first user equipment (UE); a D2D connection has already been established between the first UE and a second UE; allocating wireless resources for data transmissions between the first UE and the second UE according to the received data transmission request, and transmitting the wireless resources allocation result to the first UE and/or the second UE; a data transmission method, specifically: the first UE transmits a data transmission request to the base station; the first UE and the second UE receive the wireless resources allocation result from the base station; the first UE uses the wireless resources allocated by the base station to transmit data to the second UE, and the second UE uses the wireless resources allocated by the base station to receive the data transmitted by the first UE. The present method enables D2D data transmissions in a cellular network.

Description

Method, device and system for realizing D2D data transmission in a cellular network. The present application claims to be filed on September 8, 2011, the Chinese Patent Office, the application number is 201110264727.7, and the invention is entitled "Method and device for realizing D2D data transmission in a cellular network" The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to the field of communications technologies, and more particularly to a method, device and system for implementing D2D (Device to Device Communication) data transmission in a cellular network. Background technique

D2D (Device to Device Communication) refers to a technology that directly communicates without the need for infrastructure between user equipments. Bluetooth, WIFI (Wireless Fidelity) and other technologies in the existing communication field. Both belong to D2D technology. The existing cellular network does not support D2D, and communication between user equipments must be forwarded through the base station. If D2D can be implemented in the cellular network, the user equipment with a relatively close distance can directly transmit data with the other party when the other party is found, thereby saving the air interface and core network resources of the communication network, and also providing new services, such as a game of competition. , Near Field Broadcasting, M2M (Machine to Machine Communication), etc. Therefore, how to implement D2D in cellular networks has become a research hotspot.

At present, most of the research results are focused on academic theory research such as algorithms for realizing D2D resource allocation, and in actual cellular networks, especially in LTE (Long Term Evolution) network, D2D resource allocation and data transmission are realized. There is not much research on related signaling, which means that there is currently no way to implement D2D resource allocation and data transmission in cellular networks. Summary of the invention

In view of this, embodiments of the present invention provide a method for implementing D2D data transmission in a cellular network. The method is to solve the problem of realizing D2D resource allocation and data transmission in a cellular network. An embodiment of the present invention provides a method for implementing D2D resource allocation in a cellular network, including: receiving, by a base station, a data transmission request sent by a first user equipment UE; wherein, the device is established between the first UE and the second UE To the device communication D2D connection;

And allocating a wireless resource to the data transmission between the first UE and the second UE according to the received data transmission request, and transmitting the radio resource allocation result to the first UE and/or the second UE.

The embodiment of the invention further provides a method for implementing D2D data transmission in a cellular network, which includes:

The first user equipment UE sends a data transmission request to the base station, where a device-to-device communication D2D connection is established between the first UE and the second UE;

The first UE and the second UE receive the radio resource allocation result returned by the base station, where the base station allocates radio resources for data transmission between the first UE and the second UE according to the received data transmission request; The wireless resource transmits data to the second UE, and the second UE receives the data transmitted by the first UE by using the radio resource allocated by the base station.

An embodiment of the present invention provides an apparatus for implementing D2D resource allocation in a cellular network, including: a first receiving unit, configured to receive a data transmission request sent by a first user equipment UE, where the first UE and the second UE Device-to-device communication D2D connection has been established;

a resource allocation unit, configured to allocate a radio resource for data transmission between the first UE and the second UE according to the received data transmission request;

The first sending unit is configured to send the radio resource allocation result to the first UE and/or the second UE. Embodiments of the present invention provide a base station, including the foregoing apparatus for implementing D2D resource allocation in a cellular network.

An embodiment of the present invention provides an apparatus for implementing D2D data transmission in a cellular network, including: a second sending unit, configured to send a data transmission request to a base station, where the first

A device-to-device communication D2D connection has been established between the UE and the second UE;

a second receiving unit, configured to receive a radio resource allocation result returned by the base station according to the received data transmission request sent by the second sending unit, where the radio resource allocation result includes the base station according to the connection Receiving, by the data transmission request, a radio resource allocated for data transmission between the first UE and the second UE;

And a data transmission unit, configured to transmit data to the second UE by using the radio resource allocated by the base station. An embodiment of the present invention provides another apparatus for implementing D2D data transmission in a cellular network, including:

a third receiving unit, configured to receive a radio resource allocation result returned by the base station according to the received data transmission request sent by the first user equipment UE, where the device-to-device communication is established between the second UE and the first UE a D2D connection; the radio resource allocation result includes a radio resource allocated by the base station for data transmission between the second UE and the first UE;

And a data receiving unit, configured to receive data transmitted by the first UE by using a radio resource allocated by the base station. Embodiments of the present invention provide a user equipment, including at least one of the foregoing devices for implementing D2D data transmission in a cellular network.

An embodiment of the present invention provides a communication system, including at least one of the foregoing base stations and at least two user equipments;

Wherein, the user equipment as the data transmission party includes at least a second sending unit, a second receiving unit, and a data transmission unit, and the device that implements D2D data transmission in the cellular network, and the user equipment as the data receiver includes at least the third receiving. A means for implementing D2D data transmission in a cellular network by a unit, a data receiving unit.

The beneficial effects of the present invention are as follows:

The embodiment of the present invention provides a method for implementing D2D resource allocation and data transmission in a cellular network. After the first UE and the second UE establish a D2D connection, the first UE sends a data transmission request to the base station, and after receiving the data transmission request, the base station receives the data transmission request. Allocating radio resources for data transmission between the first UE and the second UE, and transmitting the radio resource allocation result to the first UE and/or the second UE, where the first UE and the second UE receive the radio resource allocation result returned by the base station The first UE uses the radio resource allocated by the base station to transmit data to the second UE, and the second UE receives the data transmitted by the first UE by using the radio resource allocated by the base station, thereby completing D2D resource allocation and data transmission in the cellular network. Because it is the base station for resource allocation, it is convenient to control, manage and charge network resources, and can monitor in real time. Control the status of the network to provide users with better service quality. After the base station allocates resources for the first UE and the second UE, the first UE and the second UE use the resources allocated by the base station to perform data transmission, which also implements data transmission in the D2D in the cellular network. DRAWINGS

1 is a flowchart of a method for D2D resource allocation in an embodiment of the present invention;

2 is a schematic diagram of D2D resource allocation and data transmission signaling interaction in an embodiment of the present invention; FIG. 3 is a flowchart of a D2D data transmission method according to an embodiment of the present invention;

4 is a schematic structural diagram of a guard band between time division duplexing and frequency division duplexing according to an embodiment of the present invention;

5 is a flowchart of a method for D2D resource allocation and data transmission in a preferred embodiment of the present invention; FIG. 6 is a structural diagram of an apparatus for D2D resource allocation according to an embodiment of the present invention;

7 is a structural diagram of an apparatus for transmitting D2D data in an embodiment of the present invention;

FIG. 8 is a structural diagram of another apparatus for D2D data transmission according to an embodiment of the present invention. detailed description

The present invention provides a method for implementing D2D resource allocation in a cellular network, and the process of the method of the present invention is as shown in FIG. 1 , and FIG. 2 is performed for solving the problem of implementing D2D resource allocation and data transmission in a cellular network. The channel and signaling used in each step in Figure 1 are as follows:

Step S11: The base station receives a data transmission request sent by the first UE (User Equipment).

Before performing the above steps, a D2D (Device to Device Communication) connection is established between the first UE and the second UE. When data needs to be transmitted between the first UE and the second UE, first, the data transmission request is sent by the base station in the data transmission direction, and the base station receives the data transmission request sent by the data transmission side. In a practical application, the first UE may be the data transmission party, the second UE may be the data receiver, or the second UE may be the data transmission party. The first UE acts as a data receiver. In the following description, the first UE is used as the data transmission party, and the second UE is taken as the data receiver as an example.

Specifically, the receiving, by the base station, the data transmission request sent by the first UE, the method includes: receiving, by the base station, a buffer status report control signaling sent by the first UE by using a physical uplink shared channel (PUSCH), where the buffer status report is The control signaling carries data request information.

According to the LTE protocol, the first UE initiates a BSR (Buffer Status Report) control signaling to the base station (eNodB), and the signaling may be sent in the PUSCH. When the PUSCH is used to send the BSR control signaling, the first UE first sends an SR (Scheduling Request) control signaling to the base station, and the signaling may be sent through a Physical Uplink Control Channel (PUCCH). After receiving the SR control signaling, the base station allocates a small amount of uplink resources to the first UE, that is, allocates a small number of PUSCHs for the first UE to send BSR control signaling to the base station.

Step S12: Allocating radio resources for data transmission between the first UE and the second UE according to the received data transmission request.

In an LTE system, a base station generally considers the channel quality of each radio link when performing resource allocation.

Specifically, the foregoing base station allocates radio resources for data transmission between the first UE and the second UE according to the received data transmission request, and includes: the base station monitors and receives the first that is sent by the first UE and the second UE by using a physical uplink control channel. Channel quality indication information of a channel between the UE and the second UE; determining a radio resource channel quality between the first UE and the second UE according to the received channel quality indication information, and determining, according to the determined quality of the radio resource channel A UE and a second UE allocate radio resources.

When the D2D is used for resource allocation in the cellular network, the base station can learn the first UE and the second UE by using the CQI (Channel Quality Indicator Information) reported by the first UE and the second UE periodically or aperiodically. The channel condition between. Since the first UE and the second UE have established a D2D connection, the first UE and the second UE periodically report the CQI of the channel between the first UE and the second UE to the base station, where the CQI can be sent through the PUCCH. Here first UE/ The second UE has the capability of performing channel estimation according to the SRS (Sounding Reference Signal) sent by the second UE/first UE. However, the LTE base station in the prior art has this capability, but the user equipment supporting LTE does not have this capability.

Step S13: Send the radio resource allocation result to the first UE and/or the second UE.

Specifically, the foregoing sending the radio resource allocation result to the first UE and/or the second UE may be performed in the following manners:

The first type: the base station sends, by using a PDCCH (Physical Downlink Control Channel), the first radio resource allocation signaling that carries the first UE identifier information to the first UE, and the second UE that carries the second UE identifier information. The radio resource allocation signaling is sent to the second UE.

In the LTE system, when the base station sends signaling to the user equipment, the base station carries the radio network temporary identifier (C-RNTI) of the user equipment, so the user equipment can blindly detect when receiving various signaling sent by the base station. Carry the signaling of its own C-RNTI.

The base station sends the first radio resource allocation signaling that carries the C-RNTI of the first UE to the first UE, and sends the second radio resource allocation signaling that carries the C-RNTI of the second UE to the second UE, and then, The first UE and the second UE only need to blindly detect the signaling carrying the C-RNTI of the UE, and the C-RNTI is used as the identifier information. This method does not increase the number of blind detections by the UE.

The second type: the base station sends, by using the PDCCH, the third radio resource allocation signaling that carries the first UE identity information and the radio resource scheduling identifier to the first UE.

The base station sends the third radio resource allocation signaling in the format of the C-RNTI and the DCI (Downlink Control Information) of the first UE to the first UE, where the DCI format is used as the radio resource scheduling identifier. Then, the first UE and the second UE can simultaneously detect the third radio resource allocation signaling carrying the C-RNTI of the first UE and the DCI format, that is, the radio resources allocated by the base station can be obtained.

Here, the second UE may blindly detect the signaling that is sent by the base station and includes the first UE identifier information, and the second UE obtains the first UE identifier information when establishing the D2D connection with the first UE. In this case, an error may occur, because the base station sends a lot of signaling to the first UE, and the second UE may send the base station to the first UE, which is not used for allocating resources, as the radio resource allocation signaling. example For example, in step S11, the base station responds to the SR control signaling sent by the first UE, where the response command is used to allocate the PUSCH resource to the first UE, so that the first UE sends the BSR control signaling, instead of being used for the first UE. Data is transmitted to the second UE. In order to avoid the occurrence of the above error, the Flag for formatO/formatlA differentiation field identifier in the DCI format may be used to indicate whether signaling sent by the base station is used for allocating radio resources, so as to facilitate data transmission with the second UE.

The third type: the base station sends the fourth radio resource allocation signaling carrying the second UE identity information and the radio resource scheduling identifier to the second UE by using the PDCCH.

The base station sends the fourth radio resource allocation signaling that carries the C-RNTI of the second UE and the Downlink Control Information (DCI) format to the second UE, where the DCI format is used as the radio resource scheduling identifier. At this time, the first UE and the second UE may simultaneously detect the fourth radio resource allocation signaling carrying the C-RNTI of the second UE and the DCI format, that is, the radio resources allocated by the base station may be obtained.

Here, the first UE may blindly detect the signaling that is sent by the base station and includes the second UE identity information, where the first UE obtains the second UE identity information when establishing a D2D connection with the second UE. The reason for carrying the radio resource scheduling identifier in the fourth radio resource allocation signaling is the same as the second case, and will not be described again.

The above two methods do not increase the signaling overhead, but need to increase the number of blind detections of the UE. In the actual situation, the UE only needs to detect the corresponding DCI format in the signaling. Therefore, the number of blind detections that the UE needs to increase is not large.

Only the channel and signaling used in the first mode are shown in Fig. 2, and the case of channel and signaling used in the second mode and the third mode are not shown.

Preferably, after step S13, the method further includes:

Step S14: The base station receives a data reception result returned by the second UE after receiving the data transmitted by the first UE using the radio resource allocated by the base station, and determines whether to retransmit between the first UE and the second UE according to the received data receiving result. The data retains the allocated radio resources.

When the second UE receives the data transmitted by the first UE, it is possible that the reception is successful, and the reception may fail. Therefore, the second UE needs to return a data reception result to the base station. Specifically, the receiving, by the base station, the data receiving result that is returned by the second UE after receiving the data that is transmitted by the first UE by using the radio resource allocated by the base station, includes: receiving, by the base station, that the second UE transmits the time-frequency transmission set in the PUCCH. The data receiving feedback signaling of the ACK/failed NACK information; or the base station receiving the data receiving feedback signaling that carries the successful ACK/failed NACK information sent by the second UE through the guard band between the frequency division duplex and the time division duplex of the PUCCH.

The second UE may carry the ACK/NACK information in the data receiving feedback signaling sent to the base station, and when the data receiving feedback signaling carries the NACK, the base station may retransmit the data reservation between the first UE and the second UE. The previously allocated radio resources; when the data reception feedback signaling carries an ACK, the base station does not need to reserve the previously allocated radio resources for them.

The embodiment of the present invention provides a method for implementing D2D data transmission in a cellular network. The process is shown in FIG. 3. FIG. 2 shows the channel and signaling used when performing the steps in FIG. 3, and the steps are as follows:

Step S21: The first UE sends a data transmission request to the base station.

Before performing the above steps, a D2D connection is established between the first UE and the second UE.

Specifically, the sending, by the first UE, the data transmission request to the base station includes: sending, by the first UE, the buffer status report control signaling to the base station by using the PUCCH.

According to the LTE protocol, the first UE initiates BSR control signaling to the base station, and the signaling may be sent in the PUSCH. When the PUSCH does not send the BSR control signaling, the first UE first sends the SR control signaling to the base station, and the signaling may be sent through the PUCCH. After receiving the SR control signaling, the base station allocates a small amount of uplink resources to the first UE. That is, a small number of PUSCHs are allocated to transmit BSR control signaling.

Step S22: The first UE and the second UE receive the radio resource allocation result returned by the base station, where the base station allocates a radio resource for data transmission between the first UE and the second UE according to the received data transmission request.

Specifically, the foregoing first UE and the second UE receive the radio resource allocation result returned by the base station, and the first UE and the second UE receive the three types of the sending manners of the base station in the step S13. The first type: the first UE blindly detects the first radio resource allocation signaling that carries the self-identification information, and the second UE blindly detects the second radio resource allocation signaling that carries the self-identification information.

The first UE and the second UE only need to blindly detect the signaling with its own C-RNTI. This method does not increase the number of UE blind detections, but it increases the signaling overhead compared with the traditional LTE network resource allocation method.

The second UE: The first UE blindly detects the fourth radio resource allocation signaling that carries the second UE identifier information and the radio resource scheduling identifier. The first UE and the second UE obtain the peer identifier information when establishing the D2D connection.

The first UE and the second UE may simultaneously detect the fourth radio resource allocation signaling carrying the C-RNTI and the DCI format of the second UE, that is, the radio resources allocated by the base station may be obtained.

Third: The second UE blindly detects the third radio resource allocation signaling carrying the first UE identification information and the radio resource scheduling identifier.

The first UE and the second UE may simultaneously detect the third radio resource allocation signaling carrying the C-RNTI of the first UE and the DCI format, that is, the radio resources allocated by the base station may be obtained.

Step S23: The first UE transmits data to the second UE by using the radio resource allocated by the base station, and the second UE receives the data transmitted by the first UE by using the radio resource allocated by the base station.

Specifically, the first UE uses the radio resource allocated by the base station to transmit data to the second UE, and the second UE uses the radio resource allocated by the base station to receive the data transmitted by the first UE, which specifically includes: the radio allocated by the first UE according to the base station by using the PUCCH. The resource transmits data to the second UE, and the second UE receives the data transmitted by the first UE according to the radio resource allocated by the base station by using the PUCCH.

Since there is no difference between uplink and downlink when the first UE and the second UE perform data transmission in the D2D. Here, PUSCH is used instead of PDSCH for data transmission. The main consideration is to minimize the complexity of user equipment implementation and the degree of protocol modification. Since the user equipment cannot transmit the downlink common pilot signal, it will interfere with the common pilot channel of the base station, so the PUSCH is selected for data transmission.

Here, the second UE has the capability of demodulating the uplink pilot signal and data, and the base station in the prior art LTE system has the capability, but the user equipment does not have the capability. Specifically, after the foregoing step S23, the method further includes:

Step S24: The second UE returns a data receiving result to the first UE and the base station.

When the second UE receives the data transmitted by the first UE, it is possible that the reception is successful, and the reception may fail. Therefore, the second UE needs to return the data reception result to the first UE and the base station. In the existing LTE system, signaling for performing ACK/NACK feedback on uplink data is transmitted through a PHICH (Physical Hybrid ARQ Indicator Channel). Considering that the PHICH cannot be well multiplexed with the PUSCH, it is transmitted using PUCCH. In the LTE system, the PUCCH can carry the ACK/NACK feedback of the downlink data, but its time-frequency position is related to the time-frequency position of the PDCCH indicating the resource allocation for the downlink data. On the other hand, the PDCCH for resource allocation indication for D2D data transmission is transmitted by the base station in the previous one or more subframes of the actual data transmission, so that the PUCCH carrying the D2D connection ACK/NACK information and the ACK carrying the normal cellular connection may occur. The time-frequency positions of the PUCCH of the /NACK information collide and interfere with each other.

In order to solve the above problems, the specific solutions can be solved in the following two ways:

First, the second UE sends data reception feedback signaling carrying the successful ACK/failed NACK information to the base station by using the time frequency set in the PUCCH.

Here, the base station may specifically reserve the time-frequency position of the transmission data receiving feedback signaling for the D2D, and the second UE needs to send the data receiving feedback signaling carrying the ACK/NACK information to the first UE and the base station, directly through the reserved Send at the time-frequency position.

Second, the second UE sends data reception feedback signaling carrying the successful ACK/failed NACK information to the base station through the guard band between the PUCCH intermediate frequency division duplex and the time division duplex.

Using the carrier aggregation technology in the LTE-A system, D2D data is transmitted on an Extension Carrier, and data of a normal cellular network is transmitted on other carriers. Thus, there is no problem of PUCCH collision between the D2D connection and the normal cellular network connection. As shown in FIG. 4, a scenario in which the method is used is to perform D2D data transmission by using a guard band between TDD (Time Division Duplex) and FDD (Frequency Division Duplex). In the process of implementing D2D resource allocation and data transmission in the present invention, only the PDCCH uses downlink resources, and in the carrier aggregation system, the PDCCH is transmitted on the normal TDD carrier, and is not extended. Transmission on the wave. Therefore, carrying a D2D connection on an extension carrier only occupies uplink resources. By using the protection bandwidth between the TDD and FDD uplink frequencies as the extension carrier for transmitting the D2D connection data, the idle resource can be fully utilized without causing interference to the TDD and FDD common carriers.

Preferably, after step S24, the method further includes:

Step S25: The first UE determines whether to retransmit data to the second UE device according to the received data receiving result.

Specifically, the determining, by the first UE, whether to retransmit data to the second UE device according to the received data receiving result includes: receiving, by the first UE, a successful ACK/failed NACK sent by the second UE by using a time frequency set in the PUCCH The data of the information is received by the feedback signaling; or the data receiving feedback signaling carrying the successful ACK/failed NACK information sent by the second UE through the guard band between the frequency division duplex and the time division duplex in the PUCCH is received.

The second UE may carry the ACK/NACK information in the data receiving feedback signaling sent to the base station. When the data receiving feedback signaling carries the NACK, the first UE may use the base station as the first UE and the second UE. Retransmitting data to retain previously allocated radio resources, and transmitting data to the second UE; when the data reception feedback signaling carries an ACK, the first UE does not use the base station to retransmit data retention between the first UE and the second UE. The previously allocated radio resource transmits data to the second UE.

The specific process of implementing D2D resource allocation and data transmission in a cellular network is illustrated by a specific embodiment. As shown in FIG. 5, the steps are as follows:

Step S31: The first UE sends the SR control signaling to the base station by using the PUCCH.

After the first UE establishes a D2D connection with the second UE, the first UE serves as a data transmission party, the second UE serves as a data receiver, the first UE transmits data to the second UE, and the base station does not provide a PUCCH to the first UE to send a message. In order to time, the first UE first sends SR control signaling to the base station.

Step S32: After receiving the SR control signaling, the base station allocates a PUSCH to the first UE to send the BSR control signaling.

Step S33: The first UE sends the BSR control signaling by using the PUSCH allocated by the base station.

Step S34: After receiving the BSR control signaling sent by the first UE, the base station according to the first UE and the first The CQI of the channel between the first UE and the second UE transmitted by the UE through the PUCCH allocates radio resources for data transmission between the first UE and the second UE.

After the D2D connection is established between the first UE and the second UE, the first UE and the second UE periodically or aperiodically send the CQI of the channel between the first UE and the second UE to the base station.

Step S35: The base station sends, by using the PDCCH, the C-RNTI carrying the first UE and the third radio resource allocation signaling in the DCI format to the first UE.

Here, only the second of the three cases mentioned in the above step S13 will be described as an example.

Step S36: The first UE and the second UE blindly detect the third radio resource allocation signaling including its own C-RNTI and DCI format.

Step S37: The first UE transmits data to the second UE by using the radio resource allocated by the base station, and the second UE receives the data transmitted by the first UE by using the radio resource allocated by the base station.

Step S38: The second UE sends data receiving feedback signaling carrying the ACK/NACK information to the base station and the first UE by using the time-frequency position of the PUCCH reserved by the base station for the D2D, and the second UE sends the data receiving with the NACK. When the signaling is feedback, step S39 is performed; when the second UE sends the data receiving feedback signaling that carries the ACK, step S40 is performed.

Step S39: The base station reserves the previously allocated radio resources for retransmitting data between the first UE and the second UE.

Step S40: The first UE retransmits data to the second UE by using the radio resource reserved by the base station, and the second UE receives the data transmitted by the first UE by using the radio resource reserved by the base station.

Step S41: The second UE successfully receives the data, and the process ends.

It is assumed here that after the first UE retransmits data to the second UE, the second UE may successfully receive. In an actual situation, if the second UE still cannot successfully receive the data transmitted by the first UE, step S37 may be looped. Step S39 until the second UE successfully receives the data transmitted by the first UE.

The device for implementing D2D resource allocation in a cellular network, which is provided by the embodiment, provides an apparatus for implementing D2D resource allocation in a cellular network, and may be set in a base station or other network device for implementing D2D resource allocation. Its structure is shown in Figure 6, including: The first receiving unit 11 is configured to receive a data transmission request sent by the first user equipment UE, where a device-to-device communication D2D connection is established between the first UE and the second UE.

The resource allocation unit 12 is configured to allocate a radio resource for data transmission between the first UE and the second UE according to the received data transmission request.

The first sending unit 13 is configured to send the radio resource allocation result to the first UE and/or the second

UE.

Specifically, the foregoing first receiving unit 11 is specifically configured to: receive, by using the physical uplink shared channel, the buffer status report control signaling by the first UE.

Specifically, the foregoing resource allocation unit 12 is specifically configured to: monitor channel quality indication information of a channel between the first UE and the second UE that is sent by using the physical uplink control channel by the first UE and the second UE; The channel quality indication information determines a radio resource channel quality between the first UE and the second UE, and allocates radio resources to the first UE and the second UE according to the determined radio resource channel quality.

Specifically, the foregoing first sending unit 13 is specifically configured to: send, by using a physical downlink control channel, first radio resource allocation signaling that carries the first UE identifier information to the first UE, and that is to carry the second UE identifier information. Transmitting, by the physical downlink control channel, the third radio resource allocation signaling that carries the first UE identifier information and the radio resource scheduling identifier to the first UE, or by using a physical downlink control channel. And transmitting fourth radio resource allocation signaling that carries the second UE identity information and the radio resource scheduling identifier to the second UE.

Preferably, the foregoing apparatus for implementing D2D resource allocation in a cellular network further includes: a first determining unit 14.

Specifically, the first receiving unit 11 is further configured to receive a data receiving result that is returned after the second UE receives the data transmitted by the first UE using the radio resource allocated by the base station.

The first determining unit 14 is configured to determine, according to the received data receiving result, whether the reserved radio resource is reserved for retransmission data between the first UE and the second UE, and instruct the resource allocating unit to reserve the allocated wireless according to the determined result. Resources.

Specifically, the foregoing first receiving unit 11 is specifically configured to: receive the second UE by physical uplink The data receiving feedback signaling carrying the successful ACK/failed NACK information sent in the time-frequency set in the control channel; or receiving the carrying of the protection band sent by the second UE through the physical uplink control channel in the frequency division duplex and the time division duplex Data reception feedback signaling of successful ACK/failed NACK information.

The device for implementing the D2D data transmission in the cellular network is provided by the embodiment, and the device for implementing the D2D data transmission in the cellular network is provided in the user equipment for implementing the D2D data transmission. Its structure is shown in Figure 7, including:

The second sending unit 21 is configured to send a data transmission request to the base station, where a device-to-device communication D2D connection is established between the first UE and the second UE.

The second receiving unit 22 is configured to receive a radio resource allocation result returned by the base station according to the received data transmission request sent by the second sending unit, where the radio resource allocation result includes, by the base station, the first UE according to the received data transmission request. A wireless resource allocated for data transmission between the second UEs.

The data transmission unit 23 is configured to transmit data to the second UE by using the radio resource allocated by the base station. Specifically, the foregoing second sending unit 21 is specifically configured to: send the buffer status report control signaling to the base station by using a physical uplink shared channel.

Specifically, the foregoing second receiving unit 22 is specifically configured to: blindly detect the first radio resource allocation signaling that carries the identifier information of the first UE where the UE is located; or blindly detect the second UE identifier information and the radio resource scheduling identifier. The fourth radio resource allocation signaling is obtained by the first UE and the second UE that are located in the D2D connection.

Specifically, the foregoing data transmission unit 23 is specifically configured to: transmit data to the second UE according to the radio resource allocated by the base station by using the physical uplink shared channel.

Preferably, the second receiving unit 22 is further configured to: receive a data receiving result returned by the second UE after receiving the data transmitted by the data transmission unit.

Specifically, the foregoing second receiving unit 22 is specifically configured to: receive data receiving feedback signaling that carries the successful ACK/failed NACK information sent by the second UE by using the time-frequency set in the physical uplink control channel; or receive the second UE. Data receiving feedback signaling carrying successful ACK/failed NACK information transmitted through the guard band between the frequency division duplex and the time division duplex in the physical uplink control channel. Preferably, the foregoing apparatus for implementing the D2D data transmission in the cellular network further includes: a second determining unit 24, configured to determine, according to the received data receiving result, whether to retransmit the data to the second UE device, and according to the determined result Instructs the data transfer unit to transfer data.

Based on the foregoing another method for implementing D2D data transmission in a cellular network, the embodiment of the present invention further provides another device for implementing D2D data transmission in a cellular network, which can be set to implement D2D data transmission. In the user equipment, its structure is as shown in FIG. 8, and includes:

The third receiving unit 31 is configured to receive a radio resource allocation result returned by the base station according to the received data transmission request sent by the first user equipment UE, where the device-to-device is established between the second UE and the first UE The communication D2D connection; the radio resource allocation result includes a radio resource allocated by the base station for data transmission between the second UE and the first UE where the base station is located.

The data receiving unit 32 is configured to receive data transmitted by the first UE by using the radio resource allocated by the base station.

Specifically, the foregoing third receiving unit 31 is specifically configured to: blindly detect the second radio resource allocation signaling that carries the self-identification information; or blindly detect the third radio resource allocation that carries the first UE identifier information and the radio resource scheduling identifier. The first UE and the second UE where the first UE is located obtain the peer identification information when establishing the D2D connection.

Specifically, the foregoing third receiving unit 31 is specifically configured to: receive data transmitted by the first UE according to the radio resource allocated by the base station by using the physical uplink shared channel.

Preferably, the device for implementing D2D data transmission in the cellular network further includes: a third sending unit 33, configured to return, to the first UE and the base station, a data receiving result after receiving the data transmitted by the first UE.

Specifically, the foregoing third sending unit 33 is specifically configured to: send, by using a time-frequency set in the physical uplink control channel, data receiving feedback signaling that carries the successful ACK/failed NACK information to the base station; or the second UE passes the physical uplink control. The guard band between the channel intermediate frequency division duplex and the time division duplex transmits data reception feedback signaling carrying the successful ACK/failed NACK information to the base station.

When the apparatus for implementing D2D data transmission in the cellular network in the UE includes each unit as shown in FIG. 7, it can be used as the first UE; when the UE implements D2D data transmission in the cellular network When the device for transmission includes each unit as shown in FIG. 8, it can be used as the second UE. When the apparatus for implementing D2D data transmission in the cellular network in the UE includes the units as shown in FIG. 7 and FIG. 8, it can be used for both the first UE and the second UE. In other words, the UE may include only the device shown in FIG. 7 as the first UE, may include only the device second UE as shown in FIG. 8, or may include the device as shown in FIG. 7 and as shown in FIG. The device acts as the first UE and/or the second UE.

The embodiment of the present invention further provides a communication system, which includes: the method for implementing the D2D resource allocation and the data transmission in the cellular network.

At least one of the above-described base stations, and at least two of the devices including the means for realizing D2D data transmission in the cellular network as shown in Fig. 7 and the means for realizing D2D data transmission in the cellular network as shown in Fig. 8.

At least one of the above-mentioned base stations, at least one user equipment including means for implementing D2D data transmission in a cellular network as shown in FIG. 7 or FIG. 8, and at least one including D2D data transmission in a cellular network as shown in FIG. And a user equipment of the apparatus for implementing D2D data transmission in a cellular network as shown in FIG.

At least one of the above-described base stations, at least one user equipment comprising means for implementing D2D data transmission in a cellular network as shown in FIG. 7, and at least one apparatus comprising D2D data transmission implemented in a cellular network as shown in FIG. User equipment.

In summary, the communication system in this embodiment includes: at least one of the foregoing base stations and at least two user equipments; wherein, the user equipment as the data transmission party includes at least D2D data transmission implemented in the cellular network as shown in FIG. The device, the user equipment as the data receiver, includes at least a device for realizing D2D data transmission in the cellular network as shown in FIG. 8.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Therefore, the present invention can be implemented in an entirely hardware embodiment, an entirely software embodiment, Or in the form of an embodiment of the software and hardware aspects. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and/or blocks in the flowcharts and/or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and modifications The spirit and scope of the embodiments of the present invention are departed. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

Rights request

A method for implementing D2D resource allocation in a cellular network, comprising: receiving, by a base station, a data transmission request sent by a first user equipment UE; wherein, the device is established between the first UE and the second UE To the device communication D2D connection;

The method according to claim 1, wherein the receiving, by the base station, the data transmission request sent by the first UE, specifically includes:

The base station receives the buffer status report control signaling sent by the first UE through the physical uplink shared channel.

The method according to claim 1, wherein the base station allocates radio resources for data transmission between the first UE and the second UE according to the received data transmission request, and specifically includes: Channel quality indication information of a channel between the first UE and the second UE that is sent by the UE and the second UE through the physical uplink control channel;

And determining, according to the received channel quality indication information, a radio resource channel quality between the first UE and the second UE, and allocating radio resources to the first UE and the second UE according to the determined radio resource channel quality.

The method of claim 1, wherein the sending the radio resource allocation result to the first UE and/or the second UE comprises:

The base station sends, by using the physical downlink control channel, the first radio resource allocation signaling that carries the first UE identifier information to the first UE, and sends the second radio resource allocation signaling that carries the second UE identifier information to the second UE; or ,

The base station sends, by using the physical downlink control channel, the third radio resource allocation signaling that carries the first UE identity information and the radio resource scheduling identifier to the first UE; or

The base station sends, by using the physical downlink control channel, fourth radio resource allocation signaling that carries the second UE identity information and the radio resource scheduling identifier to the second UE.

5. The method according to claim 1, wherein the base station allocates a radio resource node After being sent to the first UE and/or the second UE, the method further includes:

Receiving, by the base station, a data receiving result that is returned by the second UE after receiving data of the radio resource allocated by the first UE, and determining whether the data is retransmitted between the first UE and the second UE according to the received data receiving result. The allocated wireless resources are reserved.

The method according to claim 5, wherein the receiving, by the base station, the data receiving result that is returned after the second UE receives the data transmitted by the first UE using the radio resource allocated by the base station, specifically includes:

Receiving, by the base station, data receiving feedback signaling that the second UE sends the successful ACK/failed NACK information by using the time-frequency set in the physical uplink control channel; or

The base station receives the data receiving feedback signaling that the second UE carries the successful ACK/failed NACK information sent by the guard band between the frequency division duplex and the time division duplex in the physical uplink control channel.

A method for implementing D2D data transmission in a cellular network, the method includes: transmitting, by a first user equipment, a data transmission request to a base station, where the first UE and the second

Device-to-device communication D2D connection has been established between UEs;

The method of claim 7, wherein the sending, by the first UE, a data transmission request to the base station includes:

The first UE sends the buffer status report control signaling to the base station through the physical uplink shared channel.

The method according to claim 7, wherein the receiving, by the first UE and the second UE, the radio resource allocation result returned by the base station, specifically:

The first UE blindly detects the first radio resource allocation signaling that carries the self-identification information, and the second UE blindly detects the second radio resource allocation signaling that carries the self-identification information; or

The first UE blindly detects the fourth radio resource allocation signaling that carries the second UE identifier information and the radio resource scheduling identifier. The first UE and the second UE obtain the peer end identifier when establishing the D2D connection. Interest; or,

The second UE blindly detects the third radio resource allocation signaling that carries the first UE identification information and the radio resource scheduling identifier.

The method according to claim 7, wherein the first UE transmits data to the second UE by using the radio resource allocated by the base station, and the second UE receives the data transmitted by the first UE by using the radio resource allocated by the base station, Specifically include:

The first UE transmits data to the second UE according to the radio resource allocated by the base station by using the physical uplink shared channel, and the second UE receives the data transmitted by the first UE according to the radio resource allocated by the base station by using the physical uplink shared channel.

The method according to claim 7, wherein, after the second UE receives the data transmitted by the first UE by using the radio resource allocated by the base station, the method further includes:

Returning, by the second UE, the data receiving result to the first UE and the base station, where the method includes: sending, by the second UE, the data receiving feedback signaling that carries the successful ACK/failed NACK information to the base station by using the time frequency set in the physical uplink control channel; or The two UEs send data reception feedback signaling carrying the successful ACK/failed NACK information to the base station through the guard band between the frequency division duplex and the time division duplex in the physical uplink control channel.

The method of claim 11, wherein after the second UE returns the data receiving result to the first UE and the base station, the method further includes:

The first UE determines whether to retransmit the data to the second UE device according to the received data reception result.

A device for implementing D2D resource allocation in a cellular network, comprising: a first receiving unit, configured to receive a data transmission request sent by a first user equipment UE; wherein, the first UE and the second UE Device-to-device communication D2D connection has been established;

The first sending unit is configured to send the radio resource allocation result to the first UE and/or the second UE.

The device according to claim 13, wherein the first receiving unit is specific The method is: receiving, by the first UE, a buffer status report control signaling sent by using a physical uplink shared channel.

The device according to claim 13, wherein the resource allocation unit is specifically configured to:

Monitoring, by the first UE, a channel quality indication information of a channel between the first UE and the second UE that is sent by the first UE and the second UE by using a physical uplink control channel;

The device according to claim 13, wherein the first sending unit is specifically configured to:

And transmitting, by the physical downlink control channel, the first radio resource allocation signaling that carries the first UE identifier information to the first UE, and sending the second radio resource allocation signaling that carries the second UE identifier information to the second UE; or

Transmitting, by the physical downlink control channel, the third radio resource allocation signaling that carries the first UE identity information and the radio resource scheduling identifier to the first UE; or

And transmitting, by the physical downlink control channel, the fourth radio resource allocation signaling that carries the second UE identity information and the radio resource scheduling identifier to the second UE.

The apparatus according to claim 13, further comprising: a first determining unit, wherein the first receiving unit is further configured to receive, by the second UE, the radio resource transmission that is allocated by the first UE using the base station The data received after the data is received;

The first determining unit is configured to determine, according to the received data receiving result, whether the radio resource allocated for retransmission data is reserved between the first UE and the second UE, and indicate the resource according to the determined result. The allocation unit reserves the allocated radio resources.

The device according to claim 17, wherein the first receiving unit is specifically configured to:

Receiving, by the second UE, data reception feedback signaling that carries the successful ACK/failed NACK information that is sent by using the time-frequency set in the physical uplink control channel; or Receiving data reception feedback signaling that carries the successful ACK/failed NACK information sent by the second UE through the guard band between the frequency division duplex and the time division duplex in the physical uplink control channel.

A base station, comprising: means for implementing D2D resource allocation in a cellular network according to any of claims 13-18.

An apparatus for implementing D2D data transmission in a cellular network, comprising: a second sending unit, configured to send a data transmission request to a base station, where

a second receiving unit, configured to receive a radio resource allocation result returned by the base station according to the received data transmission request sent by the second sending unit, where the radio resource allocation result includes, by the base station, the first UE according to the received data transmission request a radio resource allocated for data transmission with the second UE;

And a data transmission unit, configured to transmit data to the second UE by using the radio resource allocated by the base station.

The device according to claim 20, wherein the second sending unit is configured to: send a buffer status report control signaling to the base station by using a physical uplink shared channel.

The device according to claim 20, wherein the second receiving unit is specifically configured to: blindly detect first radio resource allocation signaling that carries identification information of a first UE where the UE is located; or blindly detect And the fourth radio resource allocation signaling that carries the second UE identity information and the radio resource scheduling identifier, where the first UE and the second UE that are located in the UE obtain the peer identifier information when establishing the D2D connection.

The device according to claim 20, wherein the data transmission unit is configured to: transmit data to the second UE according to the radio resource allocated by the base station by using the physical uplink shared channel.

The apparatus according to claim 20, wherein the second receiving unit is further configured to: receive a data receiving result returned by the second UE after receiving the data transmitted by the data transmission unit.

The device according to claim 24, wherein the second receiving unit is configured to: receive a successful ACK/failure NACK message sent by the second UE by using a time frequency set in a physical uplink control channel. Data receiving feedback signaling; or Receiving data reception feedback signaling that carries the successful ACK/failed NACK information sent by the second UE through the guard band between the frequency division duplex and the time division duplex in the physical uplink control channel.

The device according to claim 25, further comprising: a second determining unit, configured to determine, according to the received data receiving result, whether to retransmit data to the second UE device, and indicate the location according to the determined result The data transmission unit transmits data.

An apparatus for implementing D2D data transmission in a cellular network, comprising: a third receiving unit, configured to receive a radio resource allocation result returned by the base station according to the received data transmission request sent by the first user equipment UE a device-to-device communication D2D connection is established between the second UE and the first UE; the radio resource allocation result includes the radio resource allocated by the base station for data transmission between the second UE and the first UE;

And a data receiving unit, configured to receive data transmitted by the first UE by using a radio resource allocated by the base station.

The device according to claim 27, wherein the third receiving unit is configured to: blindly detect, by using the second radio resource allocation signaling that carries the self-identification information; or

The third radio resource allocation signaling that carries the first UE identification information and the radio resource scheduling identifier is detected by the first UE and the second UE, and the first UE and the second UE obtain the peer identification information when establishing the D2D connection.

The apparatus according to claim 27, wherein the third receiving unit is configured to: receive, by using a physical uplink shared channel, data transmitted by the first UE according to the radio resource allocated by the base station.

The device according to claim 27, further comprising: a third sending unit, configured to return, to the first UE and the base station, a data receiving result after receiving the data transmitted by the first UE.

The device according to claim 30, wherein the third sending unit is specifically configured to:

Transmitting, by the time-frequency set in the physical uplink control channel, data reception feedback signaling carrying the successful ACK/failed NACK information to the base station; or transmitting, by the second UE, the guard band between the frequency division duplex and the time division duplex in the physical uplink control channel The data receiving feedback signaling carrying the successful ACK/failed NACK information is sent to the base station.

32. A user equipment, comprising: a bee according to any of claims 20-26 Apparatus for implementing D2D data transmission in a nest network and/or apparatus for implementing D2D data transmission in a cellular network as claimed in any of claims 27-31.

A communication system, comprising: at least one base station according to claim 19 and at least two user equipments;

The user equipment as the data transmission party includes at least the apparatus for implementing D2D data transmission in the cellular network according to any one of claims 20-26, and the user equipment as the data receiver includes at least the claims 27-31. Any of the devices for implementing D2D data transmission in a cellular network.