CN102281572B - Radio link failure notifying and information reporting method, and system and device thereof - Google Patents
Radio link failure notifying and information reporting method, and system and device thereof Download PDFInfo
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Abstract
The invention discloses a RLF (Radio Link Failure) notifying and information reporting method, and system and device thereof, which relate to the field of radio communication and are used for solving the problem of loss of RLF information recorded by a terminal in the prior art. In the method, an indication device transmits RLF record valid indication information to a target cell network to which a terminal executes cell switching, according to the information, a target cell network device learns that the terminal stores the RLF information which is not reported to a network side, and requests the terminal for reporting the RLF information. Thus, with the method, the system and the device, the RLF information recorded by the terminal before switching can be reported to the network side, and the problem of the loss of the RLF information caused by cell switching of the terminal is avoided.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method, a system, and a device for Radio Link Failure (RLF) notification and information reporting.
Background
In future mobile communication systems such as Long Term Evolution (LTE) systems, it is desirable to introduce a mechanism of Self-optimization (SON) of a network to reduce human involvement in network planning and operation maintenance, and to reduce the construction and operation costs of the network. I.e. parameters are automatically optimized by the network based on the statistics.
In the current mobile system network optimization, a drive test mode is usually adopted to check whether the coverage quality of a network and the system performance meet the expected design requirements, namely, professional network optimization personnel drive a measuring vehicle to randomly walk, and a measuring terminal records events and measurement quantities in the walking process and provides the events and the measurement quantities for operators to use for network optimization decisions. The drive tests are all completed manually, a large amount of manpower and time are required to be invested, and a large burden is brought to the network construction and maintenance cost of an operator. On the other hand, the drive test is usually only performed outdoors, but not performed indoors and in some private areas, and the network optimization in these places is difficult to be completed through the drive test.
In order to reduce the operation and maintenance costs of the network, it is desirable to adopt some methods to reduce the labor of the manual drive test. On the other hand, it is also desirable to obtain wireless measurement information of an area that cannot be reached by ordinary Drive tests, so the LTE system also introduces a Minimization Drive Test (MDT) mechanism.
Currently, the MDT mechanism includes the following optimization cases: coverage optimization (Coverage optimization), Mobility optimization (Mobility optimization), Capacity optimization (Capacity optimization), common channel parameter optimization (parameters for common channels), quality of service verification (qosvertification).
In the research report TR 36.805V9.0.0 based on MDT of version R9, completed in 3GPP 2009, the following 7 terminal (UE) measurements were determined: periodic downlink pilot measurements (periodic downlink pilot measurements), Serving Cell less than set threshold (PHR), Random access Failure (Random access Failure), Paging Channel reception Failure (Paging Channel Failure), Broadcast Channel reception Failure (Broadcast Channel Failure), and Radio link Failure report (Radio link Failure report).
The measurement quantities defined above are for the above different optimization use cases, such as Radio Link Failure (RLF) reporting may be applied for coverage optimization and mobility optimization.
In addition to the above-mentioned 7 measurement quantities, it is not excluded to add other measurement quantities, such as QoS-related measurement quantities of the UE, in the subsequent standard procedures.
Currently, the SON mechanism also adopts an RLF reporting method, and a specific process is shown in fig. 1:
the UE detects the RLF, records the identification of the cell where the UE is located when the RLF occurs, and the reference signal received power/reference signal received quality (RSRP/RSRQ) information of the cell before and after the RLF occurs. The UE then performs a cell re-establishment procedure. And if the reconstruction is successful, the UE carries the effective RLF record identifier in the reconstruction finishing message, and the network triggers the UE to report the RLF record information when the network is proper according to the effective RLF record identifier.
Since the re-establishment procedure after the RLF of the UE is not always successful, the UE enters an idle (idle) state, and then performs a Radio Resource Control (RRC) connection establishment procedure with the network, which is shown in fig. 2. Therefore, the valid information of the RLF recorded by the UE, i.e. the RLF record valid identifier, can also be put into the RRC connection setup complete message.
The same RLF reporting procedure as in SON is also in the MDT mechanism.
In the process of implementing the invention, the inventor finds that the following technical problems exist in the prior art:
as can be seen from the above description, currently, the UE carries the RLF record valid indication in the reestablishment complete message or the RRC connection establishment complete message to report to the network side, but if the network side does not request the UE to report the recorded RLF information for some reasons, and the UE performs cell handover, the target cell after handover does not know whether the UE has the recorded RLF information to report, and the UE is not triggered to report the RLF information, which may cause loss of the RLF information, so that the network side cannot perform coverage optimization and/or mobility optimization using the RLF information recorded by the UE.
Disclosure of Invention
The embodiment of the invention provides an RLF notification method and an indication device, which are used for solving the problem that a target cell of a terminal for cell switching in the prior art cannot know whether the terminal stores RLF information which is not reported to a network side.
A radio link failure, RLF, notification method, the method comprising:
the indicating equipment determines target cell network equipment for the terminal to perform cell switching;
the indicating equipment sends RLF record effective indicating information to the target cell network equipment so as to inform the target cell network equipment that the terminal stores the RLF information which is not reported to the network side.
A pointing device, characterized in that the device comprises:
a determining unit, configured to determine a target cell network device for cell switching by a terminal;
and the indicating unit is used for sending RLF record effective indicating information to the target cell network equipment so as to inform the target cell network equipment that the terminal stores the RLF information which is not reported to the network side.
In the scheme, the indicating device sends the effective RLF record indicating information to the target cell network device for the terminal to perform cell switching, so that the target cell for the terminal to perform cell switching can know whether the terminal stores the RLF information which is not reported to the network side.
The embodiment of the invention also provides a method for reporting the RLF information, a cell network device and a wireless communication system, which are used for solving the problem that the RLF information recorded by the terminal is lost in the prior art.
A Radio Link Failure (RLF) information reporting method comprises the following steps:
the target cell network equipment for the terminal to perform cell switching receives the RLF record effective indication information sent by the indication equipment and determines that the terminal stores RLF information which is not reported to the network side;
and the target cell network equipment triggers the terminal to report the RLF information to the target cell network equipment.
A cell network apparatus, the apparatus comprising:
a receiving unit, configured to receive RLF record valid indication information sent by an indication device, and determine that the terminal stores RLF information that is not reported to a network side;
and the triggering unit is used for triggering the terminal to report the RLF information to the target cell network equipment.
A wireless communication system, the system comprising:
the indicating equipment is used for determining target cell network equipment for cell switching of the terminal and sending RLF record effective indicating information to the target cell network equipment;
and the target cell network equipment is used for receiving the RLF record effective indication information, determining that the terminal stores the RLF information which is not reported to the network side, and triggering the terminal to report the RLF information to the target cell network equipment.
In the scheme, the target cell network device for the terminal to perform cell switching receives the RLF record effective indication information sent by the indication device, learns that the terminal stores the RLF information which is not reported to the network side according to the information, and requests the terminal to report the RLF information. Therefore, by adopting the invention, the RLF information recorded by the terminal before the switching can be reported to the network side, thereby avoiding the problem of RLF information loss caused by the terminal switching the cells.
Drawings
FIG. 1 is a schematic diagram of a prior art RLF recording process;
fig. 2 is a diagram illustrating RRC connection establishment in the prior art;
FIG. 3 is a schematic flow chart of a method provided by an embodiment of the present invention;
fig. 4A is a schematic diagram of an information notification according to a first embodiment of the present invention;
fig. 4B is a schematic diagram of information notification in the second embodiment of the present invention;
fig. 4C is a schematic diagram of information notification in the third embodiment of the present invention;
fig. 4D is a schematic diagram of information notification in the fourth embodiment of the present invention;
FIG. 5 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of an apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another apparatus according to an embodiment of the present invention.
Detailed Description
In order to improve the self-optimization performance of a wireless communication system, an embodiment of the present invention provides an RLF notification and information reporting method, where an indication device sends RLF record valid indication information to a target cell network device for performing cell handover on a terminal, and the target cell network device learns, according to the RLF record valid indication information, that the terminal stores RLF information that is not reported to a network side, and may request the terminal to report the RLF information, so as to perform network self-optimization using the RLF information.
Referring to fig. 3, the RLF notification and information reporting method provided in the embodiment of the present invention specifically includes the following steps:
step 30: the indicating equipment determines target cell network equipment for cell switching of the terminal, and sends RLF record effective indicating information to the target cell network equipment so as to inform the target cell network equipment that the terminal stores RLF information which is not reported to a network side;
step 31: target cell network equipment receives RLF record effective indication information sent by the indication equipment and determines that the terminal stores RLF information which is not reported to a network side;
step 32: and the target cell network equipment triggers the terminal to report the RLF information to the target cell network equipment.
As an example:
in step 30, the indication device may be the terminal, and the specific implementation of step 30 is as follows:
after the terminal determines the target cell network equipment for cell switching, the terminal initiates a switching process to the target cell network equipment according to the indication of the network side, and sends RLF record effective indication information to the target cell network equipment after the terminal is successfully switched to the target cell network equipment. Specifically, when receiving a Radio Resource Control (RRC) connection reconfiguration message sent by a network side, the terminal determines whether the terminal stores RLF information that is not reported to the network side, and when the terminal determines that the RLF information is stored in the terminal, carries RLF record valid indication information in an RRC connection reconfiguration complete message, and sends the RRC connection reconfiguration complete message to the target cell network device.
Of course, the terminal may also send the RLF record validity indication information to the target cell network device at any time after the terminal is successfully handed over to the target cell network device, and the used message for carrying the RLF record validity indication information may be any other existing message or a newly defined message.
As another example:
in step 30, the indication device may also be a source cell network device before the terminal performs cell handover, and the specific implementation of step 30 is as follows:
after judging that the terminal needs to perform cell switching, the source cell network equipment determines target cell network equipment for the terminal to perform cell switching, and sends RLF record effective indication information to the target cell network equipment. Specifically, the source cell network device determines whether RLF record valid indication information from the terminal has been received and does not request the terminal to report the recorded RLF information, and when the RLF record valid indication information from the terminal is carried in a handover preparation message, the handover preparation message is sent to the target cell network device.
Of course, the source cell network device may also send the RLF record validity indication information to the target cell network device at any time after the terminal needs to perform cell handover, for example, when the terminal is handed over to the target cell network device, and the used message for carrying the RLF record validity indication information may be any other existing message or a newly defined message.
Of course, the indicating device in the present invention is not limited to the terminal and the source cell network device, and may be any other device that can know that the terminal is handed over and the target cell network device is handed over, and has a communication interface with the target cell network device.
Preferably, in order to perform network self-optimization better, after the target cell network device triggers the terminal to report the RLF information to the target cell network device, the target cell network device may further determine other network devices that need to perform network self-optimization using the RLF information reported by the terminal, and send the RLF information reported by the terminal to the determined other network devices.
For example:
before the indication device determines the target cell network device for cell switching by the terminal in step 30, the terminal generates an RLF at the third base station and records RLF information, wherein the RLF information includes identification information of a cell where the terminal is located when the RLF occurs; the terminal establishes connection with a source cell before cell switching is carried out on the terminal through a cell rebuilding process, and recorded information of a source cell identifier is added in the recorded RLF information;
after the target cell network device triggers the terminal to report the RLF information and receives the RLF information reported by the terminal in step 32, the target cell network device reads the identification information of the cell where the terminal is located when the RLF occurs, which is included in the RLF information reported by the terminal, and the identification information of the cell (i.e., the source cell) where the terminal is successfully reestablished after the RLF occurs; and according to the read identification information, determining the network equipment of the cell in which the terminal is located when the RLF occurs and the network equipment of the cell in which the terminal is successfully reestablished after the RLF occurs as other network equipment which needs to use the RLF information reported by the terminal to perform network self-optimization, and sending the RLF information reported by the terminal to the determined other network equipment.
Another example is:
before the indication device determines the target cell network device for cell switching by the terminal in step 30, the terminal generates RLF at the third base station and records RLF information; after the terminal fails in the cell reconstruction process, establishing connection with a source cell before cell switching is performed on the terminal through an RRC connection establishment process, and adding the record information of the source cell identifier in the recorded RLF information;
after the target cell network device triggers the terminal to report the RLF information and receives the RLF information reported by the terminal in step 32, the target cell network device reads the identification information of the cell where the terminal is located when the RLF occurs, which is included in the RLF information reported by the terminal, and the identification information of the cell (namely, the source cell) where the terminal RRC connection establishment is successful after the RLF occurs; and according to the read identification information, determining the network equipment of the cell in which the terminal is located when the RLF occurs and the network equipment of the cell in which the RRC connection of the terminal is successfully established after the RLF occurs as other network equipment which needs to use the RLF information reported by the terminal to perform network self-optimization, and sending the RLF information reported by the terminal to the determined other network equipment.
Of course, other network devices that need to perform network self-optimization using the RLF information reported by the terminal may also be any other network devices, for example, devices that manage neighboring cells of the cell in which the UE is located when the RLF occurs, and the like.
Preferably, when recording the RLF information, if receiving a handover instruction from the network side, the UE may record not only the cell identifier information when the RLF occurs, but also the identifier of the target cell in the handover instruction. Therefore, after the UE performs cell handover for multiple times, when the target cell network device of the handover needs to transmit the RLF information to other network devices that need the RLF information, the RLF information can be forwarded to other network devices that need the RLF information through the recorded network devices of the historical target cell.
In the invention, the source cell network equipment before the terminal performs cell switching is positioned in a Universal Mobile Telecommunications System (UMTS) system, and the target cell network equipment for the terminal to perform cell switching is positioned in a Long Term Evolution (LTE) system; or,
the source cell network equipment before the terminal performs cell switching is positioned in an LTE system, and the target cell network equipment for the terminal to perform cell switching is positioned in a UMTS system; or,
a source cell network device before the terminal performs cell switching and a target cell network device performing cell switching are positioned in the LTE system; or,
the source cell network device before the terminal performs cell switching and the target cell network device performing cell switching are located in the UMTS system.
The cell network device in the present invention may be a base station covering a cell, or may be any other network side device having a communication interface with a terminal, such as a Radio Network Controller (RNC).
The invention is illustrated below with reference to specific examples:
the method of the invention can add RLF record effective indication information in RRC connection setup complete message and reestablishment complete message, and can also add the same RLF record effective indication information in RRC connection reconfiguration complete message, or directly transmit the indication information to the target cell through the network side in the switching process, so as to inform the target cell that the UE has available RLF information, and can obtain the RLF information.
Note that: the invention is equally applicable to UMTS networks. That is, the RLF record valid indication information may also be added to the uplink response message to the network when the UE handover is completed in the UMTS to LTE handover, UMTS to UMTS handover, or LTE to UMTS handover.
The first embodiment is as follows:
in this embodiment, the UE carries the RLF record valid indication information in the RRC connection reconfiguration complete message, taking the LTE system as an example, as shown in fig. 4A, specifically as follows:
step 1: the method comprises the steps that a UE receives an RRC connection reconfiguration message sent by an evolved universal mobile telecommunications system terrestrial radio access network (E-UTRAN) side;
step 2: the UE carries out cell switching according to the RRC connection reconfiguration message and judges that the UE stores the unreported RLF information;
and step 3: the UE carries the RLF record valid indication information in the RRC connection reconfiguration complete message, and sends the RRC connection reconfiguration complete message to the target cell network device on the UTRAN side, so as to notify the target cell network device that the UE stores the unreported RLF information, which may trigger the UE to report the RLF information.
Example two:
in this embodiment, the source cell network device transmits the RLF record valid indication information of the UE to the target cell network device, taking the signaling interaction of the LTE system handover process as an example, as shown in fig. 4B, the specific steps are as follows:
step 1: when the source cell network equipment judges that the UE needs to be switched, the source cell network equipment judges that the source cell network equipment has received the RLF record effective indication information sent by the UE and has not requested the UE to report the recorded RLF information;
step 2: the source cell network device transmits the context information of the UE stored in the source cell network device to the target cell network device switched by the UE through a switching preparation message, where the context information includes the RLF record valid indication information of the UE, so as to notify the target cell network device that the UE stores the unreported RLF information, and may trigger the UE to report the RLF information.
And then, the target cell network equipment issues a switching command, namely an RRC connection reconfiguration message, to the UE through the source network side, and the UE is further switched. After the UE is switched to the target cell, the target cell network device may trigger the UE to report the recorded RLF information.
Therefore, when the UE has indicated a valid RLF record of the network record, but the network has not yet sent the RLF record and requests the UE to report the RLF record, the source base station may notify the target base station that the UE has recorded the valid RLF through the network interface.
Example three:
in this embodiment, the UE carries the RLF record valid indication information in the RRC connection reconfiguration complete message, and the target base station transmits the RLF information to other network devices, taking an LTE system as an example, as shown in fig. 4C, specifically as follows:
step 1: the method comprises the steps that the UE generates RLF at a base station A and records RLF information, wherein the RLF information comprises cell identification of the UE when the RLF occurs;
step 2: the UE tries to carry out a cell reconstruction process, successfully reconstructs the cell (namely the reconstructed cell) of the base station B, adds the identifier of the reconstructed cell in the recorded RLF information and sends a reconstruction completion message carrying the effective indication information of the RLF record to the base station B;
and step 3: the base station B does not request the UE to report the RLF information, and the base station B indicates the UE to carry out cell switching;
and 4, step 4: after the target base station C to which the UE is successfully switched, sending an RRC connection reconfiguration completion message carrying the RLF record effective indication information to the UE;
and 5: the target base station C requests the UE to report the recorded RLF information, and determines that the RLF information needs to be sent to the base station A and the base station B according to the identification of a reconstructed cell in the RLF information reported by the UE and the identification of a cell where the UE is located when the RLF occurs;
step 6: and the target base station C sends the RLF information to the base station A and the base station B so that the base station A and the base station B can carry out network self-optimization according to the RLF information.
Example four:
in this embodiment, the source cell network device transmits the RLF record valid indication information of the UE to the target cell network device, and the target base station transmits the RLF information to other network devices, taking an LTE system as an example, as shown in fig. 4D, the details are as follows:
step 1: the method comprises the steps that the UE generates RLF at a base station A and records RLF information, wherein the RLF information comprises cell identification of the UE when the RLF occurs;
step 2: the UE tries to carry out a cell reconstruction process, successfully reconstructs the cell (namely the reconstructed cell) of the base station B, adds the identifier of the reconstructed cell in the recorded RLF information and sends a reconstruction completion message carrying the effective indication information of the RLF record to the base station B;
and step 3: the base station B does not request the UE to report the RLF information, the base station B indicates the UE to carry out cell switching, and the switching preparation message sent to the target base station C carries effective indication information of the RLF record;
and 4, step 4: after the UE is successfully switched to the target base station C, the target base station C requests the UE to report the recorded RLF information, and the RLF information is determined to be required to be sent to the base station A and the base station B according to the identifier of a reestablishing cell in the RLF information reported by the UE and the identifier of a cell where the UE is located when the RLF occurs;
and 5: and the target base station C sends the RLF information to the base station A and the base station B so that the base station A and the base station B can carry out network self-optimization according to the RLF information.
Referring to fig. 5, an embodiment of the present invention further provides a wireless communication system, where the system includes:
an indication device 50, configured to determine a target cell network device for performing cell handover by the terminal, and send RLF record valid indication information to the target cell network device;
and the target cell network device 51 is configured to receive the RLF record valid indication information, determine that the terminal stores RLF information that is not reported to the network side, and trigger the terminal to report the RLF information to the target cell network device.
The indication device 50 is the terminal, and the indication device 50 is configured to:
determining target cell network equipment for cell switching by a terminal, initiating a switching process to the target cell network equipment according to the indication of a network side, and sending RLF record effective indication information to the target cell network equipment after the target cell network equipment is successfully switched.
The indicating device 50 is a source cell network device before the terminal performs cell handover, and the indicating device 50 is configured to:
and after judging that the terminal needs to perform cell switching, determining target cell network equipment for the terminal to perform cell switching, and sending RLF record effective indication information to the target cell network equipment.
Referring to fig. 6, an embodiment of the present invention further provides a pointing device, which may be applied in the foregoing wireless communication system, where the pointing device includes:
a determining unit 60, configured to determine a target cell network device for cell switching by a terminal;
an indicating unit 61, configured to send RLF record validity indication information to the target cell network device, so as to notify the target cell network device that the terminal stores RLF information that is not reported to the network side.
The indicating device is the terminal, and the indicating unit 61 is configured to:
and after the terminal initiates a switching process to the target cell network equipment according to the indication of the network side and successfully switches to the target cell network equipment, sending RLF record effective indication information to the target cell network equipment.
The indication unit 61 is configured to:
receiving a Radio Resource Control (RRC) connection reconfiguration message sent by a network side;
judging whether the terminal stores RLF information which is not reported to a network side;
and if so, carrying the RLF record effective indication information in the RRC connection reconfiguration complete message, and sending the RRC connection reconfiguration complete message to the target cell network equipment.
The indicating device is a source cell network device before the terminal performs cell handover, and the determining unit 60 is configured to:
and after judging that the terminal needs to perform cell switching, determining target cell network equipment for the terminal to perform cell switching.
The indication unit 61 is configured to:
judging whether RLF record effective indication information from the terminal is received and the terminal is not requested to report the recorded RLF information;
and if so, carrying the RLF record effective indication information from the terminal in a handover preparation message, and sending the handover preparation message to the target cell network equipment.
The apparatus further comprises:
a first recording unit 62 for generating RLF at the third base station and recording RLF information; and establishing connection with a source cell before cell switching is carried out on the terminal through a cell rebuilding process, and adding the record information of the source region identifier in the recorded RLF information.
The apparatus further comprises:
a second recording unit 63 for generating RLF at the third base station and recording RLF information; after the cell reestablishment process fails, establishing connection with the source cell before cell switching is performed by the terminal through the RRC connection establishment process, and adding the recorded information of the source cell identifier in the recorded RLF information.
Referring to fig. 7, an embodiment of the present invention further provides a cell network device, which may be applied in the foregoing wireless communication system, and the device includes:
a receiving unit 70, configured to receive RLF record valid indication information sent by the indication device, and determine that the terminal stores RLF information that is not reported to the network side;
and the triggering unit 71 is configured to trigger the terminal to report the RLF information to the target cell network device.
The indicating device is the terminal, and the receiving unit 70 is configured to:
and after the terminal is successfully switched to the target cell network equipment, receiving the RLF record effective indication information sent by the terminal.
And the RLF record effective indication information is carried in a Radio Resource Control (RRC) connection reconfiguration message sent by the terminal.
The indicating device is a source cell network device before the terminal performs cell handover, and the receiving unit 70 is configured to:
and after the source cell network equipment judges that the terminal needs to perform cell switching, receiving the effective indication information of the RLF record sent by the source cell network equipment.
The RLF record validity indication information is carried in a handover preparation message sent by the source cell network equipment.
The apparatus further comprises:
a transmission unit 72, configured to determine, after the terminal is triggered to report the RLF information to the target cell network device, other network devices that need to use the RLF information reported by the terminal, and send the RLF information reported by the terminal to the determined other network devices.
The transmission unit 72 is configured to:
reading the identification information of the cell where the terminal is located when the RLF occurs, and the cell identification information of the cell where the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs, which are contained in the RLF information reported by the terminal;
and according to the read identification information, determining the network equipment of the cell in which the terminal is located when the RLF occurs and the network equipment of the cell in which the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs as other network equipment needing to use the RLF information reported by the terminal, wherein the cell in which the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs is the source cell of the terminal before cell switching.
In conclusion, the beneficial effects of the invention include:
in the solution provided in the embodiment of the present invention, the indicating device sends RLF record valid indicating information to the target cell network device for performing cell handover to the terminal, and the target cell network device learns that the terminal stores RLF information that is not reported to the network side according to the RLF record valid indicating information, and requests the terminal to report the RLF information, so as to perform network self-optimization by using the RLF information. Therefore, by adopting the scheme, the RLF information recorded by the terminal before switching can be reported to the network side, so that the RLF information loss caused by the cell switching of the terminal is avoided, the problem that the network side can not utilize the RLF information to perform coverage optimization and/or mobility optimization is solved, and the network self-optimization performance is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A radio link failure, RLF, notification method, comprising:
the terminal generates RLF at a third base station and records RLF information;
the terminal establishes connection with a source cell before cell switching is carried out on the terminal through a cell rebuilding process, and a source cell identifier is added in the recorded RLF information, or after the cell rebuilding process of the terminal fails, the terminal establishes connection with the source cell before cell switching is carried out on the terminal through an RRC connection establishing process, and the source cell identifier is added in the recorded RLF information;
the indicating equipment determines target cell network equipment for the terminal to perform cell switching;
the indication equipment sends RLF record effective indication information to the target cell network equipment so as to inform the target cell network equipment that the terminal stores RLF information which is not reported to the network side;
wherein, the indicating device is the terminal, and the sending, by the indicating device, the RLF record validity indication information to the target cell network device includes: the terminal initiates a switching process to the target cell network equipment according to the indication of the network side, and sends RLF record effective indication information to the target cell network equipment after the terminal is successfully switched to the target cell network equipment;
or, the indicating device is a source cell network device before the terminal performs cell handover, and the determining, by the indicating device, a target cell network device for the terminal to perform cell handover includes: after judging that the terminal needs to perform cell switching, the source cell network equipment determines target cell network equipment for the terminal to perform cell switching; the sending of the RLF record validity indication information to the target cell network device includes: the source cell network equipment judges whether RLF record effective indication information from the terminal is received or not and does not request the terminal to report the recorded RLF information; and when the source cell network equipment judges that the RLF record is valid, the RLF record valid indication information from the terminal is carried in a handover preparation message, and the handover preparation message is sent to target cell network equipment.
2. The method of claim 1, wherein sending RLF record validity indication information to the target cell network device after successful handover to the target cell network device comprises:
the terminal receives a Radio Resource Control (RRC) connection reconfiguration message sent by a network side;
the terminal judges whether the terminal stores RLF information which is not reported to a network side;
and when the terminal judges that the received Radio Link Failure (RLF) record is valid, carrying the RLF record valid indication information in an RRC connection reconfiguration finishing message, and sending the RRC connection reconfiguration finishing message to the target cell network equipment.
3. The method according to any of claims 1-2, characterized in that the source cell network device before the terminal performs the cell handover is located in a universal mobile telecommunications system, UMTS, system, and the target cell network device for the terminal to perform the cell handover is located in a long term evolution, LTE, system; or,
the source cell network equipment before the terminal performs cell switching is positioned in an LTE system, and the target cell network equipment for the terminal to perform cell switching is positioned in a UMTS system; or,
a source cell network device before the terminal performs cell switching and a target cell network device performing cell switching are positioned in the LTE system; or,
the source cell network device before the terminal performs cell switching and the target cell network device performing cell switching are located in the UMTS system.
4. A Radio Link Failure (RLF) information reporting method is characterized by comprising the following steps:
the target cell network equipment for the terminal to perform cell switching receives the RLF record effective indication information sent by the indication equipment and determines that the terminal stores RLF information which is not reported to the network side;
the target cell network equipment triggers the terminal to report the RLF information to the target cell network equipment;
the target cell network equipment determines other network equipment which needs to use the RLF information reported by the terminal, and sends the RLF information reported by the terminal to the determined other network equipment;
wherein, the indicating device is the terminal, and the receiving, by the target cell network device, the RLF record validity indication information sent by the indicating device includes: after the terminal is successfully switched to the target cell network equipment, the target cell network equipment receives RLF record effective indication information sent by the terminal;
or, the indicating device is a source cell network device before the terminal performs cell handover, and the receiving, by the target cell network device, the RLF record valid indication information sent by the indicating device includes: after the target cell network equipment judges that the terminal needs to perform cell switching, the target cell network equipment receives RLF record effective indication information sent by the source cell network equipment; the RLF record effective indication information is carried in a handover preparation message sent by the source cell network equipment;
the target cell network equipment determining other network equipment needing to use the RLF information reported by the terminal comprises the following steps: the target cell network equipment reads the identification information of the cell where the terminal is located when the RLF occurs and the cell identification information of the successful terminal reconstruction or the successful RRC connection establishment after the RLF occurs, wherein the identification information is contained in the RLF information reported by the terminal; and the network equipment of the cell in which the terminal is located when the RLF occurs and the network equipment of the cell in which the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs are determined as other network equipment needing to use the RLF information reported by the terminal by the target cell network equipment according to the read identification information, and the cell in which the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs is the source cell of the terminal before cell switching.
5. The method of claim 4, wherein when the indication device is the terminal, the RLF record valid indication information is carried in a Radio Resource Control (RRC) connection reconfiguration complete message sent by the terminal.
6. A pointing device, characterized in that the device comprises:
a determining unit, configured to determine a target cell network device for cell switching by a terminal;
an indication unit, configured to send RLF record valid indication information to target cell network equipment, so as to notify that RLF information that is not reported to a network side is stored in a terminal of the target cell network equipment;
wherein, the indicating device is the terminal, and the indicating unit is configured to: after the terminal initiates a switching process to the target cell network equipment according to the indication of the network side and successfully switches to the target cell network equipment, the terminal sends RLF record effective indication information to the target cell network equipment;
or, the indicating device is a source cell network device before the terminal performs cell handover, and the determining unit is configured to: after judging that the terminal needs to perform cell switching, determining target cell network equipment for the terminal to perform cell switching; the pointing device is configured to: judging whether RLF record effective indication information from the terminal is received and the terminal is not requested to report the recorded RLF information; if so, carrying the RLF record effective indication information from the terminal in a handover preparation message, and sending the handover preparation message to target cell network equipment;
a first recording unit for generating RLF at the third base station and recording RLF information; establishing connection with a source cell before cell switching is carried out on a terminal through a cell rebuilding process, and adding a source cell identifier in the recorded RLF information;
a second recording unit for generating RLF at the third base station and recording RLF information; after the cell reestablishment process fails, establishing connection with the source cell before cell switching is performed on the terminal through the RRC connection establishment process, and adding the source cell identifier in the recorded RLF information.
7. The device of claim 6, wherein when the pointing device is the terminal, the pointing unit is configured to:
receiving a Radio Resource Control (RRC) connection reconfiguration message sent by a network side;
judging whether the terminal stores RLF information which is not reported to a network side;
and if so, carrying the RLF record effective indication information in the RRC connection reconfiguration complete message, and sending the RRC connection reconfiguration complete message to the target cell network equipment.
8. A cell network apparatus, characterized in that the apparatus comprises:
a receiving unit, configured to receive RLF record valid indication information sent by an indication device, and determine that the terminal stores RLF information that is not reported to a network side;
the triggering unit is used for triggering the terminal to report the RLF information to the target cell network equipment;
wherein, the indication device is the terminal, and the receiving unit is configured to: after the terminal is successfully switched to the target cell network equipment, receiving RLF record effective indication information sent by the terminal;
or, the indicating device is a source cell network device before the terminal performs cell handover, and the receiving unit is configured to: after the source cell network equipment judges that a terminal needs to perform cell switching, receiving RLF record effective indication information sent by the source cell network equipment; the RLF record effective indication information is carried in a handover preparation message sent by the source cell network equipment;
a transmission unit, configured to determine, after the terminal is triggered to report the RLF information to the target cell network device, other network devices that need to use the RLF information reported by the terminal, and send the RLF information reported by the terminal to the determined other network devices;
the transmission unit is used for: reading the identification information of the cell where the terminal is located when the RLF occurs, and the cell identification information of the cell where the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs, which are contained in the RLF information reported by the terminal; and according to the read identification information, determining the network equipment of the cell in which the terminal is located when the RLF occurs and the network equipment of the cell in which the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs as other network equipment needing to use the RLF information reported by the terminal, wherein the cell in which the terminal is successfully reestablished or the RRC connection is successfully established after the RLF occurs is the source cell of the terminal before cell switching.
9. The apparatus of claim 8, wherein the RLF record valid indication information is carried in a radio resource control, RRC, connection reconfiguration complete message sent by the terminal when the indication apparatus is the terminal.
10. A wireless communication system, comprising: a pointing device as claimed in claim 6 or 7 and a cell network device as claimed in claim 8 or 9.
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| EP3026949A4 (en) * | 2013-07-25 | 2017-01-04 | Fujitsu Limited | Information processing method and device thereof and communication system |
| WO2015017975A1 (en) * | 2013-08-06 | 2015-02-12 | 华为技术有限公司 | Indication information sending and receiving method and apparatus |
| CN110022620A (en) * | 2018-01-08 | 2019-07-16 | 维沃移动通信有限公司 | A kind of processing method of Radio Link Failure, user terminal and network side equipment |
| CN111480389B (en) * | 2018-03-22 | 2021-11-19 | Oppo广东移动通信有限公司 | Information transmission method and device and computer storage medium |
| CN112399454B (en) * | 2019-08-14 | 2022-12-13 | 大唐移动通信设备有限公司 | Information transmission method and device |
| CN111836317B (en) * | 2019-08-14 | 2022-10-18 | 维沃移动通信有限公司 | Reporting method of state information, terminal and network equipment |
| CN112399494B (en) * | 2019-08-15 | 2022-05-24 | 华为技术有限公司 | Wireless communication method and communication device |
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