WO2014139351A1 - 一种d2d发现信号的传输方法和设备 - Google Patents

一种d2d发现信号的传输方法和设备 Download PDF

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Publication number
WO2014139351A1
WO2014139351A1 PCT/CN2014/072130 CN2014072130W WO2014139351A1 WO 2014139351 A1 WO2014139351 A1 WO 2014139351A1 CN 2014072130 W CN2014072130 W CN 2014072130W WO 2014139351 A1 WO2014139351 A1 WO 2014139351A1
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Prior art keywords
window
discovery signal
signal
physical resource
reception
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PCT/CN2014/072130
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English (en)
French (fr)
Inventor
陈文洪
高秋彬
彭莹
赵锐
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电信科学技术研究院
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Publication of WO2014139351A1 publication Critical patent/WO2014139351A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a D2D (Device to Device) discovery signal transmission method and device.
  • D2D Device to Device
  • Embodiments of the present invention provide a method and a device for transmitting a D2D discovery signal to improve resource utilization.
  • Bay' J In order to achieve the above objectives, Bay' J:
  • Embodiments of the present invention provide a device to device D2D discovery signal transmission method, including:
  • the base station device determines a physical resource occupied by the D2D discovery signal
  • the base station device Determining, by the base station device, a sending window corresponding to the D2D discovery signal by using the physical resource Port information, where the sending window information is an offset of a sending window of the D2D discovery signal with respect to a cellular signal window corresponding to the physical resource;
  • the base station device sends the physical resource and the sending window information to the first user equipment UE, and the first UE sends the D2D discovery signal by using the physical resource and the sending window information.
  • Embodiments of the present invention provide a device to device D2D discovery signal transmission method, including:
  • the first user equipment UE receives the physical resource occupied by the D2D discovery signal sent by the base station device and the sending window information corresponding to the D2D discovery signal; wherein the sending window information is a sending window of the D2D discovery signal relative to the physical The offset of the cellular signal window corresponding to the resource;
  • the first UE transmits a D2D discovery signal within a transmission window of the D2D discovery signal.
  • Embodiments of the present invention provide a device to device D2D discovery signal transmission method, including:
  • the second user equipment UE receives the physical resources occupied by the D2D discovery signal from the base station device;
  • a receiving window of the D2D discovery signal by using a cellular signal window corresponding to the physical resource; wherein, a receiving window of the D2D discovery signal is offset with respect to a cellular signal window corresponding to the physical resource, or
  • the receiving window of the D2D discovery signal includes a plurality of windows having a cellular signal window corresponding to the physical resource;
  • the second UE receives a D2D discovery signal on a receive window of the D2D discovery signal.
  • An embodiment of the present invention provides a base station device, including:
  • a determining module configured to determine a physical resource occupied by the device to the device D2D discovery signal, and use the physical resource to determine a sending window information corresponding to the D2D discovery signal, where the sending window information is a sending window of the D2D discovery signal relative to the physical The offset of the cellular signal window corresponding to the resource;
  • a sending module configured to send the physical resource and the sending window information to the first user equipment UE, where the first UE sends the D2D discovery signal by using the physical resource and the sending window information.
  • An embodiment of the present invention provides a user equipment, including:
  • a receiving module configured to receive a physical resource occupied by a D2D discovery signal from the base station device, and a sending window information corresponding to the D2D discovery signal, where the sending window information is a sending window of the D2D discovery signal, and a cell corresponding to the physical resource
  • a determining module configured to determine, by using the sending window information and a cellular signal window corresponding to the physical resource, a sending window of the D2D discovery signal
  • a sending module configured to send a D2D discovery signal in a sending window of the D2D discovery signal.
  • An embodiment of the present invention provides a user equipment, including:
  • a determining module configured to determine, by using a cellular signal window corresponding to the physical resource, a receiving window of the D2D discovery signal; wherein, a receiving window of the D2D discovery signal is offset with respect to a cellular signal window corresponding to the physical resource, or
  • the receiving window of the D2D discovery signal includes a plurality of signal receiving windows having a cellular signal window corresponding to the physical resource;
  • a second receiving module configured to receive D2D on a receiving window of the D2D discovery signal Discover the signal.
  • the embodiment of the present invention has at least the following advantages:
  • the timing window of the cellular signal timing window corresponding to the physical resource ie, the sending window and the receiving window
  • the D2D discovers the transmission window and the reception window of the signal, thereby effectively reducing the physical resources occupied by the transmission and reception conversion time and improving resource utilization.
  • FIG. 1 is a schematic diagram of operations such as voice and data between two UEs that need to interact with respective eNBs (ie, base station devices) and a core network;
  • eNBs ie, base station devices
  • core network ie, core network
  • FIG. 2 is a schematic diagram of direct transmission of data between voice and data between two UEs through a direct link without forwarding through a central node (ie, an eNB);
  • a central node ie, an eNB
  • Figure 3 is a schematic diagram of transmission and reception of a D2D discovery signal
  • FIG. 4 is a schematic flow chart of a method for transmitting a D2D discovery signal proposed in the embodiment of the present invention
  • FIG. 5 is a schematic diagram of transmission of a D2D discovery signal according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of transmission of another D2D discovery signal according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a base station device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • 10 is a schematic structural diagram of another base station device according to an embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of another user equipment according to an embodiment of the present invention.
  • FIG. 12 is another user equipment according to an embodiment of the present invention; Schematic diagram of the structure.
  • the short-distance communication characteristics and direct communication methods of D2D technology have the following advantages: (1) UE short-distance direct communication can achieve higher data rate, lower delay and lower power consumption; The short-distance characteristics of the distributed UE and D2D communication link can realize the effective utilization of spectrum resources; (3) The direct communication mode of D2D can meet the local data sharing requirements of services such as wireless P2P, and provide data with flexible adaptability Services; (4) D2D direct communication can expand the coverage of the network by utilizing a large number of widely distributed UEs in the network.
  • the D2D technology refers to the D2D communication process that is controlled by the LTE system and operates in the LTE licensed band.
  • the control of LTE system can overcome some problems of traditional D2D technology, such as uncontrollable interference.
  • the D2D communication process includes D2D discovery and D2D communication.
  • the UE discovers other UEs in its vicinity through the D2D discovery signal.
  • the UE performs data communication after establishing the D2D connection.
  • the resource used by the D2D discovery signal is notified by the base station device to the sending end UE and the receiving end UE, so that the transmitting end UE and the receiving end UE are in the network coverage.
  • the discovery can be performed by using the resources configured by the base station device, and the sender UE is referred to as the discovered UE, and the receiver UE is referred to as the discovery UE.
  • the UE is found to send a D2D discovery signal on the resource configured by the base station device, and the multiple discovery UEs can simultaneously receive the D2D discovery signal on the resource to discover the discovered UE.
  • the UE is found to receive D2D discovery signals of other UEs on other resources than the base station device configuration resources.
  • FIG. 3 is a schematic diagram of transmission and reception of a D2D discovery signal. It is found that the UE needs to transmit the D2D discovery signal on the OFDM (Orthogonal Frequency Division Multiplexing) symbol 5, and needs to receive the D2D discovery signals of other UEs on the OFDM symbols 3, 7, and 11.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the UE Due to the limitation of radio frequency, the UE needs a certain conversion time (20us) between transmitting the D2D discovery signal and receiving the D2D discovery signal. Therefore, when the UE is found to transmit the D2D discovery signal on the OFDM symbol 5, the OFDM symbol 4 and the OFDM symbol 6 on both sides of the OFDM symbol 5 cannot be used to receive the D2D discovery signal of other UEs, but only serve as a guard interval for transceiving and translating. Thereby reducing resource utilization.
  • the first embodiment of the present invention provides a method for transmitting a D2D discovery signal (ie, transmitting and receiving a D2D discovery signal).
  • a D2D discovery signal ie, transmitting and receiving a D2D discovery signal.
  • the transmission window and the reception window of the D2D discovery signal can be flexibly adjusted, thereby effectively reducing the occupation and reception time of the D2D discovery signal. Physical resources and improve resource utilization.
  • the method includes the following steps.
  • Step 401 The base station device determines a physical resource occupied by the D2D discovery signal.
  • the base station device determines that the physical resource occupied by the D2D discovery signal is the OFDM symbol 5.
  • Step 402 The base station device determines, by using the physical resource, the sending window information corresponding to the D2D discovery signal.
  • the sending window information is specifically a sending window of the D2D discovery signal.
  • the offset of the cellular signal window corresponding to the physical resource.
  • the offset may be a specific offset (such as 1/2 OFDM symbol, etc.).
  • the transmission window information is the offset of the transmission window of the D2D discovery signal with respect to the cellular signal window corresponding to the physical resource.
  • the offset can be a specific offset indication (eg, identification 0, 1, etc.).
  • the transmission window information is an offset indication of the transmission window of the D2D discovery signal with respect to the cellular signal window corresponding to the physical resource.
  • the offset indication may indicate whether there is an offset and indicates a predefined offset when there is an offset. For example, a predefined offset 1/2 OFDM symbol is indicated by an id of 0.
  • the transmission window information may be 1-bit transmission timing indication information.
  • the transmission window information is the first identifier (such as the identifier 0)
  • the offset of the transmission window indicating the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 0.
  • the transmission window information is the second identifier (such as the identifier 1)
  • the offset of the transmission window indicating the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 1/2 OFDM symbol.
  • the transmission window information may be 1-bit transmission timing indication information.
  • the transmission window information is the first identifier (such as the identifier 0)
  • the transmission window indicating the D2D discovery signal is not offset with respect to the cellular signal window corresponding to the physical resource.
  • the transmission window information is the second identifier (such as the identifier 1)
  • the transmission window indicating the D2D discovery signal is offset from the cellular signal window corresponding to the physical resource, and the offset value may be pre-agreed by the base station device and the UE.
  • the sending window information may also be 2-bit transmission timing indication information.
  • the transmission window information is the first identifier (such as the identifier 00)
  • the offset of the transmission window indicating the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 0.
  • the transmission window information is the second identifier (such as the identifier 01)
  • the offset of the transmission window indicating the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 1/3 OFDM symbol.
  • the transmission window information is the third identifier (such as the identifier 10)
  • the offset of the transmission window indicating the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 1/2 OFDM symbol.
  • the offset of the transmission window indicating the D2D discovery signal with respect to the cellular signal window corresponding to the physical resource is 2/3 OFDM symbol.
  • the determining, by the base station device, the sending window information corresponding to the D2D discovery signal by using the physical resource includes: receiving, by the base station device, the physical resource occupied by the D2D discovery signal and the D2D discovery signal on the other physical resource adjacent to the physical resource. In the case, the transmission window information corresponding to the D2D discovery signal is determined.
  • the base station device determines the sending window information corresponding to the D2D discovery signal according to the physical resource occupied by the D2D discovery signal or other D2D discovery signals on the other physical resources adjacent to the physical resource or the receiving and receiving of the cellular signal. That is, the base station device can determine the transmission window information corresponding to the D2D discovery signal according to the D2D discovery signal or the cellular signal transmission and reception condition of the first UE or the second UE on the physical resource.
  • the base station device determines that the offset of the transmission window of the D2D discovery signal relative to the cellular signal window corresponding to the physical resource (OFDM symbol 5) may be 0, that is, the transmission window of the D2D discovery signal does not shift.
  • the base station device may send the physical resource and the sending window information to the first UE by using the same message; or the base station device may separately send the physical resource and the sending window information to the first UE by using different messages. .
  • the base station device further needs to send the physical resource (such as OFDM symbol 5) occupied by the D2D discovery signal to the second UE, to instruct the second UE to perform the D2D discovery signal.
  • the physical resource such as OFDM symbol 5
  • the first UE is a discovered UE
  • the second UE is a discovery UE.
  • Step 404 The first UE receives the physical resource occupied by the D2D discovery signal from the base station device and the sending window information corresponding to the D2D discovery signal.
  • the sending window information is a cellular signal window corresponding to the physical window corresponding to the sending window of the D2D discovery signal.
  • the cellular signal window may be a transmission window of the cellular signal determined by the first UE by uplink synchronization with the cell; or, the cellular signal window may be a cellular signal determined by the first UE by downlink synchronization with the cell Receive window.
  • Step 405 The first UE determines a sending window of the D2D discovery signal by using the sending window information and the physical resource corresponding cellular signal window, and sends the D2D discovery signal in the sending window.
  • the transmission window information is the transmission timing indication information of 1 bit
  • the transmission window information is the first identifier (such as the identifier 0)
  • the offset of the transmission window relative to the cellular signal window corresponding to the physical resource is 0, that is, The first UE transmits a D2D discovery signal within a cellular signal window corresponding to the physical resource.
  • the transmission window information is the second identifier (such as the identifier 1)
  • the offset of the transmission window relative to the cellular signal window corresponding to the physical resource is 1/2 OFDM symbol, that is, the cellular signal window corresponding to the physical resource of the first UE
  • the D2D discovery signal is transmitted in the window after the left offset of 1/2 OFDM symbol.
  • the foregoing process is a process of the first UE, and further, for the process of the second UE, the method provided by the embodiment of the present invention may further include the following steps:
  • Step 406 The second UE receives the physical resource occupied by the D2D discovery signal from the base station device, determines a receiving window of the D2D discovery signal by using the cellular signal window corresponding to the physical resource, and receives the D2D discovery signal on the receiving window of the D2D discovery signal.
  • the receiving window of the D2D discovery signal is offset from the cellular signal window corresponding to the physical resource, or the receiving window of the D2D discovery signal includes a plurality of signal receiving windows having a cellular signal window corresponding to the physical resource.
  • the cellular signal window may be a receiving window of the cellular signal determined by the second UE by downlink synchronization with the cell, or a sending window of the cellular signal determined by the second UE by uplink synchronization with the cell.
  • the second UE detects the D2D discovery signal on the receiving window of the D2D discovery signal, including but not limited to the following manner: The second UE sequences the received D2D discovery signal in the receiving window of the D2D discovery signal. Related operations, and determining whether to discover the first UE and the actual arrival window of the D2D discovery signal based on the correlation value (ie, the sequence correlation operation result).
  • the second UE determines the receiving window of the D2D discovery signal by using the cellular signal window corresponding to the physical resource, including but not limited to the following manners:
  • the base station device determines, by using the physical resource, a sending window corresponding to the D2D discovery signal After the port information, determining, according to the sending window information corresponding to the D2D discovery signal, the receiving window information corresponding to the D2D discovery signal (the receiving window information is an offset of the receiving window of the D2D discovery signal relative to the cellular signal window corresponding to the physical resource), and The receiving window information is sent to the second UE. After receiving the receiving window information corresponding to the D2D discovery signal, the second UE determines the receiving window of the D2D discovery signal by using the receiving window information and the cellular signal window corresponding to the physical resource.
  • the base station device may send the physical resource and the receiving window information to the second UE by using the same message; or the base station device may separately send the physical resource and the receiving window information to the second UE by using different messages. .
  • the receiving window information may be 1-bit receiving timing indication information, and when the receiving window information is the first identifier (such as the identifier 0), indicating that the receiving window of the D2D discovery signal is relative to the cellular corresponding to the physical resource.
  • the offset of the signal window is 0.
  • the receiving window information is the second identifier (such as the identifier 1)
  • the offset of the receiving window of the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 1/2 OFDM symbol.
  • the reception window information may be 1-bit reception timing indication information.
  • the receiving window information is the first identifier (such as the identifier 0)
  • it indicates that the receiving window of the D2D discovery signal is not offset with respect to the cellular signal window corresponding to the physical resource.
  • the receiving window information is the second identifier (such as the identifier 1)
  • the receiving window of the D2D discovery signal is offset from the cellular signal window corresponding to the physical resource, and the offset value may be pre-agreed by the base station device and the UE.
  • the receiving window information may be 2-bit receiving timing indication information.
  • the receiving window information is the first identifier (such as the identifier 00)
  • the offset of the receiving window of the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 0.
  • the receiving window information is the second identifier (such as the identifier 01)
  • the offset of the receiving window of the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 1/3 OFDM symbol.
  • Receiving window When the port information is the third identifier (such as the identifier 10), the offset of the receiving window of the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 1/2 OFDM symbol.
  • the receiving window information is the fourth identifier (such as the identifier 11)
  • the offset of the receiving window indicating the D2D discovery signal relative to the cellular signal window corresponding to the physical resource is 2/3 OFDM symbol.
  • the receiving window information may be 2-bit receiving timing indication information, and when the receiving window information is the first identifier (such as the identifier 00), the receiving window of the D2D discovery signal is compared with the cellular signal window corresponding to the physical resource. There is no offset.
  • the receiving window information is the second identifier (such as the identifier 01), the third identifier (such as the identifier 10), and the fourth identifier (such as the identifier 11)
  • the receiving of the D2D discovery signal indicates that the cellular signal window corresponding to the physical resource exists. Offset, its offset value can be pre-agreed by the base station device and the UE.
  • the base station device may directly determine that the receiving window information corresponding to the D2D discovery signal is the same as the sending window information corresponding to the D2D discovery signal. For example, when the transmission window information is one-bit transmission timing indication information, and the reception window information is 1-bit reception timing indication information, if the transmission window information is the second identifier, the base station device determines that the reception window information is the second identifier, that is, the reception The offset of the window relative to the cellular signal window corresponding to the physical resource is 1/2 OFDM symbol. The second UE determines that the cellular signal window corresponding to the physical resource is shifted to the left by a window of 1/2 OFDM symbol as a receiving window of the D2D discovery signal.
  • the base station apparatus determines that the reception window information is the second identifier, that is, the reception window.
  • the offset of the cellular signal window corresponding to the physical resource is 1/3 OFDM symbol.
  • the second UE determines that the cellular signal window corresponding to the physical resource is shifted to the left by 1/3 OFDM symbol, and the window is the receiving window of the D2D discovery signal.
  • the timing error may also be considered, so that the second UE can accurately receive the first when receiving the D2D discovery signal in the receiving window corresponding to the D2D discovery signal.
  • the second UE determines that the receiving window of the D2D discovery signal is a cellular signal window corresponding to the physical resource, and a cellular signal window corresponding to a part of the physical resource adjacent to the physical resource; at this time, the receiving window of the D2D discovery signal includes A plurality of windows having a cellular signal window corresponding to the physical resource.
  • the second UE may directly determine the receiving window of the D2D discovery signal, including: an OFDM symbol (ie, a physical resource) where the D2D discovery signal is located, and a part of the time domain resource on both sides of the OFDM symbol (eg, 2/3 OFDM symbol or 1) /20FDM symbol or 1 OFDM symbol, etc.).
  • an OFDM symbol ie, a physical resource
  • a part of the time domain resource on both sides of the OFDM symbol eg, 2/3 OFDM symbol or 1) /20FDM symbol or 1 OFDM symbol, etc.
  • the second UE directly determines that the receiving window of the D2D discovery signal is a predetermined number of available receiving windows.
  • the available receive window may be: a time window of a cellular signal corresponding to an OFDM symbol (ie, a physical resource) where the D2D discovery signal is located, or the OFDM symbol time window is offset by 1/2 OFDM symbol, or the OFDM symbol time The window is offset by 2/3 OFDM symbols and the like.
  • the second UE may further determine an actual arrival window of the D2D discovery signal according to the receiving result of the D2D discovery signal (ie, the second UE will Detected D2D discovery signal
  • the window directly acts as the actual arrival window of the D2D discovery signal, and determines the receiving window of the next D2D discovery signal according to the actual arrival window of the D2D discovery signal (ie, the second UE directly directly takes the actual arrival window of the D2D discovery signal as the next time) Receiving a receiving window of the D2D discovery signal).
  • the receiving, by the second UE, the D2D discovery signal on the receiving window of the D2D discovery signal includes: when the receiving window of the D2D discovery signal is determined according to the cellular signal window corresponding to the physical resource and the predefined window offset value When the signals are received by the window, the second UE performs D2D discovery signal reception in the plurality of signal receiving windows to determine an actual arrival window of the D2D discovery signal.
  • the flexible adjustment of the transmission window and the reception window can effectively reduce the physical resources occupied by the transmission and reception conversion, and does not need to free the complete OFDM symbol as the protection interval for the transmission and reception conversion, thereby improving the protection interval.
  • Resource utilization For example: When only two OFDM symbols can be used for transmission, it can also support the transmission of D2D discovery signals of 1 OFDM symbol length.
  • the base station device may include a timing error caused by a different distance from the base station device in the indication information when indicating the transmission window and the reception window, thereby compensating the timing error.
  • the second embodiment of the present invention provides a method for transmitting a D2D discovery signal, and the transmission diagram of the D2D discovery signal shown in FIG. 5 is taken as an example for detailed description.
  • the base station device determines the physical resource occupied by the D2D discovery signal and the transmission window information corresponding to the D2D discovery signal. As shown in Figure 5, the D2D discovery signal occupies OFDM symbol 5, and the transmission window of the D2D discovery signal is advanced by half an OFDM symbol with respect to the cellular signal window.
  • the base station device notifies the first UE of the physical resource used by the D2D discovery signal and the transmission timing indication information for determining the transmission window.
  • the transmission timing indication The information is 1-bit information indicating that the transmission window of the D2D discovery signal is offset from the cellular signal window by 1/2 OFDM symbol (indicating state 1) or there is no offset (indicating state 0), and the transmission timing indication information is 1.
  • the base station device may also notify the second UE of the physical resource used for the D2D discovery signal together with the reception timing indication information for determining the reception window.
  • the reception timing indication information is 1-bit information indicating that the reception window of the D2D discovery signal is offset from the cellular signal window by 1/2 OFDM symbol (indicating state 1) or there is no offset (indicating state 0), and the transmission timing indication is The information is 1.
  • the first UE receives the physical resource and the transmission timing indication information of the base station device, determines the physical resource of the D2D discovery signal and the transmission window according to the transmission timing indication information (as shown in FIG. 5), and determines in itself.
  • the D2D discovery signal is sent within the send window.
  • a third embodiment of the present invention provides a method for transmitting a D2D discovery signal.
  • the transmission diagram of the D2D discovery signal shown in FIG. 6 is taken as an example for detailed description.
  • the base station device notifies the first UE of the physical resource used by the D2D discovery signal and the transmission timing indication information for determining the transmission window.
  • the transmission timing indication information is 2-bit information, and is used to indicate that the transmission window of the D2D discovery signal is offset from the cellular signal window by 2/3 OFDM symbols (indicating state 11), or offset 1/2 OFDM Symbol (indicating state 10), or offset 1/3 OFDM symbol (indicating state 01), or no offset (indicating state 00).
  • the sending timing indication information may be 11.
  • the base station device can also notify the second physical resource used by the D2D discovery signal to the second
  • the first UE receives the physical resource and the transmission timing indication information of the base station device, determines the physical resource of the D2D discovery signal and the transmission window according to the transmission timing indication information (as shown in FIG. 6), and determines in itself.
  • the D2D discovery signal is sent within the send window.
  • the second UE receives the physical resource indication information of the base station device, determines the physical resource of the D2D discovery signal according to the physical resource indication information, that is, the OFDM symbol 9; and determines the receiving window of the D2D discovery signal according to a predetermined rule.
  • the receiving window of the D2D discovery signal is a pre-agreed two available receiving windows.
  • the time window of the OFDM symbol 9 determined by the base station device synchronization, or the time window offset of the OFDM symbol 9 is 2/3 OFDM symbols, and the windows 2 and 1 are received as shown in FIG.
  • the D2D discovery signal is separately detected in the determined two available receiving windows, and in which receiving window the D2D discovery signal is determined by the sequence correlation, and the determined D2D discovery signal arrives at the window as the receiving window for receiving the D2D discovery signal next time.
  • the second UE detects that the D2D discovery signal is in the receiving window 1, and the subsequent receiving of the D2D discovery signal is performed in the receiving window 1.
  • an embodiment of the present invention further provides a base station device.
  • the device includes:
  • the determining module 11 is configured to determine a physical resource occupied by the device-to-device (D2D) discovery signal, and determine, by using the physical resource, a sending window information corresponding to the D2D discovery signal, where the sending window information is a sending window of the D2D discovery signal relative to An offset of a cellular signal window corresponding to the physical resource;
  • the sending module 12 is configured to send the physical resource and the sending window information to the first user equipment UE, where the first UE sends the D2D discovery signal by using the physical resource and the sending window information.
  • the determining module 11 is further configured to determine, according to the sending window information corresponding to the D2D discovery signal, the receiving window information corresponding to the D2D discovery signal, where the receiving window information is a receiving window of the D2D discovery signal corresponding to the physical resource. Offset of the cellular signal window; the sending module 12 is further configured to send the physical resource and the receiving window information to the second UE, where the second UE receives the D2D discovery signal by using the physical resource and the receiving window information .
  • the determining module 11 is specifically configured to determine, according to the physical resource occupied by the D2D discovery signal and the D2D discovery signal on the other physical resources adjacent to the physical resource, the sending window information corresponding to the D2D discovery signal.
  • the modules of the device of the present invention may be integrated into one or may be deployed separately.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • the embodiment of the present invention further provides a user equipment.
  • the device includes:
  • the receiving module 21 is configured to receive the physical resource occupied by the D2D discovery signal from the base station device and the sending window information corresponding to the D2D discovery signal, where the sending window information is a sending window of the D2D discovery signal corresponding to the physical resource. Offset of the cellular signal window;
  • a determining module 22 configured to determine, by using the sending window information and a cellular signal window corresponding to the physical resource, a sending window of the D2D discovery signal;
  • the sending module 23 is configured to send a D2D discovery signal in a sending window of the D2D discovery signal.
  • the modules of the device of the present invention may be integrated into one or may be deployed separately.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • the embodiment of the present invention further provides a user equipment.
  • the device includes:
  • a determining module 32 configured to determine, by using a cellular signal window corresponding to the physical resource, a receiving window of the D2D discovery signal; wherein, a receiving window of the D2D discovery signal is offset with respect to a cellular signal window corresponding to the physical resource, or
  • the receiving window of the D2D discovery signal includes a plurality of signal receiving windows having a cellular signal window corresponding to the physical resource;
  • the second receiving module 33 is configured to receive the D2D discovery signal on the receiving window of the D2D discovery signal.
  • the determining module 32 is specifically configured to receive the receiving window information corresponding to the D2D discovery signal sent by the base station device, where the receiving window information is a partial of a receiving window of the D2D discovery signal relative to a cellular signal window corresponding to the physical resource.
  • the second receiving module 33 is specifically configured to: when the receiving window of the D2D discovery signal is a plurality of signal receiving windows determined according to the cellular signal window corresponding to the physical resource and the predefined window offset value, respectively D2D discovery signal reception is performed in a plurality of signal receiving windows to determine an actual arrival window of the D2D discovery signal.
  • the determining module 32 is further configured to receive the D2D on the receiving window of the D2D discovery signal. After the signal is found, the reception window for receiving the D2D discovery signal next time is determined according to the actual arrival window of the D2D discovery signal.
  • the modules of the device of the present invention may be integrated into one or may be deployed separately.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • FIG. 10 is a schematic structural diagram of another base station device according to an embodiment of the present invention. As shown in FIG. 10, the base station device includes: a processor 41 and a memory 42.
  • the memory 42 is used to store the determination command 421 and the send command 422.
  • the processor 41 is in communication with the memory 42 and executes the determining command 421 and the transmitting command 422 for performing the operations of the determining module 11 and the transmitting module 12, respectively.
  • FIG. 11 is a schematic structural diagram of another user equipment according to an embodiment of the present invention. As shown in FIG. 11, the user equipment includes: a processor 51 and a memory 52.
  • the memory 52 is used to store the receive command 521, the determine command 522, and the send command 523.
  • the processor 51 is configured to communicate with the memory 52, and execute the receiving command 521, the determining command 522, and the sending command 523 for performing operations of the receiving module 21, the determining module 22, and the transmitting module 23, respectively.
  • FIG. 12 is a schematic structural diagram of another user equipment according to an embodiment of the present invention. As shown in FIG. 12, the user equipment includes: a processor 61 and a memory 62.
  • the memory 62 is used to store a first receive command 621, a determine command 622, and a second receive command 623.
  • the processor 61 is in communication with the memory 62, and executes the first receiving instruction 621, the determining instruction 622, and the second receiving instruction 623, respectively, for performing the foregoing first receiving module 31, determining module 32, and second receiving module 33. operating.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

Abstract

本发明公开了一种D2D发现信号的传输方法和设备，该方法包括：基站设备确定D2D发现信号占用的物理资源；所述基站设备利用所述物理资源确定D2D发现信号对应的发送窗口信息，所述发送窗口信息为D2D发现信号的发送窗口相对于所述物理资源对应的蜂窝信号窗口的偏移；所述基站设备将所述物理资源和发送窗口信息发送给第一UE，由所述第一UE利用所述物理资源和发送窗口信息发送D2D发现信号。

Description

一种 D2D发现信号的传输方法和设备
本申请要求于 2013 年 3 月 14 日提交中国专利局、 申请号为 201310081826.0、 发明名称为 "一种 D2D发现信号的传输方法和设备" 的中国专利申请的优先权， 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域，尤其是涉及一种 D2D( Device to Device, 设备到设备）发现信号的传输方法和设备。 背景技术
在传统的蜂窝通信技术中， 两个 UE ( User Equipment, 用户设备 ) 之间的数据通信流程可以如图 1所示， 即两个 UE之间的语音和数据等 业务需要经过各自驻留的 eNB (即基站设备）以及核心网进行交互。 D2D 技术（即终端直通技术 )是指邻近的 UE可以在近距离范围内， 通过直 连链路直接进行数据传输， 不需要通过中心节点 （即 eNB )进行转发。 如图 2所示， 图 2是两个 UE之间的语音和数据等业务通过直连链路直 接进行数据传输， 不需要通过中心节点 （即 eNB )进行转发的示意图。 发明内容
本发明实施例提供一种 D2D发现信号的传输方法和设备，以提高资 源利用率。 为了达到上述目的， 贝' J :
本发明实施例提供一种设备到设备 D2D发现信号的传输方法， 包 括：
基站设备确定 D2D发现信号占用的物理资源；
所述基站设备利用所述物理资源确定 D2D发现信号对应的发送窗 口信息，所述发送窗口信息为 D2D发现信号的发送窗口相对于所述物理 资源对应的蜂窝信号窗口的偏移；
所述基站设备将所述物理资源和发送窗口信息发送给第一用户设 备 UE, 由所述第一 UE利用所述物理资源和发送窗口信息发送 D2D发 现信号。
本发明实施例提供一种设备到设备 D2D发现信号的传输方法， 包 括：
第一用户设备 UE接收基站设备向第一 UE发送的 D2D发现信号占 用的物理资源和 D2D发现信号对应的发送窗口信息； 其中，所述发送窗 口信息为 D2D发现信号的发送窗口相对于所述物理资源对应的蜂窝信 号窗口的偏移；
所述第一 UE利用所述发送窗口信息以及所述物理资源对应的蜂窝 信号窗口确定 D2D发现信号的发送窗口；
所述第一 UE在所述 D2D发现信号的发送窗口内发送 D2D发现信 号。
本发明实施例提供一种设备到设备 D2D发现信号的传输方法， 包 括：
第二用户设备 UE接收来自基站设备的 D2D发现信号占用的物理资 源；
所述第二 UE利用所述物理资源对应的蜂窝信号窗口确定 D2D发现 信号的接收窗口；其中，所述 D2D发现信号的接收窗口相对于所述物理 资源对应的蜂窝信号窗口存在偏移，或者，所述 D2D发现信号的接收窗 口包含了具有所述物理资源对应的蜂窝信号窗口的多个窗口；
所述第二 UE在所述 D2D发现信号的接收窗口上接收 D2D发现信 号。 本发明实施例提供一种基站设备， 包括：
确定模块，用于确定设备到设备 D2D发现信号占用的物理资源，并 利用所述物理资源确定 D2D发现信号对应的发送窗口信息，所述发送窗 口信息为 D2D发现信号的发送窗口相对于所述物理资源对应的蜂窝信 号窗口的偏移；
发送模块， 用于将所述物理资源和发送窗口信息发送给第一用户设 备 UE, 由所述第一 UE利用所述物理资源和发送窗口信息发送 D2D发 现信号。
本发明实施例提供一种用户设备， 包括：
接收模块，用于接收来自基站设备的 D2D发现信号占用的物理资源 和 D2D发现信号对应的发送窗口信息；其中，所述发送窗口信息为 D2D 发现信号的发送窗口相对于所述物理资源对应的蜂窝信号窗口的偏移； 确定模块， 用于利用所述发送窗口信息以及所述物理资源对应的蜂 窝信号窗口确定 D2D发现信号的发送窗口；
发送模块， 用于在所述 D2D发现信号的发送窗口内发送 D2D发现 信号。
本发明实施例提供一种用户设备， 包括：
第一接收模块，用于接收来自基站设备的 D2D发现信号占用的物理 资源；
确定模块，用于利用所述物理资源对应的蜂窝信号窗口确定 D2D发 现信号的接收窗口；其中，所述 D2D发现信号的接收窗口相对于所述物 理资源对应的蜂窝信号窗口存在偏移，或者，所述 D2D发现信号的接收 窗口包含了具有所述物理资源对应的蜂窝信号窗口的多个信号接收窗 口；
第二接收模块， 用于在所述 D2D发现信号的接收窗口上接收 D2D 发现信号。
与现有技术相比， 本发明实施例至少具有以下优点： 本发明实施例 中， 通过采用与物理资源对应的蜂窝信号定时窗口 （即发送窗口和接收 窗口）独立的定时窗口，可以灵活的调整 D2D发现信号的发送窗口和接 收窗口， 从而可以有效的减少收发转换时间所占用的物理资源， 并提高 资源利用率。 附图说明
为了更加清楚地说明本发明的技术方案， 下面将对实施例描述中所 需要使用的附图作筒单地介绍， 显而易见地， 下面描述中的附图仅仅是 本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性 劳动的前提下， 还可以根据这些附图获得其它的附图。
图 1是两个 UE之间的语音和数据等业务需要经过各自驻留的 eNB (即基站设备） 以及核心网进行交互的示意图；
图 2是两个 UE之间的语音和数据等业务通过直连链路直接进行数 据传输， 不需要通过中心节点 （即 eNB )进行转发的示意图；
图 3是 D2D发现信号的发送和接收示意图；
图 4是本发明实施例中提出的 D2D发现信号的传输方法流程示意 图；
图 5是本发明实施例中提出的 D2D发现信号的传输示意图； 图 6是本发明实施例中提出的另外一种 D2D发现信号的传输示意 图；
图 7是本发明实施例中提出的基站设备的结构示意图；
图 8是本发明实施例中提出的用户设备的结构示意图；
图 9是本发明实施例中提出的另一种用户设备的结构示意图； 图 10为根据本发明实施例中另外一种基站设备的结构示意图; 图 11为根据本发明实施例中另外一种用户设备的结构示意图； 图 12为根据本发明实施例中另外一种用户设备的结构示意图。 具体实施方式 下面将结合本发明中的附图， 对本发明中的技术方案进行清楚、 完 整地描述， 显然， 所描述的实施例仅仅是本发明的一部分实施例， 而不 是全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有 做出创造性劳动前提下所获得的所有其它实施例， 都属于本发明保护的 范围。
D2D 技术本身的短距离通信特点和直接通信方式具有如下优势： ( 1 ) UE近距离直接通信可实现较高的数据速率、 较低的延迟和较低的 功耗； （2 )利用网络中广泛分布的 UE和 D2D通信链路的短距离特点， 可以实现频谱资源的有效利用； （3 ) D2D的直接通信方式能够满足如无 线 P2P等业务的本地数据共享需求， 并提供具有灵活适应能力的数据服 务； （4 ) D2D直接通信能够利用网络中数量庞大且分布广泛的 UE, 拓 展网络的覆盖范围。
在 LTE ( Long Term Evolution, 长期演进 ) 系统中， D2D技术是指 工作在 LTE授权频段上， 受 LTE系统控制的 D2D通信过程。 充分发挥 D2D技术的优势， 且 LTE系统的控制可以克服传统 D2D技术的一些问 题， 如干扰不可控等。
D2D通信过程包括 D2D发现和 D2D通信。 首先， UE通过 D2D发 现信号来发现其邻近的其它 UE; 其次， UE在建立 D2D连接后进行数 据通信。 其中， 在网络覆盖范围内， D2D发现信号所使用的资源是由基 站设备通知给发送端 UE和接收端 UE的， 使得发送端 UE和接收端 UE 能够使用基站设备配置的资源进行发现， 且发送端 UE称为被发现 UE, 接收端 UE称为发现 UE。
被发现 UE在基站设备配置的资源上发送 D2D发现信号，多个发现 UE可同时在该资源上接收该 D2D发现信号， 以发现该被发现 UE。 此 外， 被发现 UE可在基站设备配置资源外的其它资源上， 接收其它 UE 的 D2D发现信号。 如图 3所示， 图 3为 D2D发现信号的发送和接收示 意图。 被发现 UE 需要在 OFDM ( Orthogonal Frequency Division Multiplexing, 正交频分复用 )符号 5上发送 D2D发现信号， 并需要在 OFDM符号 3、 7、 11上接收其它 UE的 D2D发现信号。
由于射频的限制， UE在发送 D2D发现信号和接收 D2D发现信号 之间需要一定的转换时间 （20us )。 因此， 被发现 UE在 OFDM符号 5 上发送 D2D发现信号时， OFDM符号 5两侧的 OFDM符号 4和 OFDM 符号 6不能用于接收其它 UE的 D2D发现信号，而只能作为收发转换的 保护间隔， 从而降低了资源利用率。
针对上述问题，本发明实施例一提供一种 D2D发现信号的传输（即 D2D发现信号的发送和接收）方法。 通过采用与物理资源对应的蜂窝信 号定时窗口 （即发送窗口和接收窗口）相独立的定时窗口， 可以灵活的 调整 D2D发现信号的发送窗口和接收窗口，从而可以有效的减少收发转 换时间所占用的物理资源， 并提高资源利用率。 如图 4所示， 该方法包 括以下步骤。
步骤 401 , 基站设备确定 D2D发现信号占用的物理资源。
如： 基站设备确定 D2D发现信号占用的物理资源为 OFDM符号 5。 步骤 402,基站设备利用该物理资源确定 D2D发现信号对应的发送 窗口信息。
本发明实施例中，该发送窗口信息具体为 D2D发现信号的发送窗口 相对于物理资源对应的蜂窝信号窗口的偏移。
其中， 该偏移可以为具体的偏移量（如 1/2 OFDM符号等）。 此时， 发送窗口信息为 D2D发现信号的发送窗口相对于物理资源对应的蜂窝 信号窗口的偏移量。 或者， 该偏移可以为具体的偏移指示（如标识 0, 1 等）。 此时， 发送窗口信息为 D2D发现信号的发送窗口相对于物理资源 对应的蜂窝信号窗口的偏移指示。 该偏移指示可以指示是否存在偏移， 并在存在偏移时指示预定义的偏移量。 例如， 通过标识 0指示预定义的 偏移量 1/2 OFDM符号。
在一种优选实施方式中， 发送窗口信息可以为 1比特的发送定时指 示信息。 当发送窗口信息为第一标识（如标识 0 )时， 表示 D2D发现信 号的发送窗口相对于物理资源对应的蜂窝信号窗口的偏移为 0。 当发送 窗口信息为第二标识（如标识 1 )时， 表示 D2D发现信号的发送窗口相 对于物理资源对应的蜂窝信号窗口的偏移为 1/2 OFDM符号。 在本发明 实施例中， 发送窗口信息可以为 1比特的发送定时指示信息。 当发送窗 口信息为第一标识（如标识 0 )时， 表示 D2D发现信号的发送窗口相对 于物理资源对应的蜂窝信号窗口没有偏移。 当发送窗口信息为第二标识 (如标识 1 )时， 表示 D2D发现信号的发送窗口相对于物理资源对应的 蜂窝信号窗口存在偏移， 其偏移值可以由基站设备和 UE预先约定。 在 本发明实施例中， 发送窗口信息也可以为 2比特发送定时指示信息。 当 发送窗口信息为第一标识（如标识 00 ) 时， 表示 D2D发现信号的发送 窗口相对于物理资源对应的蜂窝信号窗口的偏移为 0。 当发送窗口信息 为第二标识（如标识 01 ) 时， 表示 D2D发现信号的发送窗口相对于物 理资源对应的蜂窝信号窗口的偏移为 1/3 OFDM符号。 当发送窗口信息 为第三标识（如标识 10 ) 时， 表示 D2D发现信号的发送窗口相对于物 理资源对应的蜂窝信号窗口的偏移为 1/2 OFDM符号。 当发送窗口信息 为第四标识（如标识 11 ) 时， 表示 D2D发现信号的发送窗口相对于物 理资源对应的蜂窝信号窗口的偏移为 2/3 OFDM符号。
在本发明实施例中， 发送窗口信息可以为 2比特的发送定时指示信 息。 当发送窗口信息为第一标识（如标识 00 ) 时， 表示 D2D发现信号 的发送窗口相对于物理资源对应的蜂窝信号窗口没有偏移。 当发送窗口 信息为第二标识（如标识 01 )、 第三标识（如标识 10 )和第四标识（如 标识 11 ) 时， 表示 D2D发现信号的发送窗口相对于物理资源对应的蜂 窝信号窗口存在偏移， 其偏移值可以由基站设备和 UE预先约定。
本发明实施例中，基站设备利用物理资源确定 D2D发现信号对应的 发送窗口信息具体包括:基站设备根据 D2D发现信号占用的物理资源以 及所述物理资源相邻的其它物理资源上的 D2D发现信号收发情况，确定 D2D发现信号对应的发送窗口信息。
具体的，基站设备根据 D2D发现信号占用的物理资源或者该物理资 源邻近的其它物理资源上的其它 D2D发现信号或者蜂窝信号的收发情 况， 确定 D2D发现信号对应的发送窗口信息。 即，基站设备可以根据第 一 UE或者第二 UE在物理资源上 D2D发现信号或者蜂窝信号收发情况， 确定 D2D发现信号对应的发送窗口信息。
例如， 当 D2D发现信号占用的物理资源为 OFDM符号 5, 且第一 UE需要在 OFDM符号 3和 6上接收其它 UE的 D2D发现信号时，则基 站设备确定 D2D发现信号的发送窗口相对于物理资源 （ OFDM符号 5 ) 对应的蜂窝信号窗口的偏移可以为 1/2 OFDM符号.当 D2D发现信号占 用的物理资源为 OFDM符号 5, 且第一 UE需要在 OFDM符号 3和 7 上接收其它 UE的 D2D发现信号时， 则基站设备确定 D2D发现信号的 发送窗口相对于物理资源 （OFDM符号 5 )对应的蜂窝信号窗口的偏移 可以为 0, 即 D2D发现信号的发送窗口未发生偏移。 步骤 403, 基站设备将物理资源和发送窗口信息发送给第一 UE。 本发明实施例中， 基站设备可以通过相同的消息将物理资源和发送 窗口信息一起发送给第一 UE; 或者， 基站设备还可以通过不同的消息 将物理资源和发送窗口信息分别发送给第一 UE。
本发明实施例中，基站设备还需要将 D2D发现信号占用的物理资源 (如 OFDM符号 5 )发送给第二 UE, 以指示第二 UE进行 D2D发现信 号的接收。
其中， 该第一 UE为被发现 UE, 该第二 UE为发现 UE。
步骤 404, 第一 UE接收来自基站设备的 D2D发现信号占用的物理 资源和 D2D发现信号对应的发送窗口信息.其中， 该发送窗口信息为 D2D发现信号的发送窗口相对于物理资源对应的蜂窝信号窗口的偏移， 且该蜂窝信号窗口可以是第一 UE通过与蜂窝小区上行同步确定的蜂窝 信号的发送窗口； 或者， 该蜂窝信号窗口可以是第一 UE通过与蜂窝小 区下行同步确定的蜂窝信号的接收窗口。
步骤 405, 第一 UE利用发送窗口信息和物理资源对应蜂窝信号窗 口确定 D2D发现信号的发送窗口， 并在该发送窗口内发送 D2D发现信 号。
例如， 当发送窗口信息为 1比特的发送定时指示信息时， 如果发送 窗口信息为第一标识（如标识 0 ), 则表示发送窗口相对于物理资源对应 的蜂窝信号窗口的偏移为 0, 即第一 UE在物理资源对应的蜂窝信号窗 口内发送 D2D发现信号。 如果发送窗口信息为第二标识（如标识 1 ), 则表示发送窗口相对于物理资源对应的蜂窝信号窗口的偏移为 1/2 OFDM符号， 即第一 UE在物理资源对应的蜂窝信号窗口向左偏移 1/2 OFDM符号后的窗口内发送 D2D发现信号。
当发送窗口信息为 2比特发送定时指示信息时， 如果发送窗口信息 为第一标识（如标识 00 ), 表示发送窗口相对于物理资源对应的蜂窝信 号窗口的偏移为 0, 即第一 UE在物理资源对应的蜂窝信号窗口内发送 D2D发现信号。 如果发送窗口信息为第二标识（如标识 01 ), 表示发送 窗口相对于物理资源对应的蜂窝信号窗口的偏移为 1/3 OFDM符号， 即 第一 UE在物理资源的对应蜂窝信号窗口向左偏移 1/3 OFDM符号后的 窗口内发送 D2D发现信号。
上述过程为第一 UE的处理过程， 进一步的， 针对第二 UE的处理 过程， 本发明实施例所提供的方法中， 还可以包括以下步骤：
步骤 406, 第二 UE接收来自基站设备的 D2D发现信号占用的物理 资源，利用该物理资源对应的蜂窝信号窗口确定 D2D发现信号的接收窗 口， 并在 D2D发现信号的接收窗口上接收 D2D发现信号。
其中，该 D2D发现信号的接收窗口相对于物理资源对应的蜂窝信号 窗口存在偏移，或者，该 D2D发现信号的接收窗口包含了具有该物理资 源对应的蜂窝信号窗口的多个信号接收窗口。
本发明实施例中， 该蜂窝信号窗口可以是第二 UE通过与蜂窝小区 下行同步确定的蜂窝信号的接收窗口， 或者是第二 UE通过与蜂窝小区 上行同步确定的蜂窝信号的发送窗口。
本发明实施例中，第二 UE在 D2D发现信号的接收窗口上检测 D2D 发现信号， 具体包括但不限于如下方式： 第二 UE在 D2D发现信号的接 收窗口内对接收到的 D2D发现信号进行序列相关操作， 并根据相关值 (即序列相关操作结果 )确定是否发现第一 UE, 以及 D2D发现信号的 实际到达窗口。
本发明实施例中， 第二 UE利用物理资源对应的蜂窝信号窗口确定 D2D发现信号的接收窗口， 具体包括但不限于如下方式：
方式一、基站设备在利用物理资源确定 D2D发现信号对应的发送窗 口信息之后， 根据 D2D发现信号对应的发送窗口信息确定 D2D发现信 号对应的接收窗口信息（该接收窗口信息为 D2D发现信号的接收窗口相 对于物理资源对应的蜂窝信号窗口的偏移）， 并将该接收窗口信息发送 给第二 UE。 第二 UE在收到 D2D发现信号对应的接收窗口信息之后， 利用该接收窗口信息和物理资源对应的蜂窝信号窗口确定 D2D发现信 号的接收窗口。
本发明实施例中， 基站设备可以通过相同的消息将物理资源和接收 窗口信息一起发送给第二 UE; 或者， 基站设备还可以通过不同的消息 将物理资源和接收窗口信息分别发送给第二 UE。
在一种优选实施方式中， 接收窗口信息可以为 1比特的接收定时指 示信息， 当接收窗口信息为第一标识（如标识 0 )时， 表示 D2D发现信 号的接收窗口相对于物理资源对应的蜂窝信号窗口的偏移为 0。 当接收 窗口信息为第二标识（如标识 1 )时， 表示 D2D发现信号的接收窗口相 对于物理资源对应的蜂窝信号窗口的偏移为 1/2 OFDM符号。
在本发明实施例中， 接收窗口信息可以为 1比特的接收定时指示信 息。 当接收窗口信息为第一标识（如标识 0 )时， 表示 D2D发现信号的 接收窗口相对于物理资源对应的蜂窝信号窗口没有偏移。 当接收窗口信 息为第二标识（如标识 1 )时， 表示 D2D发现信号的接收窗口相对于物 理资源对应的蜂窝信号窗口存在偏移， 其偏移值可以由基站设备和 UE 预先约定。
在本发明实施例中， 接收窗口信息可以为 2比特的接收定时指示信 息。 当接收窗口信息为第一标识（如标识 00 ) 时， 表示 D2D发现信号 的接收窗口相对于物理资源对应的蜂窝信号窗口的偏移为 0。 当接收窗 口信息为第二标识（如标识 01 ) 时， 表示 D2D发现信号的接收窗口相 对于物理资源对应的蜂窝信号窗口的偏移为 1/3 OFDM符号。 当接收窗 口信息为第三标识（如标识 10 ) 时， 表示 D2D发现信号的接收窗口相 对于物理资源对应的蜂窝信号窗口的偏移为 1/2 OFDM符号。 当接收窗 口信息为第四标识（如标识 11 ) 时， 表示 D2D发现信号的接收窗口相 对于物理资源对应的蜂窝信号窗口的偏移为 2/3 OFDM符号。
在本发明实施例中，接收窗口信息可以为 2比特接收定时指示信息， 当接收窗口信息为第一标识（如标识 00 ) 时， 表示 D2D发现信号的接 收窗口相对于物理资源对应的蜂窝信号窗口没有偏移。 当接收窗口信息 为第二标识 （如标识 01 )、 第三标识 （如标识 10 )和第四标识 （如标识 11 )时，表示于 D2D发现信号的接收窗口相对物理资源对应的蜂窝信号 窗口存在偏移， 其偏移值可以由基站设备和 UE预先约定。
本发明实施例中，基站设备可以直接确定 D2D发现信号对应的接收 窗口信息与 D2D发现信号对应的发送窗口信息相同。例如， 当发送窗口 信息为 1比特的发送定时指示信息， 接收窗口信息为 1比特接收定时指 示信息时， 如果发送窗口信息为第二标识， 则基站设备确定接收窗口信 息为第二标识， 即接收窗口相对于物理资源对应的蜂窝信号窗口的偏移 为 1/2 OFDM符号。 第二 UE确定物理资源对应的蜂窝信号窗口向左偏 移 1/2 OFDM符号后的窗口为 D2D发现信号的接收窗口。当发送窗口信 息为 2比特的发送定时指示信息， 接收窗口信息为 2比特的接收定时指 示信息时， 如果发送窗口信息为第二标识， 则基站设备确定接收窗口信 息为第二标识， 即接收窗口相对于物理资源对应的蜂窝信号窗口的偏移 为 1/3 OFDM符号。 第二 UE确定物理资源对应的蜂窝信号窗口向左偏 移 1/3 OFDM符号后的窗口为 D2D发现信号的接收窗口。
如果第二 UE和第一 UE都按照与基站设备同步的方式进行定时， 则由于第二 UE与基站设备的距离以及被发现与基站设备距离不同， 因 此会导致第一 UE发送 D2D发现信号与第二 UE接收 D2D发现信号之 间存在一定的定时误差。 基于此， 本发明实施例中， 基站设备在利用
D2D发现信号对应的发送窗口信息确定 D2D发现信号对应的接收窗口 信息时， 还可以考虑该定时误差， 使得第二 UE在 D2D发现信号对应的 接收窗口接收 D2D发现信号时， 能够准确接收到第一 UE在 D2D发现 信号对应的发送窗口内发送的 D2D发现信号。
方式二、第二 UE确定 D2D发现信号的接收窗口为物理资源对应的 蜂窝信号窗口， 以及与该物理资源相邻的部分物理资源对应的蜂窝信号 窗口；此时，该 D2D发现信号的接收窗口包含了具有该物理资源对应的 蜂窝信号窗口的多个窗口。
具体的， 第二 UE可以直接确定 D2D发现信号的接收窗口包括： D2D发现信号所在的 OFDM符号 （即物理资源） 以及该 OFDM符号两 侧的一部分时域资源（如： 2/3 OFDM符号或者 1/20FDM符号或者 1个 OFDM符号等）。
方式三、第二 UE确定 D2D发现信号的接收窗口为根据物理资源对 应的蜂窝信号窗口以及预定义的窗口偏移值确定的多个信号接收窗口。 此时， D2D发现信号的接收窗口包含具有该物理资源对应的蜂窝信号窗 口的多个窗口。
具体的，第二 UE直接确定 D2D发现信号的接收窗口是预先约定的 若干个可用接收窗口。 例如， 该可用接收窗口可以是： D2D发现信号所 在的 OFDM符号（即物理资源）对应的蜂窝信号时间窗，或者，该 OFDM 符号时间窗偏移 1/2个 OFDM符号， 或者， 该 OFDM符号时间窗偏移 2/3个 OFDM符号等。
本发明实施例中，第二 UE在 D2D发现信号的接收窗口上接收 D2D 发现信号之后， 该第二 UE还可以根据 D2D发现信号的接收结果确定 D2D发现信号的实际到达窗口 （即第二 UE将检测到 D2D发现信号的 窗口直接作为 D2D发现信号的实际到达窗口），并根据该 D2D发现信号 的实际到达窗口确定下一次接收 D2D发现信号的接收窗口 （即第二 UE 直接将 D2D发现信号的实际到达窗口直接作为下一次接收该 D2D发现 信号的接收窗口）。
本发明实施例中，第二 UE在 D2D发现信号的接收窗口上接收 D2D 发现信号包括：当 D2D发现信号的接收窗口为根据物理资源对应的蜂窝 信号窗口以及预定义的窗口偏移值确定的多个信号接收窗口时， 第二 UE分别在所述多个信号接收窗口中进行 D2D发现信号接收， 以确定 D2D发现信号的实际到达窗口。
综上所述，本发明实施例中，通过发送窗口和接收窗口的灵活调整， 可以有效减少收发转换所占用的物理资源， 不需要为收发转换空出完整 的 OFDM符号作为保护间隔， 从而提高了资源利用率。 例如： 只有两个 OFDM符号可以用于发送时， 也能支持 1个 OFDM符号长度的 D2D发 现信号的发送。进一步的，基站设备可以在指示发送窗口和接收窗口时， 将由于和基站设备距离不同导致的定时误差包含在指示信息中， 从而弥 补该定时误差。
以下结合具体的应用场景对本发明实施例进行详细说明。
本发明实施例二提供一种 D2D发现信号的传输方法，以图 5所示的 D2D发现信号的传输示意图为例进行详细说明。
针对步骤 401和步骤 402,基站设备确定 D2D发现信号所占用的物 理资源以及 D2D发现信号对应的发送窗口信息。 如图 5所示， D2D发 现信号占用 OFDM符号 5, 且 D2D发现信号的发送窗口相对于蜂窝信 号窗口提前半个 OFDM符号。
针对步骤 403,基站设备将 D2D发现信号所用的物理资源和用于确 定发送窗口的发送定时指示信息一起通知给第一 UE。 该发送定时指示 信息为 1比特信息，指示 D2D发现信号的发送窗口相对于蜂窝信号窗口 偏移 1/2 OFDM符号 （指示状态 1 )或不存在偏移 （指示状态 0 ) , 此时 发送定时指示信息为 1。
此外，基站设备还可以将 D2D发现信号所用的物理资源和用于确定 接收窗口的接收定时指示信息一起通知给第二 UE。 该接收定时指示信 息为 1比特信息，指示 D2D发现信号的接收窗口相对于蜂窝信号窗口偏 移 1/2 OFDM符号 （指示状态 1 )或不存在偏移 （指示状态 0 ) , 此时发 送定时指示信息为 1。
针对步骤 404和步骤 405 , 第一 UE接收基站设备的物理资源和发 送定时指示信息，根据发送定时指示信息确定 D2D发现信号的物理资源 和发送窗口 （如图 5所示位置）， 并在自身确定的发送窗口内发送 D2D 发现信号。
针对步骤 406, 第二 UE接收基站设备的物理资源和接收定时指示 信息，根据该接收定时指示信息确定 D2D发现信号的物理资源和接收窗 口 （如图 5所示位置）， 并在自身确定的接收窗口内接收发现信号。
本发明实施例三提供一种 D2D发现信号的传输方法，以图 6所示的 D2D发现信号的传输示意图为例进行详细说明。
针对步骤 401和步骤 402,基站设备确定 D2D发现信号占用的物理 资源以及 D2D发现信号对应的发送窗口信息。 如图 6所示， D2D发现 信号占用 OFDM符号 9, 且 D2D发现信号的发送窗口相对于蜂窝信号 窗口提前 2/3个 OFDM符号。
针对步骤 403,基站设备将 D2D发现信号所使用的物理资源和用于 确定发送窗口的发送定时指示信息一起通知给第一 UE。 该发送定时指 示信息为 2比特信息，并用于指示 D2D发现信号的发送窗口相对于蜂窝 信号窗口偏移 2/3 OFDM符号 （指示状态 11 )、 或者， 偏移 1/2 OFDM 符号（指示状态 10 )、或者，偏移 1/3 OFDM符号（指示状态 01 )、或者， 不存在偏移 （指示状态 00 )。 在图 6所示的应用场景下， 该发送定时指 示信息可以为 11。
此外，基站设备还可以将 D2D发现信号所用的物理资源通知给第二
UE。
针对步骤 404和步骤 405 , 第一 UE接收基站设备的物理资源和发 送定时指示信息，根据发送定时指示信息确定 D2D发现信号的物理资源 和发送窗口 （如图 6所示位置）， 并在自身确定的发送窗口内发送 D2D 发现信号。
针对步骤 406, 第二 UE接收基站设备的物理资源指示信息， 根据 该物理资源指示信息确定 D2D发现信号的物理资源， 即 OFDM符号 9; 根据预定的规则确定 D2D发现信号的接收窗口。 该 D2D发现信号的接 收窗口是预先约定的两个可用接收窗口。 通过基站设备同步确定的 OFDM符号 9的时间窗，或者 OFDM符号 9的时间窗偏移 2/3个 OFDM 符号， 如图 6所示接收窗口 2和 1。 在确定的两个可用接收窗口内分别 检测 D2D发现信号， 通过序列相关确定 D2D发现信号在哪个接收窗口 中， 并将所确定的 D2D发现信号到达窗口作为下一次接收该 D2D发现 信号的接收窗口。 如图 6所示， 第二 UE检测到 D2D发现信号在接收窗 口 1中， 后续接收该 D2D发现信号都在接收窗口 1中进行。
基于与上述方法同样的发明构思， 本发明实施例中还提供了一种基 站设备， 如图 7所示， 该设备包括：
确定模块 11 , 用于确定设备到设备（D2D )发现信号占用的物理资 源，并利用所述物理资源确定 D2D发现信号对应的发送窗口信息，所述 发送窗口信息为 D2D发现信号的发送窗口相对于所述物理资源对应的 蜂窝信号窗口的偏移； 发送模块 12,用于将所述物理资源和发送窗口信息发送给第一用户 设备 UE, 由所述第一 UE利用所述物理资源和发送窗口信息发送 D2D 发现信号。
所述确定模块 11 , 还用于根据所述 D2D发现信号对应的发送窗口 信息确定 D2D发现信号对应的接收窗口信息，所述接收窗口信息为 D2D 发现信号的接收窗口相对于所述物理资源对应的蜂窝信号窗口的偏移； 所述发送模块 12,还用于将所述物理资源和接收窗口信息发送给第 二 UE, 由所述第二 UE利用所述物理资源和接收窗口信息接收 D2D发 现信号。
所述确定模块 11 , 具体用于根据 D2D发现信号占用的物理资源以 及所述物理资源相邻的其它物理资源上的 D2D发现信号收发情况，确定 D2D发现信号对应的发送窗口信息。
其中， 本发明装置的各个模块可以集成于一体， 也可以分离部署。 上述模块可以合并为一个模块， 也可以进一步拆分成多个子模块。
基于与上述方法同样的发明构思， 本发明实施例中还提供了一种用 户设备， 如图 8所示， 该设备包括：
接收模块 21 , 用于接收来自基站设备的 D2D发现信号占用的物理 资源和 D2D发现信号对应的发送窗口信息；其中，所述发送窗口信息为 D2D发现信号的发送窗口相对于所述物理资源对应的蜂窝信号窗口的 偏移；
确定模块 22,用于利用所述发送窗口信息以及所述物理资源对应的 蜂窝信号窗口确定 D2D发现信号的发送窗口；
发送模块 23 , 用于在所述 D2D发现信号的发送窗口内发送 D2D发 现信号。
其中， 本发明装置的各个模块可以集成于一体， 也可以分离部署。 上述模块可以合并为一个模块， 也可以进一步拆分成多个子模块。
基于与上述方法同样的发明构思， 本发明实施例中还提供了一种用 户设备， 如图 9所示， 该设备包括：
第一接收模块 31 , 用于接收来自基站设备的 D2D发现信号占用的 物理资源；
确定模块 32,用于利用所述物理资源对应的蜂窝信号窗口确定 D2D 发现信号的接收窗口； 其中，所述 D2D发现信号的接收窗口相对于所述 物理资源对应的蜂窝信号窗口存在偏移，或者，所述 D2D发现信号的接 收窗口包含了具有所述物理资源对应的蜂窝信号窗口的多个信号接收 窗口；
第二接收模块 33 ,用于在所述 D2D发现信号的接收窗口上接收 D2D 发现信号。
所述确定模块 32, 具体用于接收所述基站设备发送的 D2D发现信 号对应的接收窗口信息，所述接收窗口信息为 D2D发现信号的接收窗口 相对于所述物理资源对应的蜂窝信号窗口的偏移； 以及， 利用所述接收 窗口信息和所述物理资源对应的蜂窝信号窗口确定 D2D发现信号的接 收窗口； 或者，确定 D2D发现信号的接收窗口为所述物理资源对应的蜂 窝信号窗口， 以及， 与所述物理资源相邻的部分物理资源对应的蜂窝信 号窗口； 或者，确定 D2D发现信号的接收窗口为根据所述物理资源对应 的蜂窝信号窗口以及预定义的窗口偏移值确定的多个信号接收窗口。
所述第二接收模块 33, 具体用于当 D2D发现信号的接收窗口为根 据所述物理资源对应的蜂窝信号窗口以及预定义的窗口偏移值确定的 多个信号接收窗口时，分别在所述多个信号接收窗口中进行 D2D发现信 号接收， 以确定 D2D发现信号的实际到达窗口。
所述确定模块 32, 还用于在 D2D发现信号的接收窗口上接收 D2D 发现信号后， 根据 D2D发现信号的实际到达窗口确定下一次接收 D2D 发现信号的接收窗口。
其中， 本发明装置的各个模块可以集成于一体， 也可以分离部署。 上述模块可以合并为一个模块， 也可以进一步拆分成多个子模块。
图 10为根据本发明实施例中另外一种基站设备的结构示意图。 如图 10所示， 该基站设备包括： 处理器 41和内存 42。
该内存 42用于存储确定指令 421和发送指令 422。
该处理器 41与该内存 42进行通信， 执行该确定指令 421和发送指 令 422, 分别用于执行上述确定模块 11和发送模块 12的操作。
图 11为根据本发明实施例中另外一种用户设备的结构示意图。 如图 11所示， 该用户设备包括： 处理器 51和内存 52。
该内存 52用于存储接收指令 521、 确定指令 522和发送指令 523。 该处理器 51用于与内存 52进行通信， 执行该接收指令 521、 确定 指令 522和发送指令 523 , 分别用于执行上述接收模块 21、 确定模块 22 和发送模块 23的操作。
图 12为根据本发明实施例中另外一种用户设备的结构示意图。 如图 12所示， 该用户设备包括： 处理器 61和内存 62。
该内存 62用于存储第一接收指令 621、确定指令 622和第二接收指 令 623。
该处理器 61与该内存 62进行通信， 执行该第一接收指令 621、 确 定指令 622和第二接收指令 623 , 分别用于执行上述第一接收模块 31、 确定模块 32和第二接收模块 33的操作。
通过以上的实施方式的描述， 本领域的技术人员可以清楚地了解到 本发明可借助软件加必需的通用硬件平台的方式来实现， 当然也可以通 过硬件， 但很多情况下前者是更佳的实施方式。 基于这样的理解， 本发 明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产 品的形式体现出来， 该计算机软件产品存储在一个存储介质中， 包括若 干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网 络设备等）执行本发明各个实施例所述的方法。
本领域技术人员可以理解附图只是一个优选实施例的示意图， 附图 中的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的装置中的模块可以按照实施 例描述进行分布于实施例的装置中， 也可以进行相应变化位于不同于本 实施例的一个或多个装置中。 上述实施例的模块可以合并为一个模块， 也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述， 不代表实施例的优劣。 以上公开的仅为本发明的几个具体实施例， 但是， 本发明并非局限 于此， 任何本领域的技术人员能思之的变化都应落入本发明的保护范 围。

Claims

权利要求书
1、一种设备到设备 D2D发现信号的传输方法， 其特征在于， 包括： 基站设备确定 D2D发现信号占用的物理资源；
所述基站设备利用所述物理资源确定 D2D发现信号对应的发送窗 口信息，所述发送窗口信息为所述 D2D发现信号的发送窗口相对于所述 物理资源对应的蜂窝信号窗口的偏移；
所述基站设备将所述物理资源和所述发送窗口信息发送给第一用 户设备 UE,由所述第一 UE利用所述物理资源和发送窗口信息发送所述 D2D发现信号。
2、 如权利要求 1 所述的方法， 其特征在于， 所述基站设备利用所 述物理资源确定 D2D发现信号对应的发送窗口信息之后，所述方法还包 括：
所述基站设备根据所述 D2D 发现信号对应的发送窗口信息确定 D2D发现信号对应的接收窗口信息， 所述接收窗口信息为 D2D发现信 号的接收窗口相对于所述物理资源对应的所述蜂窝信号窗口的偏移； 所述基站设备将所述物理资源和接收窗口信息发送给第二 UE, 由 所述第二 UE利用所述物理资源和接收窗口信息接收 D2D发现信号。
3、 如权利要求 1 所述的方法， 其特征在于， 所述基站设备利用所 述物理资源确定 D2D发现信号对应的发送窗口信息， 包括：
所述基站设备根据 D2D发现信号占用的物理资源以及所述物理资 源相邻的其它物理资源上的 D2D发现信号收发情况， 确定 D2D发现信 号对应的发送窗口信息。
4、一种设备到设备 D2D发现信号的传输方法， 其特征在于， 包括： 第一用户设备 UE接收基站设备向所述第一 UE发送的 D2D发现信 号占用的物理资源和 D2D发现信号对应的发送窗口信息；其中，所述发 送窗口信息为所述 D2D发现信号的发送窗口相对于所述物理资源对应 的蜂窝信号窗口的偏移；
所述第一 UE利用所述发送窗口信息以及所述物理资源对应的蜂窝 信号窗口确定 D2D发现信号的发送窗口；
所述第一 UE在所述 D2D发现信号的发送窗口内发送所述 D2D发 现信号。
5、一种设备到设备 D2D发现信号的传输方法， 其特征在于， 包括： 第二用户设备 UE接收来自基站设备的 D2D发现信号占用的物理资 源；
所述第二 UE利用所述物理资源对应的蜂窝信号窗口确定 D2D发现 信号的接收窗口；其中，所述 D2D发现信号的接收窗口相对于所述物理 资源对应的蜂窝信号窗口存在偏移，或者，所述 D2D发现信号的接收窗 口包含了具有所述物理资源对应的蜂窝信号窗口的多个信号接收窗口； 所述第二 UE在所述 D2D发现信号的接收窗口上接收 D2D发现信 号。
6、 如权利要求 5所述的方法， 其特征在于， 所述第二 UE利用所述 物理资源对应的蜂窝信号窗口确定 D2D发现信号的接收窗口， 包括： 所述第二 UE接收所述基站设备向所述第二 UE发送的 D2D发现信 号对应的接收窗口信息，所述接收窗口信息为 D2D发现信号的接收窗口 相对于所述物理资源对应的蜂窝信号窗口的偏移； 利用所述接收窗口信 息和所述物理资源对应的蜂窝信号窗口确定 D2D发现信号的接收窗口； 或者，
所述第二 UE确定 D2D发现信号的接收窗口为所述物理资源对应的 蜂窝信号窗口， 以及， 与所述物理资源相邻的部分物理资源对应的蜂窝 信号窗口； 或者，
所述第二 UE确定 D2D发现信号的接收窗口为根据所述物理资源对 应的蜂窝信号窗口以及预定义的窗口偏移值确定的多个信号接收窗口。
7、 如权利要求 6所述的方法， 其特征在于， 所述第二 UE在所述 D2D发现信号的接收窗口上接收 D2D发现信号， 包括：
当 D2D发现信号的接收窗口为根据所述物理资源对应的蜂窝信号 窗口以及预定义的窗口偏移值确定的多个信号接收窗口时， 所述第二 UE 分别在所述多个信号接收窗口中进行 D2D发现信号接收， 以确定 D2D发现信号的实际到达窗口。
8、 如权利要求 5-7任一项所述的方法， 其特征在于， 所述第二 UE 在所述 D2D发现信号的接收窗口上接收 D2D发现信号之后， 所述方法 还包括：
所述第二 UE根据所述 D2D发现信号的实际到达窗口确定下一次接 收所述 D2D发现信号的接收窗口。
9、 一种基站设备， 其特征在于， 包括：
确定模块，用于确定设备到设备 D2D发现信号占用的物理资源，并 利用所述物理资源确定所述 D2D发现信号对应的发送窗口信息，所述发 送窗口信息为所述 D2D发现信号的发送窗口相对于所述物理资源对应 的蜂窝信号窗口的偏移；
发送模块， 用于将所述物理资源和发送窗口信息发送给第一用户设 备 UE, 由所述第一 UE利用所述物理资源和发送窗口信息发送 D2D发 现信号。
10、 如权利要求 9所述的基站设备， 其特征在于，
所述确定模块，还用于根据所述 D2D发现信号对应的发送窗口信息 确定所述 D2D发现信号对应的接收窗口信息，所述接收窗口信息为 D2D 发现信号的接收窗口相对于所述物理资源对应的蜂窝信号窗口的偏移； 所述发送模块， 还用于将所述物理资源和接收窗口信息发送给第二
UE, 由所述第二 UE利用所述物理资源和接收窗口信息接收 D2D发现 信号。
11、 如权利要求 9所述的基站设备， 其特征在于，
所述确定模块，具体用于根据所述 D2D发现信号占用的物理资源以 及所述物理资源相邻的其它物理资源上的 D2D发现信号收发情况，确定 D2D发现信号对应的发送窗口信息。
12、 一种用户设备， 其特征在于， 包括：
接收模块，用于接收来自基站设备的 D2D发现信号占用的物理资源 和 D2D发现信号对应的发送窗口信息； 其中，所述发送窗口信息为所述 D2D发现信号的发送窗口相对于所述物理资源对应的蜂窝信号窗口的 偏移；
确定模块， 用于利用所述发送窗口信息以及所述物理资源对应的蜂 窝信号窗口确定 D2D发现信号的发送窗口；
发送模块， 用于在所述 D2D发现信号的发送窗口内发送 D2D发现 信号。
13、 一种用户设备， 其特征在于， 包括：
第一接收模块，用于接收来自基站设备的 D2D发现信号占用的物理 资源；
确定模块，用于利用所述物理资源对应的蜂窝信号窗口确定 D2D发 现信号的接收窗口；其中，所述 D2D发现信号的接收窗口相对于所述物 理资源对应的蜂窝信号窗口存在偏移，或者，所述 D2D发现信号的接收 窗口包含了具有所述物理资源对应的蜂窝信号窗口的多个信号接收窗 口： 第二接收模块， 用于在所述 D2D发现信号的接收窗口上接收 D2D 发现信号。
14、 如权利要求 13所述的用户设备， 其特征在于，
所述确定模块，用于接收所述基站设备发送的 D2D发现信号对应的 接收窗口信息，所述接收窗口信息为 D2D发现信号的接收窗口相对于所 述物理资源对应的蜂窝信号窗口的偏移；， 利用所述接收窗口信息和所 述物理资源对应的蜂窝信号窗口确定 D2D发现信号的接收窗口； 或者， 确定所述 D2D发现信号的接收窗口为所述物理资源对应的蜂窝信 号窗口， 与所述物理资源相邻的部分物理资源对应的蜂窝信号窗口； 或 者，
确定所述 D2D发现信号的接收窗口为根据所述物理资源对应的蜂 窝信号窗口以及预定义的窗口偏移值确定的多个信号接收窗口。
15、 如权利要求 14所述的用户设备， 其特征在于，
所述第二接收模块，用于当 D2D发现信号的接收窗口为根据所述物 理资源对应的蜂窝信号窗口以及预定义的窗口偏移值确定的多个信号 接收窗口时， 分别在所述多个信号接收窗口中进行 D2D发现信号接收， 以确定 D2D发现信号的实际到达窗口。
16、 如权利要求 13-15任一项所述的用户设备， 其特征在于， 所述确定模块， 还用于在 D2D发现信号的接收窗口上接收 D2D发 现信号后，根据所述 D2D发现信号的实际到达窗口确定下一次接收 D2D 发现信号的接收窗口。
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