WO2015043471A1 - 一种无线链路失败的处理方法及装置 - Google Patents

一种无线链路失败的处理方法及装置 Download PDF

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Publication number
WO2015043471A1
WO2015043471A1 PCT/CN2014/087302 CN2014087302W WO2015043471A1 WO 2015043471 A1 WO2015043471 A1 WO 2015043471A1 CN 2014087302 W CN2014087302 W CN 2014087302W WO 2015043471 A1 WO2015043471 A1 WO 2015043471A1
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WO
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Prior art keywords
link
communication
radio link
base station
link failure
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PCT/CN2014/087302
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English (en)
French (fr)
Inventor
傅婧
赵亚利
许芳丽
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电信科学技术研究院
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Publication of WO2015043471A1 publication Critical patent/WO2015043471A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for processing a radio link failure.
  • the Long Term Evolution (LTE) system adopts a centralized control mode of the network, that is, the uplink and downlink data of the user equipment (User Equipment, UE) are transmitted and received under the control of the network.
  • the communication between the UEs is forwarded and controlled by the network.
  • D2D Device to Device
  • D2D communication is also applicable to public safety UEs.
  • special designated user equipment can directly perform unicast D2D communication or multicast or broadcast D2D communication.
  • the UE1 and/or the UE2 may be in a cellular coverage scenario, that is, in a network scenario, or may not be in a cellular coverage scenario, that is, an off-network scenario;
  • the D2D communication resources may be controlled by the network side, or may be operated in the off-network mode as in the off-network scenario, and the D2D communication resources are not controlled by the network side dynamically or semi-statically.
  • a radio link failure occurs during D2D communication.
  • RLF radio link failure
  • the present invention provides a method and a device for processing a radio link failure, so as to prevent the two UEs performing D2D communication between devices from processing the failure of the radio link when the radio link fails, and ensuring timely D2D communication.
  • the signaling and resource waste are avoided, the power consumption of the UE is saved, and the working efficiency of the device is improved.
  • An embodiment of the present invention provides a method for processing a radio link failure, where the method includes:
  • the radio link failure occurs in the D2D communication between the first user equipment UE and the second UE, determining that the radio link failure needs to be processed by the first UE;
  • the first UE processes the radio link failure.
  • a method for processing a radio link failure is to prevent the two UEs that perform D2D communication between devices fail to the radio link when the radio link fails.
  • the processing is performed to further avoid waste of signaling and resources, save power consumption of the UE, and improve work efficiency of the device.
  • the first UE determines that the radio link failure needs to be processed by the first UE, including:
  • the first UE is the UE that initiates the D2D communication request, determining that the radio link failure needs to be processed by the first UE;
  • the first UE is a UE that transmits a Layer 2 data packet or an IP data packet in D2D communication, it is determined that the radio link failure needs to be processed by the first UE.
  • the first UE that needs to process the failure of the radio link is determined in the foregoing manner, so that when the radio link fails, both UEs performing D2D communication process the radio link failure, thereby avoiding signaling and resource waste. .
  • the first UE processes the radio link failure, including:
  • the first UE initiates a link recovery process by itself;
  • the first UE notifies the base station that the D2D communication link between the first UE and the second UE fails the radio link, and terminates the D2D link between the first UE and the second UE according to the indication of the base station, and enters the D2D RRC idle And according to the indication of the base station, establishing a D2N link between the device and the network node, converting the D2D bearer to the D2N bearer, or initiating a D2D discovery or D2D connection establishment process according to the indication of the base station.
  • the first UE processes the radio link failure.
  • the first UE initiates a link recovery process by itself, including: the first UE enters a D2D RRC idle state, and initiates a D2D discovery process or a D2D connection establishment process.
  • the first UE initiates a D2D connection establishment process to prepare for restoring the D2D communication link.
  • the first UE initiates the link recovery process by itself, and the method further includes: the first UE notifying the base station that the radio link failure occurs on the D2D communication link between the first UE and the second UE.
  • the first UE initiates the link recovery process by itself, and further includes: the first UE notifying the UE of the high-level failure of the D2D communication, and converting the D2D link bearer to the D2N link.
  • the UE can communicate over the D2N link.
  • the method further includes:
  • the first UE starts the D2D link recovery timer, and when the D2D link recovery timer expires, prompts the user whether to continue the D2D link recovery process.
  • the D2D link recovery timer is turned on to determine whether the D2D link recovery process is successful.
  • the method further comprises:
  • the first UE determines that the radio link failure occurring in the D2D communication process does not need to be processed by the first UE;
  • the first UE enters the D2D RRC idle state according to the indication of the base station side, and listens for the D2D discovery signal or the request signal in the D2D connection establishment process.
  • the first UE determines that the first UE does not need to process the radio link failure that occurs during the D2D communication process, thereby preventing the two UEs performing D2D communication from processing the radio link failure when the radio link fails, thereby avoiding signaling.
  • the waste of resources saves the power consumption of the UE and improves the working efficiency of the device.
  • the first UE monitors the D2D discovery signal or the request signal during the D2D connection establishment process, and prepares for restoring the D2D communication link.
  • the method further comprises:
  • the first UE establishes a D2N link between the device and the network node according to the indication of the base station, and converts the D2D bearer to the D2N bearer.
  • the UE can communicate over the D2N link.
  • the method further comprises:
  • the radio link failure occurs in the D2D communication between the first UE and the third UE, determining that the radio link failure does not need to be processed by the first UE;
  • the first UE enters the D2D RRC idle state, and listens to the D2D discovery signal or the D2D connection establishment request signal in the initial process.
  • the first UE determines that the first UE does not need to process the radio link failure that occurs during the D2D communication process, thereby preventing the two UEs performing D2D communication from processing the radio link failure when the radio link fails, thereby avoiding signaling.
  • the waste of resources saves the power consumption of the UE and improves the working efficiency of the device.
  • the first UE monitors the D2D discovery signal or the request signal during the D2D connection establishment process, and prepares for restoring the D2D communication link.
  • the method further includes:
  • the first UE starts the D2D link recovery timer, and when the D2D link recovery timer expires, prompts the user whether to continue the D2D link recovery process.
  • the D2D link recovery timer is turned on to determine whether the D2D link recovery process is successful.
  • the present invention provides a method for processing a radio link failure, the method comprising:
  • the base station notifies the first UE that the first UE does not need to be processed by the first UE in the process of performing D2D communication with the second UE.
  • the base station determines that the first UE that needs to process the radio link fails, and notifies the first UE, to prevent the two UEs that perform D2D communication from processing the radio link failure when the radio link fails. The waste of signaling and resources is avoided.
  • the method further comprises:
  • the base station notifies the second UE that during the D2D communication between the first UE and the second UE, the radio link failure that does not need to be processed by the second UE is not required.
  • the base station determines that the second UE does not need to process the radio link failure that occurs during the D2D communication process, so as to prevent the two UEs performing D2D communication from processing the radio link failure when the radio link fails, thereby avoiding the message.
  • the waste of resources and resources saves the power consumption of the UE and improves the working efficiency of the equipment.
  • the method further comprises:
  • the base station receives the notification that the radio link failure occurs on the D2D communication link between the first UE and the second UE that is sent by the first UE.
  • the method further includes: the base station terminating D2D resource allocation of the D2D link between the first UE and the second UE.
  • the D2D resource allocation of the D2D link between the first UE and the second UE is terminated, which avoids waste of signaling and resources.
  • the method further includes:
  • the base station initiates a link recovery process.
  • the base station when a radio link failure occurs, the base station further processes the occurrence of the radio link failure, that is, initiates a link recovery process.
  • the base station initiates a link recovery process, including:
  • the base station instructs the first UE and the second UE to terminate the D2D communication process and establish a D2N link.
  • the first UE and the second UE establish a D2N link, which serves to restore the link process.
  • the base station initiates a link recovery process, and further includes:
  • the base station instructs the first UE and the second UE to terminate the D2D communication process and establish a D2N link
  • the base station instructs the first UE to start the D2D discovery process or the D2D connection establishment process, and instructs the second UE to monitor the D2D discovery process or the D2D. Connection establishment process.
  • the present invention also provides a processing device for a radio link failure, the device comprising:
  • a first determining module configured to: after the radio link failure occurs in the D2D communication between the first UE and the second UE, determine that the radio link failure needs to be processed by the first UE;
  • the first processing module is configured to process, by the first UE, the radio link failure.
  • the first determining module is specifically configured to:
  • the first UE is the UE that initiates the D2D communication request, determining that the radio link failure needs to be processed by the first UE;
  • the first UE is a UE that transmits a Layer 2 data packet or an IP data packet in D2D communication, it is determined that the radio link failure needs to be processed by the first UE.
  • the first determining module determines that the first UE that needs to process the radio link fails, so that when the radio link fails, both UEs performing D2D communication process the radio link failure, and avoid signaling. And waste of resources.
  • the first processing module is specifically configured to:
  • the bearer is switched to the D2N bearer, and the D2D discovery or D2D connection establishment process is initiated actively or according to the indication of the base station.
  • the first processing module processes the radio link failure.
  • the first processing module is specifically configured to: enable the first UE to enter the D2D RRC idle state, and initiate a D2D discovery process or a D2D connection establishment process.
  • the first processing module when the first processing module is configured to initiate a link recovery process, the first processing module is specifically configured to: enable the first UE to enter the D2D RRC idle state, and initiate a D2D discovery process or a D2D connection establishment process. .
  • the first processing module causes the first UE to initiate a D2D connection establishment process to prepare for restoring the D2D communication link.
  • the first processing module when the first processing module is configured to initiate a link recovery process by itself, the first processing module is further configured to: notify the base station that the D2D communication link between the first UE and the second UE is wireless. The link failed.
  • the first processing module when the first processing module is configured to initiate a link recovery process, the first processing module is further configured to: convert the D2D link bearer to the D2N link.
  • the UE can communicate over the D2N link.
  • the first processing module is further configured to: when the first UE enters the D2D RRC idle state, initiates a D2D discovery process or a D2D connection establishment process, and starts a D2D link recovery timer, when the D2D link When the recovery timer expires, the user is prompted whether to continue the D2D link recovery process.
  • the D2D link recovery timer is turned on to determine whether the D2D link recovery process is successful.
  • the device further comprises:
  • a second determining module configured to determine, during the D2D communication with the third UE, that the radio link failure occurring in the D2D communication process does not need to be processed by the first UE;
  • the second processing module is configured to enter the D2D RRC idle state according to the indication of the base station side, and listen to the D2D discovery signal or the request signal in the D2D connection establishment process.
  • the second determining module determines that the first UE does not need to process the radio link failure that occurs during the D2D communication process, so as to prevent the two UEs performing D2D communication from processing the radio link failure when the radio link fails.
  • the signaling and resource waste are avoided, the power consumption of the UE is saved, and the working efficiency of the device is saved.
  • the second processing module monitors the D2D discovery signal or the request signal in the D2D connection establishment process, and prepares for restoring the D2D communication link.
  • the second processing module is further configured to:
  • the UE can communicate over the D2N link.
  • the second processing module is further configured to: when the first UE enters the D2D RRC idle state, listens to the D2D discovery signal or the request signal in the initial process of establishing the D2D connection, starts the D2D link recovery timer, When the D2D link recovery timer expires, the user is prompted whether to continue the D2D link recovery process.
  • the D2D link recovery timer is turned on to determine whether the D2D link recovery process is successful.
  • the device further comprises:
  • a third determining module configured to: after the radio link failure occurs in the D2D communication between the first UE and the third UE, determine that the radio link failure does not need to be processed by the first UE;
  • the third processing module is configured to trigger the first UE to enter the D2D RRC idle state, and listen to the D2D discovery signal or the request signal in the initial process of establishing the D2D connection.
  • the third determining module determines that the first UE does not need to process the radio link failure that occurs during the D2D communication process, so as to prevent the two UEs performing D2D communication from processing the radio link failure when the radio link fails.
  • the signaling and resource waste are avoided, the power consumption of the UE is saved, and the working efficiency of the device is improved.
  • the third processing module triggers the first UE to listen to the D2D discovery signal or the request signal in the D2D connection establishment process, to restore the D2D communication chain. Road preparation.
  • the third processing module is further configured to: when the first UE enters the D2D RRC idle state, listens to the D2D discovery signal or the request signal in the initial process of establishing the D2D connection, starts the D2D link recovery timer, when When the D2D link recovery timer expires, the user is prompted whether to continue to perform. Line D2D link recovery process.
  • the D2D link recovery timer is turned on to determine whether the D2D link recovery process is successful.
  • An embodiment of the present invention provides a processing device for a radio link failure, where the radio link failure processing device includes a processor and a data transceiver, where:
  • the processor is configured to: after the radio link failure occurs in the D2D communication between the first UE and the second UE, determine that the radio link failure needs to be processed by the first UE; and process the radio link failure ;
  • the data transceiver transmits and receives data under the control of the processor.
  • the present invention further provides a processing device for a radio link failure, the device comprising:
  • a determining module configured to determine, during the process of performing D2D communication between the first user equipment UE and the second UE, that the radio link failure that occurs needs to be processed by the first UE;
  • the notification module is configured to notify the first UE that the first UE does not need to be processed by the first UE in the process of performing D2D communication with the second UE.
  • the device further comprises:
  • the notification module is further configured to notify the second UE that the second UE does not need to be processed by the second UE in the process of performing D2D communication between the first UE and the second UE.
  • the notification module notifies the second UE that the radio link failure that occurs during the D2D communication process is not required to be processed, thereby preventing the two UEs performing D2D communication from processing the radio link failure when the radio link fails, thereby avoiding The waste of signaling and resources saves the power consumption of the UE and improves the working efficiency of the device.
  • the device further comprises:
  • a receiving module configured to receive, by the first UE, a notification that a radio link failure occurs on the D2D communication link between the first UE and the second UE.
  • the device further comprises:
  • a processing module configured to terminate D2D resource allocation of the D2D link between the first UE and the second UE after the receiving module receives the notification.
  • the D2D resource allocation of the D2D link between the first UE and the second UE is terminated, which avoids waste of signaling and resources.
  • the processing module is further configured to:
  • the link recovery process initiating module further processes the occurring radio link failure, that is, initiates a link recovery process.
  • the processing module when the processing module initiates the link recovery process, the processing module is specifically configured to:
  • the first UE and the second UE are instructed to terminate the D2D communication process and establish a D2N link.
  • the first UE and the second UE establish a communication D2N link between the new device and the network node.
  • the processing module when the processing module initiates the link recovery process, the processing module is further configured to:
  • An embodiment of the present invention provides a processing device for a radio link failure, where the radio link failure processing device includes a processor and a data transceiver, where:
  • the processor is configured to determine, in a process of performing D2D communication between the first user equipment UE and the second UE, that the generated radio link failure needs to be processed by the first UE; and notify the first UE that the first UE is in the first During the D2D communication between the UE and the second UE, the radio link failure that needs to be processed by the first UE needs to be processed;
  • the data transceiver transmits and receives data under the control of the processor.
  • FIG. 1 is a schematic diagram of a manner of centralized control of a network in the prior art
  • FIG. 2 is a schematic diagram of a communication mode between devices in the prior art
  • FIG. 3 is a schematic diagram of a prior art unicast D2D communication
  • FIG. 4 is a schematic flowchart of a method for processing a radio link failure on a UE side according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart of a method for processing a radio link failure on a base station side according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a method for processing a radio link failure according to Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of a method for processing a radio link failure according to Embodiment 2 of the present invention.
  • Embodiment 8 is a schematic diagram of a method for processing a radio link failure in Embodiment 3 according to the present invention.
  • FIG. 9 is a schematic diagram of a processing apparatus for failing a radio link on a UE side according to an embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of a device for processing a radio link failure on a base station side according to an embodiment of the present invention.
  • the present invention provides a method and a device for processing a radio link failure on the device side and the base station side, respectively, in order to avoid two UEs performing D2D communication between devices when a Radio Link Failure (RLF) occurs.
  • RLF Radio Link Failure
  • the failure of the radio link is avoided, and the signaling and resource waste are avoided in the case that the D2D communication can be timely converted or restored in time, thereby saving the power consumption of the UE and improving the working efficiency of the device.
  • the present invention provides a method for processing a radio link failure, and the method includes:
  • the first UE processes the radio link failure.
  • the first UE determines that the radio link failure needs to be processed by the first UE, and may adopt one of the following three methods:
  • Manner 1 According to the indication of the base station side, determining that the radio link failure needs to be processed by the first UE; for example, the base station receives the reference signal received power (RSRP) or the reference signal receiving quality according to the base station to the UE ( Reference Signal Received Quality (RSRQ), or Channel Quality Indicator (CQI), selects D2N (Device to Network, device to network node) quality is better, that is, RSRP, RSRQ or CQI higher UE as the processing wireless
  • RSRP Reference Signal Received Quality
  • RSRQ Channel Quality Indicator
  • Manner 3 When the first UE is a UE that transmits a Layer 2 (L2) data packet or an IP data packet in D2D communication, it is determined that the radio link failure needs to be processed by the first UE.
  • L2 Layer 2
  • the first UE processes the radio link failure, and may adopt one of the following two methods:
  • Manner 1 The first UE initiates the link recovery process by itself; specifically, the first UE enters the D2D RRC idle state, and initiates a D2D discovery process or a D2D connection establishment process; the first UE notifies the base station to terminate the first UE and the second UE. Resource allocation between the D2D communication links; optionally, the first UE notifies the UE that the radio link fails during the D2D communication, and the first UE converts the D2D link bearer to the D2N link.
  • Manner 2 The first UE notifies the base station that the D2D communication link between the first UE and the second UE fails the radio link, and terminates the D2D link between the first UE and the second UE according to the indication of the base station, and enters The D2D RRC idle state, and according to the indication of the base station, establishes a D2N link between the device and the network node, converts the D2D bearer to the D2N bearer, and initiates a D2D discovery or a D2D connection establishment process according to the indication of the base station.
  • the method further includes:
  • the first UE starts the D2D link recovery timer, and when the D2D link recovery timer expires, prompts the user whether to continue the D2D link recovery process; wherein the D2D link recovery timer may be set by the user, or The timer is set by the interaction between the server of the D2D communication and the UE side.
  • the first UE does not need to process the radio link failure
  • the third UE and the second UE may be the same UE, or may be different UEs.
  • the first UE When the first UE determines that the radio link failure occurring in the D2D communication process does not need to be processed by the first UE during the D2D communication with the third UE, the first UE enters the D2D according to the indication of the base station side.
  • the RRC idle state monitors the D2D discovery signal or the request signal during the D2D connection establishment process.
  • the first UE establishes a D2N link between the device and the network node according to the indication of the base station, and converts the D2D bearer to the D2N bearer.
  • the first UE After the radio link failure occurs in the D2D communication between the first UE and the third UE, determining that the radio link failure does not need to be processed by the first UE, the first UE enters the D2D RRC idle state, and listens to the D2D discovery signal or D2D.
  • the connection establishes a request signal during the initial process;
  • the method further includes: when the first UE enters the D2D RRC idle state, and listens to the D2D discovery signal or the D2D connection establishment request signal in the initial process, the method further includes:
  • the first UE starts the D2D link recovery timer, and when the D2D link recovery timer expires, prompts the user whether to continue the D2D link recovery process; wherein the D2D link recovery timer may be set by the user, or The timer is set by the interaction between the server of the D2D communication and the UE side.
  • the first UE determines that the radio link failure does not need to be processed by the first UE, and may adopt one of the following three methods:
  • Manner 1 Determine D2D communication between the first UE and the third UE according to the indication of the base station side
  • the radio link failure occurring in the process does not need to be processed by the first UE; for example, the base station receives a reference signal received power (RSRP) or a reference signal received quality (RSRQ) according to a reference signal between the base station and the UE. ), or Channel Quality Indicator (CQI), selects a UE with a better D2N quality, that is, a UE with a relatively high RSRP, RSRQ, or CQI as a UE that fails to handle the radio link, and another UE does not need to process the radio. a UE that fails the link, and notifies the UE pair that performs D2D communication by displaying signaling;
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • CQI Channel Quality Indicator
  • Manner 3 When the first UE is not a UE that transmits Layer 2 (L2) data packets or IP data packets in D2D communication, it is determined that the radio link failure does not need to be processed by the first UE.
  • L2 Layer 2
  • the UE detects whether a radio link failure occurs during D2D communication, for example:
  • the UE When the UE detects that the signal quality of the link during the D2D communication is below a certain threshold and continues for a period of time, for example, the RSRQ is less than -12 dB and the situation lasts for 1 s; or
  • the number of retransmissions of D2D data packets reaches a maximum, such as radio link control (RLC) retransmission times up to 4 times; or
  • the data sent by the peer is not received within a certain period of time. If the UE does not receive the data sent by the peer within 5s, it is considered that the radio link fails during the D2D communication.
  • the present invention provides a method for processing a radio link failure, the method comprising:
  • the base station determines that, in the process of performing D2D communication between the first user equipment UE and the second UE, the radio link failure that needs to be processed by the first UE is required;
  • the base station notifies the first UE that the first UE does not need to be processed by the first UE in the process of performing D2D communication with the second UE.
  • the method further comprises:
  • the method further includes: the base station terminating D2D resource allocation of the D2D link between the first UE and the second UE
  • the method further includes:
  • the base station initiates a link recovery process.
  • the base station initiates a link recovery process according to the notification of the first UE, where the base station instructs the first UE and the second UE to terminate the D2D communication process, and establishes a communication D2N link between the device and the network node;
  • a UE starts a D2D discovery process or a D2D connection establishment process, and instructs the second UE to listen to the D2D discovery process or the D2D connection establishment process.
  • the UE performing D2D communication may have two states in the Radio Resource Control (RRC) layer, and one is a D2D connection state. In this state, D2D communication can be performed with the peer UE.
  • RRC Radio Resource Control
  • the other state is entered, that is, the D2D idle state, in which the UE passes the D2D Discovery process or
  • the D2D connection establishment process enters the D2D connection state after performing related interaction with the D2D communication peer UE.
  • the UE when a radio link fails during D2D communication, the UE notifies the base station side to perform processing.
  • the base station determines that, in the process of performing D2D communication between the first UE and the second UE, the first UE needs to process the radio link failure that occurs, and the second UE does not need to process the radio link failure that occurs;
  • the base station notifies the first UE that the radio link failure that needs to be processed needs to be notified, and notifies the second UE that the radio link failure that does not need to be processed is required;
  • steps S600 and S601 are optional steps, and are not required to be executed when the UE itself determines whether it is necessary to process the failed radio link.
  • the first UE determines that the radio link failure that needs to be processed occurs, and the second UE determines that the UE does not need to Handling of the occurrence of the radio link failure;
  • S603 The first UE detects whether a radio link failure occurs during D2D communication
  • the base station terminates resource allocation of the D2D communication link between the first UE and the second UE according to the notification of the first UE.
  • the base station instructs the first UE and the second UE to terminate the D2D communication link, and establish a communication D2N link between the device and the network node.
  • the base station instructs the first UE to start a D2D discovery process or a D2D connection establishment process.
  • the base station instructs the second UE to monitor the D2D discovery signal or the request signal in the D2D connection establishment process.
  • the first UE terminates the D2D communication link according to the instruction of the base station in step S606, and establishes a D2N link.
  • the D2D bearer is switched to the D2N bearer, and the D2D RRC idle state is initiated or initiated according to the indication of the base station in step S607, and a D2D discovery or D2D connection establishment process is initiated.
  • the D2D link recovery timer can be started;
  • the second UE terminates the D2D communication link according to the instruction of the base station in step S606, and establishes a D2N link. Actively or according to the indication of the base station in step S608, enter the D2D RRC idle state, and listen to the D2D discovery signal or the request signal in the D2D connection establishment process. At the same time, optionally, the D2D link recovery timer can be turned on at the same time.
  • the first UE initiates a D2D discovery process or a D2D connection establishment initial process, and starts a D2D link recovery timer; when the second UE detects the D2D communication, a radio link fails, and starts to monitor the D2D discovery signal or When the D2D connection establishes the request signal in the initial process, the second UE also starts the D2D link recovery timer.
  • the timing of the D2D link recovery timer can be set by the user or by the interaction between the server and the UE side of the D2D communication. For example, it can be set to 20s or 1 minute.
  • the first UE or the second UE sends a D2D link recovery to the upper layer of the UE.
  • the failing indication message is used for further decision by the UE, for example, the user interface of the UE may display that the D2D link fails, and prompts the user whether to continue the D2D link recovery process.
  • the method for detecting whether a radio link failure occurs during the D2D communication process of the UE is as follows:
  • the UE When the UE detects that the signal quality of the link during the D2D communication is below a certain threshold and continues for a period of time, for example, the RSRQ is less than -12 dB and the situation lasts for 1 s; or
  • the number of retransmissions of D2D data packets reaches a maximum, such as radio link control (RLC) retransmission times up to 4 times; or
  • the data sent by the peer UE is not received within a certain period of time. If the UE does not receive the data sent by the peer UE within 5s, it is considered that the radio link fails during the D2D communication.
  • the method for the base station to determine the UE that fails to process the radio link includes: the base station side obtains a reference signal received power (RSRP) and a reference signal between the two UEs participating in the D2D communication pair according to the previous measurement report.
  • the Received Signal Received Quality (RSRQ) and the Channel Quality Indicator (CQI) are selected, and the D2N quality is better, that is, the UE with a higher RSRP, RSRQ, or CQI is used as the UE that fails to handle the radio link; or, when When the first UE is the UE that initiates the D2D communication request, it is determined that the radio link failure needs to be processed by the first UE; or, when the first UE is the UE that transmits the layer 2 data packet or the IP data packet in the D2D communication, Determining that the radio link failure needs to be processed by the first UE;
  • the base station notifies the UE in the D2D communication pair as the UE responsible for the processing after the D2D link RLF through the RRC message, for example, the base station side sends an RRC message carrying the 1-bit indication information to the UE, and the indication information is used for the UE. Indicates whether the UE is a UE that processes the RLF. If the indication information is true, the UE is instructed to be the UE that processes the RLF. Otherwise, if the indication information is false, the UE is not the UE that processes the RLF, and therefore, the RRC message is received.
  • the UE is determined to be the UE that processes the RLF; if the received RRC message does not have the indication information, or the UE whose indication information is false, it is determined that the UE is not the UE that processes the RLF.
  • both UEs that perform D2D communication are prevented from informing the RLF of the base station side; meanwhile, the above process is determined to be in the process of transmitting
  • the RLF is generated, which UE is responsible for processing the RLF occurring during the D2D communication process
  • the UE is required to be both a sender and a listener in detecting the D2D communication link recovery process, for example, in the above manner, responsible for processing the D2D communication.
  • the UE of the RLF that occurs in the process only needs to broadcast the D2D discovery signal, and is not responsible for processing the RLF UE that occurs during the D2D communication process, and only needs to monitor the D2D discovery signal during the discovery process, thereby further avoiding the waste of signaling and resources. It saves the power consumption of the UE and improves the working efficiency of the system.
  • the UE initiates its own link recovery process when the radio link fails, but needs to notify the network side.
  • the base station determines that the first UE needs to process the radio link failure that occurs during the D2D communication between the first UE and the second UE, and the second UE does not need to process the radio link failure that occurs.
  • the base station notifies the first UE that the radio link failure that needs to be processed needs to be notified, and notifies the second UE that the radio link failure that does not need to be processed is not required;
  • steps S700 and S701 are optional steps, and are not required to be performed when the UE itself determines whether it is necessary to process the failed radio link.
  • S702 The first UE determines that the radio link failure that needs to be processed occurs, and the second UE determines that the radio link failure that does not need to be processed occurs;
  • the first UE When the first UE detects the radio link failure RLF in the process of detecting the D2D communication, the first UE initiates a self-link recovery process, enters a D2D RRC idle state, and starts a D2D discovery process or a D2D connection establishment process;
  • the D2D link recovery timer can be enabled.
  • the first UE notifies the base station that the radio link fails during the D2D communication process by using the RRC message.
  • S705 The base station terminates resource allocation of the D2D communication link between the first UE and the second UE according to the notification of the first UE in step 704.
  • S706 When the second UE detects the radio link failure RLF in the process of detecting the D2D communication, enter the D2D RRC idle state, and listen to the D2D discovery signal or the initial process of establishing the D2D connection.
  • the request signal at the same time, optionally, the D2D link recovery timer can be turned on.
  • the first UE notifies the UE that the radio link fails in the process of the D2D communication, and converts the D2D link bearer to the D2N link.
  • the first UE triggers the UE high layer. Initiating a D2D discovery process or a D2D connection establishment process, and further notifying the first UE on the network side that a radio link failure occurs during D2D communication with the second UE.
  • the method for the UE to detect whether a radio link fails during D2D communication is as follows:
  • the UE When the UE detects that the signal quality of the link during the D2D communication is below a certain threshold and continues for a period of time, for example, the RSRQ is less than -12 dB and the situation lasts for 1 s; or
  • the number of retransmissions of D2D data packets reaches a maximum, such as radio link control (RLC) retransmission times up to 4 times; or
  • the data sent by the peer is not received within a certain period of time. If the UE does not receive the data sent by the peer within 5s, it is considered that the radio link fails during the D2D communication.
  • the method for the base station to determine the UE that fails to process the radio link includes: the base station side obtains a reference signal received power (RSRP) and a reference signal between the two UEs participating in the D2D communication pair according to the previous measurement report.
  • the Received Signal Received Quality (RSRQ) and the Channel Quality Indicator (CQI) are selected, and the D2N quality is better, that is, the UE with a higher RSRP, RSRQ, or CQI is used as the UE that fails to handle the radio link; or, when When the first UE is the UE that initiates the D2D communication request, it is determined that the radio link failure needs to be processed by the first UE; or, when the first UE is the UE that transmits the layer 2 data packet or the IP data packet in the D2D communication, Determining that the radio link failure needs to be processed by the first UE.
  • RSRP reference signal received power
  • CQI Channel Quality Indicator
  • the base station notifies, by using an RRC message, whether the UE in the D2D communication pair is the UE that is responsible for the processing after the D2D link RLF.
  • the base station side sends an RRC message carrying the 1-bit indication information to the UE, where the indication information is used to indicate Whether the UE is a UE that processes the RLF, if the indication information is true, the UE is instructed to be the UE that processes the RLF, and if the indication information is false, the UE is not the UE that processes the RLF, and therefore, the RRC message is received.
  • the UE If the UE indicating that the information is true, the UE is determined to be the UE that processes the RLF; the received RRC message does not have the indication information, or If the UE whose indication information is false, it is determined that the UE is not a UE that processes the RLF.
  • both UEs that perform D2D communication are prevented from informing the RLF of the base station side; meanwhile, the foregoing process determines which UE is responsible for processing the D2D communication process when the RLF occurs.
  • the RLF that occurs in the UE avoids the UE in the process of detecting the D2D communication link recovery, and needs to be both a sender and a listener. For example, in the above manner, the UE responsible for processing the RLF occurring during the D2D communication process only needs to broadcast.
  • the D2D discovery signal which is not responsible for processing the RLF UEs that occur during the D2D communication process, only needs to monitor the D2D discovery signal during the discovery process, thereby further avoiding the waste of signaling and resources, saving the power consumption of the UE, and improving the system work. effectiveness.
  • the UE initiates its own link recovery process when a radio link fails during D2D communication.
  • S83 The second UE monitors the D2D discovery signal or the D2D connection establishes a request signal in an initial process.
  • the first UE needs to send an indication message that the radio link fails during the D2D communication process to the upper layer of the UE, and triggers the UE to perform the link conversion of the D2D to the D2N.
  • the indication message further triggers the UE to initiate the D2D discovery process or the D2D connection establishment process.
  • the second UE needs to send an indication message that the radio link fails during the D2D communication process to the UE upper layer, and triggers the UE to perform D2D to D2N. Link conversion.
  • the method for the base station to determine the UE that fails to process the radio link includes: the base station side obtains a reference signal received power (RSRP) between the two UEs participating in the D2D communication pair according to the previous measurement report. And the reference signal received quality (RSRQ) and the channel quality indicator (CQI), and the D2N quality is better, that is, the UE with a relatively high RSRP, RSRQ, or CQI is used as the UE that fails to process the radio link; Or, when the first UE is the UE that initiates the D2D communication request, determining that the radio link failure needs to be processed by the first UE; or, when the first UE is in the D2D communication, as the sending layer 2 data packet or the IP data packet When the UE determines that the radio link fails, it needs to be processed by the first UE.
  • RSRP reference signal received power
  • CQI channel quality indicator
  • the method for the UE to detect whether a radio link fails during D2D communication is as follows:
  • the UE When the UE detects that the signal quality of the link during the D2D communication is below a certain threshold and continues for a period of time, for example, the RSRQ is less than -12 dB and the situation lasts for 1 s; or
  • the number of retransmissions of D2D data packets reaches a maximum, such as radio link control (RLC) retransmission times up to 4 times; or
  • the data sent by the peer is not received within a certain period of time. If the UE does not receive the data sent by the peer within 5s, it is considered that the radio link fails during the D2D communication.
  • both UEs that perform D2D communication are prevented from informing the RLF of the base station side; meanwhile, the foregoing process determines which UE is responsible for processing the D2D communication process when the RLF occurs.
  • the RLF that occurs in the UE avoids the UE in the process of detecting the D2D communication link recovery, and needs to be both a sender and a listener. For example, in the above manner, the UE responsible for processing the RLF occurring during the D2D communication process only needs to broadcast.
  • the D2D discovery signal which is not responsible for processing the RLF UEs that occur during the D2D communication process, only needs to monitor the D2D discovery signal during the discovery process, thereby further avoiding the waste of signaling and resources, saving the power consumption of the UE, and improving the system work. effectiveness.
  • an embodiment of the present invention provides a processing device for a radio link failure, where the radio link failure processing device is specifically a first UE, and the device includes:
  • a first determining module 91 configured to generate a wireless chain when D2D communication between the first UE and the second UE occurs After the path fails, it is determined that the radio link failure needs to be processed by the first UE;
  • the first processing module 92 is configured to process the radio link failure.
  • the first determining module 91 is specifically configured to:
  • the first UE is the UE that initiates the D2D communication request, determining that the radio link failure needs to be processed by the first UE;
  • the first UE is a UE that transmits a Layer 2 data packet or an IP data packet in D2D communication, it is determined that the radio link failure needs to be processed by the first UE.
  • the first processing module 92 is specifically configured to:
  • the first processing module 92 when the first processing module 92 is configured to initiate the link recovery process by itself, the first processing module 92 is specifically configured to: enable the first UE to enter the D2D RRC idle state, and initiate a D2D discovery process or a D2D connection establishment process. .
  • the first processing module 92 when the first processing module 92 is configured to initiate the link recovery process by itself, the first processing module 92 is further configured to: notify the base station that the D2D communication link between the first UE and the second UE generates a wireless link. failure.
  • the first processing module 92 when the first processing module 92 is configured to initiate a link recovery process by itself, the first processing module 92 is further configured to: convert the D2D link bearer to the D2N link.
  • the first processing module 92 is further configured to: when the first UE enters the D2D RRC idle state, and initiates a D2D discovery process or a D2D connection establishment process, the D2D link recovery is started. When the D2D link recovery timer expires, the user is prompted to continue to perform the D2D link recovery process.
  • the device further comprises:
  • a second determining module configured to determine, during the D2D communication process between the first UE and the third UE, that the radio link failure occurring in the D2D communication process does not need to be processed by the first UE;
  • the second processing module is configured to trigger the first UE to enter the D2D RRC idle state according to the indication of the base station side, and listen to the D2D discovery signal or the request signal in the D2D connection establishment process.
  • the second processing module is further configured to:
  • the second processing module is further configured to: when the first UE enters the D2D RRC idle state, listens to the D2D discovery signal or the request signal in the initial process of establishing the D2D connection, starts the D2D link recovery timer, When the D2D link recovery timer expires, the user is prompted whether to continue the D2D link recovery process.
  • the device further comprises:
  • a third determining module configured to: after the radio link failure occurs in the D2D communication between the first UE and the third UE, determine that the radio link failure does not need to be processed by the first UE;
  • the third processing module is configured to trigger the first UE to enter the D2D RRC idle state, and listen to the D2D discovery signal or the request signal in the initial process of establishing the D2D connection.
  • the third processing module is further configured to: when the first UE enters the D2D RRC idle state, listens to the D2D discovery signal or the request signal in the initial process of establishing the D2D connection, starts the D2D link recovery timer, When the D2D link recovery timer expires, the user is prompted whether to continue the D2D link recovery process.
  • the first determining module 91, the first processing module 92, the second determining module, the second processing module, the third determining module, and the third processing module may be entities such as a processor, and the present invention is not limited to implementing the modules. Entity.
  • An embodiment of the present invention provides a processing device for failing a radio link, where the radio link fails.
  • the processing device includes a processor and a data transceiver, wherein:
  • the processor is configured to: after the radio link failure occurs in the D2D communication between the first UE and the second UE, determine that the radio link failure needs to be processed by the first UE; and process the radio link failure ;
  • the data transceiver transmits and receives data under the control of the processor.
  • an embodiment of the present invention provides a processing apparatus for a radio link failure, and the apparatus includes:
  • a determining module 101 configured to determine, in a process of performing D2D communication between the first user equipment UE and the second UE, that the generated radio link failure needs to be processed by the first UE;
  • the notification module 102 is configured to notify the first UE that the first UE does not need to be processed by the first UE in the process of performing D2D communication with the second UE.
  • the notification module 102 is further configured to:
  • the device further comprises:
  • a receiving module configured to receive, by the first UE, a notification that a radio link failure occurs on the D2D communication link between the first UE and the second UE.
  • the device further comprises:
  • a processing module configured to terminate D2D resource allocation of the D2D link between the first UE and the second UE after the receiving module receives the notification.
  • the processing module is further configured to: initiate a link recovery process after terminating D2D resource allocation of the D2D link between the first UE and the second UE;
  • the processing module when the processing module initiates the link recovery process, the processing module is specifically configured to:
  • the first UE and the second UE are instructed to terminate the D2D communication process and establish a D2N link.
  • the processing module when the processing module initiates the link recovery process, the processing module is further configured to:
  • the UE After instructing the first UE and the second UE to terminate the D2D communication process and establishing the D2N link, instructing the first UE to start the D2D discovery process or the D2D connection establishment process, and instructing the second The UE listens to the D2D discovery process or the D2D connection establishment process.
  • the determining module 101 and the processing module may be entities such as a processor, and the notification module 102 and the receiving module may be implemented by a transmission module having a transceiving function.
  • the notification module 102 and the receiving module may be devices such as an antenna, and the present invention is not limited to implementation. The entities of these modules.
  • An embodiment of the present invention provides a processing device for a radio link failure, where the radio link failure processing device includes a processor and a data transceiver, where:
  • the processor is configured to determine, in a process of performing D2D communication between the first user equipment UE and the second UE, that the generated radio link failure needs to be processed by the first UE; and notify the first UE that the first UE is in the first During the D2D communication between the UE and the second UE, the radio link failure that needs to be processed by the first UE needs to be processed;
  • the data transceiver transmits and receives data under the control of the processor.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the device is implemented in a flow chart or Multiple processes and/or block diagrams The functions specified in one or more boxes.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请涉及一种无线链路失败的处理方法及装置，用以避免在发生无线链路失败时，进行设备间D2D通信的两UE均对该无线链路失败进行处理，在保证D2D通信能及时转换或及时恢复的情况下避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率。所述无线链路失败的处理方法包括：当第一用户设备UE与第二UE间的设备间D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；第一UE针对该无线链路失败进行处理。

Description

一种无线链路失败的处理方法及装置
本申请要求在2013年9月25日提交中国专利局、申请号为201310453236.6、发明名称为“一种无线链路失败的处理方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种无线链路失败的处理方法及装置。
背景技术
目前，长期演进(Long Term Evolution，LTE)系统采取的是网络集中控制的方式，即用户设备(User Equipment，UE)的上下行数据都在网络的控制下进行发送和接收。如图1所示，UE间的通信是由网络进行转发和控制的，UE间不存在直接的通信链路，UE也不允许自行发送上行数据。
如图2所示，在设备间(Device to Device，D2D)通信模式中，用户设备和用户设备之间允许进行一定的直接通信，这些直接通信链路可以是在网络控制或者辅助下建立起来的；用户设备和用户设备之间进行D2D通信的基础可以是基于对靠近的用户设备的D2D发现过程。
D2D通信也适用于公共安全的UE。在公共安全领域，例如公安，消防，救护等场景，特殊的指定用户设备之间可以直接进行单播的D2D通信或者多播或广播的D2D通信。如图3所示，在单播D2D通信中，UE1和/或UE2可以处于蜂窝网覆盖场景，即在网场景，也可以不处于蜂窝网覆盖场景，即脱网场景；在网场景下，UE间的D2D通信资源可以受网络侧控制，也可以同脱网场景一样，采用脱网模式工作，D2D通信资源不受网络侧动态或半静态控制。
现有技术中，D2D通信过程中会发生无线链路失败(Radio Link Failure，RLF)，在D2D通信发生无线链路失败时，该D2D通信链路上的两UE均会对该无线链路失败进行处理，因而会进一步造成信令及资源的浪费，损耗了UE的 电能，降低了设备的工作效率。
发明内容
本发明提供一种无线链路失败的处理方法及装置，用以避免在发生无线链路失败时，进行设备间D2D通信的两UE均对该无线链路失败进行处理，在保证D2D通信能及时转换或及时恢复的情况下避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率。
本发明实施例提供了一种无线链路失败的处理方法，该方法包括：
当第一用户设备UE与第二UE间的设备间D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；
第一UE针对该无线链路失败进行处理。
从上述方案中可以看出，本发明实施例提供的一种无线链路失败的处理方法，用以避免在发生无线链路失败时，进行设备间D2D通信的两UE均对该无线链路失败进行处理，进一步避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率。
较佳地，第一UE确定该无线链路失败需要由该第一UE处理，包括：
根据基站侧的指示，确定该无线链路失败需要由该第一UE处理；或者，
当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，
当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
通过上述方式确定需要处理该无线链路失败的第一UE，以避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，避免了信令及资源的浪费。
较佳地，第一UE针对该无线链路失败进行处理，包括：
第一UE自行发起链路恢复过程；或者，
第一UE通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败，并根据基站的指示，终止第一UE与第二UE之间的D2D链路，进入D2D RRC idle态，并根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上，主动或者根据基站指示发起D2D发现或者D2D连接建立过程。
这样，在发生无线链路失败时，第一UE对该无线链路失败进行了处理。
较佳地，第一UE自行发起链路恢复过程，包括：第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程。
这样，在发生无线链路失败时，第一UE发起D2D连接建立过程，为恢复D2D通信链路做准备。
较佳地，第一UE自行发起链路恢复过程，还包括：第一UE通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败。
这样以便基站对发生的无线链路失败作进一步处理。
较佳地，第一UE自行发起链路恢复过程，还包括：第一UE通知UE高层该D2D通信的过程中发生了无线链路失败，将D2D链路承载转换到D2N链路上。
这样，UE便可以通过D2N链路进行通信。
较佳地，第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程的同时，该方法还包括：
第一UE开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
这样，开启D2D链路恢复定时器以便判断D2D链路恢复过程是否成功。
较佳地，该方法还包括：
第一UE在与第三UE进行D2D通信过程中，确定该D2D通信过程中发生的无线链路失败不需要由该第一UE处理；
第一UE根据基站侧指示，进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号。
这样，确定第一UE不需要处理D2D通信过程中发生的无线链路失败，进而避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，进而避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率；同时第一UE监听D2D发现信号或者D2D连接建立过程中的请求信号，为恢复D2D通信链路做准备。
较佳地，该方法还包括：
第一UE根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上。
这样，UE便可以通过D2N链路进行通信。
较佳地，该方法还包括：
当第一UE与第三UE间的D2D通信发生无线链路失败后，确定该无线链路失败不需要由该第一UE处理；
第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号。
这样，确定第一UE不需要处理D2D通信过程中发生的无线链路失败，进而避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，进而避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率；同时第一UE监听D2D发现信号或者D2D连接建立过程中的请求信号，为恢复D2D通信链路做准备。
较佳地，第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，该方法还包括：
第一UE开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
这样，开启D2D链路恢复定时器以便判断D2D链路恢复过程是否成功。
在基站侧，本发明提供了一种无线链路失败的处理方法，该方法包括：
基站确定在第一用户设备UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
基站通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理。
通过上述方式基站确定需要处理该无线链路失败的第一UE，并通知该第一UE，以避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，避免了信令及资源的浪费。
较佳地，该方法还包括：
基站通知所述第二UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败不需要由该第二UE处理。
这样，基站确定第二UE不需要处理D2D通信过程中发生的无线链路失败，进而避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，进而避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率。
较佳地，该方法还包括：
基站接收第一UE发送的第一UE与第二UE之间的D2D通信链路发生无线链路失败的通知。
这样以便基站对发生的无线链路失败作进一步处理。
较佳地，基站接收到所述通知后，该方法还包括：基站终止对第一UE与第二UE之间的D2D链路的D2D资源分配。
这样，终止对第一UE与第二UE之间的D2D链路的D2D资源分配，避免了信令及资源的浪费。
较佳地，基站终止对第一UE与第二UE之间的D2D链路的D2D资源分配之后，该方法还包括：
基站发起链路恢复过程。
这样，在发生无线链路失败时，基站对发生的无线链路失败作进一步处理，即发起链路恢复过程。
较佳地，基站发起链路恢复过程，包括：
基站指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路。
这样，在发生无线链路失败后，第一UE和第二UE建立D2N链路，起到恢复链路过程的作用。
较佳地，基站发起链路恢复过程，还包括：
基站在指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路之后，基站指示第一UE开启D2D发现过程或者D2D连接建立过程，并指示第二UE监听D2D发现过程或者D2D连接建立过程。
这样以便恢复D2D通信链路。
本发明还提供一种无线链路失败的处理装置，该装置包括：
第一确定模块，用于当第一UE与第二UE间的D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；
第一处理模块，用于第一UE针对该无线链路失败进行处理。
较佳地，第一确定模块在确定该无线链路失败需要由该第一UE处理时，具体用于：
根据基站侧的指示，确定该无线链路失败需要由该第一UE处理；或者，
当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，
当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
通过上述方式第一确定模块确定需要处理该无线链路失败的第一UE，以避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，避免了信令及资源的浪费。
较佳地，第一处理模块，具体用于：
发起链路恢复过程；或者，
通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败，并根据基站的指示，终止第一UE与第二UE之间的D2D链路，进入D2D RRC idle态，并根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D 承载转换到D2N承载上，主动或者根据基站指示发起D2D发现或者D2D连接建立过程。
这样，在发生无线链路失败时，第一处理模块对该无线链路失败进行了处理。较佳地，第一处理模块，具体用于：令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程。
较佳地，当所述第一处理模块用于自行发起链路恢复过程时，第一处理模块，具体用于：令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程。
这样，在发生无线链路失败时，第一处理模块令第一UE发起D2D连接建立过程，为恢复D2D通信链路做准备。
较佳地，当所述第一处理模块用于自行发起链路恢复过程时，所述第一处理模块，还用于：通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败。
这样以便基站对发生的无线链路失败作进一步处理。
较佳地，当第一处理模块用于自行发起链路恢复过程时，第一处理模块，还用于：将D2D链路承载转换到D2N链路上。
这样，UE便可以通过D2N链路进行通信。
较佳地，第一处理模块还用于：在令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
这样，开启D2D链路恢复定时器以便判断D2D链路恢复过程是否成功。
较佳地，该装置还包括：
第二确定模块，用于在第一UE在与第三UE进行D2D通信过程中，确定该D2D通信过程中发生的无线链路失败不需要由该第一UE处理；
第二处理模块，用于根据基站侧指示，进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号。
这样，第二确定模块确定第一UE不需要处理D2D通信过程中发生的无线链路失败，进而避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，进而避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率；同时第二处理模块监听D2D发现信号或者D2D连接建立过程中的请求信号，为恢复D2D通信链路做准备。
较佳地，第二处理模块还用于：
根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上。
这样，UE便可以通过D2N链路进行通信。
较佳地，第二处理模块还用于：在触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
这样，开启D2D链路恢复定时器以便判断D2D链路恢复过程是否成功。
较佳地，该装置还包括：
第三确定模块，用于当第一UE与第三UE间的D2D通信发生无线链路失败后，确定该无线链路失败不需要由该第一UE处理；
第三处理模块，用于触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号。
这样，第三确定模块确定第一UE不需要处理D2D通信过程中发生的无线链路失败，进而避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，进而避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率；同时第三处理模块触发第一UE监听D2D发现信号或者D2D连接建立过程中的请求信号，为恢复D2D通信链路做准备。
较佳地第三处理模块还用于：在触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执 行D2D链路恢复过程。
这样，开启D2D链路恢复定时器以便判断D2D链路恢复过程是否成功。
本发明实施例提供了一种无线链路失败的处理装置，该无线链路失败的处理装置包括处理器和数据收发机，其中：
所述处理器被配置为用于当第一UE与第二UE间的D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；针对该无线链路失败进行处理；
所述数据收发机在所述处理器的控制下收发数据。
在基站侧，本发明还提供了一种无线链路失败的处理装置，该装置包括：
确定模块，用于确定在第一用户设备UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
通知模块，用于通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理。
较佳地，该装置还包括：
通知模块还用于，用于通知所述第二UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败不需要由该第二UE处理。
这样，通知模块通知第二UE不需要处理D2D通信过程中发生的无线链路失败，进而避免在发生无线链路失败时，进行D2D通信的两UE均对该无线链路失败进行处理，进而避免信令及资源的浪费，节约了UE的耗电，提高设备的工作效率。
较佳地，该装置还包括：
接收模块，用于接收第一UE发送的第一UE与第二UE之间的D2D通信链路发生无线链路失败的通知。
这样以便基站对发生的无线链路失败作进一步处理。
较佳地，该装置还包括：
处理模块，用于在所述接收模块接收到所述通知后，终止对第一UE与第二UE之间的D2D链路的D2D资源分配。
这样，终止对第一UE与第二UE之间的D2D链路的D2D资源分配，避免了信令及资源的浪费。
较佳地，处理模块还用于：
在终止对第一UE与第二UE之间的D2D链路的D2D资源分配之后，发起链路恢复过程。
这样，在发生无线链路失败时，链路恢复过程发起模块对发生的无线链路失败作进一步处理，即发起链路恢复过程。
较佳地，处理模块在发起链路恢复过程时，具体用于：
指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路。
这样，在发生无线链路失败后，第一UE和第二UE建立新的设备与网络节点间的通信D2N链路
较佳地，处理模块在发起链路恢复过程时，还用于：
在指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路之后，指示第一UE开启D2D发现过程或者D2D连接建立过程，并指示第二UE监听D2D发现过程或者D2D连接建立过程。
这样以便恢复D2D通信链路。
本发明实施例提供了一种无线链路失败的处理装置，该无线链路失败的处理装置包括处理器和数据收发机，其中：
所述处理器被配置为用于确定在第一用户设备UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
所述数据收发机在所述处理器的控制下收发数据。
附图说明
图1为现有技术网络集中控制的方式示意图；
图2为现有技术设备间通信模式示意图；
图3为现有技术单播D2D通信示意图；
图4为本发明实施例提供的UE侧的一种无线链路失败的处理方法流程示意图；
图5为本发明实施例提供的基站侧的一种无线链路失败的处理方法流程示意图；
图6为本发明提供的实施例1中无线链路失败的处理方法示意图；
图7为本发明提供的实施例2中无线链路失败的处理方法示意图；
图8为本发明提供的实施例3中无线链路失败的处理方法示意图；
图9为本发明实施例提供的UE侧的一种无线链路失败的处理装置示意图；
图10为本发明实施例提供的基站侧的一种无线链路失败的处理装置示意图。
具体实施方式
本发明分别在设备侧和基站侧提供了一种无线链路失败的处理方法及装置，用以避免在发生无线链路失败(Radio Link Failure，RLF)时，进行设备间D2D通信的两UE均对该无线链路失败进行处理，在保证D2D通信能及时转换或及时恢复的情况下避免信令及资源的浪费，节约了UE的耗电，提高了设备的工作效率。
如图4所示，在设备侧，本发明提供了一种无线链路失败的处理方法，该方法包括：
S41、当第一用户设备UE与第二UE间的设备间D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理，而第二UE不需要对无线链路失败进行处理；
S42、第一UE针对该无线链路失败进行处理。
其中，第一UE确定该无线链路失败需要由该第一UE处理，可以采用以下三种方式之一：
方式一：根据基站侧的指示，确定该无线链路失败需要由该第一UE处理；例如基站根据基站到UE之间的参考信号接收功率(Reference signal received power，RSRP)或参考信号接收质量(Reference Signal Received Quality，RSRQ)，或者信道质量指示(Channel Quality Indicator，CQI)，选择D2N(Device to Network，设备与网络节点间)质量比较好，即RSRP、RSRQ或者CQI比较高的UE作为处理无线链路失败的UE，并通过显示信令通知进行D2D通信的UE对，例如：当第一UE与第二UE进行D2D通信时，比较两UE与eNB之间的信道质量RSRQ，如果第一UE与eNB之间的RSRQ值大于第二UE与eNB之间的RSRQ值，则选择第一UE作为处理无线链路失败的UE；
方式二：当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；
方式三：当第一UE为D2D通信中作为发送层2(L2)数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
需要说明的是，在D2D通信过程中，选择处理无线链路失败的UE有多种选择方式，不局限于本发明提供的上述选择方式。
第一UE针对该无线链路失败进行处理，可以采用如下两种方式之一：
方式一：第一UE自行发起链路恢复过程；具体包括：第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程；第一UE通知基站终止对第一UE与第二UE之间的D2D通信链路的资源分配；可选的，第一UE通知UE高层该D2D通信的过程中发生了无线链路失败，第一UE将D2D链路承载转换到D2N链路上。
方式二：第一UE通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败，并根据基站的指示，终止第一UE与第二UE之间的D2D链路，进入D2D RRC idle态，并根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上，主动或者根据基站指示发起D2D发现或者D2D连接建立过程。
在上述方式一与方式二中，第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程的同时，该方法还包括：
第一UE开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程；其中，D2D链路恢复定时器可以是用户设定的，或者通过D2D通信的Server与UE侧的交互，设定该定时器。
当第一UE不需要对无线链路失败进行处理时，例如，在第一UE与第三UE(本发明实施例中，第三UE与第二UE可以为同一UE，也可以为不同的UE)进行D2D通信过程中，若发生无线链路失败，并且该无线链路失败不需要由第一UE处理，则有：
当第一UE在与第三UE进行D2D通信过程中，第一UE确定该D2D通信过程中发生的无线链路失败不需要由该第一UE处理时，第一UE根据基站侧指示，进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号；可选的，第一UE根据基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上。
当第一UE与第三UE间的D2D通信发生无线链路失败后，确定该无线链路失败不需要由该第一UE处理时，第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号；
其中，在第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，该方法还包括：
第一UE开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程；其中，D2D链路恢复定时器可以是用户设定的，或者通过D2D通信的Server与UE侧的交互，设定该定时器。
同理，第一UE确定无线链路失败不需要由该第一UE处理，可以采用以下三种方式之一：
方式一：根据基站侧的指示，确定在第一UE与第三UE进行D2D通信 过程中发生的无线链路失败不需要由该第一UE处理；例如基站根据基站到UE之间的参考信号接收功率(Reference signal received power，RSRP)或参考信号接收质量(Reference Signal Received Quality，RSRQ)，或者信道质量指示(Channel Quality Indicator，CQI)，选择D2N质量比较好，即RSRP、RSRQ或者CQI比较高的UE作为处理无线链路失败的UE，则，另一UE即为不需要处理无线链路失败的UE，并通过显示信令通知进行D2D通信的UE对；
方式二：当第一UE不是发起D2D通信请求的UE时，确定该无线链路失败不需要由该第一UE处理；
方式三：当第一UE不是D2D通信中作为发送层2(L2)数据包或者IP数据包的UE时，确定该无线链路失败不需要由该第一UE处理。
在上述方法中，UE检测D2D通信过程中是否发生无线链路失败的方法，例如：
当UE检测到D2D通信过程中链路的信号质量低于某门限值且持续一段时间，例如RSRQ小于-12dB且这种情况持续了1s时；或者
D2D数据包的发送重传次数达到最大值，如无线链路控制(Radio Link Control，RLC)重传次数达到4次；或者
一定时间内未收到对端发送的数据，如UE在5s内未收到对端发送的数据时，则认为D2D通信过程中发生了无线链路失败。
相应地，如图5所示，在基站侧，本发明提供了一种无线链路失败的处理方法，该方法包括：
S51、基站确定在第一用户设备UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
S52、基站通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理。
较佳地，该方法还包括：
基站接收第一UE发送的第一UE与第二UE之间的D2D通信链路发生 无线链路失败的通知。
较佳地，基站接收到所述通知后，该方法还包括：基站终止对第一UE与第二UE之间的D2D链路的D2D资源分配
较佳地，基站终止对第一UE与第二UE之间的D2D链路的D2D资源分配之后，该方法还包括：
基站发起链路恢复过程。
其中，基站根据第一UE的通知，发起链路恢复过程，包括：基站指示所述第一UE和第二UE终止D2D通信过程，并建立设备与网络节点间的通信D2N链路；基站指示第一UE开启D2D发现过程或者D2D连接建立过程，并指示第二UE监听D2D发现过程或者D2D连接建立过程。
下面以具体的实施例详细说明本发明的方法，实施例中每一对进行D2D通信的UE在无线资源控制(Radio Resource Control，RRC)层可能有两种状态，一种是D2D连接态，在此状态下可与对端UE进行D2D通信，当该D2D通信对之间的D2D链路被删除或者不存在时，进入另一种状态，即D2D idle态，此状态下UE通过D2D Discovery过程或者D2D连接建立过程，在与D2D通信对端UE进行相关交互后，进入D2D连接态。
实施例1
在网场景下，D2D通信过程中发生无线链路失败时，UE通知基站侧进行处理。
如图6所示，具体处理过程如下：
S600：基站确定在第一UE与第二UE进行D2D通信的过程中，第一UE需要处理发生的无线链路失败，第二UE不需要处理发生的无线链路失败；
S601：基站通知第一UE需要处理发生的无线链路失败，通知第二UE不需要处理发生的无线链路失败；
其中，上述步骤S600和S601是可选的步骤，在UE自己确定是否需要处理发生的无线链路失败时，不需要执行。
S602：第一UE确定需要处理发生的无线链路失败，第二UE确定不需要 处理发生的无线链路失败；
S603：第一UE检测在D2D通信的过程中是否发生了无线链路失败；
S604：当第一UE检测到D2D通信的过程中发生无线链路失败时，向基站发送D2D通信发生无线链路失败的通知；
S605：基站根据第一UE的通知，终止对第一UE与第二UE之间的D2D通信链路的资源分配；
S606：基站指示第一UE和第二UE终止D2D通信链路，建立设备与网络节点间的通信D2N链路；
S607：可选地，基站指示第一UE开启D2D发现过程或D2D连接建立过程。
S608：可选地，基站指示第二UE监听D2D发现信号或者D2D连接建立过程中的请求信号。
S609：第一UE根据步骤S606中基站的指示，终止D2D通信链路，建立D2N链路。将D2D承载转换到D2N承载上，主动或者根据步骤S607中基站的指示，进入D2D RRC idle态，发起D2D发现或者D2D连接建立过程。与此同时，可选地，可以开启D2D链路恢复定时器；
S610：第二UE根据步骤S606中基站的指示，终止D2D通信链路，建立D2N链路。主动或者根据步骤S608中基站的指示，进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号。与此同时，可选地，可以同时开启D2D链路恢复定时器。
其中，第一UE在发起D2D发现过程或者D2D连接建立初始过程时，会开启D2D链路恢复定时器；在第二UE检测到D2D通信过程中发生无线链路失败，并开始监听D2D发现信号或者D2D连接建立初始过程中的请求信号时，第二UE也会开启D2D链路恢复定时器。
D2D链路恢复定时器的定时时长，可以是用户设定的，或者通过D2D通信的服务器与UE侧的交互，设定的。例如可以设置为20s或者1分钟。D2D链路恢复定时器超时后，第一UE或第二UE会向UE高层发送D2D链路恢 复失败的指示消息，供UE高层进一步决策用，例如：UE的用户界面会显示D2D链路失败，提示用户是否继续执行D2D链路恢复过程。
其中，UE检测D2D通信过程中是否发生无线链路失败的方法如下：
当UE检测到D2D通信过程中链路的信号质量低于某门限值且持续一段时间，例如RSRQ小于-12dB且这种情况持续了1s时；或者
D2D数据包的发送重传次数达到最大值，如无线链路控制(Radio Link Control，RLC)重传次数达到4次；或者
一定时间内未收到对端UE发送的数据，如UE在5s内未收到对端UE发送的数据时，则认为D2D通信过程中发生了无线链路失败。
基站确定处理无线链路失败的UE的方法包括：基站侧根据之前的测量上报，获得参与D2D通信对的两UE与基站之间各自的参考信号接收功率(Reference signal received power，RSRP)、参考信号接收质量(Reference Signal Received Quality，RSRQ)和信道质量指示(Channel Quality Indicator，CQI)，选择D2N质量比较好，即RSRP、RSRQ或者CQI比较高的UE作为处理无线链路失败的UE；或者，当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理；
具体地，基站通过RRC消息通知D2D通信对中的UE是否作为负责D2D链路RLF后的处理的UE，例如，基站侧将携带有1bit的指示信息的RRC消息发送给UE，该指示信息用于指示UE是否为处理RLF的UE，若该指示信息为true，则指示UE为处理RLF的UE，否则，若该指示信息为false，则指示UE不是处理RLF的UE，因此，收到RRC消息中该指示信息为true的UE，则确定本UE为处理RLF的UE；收到的RRC消息中没有该指示信息，或者该指示信息为false的UE，则确定本UE不作为处理RLF的UE。
通过上述处理过程，在D2D通信过程中发生RLF时，避免了进行D2D通信的两UE均告知基站侧RLF的发生；同时，上述处理过程，确定了在发 生RLF时，哪个UE负责处理D2D通信过程中发生的RLF，避免了UE在检测D2D通信链路恢复过程中，既需要作为发送者，又需要作为监听者，如通过上述方式，负责处理D2D通信过程中发生的RLF的UE，只需要广播D2D发现信号，不负责处理D2D通信过程中发生的RLF的UE，只需要在发现过程中监听D2D发现信号，从而进一步避免了信令及资源的浪费，节约了UE的耗电，提高系统的工作效率。
实施例2
在网情况下，发生无线链路失败时UE发起自行的链路恢复过程，但需要通知网络侧。
如图7所示，具体处理过程如下：
S700：基站确定在第一UE与第二UE进行D2D通信的过程中，第一UE需要处理发生的无线链路失败，第二UE不需要处理发生的无线链路失败；
S701：基站通知第一UE需要处理发生的无线链路失败，通知第二UE不需要处理发生的无线链路失败；
其中，上述步骤S700和S701是可选的步骤，在UE自己确定是否需要处理发生的无线链路失败时，不需要执行。
S702：第一UE确定需要处理发生的无线链路失败，第二UE确定不需要处理发生的无线链路失败；
S703：当第一UE检测到D2D通信的过程中发生无线链路失败RLF时，第一UE发起自行链路恢复过程，进入D2D RRC idle态，开启D2D发现过程或D2D连接建立过程；与此同时，可选地，可以开启D2D链路恢复定时器；
S704：可选的，第一UE通过RRC消息通知基站D2D通信过程中发生无线链路失败；
S705：基站根据步骤704所述第一UE的通知，终止对第一UE与第二UE之间的D2D通信链路的资源分配；
S706：当第二UE检测到D2D通信的过程中发生无线链路失败RLF时，进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的 请求信号；与此同时，可选地，可以开启D2D链路恢复定时器。
在步骤703中，可选的，第一UE通知UE高层该D2D通信的过程中发生了无线链路失败，将D2D链路承载转换到D2N链路上；可选的，第一UE触发UE高层发起D2D发现过程或D2D连接建立过程，并进一步通知网络侧第一UE在与第二UE的D2D通信的过程中发生了无线链路失败。
UE检测D2D通信过程中是否发生无线链路失败的方法如下：
当UE检测到D2D通信过程中链路的信号质量低于某门限值且持续一段时间，例如RSRQ小于-12dB且这种情况持续了1s时；或者
D2D数据包的发送重传次数达到最大值，如无线链路控制(Radio Link Control，RLC)重传次数达到4次；或者
一定时间内未收到对端发送的数据，如UE在5s内未收到对端发送的数据时，则认为D2D通信过程中发生了无线链路失败。
基站确定处理无线链路失败的UE的方法包括：基站侧根据之前的测量上报，获得参与D2D通信对的两UE与基站之间各自的参考信号接收功率(Reference signal received power，RSRP)、参考信号接收质量(Reference Signal Received Quality，RSRQ)和信道质量指示(Channel Quality Indicator，CQI)，选择D2N质量比较好，即RSRP、RSRQ或者CQI比较高的UE作为处理无线链路失败的UE；或者，当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
具体地，基站通过RRC消息通知D2D通信对中的UE是否作为负责D2D链路RLF后的处理的UE，例如，基站侧将携带有1bit指示信息的RRC消息发送给UE，该指示信息用于指示UE是否为处理RLF的UE，若该指示信息为true，则指示UE为处理RLF的UE，否则，若该指示信息为false，则指示UE不是处理RLF的UE，因此，收到RRC消息中该指示信息为true的UE，则确定本UE为处理RLF的UE；收到的RRC消息中没有该指示信息，或者 该指示信息为false的UE，则确定本UE不作为处理RLF的UE。
通过上述处理过程，在D2D通信过程中发生RLF时，避免了进行D2D通信的两UE均告知基站侧RLF的发生；同时，上述处理过程，确定了在发生RLF时，哪个UE负责处理D2D通信过程中发生的RLF，避免了UE在检测D2D通信链路恢复过程中，既需要作为发送者，又需要作为监听者，如通过上述方式，负责处理D2D通信过程中发生的RLF的UE，只需要广播D2D发现信号，不负责处理D2D通信过程中发生的RLF的UE，只需要在发现过程中监听D2D发现信号，从而进一步避免了信令及资源的浪费，节约了UE的耗电，提高系统的工作效率。
实施例3
在网或脱网情况下，在D2D通信过程中发生无线链路失败时UE发起自行的链路恢复过程。
如图8所示，具体处理过程如下：
S80：在第一UE与第二UE进行D2D通信的过程中，确定第一UE需要处理发生的无线链路失败，第二UE不需要处理发生的无线链路失败；
S81：当第一UE检测到发生无线链路失败时，第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立初始过程；与此同时，可选地，可以开启D2D链路恢复定时器；
S82：当第二UE检测到发生无线链路失败时，第二UE进入D2D RRC idle态；与此同时，可选地，可以开启D2D链路恢复定时器；
S83：第二UE监听D2D发现信号或者D2D连接建立初始过程中的请求信号。
较佳地，如果是在网情况，则第一UE需要向UE高层发送D2D通信过程中发生了无线链路失败的指示消息，触发UE高层进行D2D到D2N的链路转换；可选的，该指示消息进一步触发UE高层发起D2D发现过程或者D2D连接建立过程；可选的，第二UE需要向UE高层发送D2D通信过程中发生了无线链路失败的指示消息，触发UE高层进行D2D到D2N的链路转换。
具体的，基站确定处理无线链路失败的UE的方法包括：基站侧根据之前的测量上报，获得参与D2D通信对的两UE与基站之间各自的参考信号接收功率(Reference signal received power，RSRP)、参考信号接收质量(Reference Signal Received Quality，RSRQ)和信道质量指示(Channel Quality Indicator，CQI)，选择D2N质量比较好，即RSRP、RSRQ或者CQI比较高的UE作为处理无线链路失败的UE；或者，当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
UE检测D2D通信过程中是否发生无线链路失败的方法如下：
当UE检测到D2D通信过程中链路的信号质量低于某门限值且持续一段时间，例如RSRQ小于-12dB且这种情况持续了1s时；或者
D2D数据包的发送重传次数达到最大值，如无线链路控制(Radio Link Control，RLC)重传次数达到4次；或者
一定时间内未收到对端发送的数据，如UE在5s内未收到对端发送的数据时，则认为D2D通信过程中发生了无线链路失败。
通过上述处理过程，在D2D通信过程中发生RLF时，避免了进行D2D通信的两UE均告知基站侧RLF的发生；同时，上述处理过程，确定了在发生RLF时，哪个UE负责处理D2D通信过程中发生的RLF，避免了UE在检测D2D通信链路恢复过程中，既需要作为发送者，又需要作为监听者，如通过上述方式，负责处理D2D通信过程中发生的RLF的UE，只需要广播D2D发现信号，不负责处理D2D通信过程中发生的RLF的UE，只需要在发现过程中监听D2D发现信号，从而进一步避免了信令及资源的浪费，节约了UE的耗电，提高系统的工作效率。
如图9所示，在UE侧，本发明实施例提供了一种无线链路失败的处理装置，该无线链路失败的处理装置具体为第一UE，该装置包括：
第一确定模块91，用于当第一UE与第二UE间的D2D通信发生无线链 路失败后，确定该无线链路失败需要由该第一UE处理；
第一处理模块92，用于针对该无线链路失败进行处理。
较佳地，第一确定模块91在确定该无线链路失败需要由该第一UE处理时，具体用于：
根据基站侧的指示，确定该无线链路失败需要由该第一UE处理；或者，
当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，
当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
较佳地，第一处理模块92，具体用于：
自行发起链路恢复过程；或者，
通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败，并根据基站的指示，终止第一UE与第二UE之间的D2D链路，进入D2D RRC idle态，并根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上，主动或者根据基站指示发起D2D发现或者D2D连接建立过程。
较佳地，当第一处理模块92用于自行发起链路恢复过程时，第一处理模块92，具体用于：令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程。
较佳地，当第一处理模块92用于自行发起链路恢复过程时，第一处理模块92，还用于：通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败。
较佳地，当第一处理模块92用于自行发起链路恢复过程时，第一处理模块92，还用于：将D2D链路承载转换到D2N链路上。
较佳地，第一处理模块92还用于：在令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程的同时，开启D2D链路恢复定 时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程
较佳地，该装置还包括：
第二确定模块，用于在第一UE与第三UE进行D2D通信过程中，确定该D2D通信过程中发生的无线链路失败不需要由该第一UE处理；
第二处理模块，用于根据基站侧指示，触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号。
较佳地，第二处理模块还用于：
根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上。
较佳地，第二处理模块还用于：在触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
较佳地，该装置还包括：
第三确定模块，用于当第一UE与第三UE间的D2D通信发生无线链路失败后，确定该无线链路失败不需要由该第一UE处理；
第三处理模块，用于触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号。
较佳地，第三处理模块还用于：在触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
具体的，第一确定模块91、第一处理模块92、第二确定模块、第二处理模块、第三确定模块、以及第三处理模块可以是处理器等实体，本发明不局限于实现这些模块的实体。
本发明实施例提供了一种无线链路失败的处理装置，该无线链路失败的 处理装置包括处理器和数据收发机，其中：
所述处理器被配置为用于当第一UE与第二UE间的D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；针对该无线链路失败进行处理；
所述数据收发机在所述处理器的控制下收发数据。
如图10所示，在基站侧，本发明实施例提供了一种无线链路失败的处理装置，该装置包括：
确定模块101，用于确定在第一用户设备UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
通知模块102，用于通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理。
较佳地，通知模块102还用于：
通知所述第二UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败不需要由该第二UE处理。
较佳地，该装置还包括：
接收模块，用于接收第一UE发送的第一UE与第二UE之间的D2D通信链路发生无线链路失败的通知。
较佳地，该装置还包括：
处理模块，用于在所述接收模块接收到所述通知后，终止对第一UE与第二UE之间的D2D链路的D2D资源分配。
较佳地，处理模块还用于：在终止对第一UE与第二UE之间的D2D链路的D2D资源分配之后，发起链路恢复过程；
较佳地，处理模块在发起链路恢复过程时，具体用于：
指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路。
较佳地，处理模块在发起链路恢复过程时，还用于：
在指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路之后，指示第一UE开启D2D发现过程或者D2D连接建立过程，并指示第二 UE监听D2D发现过程或者D2D连接建立过程。
具体的，确定模块101和处理模块可以是处理器等实体，通知模块102和接收模块可以具有收发功能的传输模块实现，例如通知模块102和接收模块可以是天线等设备，本发明不局限于实现这些模块的实体。
本发明实施例提供了一种无线链路失败的处理装置，该无线链路失败的处理装置包括处理器和数据收发机，其中：
所述处理器被配置为用于确定在第一用户设备UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
所述数据收发机在所述处理器的控制下收发数据。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或 多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (37)

  1. 一种无线链路失败的处理方法，其特征在于，该方法包括：
    当第一用户设备UE与第二UE间的设备间D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；
    第一UE针对该无线链路失败进行处理。
  2. 根据权利要求1所述的方法，其特征在于，确定该无线链路失败需要由该第一UE处理，包括：
    根据基站侧的指示，确定该无线链路失败需要由该第一UE处理；或者，
    当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，
    当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
  3. 根据权利要求1所述的方法，其特征在于，第一UE针对该无线链路失败进行处理，包括：
    第一UE自行发起链路恢复过程；或者，
    第一UE通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败，并根据基站的指示，终止第一UE与第二UE之间的D2D链路，进入设备间无线资源控制空闲D2D RRC idle态，并根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上，主动或者根据基站指示发起D2D发现或者D2D连接建立过程。
  4. 根据权利要求3所述的方法，其特征在于，第一UE自行发起链路恢复过程，包括：第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程。
  5. 根据权利要求4所述的方法，其特征在于，第一UE自行发起链路恢复过程，还包括：第一UE通知基站第一UE与第二UE之间的D2D通信链 路发生无线链路失败。
  6. 根据权利要求4所述的方法，其特征在于，第一UE自行发起链路恢复过程，还包括：第一UE将D2D链路承载转换到设备与网络节点间D2N链路上。
  7. 根据权利要求3、4、5或6所述的方法，其特征在于，第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程的同时，该方法还包括：
    第一UE开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
  8. 根据权利要求1所述的方法，其特征在于，该方法还包括：
    第一UE在与第三UE进行D2D通信过程中，确定该D2D通信过程中发生的无线链路失败不需要由该第一UE处理；
    第一UE根据基站侧指示，进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号。
  9. 根据权利要求8所述的方法，其特征在于，该方法还包括：
    第一UE根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上。
  10. 根据权利要求1所述的方法，其特征在于，该方法还包括：
    当第一UE与第三UE间的D2D通信发生无线链路失败后，确定该无线链路失败不需要由该第一UE处理；
    第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号。
  11. 根据权利要求8或10所述的方法，其特征在于，第一UE进入D2DRRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，该方法还包括：
    第一UE开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
  12. 一种无线链路失败的处理方法，其特征在于，该方法包括：
    基站确定在第一用户设备UE与第二UE进行设备间D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
    基站通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理。
  13. 根据权利要求12所述的方法，其特征在于，该方法还包括：
    基站通知所述第二UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败不需要由该第二UE处理。
  14. 根据权利要求12所述的方法，其特征在于，该方法还包括：
    基站接收第一UE发送的第一UE与第二UE之间的D2D通信链路发生无线链路失败的通知。
  15. 根据权利要求14所述的方法，其特征在于，基站接收到所述通知后，该方法还包括：基站终止对第一UE与第二UE之间的D2D链路的D2D资源分配。
  16. 根据权利要求15所述的方法，其特征在于，基站终止对第一UE与第二UE之间的D2D链路的D2D资源分配之后，该方法还包括：
    基站发起链路恢复过程。
  17. 根据权利要求16所述的方法，其特征在于，基站发起链路恢复过程，包括：
    基站指示所述第一UE和第二UE终止D2D通信过程，并建立设备与网络节点间D2N链路。
  18. 根据权利要求16所述的方法，其特征在于，基站发起链路恢复过程，还包括：
    基站在指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路之后，基站指示第一UE开启D2D发现过程或者D2D连接建立过程，并指示第二UE监听D2D发现过程或者D2D连接建立过程。
  19. 一种无线链路失败的处理装置，其特征在于，该装置包括：
    第一确定模块，用于当第一UE与第二UE间的设备间D2D通信发生无线链路失败后，确定该无线链路失败需要由该第一UE处理；
    第一处理模块，用于针对该无线链路失败进行处理。
  20. 根据权利要求19所述的装置，其特征在于，所述第一确定模块在确定该无线链路失败需要由该第一UE处理时，具体用于：
    根据基站侧的指示，确定该无线链路失败需要由该第一UE处理；或者，
    当第一UE为发起D2D通信请求的UE时，确定该无线链路失败需要由该第一UE处理；或者，
    当第一UE为D2D通信中作为发送层2数据包或者IP数据包的UE时，确定该无线链路失败需要由该第一UE处理。
  21. 根据权利要求19所述的装置，其特征在于，所述第一处理模块，具体用于：
    自行发起链路恢复过程；或者，
    通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败，并根据基站的指示，终止第一UE与第二UE之间的D2D链路，进入设备间无线资源控制空闲D2D RRC idle态，并根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上，主动或者根据基站指示发起D2D发现或者D2D连接建立过程。
  22. 根据权利要求21所述的装置，其特征在于，当所述第一处理模块用于自行发起链路恢复过程时，所述第一处理模块，具体用于：令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程。
  23. 根据权利要求22所述的装置，其特征在于，当所述第一处理模块用于自行发起链路恢复过程时，所述第一处理模块，还用于：通知基站第一UE与第二UE之间的D2D通信链路发生无线链路失败。
  24. 根据权利要求22所述的装置，其特征在于，当所述第一处理模块用于自行发起链路恢复过程时，所述第一处理模块，还用于：将D2D链路承载 转换到设备与网络节点间D2N链路上。
  25. 根据权利要求21、22、23或24所述的装置，其特征在于，所述第一处理模块还用于：在令第一UE进入D2D RRC idle态，并发起D2D发现过程或者D2D连接建立过程的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
  26. 根据权利要求19所述的装置，其特征在于，该装置还包括：
    第二确定模块，用于在第一UE与第三UE进行D2D通信过程中，确定该D2D通信过程中发生的无线链路失败不需要由该第一UE处理；
    第二处理模块，用于根据基站侧指示，触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立过程中的请求信号。
  27. 根据权利要求26所述的装置，其特征在于，所述第二处理模块还用于：
    根据所述基站的指示，建立设备与网络节点间D2N链路，将D2D承载转换到D2N承载上。
  28. 根据权利要求19所述的装置，其特征在于，所述第二处理模块还用于：在触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
  29. 根据权利要求19所述的装置，其特征在于，该装置还包括：
    第三确定模块，用于当第一UE与第三UE间的D2D通信发生无线链路失败后，确定该无线链路失败不需要由该第一UE处理；
    第三处理模块，用于触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号。
  30. 根据权利要求29所述的装置，其特征在于，所述第三处理模块还用于：在触发第一UE进入D2D RRC idle态，监听D2D发现信号或者D2D连接建立初始过程中的请求信号的同时，开启D2D链路恢复定时器，当所述D2D链路恢复定时器超时时，提示用户是否继续执行D2D链路恢复过程。
  31. 一种无线链路失败的处理装置，其特征在于，该装置包括：
    确定模块，用于确定在第一用户设备UE与第二UE进行设备间D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理；
    通知模块，用于通知该第一UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败需要由该第一UE处理。
  32. 根据权利要求31所述的装置，其特征在于，所述通知模块还用于：
    通知所述第二UE在第一UE与第二UE进行D2D通信的过程中，对于发生的无线链路失败不需要由该第二UE处理。
  33. 根据权利要求31所述的装置，其特征在于，该装置还包括：
    接收模块，用于接收第一UE发送的第一UE与第二UE之间的D2D通信链路发生无线链路失败的通知。
  34. 根据权利要求33所述的装置，其特征在于，该装置还包括：
    处理模块，用于在所述接收模块接收到所述通知后，终止对第一UE与第二UE之间的D2D链路的D2D资源分配。
  35. 根据权利要求34所述的装置，其特征在于，所述处理模块还用于：在终止对第一UE与第二UE之间的D2D链路的D2D资源分配之后，发起链路恢复过程。
  36. 根据权利要求35所述的装置，其特征在于，所述处理模块在发起链路恢复过程时，具体用于：
    指示所述第一UE和第二UE终止D2D通信过程，并建立设备与网络节点间D2N链路。
  37. 根据权利要求35所述的装置，其特征在于，所述处理模块在发起链路恢复过程时，还用于：
    在指示所述第一UE和第二UE终止D2D通信过程，并建立D2N链路之后，指示第一UE开启D2D发现过程或者D2D连接建立过程，并指示第二UE监听D2D发现过程或者D2D连接建立过程。
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