WO2014154080A1 - 一种发现d2d设备的方法、装置及系统 - Google Patents

一种发现d2d设备的方法、装置及系统 Download PDF

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Publication number
WO2014154080A1
WO2014154080A1 PCT/CN2014/072818 CN2014072818W WO2014154080A1 WO 2014154080 A1 WO2014154080 A1 WO 2014154080A1 CN 2014072818 W CN2014072818 W CN 2014072818W WO 2014154080 A1 WO2014154080 A1 WO 2014154080A1
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Prior art keywords
information
source
discovery
sends
identification
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PCT/CN2014/072818
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English (en)
French (fr)
Inventor
许辉
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP14773014.7A priority Critical patent/EP3051882B1/en
Priority to US15/026,913 priority patent/US20160302052A1/en
Publication of WO2014154080A1 publication Critical patent/WO2014154080A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, device, and system for discovering a D2D device. Background technique
  • D2D communication refers to direct communication between adjacent devices, such as Bluetooth.
  • D2D communication generally uses an unlicensed spectrum, such as 2.4 GHz.
  • D2D includes two aspects: discovery and communication. It is found that the D2D-capable user equipment that runs the D2D application is identified in the adjacent area, and the communication, that is, the D2D device, performs user plane data transmission through direct connection between users or through the eNB.
  • the usage scenarios of D2D technology include network coverage (such as commercial applications) and no network coverage (such as public safety communication).
  • the control plane implementation process of D2D is generally managed by the network side.
  • the control plane process is generally implemented by the D2D device itself.
  • current technology still does not provide a discovery method between D2D devices. Summary of the invention
  • an object of the present invention is to provide a method, device, and system for discovering a D2D device, which can realize discovery between D2D devices, reduce power consumption of the D2D device, and improve D2D discovery efficiency.
  • An embodiment of the present invention provides a method for discovering a D2D device, where the method includes:
  • the source D2D device determines whether there is currently network coverage, if yes, sends a request to discover the neighboring D2D device, and receives the radio resource information, and sends the announcement information according to the radio resource information and listens to the response information;
  • the source D2D device sends the announcement information according to the preset radio resource information and listens to the response information.
  • the determining whether the network coverage includes:
  • the source D2D device determines whether there is network coverage according to the signaling interaction with the network side and the network side context information that is already stored by the network. If the source D2D device and the network side have normal signaling interaction and have stored network side context information, Make sure there is network side coverage; otherwise, make sure there is no network coverage.
  • the request for discovering the neighboring D2D device includes at least one of the following information: a source identifier, a destination identifier, an application identifier, an application server identifier, a group identifier, a network coverage indication, a discovery range, and a discovery time window. .
  • the radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period, and a resource index.
  • the advertisement information includes at least one of the following: a source identifier, a destination identifier, an application identifier, a group identifier, whether there is a network coverage indication, whether a relay is supported, a discovery range, and a discovery time window.
  • the response information is: the receiving confirmation information sent by the target D2D device to the source D2D device after receiving the announcement information sent by the source D2D device; the response information is allocated or pre-assigned by the target D2D device. Send on the set radio resource.
  • the radio resource information, the announcement information, and the response information are sent by using radio resource control signaling.
  • An embodiment of the present invention further provides a method for discovering a D2D device, where the method includes:
  • the D2D gateway After receiving the request for discovering the neighboring D2D device, the D2D gateway sends the indication information to the evolved base station eNB through the mobility management entity MME;
  • the eNB allocates a radio resource to the D2D device according to the indication information, and sends the radio resource information.
  • the D2D gateway after receiving the request for the neighboring D2D device, the D2D gateway sends the indication information to the eNB through the MME, including:
  • the device sends a rejection indication message and a reason for rejection
  • the D2D gateway sends indication information to the source D2D device and the MME where the target device is located.
  • the indication information includes at least one of the following: a source identifier, a destination identifier, an application identifier, a group identifier, a network coverage indication, a discovery range, and a discovery time window.
  • An embodiment of the present invention further provides a D2D device, where the D2D device includes: an application unit and D2D unit; among them,
  • the application unit is configured to determine whether there is currently network coverage, and if yes, send a request for discovering the neighboring D2D device to the D2D unit, and send the announcement information and listen for the response information by using the D2D unit according to the wireless resource information; Sending, by the D2D unit, the announcement information and monitoring the response information according to the preset radio resource information;
  • the D2D unit is configured to send a request sent by the application unit to discover the neighboring D2D device; and send the received radio resource information to the application unit; and issue the announcement information and the interception response information sent by the application unit.
  • the application unit is configured to determine whether there is network coverage according to the signaling interaction with the network side and the existing network side context information, and if there is normal signaling interaction with the network side and the network side context information is saved, Then it is determined that there is network side coverage, otherwise, it is determined that there is no network coverage.
  • the request for discovering the neighboring D2D device includes at least one of the following information: a source identifier, a destination identifier, an application identifier, an application server identifier, a group identifier, a network coverage indication, a discovery range, and a discovery time window.
  • the radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period, and a resource index.
  • the advertisement information includes at least one of the following: a source identifier, a destination identifier, an application identifier, a group identifier, whether there is a network coverage indication, whether a relay is supported, a discovery range, and a discovery time window.
  • the response information is: the receiving confirmation information sent by the target D2D device to the source D2D device after receiving the announcement information sent by the source D2D device; the response information is allocated or pre-assigned by the target D2D device. Send on the set radio resource.
  • the radio resource information, the announcement information, and the response information are sent by using radio resource control signaling.
  • the embodiment of the present invention further provides a network side subsystem, where the network side subsystem includes: an eNB, an MME, and a D2D gateway;
  • the D2D gateway is configured to send a notification message to the MME after receiving the request to discover the neighboring D2D device.
  • the MME is configured to send the indication information sent by the D2D gateway to the eNB;
  • the eNB is configured to allocate a radio resource to the D2D device according to the indication information, and send the radio resource information.
  • the D2D gateway is configured to determine, according to the subscription data or the locally stored data, whether the source D2D device and the target D2D device in the request of the neighboring D2D device allow discovery or discovery, if not, The D2D gateway sends the reject indication information and the reject reason to the source D2D device; if yes, the D2D gateway sends the indication information to the source D2D device and the MME where the target device is located.
  • the indication information includes at least one of the following: a source identifier, a destination identifier, an application identifier, a group identifier, a network coverage indication, a discovery range, and a discovery time window.
  • the embodiment of the present invention provides a system for discovering a D2D device, the system comprising: the D2D device according to any one of the foregoing aspects; the network side subsystem according to any one of the foregoing aspects.
  • the method, device and system for discovering a D2D device determine whether there is current network coverage by the source D2D device, if yes, send a request for discovering a neighboring D2D device, and receive radio resource information according to the radio resource information. Send announcement information; if not, send announcement information according to preset wireless resource information. In this way, the discovery of the D2D device can be realized only by sending the announcement message according to the specified radio resource; the announcement of the announcement information and the continuous monitoring response information can be avoided, thereby reducing the power consumption of the D2D device; in addition, the purposeless cyclic transmission can be avoided. Announcement notifications and continuous monitoring responses to improve discovery efficiency between D2D devices.
  • FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic flowchart of a method according to Embodiment 3 of the present invention.
  • Embodiment 4 is a schematic flow chart of a method according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic flowchart of a method according to Embodiment 5 of the present invention.
  • FIG. 6 is a schematic structural diagram of a composition of a D2D device according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a system structure according to Embodiment 7 of the present invention.
  • the source D2D device determines whether there is currently network coverage, and if so, sends a request to discover a neighboring D2D device, and receives radio resource information, and sends announcement information according to the radio resource information; if not, The announcement information is sent according to the preset radio resource information.
  • the operation flow of the D2D device side in the method for discovering the D2D device provided by the embodiment of the present invention, as shown in FIG. 1, includes:
  • Step 101 The source D2D device determines whether there is currently network coverage. If yes, step 102 is performed; otherwise, step 104 is performed.
  • the determining whether there is network coverage includes: the source D2D device determines whether there is network coverage according to signaling interaction with the network side and context information in the device, if the source D2D device and the network side have normal signaling interaction and the device If there is context information on the network side, it is determined that there is network side coverage, otherwise, no network coverage is determined.
  • the network coverage is that all D2D devices (including the source and target D2D devices) participating in the D2D discovery are in network coverage; if one or more of the source and target D2D devices are not in the network coverage, the network is no network. cover.
  • the source D2D device is a device that has D2D discovery and communication capabilities and has contracted to use the D2D function.
  • Step 102 The source D2D device sends a request to discover a neighboring D2D device, and receives radio resource information.
  • the request for discovering the neighboring D2D device includes at least one of the following information: a source identifier, a destination identifier, an application identifier, an application server identifier, a group identifier, whether there is a network coverage indication, a discovery range, and a discovery time window.
  • the source identifier is used to indicate a D2D device that sends a request; the destination identifier is used to indicate The target device that is desired to be discovered; the discovery range is used to indicate an area where the target is found; and the discovery time window is used to indicate the effective time of the discovery.
  • the radio resource information is implemented by a radio resource control (RRC) message, and the radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period, and a resource index;
  • RRC radio resource control
  • the resource index is used to indicate a radio resource for different D2D discovery requirements, such as a point-to-point, a point-to-multipoint, and a different distance between devices; the radio resource uses an uplink radio resource, that is, a slave device. Air interface resources to the base station. The wireless resource is used for discovery between D2D devices.
  • the repetition period is: a time interval indicating that the D2D device sends/listens announcement information on the radio resource.
  • Step 103 The source D2D device sends the announcement information according to the wireless resource information and listens to the response information, and ends the processing flow.
  • the advertisement information includes at least one of the following: a source identifier (for indicating a D2D device that sends a request), a destination identifier (for indicating a target device that is desired to be discovered), an application identifier, a group identifier, and whether there is a network coverage indication. Whether to support relay (used to indicate that it can be used as a relay), discovery range (area for indicating the discovery target), discovery time window (used to indicate the effective time of discovery), and so on.
  • the D2D announcement information is sent through RRC signaling.
  • the response information is: receiving confirmation information sent by the neighboring D2D device to the source D2D device after receiving the announcement information sent by the source D2D device.
  • the response information is sent by the target D2D device on the allocated or preset radio resource.
  • the response information is sent through air interface RRC signaling.
  • Step 104 The source D2D device sends the announcement information according to the preset radio resource information and listens to the response information.
  • the preset radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period (a time interval for indicating that the D2D device sends/listens announcement information on the radio resource), and a resource index.
  • the preset radio resource is a D2D dedicated radio resource, and generally uses an uplink radio resource.
  • Embodiment 2 The operation flow of the network side in the method for discovering the D2D device provided by the embodiment of the present invention, as shown in FIG. 2, includes:
  • Step 201 After receiving the request for discovering the neighboring D2D device, the D2D gateway sends the indication information to the eNB by using a mobility management entity (MME, Mobility Management Entity).
  • MME Mobility Management Entity
  • the D2D gateway determines the proximity according to the subscription data or the locally stored data.
  • the D2D gateway sends a rejection indication information and a rejection reason to the source D2D device; if yes, the D2D gateway The indication information is sent to the source D2D device and the MME where the target device is located.
  • the source D2D device and the target D2D device may be located in the same or different MMEs; the D2D gateway determines the MME information of the D2D device according to the D2D device identifier and the D2D device registration information;
  • the MME sends the indication information to the eNB where the source D2D device and the target D2D device are located, where the source and destination D2D devices may be located in the same or different eNBs, and the MME determines, according to the D2D registration information, the eNB where the D2D is located. .
  • the indication information includes at least one of the following: a source identifier (for indicating a D2D device that sends a request), a destination identifier (for indicating a target device that is desired to be discovered), an application identifier, a group identifier, whether there is a network coverage indication, and a discovery range. (area used to indicate the discovery target), discovery time window (used to indicate the effective time of discovery), etc.
  • the discovery time window can be implemented using a timer.
  • Step 201 The eNB allocates a radio resource to the D2D device according to the indication information, and sends the radio resource information.
  • Embodiment 3
  • the method for discovering a D2D device includes:
  • Step 301 The source D2D device determines whether there is network coverage. If yes, step 302 is performed; otherwise, step 306 is performed.
  • the determining whether there is network coverage includes: the D2D device according to signaling with the network side The interaction determines whether there is network coverage. If the D2D device and the network side have normal signaling interaction, it is determined that there is network side coverage. Otherwise, it is determined that there is no network coverage.
  • the network coverage is that all D2D devices (including source and target D2D devices) participating in D2D discovery are in network coverage.
  • the D2D device is a device that has D2D discovery and communication capabilities and has contracted to use the D2D function.
  • Step 302 The source D2D device sends a request for discovering a neighboring D2D device to the D2D gateway.
  • the D2D gateway is a network control plane node deployed for implementing the D2D function, and may be a separate physical node or a logical node attached to other physical nodes, and the D2D gateway may be named according to requirements, such as D2D control function, D2D server, etc.
  • the D2D device sends the request discovery message to the D2D gateway through control plane signaling, where the control plane signaling is signaling dedicated to D2D discovery.
  • the neighboring D2D device is a D2D device of a neighboring area, wherein the neighboring area is an area that satisfies a predetermined rule, that is, a D2D device can be found in the area.
  • the neighboring D2D devices may be one or more, wherein a plurality of neighboring D2D devices generally belong to a common group, and a neighboring D2D device is generally: the same application running on the device as the D2D device that initiates the request, such as social, game, Applications such as entertainment, shopping, etc., or the user of the device and the D2D device user who initiated the request are friends.
  • the request for discovering the neighboring D2D device includes at least one of the following information: a source identifier, a destination identifier, an application identifier, an application server identifier, a group identifier, whether there is a network coverage indication, a discovery range, and a discovery time window.
  • the source identifier is used to indicate a D2D device that sends a request; the destination identifier is used to indicate a target device that is to be discovered; the discovery range is used to indicate an area where a target is found; and the discovery time window is used to indicate a discovery. Effective time.
  • the radio resource information is implemented by using RRC signaling, and the radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period, and a resource index;
  • the repetition period is: a time interval indicating that the D2D device sends/listens announcement information on the radio resource.
  • Step 303 The D2D gateway sends the indication information to the eNB through the MME. Specifically, the D2D gateway determines whether the source D2D device and the target D2D device have a discovery function according to the subscription data or the locally stored data, and whether the discovery or the discovery is allowed. If the determination is no, the D2D gateway sends the source D2D device to the source D2D device.
  • the D2D gateway sends an indication message to the source D2D device and the MME where the target device is located, where the source D2D device and the target D2D device may be located in the same or different ports; Determining, by the D2D gateway, the UI information of the D2D device according to the D2D device identifier and the D2D device registration information;
  • the eNB sends the indication information to the eNB where the source D2D device and the target D2D device are located, where the source and target D2D devices may be located in the same or different eNB, and the MME determines, according to the D2D registration information, the eNB where the D2D is located.
  • the indication information includes at least one of the following: a source identifier (for indicating a D2D device that sends a request), a destination identifier (for indicating a target device that is desired to be discovered), an application identifier, a group identifier, whether there is a network coverage indication, and a discovery range. (area used to indicate the discovery target), discovery time window (used to indicate the effective time of discovery), etc.
  • the discovery time window can be implemented using a timer.
  • Step 304 The eNB allocates a radio resource to the D2D device, encapsulates the radio resource into radio resource information, and separately sends the radio resource information to the source D2D device and the target D2D device.
  • the eNB may be: the source D2D device and the eNB where the target D2D device is located; the eNB may be one or more (such as multiple target D2D devices).
  • the radio resource adopts an uplink resource (UE to eNB), and may be dedicated or universal;
  • Step 305 The source D2D device sends advertisement information according to the radio resource information, and the target D2D device monitors the announcement according to the radio resource information. Information, end the process.
  • the source D2D device sends D2D announcement information through the radio resource, and the target D2D device listens to the D2D announcement information by using the radio resource;
  • the D2D advertisement information is used to indicate D2D discovery, and includes at least one of the following: a source identifier (for indicating a D2D device that sends a request), a destination identifier (for indicating a target device that is desired to be discovered), an application identifier, a group identifier, whether There is a network coverage indication, whether relay is supported (used to indicate that it can be used as a relay), The discovery range (used to indicate the area where the target was found), the time window (used to indicate the effective time of discovery), and so on.
  • the D2D announcement information is sent through RRC signaling.
  • the target D2D device monitors the announcement information on the radio resource, and if the D2D advertisement information is monitored, sends a response message to the source D2D device by using the radio resource, where the response message is used to indicate that the target D2D device receives the announcement information, and the response The message is sent through RRC signaling.
  • the source and destination D2D devices can further establish a wireless connection for D2D communication.
  • Step 306 The source D2D device sends the announcement information according to the preset radio resource.
  • the D2D device is not in the network coverage, and includes two situations: 1) the source and target D2D devices are not in the network coverage; 2) the source and target D2D devices have one party in the network coverage; the source and destination D2D devices are based on the pre- Set the radio resource to send and listen to D2D announcement information;
  • the preset refers to the radio resource information that has been stored in the D2D device before the D2D discovery, and the preset may be allocated by the network side when the D2D device is located in the network coverage, or configured by the D2D device manufacturer. In a D2D device.
  • the preset radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period (a time interval for indicating that the D2D device sends/listens announcement information on the radio resource), and a resource index (for indicating Different D2D discovery requirements for wireless resources, such as point-to-point, point-to-multipoint, and different distance between devices.
  • the target D2D device monitors the announcement information on the radio resource, and if the D2D advertisement information is monitored, sends a response message to the source D2D device by using the radio resource, where the response message is used to indicate that the target D2D device receives the announcement information, the announcement Information and response messages are sent via RRC signaling.
  • the further source and destination D2D devices establish a wireless connection for D2D communication.
  • Step 401 The source D2D device sends a request to the D2D gateway to discover the neighboring D2D device.
  • a direct interface exists between the source D2D device and the D2D gateway, and the D2D gateway belongs to a control plane node, and exists in both the visited network and the home network. If the source D2D device is in a roaming scenario, the D2D gateway accessing the network is visited. The request message is sent, otherwise the request message is sent through the D2D gateway of the home network.
  • the request for the neighboring D2D device is control plane signaling, and the request message includes at least one of the following: a source identifier, a target identifier, an application identifier, an application server identifier (indicating information indicating the server where the application is located), a group identifier, Whether there is a network coverage indication, a discovery range (used to indicate the area where the target is found), a time window (used to indicate the effective time of discovery), and the like. If the target is a specific D2D device, the target identifier is adopted. If the target is a group of D2D devices, the group identifier is adopted. If the target is a D2D device running a specific application, the application identifier is adopted.
  • Step 402 The D2D gateway determines whether to accept the discovery request, and if yes, proceeds to step 403; otherwise, proceeds to step 409.
  • the D2D gateway determines whether to accept the request according to the following conditions: whether the D2D device participating in the discovery has a D2D discovery function; whether D2D discovery/discovery is allowed; when the target D2D device is a group of D2D devices, the source D2D device and the target Whether the devices belong to the same group; when all of the above conditions are yes, the discovery request can be accepted; otherwise, the discovery request is rejected.
  • Step 403 The D2D gateway sends an accept response message to the source D2D device.
  • the D2D gateway sends an accept response message to the source D2D device through control plane signaling, the response message being sent within a time window specified by the discovery request message.
  • Step 404 The D2D gateway sends the indication information to the evolved base station (eNB, evolved NodeB) through the MME.
  • eNB evolved NodeB
  • the D2D gateway queries the MME and the eNB where the source/target D2D device is located according to the registration information of the D2D device, and the MME and the eNB may be one or more.
  • the indication information is used to indicate a discovery request, which is transmitted through control plane signaling.
  • Step 405 The eNB allocates radio resources and notifies the D2D device participating in the D2D discovery process.
  • the allocation may be dynamic allocation, static allocation or semi-static allocation, and dynamic allocation refers to Request type and network resource status, each time assigning different resources; Static allocation means that each time a fixed resource is allocated; Semi-static allocation means selecting a required resource within a certain resource range.
  • the radio resource adopts an uplink resource from the UE to the eNB.
  • the notification is transmitted through RRC signaling.
  • Step 406 The source D2D device sends the D2D announcement information according to the received radio resource information.
  • the D2D announcement information is transmitted through RRC signaling, and the D2D announcement information is repeatedly sent in a certain period to improve the reliability of the target D2D device receiving the announcement information.
  • the above D2D announcement period is determined by the eNB when allocating radio resources.
  • Step 407 The target D2D device monitors the D2D announcement information according to the received radio resource information.
  • the target D2D device monitors the D2D announcement message according to the announcement period on the allocated radio resource.
  • Step 408 The target D2D device that listens to the announcement information sends a response message to the source D2D device, and ends the processing flow.
  • the target D2D device listens to the D2D announcement information, the response message is sent by the allocated wireless resource; if the target D2D device is a group of devices, the target D2D device may send the response message partially or completely.
  • the response message is RRC signaling; the response message is sent within a discovery time window.
  • Step 409 The D2D gateway sends a reject message to the source D2D device.
  • the D2D gateway determines that the D2D discovery request is not supported, it sends a reject message to the source D2D device, and indicates the reason for the rejection, such as the target D2D device does not allow discovery, or the source D2D device and the target D2D device do not belong to the same group, and the like.
  • the reject message is transmitted through control signaling. If the accept or reject response message is not received within the discovery time window, the source D2D device considers the discovery request to be unsuccessful.
  • Step 501 The source D2D device sends the D2D announcement information according to the preset radio resource information.
  • the preset radio resource refers to a resource configuration signal that has been stored on the D2D device before the discovery.
  • the preset may be configured by the network side eNB when the D2D device is in network coverage, or the D2D device manufacturer according to the rules in advance. Configuration.
  • the preset radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period (a time interval for indicating that the D2D device sends/listens announcement information on the radio resource), and a resource index (for indicating Different D2D discovery requirements for wireless resources, such as point-to-point, point-to-multipoint, and different distance between devices.
  • Step 502 The target D2D device monitors D2D announcement information on a preset radio resource.
  • the target D2D device monitors D2D announcement information on the wireless resource according to a preset period.
  • Step 503 Listening to the target of the announcement information
  • the D2D device sends a response message to the source D2D device.
  • the response message is transmitted through an RRC message, and the response message is sent within a preset discovery time window. If no response message is received or rejected within the time window, the source D2D device considers the discovery request to be unsuccessful.
  • Embodiment 6 Embodiment 6
  • an embodiment of the present invention provides a D2D device, as shown in FIG. 6, including: an application unit 61 and a D2D unit 61;
  • the application unit 61 is configured to determine whether there is currently network coverage, and if yes, send a request for discovering the neighboring D2D device to the D2D unit 62, and send the announcement information and listen to the response information by using the D2D unit 62 according to the radio resource information; If not, sending the announcement information and listening to the response information through the D2D unit 62 according to the preset radio resource information;
  • the D2D unit 62 is configured to send a request sent by the application unit 61 to discover the neighboring D2D device; and send the received radio resource information to the application unit 61; and issue the announcement information sent by the application unit 61.
  • the application unit 61 is configured to perform interaction with the signaling on the network side and the existing network side context.
  • the information determines whether there is network coverage. If there is normal signaling interaction with the network side and the network side context information is already stored, it is determined that there is network side coverage. Otherwise, it is determined that there is no network coverage.
  • the request for discovering the neighboring D2D device includes at least one of the following information: a source identifier, a destination identifier, an application identifier, an application server identifier, a group identifier, a network coverage indication, a discovery range, and a discovery time window.
  • the source identifier is used to indicate a D2D device that sends a request; the destination identifier is used to indicate a target device that is to be discovered; the discovery range is used to indicate an area where a target is found; and the discovery time window is used to indicate a discovery. Effective time.
  • the radio resource information is implemented by radio resource control (RRC) signaling, and the radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period, and a resource index;
  • RRC radio resource control
  • the repetition period is: a time interval indicating that the D2D device sends/listens announcement information on the radio resource.
  • the D2D announcement information includes at least one of the following: a source identifier (for indicating a D2D device that sends a request), a destination identifier (for indicating a target device that is desired to be discovered), an application identifier, a group identifier, whether there is a network coverage indication, whether Support relay (used to indicate that it can be used as a relay), discovery range (area used to indicate the discovery target), discovery time window (used to indicate the effective time of discovery), and so on.
  • the D2D announcement information is sent through RRC signaling.
  • the preset radio resource information includes at least one of the following: a frequency, a frame/subframe, a repetition period (a time interval for indicating that the D2D device sends/listens announcement information on the radio resource), and a resource index (for indicating Different D2D discovery requirements for wireless resources, such as point-to-point, point-to-multipoint, and different distance between devices.
  • the response information is: the receiving confirmation information sent by the target D2D device to the source D2D device after receiving the announcement information sent by the source D2D device; the response information is allocated or preset by the target D2D device. Send on.
  • the radio resource information, the announcement information, and the response information are sent by radio resource control signaling.
  • Both the application unit 61 and the D2D unit 61 described above can be implemented by hardware such as a CPU or a DSP.
  • the embodiment of the present invention further provides a network side subsystem. As shown in FIG. 7, the network side includes: an eNB, an MME, and a D2D gateway;
  • the D2D gateway is configured to send a notification message to the MME after receiving the request to discover the neighboring D2D device.
  • the MME is configured to send the indication information sent by the D2D gateway to the eNB;
  • the eNB is configured to allocate a radio resource to the D2D device according to the indication information, and send the radio resource information.
  • the D2D gateway is configured to determine, according to the subscription data or the locally stored data, whether the source D2D device and the target D2D device in the request of the neighboring D2D device allow discovery or discovery, and if not, the D2D gateway The source D2D device sends the reject indication information and the reason for the rejection; if yes, the D2D gateway sends the indication information to the source D2D device and the MME where the target device is located.
  • the source D2D device and the target D2D device may be located in the same or different MMEs; the D2D gateway determines the MME information of the D2D device according to the D2D device identifier and the D2D device registration information;
  • the MME sends the indication information to the eNB where the source D2D device and the target D2D device are located, where the source and destination D2D devices may be located in the same or different eNBs, and the MME determines, according to the D2D registration information, the eNB where the D2D is located. .
  • the indication information includes at least one of the following: a source identifier (for indicating a D2D device that sends a request), a destination identifier (for indicating a target device that is desired to be discovered), an application identifier, a group identifier, whether there is a network coverage indication, and a discovery range. (area used to indicate the discovery target), discovery time window (used to indicate the effective time of discovery), etc.
  • the discovery time window can be implemented using a timer. Example VIII.
  • the system for discovering a D2D device includes: a source D2D device and a network side sub-system;
  • the source D2D device is configured to determine whether there is currently network coverage, and if so, to the network side subsystem
  • the system sends a request for discovering the neighboring D2D device, and receives the wireless resource information, and sends the announcement information according to the wireless resource information and monitors the response information; if not, the advertisement information is sent according to the preset wireless resource information and the response information is monitored;
  • the network side subsystem is configured to: after receiving the request from the source D2D device to discover the neighboring D2D device, allocate a radio resource to the D2D device according to the indication information, and send the radio resource information to the source D2D device.
  • the network side subsystem includes: an eNB, an MME, and a D2D gateway;
  • the D2D gateway is configured to send a notification message to the MME after receiving the request to discover the neighboring D2D device.
  • the MME is configured to send the indication information sent by the D2D gateway to the eNB;
  • the eNB is configured to allocate a radio resource to the D2D device according to the indication information, and send the radio resource information.

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Abstract

本发明公开了一种发现D2D设备的方法，包括：源D2D设备判断当前是否有网络覆盖，若有，则发送发现邻近D2D设备的请求，并接收无线资源信息，根据所述无线资源信息发送公告信息并监听响应信息；若没有，则根据设备中预设的无线资源信息发送公告信息并监听响应信息。本发明还公开了一种发现D2D设备的系统及装置，采用本发明能实现D2D设备间的发现，并且降低D2D设备功耗，提高D2D发现效率。

Description

一种发现 D2D设备的方法、 装置及系统 技术领域
本发明涉及通信领域， 尤其涉及一种发现 D2D设备的方法、 装置及系统。 背景技术
设备到设备（D2D, Device to Device )通信指邻近的设备间直接通信， 如 蓝牙。 D2D通信一般采用非授权频谱， 如 2.4GHz。 D2D包括两个方面： 发现 和通信。 发现即在邻近区域内识别运行 D2D应用的具有 D2D的能力的用户设 备， 通信即 D2D设备通过用户间直联或经过 eNB进行用户面数据传输。 D2D 技术的使用场景包括有网络覆盖 （如商业应用）和无网络覆盖 （如公共安全通 信） 两种， 对于有网络覆盖场景， 一般由网络侧管理 D2D的控制面实现流程， 对于无网络覆盖场景， 一般由 D2D设备本身实现控制面流程。 但是， 目前现有 技术仍无法提供 D2D设备之间的发现方法。 发明内容
有鉴于此，本发明的目的在于提供一种发现 D2D设备的方法、装置及系统， 能实现 D2D设备间的发现， 并且降低 D2D设备功耗， 提高 D2D发现效率。
本发明实施例提供了一种发现 D2D设备的方法， 该方法包括：
源 D2D设备判断当前是否有网络覆盖， 若有， 则发送发现邻近 D2D设备 的请求， 并接收无线资源信息， 根据所述无线资源信息发送公告信息并监听响 应信息；
若没有，则所述源 D2D设备根据自身预设的无线资源信息发送公告信息并 监听响应信息。
上述方案中， 所述判断是否有网络覆盖包括：
所述源 D2D设备根据与网络侧的信令交互和自身已存的网络侧上下文信 息确定是否有网络覆盖，如果源 D2D设备和网络侧有正常信令交互且自身已存 网络侧上下文信息， 则确定有网络侧覆盖； 否则， 确定无网络覆盖。 上述方案中， 所述发现邻近 D2D设备的请求包括以下至少一种信息： 源 标识、 目的标识、 应用标识、 应用月良务器标识、 组标识、 是否有网络覆盖指示、 发现范围、 发现时间窗。
上述方案中， 所述无线资源信息包括以下至少一种： 频率、 帧 /子帧、 重复 周期、 资源索引。
上述方案中， 所述公告信息包括以下至少一种： 源标识、 目的标识、 应用 标识， 组标识、 是否有网络覆盖指示、 是否支持中继、 发现范围、 发现时间窗。
上述方案中， 所述响应信息为： 目标 D2D设备收到源 D2D设备发送的公 告信息后， 向所述源 D2D设备发送的接收确认信息； 所述响应信息由所述目标 D2D设备在分配或预设的无线资源上发送。
上述方案中， 所述无线资源信息， 公告信息和响应信息通过无线资源控制 信令发送。
本发明实施例还提供了一种发现 D2D设备的方法， 所述方法包括：
D2D网关收到发现邻近 D2D设备的请求后，通过移动管理实体 MME向演 进型基站 eNB发送指示信息；
所述 eNB根据所述指示信息为 D2D设备分配无线资源， 并发送无线资源 信息。
上述方案中，所述 D2D网关收到发现邻近 D2D设备的请求后，通过 MME 向 eNB发送指示信息， 包括：
所述 D2D网关根据签约数据或本地存储的数据， 判断所述邻近 D2D设备 的请求中的源 D2D设备和目标 D2D设备是否允许发现或被发现， 如果不是， 则所述 D2D网关向所述源 D2D设备发送拒绝指示信息以及拒绝原因；
如果是， 则所述 D2D网关向所述源 D2D设备和目标设备所在的 MME发 送指示信息。
上述方案中， 所述指示信息包括以下至少一种： 源标识、 目的标识、 应用 标识、 组标识、 是否有网络覆盖指示、 发现范围、 发现时间窗。
本发明实施例还提供了一种 D2D设备， 所述 D2D设备包括： 应用单元和 D2D单元； 其中，
应用单元， 配置为判断当前是否有网络覆盖， 若有， 则向 D2D单元发送发 现邻近 D2D设备的请求， 根据所述无线资源信息， 通过所述 D2D单元发送公 告信息并监听响应信息； 若没有， 则根据预设的无线资源信息， 通过所述 D2D 单元发送公告信息并监听响应信息；
D2D单元， 配置为发送应用单元发来的发现邻近 D2D设备的请求； 以及 将接收到的无线资源信息发送给应用单元； 以及发出应用单元发来的公告信息 和监听响应信息。
上述方案中， 所述应用单元， 配置为根据与网络侧的信令交互和已存的 网络侧上下文信息确定是否有网络覆盖， 如果和网络侧有正常信令交互且已存 网络侧上下文信息， 则确定有网络侧覆盖， 否则， 确定无网络覆盖。
上述方案中， 所述发现邻近 D2D设备的请求包括以下至少一种信息： 源 标识、 目的标识、 应用标识、 应用月良务器标识、 组标识、 是否有网络覆盖指示、 发现范围、 发现时间窗。
上述方案中， 所述无线资源信息包括以下至少一种： 频率、 帧 /子帧、 重复 周期、 资源索引。
上述方案中， 所述公告信息包括以下至少一种： 源标识、 目的标识、 应用 标识， 组标识、 是否有网络覆盖指示、 是否支持中继、 发现范围、 发现时间窗。
上述方案中， 所述响应信息为： 目标 D2D设备收到源 D2D设备发送的公 告信息后， 向所述源 D2D设备发送的接收确认信息； 所述响应信息由所述目标 D2D设备在分配或预设的无线资源上发送。
上述方案中， 所述无线资源信息， 公告信息和响应信息通过无线资源控制 信令发送。
本发明实施例还提供了一种网络侧子系统， 所述网络侧子系统包括： eNB、 MME和 D2D网关； 其中，
D2D网关， 配置为收到发现邻近 D2D设备的请求后， 向 MME发出指示信 MME, 配置为将 D2D网关发来的指示信息发送给 eNB;
eNB, 配置为根据所述指示信息为 D2D设备分配无线资源， 并发送无线资 源信息。
上述方案中， 所述 D2D 网关， 配置为根据签约数据或本地存储的数据， 判断所述邻近 D2D设备的请求中的源 D2D设备和目标 D2D设备是否允许发现 或被发现， 如果不是， 则所述 D2D网关向所述源 D2D设备发送拒绝指示信息 以及拒绝原因； 如果是， 则所述 D2D网关向所述源 D2D设备和目标设备所在 的 MME发送指示信息。
上述方案中， 所述指示信息包括以下至少一种： 源标识、 目的标识、 应用 标识、 组标识、 是否有网络覆盖指示、 发现范围、 发现时间窗。
本发明实施例提供了一种发现 D2D设备的系统，所述系统包括：上述方案 中任一项所述的 D2D设备； 上述方案中任一项所述的网络侧子系统。
本发明所提供的发现 D2D设备的方法、 装置及系统， 通过源 D2D设备判 断当前是否有网络覆盖， 若有， 则发送发现邻近 D2D设备的请求， 并接收无线 资源信息， 根据所述无线资源信息发送公告信息； 若没有， 则根据预设的无线 资源信息发送公告信息。 如此， 只需根据指定的无线资源发送公告消息就能够 实现 D2D设备的发现； 能够避免循环发送公告信息和连续监听响应信息，从而 能够降低 D2D设备的功耗； 另外， 能避免无目的的循环发送公告通知以及连续 监听响应， 从而提高 D2D设备之间的发现效率。 附图说明
图 1为本发明实施例一方法流程示意图；
图 2为本发明实施例二方法流程示意图；
图 3为本发明实施例三方法流程示意图；
图 4为本发明实施例四方法流程示意图；
图 5为本发明实施例五方法流程示意图；
图 6为本发明实施例六 D2D设备组成结构示意图； 图 7为本发明实施例七系统组成结构示意图 具体实施方式
本发明的基本思想是： 源 D2D设备判断当前是否有网络覆盖， 若有， 则 向发送发现邻近 D2D设备的请求， 并接收无线资源信息， 根据所述无线资源信 息发送公告信息； 若没有， 则根据预设的无线资源信息发送公告信息。
下面结合附图及具体实施例对本发明再作进一步详细的说明。
实施例一、
本发明实施例提供的发现 D2D设备的方法中 D2D设备侧的操作流程， 如 图 1所示， 包括：
步驟 101 :源 D2D设备判断当前是否有网络覆盖，如果有，则执行步驟 102; 否则， 执行步驟 104。
这里， 所述判断是否有网络覆盖包括： 所述源 D2D设备根据与网络侧的信 令交互和设备中的上下文信息确定是否有网络覆盖，如果源 D2D设备和网络侧 有正常信令交互且设备中存在网络侧的上下文信息， 则确定有网络侧覆盖， 否 则， 确定无网络覆盖。
其中， 所述有网络覆盖为参与 D2D发现的所有 D2D设备 (包括源和目标 D2D设备）都处于网络覆盖之中； 如果源、 目标 D2D设备中一个或一个以上 不在网络覆盖中， 则为无网络覆盖。
所述源 D2D设备为具有 D2D发现和通信能力、且已经签约使用 D2D功能 的设备。
步驟 102: 所述源 D2D设备发送发现邻近 D2D设备的请求， 并接收无线 资源信息。
这里， 所述发现邻近 D2D设备的请求包括以下至少一种信息： 源标识、 目 的标识、 应用标识、 应用服务器标识、 组标识、 是否有网络覆盖指示、 发现范 围、 发现时间窗。
其中， 所述源标识用于指示发送请求的 D2D设备； 所述目的标识用于指示 希望发现的目标设备； 所述发现范围用于指示发现目标的区域； 所述发现时间 窗用于指示发现的有效时间。
所述无线资源信息通过无线资源控制 （RRC, Radio Resource Control )信 令实现， 所述无线资源信息包括以下至少一种： 频率、 帧 /子帧、 重复周期、 资 源索引；
其中， 所述资源索引为用于指示针对不同 D2D发现需求的无线资源， 如点 到点、 点到多点、 不同的设备间距离等需求； 所述无线资源采用上行无线资源， 即从用户设备到基站的空口资源。 所述无线资源用于 D2D设备间发现。
所述重复周期为： 指示 D2D设备在无线资源上发送 /监听公告信息的时间 间隔。
步驟 103: 所述源 D2D设备根据所述无线资源信息发送公告信息并监听响 应信息， 结束处理流程。
这里，所述公告信息包括以下至少一种：源标识（用于指示发送请求的 D2D 设备）， 目的标识（用于指示希望发现的目标设备）， 应用标识， 组标识， 是否 有网络覆盖指示， 是否支持中继（用于指示可作为中继）， 发现范围（用于指示 发现目标的区域）， 发现时间窗 （用于指示发现的有效时间）等。 所述 D2D公 告信息通过 RRC信令发送。
所述响应信息为： 邻近 D2D设备收到源 D2D设备发送的公告信息后向源 D2D设备发送的接收确认信息。 所述响应信息由目标 D2D设备在分配或预设 的无线资源上发送。 所述响应信息通过空口 RRC信令发送。
步驟 104: 所述源 D2D设备根据自身预设的无线资源信息发送公告信息并 监听响应信息。
所述预设的无线资源信息包括以下至少一种：频率，帧 /子帧，重复周期（用 于指示 D2D设备在无线资源上发送 /监听公告信息的时间间隔）， 资源索引。 所 述预设无线资源为 D2D专用无线资源， 一般采用上行无线资源。 实施例二 本发明实施例提供的发现 D2D设备的方法中网络侧的操作流程，如图 2所 示， 包括：
步驟 201 : D2D网关收到发现邻近 D2D设备的请求后， 通过移动管理实体 ( MME, Mobility Management Entity ) 向 eNB发送指示信息。
具体的， 所述 D2D 网关根据签约数据或本地存储的数据， 判断所述邻近
D2D设备的请求中的源 D2D设备和目标 D2D设备是否允许发现或被发现， 如 果不是，则所述 D2D网关向所述源 D2D设备发送拒绝指示信息以及拒绝原因； 如果是， 则所述 D2D网关向所述源 D2D设备和目标设备所在的 MME发送指 示信息。
其中， 所述源 D2D设备和目标 D2D设备可以位于相同或不同的 MME; 所述 D2D网关根据 D2D设备标识和 D2D设备注册信息确定所述 D2D设 备所在的 MME信息；
所述 MME向源 D2D设备和目标 D2D设备所在的 eNB发送指示信息 , 所 述源和目标 D2D设备可以位于相同或不同的 eNB, 所述 MME根据所述 D2D 的注册信息确定所述 D2D所在的 eNB。
所述指示信息包括以下至少一种： 源标识（用于指示发送请求的 D2D设 备）、 目的标识（用于指示希望发现的目标设备）、 应用标识、 组标识、 是否有 网络覆盖指示、 发现范围（用于指示发现目标的区域）、 发现时间窗（用于指示 发现的有效时间）等。 所述发现时间窗可以采用定时器实现。
步驟 201 : 所述 eNB根据所述指示信息为 D2D设备分配无线资源， 并发送 无线资源信息。 实施例三、
本发明实施例提供的发现 D2D设备的方法， 如图 3所示， 包括：
步驟 301 : 源 D2D设备判断是否有网络覆盖， 如果有， 则执行步驟 302; 否则， 执行步驟 306。
这里， 所述判断是否有网络覆盖包括： 所述 D2D设备根据与网络侧的信令 交互确定是否有网络覆盖， 如果 D2D设备和网络侧有正常信令交互， 则确定有 网络侧覆盖， 否则， 确定无网络覆盖。 其中， 所述有网络覆盖为参与 D2D发现 的所有 D2D设备 (包括源和目标 D2D设备 )都处于网络覆盖之中。
所述 D2D设备为具有 D2D发现和通信能力、且已经签约使用 D2D功能的 设备。
步驟 302: 所述源 D2D设备向 D2D网关发送发现邻近 D2D设备的请求。 这里， 所述 D2D网关为用于实现 D2D功能而部署的网络控制面节点， 可 以是单独的物理节点或附属其他物理节点的逻辑节点，所述 D2D网关可以根据 需要进行命名， 如 D2D控制功能、 D2D服务器等。
所述 D2D设备通过控制面信令向 D2D网关发送所述请求发现消息， 其中 控制面信令为专用于 D2D发现的信令。
所述邻近 D2D设备为邻近区域的 D2D设备， 其中邻近区域为满足事先设 定规则的区域， 即在该区域中可以发现 D2D设备。 所述邻近 D2D设备可以为 一个或多个， 其中多个邻近 D2D设备一般属于共同的组， 一个邻近 D2D设备 一般为： 设备上运行了和发起请求的 D2D设备相同的应用， 如社交、 游戏、 娱 乐、 购物等应用， 或者设备的用户和发起请求的 D2D设备用户为朋友关系。
这里， 所述发现邻近 D2D设备的请求包括以下至少一种信息： 源标识、 目 的标识、 应用标识、 应用服务器标识、 组标识、 是否有网络覆盖指示、 发现范 围、 发现时间窗。
其中， 所述源标识用于指示发送请求的 D2D设备； 所述目的标识用于指示 希望发现的目标设备； 所述发现范围用于指示发现目标的区域； 所述发现时间 窗用于指示发现的有效时间。
所述无线资源信息通过 RRC信令实现，所述无线资源信息包括以下至少一 种： 频率、 帧 /子帧、 重复周期、 资源索引；
所述重复周期为： 指示 D2D设备在无线资源上发送 /监听公告信息的时间 间隔。
步驟 303: D2D网关通过 MME向 eNB发送指示信息。 具体的， 所述 D2D 网关根据签约数据或本地存储的数据进行判断源 D2D 设备和目标 D2D设备是否有发现功能， 以及是否允许发现或被发现， 如果判断 为否， 则 D2D网关向源 D2D设备发送拒绝指示信息， 并说明拒绝原因； 如果 判断为是， 所述 D2D网关向源 D2D设备和目标设备所在的 MME发送指示信 其中， 所述源 D2D设备和目标 D2D设备可以位于相同或不同的 ΜΜΕ; 所述 D2D网关根据 D2D设备标识和 D2D设备注册信息确定所述 D2D设 备所在的 ΜΜΕ信息；
所述 ΜΜΕ向源 D2D设备和目标 D2D设备所在的 eNB发送指示信息 , 所 述源和目标 D2D设备可以位于相同或不同的 eNB , 所述 MME根据所述 D2D 的注册信息确定所述 D2D所在的 eNB。
所述指示信息包括以下至少一种： 源标识（用于指示发送请求的 D2D设 备）、 目的标识（用于指示希望发现的目标设备）、 应用标识、 组标识、 是否有 网络覆盖指示、 发现范围（用于指示发现目标的区域）、 发现时间窗（用于指示 发现的有效时间）等。 所述发现时间窗可以采用定时器实现。
步驟 304: eNB为 D2D设备分配无线资源， 将所述无线资源封装为无线资 源信息， 向源 D2D设备及目标 D2D设备分别发送所述无线资源信息。
所述 eNB可以为： 源 D2D设备和目标 D2D设备所在的 eNB; 所述 eNB 可以为一个或多个（如目标 D2D设备为多个）。
所述无线资源采用上行资源 （UE到 eNB ), 可以是专用的或者通用的； 步驟 305: 源 D2D设备根据所述无线资源信息发送公告信息， 所述目标 D2D设备根据所述无线资源信息监听公告信息， 结束处理流程。
所述源 D2D设备通过所述无线资源发送 D2D公告信息， 目标 D2D设备通 过所述无线资源监听 D2D公告信息；
所述 D2D公告信息用于指示 D2D发现， 包括以下至少一种： 源标识（用 于指示发送请求的 D2D设备 ), 目的标识（用于指示希望发现的目标设备 ), 应 用标识，组标识，是否有网络覆盖指示，是否支持中继（用于指示可作为中继）， 发现范围（用于指示发现目标的区域），发现时间窗（用于指示发现的有效时间） 等。 所述 D2D公告信息通过 RRC信令发送。
目标 D2D设备在所述无线资源上监听公告信息， 如果监听到 D2D公告信 息， 则通过所述无线资源向源 D2D设备发送响应消息， 响应消息用于指示目标 D2D设备收到公告信息， 所述响应消息通过 RRC信令发送。
当源 D2D设备收到目标 D2D设备响应消息，可以进一步源和目标 D2D设 备建立无线连接进行 D2D通信。
步驟 306: 源 D2D设备根据预设的无线资源发送公告信息。
所述 D2D设备不在网络覆盖范围内， 包括两种情况： 1 )源和目标 D2D设 备都不在网络覆盖范围； 2 ) 源和目标 D2D设备有一方处于网络覆盖范围内； 源和目标 D2D设备根据预设的无线资源发送和监听 D2D公告信息；
其中， 所述预设是指在 D2D发现之前已存储在 D2D设备中的无线资源信 息， 所述预设可以通过所述 D2D设备位于网络覆盖时由网络侧分配， 或者由 D2D设备制造商事先配置在 D2D设备中。
所述预设的无线资源信息包括以下至少一种：频率，帧 /子帧，重复周期（用 于指示 D2D设备在无线资源上发送 /监听公告信息的时间间隔）， 资源索引 （用 于指示针对不同 D2D发现需求的无线资源， 如点到点、 点到多点、 不同的设备 间距离等需求）。
目标 D2D设备在所述无线资源上监听公告信息， 如果监听到 D2D公告信 息， 则通过所述无线资源向源 D2D设备发送响应消息， 响应消息用于指示目标 D2D设备收到公告信息， 所述公告信息和响应消息通过 RRC信令发送。
当源 D2D设备收到目标 D2D设备响应消息 ,进一步源和目标 D2D设备建 立无线连接进行 D2D通信。 实施例四、
针对有网络覆盖， D2D设备发现邻近 D2D设备的场景， 发现 D2D设备的 方法如图 4所示， 包括： 步驟 401： 源 D2D设备向 D2D网关发送发现邻近 D2D设备的请求。
所述源 D2D设备和所述 D2D网关之间存在直接接口，所述 D2D网关属于 控制面节点，在拜访网络和归属网络中都存在，如果源 D2D设备处于漫游场景， 则通过拜访网络的 D2D网关发送请求消息， 否则通过归属网络的 D2D网关发 送请求消息。
所述发现邻近 D2D设备的请求为控制面信令，所述请求消息包括以下至少 一种： 源标识， 目标标识， 应用标识， 应用服务器标识（用于指示应用所在的 服务器信息）， 组标识， 是否有网络覆盖指示， 发现范围（用于指示发现目标的 区域）， 发现时间窗（用于指示发现的有效时间）等。 其中， 如果目标为特定的 D2D设备， 则采用目标标识， 如果目标为一组 D2D设备， 则采用组标识， 如 果目标为运行特定应用的 D2D设备， 则采用应用标识。
步驟 402:所述 D2D网关判断是否接受发现请求，如果是，则转向步驟 403; 否则， 转向步驟 409。
这里， 所述 D2D 网关根据以下条件判断是否接受请求： 参与发现的 D2D 设备是否具有 D2D发现功能； 是否允许进行 D2D发现 /被发现； 当目标 D2D 设备为一组 D2D设备时， 源 D2D设备和目标设备是否属于相同的组； 当以上 条件都为是， 则可以接受发现请求； 否则拒绝发现请求。
步驟 403: D2D网关向源 D2D设备发送接受响应消息。
所述 D2D网关通过控制面信令向所述源 D2D设备发送接受响应消息， 所 述响应消息在发现请求消息指定的时间窗内发送。
步驟 404: D2D网关通过 MME向演进型基站（ eNB, evolved NodeB )发 送指示信息。
所述 D2D网关根据 D2D设备的注册信息查询到源 /目标 D2D设备所在的 MME和 eNB , 所述 MME和 eNB可以为一个或多个。
所述指示信息用于指示发现请求， 通过控制面信令传送。
步驟 405, eNB分配无线资源， 并通知参与 D2D发现过程的 D2D设备。 所述分配可以是动态分配， 静态分配或半静态分配， 动态分配是指根据发 现请求类型和网络资源状况， 每次分配不同的资源； 静态分配是指每次分配固 定的资源； 半静态分配是指在一定的资源范围内选择需要的资源。 所述无线资 源采用从 UE到 eNB的上行资源。
所述通知通过 RRC信令传送。
步驟 406: 源 D2D设备根据接收到的无线资源信息发送 D2D公告信息。 所述 D2D公告信息通过 RRC信令传送，所述 D2D公告信息按一定周期重 复发送， 以提高目标 D2D设备接收公告信息的可靠性。 上述 D2D公告周期由 eNB在分配无线资源时确定。
步驟 407: 目标 D2D设备根据接收到的无线资源信息监听 D2D公告信息。 所述目标 D2D设备在分配的无线资源上， 根据公告周期监听 D2D公告信 步驟 408: 监听到公告信息的目标 D2D设备向源 D2D设备发送响应消息， 结束处理流程。
具体的， 如果目标 D2D设备监听到 D2D公告信息， 则通过分配的无线资 源发送响应消息； 如果目标 D2D设备为一组设备， 则目标 D2D设备可以部分 或全部发送响应消息。
所述响应消息为 RRC信令； 所述响应消息在发现时间窗内发送。
步驟 409: D2D网关向源 D2D设备发送拒绝消息。
所述 D2D网关判断不支持 D2D发现请求，则向源 D2D设备发送拒绝消息， 同时指明拒绝原因， 如目标 D2D设备不允许发现， 或源 D2D设备和目标 D2D 设备不属于相同的组， 等等。
所述拒绝消息通过控制信令传送。 如果在发现时间窗内没有收到接受或拒 绝响应消息， 则源 D2D设备认为发现请求失败。 实施例五、
针对无网络覆盖， D2D设备发现邻近 D2D设备的场景， 实现的方法如图 5 所示， 包括： 步驟 501 : 源 D2D设备根据预设的无线资源信息发送 D2D公告信息。 所述预设的无线资源是指在发现之前已存储在 D2D设备上的资源配置信 所述预设可以是当 D2D设备处于网络覆盖时， 由网络侧 eNB配置， 或者 D2D设备制造商根据规则事先配置。
所述预设的无线资源信息包括以下至少一种：频率，帧 /子帧，重复周期（用 于指示 D2D设备在无线资源上发送 /监听公告信息的时间间隔）， 资源索引 （用 于指示针对不同 D2D发现需求的无线资源， 如点到点、 点到多点、 不同的设备 间距离等需求）。
步驟 502: 所述目标 D2D设备在预设的无线资源上监听 D2D公告信息。 所述目标 D2D设备根据预设的周期在所述无线资源上监听 D2D公告信息。 步驟 503: 监听到公告信息的目标 D2D设备向源 D2D设备发送响应消息。 所述响应消息通过 RRC消息传送，所述响应消息在预设的发现时间窗内发 送， 如果在时间窗内没有收到接受或拒绝的响应消息， 则源 D2D设备认为发现 请求失败。 实施例六、
为了实现上述指示消息类型的方法， 本发明实施例提供了一种 D2D设备， 如图 6所示， 包括： 应用单元 61和 D2D单元 61 ; 其中，
应用单元 61 , 配置为判断当前是否有网络覆盖， 若有， 则向 D2D单元 62 发送发现邻近 D2D设备的请求， 根据所述无线资源信息， 通过所述 D2D单元 62发送公告信息并监听响应信息； 若没有， 则根据预设的无线资源信息， 通过 所述 D2D单元 62发送公告信息并监听响应信息；
D2D单元 62, 配置为发送应用单元 61发来的发现邻近 D2D设备的请求； 以及将接收到的无线资源信息发送给应用单元 61 ; 以及发出应用单元 61发来 的公告信息。
所述应用单元 61 , 配置为根据与网络侧的信令交互和已存的网络侧上下文 信息确定是否有网络覆盖， 如果和网络侧有正常信令交互且已存网络侧上下文 信息， 则确定有网络侧覆盖， 否则， 确定无网络覆盖。
所述发现邻近 D2D设备的请求包括以下至少一种信息：源标识、目的标识、 应用标识、 应用服务器标识、 组标识、 是否有网络覆盖指示、 发现范围、 发现 时间窗。 其中， 所述源标识用于指示发送请求的 D2D设备； 所述目的标识用于 指示希望发现的目标设备； 所述发现范围用于指示发现目标的区域； 所述发现 时间窗用于指示发现的有效时间。
所述无线资源信息通过无线资源控制 （RRC )信令实现， 所述无线资源信 息包括以下至少一种： 频率、 帧 /子帧、 重复周期、 资源索引；
所述重复周期为： 指示 D2D设备在无线资源上发送 /监听公告信息的时间 间隔。
所述 D2D公告信息包括以下至少一种： 源标识（用于指示发送请求的 D2D 设备）， 目的标识（用于指示希望发现的目标设备）， 应用标识， 组标识， 是否 有网络覆盖指示， 是否支持中继（用于指示可作为中继）， 发现范围（用于指示 发现目标的区域）， 发现时间窗 （用于指示发现的有效时间）等。 所述 D2D公 告信息通过 RRC信令发送。
所述预设的无线资源信息包括以下至少一种：频率，帧 /子帧，重复周期（用 于指示 D2D设备在无线资源上发送 /监听公告信息的时间间隔）， 资源索引 （用 于指示针对不同 D2D发现需求的无线资源， 如点到点、 点到多点、 不同的设备 间距离等需求）。
所述响应信息为： 目标 D2D设备收到源 D2D设备发送的公告信息后， 向 所述源 D2D设备发送的接收确认信息； 所述响应信息由所述目标 D2D设备在 分配或预设的无线资源上发送。
所述无线资源信息， 公告信息和响应信息通过无线资源控制信令发送。 上述应用单元 61和 D2D单元 61均可以通过 CPU、 DSP等硬件实现。 实施例七、 本发明实施例还提供了一种网络侧子系统，如图 7所示， 该网络侧子包括： eNB, MME和 D2D网关； 其中，
D2D网关， 配置为收到发现邻近 D2D设备的请求后， 向 MME发出指示信
MME, 配置为将 D2D网关发来的指示信息发送给 eNB;
eNB, 配置为根据所述指示信息为 D2D设备分配无线资源， 并发送无线资 源信息。
所述 D2D 网关， 配置为根据签约数据或本地存储的数据， 判断所述邻近 D2D设备的请求中的源 D2D设备和目标 D2D设备是否允许发现或被发现， 如 果不是，则所述 D2D网关向所述源 D2D设备发送拒绝指示信息以及拒绝原因； 如果是， 则所述 D2D网关向所述源 D2D设备和目标设备所在的 MME发送指 示信息。
其中， 所述源 D2D设备和目标 D2D设备可以位于相同或不同的 MME; 所述 D2D网关根据 D2D设备标识和 D2D设备注册信息确定所述 D2D设 备所在的 MME信息；
所述 MME向源 D2D设备和目标 D2D设备所在的 eNB发送指示信息 , 所 述源和目标 D2D设备可以位于相同或不同的 eNB, 所述 MME根据所述 D2D 的注册信息确定所述 D2D所在的 eNB。
所述指示信息包括以下至少一种： 源标识（用于指示发送请求的 D2D设 备）、 目的标识（用于指示希望发现的目标设备）、 应用标识、 组标识、 是否有 网络覆盖指示、 发现范围（用于指示发现目标的区域）、 发现时间窗（用于指示 发现的有效时间）等。 所述发现时间窗可以采用定时器实现。 实施例八、
本发明实施例提供的发现 D2D设备的系统包括： 源 D2D设备及网络侧子 系统； 其中，
源 D2D设备， 配置为判断当前是否有网络覆盖， 若有， 则向网络侧子系 统发送发现邻近 D2D设备的请求， 并接收无线资源信息， 根据所述无线资源信 息发送公告信息并监听响应信息； 若没有， 则根据自身预设的无线资源信息发 送公告信息并监听响应信息；
网络侧子系统， 配置为收到源 D2D设备发来的发现邻近 D2D设备的请求 后， 根据所述指示信息为 D2D设备分配无线资源， 并发送无线资源信息给所述 源 D2D设备。
所述网络侧子系统包括： eNB、 MME和 D2D网关； 其中，
D2D网关， 配置为收到发现邻近 D2D设备的请求后， 向 MME发出指示信
MME, 配置为将 D2D网关发来的指示信息发送给 eNB;
eNB, 配置为根据所述指示信息为 D2D设备分配无线资源， 并发送无线资 源信息。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保护 范围。

Claims

权利要求书
1、 一种发现 D2D设备的方法， 该方法包括：
源 D2D设备判断当前是否有网络覆盖， 若有， 则发送发现邻近 D2D设备 的请求， 并接收无线资源信息， 根据所述无线资源信息发送公告信息并监听响 应信息；
若没有，则所述源 D2D设备根据自身预设的无线资源信息发送公告信息并 监听响应信息。
2、 根据权利要求 1所述的方法， 其中， 所述判断是否有网络覆盖包括： 所述源 D2D设备根据与网络侧的信令交互和自身已存的网络侧上下文信 息确定是否有网络覆盖，如果源 D2D设备和网络侧有正常信令交互且自身已存 网络侧上下文信息， 则确定有网络侧覆盖； 否则， 确定无网络覆盖。
3、 根据权利要求 1所述的方法， 其中， 所述发现邻近 D2D设备的请求包 括以下至少一种信息： 源标识、 目的标识、 应用标识、 应用服务器标识、 组标 识、 是否有网络覆盖指示、 发现范围、 发现时间窗。
4、 根据权利要求 1所述的方法， 其中， 所述无线资源信息包括以下至少一 种： 频率、 帧 /子帧、 重复周期、 资源索引。
5、 根据权利要求 1所述的方法， 其中， 所述公告信息包括以下至少一种： 源标识、 目的标识、 应用标识， 组标识、 是否有网络覆盖指示、 是否支持中继、 发现范围、 发现时间窗。
6、 根据权利要求 1所述的方法， 其中， 所述响应信息为： 目标 D2D设备 收到源 D2D设备发送的公告信息后，向所述源 D2D设备发送的接收确认信息； 所述响应信息由所述目标 D2D设备在分配或预设的无线资源上发送。
7、 根据权利要求 1所述的方法， 其中， 所述无线资源信息， 公告信息和响 应信息通过无线资源控制信令发送。
8、 一种发现 D2D设备的方法， 所述方法包括：
D2D网关收到发现邻近 D2D设备的请求后，通过移动管理实体 MME向演 进型基站 eNB发送指示信息；
所述 eNB根据所述指示信息为 D2D设备分配无线资源， 并发送无线资源 信息。
9、 根据权利要求 8所述的方法， 其中， 所述 D2D网关收到发现邻近 D2D 设备的请求后， 通过 MME向 eNB发送指示信息， 包括：
所述 D2D网关根据签约数据或本地存储的数据， 判断所述邻近 D2D设备 的请求中的源 D2D设备和目标 D2D设备是否允许发现或被发现， 如果不是， 则所述 D2D网关向所述源 D2D设备发送拒绝指示信息以及拒绝原因；
如果是， 则所述 D2D网关向所述源 D2D设备和目标设备所在的 MME发 送指示信息。
10、 根据权利要求 8或 9所述的方法， 其中， 所述指示信息包括以下至少 一种： 源标识、 目的标识、 应用标识、 组标识、 是否有网络覆盖指示、 发现范 围、 发现时间窗。
11、 一种 D2D设备， 所述 D2D设备包括： 应用单元和 D2D单元； 其中， 应用单元， 配置为判断当前是否有网络覆盖， 若有， 则向 D2D单元发送发 现邻近 D2D设备的请求， 根据所述无线资源信息， 通过所述 D2D单元发送公 告信息并监听响应信息； 若没有， 则根据预设的无线资源信息， 通过所述 D2D 单元发送公告信息并监听响应信息；
D2D单元， 配置为发送应用单元发来的发现邻近 D2D设备的请求； 以及 将接收到的无线资源信息发送给应用单元； 以及发出应用单元发来的公告信息 和监听响应信息。
12、 根据权利要求 11所述的 D2D设备， 其中，
所述应用单元， 具体配置为根据与网络侧的信令交互和已存的网络侧上 下文信息确定是否有网络覆盖， 如果和网络侧有正常信令交互且已存网络侧上 下文信息， 则确定有网络侧覆盖， 否则， 确定无网络覆盖。
13、 根据权利要求 11所述的 D2D设备， 其中，
所述发现邻近 D2D设备的请求包括以下至少一种信息：源标识、目的标识、 应用标识、 应用服务器标识、 组标识、 是否有网络覆盖指示、 发现范围、 发现 时间窗。
14、 根据权利要求 11所述的 D2D设备， 其中， 所述无线资源信息包括以 下至少一种： 频率、 帧 /子帧、 重复周期、 资源索引。
15、 根据权利要求 11所述的 D2D设备， 其中， 所述公告信息包括以下至 少一种： 源标识、 目的标识、 应用标识， 组标识、 是否有网络覆盖指示、 是否 支持中继、 发现范围、 发现时间窗。
16、根据权利要求 11所述的 D2D设备，其中，所述响应信息为： 目标 D2D 设备收到源 D2D设备发送的公告信息后， 向所述源 D2D设备发送的接收确认 信息； 所述响应信息由所述目标 D2D设备在分配或预设的无线资源上发送。
17、 根据权利要求 11所述的 D2D设备， 其中， 所述无线资源信息， 公告 信息和响应信息通过无线资源控制信令发送。
18、 一种网络侧子系统， 所述网络侧子系统包括： eNB、 MME和 D2D网 关； 其中，
D2D网关， 配置为收到发现邻近 D2D设备的请求后， 向 MME发出指示信
MME, 配置为将 D2D网关发来的指示信息发送给 eNB;
eNB, 配置为根据所述指示信息为 D2D设备分配无线资源， 并发送无线资 源信息。
19、 根据权利要求 18所述的网络侧子系统， 其中，
所述 D2D网关， 具体配置为根据签约数据或本地存储的数据， 判断所述邻 近 D2D设备的请求中的源 D2D设备和目标 D2D设备是否允许发现或被发现， 如果不是， 则所述 D2D网关向所述源 D2D设备发送拒绝指示信息以及拒绝原 因； 如果是， 则所述 D2D网关向所述源 D2D设备和目标设备所在的 MME发 送指示信息。
20、 根据权利要求 18或 19所述的网络侧子系统， 其中， 所述指示信息包 括以下至少一种： 源标识、 目的标识、 应用标识、 组标识、 是否有网络覆盖指 发现范围、 发现时间窗。
21、 一种发现 D2D设备的系统， 所述系统包括： 权利要求 11-17任一项所述的 D2D设备； 权利要求 18-20任一项所述的网络侧子系统。
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