WO2014121507A1 - 设备到设备通信方法、终端和网络设备 - Google Patents

设备到设备通信方法、终端和网络设备 Download PDF

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Publication number
WO2014121507A1
WO2014121507A1 PCT/CN2013/071554 CN2013071554W WO2014121507A1 WO 2014121507 A1 WO2014121507 A1 WO 2014121507A1 CN 2013071554 W CN2013071554 W CN 2013071554W WO 2014121507 A1 WO2014121507 A1 WO 2014121507A1
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WO
WIPO (PCT)
Prior art keywords
communication
terminal
cell
enable
information
Prior art date
Application number
PCT/CN2013/071554
Other languages
English (en)
French (fr)
Inventor
蔺波
赵超
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP13874589.8A priority Critical patent/EP2947955B1/en
Priority to PCT/CN2013/071554 priority patent/WO2014121507A1/zh
Priority to CN201910053314.0A priority patent/CN109640311B/zh
Priority to CN201380003312.1A priority patent/CN104770050B/zh
Publication of WO2014121507A1 publication Critical patent/WO2014121507A1/zh
Priority to US14/821,374 priority patent/US9877273B2/en
Priority to US15/840,688 priority patent/US10880822B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/16Discovering, processing access restriction or access information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/005Discovery of network devices, e.g. terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • H04B17/318Received signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup

Definitions

  • the present invention relates to communications technologies, and in particular, to a device to device (D2D) communication method, a terminal, and a network device.
  • D2D device to device
  • D2D communication is a technology that allows terminals to communicate directly through the application of available resources. It can reduce the transmission power of the terminal, reduce the load on the base station, and solve the problem of lack of spectrum resources of the wireless communication system to some extent.
  • D2D communication has a D2D communication mode that does not depend on the network. In this mode, the terminal can work in the unlicensed frequency band, and the terminal autonomously scans the resources available to the surrounding, and performs neighbor terminal discovery and data transmission processes.
  • Network-independent D2D communication can be applied in public security scenarios, such as public security scenarios, when the cellular network is not working properly in an earthquake or emergency. Since network-independent D2D communication is not involved in the network, a terminal can discover neighbor terminals in time so that terminals outside the earthquake or emergency can communicate with terminals in an earthquake or emergency, thereby facilitating timely rescue. However, this type of communication does not meet the controllable needs of the network. Summary of the invention
  • the embodiments of the present invention provide a D2D communication method, a terminal, and a network device, which are controllable by the network.
  • a D2D communication method including:
  • the first terminal acquires network information, where the network information includes a cell coverage result and/or a system message sent by the network device;
  • the first terminal determines to enable the D2D communication, the first terminal autonomously discovers the second terminal, and directly performs the D2D communication with the second terminal.
  • determining, according to the network information, whether to enable D2D communication includes:
  • the system message includes indication information for disabling the D2D communication, or the following items are not included in the system message: indication information allowing the D2D communication, early warning information, and resource information of the D2D communication, And the first terminal determines to prohibit the D2D communication from being turned on; or
  • the first terminal determines to enable the D2D communication.
  • the cell coverage result includes a discovery result of the first terminal to the cell
  • the determining, according to the network information, whether to enable the D2D communication includes: if the first terminal-to-cell discovery result indicates that the first terminal can discover the location Determining, by the first terminal, whether to enable the D2D communication according to the system message;
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, and the measurement result includes a signal strength and/or a signal quality;
  • the early warning information includes:
  • the cell coverage result includes a discovery result of the first terminal to the cell; and if the network information includes the cell coverage result, Determining whether to enable D2D communication according to the network information, including: if the discovery result of the first terminal to the cell indicates that the first terminal cannot be at all supported frequency points Discovering the cell, the first terminal determines to enable the D2D communication; and/or,
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, where the measurement result includes a signal strength and/or a signal quality; if the network information includes the cell coverage result, the according to the network Information, determine whether to enable D2D communication, including:
  • the first terminal determines to enable the D2D communication when the threshold is set.
  • the first terminal determines, according to the network information, whether to enable D2D communication, The method further includes: the first terminal detecting a user identity module of the first terminal, and determining that the user identity module can be detected.
  • the acquiring, by the first terminal, network information includes:
  • the radio resource control RRC layer of the first terminal After the radio resource control RRC layer of the first terminal receives the D2D open request sent by the non-access NAS layer or the application layer of the first terminal, the RRC layer acquires the network information.
  • determining, by the first terminal, whether to enable D2D communication according to the network information Determining, according to the network information, that the D2D communication is prohibited from being turned on;
  • the method further includes: if the D2D start request is sent by the NAS layer, the RRC layer sends a D2D open request denial message to the NAS layer, The NAS layer prohibits the first terminal from enabling the D2D communication, or if the D2D open request is sent by the application layer, the RRC layer sends a D2D open request denial message to the application layer.
  • the application layer prohibits the first terminal from enabling the D2D communication; or
  • the RRC layer prohibits the first terminal from enabling the D2D communication.
  • Determining whether to enable the D2D communication according to the network information the determining, by the RRC layer, determining, according to the network information, that the D2D communication is enabled;
  • the first terminal starts the D2D communication, and includes: If the D2D enable request is sent by the NAS layer, the RRC layer sends a D2D open request acknowledgement message to the NAS layer, where the NAS layer triggers the first terminal to enable the D2D communication, or if The D2D start request is sent by the application layer, and the RRC layer sends a D2D open request acknowledgement message to the application layer, where the application layer triggers the first terminal to enable the D2D communication;
  • the RRC layer triggers the first terminal to enable the D2D communication.
  • a D2D communication method including:
  • the network device generates a first signal, where the first signal includes a system message or a detection signal; the network device sends the first signal to the first terminal, where the first signal is used to make the first terminal according to the The first signal determines whether to enable the D2D communication of the second terminal to be discovered autonomously, and after determining to enable the D2D communication, the second terminal is autonomously discovered, and the D2D communication is directly performed with the second terminal.
  • the system message carries the indication information that prohibits the D2D communication, or the following items are not included in the system message: the indication information that allows the D2D communication, the early warning information, and the resource information of the D2D communication, And configured to enable the first terminal to determine to disable the D2D communication according to the system message; or
  • the system message includes at least one of the following items: the indication information that allows the D2D communication, the resource information of the D2D communication, and the warning information, where the first terminal determines, according to the system message, Turn on the D2D communication.
  • the foregoing warning information includes:
  • the first signal is a detection signal, configured to enable the first terminal to apply the detection signal to perform cell discovery or measure the detection signal. And determining whether to enable the D2D communication according to the cell discovery result, or determining whether to enable the D2D communication according to the measurement result of the detection signal.
  • a terminal is provided, where the terminal is a first terminal, and the terminal includes: An acquiring module, configured to acquire network information, where the network information includes: a cell coverage result and/or a system message sent by the network device;
  • a determining module configured to determine, according to the network information acquired by the acquiring module, whether to initiate device-to-device D2D communication for autonomously discovering the second terminal;
  • a communication module configured to: after the determining module determines to enable the D2D communication, independently discover the second terminal, and directly perform the D2D communication with the second terminal.
  • the determining module is specifically configured to determine whether to enable device-to-device D2D communication as follows:
  • the system message includes indication information for disabling the D2D communication, or the following items are not included in the system message: indication information allowing the D2D communication, early warning information, and resource information of the D2D communication, Determining that the D2D communication is prohibited from being turned on; or
  • the system message includes at least one of the following items: the indication information of the D2D communication, the resource information of the D2D communication, and the warning information, determining to enable the D2D communication.
  • the cell coverage result includes a discovery result of the first terminal to the cell, and if the network information is further Including the cell coverage result, the determining module is specifically configured to determine, according to the network information, whether to enable D2D communication according to the following manner: if the first terminal-to-cell discovery result indicates that the first terminal can discover the cell Determining whether to enable the D2D communication according to the system message;
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, where the measurement result includes a signal strength and/or a signal quality; if the network information further includes the cell coverage result, the determining module is specific Determining whether to enable D2D communication according to the network information as follows: if the measurement result indicates that the measurement result of the cell with the best measurement result is higher than a set threshold, or the measurement result indicates measurement of at least one cell When the result is higher than the set threshold, it is determined whether to open the D2D communication according to the system message.
  • the early warning included in the system message acquired by the acquiring module Information includes: Tsunami Warning System ETWS information, and/or, Commercial Mobile Early Warning System CMSA information.
  • the determining module is specifically configured to determine whether to enable device-to-device D2D communication as follows:
  • the cell coverage result includes the first terminal-to-cell discovery result, if the first terminal-to-cell discovery result indicates that the first terminal cannot discover the cell at all supported frequency points, Determining that the D2D communication is turned on; and/or,
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell
  • the measurement result includes a signal strength and/or a signal quality
  • the measurement result of the best cell is lower than the set threshold, or when the measurement result of the signal of the cell indicates that the measurement result of all the cells is lower than the set threshold, it is determined to enable the D2D communication.
  • the determining module is further configured to: before determining whether to enable D2D communication, detecting the foregoing A user identity module of a terminal, and determining that the user identity module can be detected.
  • the terminal further includes:
  • radio resource control RRC entity module includes the acquisition module
  • a non-access stratum NAS entity module configured to generate a D2D open request
  • the acquiring module is configured to obtain network information as follows: after receiving the D2D open request generated by the NAS entity module, acquiring the network information; Or
  • the application layer entity module is configured to generate a D2D open request, where the acquiring module is configured to obtain the network information as follows: after receiving the D2D open request generated by the application layer entity module, acquiring the network information.
  • the RRC entity module further includes the determining module
  • the determining module is further configured to:
  • the determining module determines to prohibit the D2D communication from being turned on and if the D2D is turned on, And determining, by the NAS entity unit, that the determining module sends a D2D open request denial message to the NAS entity module;
  • the NAS entity module is further configured to: after receiving the D2D open request denial message, prohibit the communication module from starting the D2D communication;
  • the determining module is further configured to:
  • the determining module determines that the D2D communication is prohibited from being turned on and if the D2D open request is sent by the application layer entity module, the determining module sends a D2D open request denial message to the application layer entity module; the application After receiving the D2D open request denial message, the layer entity module prohibits the communication module from enabling D2D communication.
  • the RRC entity module further includes the determining module
  • the determining module is further configured to: if the determining module determines to enable the D2D communication and if the D2D open request is sent by the NAS entity module, the determining module sends a D2D open request acknowledgement message to the communication module So that the communication module triggers the D2D communication to be turned on; or
  • the determining module is further configured to: if the determining module determines to enable the D2D communication and if the D2D open request is sent by the application layer entity module, the determining module sends a D2D open request confirmation to the communication module a message to cause the communication module to trigger the D2D communication to be turned on.
  • a network device including:
  • a generating module configured to generate a first signal, where the first signal includes a system message or a detection signal
  • a sending module configured to send, by the first terminal, the first signal generated by the generating module, to enable the first terminal to determine, according to the first signal, whether to enable device-to-device D2D communication, and determine to open the device
  • the D2D communication is started, the second terminal is autonomously discovered, and the D2D communication is directly performed with the second terminal.
  • the fourth aspect in a first possible implementation manner of the fourth aspect, if the first signal generated by the generating module includes a system message,
  • the system message carries the indication information that prohibits the D2D communication, or the following items are Not included in the system message: indication information that allows the D2D communication, early warning information, and resource information of the D2D communication, for causing the first terminal to determine to prohibit opening the D2D communication according to the system message; or,
  • the system message includes at least one of the following items: the indication information that allows the D2D communication, the resource information of the D2D communication, and the warning information, where the first terminal determines, according to the system message, Turn on the D2D communication.
  • the early warning information included in the system message generated by the generating module includes: a tsunami warning system ETWS Information, and / or, commercial mobile warning system CMSA information.
  • the first signal generated by the generating module includes a detection signal, configured to enable the first terminal to apply the detection signal to perform cell discovery. Or measuring the detection signal, and determining whether to enable the D2D communication according to the cell discovery result, or determining whether to enable the D2D communication according to the measurement result of the detection signal.
  • a terminal is provided, where the terminal is a first terminal, and the terminal includes: a processor, configured to acquire network information, where the network information includes a cell coverage result and/or a system message sent by the network device; And determining, according to the network information, whether to enable D2D communication for autonomously discovering the second terminal; and, after determining to enable the D2D communication, turning on the D2D communication, autonomously discovering the second terminal, and controlling transmission and reception And performing the D2D communication directly with the second terminal;
  • a processor configured to acquire network information, where the network information includes a cell coverage result and/or a system message sent by the network device; And determining, according to the network information, whether to enable D2D communication for autonomously discovering the second terminal; and, after determining to enable the D2D communication, turning on the D2D communication, autonomously discovering the second terminal, and controlling transmission and reception And performing the D2D communication directly with the second terminal;
  • the transceiver is configured to directly perform the D2D communication with the second terminal under the control of the processor.
  • the processor is specifically configured to determine whether to enable D2D communication as follows:
  • the system message includes indication information for disabling the D2D communication, or the following items are not included in the system message: indication information allowing the D2D communication, early warning information, and resource information of the D2D communication, Determining that the D2D communication is prohibited from being turned on; or
  • the system message includes at least one of the following items: the indication information of the D2D communication, the resource information of the D2D communication, and the early warning information, determining to enable the D2D Communication.
  • the cell coverage result includes a discovery result of the first terminal to the cell, and if the network information is further Including the cell coverage result, the processor is specifically configured to determine, according to the network information, whether to enable D2D communication according to the following manner: if the discovery result indicates that the first terminal can discover the cell, according to the system message Determining whether to enable the D2D communication;
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, where the measurement result includes a signal strength and/or a signal quality; if the network information further includes the cell coverage result, the processor specifically Determining whether to enable D2D communication according to the network information as follows: if the measurement result of the signal of the first terminal to the cell indicates that the measurement result of the cell with the best measurement result is higher than a set threshold, or When the measurement result of the signal of the cell indicates that the measurement result of the at least one cell is higher than the set threshold, determining whether to enable the D2D communication according to the system message.
  • the processor is specifically configured to determine whether to enable D2D communication as follows:
  • the cell coverage result includes the first terminal-to-cell discovery result and the first terminal-to-cell discovery result indicates that the first terminal cannot discover the cell at all supported frequency points, determine Turning on the D2D communication; and/or,
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell
  • the measurement result includes a signal strength and/or a signal quality
  • the measurement result of the signal of the first terminal to the cell indicates The measurement result of the cell with the best measurement result is lower than the set threshold, or when the measurement result of the signal of the cell indicates that the measurement result of all the cells is lower than the set threshold, it is determined that the D2D communication is turned on.
  • the processor is further configured to: determine whether to enable D2D communication, check The user identity module of the first terminal is measured, and it is determined that the user identity module can be detected.
  • the processor includes a non-access NAS layer entity, a radio resource control RRC layer entity, and an application layer entity;
  • the NAS layer entity is configured to generate a D2D open request
  • the RRC layer entity is configured to: after receiving the D2D open request sent by the NAS layer entity, acquire the network information; or
  • the application layer entity is configured to generate a D2D open request
  • the RRC layer entity is configured to obtain the network information after receiving a D2D open request sent by the application layer entity.
  • the RRC layer entity is further configured to: if it is determined to prohibit the D2D communication from being enabled and if the D2D is enabled And sending, by the NAS layer entity, a D2D open request denial message to the NAS layer entity; the NAS layer entity is further configured to prohibit the D2D communication from being enabled; or
  • the RRC layer entity is further configured to: if it is determined that the D2D communication is prohibited from being enabled, and if the D2D open request is sent by the application layer entity, send a D2D open request denial message to the application layer entity, where the application layer The entity prohibits opening the D2D communication; or
  • the RRC layer entity is further configured to, if it is determined that the D2D communication is prohibited from being turned on, prohibit the opening of the D2D communication.
  • the RRC layer entity is further configured to: if it is determined to enable the D2D communication and send the D2D open request acknowledgement message to the NAS layer entity, if the D2D open request is sent by the NAS layer entity, the NAS layer entity Also used to trigger to enable the D2D communication; or
  • the RRC layer entity is further configured to: if it is determined that the D2D communication is enabled, and if the D2D open request is sent by the application layer entity, send a D2D open request acknowledgement message to the application layer entity; Also used to trigger to enable the D2D communication; or
  • the RRC layer entity is further configured to trigger to enable the D2D communication if it is determined to enable the D2D communication.
  • a network device including: a processor, configured to generate a first signal, where the first signal includes a system message or a detection signal, and a transmitter, configured to send, by the first terminal, the first signal generated by the processor, to enable the first Determining, according to the first signal, whether device-to-device D2D communication is enabled, and after determining to enable the D2D communication, opening the D2D communication of autonomously discovering the second terminal, and autonomously discovering the second terminal, so that the terminal The first terminal and the second terminal directly perform the D2D communication.
  • the first signal includes a system message
  • the system message sent by the sender carries the indication information for disabling the D2D communication, or the following items are not included in the system message: indication information, early warning information, and the D2D that allow the D2D communication
  • the resource information of the communication configured to enable the first terminal to determine to disable the D2D communication according to the system message; or
  • the system message sent by the sender includes at least one of the following: an indication information that allows the D2D communication, resource information of the D2D communication, and early warning information, where the first terminal is configured to The system message determines to enable the D2D communication.
  • the early warning information included in the system message sent by the sender includes: a tsunami warning system ETWS Information, and / or, commercial mobile warning system CMSA information.
  • the first signal that is sent by the transmitter includes a detection signal, configured to enable the first terminal to apply the detection signal to perform cell discovery. Or measuring the detection signal, and determining whether to enable the D2D communication according to the cell discovery result, or determining whether to enable the D2D communication according to the measurement result of the detection signal.
  • the terminal determines whether to enable the D2D communication according to the network information, and can implement the network controllable; by directly communicating between the terminals during the D2D communication, the problem caused by the unavailability of the base station in the disaster can be solved, and the requirements of the public security scenario are met. . Therefore, it is achieved that both the network is controllable and can be applied in a public security scenario.
  • FIG. 1 is a schematic flow chart of an embodiment of a D2D communication method according to the present invention.
  • FIG. 2 is a schematic flow chart of another embodiment of a D2D communication method according to the present invention.
  • FIG. 3 is a schematic flowchart of another embodiment of a D2D communication method according to the present invention.
  • FIG. 4 is a schematic structural diagram of a D2D communication according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of another embodiment of a D2D communication method according to the present invention.
  • FIG. 6 is a schematic flowchart of another embodiment of a D2D communication method according to the present invention.
  • FIG. 7 is a schematic structural diagram of a D2D communication in an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of an embodiment of a terminal according to the present invention.
  • 9a is a schematic structural diagram of another embodiment of a terminal according to the present invention.
  • 9b is a schematic structural diagram of another embodiment of a terminal according to the present invention.
  • FIG. 10 is a schematic structural diagram of an embodiment of a network device according to the present invention.
  • FIG. 11 is a schematic structural diagram of another embodiment of a network device according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • a user equipment may be referred to as a terminal (Mobile), a mobile station ("Mobile Station” (MS) for short) or a mobile terminal (Mobile Terminal).
  • the user equipment can communicate with one or more core networks via a Radio Access Network (“RAN"), for example, the user equipment can be a mobile phone (or “cellular” phone) Or a computer with a mobile terminal, etc., for example, the user device can also be a portable, pocket, handheld or computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • RAN Radio Access Network
  • the network device may be a base station, an access point (Access Point, referred to as "AP"), a remote radio device (Remote Radio Equipment, referred to as "RRE”), and a remote radio head (Remote Radio). Head, referred to as "RRH”, Remote Radio Unit (RRU) or Relay Node (“RN”).
  • the base station may be a base station (Base Transceiver Station, abbreviated as “BTS”) in GSM or CDMA, or a base station (NodeB, abbreviated as “NB”) in WCDMA, or an evolved base station in LTE (evolved Node) B, abbreviated as "ENB or e-NodeB”).
  • BTS Base Transceiver Station
  • NodeB base station
  • NB evolved base station in LTE (evolved Node) B, abbreviated as "ENB or e-NodeB”
  • the network device may also be other devices having a scheduling function, such as a UE having
  • FIG. 1 is a schematic flowchart of an embodiment of a D2D communication method according to an embodiment of the present invention, including:
  • the first terminal acquires network information, where the network information includes a cell coverage result and/or a system message sent by the network device;
  • the system message may be System Information (SI), which carries parameters such as cell selection or reselection, access to the network, and transmission or reception of data.
  • SI System Information
  • the terminals may have different names.
  • user equipment UE is taken as an example.
  • the UE may obtain network information in the following manner:
  • the UE discovers a cell, and receives a system message sent by the cell; where the system message may be broadcast by the base station; or
  • the UE obtains the coverage result of the cell, and the coverage result may be a result of the UE's discovery of the cell, or a measurement result of the signal of the cell.
  • Step 12 The first terminal determines, according to the network information, whether to initiate autonomous discovery of the second terminal D2D communication (hereinafter referred to as D2D communication);
  • the UE may determine whether to enable according to the information carried in the system message.
  • the information carried in the system message may be the indication information for indicating the prohibition or the opening.
  • the terminal may determine to disable the D2D communication according to the system message, and the system message carries the permission.
  • the terminal may determine to allow the D2D communication to be started according to the system message.
  • Information systems carried in the message can be early warning information
  • the warning information may include seismic and sea-1 ⁇ Warning System (Earthquake and Tsunami Warning System, ETWS ) information and / or commercial mobile alert system (Commercial Mobile Alert System, CMAS) information
  • the terminal may determine to allow the D2D communication to be started according to the system message.
  • the information carried in the system message may also be resource information used for D2D communication.
  • the terminal may determine, according to the system message, that D2D communication is allowed to be enabled.
  • the system message may carry the remaining information, the remaining information does not include the indication information allowing the D2D communication, the foregoing warning information, and the resource information for the D2D communication.
  • the terminal may determine to prohibit the D2D communication from being started according to the system message.
  • the network controls the D2D communication by acquiring the information carried in the system message, that is, the network is controllable.
  • the cell coverage result is used to indicate whether the UE is in a coverage vulnerability, including a UE discovery result to the cell, or a measurement result of the signal to the cell. For example, when the UE cannot find a cell at all the supported frequency points, it may indicate that the UE is in the coverage vulnerability, and then it may be determined that the D2D communication is enabled.
  • the discovery of one cell refers to that the UE can obtain the identifier of the cell. And synchronized with the cell.
  • the measurement result of the signal of the cell indicates that the measurement result of the cell with the best measurement result is lower than the set threshold, or the measurement result of the signal of the cell indicates that all
  • the measurement result includes signal strength and/or signal quality.
  • the result of the discovery of the cell by the UE may be that the UE acquires the discovery result of the cell corresponding to the base station by measuring the detection signal sent by the base station.
  • the UE may obtain the cell coverage result by measuring the measurement signal sent by the base station, and the base station controls the network to control the D2D communication by sending the measurement signal, that is, the network is controllable.
  • the result of the discovery of the cell by the UE may be that the UE acquires the discovery result of the cell corresponding to the base station by measuring the detection signal sent by the base station.
  • the UE if the network information is a cell coverage result, and the discovery result indicates that the first terminal can discover the cell or the measurement result of the signal of the first terminal to the cell indicates that the measurement result is the best cell measurement. The result is higher than the set threshold, or the measurement result of the signal of the cell indicates that the measurement result of the at least one cell is higher than the set threshold, the UE further acquires the system message, and determines whether to enable according to the indication of the system message. D2D communication, as described in the above embodiment. In this embodiment, the UE may obtain the cell coverage result by measuring the measurement signal sent by the base station, and the base station controls the network to control the D2D communication by transmitting the measurement signal, that is, the network is controllable.
  • the network information includes a system message and a cell coverage result, and if the first terminal-to-cell discovery result indicates that the first terminal can discover the cell, that is, the first terminal is in the cell coverage, the A terminal determines whether to enable the D2D communication according to the system message.
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, where the measurement result includes a signal strength and/or a signal quality; if the network information includes a system message and a cell coverage result, the according to the network Determining whether to enable D2D communication, including: if the measurement result of the signal of the first terminal to the cell indicates that the measurement result of the best cell is higher than a set threshold, or a signal to the cell If the measurement result indicates that the measurement result of the at least one cell is higher than the set threshold, the first terminal determines whether to enable the D2D communication according to the system message.
  • the UE may obtain the cell coverage result by measuring the measurement signal sent by the base station, and the base station controls the network to control the D2D communication by sending the measurement signal, that is, the network is controllable.
  • the first terminal determines to enable the D2D communication, the first terminal autonomously discovers the second terminal, and directly performs the D2D communication with the second terminal.
  • the direct communication between the first terminal and the second terminal may also be referred to as the D2D communication independent of the network and/or can be used for a public security scenario, or pure D2D communication (pure D2D), or directly D2D communication.
  • the signal does not pass through the base station, or the establishment of the communication link does not require the participation of the base station, and the terminal can perform neighbor discovery (ie, autonomously discover the second terminal) and perform communication resource negotiation by itself.
  • the D2D communication can be unidirectional, such as one terminal transmitting one signal and another terminal detecting Measurement. Specifically, for example, during disaster relief, the trapped UE intermittently transmits D2D signals as vital signal features to help rescuers find. or,
  • the D2D communication process may also be bidirectional, and may specifically include the following steps:
  • the first step is to synchronize between UEs
  • the UE performs discovery on the selected resource, assuming that the first UE finds the second UE.
  • the first UE pages the second UE, and the second UE replies to the first UE that sends the paging message.
  • the UEs that have passed the paging process send data to each other, that is, the first UE and the second UE send data to each other.
  • the determining, by the first terminal, whether to enable the D2D communication of the second terminal to be autonomously discovered, according to the network information may further include: the first terminal detecting the user identity module of the terminal And determining that the user identity module can be detected. In this way, it is possible to prevent certain users from deliberately pulling out the user identity module to deceive the network and use the problem caused by D2D communication privately.
  • the network side can perform the following steps:
  • the network device generates a first signal, where the first signal is a system message or a detection signal; 22: the network device sends the first signal to a terminal, where the first signal is used to enable the terminal according to the The first signal determines whether to enable the D2D communication of the second terminal to be discovered autonomously, and after determining to enable the D2D communication, the second terminal is autonomously discovered, and the D2D communication is directly performed with the second terminal.
  • the network device may be a base station, such as an evolved NodeB (eNB).
  • eNB evolved NodeB
  • the detection signal may refer to a signal sent by the base station to the terminal for cell discovery or signal measurement, for example, Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS), and cell-specific reference signal (Cell- Specific
  • CRS Channel Status Information
  • CSI-RS Reference Signal
  • the network it is determined whether the D2D communication is enabled through the network information, and the network can be controlled to ensure the interests of the operator; in addition, the communication between the terminals is directly used in the D2D communication, that is, After the terminal determines that the D2D communication is enabled, the terminal can perform neighbor discovery (autonomous discovery of the second terminal) and communication resource negotiation, and the network does not need to indicate the discovery resource and the communication resource, which can solve the problem that the base station cannot provide support in the disaster scenario.
  • the problem is that D2D communication is still applicable in public security scenarios to meet the needs of timely rescue.
  • the UE may also detect its own user identity module detection result. If the user identity module cannot be detected, the UE determines to prohibit D2D communication.
  • the user identity module may include a Subcriber Identity Module (SIM), a User Identity Module (UIM), or a Universal Subscriber Identity Module (USIM).
  • SIM Subcriber Identity Module
  • UIM User Identity Module
  • USIM Universal Subscriber Identity Module
  • the UE may know the UE. Is there a SIM card?
  • the D2D communication is prohibited, and the problem that some users deliberately pull out the user identity module to deceive the network and use the D2D communication privately can be prevented.
  • FIG. 3 is a schematic flowchart of another embodiment of a D2D communication method according to the present invention, including:
  • NAS Non-Access Stratum
  • RRC Radio Resource Control
  • the RRC layer After receiving the D2D start request, the RRC layer can receive the system message sent by the cell,
  • the RRC layer determines whether to enable D2D communication according to the system message, and if so, executes 33, otherwise executes 34.
  • the system message may be obtained by the UE by performing a cell selection process, and the cell selection process performed by the UE may include:
  • the UE obtains a cell identity and synchronizes with the cell by searching a synchronization channel;
  • the UE measures the cell reference signal and reads the system message of the cell.
  • the UE finds any of the following cells in the process, it indicates that the UE can receive the system message of the cell.
  • the PLMN indicated by the public land mobile network (PLMN) information carried in the system message broadcasted by the cell is the PLMN selected by the UE, or the PLMN registered by the UE, or located in the same PLMN list of the UE;
  • the CSG ID carried in the system message broadcast by the cell is in the CSG white list of the UE;
  • the cell is not prohibited;
  • the tracking area (TA) to which the cell belongs is not a tracking area where roaming is prohibited.
  • the signal of the cell satisfies the criteria for cell selection.
  • the criterion that the cell signal satisfies the cell selection includes the signal strength of the cell and/or the signal quality of the cell satisfies the cell selection criterion.
  • the cell is called an acceptable cell.
  • the accepted cell should meet the following two conditions:
  • the cell is not prohibited
  • the signal quality of the cell satisfies the criteria for cell selection.
  • the system message sent by the cell carries information indicating that the cell is reserved.
  • the UE may determine, according to the information, whether the cell is a reserved cell.
  • the reserved cell may be reserved for the operator tester, and other personnel may not access.
  • the system message sent by the cell carries information indicating that the cell is forbidden, and the UE may determine, according to the information, whether the cell is a forbidden cell.
  • the forbidden cell may refer to a cell that is set to be disabled in the network deployment or optimization phase, and all UEs cannot access because the service cannot be obtained even if the access is performed.
  • the system message carries any of the following information, it indicates that the D2D communication cannot be enabled: carrying the prohibition D2D communication indication information; or
  • the system does not carry the prohibition indication information, and only broadcasts system messages that do not include the indication information allowing D2D communication, the ETWS information, the CMS A information, and the resource information of the D2D communication.
  • the system message When the system message carries at least one of the following information, it indicates that the D2D communication can be enabled: carrying the D2D communication indication information;
  • the warning information includes the ETWS information and/or the CMAS information; and carrying the resource information for the D2D communication, where the resource information may be a subframe, a frequency domain resource block, or a time-frequency resource block.
  • the indication information for the D2D communication may be carried while carrying the resource information, or the resource information may be pre-agreed as the resource information for the D2D communication.
  • the UE may determine to enable D2D communication.
  • the resource information required for the D2D communication may be the resource information carried in the system message, or may be the resource information pre-agreed by the communication parties. Need to be carried in the system message.
  • the RRC layer sends a D2D open request acknowledgement message to the NAS layer or the application layer, and the NAS layer or the application layer or the RRC layer triggers the UE to enable D2D communication or enable D2D communication on the D2D communication resource.
  • the UE on the right side may find a neighboring UE after the D2D communication is started according to the system message, such as a UE located in the coverage of the damaged base station on the left side, and then the two UEs may perform pure D2D communication. In order to timely support the UE on the left side.
  • the RRC layer triggers the UE to enable D2D communication or open a message on the D2D communication resource.
  • the RRC layer sends a D2D open request denial message to the NAS layer or the application layer, and the NAS layer or the application layer or the RRC layer prohibits the UE from starting D2D communication.
  • the D2D communication in 33 and 34 is direct communication between the terminals, the D2D communication is independent of the network and/or can be used in a public security scenario, and may be referred to as network-independent D2D communication or pure D2D communication.
  • the RRC layer may not send the D2D open request denial message to the NAS layer or the application layer.
  • the coverage result of the cell may be further obtained.
  • the coverage result of the cell may be further obtained.
  • the base station sends a system message to the UE, and the UE determines, according to the system message, whether to enable D2D communication, which is controllable by the network, and the UE performs pure D2D communication after determining the D2D communication, and no longer depends on the network, and can apply the D2D communication.
  • the base station sends a system message to the UE, and the UE determines, according to the system message, whether to enable D2D communication, which is controllable by the network, and the UE performs pure D2D communication after determining the D2D communication, and no longer depends on the network, and can apply the D2D communication.
  • a disaster scenario In a disaster scenario.
  • FIG. 5 is a schematic flowchart of another embodiment of a D2D communication method according to the present invention, including:
  • the NAS layer or the application layer of the UE sends a D2D open request to the RRC layer of the UE.
  • the RRC layer After receiving the D2D start request, if the RRC layer does not have a SIM card in the UE, the RRC layer sends a D2D start request denial message to the NAS layer or the application layer, by the NAS layer or the application layer or
  • the RRC layer prohibits the UE from starting D2D communication.
  • the RRC layer may also not send a D2D open request denial message to the NAS layer or the application layer.
  • the user identity module is a SIM card as an example. It can be understood that the user identity module can also be a UIM, a USIM, or the like.
  • the D2D communication is a direct communication between terminals, does not depend on the network and/or can be used in a public security scenario, and may be referred to as network-independent D2D communication or pure D2D communication.
  • pure D2D communication can be enabled or disabled according to whether the system message is received or according to the indication information in the system message.
  • D2D communication is prohibited when there is no SIM card in the UE, which can prevent certain users from deliberately pulling out the SIM card to deceive the network and use the D2D communication problem privately.
  • FIG. 6 is a schematic flowchart of another embodiment of a D2D communication method according to the present invention, including:
  • the NAS layer or the application layer of the UE sends a D2D open request to the RRC layer.
  • the RRC layer After receiving the D2D start request, the RRC layer obtains the coverage result of the cell. If the coverage result indicates that the UE is in the coverage vulnerability, the RRC layer sends a D2D open request acknowledgement message to the NAS layer or the application layer, by the NAS layer or the application layer or the RRC. The layer triggers the UE to enable D2D communication.
  • the RRC layer may also not send a D2D open request acknowledgement message to the NAS layer or the application layer.
  • the D2D communication is a direct communication between the terminals, does not depend on the network and/or can be used in a public security scenario, and may be referred to as network-independent D2D communication or pure D2D communication. Wherein, when the following conditions are met, it indicates that the UE is in the coverage vulnerability:
  • the coverage result is the result of the UE's discovery of the cell.
  • the UE cannot find a cell at all supported frequency points, it indicates that the UE is in the coverage vulnerability.
  • the finding a small area is that the UE obtains the identifier of the cell and synchronizes with the cell.
  • the coverage result is the measurement result of the signal of the UE to the cell.
  • the signal quality is lower than the set threshold.
  • the UE is at the coverage vulnerability.
  • the above “signal quality” can be replaced by "signal strength” or the combination of two is measured signal quality and signal strength.
  • the signal strength and/or signal quality of the cell or all cells with the best signal strength and/or signal quality is lower than the set threshold, including two measurement methods:
  • the RRC layer discovers the signal strength and/or signal quality of the cell by measuring the signal of the cell. Fixed threshold; or,
  • the physical layer detects that the physical layer measurement value of the cell is lower than a set threshold by using a signal of the measurement cell, the measurement value is a signal strength and/or a signal quality, and the physical layer sends an indication to the RRC layer, where the indication is used to notify the RRC layer UE.
  • the RRC layer At the coverage hole of the base station.
  • the signal of the cell may be a Cell-specific Reference Signal (CRS), or may be a Channel Status Information Reference Signal (CSI-RS), or may be used for measurement. Reference signal used.
  • the signal strength can be Reference Signal Receiving Power (RSRP), and the signal quality can be Reference Signal Receiving Quality (RSRQ).
  • RSRP Reference Signal Receiving Power
  • RSSQ Reference Signal Receiving Quality
  • the UE on the left side of the damaged base station coverage after measuring that it is in the coverage hole, can perform pure D2D communication with the UE on the right side to ensure that it is rescued in time.
  • the network-independent D2D communication can be enabled or disabled according to the system message or the SIM card.
  • the system message or the SIM card For details, refer to the foregoing embodiment.
  • FIG. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal may be specifically a first terminal, where the terminal 80 includes an obtaining module 81, a determining module 82, and a communication module 83.
  • the network information of the obtaining module 81 includes: a cell coverage result.
  • the determining module 82 is configured to determine, according to the network information acquired by the obtaining module 81, whether to enable D2D communication for autonomously discovering the second terminal; the communication module 83 is configured to be in the determining module After determining that the D2D communication is enabled, the second terminal is autonomously discovered, and the D2D communication is directly performed with the second terminal.
  • the determining module 82 is specifically configured to determine whether to enable device-to-device D2D communication as follows:
  • the system message includes indication information for disabling the D2D communication, or the following items are not included in the system message: indication information allowing the D2D communication, early warning information, and resource information of the D2D communication, Determining that the D2D communication is prohibited from being turned on; or
  • the system message includes at least one of the following items: the indication information of the D2D communication, the resource information of the D2D communication, and the warning information, determining to enable the D2D communication.
  • the cell coverage result includes a discovery result of the first terminal to the cell;
  • the network information further includes the cell coverage result, and the determining module 82 is specifically configured to determine, according to the network information, whether to enable D2D communication: if the first terminal-to-cell discovery result indicates the first The terminal can discover the cell, and determine, according to the system message, whether to enable the D2D communication;
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, where the measurement result includes a signal strength and/or a signal quality; and if the network information further includes the cell coverage result, the determining module 82 Specifically, it is used to determine whether to enable D2D communication according to the network information as follows: if the measurement result indicates that the measurement result of the cell with the best measurement result is higher than a set threshold, or the measurement result indicates that at least one cell When the measurement result is higher than the set threshold, it is determined whether to open the D2D communication according to the system message.
  • the warning information included in the system message acquired by the obtaining module 81 includes: ETWS information, and/or CMSA information.
  • the determining module 82 is specifically configured to: determine whether to enable device-to-device D2D communication as follows:
  • the cell coverage result includes the first terminal-to-cell discovery result, if the first terminal-to-cell discovery result indicates that the first terminal cannot discover the cell at all supported frequency points, Determining that the D2D communication is turned on; and/or,
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell
  • the measurement result includes a signal strength and/or a signal quality
  • the measurement result of the signal of the first terminal to the cell indicates that the measurement result is the most The measurement result of the good cell is lower than the set threshold, or when the measurement result of the signal of the cell indicates that the measurement result of all the cells is lower than the set threshold, it is determined to enable the D2D communication.
  • the determining module 82 is further configured to: determine whether the user identity module of the first terminal is detected before determining whether to enable D2D communication, and determine that the user identity module can be detected.
  • the terminal further includes: an RRC entity module, where the RRC entity module includes the acquiring module 81;
  • a NAS entity module configured to generate a D2D open request
  • the obtaining module 81 is configured to obtain network information as follows: after receiving the D2D open request generated by the NAS entity module, acquiring the network information; or
  • the application layer entity module is configured to generate a D2D open request.
  • the obtaining module 81 is configured to obtain the network information as follows: after receiving the D2D open request generated by the application layer entity module, acquiring the network information.
  • the RRC entity module further includes the determining module
  • the determining module 82 is specifically configured to determine that the communication module 83 is prohibited from enabling D2D communication after the D2D communication is enabled.
  • the determining module 82 is further configured to:
  • the determining module 82 determines that the D2D communication is prohibited from being turned on and if the D2D open request is sent by the NAS entity unit, the determining module 82 sends a D2D open request denial message to the NAS entity module;
  • the NAS entity module is further configured to: after receiving the D2D open request denial message, prohibit the communication module 83 from opening the D2D communication;
  • the determining module 82 is further configured to:
  • the determining module 82 determines that the D2D communication is prohibited from being turned on and if the D2D open request is sent by the application layer entity module, the determining module 82 sends a D2D open request denial message to the application layer entity module; After the application layer entity module receives the D2D open request denial message, the communication module 83 is prohibited from enabling D2D communication.
  • the RRC entity module further includes the determining module 82;
  • the determining module 82 is specifically configured to determine that the communication module 83 is triggered to enable D2D communication after the D2D communication is enabled.
  • the determining module 82 is further configured to: if the determining module 82 determines to enable the D2D communication and if the D2D open request is sent by the NAS entity module, the determining module 82 sends a D2D open to the communication module. Requesting a confirmation message to cause the communication module 83 to trigger the D2D communication to be turned on; or
  • the determining module 82 is further configured to: if the determining module 82 determines to enable the D2D communication and if the D2D open request is sent by the application layer entity module, the determining module 82 sends a D2D to the communication module. A request confirmation message is turned on to cause the communication module 83 to trigger the D2D communication to be turned on.
  • the determining module is configured to detect a user identity module of the terminal, determine that the user identity module cannot be detected, and determine that the communication module is prohibited from enabling the D2D communication. This embodiment can be used alone or in combination with the above embodiments.
  • the above modules may be embedded in the hardware of the base station in hardware, or may be stored in the terminal in the software, such as the memory of the UE, so that the processor calls the corresponding operations of the above modules.
  • the processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.
  • the terminal shown in FIG. 8 can perform the corresponding steps in the foregoing embodiments. For details, refer to the description of the foregoing embodiment. The effect achieved can also be seen in the above embodiments.
  • FIG. 9a is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • the terminal 90 includes a transceiver 91 and a processor 92.
  • the terminal may further include a common component such as a memory, an antenna, a baseband processing component, a medium-frequency processing component, an input/output device, and the like, and the embodiment of the present invention is not limited thereto.
  • the processor 92 is configured to acquire network information, where the network information includes a cell coverage result and/or a system message sent by the network device, and configured to determine, according to the network information, whether to enable the D2D communication of the autonomously discovering the second terminal; And, after determining to enable the D2D communication, turning on the D2D communication, autonomously discovering the second terminal, and controlling the transceiver 91 to directly perform the D2D communication with the second terminal;
  • the transceiver 91 is configured to directly perform the D2D communication with the second terminal under the control of the processor 92.
  • the processor 92 is specifically configured to determine whether to enable D2D communication as follows:
  • the system message includes indication information for disabling the D2D communication, or the following items are not included in the system message: indication information allowing the D2D communication, early warning information, and resource information of the D2D communication, Determining that the D2D communication is prohibited from being turned on; or
  • the system message includes at least one of the following items: the indication information of the D2D communication, the resource information of the D2D communication, and the warning information, determining to enable the D2D communication.
  • the cell coverage result includes a discovery result of the first terminal to the cell; if the network information further includes the cell coverage result, the processor 92 is specifically configured to use the network information according to the following manner. Determining whether to enable D2D communication: if the discovery result indicates the first The terminal can discover the cell, determine, according to the system message, whether to enable the D2D communication; and/or,
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell, where the measurement result includes a signal strength and/or a signal quality; and if the network information further includes the cell coverage result, the processor 92
  • the method is specifically configured to determine, according to the network information, whether to enable D2D communication: if the measurement result of the signal of the first terminal to the cell indicates that the measurement result of the cell with the best measurement result is higher than a set threshold, or And if the measurement result of the signal of the cell indicates that the measurement result of the at least one cell is higher than the set threshold, determining whether to enable the D2D communication according to the system message.
  • the warning information acquired by the processor 92 includes:
  • the processor 92 is specifically configured to determine whether to enable D2D communication as follows:
  • the cell coverage result includes the first terminal-to-cell discovery result and the first terminal-to-cell discovery result indicates that the first terminal cannot discover the cell at all supported frequency points, determine Turning on the D2D communication; and/or,
  • the cell coverage result includes a measurement result of the signal of the first terminal to the cell
  • the measurement result includes a signal strength and/or a signal quality
  • the measurement result of the signal of the first terminal to the cell indicates The measurement result of the cell with the best measurement result is lower than the set threshold, or when the measurement result of the signal of the cell indicates that the measurement result of all the cells is lower than the set threshold, it is determined that the D2D communication is turned on.
  • the processor 92 is further configured to: before determining whether to enable D2D communication, detecting a user identity module of the first terminal, and determining that the user identity module can be detected.
  • the processor 92 includes a NAS layer entity 921, an RRC layer entity 922, and an application layer entity 923;
  • the NAS layer entity 921 is configured to generate a D2D open request
  • the RRC layer entity 922 is configured to: after receiving the D2D open request sent by the NAS layer entity 921, acquire the network information; or
  • the application layer entity 923 is configured to generate a D2D open request.
  • the RRC layer entity 922 is configured to obtain the network information after receiving a D2D open request sent by the application layer entity.
  • the RRC layer entity 922 is further configured to: if it is determined that the D2D communication is prohibited from being enabled, and if the D2D open request is sent by the NAS layer entity, send a D2D open request denial to the NAS layer entity 921.
  • the NAS layer entity is further configured to prohibit opening the D2D communication; or
  • the RRC layer 922 entity is further configured to: if it is determined that the D2D communication is prohibited from being enabled, and if the D2D open request is sent by the application layer entity, send a D2D open request denial message to the application layer entity 923, where The application layer entity 923 is forbidden to enable the D2D communication; or the RRC layer entity 922 is further configured to, if it is determined that the D2D communication is prohibited from being turned on, prohibit the opening of the D2D communication.
  • the RRC layer entity 922 is further configured to: if the D2D communication is determined to be enabled, and if the D2D open request is sent by the NAS layer entity 921, send a D2D open request confirmation to the NAS layer entity 921.
  • the NAS layer entity 921 is further configured to trigger to enable the D2D communication; or
  • the RRC layer entity 922 is further configured to: if it is determined to enable the D2D communication and if the D2D open request is sent by the application layer entity 923, send a D2D open request acknowledgement message to the application layer entity 923;
  • the application entity layer 923 is further configured to trigger to enable the D2D communication; or
  • the RRC layer entity 922 is further configured to trigger to enable the D2D communication if it is determined to enable the D2D communication.
  • FIG. 8 and FIG. 9a and FIG. 9b may be used to implement any method provided by the terminal in the foregoing method embodiments, and descriptions about network information, its acquisition mode, D2D communication, and the like.
  • the method embodiment is the same as the above method, and details are not described herein again.
  • the network can be controlled and the interests of the operator can be ensured.
  • direct communication between the terminals in the D2D communication can solve the problem that the base station cannot provide support in the disaster scenario, so that D2D communication is still applicable in public scenes to meet the needs of timely rescue.
  • the network device 100 includes a generating module 101 and a sending module 102.
  • the generating module 101 is configured to generate a first signal, where the first signal includes a system message or a detection signal.
  • the module 102 is configured to send the first signal generated by the generating module to the first terminal, where the first terminal determines, according to the first signal, whether Turning on device-to-device D2D communication, and after determining to enable the D2D communication, turning on the D2D communication, autonomously discovering the second terminal, and directly performing the D2D communication with the second terminal.
  • the system message carries indication information that prohibits the D2D communication, or the following items are not included in the system message:
  • the indication information of the D2D communication, the warning information, and the resource information of the D2D communication are used to enable the first terminal to determine to prohibit the D2D communication from being opened according to the system message; or
  • the system message includes at least one of the following items: the indication information that allows the D2D communication, the resource information of the D2D communication, and the warning information, where the first terminal determines, according to the system message, Turn on the D2D communication.
  • the warning information included in the system message generated by the generating module includes:
  • ETWS information and / or, CMSA information.
  • the first signal generated by the generating module includes a detection signal, configured to enable the first terminal to apply the detection signal to perform cell discovery or measure the detection signal, and determine whether to enable according to a cell discovery result.
  • the D2D communication or determining whether to enable the D2D communication according to a measurement result of the detection signal.
  • the above sending module can be a transmitter or a transceiver, and is implemented as a transceiver corresponding to hardware.
  • the above generation module may be embedded in the hardware of the base station or in the form of software, and may be stored in a network device, such as a memory of the base station, in order to facilitate the processor to invoke the operations corresponding to the above modules.
  • the processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.
  • FIG. 11 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the network device 110 includes a processor 111 and a transmitter 112.
  • the network device may further include a general component such as a memory, a receiver, an antenna, a baseband processing component, a medium RF processing component, an input and output device, etc., and the transmitter and the receiver may be combined together as a transceiver, and the embodiment of the present invention does not Any further restrictions.
  • the processor 111 is configured to generate a first signal, where the first signal includes a system message or a detection signal, and the transmitter 112 is configured to send, by the first terminal, the first signal generated by the processor, to enable the first Determining, according to the first signal, whether the device-to-device D2D communication is enabled, and after determining to enable the D2D communication, enabling the autonomous discovery of the D2D communication of the second terminal, The second terminal is found, so that the first terminal and the second terminal directly perform the D2D communication.
  • the first signal includes a system message;
  • the system message sent by the transmitter 112 carries the indication information for prohibiting the D2D communication, or the following items are not included in the system message: indication information, early warning information, and the The resource information of the D2D communication, configured to enable the first terminal to determine to disable the D2D communication according to the system message; or
  • the system message sent by the transmitter 112 includes at least one of the following: an indication information that allows the D2D communication, resource information of the D2D communication, and early warning information, where the first terminal is used to Determining that the D2D communication is turned on according to the system message.
  • the warning information included in the system message sent by the sender 112 includes: ETWS information, and/or CMSA information.
  • the first signal sent by the transmitter 112 includes a detection signal, configured to enable the first terminal to apply the detection signal to perform cell discovery or measure the detection signal, and determine, according to a cell discovery result, whether The D2D communication is turned on, or whether the D2D communication is turned on according to a measurement result of the detection signal.
  • FIG. 10 and FIG. 11 may be used to implement any method provided by the network device in the foregoing method embodiments, and related to system messages, detection signals, acquisition modes thereof, D2D communication, and the like.
  • the foregoing method embodiments are described, and details are not described herein again.
  • the network can be controlled to ensure the interests of the operator; in addition, direct communication between the terminals during D2D communication can solve the problem that the base station cannot provide support in the disaster scenario, so that D2D Communication is still applicable in public scenarios to meet the needs of timely rescue.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative, for example, the division of the modules or units is only a logical function division, There may be additional ways of dividing, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software function unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program code. .

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Abstract

本发明提供了一种设备到设备(D2D)通信方法、终端和网络设备。该方法包括:第一终端获取网络信息,所述网络信息包括小区覆盖结果和/或网络设备发送的系统消息(11);所述第一终端根据所述网路信息,确定是否开启自主发现第二终端的D2D通信(12);以及,如果所述第一终端确定开启所述D2D通信,所述第一终端自主发现所述第二终端,并于所述第二终端直接进行所述D2D通信(13)。本发明实施例可以满足网络可控。

Description

设备到设备通信方法、 终端和网络设备
技术领域
本发明涉及通信技术,尤其涉及一种设备到设备( Device to Device, D2D ) 通信方法、 终端和网络设备。 背景技术
D2D通信是一种允许终端之间通过应用可用资源直接进行通信的技术, 能够降低终端发射功率, 减轻基站的负荷, 并且在一定程度上解决无线通信 系统频谱资源匮乏的问题。 目前, D2D通信有一种是不依赖网络的 D2D通信 模式, 在这种模式下, 终端可以工作在免许可频段, 终端自主扫描到周围可 用的资源, 并进行邻居终端发现和数据传输过程。
不依赖网络的 D2D通信, 可以应用在公共安全场景下, 如公共安全场景 可以为地震或紧急情况下,蜂窝网络不能正常工作时。由于不依赖网络的 D2D 通信是网络不参与的, 一个终端能够及时发现邻居终端, 以便处于地震或紧 急情况外的终端能够与处于地震或紧急情况内的终端通信, 从而有助于实施 及时救援。 但是, 这种通信方式不能满足网络可控的需求。 发明内容
有鉴于此, 本发明实施例提供了一种 D2D通信方法、 终端和网络设备, 满足网络可控。
第一方面, 提供了一种 D2D通信方法, 包括:
第一终端获取网络信息, 所述网络信息包括小区覆盖结果和 /或网络设备 发送的系统消息;
所述第一终端根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信; 以及,
如果所述第一终端确定开启所述 D2D通信,所述第一终端自主发现所述 第二终端, 并与所述第二终直接进行所述 D2D通信。
结合第一方面, 在第一方面的第一种可能的实现方式中, 如果所述网络信息包括所述系统消息, 所述根据所述网络信息, 确定是 否开启 D2D通信, 包括:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 则所述第一终端确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 则所述第一终端确定开 启所述 D2D通信。
结合第一方面的第一种可能的实现方式, 在第一方面的第二种可能的实 现方式中, 所述小区覆盖结果包括所述第一终端对小区的发现结果;
如果所述网络信息还包括所述小区覆盖结果,则所述根据所述网络信息, 确定是否开启 D2D通信, 包括: 如果所述第一终端对小区的发现结果表明所 述第一终端能够发现所述小区, 则所述第一终端根据所述系统消息确定是否 开启所述 D2D通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量;
如果所述网络信息还包括所述小区覆盖结果,则所述根据所述网络信息, 确定是否开启 D2D通信, 包括: 如果所述第一终端对所述小区的信号的测量 结果表明测量结果最好的小区的测量结果高于设定的门限, 或者, 对所述小 区的信号的测量结果表明至少一个小区的测量结果高于设定的门限时, 则所 述第一终端根据所述系统消息确定是否开启所述 D2D通信。
结合第一方面的第一种或第二种可能的实现方式, 在第一方面的第三种 可能的实现方式中, 所述预警信息包括:
海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。 结合第一方面, 在第一方面的第四种可能的实现方式中, 所述小区覆盖 结果包括所述第一终端对小区的发现结果; 如果所述网络信息包括所述小区 覆盖结果, 所述根据所述网络信息, 确定是否开启 D2D通信, 包括: 如果所 述第一终端对小区的发现结果表明所述第一终端在所有支持的频点上都不能 发现所述小区, 所述第一终端确定开启所述 D2D通信; 和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果所述网络信息包括所述小区覆盖结 果, 所述根据所述网络信息, 确定是否开启 D2D通信, 包括:
如果所述第一终端对所述小区的信号的测量结果表明测量结果最好的小 区的测量结果低于设定的门限, 或者, 对所述小区的信号的测量结果表明全 部小区的测量结果低于设定的门限时,所述第一终端确定开启所述 D2D通信。
结合第一方面或第一方面的任一种可能的实现方式中, 在第一方面的第 五种可能的实现方式中,所述第一终端根据所述网络信息,确定是否开启 D2D 通信之前, 所述方法还包括: 所述第一终端检测所述第一终端的用户身份模 块, 并且确定能够检测到所述用户身份模块。
结合第一方面或第一方面的任一种可能的实现方式, 在第一方面的第六 种可能的实现方式中, 所述第一终端获取网络信息, 包括:
所述第一终端的无线资源控制 RRC 层接收到所述第一终端的非接入 NAS层或应用层发送的 D2D开启请求后, 所述 RRC层获取所述网络信息。
结合第一方面的第五种可能的实现方式, 在第一方面的第七种可能的实 现方式中,所述第一终端根据所述网络信息,确定是否开启 D2D通信, 包括: 所述 RRC层根据所述网络信息确定禁止开启所述 D2D通信;
所述 RRC层确定禁止开启所述 D2D通信之后, 所述方法还包括: 如果所述 D2D开启请求为所述 NAS层发送的, 则所述 RRC层向所述 NAS层发送 D2D开启请求否认消息, 所述 NAS层禁止所述第一终端开启所 述 D2D通信, 或者, 如果所述 D2D开启请求为所述应用层发送的, 则所述 RRC层向所述应用层发送 D2D开启请求否认消息,所述应用层禁止所述第一 终端开启所述 D2D通信; 或者,
所述 RRC层禁止所述第一终端开启所述 D2D通信。
结合第一方面的第六种或第七种可能的实现方式, 在第一方面的第八种 可能的实现方式中,
所述第一终端根据所述网络信息, 确定是否开启 D2D通信, 包括: 所述 RRC层根据所述网络信息确定开启所述 D2D通信;
所述第一终端开启所述 D2D通信, 包括: 如果所述 D2D开启请求为所述 NAS层发送的, 则所述 RRC层向所述 NAS层发送 D2D开启请求确认消息, 所述 NAS层触发所述第一终端开启所 述 D2D通信, 或者, 如果所述 D2D开启请求为所述应用层发送的, 则所述 RRC层向所述应用层发送 D2D开启请求确认消息 ,所述应用层触发所述第一 终端开启所述 D2D通信;
或者,
所述 RRC层触发所述第一终端开启所述 D2D通信。
第二方面, 提供了一种 D2D通信方法, 包括:
网络设备生成第一信号, 所述第一信号包括系统消息或者检测信号; 所述网络设备向第一终端发送所述第一信号, 所述第一信号用于使所述 第一终端根据所述第一信号确定是否开启自主发现第二终端的 D2D通信,并 在确定开启所述 D2D通信后, 自主发现所述第二终端, 并与所述第二终端直 接进行所述 D2D通信。
结合第二方面, 在第二方面的第一种可能的实现方式中,
如果所述第一信号包括所述系统消息,
则所述系统消息中携带禁止所述 D2D通信的指示信息, 或者, 如下项均 不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及所 述 D2D通信的资源信息,用于使所述第一终端根据所述系统消息确定禁止开 启所述 D2D通信; 或者,
则所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指示 信息, 所述 D2D通信的资源信息、 以及预警信息, 用于使所述第一终端根据 所述系统消息确定开启所述 D2D通信。
结合第二方面的第一种可能的实现方式, 在第二方面的第二种可能的实 现方式中, 所述预警信息包括:
海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。 结合第二方面, 在第二方面的第三种可能的实现方式中, 所述第一信号 为检测信号, 用于使所述第一终端应用所述检测信号进行小区发现或者测量 所述检测信号, 并根据小区发现结果确定是否开启所述 D2D通信, 或者根据 对所述检测信号的测量结果确定是否开启所述 D2D通信。
第三方面, 提供了一种终端, 所述终端为第一终端, 所述终端包括: 获取模块, 用于获取网络信息, 所述网络信息包括: 小区覆盖结果和 /或 网络设备发送的系统消息;
确定模块, 用于根据所述获取模块获取的所述网络信息, 确定是否开启 自主发现第二终端的设备到设备 D2D通信; 以及,
通信模块, 用于在所述确定模块确定开启所述 D2D通信后, 自主发现第 二终端, 并与第二终端直接进行所述 D2D通信。
结合第三方面, 在第三方面的第一种可能的实现方式中, 如果所述网络 信息包括所述系统消息, 所述确定模块具体用于按如下方式确定是否开启设 备到设备 D2D通信:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 则确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 则确定开启所述 D2D 通信。
结合第三方面的第一种可能的实现方式, 在第三方面的第二种可能的实 现方式中, 所述小区覆盖结果包括所述第一终端对小区的发现结果; 如果所 述网络信息还包括所述小区覆盖结果, 所述确定模块具体用于按如下方式根 据所述网络信息确定是否开启 D2D通信: 如果所述第一终端对小区的发现结 果表明所述第一终端能够发现所述小区, 根据所述系统消息确定是否开启所 述 D2D通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果所述网络信息还包括所述小区覆盖 结果, 所述确定模块具体用于按如下方式根据所述网络信息确定是否开启 D2D通信: 如果所述测量结果表明测量结果最好的小区的测量结果高于设定 的门限, 或者, 所述测量结果表明至少一个小区的测量结果高于设定的门限 时, 根据所述系统消息确定是否开启所述 D2D通信。
结合第三方面的第一种或第二种可能的实现方式, 在第三方面的第三种 可能的实现方式中, 所述述获取模块获取的所述系统消息所包含的所述预警 信息包括: 海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信 息。
结合第三方面, 在第三方面的第四种可能的实现方式中, 如果所述网络 信息包括所述小区覆盖结果, 所述确定模块具体用于按如下方式确定是否开 启设备到设备 D2D通信:
如果所述小区覆盖结果包括所述第一终端对小区的发现结果, 如果所述 第一终端对小区的发现结果表明所述第一终端在所有支持的频点上都不能发 现所述小区, 则确定开启所述 D2D通信; 和 /或,
如果所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所 述测量结果包括信号强度和 /或信号质量, 如果所述第一终端对所述小区的信 号的测量结果表明测量结果最好的小区的测量结果低于设定的门限, 或者, 对所述小区的信号的测量结果表明全部小区的测量结果低于设定的门限时, 则确定开启所述 D2D通信。
结合第三方面或第三方面的任一种可能的实现方式, 在第三方面的第五 种可能的实现方式中, 所述确定模块还用于, 确定是否开启 D2D通信之前, 检测所述第一终端的用户身份模块,并且确定能够检测到所述用户身份模块。
结合第三方面或第三方面的第一种至第四种任一种可能的实现方式, 在 第三方面的第六种可能的实现方式中, 所述终端还包括:
无线资源控制 RRC实体模块, 其中, 所述 RRC实体模块包括所述获取 模块; 以及
非接入层 NAS实体模块, 用于生成 D2D开启请求; 其中, 所述获取模 块具体用于按如下方式获取网络信息: 接收所述 NAS 实体模块生成的 D2D 开启请求后, 获取所述网络信息; 或者
应用层实体模块, 用于生成 D2D开启请求; 其中, 所述获取模块具体用 于按如下方式获取网络信息:接收所述应用层实体模块生成的 D2D开启请求 后, 获取所述网络信息。
结合第三方面的第六种可能的实现方式, 在第三方面的第七种可能的实 现方式中, 所述 RRC实体模块还包括所述确定模块;
所述确定模块还用于:
如果所述确定模块确定禁止开启所述 D2D通信且如果所述 D2D开启请 求为所述 NAS实体单元发送的,所述确定模块向所述 NAS实体模块发送 D2D 开启请求否认消息;
所述 NAS实体模块还用于, 收到所述 D2D开启请求否认消息后, 禁止 所述通信模块开启所述 D2D通信;
或者, 所述确定模块还用于:
如果所述确定模块确定禁止开启所述 D2D通信且如果所述 D2D开启请 求为所述应用层实体模块发送的, 所述确定模块向所述应用层实体模块发送 D2D开启请求否认消息;所述应用层实体模块用于收到 D2D开启请求否认消 息后, 禁止所述通信模块开启 D2D通信。
结合第三方面的第六种或第七种可能的实现方式, 在第三方面的第八种 可能的实现方式中,
所述 RRC实体模块还包括所述确定模块;
所述确定模块还用于,如果所述确定模块确定开启所述 D2D通信且如果 所述 D2D开启请求为所述 NAS实体模块发送的, 所述确定模块向所述通信 模块发送 D2D开启请求确认消息以使所述通信模块触发开启所述 D2D通信; 或者,
所述确定模块还用于,如果所述确定模块确定开启所述 D2D通信且如果 所述 D2D开启请求为所述应用层实体模块发送的,所述确定模块向所述通信 模块发送 D2D开启请求确认消息, 以使所述通信模块触发开启所述 D2D通 信。
第四方面, 提供了一种网络设备, 包括:
生成模块, 用于生成第一信号, 所述第一信号包括系统消息或者检测信 号;
发送模块, 用于向第一终端发送所述生成模块生成的所述第一信号, 用 于使所述第一终端根据所述第一信号确定是否开启设备到设备 D2D通信,并 在确定开启所述 D2D通信后, 开启所述 D2D通信, 自主发现第二终端, 并 与所述第二终端直接进行所述 D2D通信。
结合第四方面, 在第四方面的第一种可能的实现方式中, 如果所述生成 模块生成的所述第一信号包括系统消息,
则所述系统消息中携带禁止所述 D2D通信的指示信息, 或者, 如下项均 不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及所 述 D2D通信的资源信息,用于使所述第一终端根据所述系统消息确定禁止开 启所述 D2D通信; 或者,
则所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指示 信息, 所述 D2D通信的资源信息、 以及预警信息, 用于使所述第一终端根据 所述系统消息确定开启所述 D2D通信。
结合第四方面的第一种可能的实现方式, 在第四方面的第二种可能的实 现方式中, 所述生成模块生成的所述系统消息中包含的所述预警信息包括: 海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。 结合第四方面, 在第四方面的第三种可能的实现方式中, 所述生成模块 生成的所述第一信号包括检测信号, 用于使所述第一终端应用所述检测信号 进行小区发现或者测量所述检测信号, 并根据小区发现结果确定是否开启所 述 D2D通信, 或者根据对所述检测信号的测量结果确定是否开启所述 D2D 通信。
第五方面, 提供了一种终端, 所述终端为第一终端, 所述终端包括: 处理器, 用于获取网络信息, 所述网络信息包括小区覆盖结果和 /或网络 设备发送的系统消息; 以及, 用于根据所述网络信息, 确定是否开启自主发 现第二终端的 D2D通信;以及,在确定开启所述 D2D通信后,开启所述 D2D 通信, 自主发现所述第二终端, 并控制收发器与所述第二终端直接进行所述 D2D通信;
所述收发器, 用于在所述处理器的控制下与所述第二终端直接进行所述 D2D通信。
结合第五方面, 在第五方面的第一种可能的实现方式中, 如果所述网络 信息包括所述系统消息, 所述处理器具体用于按如下方式确定是否开启 D2D 通信:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 则确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 则确定开启所述 D2D 通信。
结合第五方面的第一种可能的实现方式, 在第五方面的第二种可能的实 现方式中, 所述小区覆盖结果包括所述第一终端对小区的发现结果; 如果所 述网络信息还包括所述小区覆盖结果, 所述处理器具体用于按如下方式根据 所述网络信息确定是否开启 D2D通信: 如果所述发现结果表明所述第一终端 能够发现所述小区, 根据所述系统消息确定是否开启所述 D2D通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果所述网络信息还包括所述小区覆盖 结果, 所述处理器具体用于按如下方式根据所述网络信息确定是否开启 D2D 通信: 如果所述第一终端对所述小区的信号的测量结果表明测量结果最好的 小区的测量结果高于设定的门限, 或者, 对所述小区的信号的测量结果表明 至少一个小区的测量结果高于设定的门限时, 根据所述系统消息确定是否开 启所述 D2D通信。
结合第五方面的第一种或第二种可能的实现方式, 在第五方面的第三种 可能的实现方式中, 所述处理器获取的所述预警信息包括:
海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。 结合第五方面, 在第五方面的第四种可能的实现方式中, 如果所述网络 信息包括所述小区覆盖结果, 所述处理器具体用于按如下方式确定是否开启 D2D通信:
如果所述小区覆盖结果包括所述第一终端对小区的发现结果且所述第一 终端对小区的发现结果表明所述第一终端在所有支持的频点上都不能发现所 述小区, 则确定开启所述 D2D通信; 和 /或,
如果所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所 述测量结果包括信号强度和 /或信号质量, 且如果所述第一终端对所述小区的 信号的测量结果表明测量结果最好的小区的测量结果低于设定的门限,或者, 对所述小区的信号的测量结果表明全部小区的测量结果低于设定的门限时, 则确定开启所述 D2D通信。
结合第五方面或第五方面的任一种可能的实现方式, 在第五方面的第五 种可能的实现方式中, 所述处理器还用于, 确定是否开启 D2D通信之前, 检 测所述第一终端的用户身份模块, 并确定能够检测到所述用户身份模块。 结合第五方面或第五方面的第一种至第四种任一种可能的实现方式, 在 第五方面的第六种可能的实现方式中,
所述处理器包括非接入 NAS层实体、 无线资源控制 RRC层实体、 和应 用层实体;
所述 NAS层实体, 用于生成 D2D开启请求; 所述 RRC层实体, 用于接 收到 NAS层实体发送的 D2D开启请求后, 获取所述网络信息; 或者,
所述应用层实体, 用于生成 D2D开启请求; 所述 RRC层实体, 用于接 收到应用层实体发送的 D2D开启请求后, 获取所述网络信息。
结合第五方面的第六种可能的实现方式, 在第五方面的第七种可能的实 现方式中, 所述 RRC层实体还用于, 如果确定禁止开启所述 D2D通信且如 果所述 D2D开启请求为所述 NAS层实体发送的, 向所述 NAS层实体发送 D2D开启请求否认消息; 所述 NAS层实体还用于,禁止开启所述 D2D通信; 或者,
所述 RRC层实体还用于, 如果确定禁止开启所述 D2D通信且如果所述 D2D开启请求为所述应用层实体发送的,向所述应用层实体发送 D2D开启请 求否认消息, 所述应用层实体禁止开启所述 D2D通信; 或者,
所述 RRC层实体还用于, 如果确定禁止开启所述 D2D通信后, 禁止所 述开启所述 D2D通信。
结合第五方面的第六种或第七种可能的实现方式, 在第五方面的第八种 可能的实现方式中,
所述 RRC层实体还用于, 如果确定开启所述 D2D通信且如果所述 D2D 开启请求为所述 NAS层实体发送的, 向所述 NAS层实体发送 D2D开启请求 确认消息, 所述 NAS层实体还用于, 触发开启所述 D2D通信; 或者,
所述 RRC层实体还用于, 如果确定开启所述 D2D通信且如果所述 D2D 开启请求为所述应用层实体发送的,向所述应用层实体发送 D2D开启请求确 认消息; 所述应用实体层还用于, 触发开启所述 D2D通信; 或者,
所述 RRC层实体还用于, 如果确定开启所述 D2D通信, 触发开启所述 D2D通信。
第六方面, 提供了一种网络设备, 包括: 处理器, 用于生成第一信号, 所述第一信号包括系统消息或者检测信号; 发送器, 用于向第一终端发送所述处理器生成的所述第一信号, 用于使 所述第一终端根据所述第一信号确定是否开启设备到设备 D2D通信,并在确 定开启所述 D2D通信后, 开启自主发现第二终端的所述 D2D通信, 自主发 现所述第二终端, 以便所述第一终端与第二终端直接进行所述 D2D通信。
结合第六方面, 在第六方面的第一种可能的实现方式中, 如果所述第一 信号包括系统消息;
所述发送器发送的所述系统消息中携带禁止所述 D2D通信的指示信息, 或者, 如下项均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预 警信息、 以及所述 D2D通信的资源信息, 用于使所述第一终端根据所述系统 消息确定禁止开启所述 D2D通信; 或者,
所述发送器发送的所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指示信息, 所述 D2D通信的资源信息, 以及预警信息, 用于使所 述第一终端根据所述系统消息确定开启所述 D2D通信。
结合第六方面的第一种可能的实现方式, 在第六方面的第二种可能的实 现方式中, 所述发送器发送的所述系统消息中包含的所述预警信息包括: 海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。 结合第六方面, 在第六方面的第三种可能的实现方式中, 所述发送器发 送的所述第一信号包括检测信号, 用于使所述第一终端应用所述检测信号进 行小区发现或者测量所述检测信号, 并根据小区发现结果确定是否开启所述 D2D通信, 或者根据对所述检测信号的测量结果确定是否开启所述 D2D通 信。
通过上述技术方案, 终端根据网络信息确定是否开启 D2D通信, 可以实 现网络可控; 通过在 D2D通信时终端之间直接进行通信, 可以解决灾难时基 站不可用引起的问题, 满足公共安全场景的需求。 因此, 达到既满足网络可 控又能够应用在公共安全场景下。 附图说明 为了更清楚地说明本发明实施例中的技术方案, 下面将对实施例描述中 所需要使用的附图作一简单地介绍, 显而易见地, 下面描述中的附图是本发 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性的 前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明 D2D通信方法一实施例的流程示意图;
图 2为本发明 D2D通信方法另一实施例的流程示意图;
图 3为本发明 D2D通信方法另一实施例的流程示意图;
图 4为本发明实施例中 D2D通信结构示意图;
图 5为本发明 D2D通信方法另一实施例的流程示意图;
图 6为本发明 D2D通信方法另一实施例的流程示意图;
图 7为本发明实施例中 D2D通信结构示意图;
图 8为本发明终端一实施例的结构示意图;
图 9a为本发明终端另一实施例的结构示意图;
图 9b为本发明终端另一实施例的结构示意图;
图 10为本发明网络设备一实施例的结构示意图;
图 11为本发明网络设备另一实施例的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 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 得的所有其他实施例, 都属于本发明保护的范围。
应理解, 本发明实施例的技术方案可以应用于各种通信系统, 例如: 全 球移动通讯( Global System of Mobile communication, 简称为 "GSM" )系统、 码分多址(Code Division Multiple Access, 简称为 "CDMA" ) 系统、 宽带码 分多址( Wideband Code Division Multiple Access, 简称为 "WCDMA" )系统、 通用分组无线业务(General Packet Radio Service, 简称为 "GPRS" )、 长期演 进( Long Term Evolution, 简称为 "LTE" ) 系统、 LTE频分双工 (Frequency Division Duplex,简称为 "FDD" )系统、 LTE时分双工( Time Division Duplex, 简称为 "TDD" )、 通用移动通信系统 (Universal Mobile Telecommunication System,简称为 "UMTS" )或全球互联微波接入( Worldwide Interoperability for Microwave Access, 简称为 "WiMAX" )通信系统等。
还应理解,在本发明实施例中,用户设备(User Equipment,简称为 "UE" ) 可称之为终端 (Terminal ), 移动台 (Mobile Station, 简称为 "MS" )或移动 终端 (Mobile Terminal )等, 该用户设备可以经无线接入网 (Radio Access Network, 简称为 "RAN" )与一个或多个核心网进行通信, 例如, 用户设备 可以是移动电话(或称为 "蜂窝" 电话)或具有移动终端的计算机等, 例如, 用户设备还可以是便携式、 袖珍式、 手持式或计算机内置的或者车载的移动 装置, 它们与无线接入网交换语音和 /或数据。
在本发明实施例中, 网络设备可以为基站、 接入点 ( Access Point, 简称 为 "AP" )、 远端无线设备(Remote Radio Equipment, 简称为 "RRE" )、 远端 射频头(Remote Radio Head, 简称为 "RRH" )、 远端无线单元( Remote Radio Unit, 简称为 "RRU" )或中继节点 (Relay Node, 简称为 "RN" )等。 基站 可以是 GSM或 CDMA中的基站( Base Transceiver Station, 简称为 "BTS" ), 也可以是 WCDMA中的基站(NodeB, 简称为 "NB" ), 还可以是 LTE中的 演进型基站(evolved Node B, 简称为 "ENB或 e-NodeB" )。 还应理解, 在本 发明实施例中, 网络设备还可以是具有调度功能的其它设备, 例如具有调度 功能的 UE等, 本发明实施例并不以此为限。
图 1为本发明 D2D通信方法一实施例的流程示意图, 包括:
11 : 第一终端获取网络信息, 所述网络信息包括小区覆盖结果和 /或网络 设备发送的系统消息;
该系统消息可以为系统消息( System Information , SI ), 该系统消息携带 终端进行小区选择或重选、 接入网络, 发送或者接收数据等的参数。
在不同的网络系统中, 终端可以有不同的称呼, 本发明实施例以用户设 备 ( User Equipment, UE ) 为例。
可选的, UE可以采用如下方式获取网络信息:
UE发现一个小区, 接收该小区发送的系统消息; 其中, 系统消息可以是 由基站广播的; 或者,
UE获取小区的覆盖结果, 所述覆盖结果可以为 UE对小区的发现结果, 或者为对小区的信号的测量结果。
12: 所述第一终端根据所述网络信息, 确定是否开启自主发现第二终端 的 D2D通信 (下文简称为 D2D通信);
一种实施例中,如果网络信息为系统消息, UE可以根据系统消息中携带 的信息确定是否开启。
其中, 系统消息中携带的信息可以是用于指示禁止或开启的指示信息, 当系统消息中携带禁止 D2D通信指示信息时,终端可以根据该系统消息确定 禁止开启 D2D通信, 当系统消息中携带允许 D2D通信指示信息时, 终端可 以根据该系统消息确定允许开启 D2D通信。 或者,
系统消息中携带的信息可以是预警信息, 该预警信息可以包括地震及海 1 ^预警系统 ( Earthquake and Tsunami Warning System, ETWS )信息和 /或商 业移动预警系统( Commercial Mobile Alert System, CMAS )信息, 当系统消 息中携带预警信息时, 终端可以根据该系统消息确定允许开启 D2D通信。
或者, 系统消息中携带的信息也可以是用于 D2D通信的资源信息, 当系 统消息中携带用于 D2D通信的资源信息时,终端可以根据该系统消息确定允 许开启 D2D通信。 或者,
系统消息中可以携带其余信息,该其余信息不包含允许 D2D通信的指示 信息、 上述预警信息和用于 D2D通信的资源信息, 此时, 终端可以根据该系 统消息确定禁止开启 D2D通信。 本实施例中, 通过获取系统消息中携带的信 息从而实现网络对 D2D通信的控制, 即网络可控。
一种实施例中, 如果网络信息为小区覆盖结果, 小区覆盖结果用于表明 UE是否处于覆盖漏洞处, 包括 UE对小区的发现结果, 或者为对小区的信号 的测量结果。 例如, 当 UE在所有支持的频点上都不能发现一个小区, 则可 以表明 UE处于覆盖漏洞处, 之后可以确定开启 D2D通信, 具体的, 所述发 现一个小区是指 UE能够获得该小区的标识并与该小区同步。 或者, UE在所 有支持的频点上发现的小区中, 对小区的信号的测量结果表明测量结果最好 的小区的测量结果低于设定的门限, 或者, 对小区的信号的测量结果表明全 部小区的测量结果低于设定的门限时, 确定开启 D2D通信, 所述测量结果包 括信号强度和 /或信号质量。进一步地, UE对小区的发现结果可以是 UE通过 测量基站发送的检测信号获取对基站对应的小区的发现结果。 本实施例中, UE可以通过测量基站发送的测量信号,从而获取小区覆盖结果, 而基站通过 发送测量信号实现网络对 D2D通信的控制, 即网络可控。 进一步地, UE对小区的发现结果可以是 UE通过测量基站发送的检测信 号获取对基站对应的小区的发现结果。
又一实施例中, 如果网络信息为小区覆盖结果, 且所述发现结果表明第 一终端能够发现小区或所述第一终端对所述小区的信号的测量结果表明测量 结果最好的小区的测量结果高于设定的门限, 或者, 对所述小区的信号的测 量结果表明至少一个小区的测量结果高于设定的门限, 则所述 UE进一步获 取系统消息, 根据系统消息的指示确定是否开启 D2D通信, 如上述实施例中 所述。 本实施例中, UE可以通过测量基站发送的测量信号, 从而获取小区覆 盖结果,而基站通过发送测量信号实现网络对 D2D通信的控制,即网络可控。
又一实施例中, 网络信息包括系统消息和小区覆盖结果, 则如果所述第 一终端对小区的发现结果表明第一终端能够发现小区, 即, 第一终端处于小 区覆盖内, 则所述第一终端根据所述系统消息确定是否开启所述 D2D通信。
或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果网络信息包括系统消息和小区覆盖 结果, 则所述根据所述网络信息, 确定是否开启 D2D通信, 包括: 如果所述 第一终端对所述小区的信号的测量结果表明测量结果最好的小区的测量结果 高于设定的门限, 或者, 对所述小区的信号的测量结果表明至少一个小区的 测量结果高于设定的门限时, 则所述第一终端根据所述系统消息确定是否开 启所述 D2D通信。
本实施例中, UE可以通过测量基站发送的测量信号,从而获取小区覆盖 结果, 而基站通过发送测量信号实现网络对 D2D通信的控制, 即网络可控。
13: 如果所述第一终端确定开启所述 D2D通信, 所述第一终端自主发现 所述第二终端, 并与所述第二终端直接进行所述 D2D通信。
所述第一终端与第二终端直接进行所述 D2D通信也可以称为该 D2D通信 不依赖网络和 /或能够用于公共安全场景, 或者称为纯 D2D通信(pure D2D ), 或者称为直接 D2D通信。 具体是指信号不经过基站, 或者说通信链路的建立 不需要基站参与, 终端之间可以自行进行邻居发现(即自主发现第二终端)、 以及自行进行通信资源协商等。
该 D2D通信可以是单向的, 比如一个终端发射一个信号, 另一个终端检 测。 具体的, 比如救灾时, 被困的 UE间歇性的发射 D2D信号作为生命信号特 征, 帮助救援人员寻找。 或者,
所述 D2D通信过程还可以是双向的, 具体可以包括以下步骤:
第一步, UE之间进行同步;
第二步, UE在选择的资源上进行发现, 假设第一 UE发现了第二 UE; 第三步, 第一 UE寻呼第二 UE , 第二 UE给发送寻呼消息的第一 UE回 复响应消息;
第四步, 经过寻呼过程的 UE相互发送数据, 也就是第一 UE和第二 UE 相互发送数据。
可选地, 上述实施例中, 所述第一终端根据所述网络信息, 确定是否开 启自主发现第二终端的 D2D通信之前, 还可以包括: 所述第一终端检测所述 终端的用户身份模块, 并确定能够检测到所述用户身份模块。 这样, 可以防 止某些用户故意拔出用户身份模块以欺骗网络,私自使用 D2D通信引起的问 题。
相应的, 参见图 2, 网络侧可以执行如下步骤:
21 : 网络设备生成第一信号, 所述第一信号为系统消息或者检测信号; 22: 所述网络设备向终端发送所述第一信号, 所述第一信号用于使所述 终端根据所述第一信号确定是否开启自主发现第二终端的 D2D通信,并在确 定开启 D2D 通信后, 自主发现所述第二终端, 并与第二终端直接进行所述 D2D通信。
其中, 网络设备可以为基站, 例如演进基站 (evoleved NodeB, eNB )。 系统消息中携带的信息可以参见上述对终端侧的描述。
检测信号可以是指基站发送给终端用于小区发现或者信号测量的信号, 例如, 主同步信号 (Primary Synchronization Signal , PSS )、 辅同步信号 ( Secondary Synchronization Signal, SSS )、 小区专用参考信号 ( Cell-specific
Reference Signal, CRS )、 信道状态信息参考信号 ( Channel Status Information
Reference Signal, CSI-RS ), 或者可以为其他任何可以用于发现或者测量用的 信号。
本实施例通过网络信息确定是否开启 D2D通信, 可以实现网络可控, 保 证运营商利益; 另外, 在 D2D通信时采用终端之间直接进行通信, 也就是说 终端在确定开启 D2D通信后, 终端之间可以自行进行邻居发现 (自主发现第 二终端)、 通信资源协商等, 不再需要网络指示发现资源以及通信资源, 可以 解决灾难场景下基站不能提供支持的问题,使得 D2D通信在公共安全场景下 依然适用, 满足及时救援的需求。
在本发明另一实施例中, UE也可以检测自身的用户身份模块检测结果, 如果不能检测到所述用户身份模块, 所述 UE确定禁止 D2D通信。
其中, 用户身份模块可以包括用户身份模块( Subcriber Identity Module , SIM ), 用户身份模块( User Identity Module , UIM ) , 或者, 全球用户身份模 块(Universal Subscriber Identity Module, USIM ), 例如 UE可以获知该 UE 是否有 SIM卡
本实施例在 UE内检测不到用户身份模块时禁止 D2D通信, 可以防止某 些用户故意拔出用户身份模块以欺骗网络, 私自使用 D2D通信引起的问题。
图 3为本发明 D2D通信方法另一实施例的流程示意图, 包括:
31 : UE的非接入(Non Access Stratum, NAS )层或应用层向无线资源 控制 (Radio Resource Control, RRC )层发送 D2D开启请求。
32: RRC层收到 D2D开启请求后,如果可以接收到小区发送的系统消息,
RRC层根据系统消息确定是否开启 D2D通信, 若是, 执行 33 , 否则执行 34。
其中, 该系统消息可以是 UE通过执行小区选择流程获取的, UE执行的 小区选择流程可以包括:
首先, UE通过搜索同步信道来获得小区标识以及与小区同步;
其次, UE测量小区参考信号以及读取小区的系统消息,
在该流程中如果 UE发现如下任一种小区,就表明 UE可以接收到该小区 的系统消息。
( 1 ) 发现一个合适( suitable ) 小区并驻留:
在小区满足如下条件时表明发现了一个合适小区:
该小区广播的系统消息中携带的公共陆地移动网络(Public Land Mobile Network, PLMN )信息指示的 PLMN为 UE选择的 PLMN, 或者为 UE注册 的 PLMN, 或者位于 UE的同等 PLMN列表中;
对于一封闭用户组( Closed Subscriber Grou , CSG ) 的小区, 该小区广 播的系统消息中携带的 CSG ID在 UE的 CSG白名单中; 该小区没有被禁止;
该小区所属的跟踪区域(Tracking Area, TA ) 不属于禁止漫游的跟踪区 域;
该小区的信号满足小区选择的准则。 所述小区信号满足小区选择的准则 包括小区的信号强度和 /或小区的信号质量满足小区选择准则。
( 2 )发现一个可接受的小区:
当 UE不能发现一个满足上述条件的合适小区驻留, 但是可以发现一个 小区获得受限制服务, 如如下项的至少一项, 紧急呼叫, ETWS, CMAS, 则 该小区称为可接受的小区, 可接受的小区应该满足下列两个条件:
该小区没有被禁止;
该小区的信号质量满足小区选择的准则。
( 3 )发现一个预留的小区;
其中,小区发送的系统消息中会携带用于指示小区是预留的小区的信息, UE可以根据该信息确定小区是否为预留的小区。
所述预留的小区可以是指留给运营商测试人员, 其他人员不能接入。
( 4 )发现一个禁止的小区;
其中,小区发送的系统消息中会携带用于指示小区是禁止的小区的信息, UE可以根据该信息确定小区是否为禁止的小区。
所述禁止的小区可以是指在网络部署或者优化阶段, 将小区设为禁止的 小区, 所有 UE不能接入, 因为即使接入也不能获取服务。
其中, 当系统消息中携带如下任一项信息时, 表明不能开启 D2D通信: 携带禁止 D2D通信指示信息; 或者,
不携带禁止指示信息, 只广播不包含允许 D2D通信的指示信息、 ETWS 信息、 CMS A信息和 D2D通信的资源信息的系统消息。
当系统消息中携带如下至少一种信息时, 表明能够开启 D2D通信: 携带允许 D2D通信指示信息;
携带预警信息, 该预警信息包括 ETWS信息和 /或 CMAS信息; 携带用于 D2D通信的资源信息, 该资源信息可以为子帧、 频域资源块或 者时频资源块。 其中, 可以在携带资源信息的同时携带用于 D2D通信的指示 信息, 或者, 也可以预先约定哪些资源信息是用于 D2D通信的资源信息, 在 系统消息中携带这些预先约定的资源信息时, UE可以确定开启 D2D通信。 可以理解的是, 当根据上述至少一种信息确定开启 D2D通信后,该 D2D 通信所需要的资源信息可以是上述由系统消息中携带的资源信息, 也可以是 通信双方预先约定的资源信息而不需要携带在系统消息中。
33: RRC层向 NAS层或应用层发送 D2D开启请求确认消息, 由 NAS 层或者应用层或者 RRC层触发所述 UE开启 D2D通信或者在 D2D通信资源 上开启 D2D通信。
如图 4所示, 右侧的 UE可以在根据系统消息确定开启 D2D通信后, 发 现邻近的 UE, 如左侧的位于毁坏的基站覆盖范围内的 UE, 之后两个 UE可 以进行纯 D2D通信, 以便对左侧的 UE进行及时丈援。
可选的, 当由 RRC层触发 UE开启 D2D通信或者在 D2D通信资源上开 消息。
34: RRC层向 NAS层或应用层发送 D2D开启请求否认消息, 由 NAS 层或者应用层或者 RRC层禁止所述 UE开启 D2D通信。
其中, 33和 34中的 D2D通信是所述终端之间直接进行通信,该 D2D通 信不依赖网络和 /或能够用于公共安全场景, 可以称为不依赖网络的 D2D 通 信或纯 D2D通信。
可选的 ,当由 RRC层禁止 UE开启 D2D通信时 , RRC层也可以不向 NAS 层或应用层发送 D2D开启请求否认消息。
另外, 当 RRC层不能接收到系统消息时, 可以进一步获取小区的覆盖结 果, 具体内容可以参见后续实施例。
本实施例通过基站向 UE发送系统消息, UE根据该系统消息确定是否开 启 D2D通信 , 实现由网络可控 , 并且 UE在确定 D2D通信后进行纯 D2D通 信, 不再依赖网络, 可以将 D2D通信应用在灾难场景。
图 5为本发明 D2D通信方法另一实施例的流程示意图, 包括:
51 : UE的 NAS层或应用层向 UE的 RRC层发送 D2D开启请求。
52: RRC层收到 D2D开启请求后, 如果 UE内不存在 SIM卡, RRC层 向 NAS层或应用层发送 D2D开启请求否认消息, 由 NAS层或者应用层或者
RRC层禁止所述 UE开启 D2D通信。 可选的 ,当由 RRC层禁止 UE开启 D2D通信时 , RRC层也可以不向 NAS 层或应用层发送 D2D开启请求否认消息。
本实施例以用户身份模块为 SIM卡为例, 可以理解的是, 该用户身份模 块也可以为 UIM、 USIM等。
该 D2D通信是终端之间直接进行通信, 不依赖网络和 /或能够用于公共 安全场景, 可以称为不依赖网络的 D2D通信或纯 D2D通信。
另外, 当 UE中存在 SIM卡时可以根据是否接收到系统消息, 以及根据 系统消息中的指示信息开启或禁止纯 D2D通信。
本实施例在 UE内没有 SIM卡时禁止 D2D通信,可以防止某些用户故意 拔出 SIM卡以欺骗网络, 私自使用 D2D通信引起的问题。
图 6为本发明 D2D通信方法另一实施例的流程示意图, 包括:
61 : UE的 NAS层或应用层向 RRC层发送 D2D开启请求。
62: RRC层收到 D2D开启请求后, 获取小区的覆盖结果, 如果覆盖结果 表明 UE处于覆盖漏洞处, RRC层向 NAS层或应用层发送 D2D开启请求确 认消息, 由 NAS层或者应用层或者 RRC层触发所述 UE开启 D2D通信。
可选的,当由 RRC层触发 UE开启 D2D通信时, RRC层也可以不向 NAS 层或应用层发送 D2D开启请求确认消息。
该 D2D通信是述终端之间直接进行通信, 不依赖网络和 /或能够用于公 共安全场景, 可以称为不依赖网络的 D2D通信或纯 D2D通信。 其中, 当满 足如下条件时, 表明 UE处于覆盖漏洞处:
覆盖结果为 UE对小区的发现结果,此时, 当 UE在所有支持的频点上都 不能发现一个小区, 就表明 UE处于覆盖漏洞处。 具体的, 所述发现一个小 区为 UE获得该小区的标识并与该小区同步。 或者,
覆盖结果为 UE对小区的信号的测量结果,此时, 当 UE在所有支持的频 点上发现的小区中, 信号质量最好的小区或者全部小区的信号质量低于设定 的门限, 就表明 UE处于覆盖漏洞处。 可选的, 上述的 "信号质量" 可以替 换为 "信号强度" 或者两种结合即测量的是信号质量和信号强度。 具体的, 信号强度和 /或信号质量最好的小区或者全部小区的信号强度和 /或信号质量 低于设定的门限包括两种测量方法:
RRC 层通过测量小区的信号发现小区的信号强度和 /或信号质量低于设 定的门限; 或者,
物理层通过测量小区的信号发现小区的物理层测量值低于设定的门限, 该测量值为信号强度和 /或信号质量, 物理层向 RRC层发送一个指示, 该指 示用于通知 RRC层 UE处于基站的覆盖漏洞处。
其中, 小区的信号可以为小区专用参考信号( Cell-specific Reference Signal, CRS ) ,还可以为信道状态信息参考信号( Channel Status Information Reference Signal, CSI-RS ) , 或者可以为其他任何可以用于测量用的参考信号。 信号强 度可以为参考信号接收功率(Reference Signal Receiving Power, RSRP, 信号 质量可以为参考信号接收质量( Reference Signal Receiving Quality, RSRQ ) 。
如图 7所示, 左侧的位于毁坏的基站覆盖范围内的 UE, 通过测量发现自 己处于覆盖漏洞处后, 就可以与右侧的 UE进行纯 D2D通信, 以保证自身被 及时救援。
另外, 当 UE没有处于覆盖漏洞处时, 可以根据系统消息或 SIM卡情况 开启或禁止不依赖网络的 D2D通信, 具体内容可以参见上述实施例。
本实施例通过小区覆盖结果, 可以在灾难场景下保证自身及时被救援。 图 8为本发明终端一实施例的结构示意图,该终端可以具体为第一终端, 该终端 80包括获取模块 81、 确定模块 82和通信模块 83; 获取模块 81所述 网络信息包括: 小区覆盖结果和 /或网络设备发送的系统消息; 确定模块 82 用于根据所述获取模块 81获取的所述网络信息,确定是否开启自主发现第二 终端的 D2D通信; 通信模块 83用于在所述确定模块 82确定开启所述 D2D 通信后, 自主发现所述第二终端,并与所述第二终端直接进行所述 D2D通信。
可选的, 如果所述网络信息包括系统消息, 所述确定模块 82具体用于按 如下方式确定是否开启设备到设备 D2D通信:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 确定开启所述 D2D通 信。
可选地, 所述小区覆盖结果包括所述第一终端对小区的发现结果; 如果 所述网络信息还包括所述小区覆盖结果,所述确定模块 82具体用于按如下方 式根据所述网络信息确定是否开启 D2D通信:如果所述第一终端对小区的发 现结果表明所述第一终端能够发现所述小区, 根据所述系统消息确定是否开 启所述 D2D通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果所述网络信息还包括所述小区覆盖 结果,所述确定模块 82具体用于按如下方式根据所述网络信息确定是否开启 D2D通信: 如果所述测量结果表明测量结果最好的小区的测量结果高于设定 的门限, 或者, 所述测量结果表明至少一个小区的测量结果高于设定的门限 时, 根据所述系统消息确定是否开启所述 D2D通信。
可选的,所述获取模块 81获取的所述系统消息所包含的所述预警信息包 括: ETWS信息, 和 /或, CMSA信息。
可选的, 如果所述网络信息包括小区覆盖结果, 所述确定模块 82具体用 于: 按如下方式确定是否开启设备到设备 D2D通信:
如果所述小区覆盖结果包括所述第一终端对小区的发现结果, 如果所述 第一终端对小区的发现结果表明所述第一终端在所有支持的频点上都不能发 现所述小区, 则确定开启所述 D2D通信; 和 /或,
如果所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所 述测量结果包括信号强度和 /或信号质量, 如果所述第一终端对小区的信号的 测量结果表明测量结果最好的小区的测量结果低于设定的门限, 或者, 对所 述小区的信号的测量结果表明全部小区的测量结果低于设定的门限时, 则确 定开启所述 D2D通信。
可选地, 所述确定模块 82还用于, 确定是否开启 D2D通信之前, 检测 所述第一终端的用户身份模块, 并且确定能够检测到所述用户身份模块。
可选的, 所述终端还包括: RRC实体模块, 其中, 所述 RRC实体模块 包括所述获取模块 81 ; 以及
NAS实体模块, 用于生成 D2D开启请求; 其中, 所述获取模块 81具体 用于按如下方式获取网络信息: 接收所述 NAS实体模块生成的 D2D开启请 求后, 获取所述网络信息; 或者 应用层实体模块, 用于生成 D2D开启请求; 其中, 所述获取模块 81具 体用于按如下方式获取网络信息:接收所述应用层实体模块生成的 D2D开启 请求后, 获取所述网络信息。
可选地, 所述 RRC实体模块还包括所述确定模块;
所述确定模块 82具体用于确定开启所述 D2D通信后, 禁止所述通信模 块 83开启 D2D通信。
或者
所述确定模块 82还用于:
如果所述确定模块 82确定禁止开启所述 D2D通信且如果所述 D2D开启 请求为所述 NAS实体单元发送的,所述确定模块 82向所述 NAS实体模块发 送 D2D开启请求否认消息;
所述 NAS实体模块还用于, 收到所述 D2D开启请求否认消息后, 禁止 所述通信模块 83开启所述 D2D通信;
或者, 所述确定模块 82还用于:
如果所述确定模块 82确定禁止开启所述 D2D通信且如果所述 D2D开启 请求为所述应用层实体模块发送的,所述确定模块 82向所述应用层实体模块 发送 D2D开启请求否认消息; 所述应用层实体模块用于收到 D2D开启请求 否认消息后, 禁止所述通信模块 83开启 D2D通信。
所述 RRC实体模块还包括所述确定模块 82;
所述确定模块 82具体用于确定开启所述 D2D通信后, 触发所述通信模 块 83开启 D2D通信。
或者
所述确定模块 82还用于,如果所述确定模块 82确定开启所述 D2D通信 且如果所述 D2D开启请求为所述 NAS实体模块发送的,所述确定模块 82向 所述通信模块发送 D2D开启请求确认消息以使所述通信模块 83触发开启所 述 D2D通信; 或者,
所述确定模块 82还用于,如果所述确定模块 82确定开启所述 D2D通信 且如果所述 D2D开启请求为所述应用层实体模块发送的, 所述确定模块 82 向所述通信模块发送 D2D开启请求确认消息, 以使所述通信模块 83触发开 启所述 D2D通信。 在另一实施例中, 所述确定模块用于检测终端的用户身份模块, 确定不 能够检测到所述用户身份模块, 确定禁止通信模块开启所述 D2D通信。 该实 施例可以单独使用, 也可以与上述实施例结合使用。
在硬件实现上, 以上模块可以以硬件形式内嵌于或独立于基站的处理器 中, 也可以以软件形式存储于终端, 如 UE的存储器中, 以便于处理器调用 执行以上各个模块对应的操作。 该处理器可以为中央处理单元(CPU )、 微处 理器、 单片机等。 图 8所示的终端能够执行上述实施例中的相应步骤, 具体 可参见上述实施例的描述。 其所达到的效果也可参见上述实施例所述。
请参考图 9a, 其为本发明实施例所提供的一种终端的结构示意图。 如图 所示, 该终端 90包括收发器 91和处理器 92。 当然, 终端还可以包括存储器、 天线、 基带处理部件、 中射频处理部件、 输入输出装置等通用部件, 本发明 实施例在此不再任何限制。
处理器 92, 用于获取网络信息, 所述网络信息包括小区覆盖结果和 /或网 络设备发送的系统消息; 以及, 用于根据所述网络信息, 确定是否开启自主 发现第二终端的 D2D通信; 以及, 在确定开启所述 D2D通信后, 开启所述 D2D通信, 自主发现所述第二终端,并控制收发器 91与所述第二终端直接进 行所述 D2D通信;
所述收发器 91 , 用于在所述处理器 92的控制下与所述第二终端直接进 行所述 D2D通信。
可选的, 如果所述网络信息包括所述系统消息, 所述处理器 92具体用于 按如下方式确定是否开启 D2D通信:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 则确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 则确定开启所述 D2D 通信。
可选地, 所述小区覆盖结果包括所述第一终端对小区的发现结果; 如果 所述网络信息还包括所述小区覆盖结果,所述处理器 92具体用于按如下方式 根据所述网络信息确定是否开启 D2D通信: 如果所述发现结果表明所述第一 终端能够发现所述小区, 根据所述系统消息确定是否开启所述 D2D通信; 和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果所述网络信息还包括所述小区覆盖 结果, 所述处理器 92 具体用于按如下方式根据所述网络信息确定是否开启 D2D通信: 如果所述第一终端对所述小区的信号的测量结果表明测量结果最 好的小区的测量结果高于设定的门限, 或者, 对所述小区的信号的测量结果 表明至少一个小区的测量结果高于设定的门限时, 根据所述系统消息确定是 否开启所述 D2D通信。
可选的, 所述处理器 92获取的所述预警信息包括:
海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息 可选的, 如果所述网络信息包括所述小区覆盖结果, 所述处理器 92具体 用于按如下方式确定是否开启 D2D通信:
如果所述小区覆盖结果包括所述第一终端对小区的发现结果且所述第一 终端对小区的发现结果表明所述第一终端在所有支持的频点上都不能发现所 述小区, 则确定开启所述 D2D通信; 和 /或,
如果所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所 述测量结果包括信号强度和 /或信号质量, 且如果所述第一终端对所述小区的 信号的测量结果表明测量结果最好的小区的测量结果低于设定的门限,或者, 对所述小区的信号的测量结果表明全部小区的测量结果低于设定的门限时, 则确定开启所述 D2D通信。
可选的, 所述处理器 92还用于, 确定是否开启 D2D通信之前, 检测所 述第一终端的用户身份模块, 并确定能够检测到所述用户身份模块。
可选的, 如图 9b所示, 所述处理器 92包括 NAS层实体 921、 RRC层实 体 922、 和应用层实体 923;
所述 NAS层实体 921 , 用于生成 D2D开启请求; 所述 RRC层实体 922, 用于接收到 NAS层实体 921发送的 D2D开启请求后, 获取所述网络信息; 或者,
所述应用层实体 923 , 用于生成 D2D开启请求; 所述 RRC层实体 922, 用于接收到应用层实体发送的 D2D开启请求后, 获取所述网络信息。 可选的, 所述 RRC层实体 922还用于, 如果确定禁止开启所述 D2D通 信且如果所述 D2D开启请求为所述 NAS层实体发送的,向所述 NAS层实体 921发送 D2D开启请求否认消息; 所述 NAS层实体还用于, 禁止开启所述 D2D通信; 或者,
所述 RRC层 922实体还用于, 如果确定禁止开启所述 D2D通信且如果 所述 D2D开启请求为所述应用层实体发送的, 向所述应用层实体 923发送 D2D开启请求否认消息,所述应用层实体 923禁止开启所述 D2D通信;或者, 所述 RRC层实体 922还用于, 如果确定禁止开启所述 D2D通信后, 禁 止所述开启所述 D2D通信。
可选的, 所述 RRC层实体 922还用于, 如果确定开启所述 D2D通信且 如果所述 D2D开启请求为所述 NAS层实体 921发送的, 向所述 NAS层实体 921发送 D2D开启请求确认消息,所述 NAS层实体 921还用于,触发开启所 述 D2D通信; 或者,
所述 RRC层实体 922还用于, 如果确定开启所述 D2D通信且如果所述 D2D开启请求为所述应用层实体 923发送的,向所述应用层实体 923发送 D2D 开启请求确认消息; 所述应用实体层 923还用于, 触发开启所述 D2D通信; 或者,
所述 RRC层实体 922还用于, 如果确定开启所述 D2D通信, 触发开启 所述 D2D通信。
需要说明的是, 图 8和图 9a以及图 9b所示的设备可以用于实现以上方 法实施例中关于终端所提供的任一种方法, 且关于网络信息及其获取方式、 D2D通信等的描述同以上方法实施例, 在此不再贅述。
本实施例通过根据网络信息确定是否开启 D2D通信,可以实现网络可控, 保证运营商利益; 另外, 在 D2D通信时采用终端之间直接通信, 可以解决灾 难场景下基站不能提供支持的问题, 使得 D2D通信在公共场景下依然适用, 满足及时救援的需求。
图 10为本发明网络设备一实施例的结构示意图,该网络设备 100包括生 成模块 101和发送模块 102; 生成模块 101用于生成第一信号, 所述第一信 号包括系统消息或者检测信号; 发送模块 102用于向第一终端发送所述生成 模块生成的所述第一信号, 用于使所述第一终端根据所述第一信号确定是否 开启设备到设备 D2D通信, 并在确定开启所述 D2D通信后, 开启所述 D2D 通信, 自主发现第二终端, 并与所述第二终端直接进行所述 D2D通信。
可选的, 如果所述生成模块生成的所述第一信号包括系统消息, 则所述系统消息中携带禁止所述 D2D通信的指示信息, 或者, 如下项均 不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及所 述 D2D通信的资源信息,用于使所述第一终端根据所述系统消息确定禁止开 启所述 D2D通信; 或者,
则所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指示 信息, 所述 D2D通信的资源信息、 以及预警信息, 用于使所述第一终端根据 所述系统消息确定开启所述 D2D通信。
可选的,所述生成模块生成的所述系统消息中包含的所述预警信息包括:
ETWS信息, 和 /或, CMSA信息。
可选的, 所述生成模块生成的所述第一信号包括检测信号, 用于使所述 第一终端应用所述检测信号进行小区发现或者测量所述检测信号, 并根据小 区发现结果确定是否开启所述 D2D通信,或者根据对所述检测信号的测量结 果确定是否开启所述 D2D通信。
在硬件实现上, 以上发送模块可以为发射机或收发机, 对应于硬件实现 为收发机。 以上生成模块可以以硬件形式内嵌于或独立于基站的处理器中, 也可以以软件形式存储于网络设备, 如基站的存储器中, 以便于处理器调用 执行以上各个模块对应的操作。 该处理器可以为中央处理单元(CPU )、 微处 理器、 单片机等。
请参考图 11 , 其为本发明实施例所提供的一种网络设备的结构示意图。 如图所示, 该网络设备 110包括处理器 111和发送器 112。 当然, 网络设备还 可以包括存储器、 接收器、 天线、 基带处理部件、 中射频处理部件、 输入输 出装置等通用部件, 发送器和接收器可以合成在一起作为收发器, 本发明实 施例在此不再任何限制。
处理器 111用于生成第一信号, 所述第一信号包括系统消息或者检测信 号; 发送器 112用于向第一终端发送所述处理器生成的所述第一信号, 用于 使所述第一终端根据所述第一信号确定是否开启设备到设备 D2D通信,并在 确定开启所述 D2D通信后, 开启自主发现第二终端的所述 D2D通信, 自主 发现所述第二终端, 以便所述第一终端与第二终端直接进行所述 D2D通信。 可选的, 所述第一信号包括系统消息;
所述发送器 112发送的所述系统消息中携带禁止所述 D2D通信的指示信 息,或者,如下项均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及所述 D2D通信的资源信息, 用于使所述第一终端根据所述系 统消息确定禁止开启所述 D2D通信; 或者,
所述发送器 112发送的所述系统消息中包含如下项中的至少一项: 允许 所述 D2D通信的指示信息, 所述 D2D通信的资源信息, 以及预警信息, 用 于使所述第一终端根据所述系统消息确定开启所述 D2D通信。
可选的, 所述发送器 112发送的所述系统消息中包含的所述预警信息包 括: ETWS信息, 和 /或, CMSA信息。
可选的, 所述发送器 112发送的所述第一信号包括检测信号, 用于使所 述第一终端应用所述检测信号进行小区发现或者测量所述检测信号, 并根据 小区发现结果确定是否开启所述 D2D通信,或者根据对所述检测信号的测量 结果确定是否开启所述 D2D通信。
需要说明的是, 图 10和图 11所示的设备可以用于实现以上方法实施例 中关于网络设备所提供的任一种方法, 且关于系统消息、 检测信号及其获取 方式、 D2D通信等的描述同以上方法实施例, 在此不再贅述。
本实施例通过根据网络信息确定是否开启 D2D通信,可以实现网络可控, 保证运营商利益; 另外, 在 D2D通信时终端之间直接通信, 可以解决灾难场 景下基站不能提供支持的问题, 使得 D2D通信在公共场景下依然适用, 满足 及时救援的需求。
所属领域的技术人员可以清楚地了解到, 为描述的方便和简洁, 仅以上 述各功能模块的划分进行举例说明, 实际应用中, 可以根据需要而将上述功 能分配由不同的功能模块完成,即将装置的内部结构划分成不同的功能模块, 以完成以上描述的全部或者部分功能。 上述描述的系统, 装置和单元的具体 工作过程, 可以参考前述方法实施例中的对应过程, 在此不再贅述。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和 方法, 可以通过其它的方式实现。 例如, 以上所描述的装置实施例仅仅是示 意性的, 例如, 所述模块或单元的划分, 仅仅为一种逻辑功能划分, 实际实 现时可以有另外的划分方式, 例如多个单元或组件可以结合或者可以集成到 另一个系统, 或一些特征可以忽略, 或不执行。 另一点, 所显示或讨论的相 互之间的耦合或直接耦合或通信连接可以是通过一些接口, 装置或单元的间 接耦合或通信连接, 可以是电性, 机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的, 作 为单元显示的部件可以是或者也可以不是物理单元, 即可以位于一个地方, 或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或 者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中, 也可以是各个单元单独物理存在, 也可以两个或两个以上单元集成在一个单 元中。 上述集成的单元既可以采用硬件的形式实现, 也可以采用软件功能单 元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售 或使用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本 申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的 全部或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)或处理器(processor )执行本申请各个实施例所 述方法的全部或部分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读 存储器(ROM, Read-Only Memory ),随机存取存储器(RAM, Random Access Memory )、 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 以上实施例仅用以说明本申请的技术方案, 而非对其限制; 尽管参照前述实施例对本申请进行了详细的说明, 本领域的普通技术人员应 当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其 中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相应技术方案 的本质脱离本申请各实施例技术方案的精神和范围。

Claims

权 利 要求 书
1、 一种设备到设备 D2D通信方法, 其特征在于, 包括:
第一终端获取网络信息, 所述网络信息包括小区覆盖结果和 /或网络设备 发送的系统消息;
所述第一终端根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信; 以及,
如果所述第一终端确定开启所述 D2D通信,所述第一终端自主发现所述 第二终端, 并与所述第二终端直接进行所述 D2D通信。
2、 根据权利要求 1所述的方法, 其特征在于, 如果所述网络信息包括所 述系统消息,所述根据所述网络信息,确定是否开启自主发现第二终端的 D2D 通信, 包括:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 则所述第一终端确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 则所述第一终端确定开 启所述 D2D通信。
3、 根据权利要求 2所述的方法, 其特征在于,
所述小区覆盖结果包括所述第一终端对小区的发现结果;
如果所述网络信息还包括所述小区覆盖结果,则所述根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信, 包括: 如果所述第一终端对小 区的发现结果表明所述第一终端能够发现所述小区, 则所述第一终端根据所 述系统消息确定是否开启所述 D2D通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量;
如果所述网络信息还包括所述小区覆盖结果,则所述根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信, 包括: 如果所述第一终端对所 述小区的信号的测量结果表明测量结果最好的小区的测量结果高于设定的门 限, 或者, 对所述小区的信号的测量结果表明至少一个小区的测量结果高于 设定的门限时,则所述第一终端根据所述系统消息确定是否开启所述 D2D通 信。
4、 根据权利要求 2或 3所述的方法, 其特征在于, 所述预警信息包括: 海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。
5、 根据权利要求 1所述的方法, 其特征在于,
所述小区覆盖结果包括所述第一终端对小区的发现结果;
如果所述网络信息包括所述小区覆盖结果, 所述根据所述网络信息, 确 定是否开启自主发现第二终端的 D2D通信, 包括: 如果所述第一终端对小区 的发现结果表明所述第一终端在所有支持的频点上都不能发现所述小区, 所 述第一终端确定开启所述 D2D通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量;
如果所述网络信息包括所述小区覆盖结果, 所述根据所述网络信息, 确 定是否开启 D2D通信, 包括: 如果所述第一终端对所述小区的信号的测量结 果表明测量结果最好的小区的测量结果低于设定的门限, 或者, 对所述小区 的信号的测量结果表明全部小区的测量结果低于设定的门限时, 所述第一终 端确定开启所述 D2D通信。
6、 根据权利要求 1-5中任一项所述的方法, 其特征在于, 所述第一终端 根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信之前, 所述 方法还包括:
所述第一终端检测所述第一终端的用户身份模块, 并且确定能够检测到 所述用户身份模块。
7、 根据权利要求 1-6中任一项所述的方法, 其特征在于, 所述第一终端 获取网络信息, 包括:
所述第一终端的无线资源控制 RRC 层接收到所述第一终端的非接入 NAS层或应用层发送的 D2D开启请求后, 所述 RRC层获取所述网络信息。
8、 根据权利要求 7所述的方法, 其特征在于,
所述第一终端根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信, 包括:
所述 RRC层根据所述网络信息确定禁止开启所述 D2D通信;
所述 RRC层确定禁止开启所述 D2D通信之后, 所述方法还包括: 如果所述 D2D开启请求为所述 NAS层发送的, 则所述 RRC层向所述 NAS层发送 D2D开启请求否认消息, 所述 NAS层禁止所述第一终端开启所 述 D2D通信, 或者, 如果所述 D2D开启请求为所述应用层发送的, 则所述 RRC层向所述应用层发送 D2D开启请求否认消息,所述应用层禁止所述第一 终端开启所述 D2D通信; 或者,
所述 RRC层禁止所述第一终端开启所述 D2D通信。
9、 根据权利要求 7所述的方法, 其特征在于,
所述第一终端根据所述网络信息, 确定是否开启自主发现第二终端的 D2D通信, 包括:
所述 RRC层根据所述网络信息确定开启所述 D2D通信;
所述第一终端开启所述 D2D通信, 包括:
如果所述 D2D开启请求为所述 NAS层发送的, 则所述 RRC层向所述 NAS层发送 D2D开启请求确认消息, 所述 NAS层触发所述第一终端开启所 述 D2D通信, 或者, 如果所述 D2D开启请求为所述应用层发送的, 则所述 RRC层向所述应用层发送 D2D开启请求确认消息 ,所述应用层触发所述第一 终端开启所述 D2D通信;
或者,
所述 RRC层触发所述第一终端开启所述 D2D通信。
10、 一种设备到设备 D2D通信方法, 其特征在于, 包括:
网络设备生成第一信号, 所述第一信号包括系统消息或者检测信号; 所述网络设备向第一终端发送所述第一信号, 所述第一信号用于使所述 第一终端根据所述第一信号确定是否开启自主发现第二终端的 D2D通信,并 在确定开启所述 D2D通信后, 自主发现所述第二终端, 并与所述第二终端直 接进行所述 D2D通信。
11、 根据权利要求 10所述的方法, 其特征在于, 如果所述第一信号包括 所述系统消息,
则所述系统消息中携带禁止所述 D2D通信的指示信息, 或者, 如下项均 不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及所 述 D2D通信的资源信息,用于使所述第一终端根据所述系统消息确定禁止开 启所述 D2D通信; 或者,
则所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指示 信息, 所述 D2D通信的资源信息、 以及预警信息, 用于使所述第一终端根据 所述系统消息确定开启所述 D2D通信。
12、 根据权利要求 11所述的方法, 其特征在于, 所述预警信息包括: 海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。
13、 根据权利要求 10所述的方法, 其特征在于, 所述第一信号包括检测 信号, 用于使所述第一终端应用所述检测信号进行小区发现或者测量所述检 测信号, 并根据小区发现结果确定是否开启所述 D2D通信, 或者根据对所述 检测信号的测量结果确定是否开启所述 D2D通信。
14、 一种终端, 其特征在于, 所述终端为第一终端, 所述终端包括: 获取模块, 用于获取网络信息, 所述网络信息包括: 小区覆盖结果和 /或 网络设备发送的系统消息;
确定模块, 用于根据所述获取模块获取的所述网络信息, 确定是否开启 自主发现第二终端的设备到设备 D2D通信; 以及,
通信模块, 用于在所述确定模块确定开启所述 D2D通信后, 自主发现第 二终端, 并与第二终端直接进行所述 D2D通信。
15、 根据权利要求 14所述的终端, 其特征在于, 如果所述网络信息包括 所述系统消息, 所述确定模块具体用于按如下方式确定是否开启设备到设备 D2D通信:
如果所述系统消息中包含禁止所述 D2D通信的指示信息, 或者, 如下项 均不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及 所述 D2D通信的资源信息, 则确定禁止开启所述 D2D通信; 或者,
如果所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指 示信息, 所述 D2D通信的资源信息、 以及预警信息, 则确定开启所述 D2D 通信。
16、 根据权利要求 15所述的终端, 其特征在于,
所述小区覆盖结果包括所述第一终端对小区的发现结果; 如果所述网络 信息还包括所述小区覆盖结果, 所述确定模块具体用于按如下方式根据所述 网络信息确定是否开启 D2D通信: 如果所述第一终端对小区的发现结果表明 所述第一终端能够发现所述小区, 根据所述系统消息确定是否开启所述 D2D 通信;
和 /或,
所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所述测 量结果包括信号强度和 /或信号质量; 如果所述网络信息还包括所述小区覆盖 结果, 所述确定模块具体用于按如下方式根据所述网络信息确定是否开启 D2D通信: 如果所述测量结果表明测量结果最好的小区的测量结果高于设定 的门限, 或者, 所述测量结果表明至少一个小区的测量结果高于设定的门限 时, 根据所述系统消息确定是否开启所述 D2D通信。
17、 根据权利要求 15或 16所述的终端, 其特征在于, 所述获取模块获 取的所述系统消息所包含的所述预警信息包括: 海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。
18、 根据权利要求 14所述的终端, 其特征在于, 如果所述网络信息包括 所述小区覆盖结果, 所述确定模块具体用于按如下方式确定是否开启设备到 设备 D2D通信:
如果所述小区覆盖结果包括所述第一终端对小区的发现结果, 并且如果 所述第一终端对小区的发现结果表明所述第一终端在所有支持的频点上都不 能发现所述小区, 则确定开启所述 D2D通信; 和 /或,
如果所述小区覆盖结果包括所述第一终端对小区的信号的测量结果, 所 述测量结果包括信号强度和 /或信号质量, 如果所述第一终端对所述小区的信 号的测量结果表明测量结果最好的小区的测量结果低于设定的门限, 或者, 对所述小区的信号的测量结果表明全部小区的测量结果低于设定的门限时, 则确定开启所述 D2D通信。
19、 根据权利要求 14-18中任一项所述的终端, 其特征在于,
所述确定模块还用于, 确定是否开启 D2D通信之前, 检测所述第一终端 的用户身份模块, 并且确定能够检测到所述用户身份模块。
20、 根据权利要求 14-19中任一项所述的终端, 其特征在于, 还包括: 无线资源控制 RRC实体模块, 其中, 所述 RRC实体模块包括所述获取 模块; 以及
非接入层 NAS实体模块, 用于生成 D2D开启请求; 其中, 所述获取模 块具体用于按如下方式获取网络信息: 接收所述 NAS 实体模块生成的 D2D 开启请求后, 获取所述网络信息; 或者
应用层实体模块, 用于生成 D2D开启请求; 其中, 所述获取模块具体用 于按如下方式获取网络信息:接收所述应用层实体模块生成的 D2D开启请求 后, 获取所述网络信息。
21、 根据权利要求 20所述的终端, 其特征在于, 所述 RRC实体模块还 包括所述确定模块;
所述确定模块还用于:
如果所述确定模块确定禁止开启所述 D2D通信且如果所述 D2D开启请 求为所述 NAS实体单元发送的,所述确定模块向所述 NAS实体模块发送 D2D 开启请求否认消息;
所述 NAS实体模块还用于, 收到所述 D2D开启请求否认消息后, 禁止 所述通信模块开启所述 D2D通信;
或者, 所述确定模块还用于:
如果所述确定模块确定禁止开启所述 D2D通信且如果所述 D2D开启请 求为所述应用层实体模块发送的, 所述确定模块向所述应用层实体模块发送 D2D开启请求否认消息;所述应用层实体模块用于收到 D2D开启请求否认消 息后, 禁止所述通信模块开启 D2D通信。
22、 根据权利要求 20所述的终端, 其特征在于, 所述 RRC实体模块还 包括所述确定模块;
所述确定模块还用于,如果所述确定模块确定开启所述 D2D通信且如果 所述 D2D开启请求为所述 NAS实体模块发送的, 所述确定模块向所述通信 模块发送 D2D开启请求确认消息以使所述通信模块触发开启所述 D2D通信; 或者,
所述确定模块还用于,如果所述确定模块确定开启所述 D2D通信且如果 所述 D2D开启请求为所述应用层实体模块发送的,所述确定模块向所述通信 模块发送 D2D开启请求确认消息, 以使所述通信模块触发开启所述 D2D通 信。
23、 一种网络设备, 其特征在于, 包括:
生成模块, 用于生成第一信号, 所述第一信号包括系统消息或者检测信 号;
发送模块, 用于向第一终端发送所述生成模块生成的所述第一信号, 用 于使所述第一终端根据所述第一信号确定是否开启设备到设备 D2D通信,并 在确定开启所述 D2D通信后, 开启所述 D2D通信, 自主发现第二终端, 并 与所述第二终端直接进行所述 D2D通信。
24、 根据权利要求 23所述的设备, 其特征在于, 如果所述生成模块生成 的所述第一信号包括系统消息,
则所述系统消息中携带禁止所述 D2D通信的指示信息, 或者, 如下项均 不包含在所述系统消息: 允许所述 D2D通信的指示信息、 预警信息、 以及所 述 D2D通信的资源信息,用于使所述第一终端根据所述系统消息确定禁止开 启所述 D2D通信; 或者,
则所述系统消息中包含如下项中的至少一项: 允许所述 D2D通信的指示 信息, 所述 D2D通信的资源信息、 以及预警信息, 用于使所述第一终端根据 所述系统消息确定开启所述 D2D通信。
25、 根据权利要求 24所述的设备, 其特征在于, 所述生成模块生成的所 述系统消息中包含的所述预警信息包括:
海啸预警系统 ETWS信息, 和 /或, 商业移动预警系统 CMSA信息。
26、 根据权利要求 23所述的设备, 其特征在于, 所述生成模块生成的所 述第一信号包括检测信号, 用于使所述第一终端应用所述检测信号进行小区 发现或者测量所述检测信号,并根据小区发现结果确定是否开启所述 D2D通 信, 或者根据对所述检测信号的测量结果确定是否开启所述 D2D通信。
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