JP6478195B2 - Link failure recovery method and apparatus - Google Patents

Description

  The present invention relates to the field of communication systems, and more particularly to a link failure recovery method and apparatus.

  Certain network deployments are being introduced into next generation wireless networks. In this type of deployment, one base station can serve two different cells and the user equipment can simultaneously maintain a connection to the two different cells served by the base station. Of the two cells that keep the connection to the user equipment at the same time, one is the primary serving cell and the other is the secondary serving cell.

  In the prior art, after the user equipment detects that a radio link failure has occurred in the connection between the user equipment and the primary serving cell, the connection can be recovered from the radio link failure using a re-establishment process. it can. In the process, a Signaling Radio Bearer (SRB) between the user equipment and the base station is re-established, and security between the user equipment and the base station is reactivated. In new types of network deployments, the primary and secondary serving cells may belong to different base stations. The base station to which the primary serving cell belongs may be referred to as a primary base station, and the base station to which the secondary serving cell belongs may be referred to as a secondary base station. When the user equipment detects that a radio link failure has occurred in the connection between the user equipment and the secondary base station, in the prior art, the signaling radio bearer between the user equipment and the primary base station is still re-established and the user Security between the device and the primary base station is activated again.

  However, it is unlikely that a radio link failure has occurred between the user equipment and the primary base station at this point. In this case, there is no need to re-establish a signal transmission radio bearer between the terminal and the primary base station, and there is no need to reactivate security between the user equipment and the primary base station. As a result, unnecessary information exchange between the user equipment and the primary base station is increased, and network resources are wasted.

  The present invention provides a link failure recovery method and apparatus. As a result, unnecessary information exchange between the user equipment and the primary base station is avoided, and the utilization efficiency of network resources is increased.

  The technical solutions used in the embodiments of the present invention are as follows.

  In a first aspect of the present invention, a step of receiving failure report information transmitted by a user equipment by a primary base station, wherein the failure report information is an identifier of a failed secondary serving cell or a failed data radio bearer DRB. The failure secondary serving cell is controlled by the secondary base station, the failure DRB is carried on the radio link between the failure secondary serving cell and the user equipment, and the primary base station according to the failure report information. Acquiring a DRB identifier that requires reconfiguration by a station, reconfiguring parameters relating to a DRB that requires reconfiguration, and transmitting a first reconfiguration message to a user equipment by a primary base station. Thus, the first reconfiguration message is the DRB that needs to be reconfigured. Besshi and reconstitution provides a link failure recovery method comprising the steps of containing the parameters reconstructed for the DRB necessary.

  In the second aspect of the present invention, the primary base station is a step of receiving failure report information transmitted by the secondary base station, wherein the failure report information includes an identifier of the failed user equipment, or an identifier of the failed user equipment and A step including an identifier of a failed secondary serving cell or an identifier of a failed user equipment and an identifier of a failed radio access bearer E-RAB, and a data radio bearer DRB that needs to be reconfigured by the primary base station according to the failure report information And reconfiguring parameters relating to DRB that needs reconfiguration, and transmitting a first reconfiguration message from the primary base station to the user equipment, so that the user equipment can identify the DRB that needs reconfiguration. Reconfiguring according to the first reconfiguration message , The first re-configuration message providing a link failure recovery method comprising the steps of containing the parameters reconstructed for the identifier and the DRB of reconfiguration is required DRB.

In the third aspect of the present invention, the user equipment transmits failure report information to the primary base station, and the primary base station acquires an identifier of the DRB that needs to be reconfigured according to the failure report information, The failure report information is an identifier of a failed secondary serving cell or an identifier of a failed data radio bearer DRB, and the failed secondary serving cell is a secondary Controlled by the base station, the failed DRB is carried on the radio link between the failed secondary serving cell and the user equipment, and the user equipment receives a reconfiguration message transmitted by the primary base station. Therefore, the reconfiguration message contains the identifier of the DRB that needs to be reconfigured And steps including the parameters reconstructed for DRB, in accordance with the reconfiguration message by a user equipment, providing a link failure recovery method comprising the steps of reconstruction to reconstruct the DRB necessary.

  In the fourth aspect of the present invention, the secondary base station transmits failure report information to the primary base station, and the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information. Reconfiguring parameters relating to DRB that need to be configured, wherein the failure report information includes an identifier of a failed user equipment, or an identifier of a failed user equipment and an identifier of a failed secondary serving cell, or a failed user Provided is a link failure recovery method including steps of equipment identifier and failure E-RAB identifier.

  According to a fifth aspect of the present invention, there is provided a receiving unit configured to receive failure report information transmitted by a user equipment, wherein the failure report information includes a failure secondary serving cell identifier or a failure data radio bearer. DRB identifier, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is in accordance with the receiving unit carried on the radio link between the failed secondary serving cell and the user equipment, and the failure report information An acquisition unit configured to acquire an identifier of a DRB that needs reconfiguration, a configuration unit configured to reconfigure parameters related to a DRB that needs reconfiguration, and a first reconfiguration message A transmission unit configured to transmit to a device, the first reconfiguration message Provide a link failure recovery system and a transmission unit including a reconstructed against the DRB required identifiers and reconfiguration of reconfiguration is required DRB parameters.

  In a sixth aspect of the present invention, a reception unit configured to receive failure report information transmitted by a secondary base station, wherein the failure report information includes a reception unit including an identifier of a failed user equipment, The identifier of the data radio bearer DRB that needs to be reconfigured according to the failure report information, or the identifier of the failed user equipment and the identifier of the failed secondary serving cell, or the identifier of the failed user equipment and the identifier of the failed radio access bearer E-RAB An acquisition unit configured to acquire the configuration unit, a configuration unit configured to reconfigure parameters related to the DRB that needs to be reconfigured, and a first reconfiguration message configured to send to the user equipment The first reconfiguration message is a transmitting unit and the DRB identifier and reconfiguration required Provide a link failure recovery system and a transmission unit including a parameter reconstructed for fine the DRB.

  In the seventh aspect of the present invention, the failure report information is transmitted to the primary base station, and the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and the DRB that needs to be reconfigured The failure reporting information is an identifier of a failed secondary serving cell or an identifier of a failed data radio bearer DRB, and is configured to reconfigure parameters related to the failed secondary serving cell Is controlled by the secondary base station, and the failed DRB is configured to receive a transmission unit carried on the radio link between the failed secondary serving cell and the user equipment and a reconfiguration message transmitted by the primary base station. The reconfiguration message is an identifier of the DRB that needs to be reconfigured. And a receiving unit including a parameter reconfigured for the DRB, and a configuration unit configured to reconfigure a DRB that needs to be reconfigured according to the reconfiguration message. .

  In the eighth aspect of the present invention, the failure report information is transmitted to the primary base station, and the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and the DRB that needs to be reconfigured A transmission unit configured to reconfigure parameters relating to, wherein the failure report information includes an identifier of a failed user equipment, or an identifier of a failed user equipment and an identifier of a failed secondary serving cell, or a failure Provided is a link failure recovery apparatus comprising a transmission unit which is an identifier of a user equipment and an identifier of a failure E-RAB.

  In the link failure recovery method and apparatus provided in the embodiments of the present invention, the primary base station first receives failure report information transmitted by the user equipment, and determines the DRB identifier that needs to be reconfigured according to the failure report information. Obtain and reconfigure the parameters for the DRB that need reconfiguration. Next, the primary base station transmits a first reconfiguration message to the user equipment so that the user equipment reconfigures the failed DRB according to the first reconfiguration message. Currently, when the user equipment detects that a radio link failure has occurred in the connection between the user equipment and the secondary base station, the signaling radio bearer between the user equipment and the primary base station is still re-established, Security between the primary base stations is activated again. However, it is unlikely that a radio link failure has occurred between the user equipment and the primary base station at this point. As a result, unnecessary information exchange between the user equipment and the primary base station is increased, and network resources are wasted. In the methods and apparatus provided in the embodiments of the present invention, it is not necessary to re-establish the signaling radio bearer between the user equipment and the primary base station, and it is necessary to reactivate the security between the user equipment and the primary base station. In other words, unnecessary information exchange between the user equipment and the primary base station is avoided, and the use efficiency of network resources is increased. Furthermore, the method and apparatus provided in the embodiments of the present invention enables the primary base station to more accurately identify the cause of the failure, thereby realizing link failure recovery at a lower cost.

  BRIEF DESCRIPTION OF THE DRAWINGS To describe the technical solutions in the embodiments of the present invention more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show only some embodiments of the present invention, and those skilled in the art can derive other drawings from these accompanying drawings without creative work.

3 is a flowchart of a link failure recovery method according to an embodiment of the present invention. 6 is a flowchart of another link failure recovery method according to an embodiment of the present invention. 6 is a flowchart of still another link failure recovery method according to an embodiment of the present invention. 6 is a flowchart of still another link failure recovery method according to an embodiment of the present invention. 1 is a schematic structural diagram of a link failure recovery apparatus according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention. FIG. 3 is a schematic structural diagram of another link failure recovery apparatus according to an embodiment of the present invention. FIG. 4 is a schematic structural diagram of another base station according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of still another link failure recovery apparatus according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. FIG. 6 is a schematic structural diagram of still another link failure recovery apparatus according to an embodiment of the present invention. FIG. 6 is a schematic structural diagram of still another base station according to an embodiment of the present invention.

  The following clearly describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

  In order to make the advantages of the technical solution of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

  In one embodiment of the present invention, a link failure recovery method is provided. As shown in FIG. 1, the method includes:

  At 101, the primary base station receives failure report information transmitted by the user equipment.

  The failure report information is an identifier of the failed secondary serving cell or an identifier of the failed data radio bearer DRB, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is the failed secondary serving cell and user equipment. Is carried on the radio link between.

  In some cases, the primary base station receives failure cause information transmitted by the user equipment. The failure cause information is that the maximum number of RLC uplink retransmissions has been reached, the maximum number of random access preamble retransmissions has been reached, or the timer T310 has expired.

  In some cases, before the step 101 or before the primary base station receives the failure cause information transmitted by the user equipment, the method further transmits a failure detection configuration message to the user equipment by the primary base station, There may be the step of causing the user equipment to determine the specific value of the failure secondary serving cell identifier or failure DRB identifier or failure cause message according to the failure detection configuration message. The message may specifically include one or more of a maximum number of RLC uplink retransmissions, a maximum number of random access preamble retransmissions, and a period of timer T310.

  In particular, when the maximum number of RLC uplink retransmissions is reached for a DRB carried on the radio link between the user equipment and the secondary serving cell, the user equipment has a secondary serving cell identifier that has failed secondary -It is determined that it is the identifier of the serving cell, or the user equipment determines that the identifier of the DRB is the identifier of the failed DRB. When the maximum number of random access preamble retransmissions has been reached, or when the time period of timer T310 has been reached in the secondary serving cell for the user equipment, the user equipment indicates that the secondary serving cell identifier has failed secondary It is determined that the identifier is the serving cell, or the user equipment determines that the identifier of the DRB carried on the radio link between the user equipment and the secondary serving cell is the identifier of the failed DRB.

  In 102, the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured.

  In particular, when the failure report information is an identifier of the failed secondary serving cell, the identifier of the DRB that is acquired by the primary base station and needs to be reconfigured is between the failed secondary serving cell and the user equipment. It is an identifier of DRB carried on the radio link. When the failure report information is the failure DRB identifier, the identifier of the DRB that is acquired by the primary base station and needs to be reconfigured is the failure DRB identifier.

  In some cases, the primary base station obtains the identifier of the secondary serving cell that needs to be deleted or the identifier of the radio access bearer E-RAB that needs to be deleted, according to the failure report information. The E-RAB has a one-to-one correspondence with the DRB.

  In particular, when the failure report information is the failure secondary serving cell identifier, the identifier of the secondary serving cell that needs to be acquired and deleted by the primary base station is the failure secondary serving cell identifier. The acquired identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the failed secondary serving cell and the user equipment . When the failure report information is an identifier of the failed data radio bearer DRB, the identifier of the secondary serving cell that is acquired by the primary base station and needs to be deleted is the identifier of the secondary serving cell that carries the failed DRB The acquired identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the E-RAB corresponding to the failed DRB.

  In some cases, when the failure cause information is that the maximum number of RLC uplink retransmissions has been reached, the primary base station reconfigures the maximum number of RLC uplink retransmissions for the DRB. When the failure cause information is that the maximum number of random access preamble retransmissions has been reached, the primary base station reconfigures the maximum number of preamble transmissions for the DRB. When the failure cause information is that the timer T310 has expired, the primary base station reconfigures the period of the timer T310 for the DRB.

  At 103, the primary base station transmits a first reconfiguration message to the user equipment. The first reconfiguration message includes the identifier of the DRB that needs to be reconfigured and the parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the first reconfiguration message.

  In some cases, the first reconfiguration message further needs to be deleted so that the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted. May include an identifier of a secondary serving cell.

  At 104, in some cases, the primary base station transmits a second reconfiguration message to the secondary base station so that the secondary base station releases resources to serve the user equipment according to the user equipment identifier. The second reconfiguration message includes the user equipment identifier.

  In some cases, the second reconfiguration message further causes the secondary base station to release the secondary serving cell that needs to be deleted or the E-RAB that needs to be deleted according to the second reconfiguration message. May include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In the link failure recovery method provided in this embodiment, it is not necessary to re-establish the signal transmission radio bearer between the user equipment and the primary base station, and it is not necessary to reactivate the security between the user equipment and the primary base station. The exchange of unnecessary information between the user equipment and the primary base station is avoided, and the use efficiency of network resources is increased.

  One embodiment of the present invention provides another link failure recovery method. As shown in FIG. 2, the method includes:

  In 201, the primary base station receives the failure report information transmitted by the secondary base station. The failure report information includes an identifier of the failed user equipment. In some cases, the failure report information may further include an identifier of the failed secondary serving cell or an identifier of the failed radio access bearer E-RAB.

  In some cases, prior to step 201, the method may further include the step of transmitting a failure detection configuration message to the secondary base station by the primary base station. The message specifically includes the maximum number of RLC downlink retransmissions, the maximum number of retransmissions of the physical downlink control channel (PDCCH) order for allocating dedicated random access resources, and the reception of random access requests. Or a threshold of a block error rate (BLER, Block Error Rate) or a bit error rate (BLER, Bit Error Rate) of the uplink data may be included. As a result, the secondary base station determines the identifier of the failed user equipment and the identifier of the failed secondary serving cell or the identifier of the failed E-RAB according to the failure detection configuration message.

  In particular, when the maximum number of RLC downlink retransmissions for a DRB carried by a secondary base station is reached, or when the BLER or BER threshold of uplink data is reached, the identifier of the user equipment to which the DRB belongs is The secondary base station determines that it is the identifier of the failed user equipment, and the secondary base station determines that the identifier of the secondary serving cell that carries the DRB is the identifier of the failed secondary serving cell, or The secondary base station determines that the identifier of the E-RAB corresponding to the DRB is the identifier of the failed E-RAB. Maximum attempt to receive a random access request sent by the user equipment when the maximum number of retransmissions for a PDCCH order used by the secondary base station sent to the user equipment is used to allocate dedicated random access resources The secondary base station determines that the identifier of the user equipment is an identifier of the failed user equipment, and the secondary base station has transmitted the PDCCH order or received the random access request. The serving cell identifier is determined to be the failed secondary serving cell identifier, or the secondary base station supports DRB carried on the radio link between the failed user equipment and the failed secondary serving cell The identifier of the E-RAB to be Determined to be a child.

  In 202, the primary base station acquires the identifier of the data radio bearer DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured.

  In particular, when the failure report information is an identifier of a failed user equipment, the identifier of the data radio bearer DRB that is acquired by the primary base station and needs to be reconfigured is the radio link between the failed user equipment and the secondary base station. It is an identifier of DRB carried in When the failure report information is an identifier of a failed user equipment and an identifier of a failed secondary serving cell, the identifier of the data radio bearer DRB that is acquired by the primary base station and needs to be reconfigured is the failure user equipment and the failure It is the identifier of the DRB carried on the radio link between the secondary serving cells. When the failure report information is the identifier of the failed user equipment and the identifier of the failed radio access bearer E-RAB, the identifier of the data radio bearer DRB that is acquired by the primary base station and needs to be reconfigured is the failed radio access A DRB identifier corresponding to the bearer E-RAB.

  In some cases, the primary base station obtains the identifier of the secondary serving cell that needs to be deleted or the identifier of the radio access bearer E-RAB that needs to be deleted, according to the failure report information. The E-RAB has a one-to-one correspondence with the DRB.

  In particular, when the failure report information is an identifier of the failed user equipment, the identifier of the secondary serving cell that needs to be acquired and deleted by the primary base station is the secondary serving that provides services to the failed user equipment. The identifier of the radio access bearer E-RAB that is a cell identifier and needs to be deleted is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the secondary base station and the failed user equipment . When the failure report information is an identifier of the failed user equipment and an identifier of the failed secondary serving cell, the identifier that is the secondary serving cell that needs to be acquired and deleted by the primary base station is the failed secondary serving cell. The identifier of the radio access bearer E-RAB that is the identifier of the cell and needs to be deleted is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the failed user equipment and the failed secondary serving cell It is. When the failure report information is the identifier of the failed user equipment and the identifier of the failed radio access bearer E-RAB, the identifier of the secondary serving cell that needs to be acquired and deleted by the primary base station is the failed radio The identifier of the secondary serving cell that carries the access bearer E-RAB, and the identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the failed radio access bearer E-RAB.

  At 203, the primary base station transmits a first reconfiguration message to the user equipment. The first reconfiguration message includes an identifier of a DRB that needs to be reconfigured and parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the first reconfiguration message.

  In some cases, the first reconfiguration message further needs to be deleted so that the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted. May include an identifier of a secondary serving cell.

  At 204, in some cases, the primary base station transmits a second reconfiguration message to the secondary base station. The second reconfiguration message includes an identifier of the failed user equipment. As a result, the secondary base station releases resources to service the failed user equipment according to the second reconfiguration message.

  In some cases, the second reconfiguration message further includes the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted. As a result, the secondary base station releases the secondary serving cell that needs to be deleted or the E-RAB that needs to be deleted according to the second reconfiguration message.

  In another link failure recovery method provided in this embodiment, it is not necessary to re-establish the signaling radio bearer between the user equipment and the primary base station, and it is necessary to reactivate the security between the user equipment and the primary base station. In other words, unnecessary information exchange between the user equipment and the primary base station is avoided, and the use efficiency of network resources is increased.

  One embodiment of the present invention provides yet another link failure recovery method. As shown in FIG. 3, the method includes:

  At 301, the user equipment transmits failure report information to the primary base station. The failure report information is an identifier of the failed secondary serving cell or an identifier of the failed data radio bearer DRB, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is the failed secondary serving cell and user equipment. Is carried on the radio link between. As a result, the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured.

  In some cases, the user equipment transmits failure cause information to the primary base station. The failure cause information is that the maximum number of RLC uplink retransmissions has been reached, the maximum number of random access preamble retransmissions has been reached, or the timer T310 has expired. As a result, the primary base station reconfigures parameters related to the DRB that needs to be reconfigured according to the failure cause information.

  In some cases, prior to step 301 or before the user equipment transmits the failure cause information to the primary base station, the method further includes receiving, by the user equipment, a failure detection configuration message transmitted by the primary base station. And determining a failure secondary serving cell identifier or failure DRB identifier or a specific value of the failure cause according to the failure detection configuration message by the user equipment. The message may specifically include one or more of a maximum number of RLC uplink retransmissions, a maximum number of random access preamble retransmissions, and a period of timer T310.

  In particular, when the maximum number of RLC uplink retransmissions is reached for DRB carried on the radio link between the user equipment and the secondary serving cell, the identifier of the secondary serving cell is the failed secondary serving cell. Or the user equipment determines that the DRB identifier is the fault DRB identifier. When the maximum number of random access preamble retransmissions in the secondary serving cell for the user equipment or the time period of the timer T310 has been reached, the user equipment has identified the secondary serving cell identifier as the failed secondary serving cell identifier. Or the user equipment determines that the DRB identifier carried on the radio link between the user equipment and the secondary serving cell is the fault DRB identifier.

  At 302, the user equipment receives a reconfiguration message sent by the primary base station. The reconfiguration message includes an identifier of a DRB that needs to be reconfigured and parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the reconfiguration message.

  In particular, when the failure report information is the failure secondary serving cell identifier, the DRB identifier that needs to be reconfigured is the DRB identifier carried on the radio link between the failure secondary serving cell and the user equipment. It is. When the failure report information is the failure DRB identifier, the DRB identifier that needs to be reconfigured is the failure DRB identifier.

  In some cases, the reconfiguration message may further include the identifier of the secondary serving cell that needs to be deleted.

  In particular, when the failure report information is the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that needs to be deleted is the identifier of the failed secondary serving cell. When the failure report information is an identifier of the failed data radio bearer DRB, the identifier of the secondary serving cell that needs to be deleted is the identifier of the secondary serving cell that carries the failed DRB.

  In 303, the user equipment reconfigures the DRB that needs to be reconfigured according to the reconfiguration message. In some cases, the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted.

  In yet another link failure recovery method provided in this embodiment, there is no need to re-establish a signaling radio bearer between the user equipment and the primary base station, but re-activate security between the user equipment and the primary base station. There is no need, and unnecessary information exchange between the user equipment and the primary base station is avoided, and the utilization efficiency of network resources is increased.

  One embodiment of the present invention provides yet another link failure recovery method. As shown in FIG. 4, the method includes:

  In 401, the secondary base station transmits failure report information to the primary base station. As a result, the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured. The failure report information is an identifier of the failed user device. In some cases, the failure report information may further include an identifier of the failed secondary serving cell or an identifier of the failed radio access bearer E-RAB.

  In some cases, prior to step 401, the method may further include receiving, by the secondary base station, a failure detection configuration message transmitted by the primary base station. The message specifically includes the maximum number of RLC downlink retransmissions, the maximum number of retransmissions of the PDCCH order to allocate dedicated random access resources, the maximum number of attempts to receive random access requests, and the uplink data One or more of a threshold of a block error rate (BLER, Block Error Rate) or a bit error rate (BLER, Bit Error Rate) may be included. The secondary base station determines the identifier of the failed user equipment and the identifier of the failed secondary serving cell or the identifier of the failed E-RAB according to the failure detection configuration message.

  In particular, when the maximum number of RLC downlink retransmissions for a DRB carried by a secondary base station is reached, or when the BLER or BER threshold of uplink data is reached, the identifier of the user equipment to which the DRB belongs is The secondary base station determines that it is the identifier of the failed user equipment, and the secondary base station determines that the identifier of the secondary serving cell that carries the DRB is the identifier of the failed secondary serving cell, or The secondary base station determines that the identifier of the E-RAB corresponding to the DRB is the identifier of the failed E-RAB. Maximum attempt to receive a random access request sent by the user equipment when the maximum number of retransmissions for a PDCCH order used by the secondary base station sent to the user equipment is used to allocate dedicated random access resources The secondary base station determines that the identifier of the user equipment is an identifier of the failed user equipment, and the secondary base station has transmitted the PDCCH order or received the random access request. The serving cell identifier is determined to be the failed secondary serving cell identifier, or the secondary base station supports DRB carried on the radio link between the failed user equipment and the failed secondary serving cell The identifier of the E-RAB to be Determined to be a child.

  At 402, in some cases, the secondary base station receives a reconfiguration message transmitted by the primary base station. The reconfiguration message includes an identifier of the failed user equipment.

  In some cases, the reconfiguration message may further include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In particular, when the failure report information is an identifier of a failed user equipment, the identifier of the secondary serving cell that needs to be deleted is the identifier of the secondary serving cell that provides services to the failed user equipment, and is deleted. The identifier of the radio access bearer E-RAB that needs to be performed is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the secondary base station and the failed user equipment. When the failure report information is the identifier of the failed user equipment and the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that needs to be deleted is the identifier of the failed secondary serving cell and needs to be deleted The identifier of a certain radio access bearer E-RAB is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the failed user equipment and the failed secondary serving cell. When the failure report information is the failure user equipment identifier and the failure radio access bearer E-RAB identifier, the secondary serving cell identifier that needs to be deleted carries the failure radio access bearer E-RAB. The identifier of the secondary serving cell and the identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the failed radio access bearer E-RAB.

  At 403, in some cases, the secondary base station releases resources to service the failed user equipment according to the reconfiguration message.

  In some cases, the secondary base station releases the secondary serving cell serving the failed user equipment that needs to be deleted according to the identifier of the failed user equipment and the identifier of the secondary serving cell that needs to be deleted. Alternatively, the secondary base station may release the E-RAB that needs to be deleted according to the identifier of the failed user equipment and the identifier of the radio access bearer E-RAB that needs to be deleted.

  In yet another link failure recovery method provided in this embodiment, there is no need to re-establish a signaling radio bearer between the user equipment and the primary base station, but re-activate security between the user equipment and the primary base station. There is no need, and unnecessary information exchange between the user equipment and the primary base station is avoided, and the utilization efficiency of network resources is increased.

  In one embodiment of the present invention, a link failure recovery apparatus is provided. As shown in FIG. 5, the apparatus includes a reception unit 51, an acquisition unit 52, a configuration unit 53, and a transmission unit 54.

  The receiving unit 51 may be configured to receive failure report information transmitted by the user equipment. The failure report information is an identifier of the failed secondary serving cell or an identifier of the failed data radio bearer DRB, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is the failed secondary serving cell and user equipment. Is carried on the radio link between.

  The receiving unit 51 may be further configured to receive failure cause information transmitted by the user equipment. The failure cause information is that the maximum number of RLC uplink retransmissions has been reached, the maximum number of random access preamble retransmissions has been reached, or the timer T310 has expired.

  In some cases, the transmission unit 54 may further transmit a failure detection configuration message to the user device before the reception unit 51 receives the failure report information or the failure cause information transmitted by the user device. The message may specifically include one or more of a maximum number of RLC uplink retransmissions, a maximum number of random access preamble retransmissions, and a period of timer T310. As a result, the user equipment determines the failure secondary serving cell identifier or failure DRB identifier or specific value information of the failure cause according to the failure detection configuration message.

  In particular, when the maximum number of RLC uplink retransmissions is reached for a DRB carried on the radio link between the user equipment and the secondary serving cell, the user equipment has a secondary serving cell identifier that has failed secondary -It is determined that it is the identifier of the serving cell, or the user equipment determines that the identifier of the DRB is the identifier of the failed DRB. When the maximum number of random access preamble retransmissions is reached, or when the time period of timer T310 is reached in the secondary serving cell for the user equipment, the user equipment indicates that the secondary serving cell identifier has failed secondary -It is determined that it is the identifier of the serving cell, or the user equipment determines that the identifier of the DRB carried on the radio link between the user equipment and the secondary serving cell is the identifier of the failed DRB.

  The acquisition unit 52 may be configured to acquire an identifier of a DRB that needs to be reconfigured according to the failure report information.

  In particular, when the failure report information is an identifier of the failed secondary serving cell, the identifier of the DRB that is acquired by the acquisition unit 52 and needs to be reconfigured is between the failed secondary serving cell and the user equipment. It is an identifier of DRB carried on the radio link. When the failure report information is the failure DRB identifier, the identifier of the DRB that is acquired by the acquisition unit 52 and needs to be reconfigured is the failure DRB identifier.

  The acquisition unit 52 may be further configured to acquire the identifier of the secondary serving cell that needs to be deleted or the identifier of the radio access bearer E-RAB that needs to be deleted according to the failure report information. The E-RAB has a one-to-one correspondence with the DRB.

  In particular, when the failure report information is the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that is acquired by the acquisition unit 52 and needs to be deleted is the identifier of the failed secondary serving cell. The acquired identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the failed secondary serving cell and the user equipment . When the failure report information is an identifier of the failed radio data bearer DRB, the identifier of the secondary serving cell that is acquired by the acquisition unit 52 and needs to be deleted is the secondary serving cell that carries the failed DRB. The acquired identifier of the radio access bearer E-RAB that is an identifier and needs to be deleted is the identifier of the E-RAB corresponding to the failed DRB.

  The configuration unit 53 may be configured to reconfigure parameters related to DRBs that need reconfiguration.

  The configuration unit 53 may be configured to reconfigure the maximum number of RLC uplink retransmissions for the DRB, particularly when the failure cause information is that the maximum number of RLC uplink retransmissions has been reached.

  The configuration unit 53 may be further configured to reconfigure the maximum number of preamble transmissions for the DRB, particularly when the failure cause information is that the maximum number of random access preamble retransmissions has been reached.

  The configuration unit 53 may be further configured to reconfigure the period of the timer T310 for the DRB, particularly when the failure cause information is that the timer T310 has expired.

  The sending unit 54 may be configured to send the first reconfiguration message to the user equipment. The first reconfiguration message includes the identifier of the DRB that needs to be reconfigured and the parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the first reconfiguration message.

  In some cases, the first reconfiguration message further needs to be deleted so that the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted. May include an identifier of a secondary serving cell.

  The transmission unit 54 may be further configured to transmit the second reconfiguration message to the secondary base station. The second reconfiguration message includes the user equipment identifier. As a result, the secondary base station releases resources for providing service to the user equipment according to the identifier of the user equipment.

  The second reconfiguration message further deletes, according to the second reconfiguration message, so that the secondary base station releases the secondary serving cell that needs to be deleted or the E-RAB that needs to be deleted. It may include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In the link failure recovery apparatus provided in this embodiment, unnecessary information exchange can be avoided, and the utilization efficiency of network resources can be improved.

  The entity of the link failure recovery apparatus provided in one embodiment may be a base station. As shown in FIG. 6, the base station includes a processor 61, an input device 62, an output device 63, and a memory 64. The input device 62, the output device 63, and the memory 64 are connected to the processor 61. The processor 61 includes a reception unit 6101, an acquisition unit 6102, a configuration unit 6103, and a transmission unit 6104.

  The receiving unit 6101 may be configured to receive failure report information transmitted by the user equipment. The failure report information is an identifier of the failed secondary serving cell or an identifier of the failed data radio bearer DRB, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is the failed secondary serving cell and user equipment. Is carried on the radio link between.

  The receiving unit 6101 may be further configured to receive failure cause information transmitted by the user equipment. The failure cause information is that the maximum number of RLC uplink retransmissions has been reached, the maximum number of random access preamble retransmissions has been reached, or the timer T310 has expired.

  The acquisition unit 6102 may be configured to acquire an identifier of a DRB that needs to be reconfigured according to the failure report information.

  The obtaining unit 6102 may be further configured to obtain the identifier of the secondary serving cell that needs to be deleted or the identifier of the radio access bearer E-RAB that needs to be deleted according to the failure report information. The E-RAB has a one-to-one correspondence with the DRB.

  Configuration unit 6103 may be configured to reconfigure parameters related to DRBs that need reconfiguration.

  Configuration unit 6103 may be configured to reconfigure the maximum number of RLC uplink retransmissions for the DRB, particularly when the failure cause information is that the maximum number of RLC uplink retransmissions has been reached.

  The configuration unit 6103 may be further configured to reconfigure the maximum number of preamble transmissions for the DRB, particularly when the failure cause information is that the maximum number of random access preamble retransmissions has been reached.

  The configuration unit 6103 may be further configured to reconfigure the period of the timer T310 for the DRB, particularly when the failure cause information is that the timer T310 has expired.

  The sending unit 6104 may be configured to send the first reconfiguration message to the user equipment. The first reconfiguration message includes the identifier of the DRB that needs to be reconfigured and the parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the first reconfiguration message.

  In some cases, the first reconfiguration message further needs to be deleted so that the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted. May include an identifier of a secondary serving cell.

  The transmission unit 6104 may be further configured to transmit the second reconfiguration message to the secondary base station. The second reconfiguration message includes the user equipment identifier. As a result, the secondary base station releases resources for providing service to the user equipment according to the identifier of the user equipment.

  The second reconfiguration message further deletes, according to the second reconfiguration message, so that the secondary base station releases the secondary serving cell that needs to be deleted or the E-RAB that needs to be deleted. It may include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In one embodiment of the present invention, another link failure recovery apparatus is provided. As shown in FIG. 7, the apparatus includes a reception unit 71, an acquisition unit 72, a configuration unit 73, and a transmission unit 74.

  The receiving unit 71 may be configured to receive failure report information transmitted by the secondary base station. The failure report information includes an identifier of the failed user equipment. In some cases, the failure report information further includes a failure secondary serving cell identifier or a failure radio access bearer E-RAB identifier.

  In some cases, the transmission unit 64 may transmit a failure detection configuration message to the secondary base station before the reception unit 71 receives the failure report information transmitted by the secondary base station. In particular, the message includes a maximum number of RLC downlink retransmissions, a maximum number of physical downlink control channel (PDCCH) orders to allocate dedicated random access resources, a random access request It may include one or more of a maximum number of reception attempts and a threshold of an uplink data block error rate (BLER, Block Error Rate) or bit error rate (BLER, Bit Error Rate). As a result, the secondary base station determines the identifier of the failed user equipment and the identifier of the failed secondary serving cell or the identifier of the failed E-RAB according to the failure detection configuration message.

  In particular, when the maximum number of RLC downlink retransmissions has been reached or the BLER or BER threshold of the uplink data for the DRB carried by the secondary base station is reached, the identifier of the user equipment to which the DRB belongs is out of order. The secondary base station determines that it is the identifier of the user equipment, and the secondary base station determines that the identifier of the secondary serving cell carrying the DRB is the identifier of the failed secondary serving cell, or the DRB The secondary base station determines that the identifier of the E-RAB corresponding to is the identifier of the failed E-RAB. Maximum attempt to receive a random access request sent by the user equipment when the maximum number of retransmissions for a PDCCH order used by the secondary base station sent to the user equipment is used to allocate dedicated random access resources The secondary base station determines that the identifier of the user equipment is an identifier of the failed user equipment, and the secondary base station has transmitted the PDCCH order or received the random access request. The serving cell identifier is determined to be the failed secondary serving cell identifier, or the secondary base station supports DRB carried on the radio link between the failed user equipment and the failed secondary serving cell The identifier of the E-RAB to be Determined to be a child.

  The acquisition unit 72 may be configured to acquire the identifier of the data radio bearer DRB that needs to be reconfigured according to the failure report information and reconfigure the parameters related to the DRB that needs to be reconfigured.

  In particular, when the failure report information is the identifier of the failed user equipment, the identifier of the data radio bearer DRB that is acquired by the acquisition unit 72 and needs to be reconfigured is the radio between the failed user equipment and the secondary base station. This is the identifier of the DRB carried on the link. When the failure report information is an identifier of the failed user equipment and an identifier of the failed secondary serving cell, the identifiers of the data radio bearer DRB acquired by the acquisition unit 72 and need to be reconfigured are the failed user equipment and the failure. It is the identifier of the DRB carried on the radio link between the secondary serving cells. When the failure report information is the identifier of the failed user equipment and the identifier of the failed radio access bearer E-RAB, the identifier of the data radio bearer DRB that is acquired by the acquisition unit 72 and needs to be reconfigured is the failed radio access A DRB identifier corresponding to the bearer E-RAB.

  The obtaining unit 72 may be further configured to obtain the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted according to the failure report information.

  In particular, when the failure report information is an identifier of the failed user equipment, the identifier of the secondary serving cell that needs to be acquired and deleted by the acquisition unit 72 is the secondary serving that provides services to the failed user equipment. The identifier of the radio access bearer E-RAB that is a cell identifier and needs to be deleted is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the secondary base station and the failed user equipment . When the failure report information is the identifier of the failed user equipment and the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that is acquired by the acquisition unit 72 and needs to be deleted is the failed secondary serving cell. The identifier of the radio access bearer E-RAB that is the identifier of the cell and needs to be deleted is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the failed user equipment and the failed secondary serving cell It is. When the failure report information is an identifier of the failed user equipment and an identifier of the failed radio access bearer E-RAB, the identifier of the secondary serving cell that is acquired by the acquisition unit 62 and needs to be deleted is The identifier of the secondary serving cell that carries the access bearer E-RAB, and the identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the failed radio access bearer E-RAB. The configuration unit 73 may be configured to reconfigure parameters related to DRBs that need to be reconfigured.

  The sending unit 74 may be configured to send the first reconfiguration message to the user equipment. The first reconfiguration message includes the identifier of the DRB that needs to be reconfigured and the parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the first reconfiguration message.

  In some cases, the first reconfiguration message further needs to be deleted so that the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted. May include an identifier of a secondary serving cell.

  The transmission unit 74 may be further configured to transmit the second reconfiguration message to the secondary base station. The second reconfiguration message includes an identifier of the failed user equipment. As a result, the secondary base station releases resources to service the failed user equipment according to the second reconfiguration message.

  In some cases, the second reconfiguration message further causes the secondary base station to release the secondary serving cell that needs to be deleted or the E-RAB that needs to be deleted according to the second reconfiguration message. May include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In another link failure recovery apparatus provided in this embodiment, it is possible to avoid exchange of unnecessary information and improve the utilization efficiency of network resources.

  The entity of another link failure recovery apparatus provided in one embodiment may be a base station. As shown in FIG. 8, the base station includes a processor 81, an input device 82, an output device 83, and a memory 84. The input device 82, the output device 83, and the memory 84 are connected to the processor 81.

  The processor 81 may include a reception unit 8101, an acquisition unit 8102, a configuration unit 8103, and a transmission unit 8104.

  The receiving unit 8101 may be configured to receive failure report information transmitted by the secondary base station. The failure report information includes an identifier of the failed user equipment. In some cases, the failure report information further includes a failure secondary serving cell identifier or a failure radio access bearer E-RAB identifier.

  In some cases, the transmission unit 8104 may transmit a failure detection configuration message to the secondary base station before the reception unit 8101 receives the failure report information transmitted by the secondary base station. In particular, the message includes a maximum number of RLC downlink retransmissions, a maximum number of physical downlink control channel (PDCCH) orders to allocate dedicated random access resources, a random access request It may include one or more of a maximum number of reception attempts and a threshold of an uplink data block error rate (BLER, Block Error Rate) or bit error rate (BLER, Bit Error Rate). As a result, the secondary base station determines the identifier of the failed user equipment and the identifier of the failed secondary serving cell or the identifier of the failed E-RAB according to the failure detection configuration message.

  The acquisition unit 8102 may be configured to acquire the identifier of the data radio bearer DRB that needs to be reconfigured according to the failure report information and reconfigure the parameters related to the DRB that needs to be reconfigured.

  The obtaining unit 8102 may be further configured to obtain the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted according to the failure report information. Configuration unit 8103 may be configured to reconfigure parameters related to DRBs that need reconfiguration.

  The sending unit 8104 may be configured to send the first reconfiguration message to the user equipment. The first reconfiguration message includes the identifier of the DRB that needs to be reconfigured and the parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the first reconfiguration message.

  In some cases, the first reconfiguration message further needs to be deleted so that the user equipment releases the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted. May include an identifier of a secondary serving cell.

  The transmission unit 8104 may be further configured to transmit the second reconfiguration message to the secondary base station. The second reconfiguration message includes an identifier of the failed user equipment. As a result, the secondary base station releases resources to service the failed user equipment according to the second reconfiguration message.

  In some cases, the second reconfiguration message further causes the secondary base station to release the secondary serving cell that needs to be deleted or the E-RAB that needs to be deleted according to the second reconfiguration message. May include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In one embodiment of the present invention, yet another link failure recovery apparatus is provided. As shown in FIG. 9, the apparatus includes a transmission unit 91, a reception unit 92, a configuration unit 93, and a release unit 94. The transmission unit 91 may be configured to transmit the failure report information to the primary base station.

  The failure report information is an identifier of the failed secondary serving cell or an identifier of the failed data radio bearer DRB, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is the failed secondary serving cell and user equipment. Is carried on the radio link between. As a result, the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured. The transmission unit 91 may be further configured to transmit failure cause information to the primary base station.

  The cause of the failure is that the maximum number of RLC uplink retransmissions has been reached, the maximum number of random access preamble retransmissions has been reached, or the timer T310 has expired. As a result, the primary base station reconfigures parameters related to the DRB that needs to be reconfigured according to the failure cause information.

  In some cases, the reception unit 92 may receive the failure detection configuration message transmitted by the primary base station before the transmission unit 91 transmits the failure report information or the failure cause information to the primary base station. The message may specifically include one or more of a maximum number of RLC uplink retransmissions, a maximum number of random access preamble retransmissions, and a period of timer T310. As a result, the user equipment determines the failure secondary serving cell identifier or the failure DRB identifier or the specific value of the failure cause according to the failure detection configuration message.

  In particular, when the maximum number of RLC uplink retransmissions is reached for a DRB carried on the radio link between the user equipment and the secondary serving cell, the user equipment has a secondary serving cell identifier that has failed secondary -It is determined that it is the identifier of the serving cell, or the user equipment determines that the identifier of the DRB is the identifier of the failed DRB. When the maximum number of random access preamble retransmissions in the secondary serving cell for the user equipment or the time period of the timer T310 has been reached, the user equipment has identified the secondary serving cell identifier as the failed secondary serving cell identifier. Or the user equipment determines that the DRB identifier carried on the radio link between the user equipment and the secondary serving cell is the fault DRB identifier.

  The receiving unit 92 may be configured to receive a reconfiguration message transmitted by the primary base station. The reconfiguration message includes an identifier of a DRB that needs to be reconfigured and parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the reconfiguration message.

  In particular, when the failure report information is the failure secondary serving cell identifier, the DRB identifier that needs to be reconfigured is the DRB identifier carried on the radio link between the failure secondary serving cell and the user equipment. It is. When the failure report information is the failure DRB identifier, the DRB identifier that needs to be reconfigured is the failure DRB identifier.

  The configuration unit 93 may be configured to reconfigure the fault DRB according to the reconfiguration message. In some cases, the reconfiguration message may further include the identifier of the secondary serving cell that needs to be deleted.

  In particular, when the failure report information is the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that needs to be deleted is the identifier of the failed secondary serving cell. When the failure report information is an identifier of the failed data radio bearer DRB, the identifier of the secondary serving cell that needs to be deleted is the identifier of the secondary serving cell that carries the failed DRB.

  The release unit 94 may be configured to release the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted.

  In yet another link failure recovery apparatus provided in the present embodiment, unnecessary information exchange can be avoided and network resource utilization efficiency can be improved.

  The entity of yet another link failure recovery apparatus provided in one embodiment may be a user equipment. As illustrated in FIG. 10, the user equipment includes a processor 101, an input device 102, an output device 103, and a memory 104. Input device 102, output device 103, and memory 104 are connected to central processor 101. The processor 101 may in particular comprise a transmission unit 10101, a reception unit 10102, a configuration unit 10103 and a release unit 10104.

  The transmission unit 10101 may be configured to transmit failure report information to the primary base station. The failure report information is an identifier of the failed secondary serving cell or an identifier of the failed data radio bearer DRB, the failed secondary serving cell is controlled by the secondary base station, and the failed DRB is the failed secondary serving cell and user equipment. Is carried on the radio link between. As a result, the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured.

The transmission unit 10101 may be further configured to transmit failure cause information to the primary base station. The cause of the failure is that the maximum number of RLC uplink retransmissions has been reached, the maximum number of random access preamble retransmissions has been reached, or the timer T310 has expired. As a result, the primary base station reconfigures parameters related to the DRB that needs to be reconfigured according to the failure cause information.

  In some cases, the reception unit 10102 may receive the failure detection configuration message transmitted by the primary base station before the transmission unit 10101 transmits the failure report information or the failure cause information to the primary base station. The message may specifically include one or more of a maximum number of RLC uplink retransmissions, a maximum number of random access preamble retransmissions, and a period of timer T310. As a result, the user equipment determines the failure secondary serving cell identifier or the failure DRB identifier or the specific value of the failure cause according to the failure detection configuration message.

  The receiving unit 10102 may be configured to receive a reconfiguration message transmitted by the primary base station.

  The reconfiguration message includes an identifier of a DRB that needs to be reconfigured and parameters reconfigured for the DRB. As a result, the user equipment reconfigures the DRB that needs to be reconfigured according to the reconfiguration message.

  In particular, when the failure report information is the failure secondary serving cell identifier, the DRB identifier that needs to be reconfigured is the DRB identifier carried on the radio link between the failure secondary serving cell and the user equipment. It is. When the failure report information is the failure DRB identifier, the DRB identifier that needs to be reconfigured is the failure DRB identifier.

  The configuration unit 10103 may be configured to reconfigure the fault DRB according to the reconfiguration message. In some cases, the reconfiguration message may further include the identifier of the secondary serving cell that needs to be deleted.

  In particular, when the failure report information is the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that needs to be deleted is the identifier of the failed secondary serving cell. When the failure report information is an identifier of the failed data radio bearer DRB, the identifier of the secondary serving cell that needs to be deleted is the identifier of the secondary serving cell that carries the failed DRB.

  The release unit 10104 may be configured to release the secondary serving cell that needs to be deleted according to the identifier of the secondary serving cell that needs to be deleted.

  In one embodiment of the present invention, yet another link failure recovery apparatus is provided. As shown in FIG. 11, the device may be a base station. The apparatus includes a transmission unit 111, a reception unit 112, and a release unit 113.

  The transmission unit 111 transmits the failure report information to the primary base station so that the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information and reconfigures the parameters related to the DRB that needs to be reconfigured. You may comprise as follows. The failure report information is an identifier of the failed user device. In some cases, the failure report information may further include an identifier of the failed secondary serving cell or an identifier of the failed radio access bearer E-RAB.

  In some cases, the reception unit 112 may receive the failure detection configuration message transmitted by the primary base station before the transmission unit 111 transmits the failure report information to the primary base station. The message specifically includes the maximum number of RLC downlink retransmissions, the maximum number of retransmissions of the PDCCH order to allocate dedicated random access resources, the maximum number of attempts to receive random access requests, and the uplink data One or more of a threshold of a block error rate (BLER, Block Error Rate) or a bit error rate (BLER, Bit Error Rate) may be included. The secondary base station determines the identifier of the failed user equipment and the identifier of the failed secondary serving cell or the identifier of the failed E-RAB according to the failure detection configuration message.

  In particular, when the maximum number of RLC downlink retransmissions for the DRB carried by the secondary base station is reached, or when the uplink data BLER or BER threshold is reached, the identifier of the user equipment to which the DRB belongs is out of order. The secondary base station determines that it is the identifier of the user equipment, and the secondary base station determines that the identifier of the secondary serving cell carrying the DRB is the identifier of the failed secondary serving cell, or the DRB The secondary base station determines that the identifier of the E-RAB corresponding to is the identifier of the failed E-RAB. Maximum attempt to receive a random access request sent by the user equipment when the maximum number of retransmissions for a PDCCH order used by the secondary base station sent to the user equipment is used to allocate dedicated random access resources The secondary base station determines that the identifier of the user equipment is an identifier of the failed user equipment, and the secondary base station has transmitted the PDCCH order or received the random access request. The serving cell identifier is determined to be the failed secondary serving cell identifier, or the secondary base station supports DRB carried on the radio link between the failed user equipment and the failed secondary serving cell The identifier of the E-RAB to be Determined to be a child.

  The receiving unit 112 may be configured to receive a reconfiguration message transmitted by the primary base station. The reconfiguration message includes an identifier of the failed user equipment.

  The release unit 113 may be configured to release resources to service the failed user equipment according to the reconfiguration message. In some cases, the reconfiguration message may further include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  In particular, when the failure report information is the identifier of the failed user equipment, the identifier of the secondary serving cell that needs to be deleted is the identifier of the secondary serving cell that provides services to the failed user equipment, and is deleted. The identifier of the required radio access bearer E-RAB is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the secondary base station and the failed user equipment. When the failure report information is the identifier of the failed user equipment and the identifier of the failed secondary serving cell, the identifier of the secondary serving cell that needs to be deleted is the identifier of the failed secondary serving cell and needs to be deleted The identifier of a certain radio access bearer E-RAB is the identifier of the E-RAB corresponding to the DRB carried on the radio link between the failed user equipment and the failed secondary serving cell. When the failure report information is the failure user equipment identifier and the failure radio access bearer E-RAB identifier, the secondary serving cell identifier that needs to be deleted carries the failure radio access bearer E-RAB. The identifier of the secondary serving cell and the identifier of the radio access bearer E-RAB that needs to be deleted is the identifier of the failed radio access bearer E-RAB.

  The release unit 113 is further configured to release the secondary serving cell that needs to be deleted and serves the failed user equipment according to the identifier of the failed user equipment and the identifier of the secondary serving cell that needs to be deleted. Alternatively, the release unit 113 may be further configured to release the E-RAB that needs to be deleted according to the identifier of the failed user equipment and the identifier of the radio access bearer E-RAB that needs to be deleted. .

  In yet another link failure recovery apparatus provided in the present embodiment, unnecessary information exchange can be avoided and network resource utilization efficiency can be improved.

  The entity of yet another link failure recovery apparatus provided in one embodiment may be a base station. As illustrated in FIG. 12, the base station includes a processor 121, an input device 122, an output device 123, and a memory 124. The input device 122, the output device 123, and the memory 124 are connected to the processor 121. The processor 121 may in particular comprise a transmission unit 12101, a reception unit 12102 and a release unit 12103.

  The transmission unit 12101 transmits the failure report information to the primary base station so that the primary base station acquires the identifier of the DRB that needs to be reconfigured according to the failure report information, and reconfigures the parameters related to the DRB that needs to be reconfigured You may comprise. The failure report information is an identifier of the failed user device. In some cases, the failure report information may further include an identifier of the failed secondary serving cell or an identifier of the failed radio access bearer E-RAB.

  In some cases, the reception unit 12102 may receive the failure detection configuration message transmitted by the primary base station before the transmission unit 12101 transmits the failure report information to the primary base station. The message specifically includes the maximum number of RLC downlink retransmissions, the maximum number of retransmissions of the PDCCH order to allocate dedicated random access resources, the maximum number of attempts to receive random access requests, and the uplink data One or more of a threshold of a block error rate (BLER, Block Error Rate) or a bit error rate (BLER, Bit Error Rate) may be included. The secondary base station determines the identifier of the failed user equipment and the identifier of the failed secondary serving cell or the identifier of the failed E-RAB according to the failure detection configuration message.

  The receiving unit 12102 may be configured to receive a reconfiguration message transmitted by the primary base station. The reconfiguration message includes an identifier of the failed user equipment.

  The release unit 12103 may be configured to release resources serving the failed user equipment according to the reconfiguration message. In some cases, the reconfiguration message may further include the identifier of the secondary serving cell that needs to be deleted or the identifier of the E-RAB that needs to be deleted.

  The release unit 12103 is further configured to release the secondary serving cell that needs to be deleted and serves the failed user equipment according to the identifier of the failed user equipment and the identifier of the secondary serving cell that needs to be deleted. Alternatively, the release unit 12103 may be further configured to release the E-RAB that needs to be deleted according to the identifier of the failed user equipment and the identifier of the radio access bearer E-RAB that needs to be deleted. .

  In the link failure recovery method and apparatus provided in the embodiments of the present invention, the primary base station first receives failure report information transmitted by the user equipment, and determines the DRB identifier that needs to be reconfigured according to the failure report information. Obtain and reconfigure the parameters for the DRB that need reconfiguration. Next, the primary base station transmits a first reconfiguration message to the user equipment so that the user equipment reconfigures the failed DRB according to the first reconfiguration message. Currently, when the user equipment detects that a radio link failure has occurred in the connection between the user equipment and the secondary base station, the signaling radio bearer between the user equipment and the primary base station is still re-established, Security between the primary base stations is activated again. However, it is unlikely that a radio link failure has occurred between the user equipment and the primary base station at this point. As a result, unnecessary information exchange between the user equipment and the primary base station is increased, and network resources are wasted. In the methods and apparatus provided in the embodiments of the present invention, it is not necessary to re-establish the signaling radio bearer between the user equipment and the primary base station, and it is necessary to reactivate the security between the user equipment and the primary base station. In other words, unnecessary information exchange between the user equipment and the primary base station is avoided, and the use efficiency of network resources is increased. Furthermore, the method and apparatus provided in the embodiments of the present invention enables the primary base station to more accurately identify the cause of the failure, thereby realizing link failure recovery at a lower cost.

  The link failure recovery apparatus provided in the embodiments of the present invention may implement the method embodiment provided above. Refer to the description of the method embodiments for detailed functional implementation. Details are not described here again. The link failure recovery method and apparatus provided in the embodiments of the present invention can be applied to the field of communication systems, but is not limited thereto.

  Those skilled in the art will appreciate that all or part of the process of the methods in the embodiments may be implemented by a computer program that directs the associated hardware. The program may be stored in a computer-readable storage medium. When the program is executed, the process of the method in the embodiments is performed. The storage medium may include a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM).

  The foregoing descriptions are merely specific embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention is governed by the protection scope of the claims.

51 reception unit 52 acquisition unit 53 configuration unit 54 transmission unit 62 input device 63 output device 64 memory 6101 reception unit 6102 acquisition unit 6103 configuration unit 6104 transmission unit 71 reception unit 72 acquisition unit 73 configuration unit 74 transmission unit 82 input device 83 output device 84 Memory 8101 Receiving unit 8102 Acquisition unit 8103 Configuration unit 8104 Transmission unit 91 Transmission unit 92 Reception unit 93 Configuration unit 94 Release unit 102 Input device 103 Output device 104 Memory 10101 Transmission unit 10102 Reception unit 10103 Configuration unit 10104 Release unit 111 Transmission unit 112 Reception unit 113 Release unit 122 Input device 123 Output device 124 Memo 12101 transmitter unit 12102 receive unit 12103 releasing unit

Claims (8)

When the maximum number of radio link control (RLC) uplink retransmissions is reached for a data radio bearer (DRB) carried on the radio link between the user equipment and the secondary serving cell, or a random access preamble When the maximum number of retransmissions is reached or when timer T310 expires, the DRB identifier carried by the user equipment on the radio link between the user equipment and the secondary serving cell is reconfigured. Determining the identity of a failed DRB that needs to be performed , wherein the secondary serving cell is controlled by a secondary base station ;
Transmitting failure report information to a primary base station by the user equipment, wherein the failure report information includes an identifier of the failed DRB that needs to be reconfigured;
Including link failure recovery method. Sending failure cause information to the primary base station by the user equipment so that the primary base station reconfigures the parameters of the failed DRB that need to be reconfigured according to the failure cause information; a is the root cause information, that it has reached the maximum number of R L C-uplink retransmission, or it has reached the maximum number of random access preamble retransmission, or is that the timer T310 has expired , Steps and
The link failure recovery method according to claim 1, further comprising: Before the user equipment transmits the failure cause information to the primary base station,
By the user equipment, the method comprising: receiving a fault detection configuration message sent by the primary base station, wherein the fault detection configuration message, the maximum number of R LC uplink retransmission, a random access preamble retransmission Including at least one of a maximum number of times and a period of said timer T310 ;
Determining a specific value of the failure cause information according to the failure detection configuration message by the user equipment;
The link failure recovery method according to claim 2, further comprising: Before Symbol fault DRB is conveyed by the radio link between the user equipment and the fault secondary serving cell, link failure recovery method of claim 1. When the maximum number of radio link control (RLC) uplink retransmissions is reached for a data radio bearer (DRB) carried on the radio link between the user equipment and the secondary serving cell, or a random access preamble When the maximum number of retransmissions is reached or when timer T310 expires, the DRB identifier carried on the radio link between the user equipment and the secondary serving cell needs to be reconfigured. A processor configured to determine an identifier of a faulty DRB , wherein the secondary serving cell is controlled by a secondary base station ;
A transmission unit configured to transmit failure report information to a primary base station, wherein the failure report information includes an identifier of the failed DRB that needs to be reconfigured;
Comprising user equipment. The transmitting unit is further configured to transmit failure cause information to the primary base station, wherein the primary base station reconfigures the parameters of the failed DRB that need to be reconfigured according to the failure cause information. is the root cause information, that it has reached the maximum number of R L C-uplink retransmission, or it has reached the maximum number of random access preamble retransmission, or is that the timer T310 has expired, wherein Item 6. The user equipment according to Item 5. The user equipment further comprises a receiver;
The receiver is further configured to receive a failure detection configuration message transmitted by the primary base station, wherein the failure detection configuration message includes a maximum number of RLC uplink retransmissions, a random access preamble retransmission. At least one of a maximum number of times and a period of the timer T310 ,
The processor is further configured to determine a specific value of the failure cause information according to the failure detection configuration message.
The user equipment according to claim 6. Before Symbol fault DRB is conveyed by the radio link between the fault secondary serving cell and the user equipment, the user equipment according to claim 5.

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