JP2016059073A - Method and apparatus for analyzing cause of link failure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method, a base station, and a user device for analyzing cause of link failure.SOLUTION: A method for analyzing cause of link failure, includes the steps of: receiving, by a base station where a user device is present when link failure is observed by the user device, identification information transmitted by other base stations or the user device, the identification information including identification related to the user device and/or identification of the user device in the base station; and determining, by the base station when it determines that the identification information is stored in the base station, that the link failure is caused by handover preparation failure. With the method, the link failure caused by the handover preparation failure may be analyzed, thereby enabling a network side to optimize a network more accurately. As a result, a problem exiting in a conventional technique can be solved.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the field of communications, and more particularly, to a method and apparatus for analyzing a cause of link failure.

  In self-optimizing networks (SON, Self-optimizing Networks), a terminal device can send a link failure report to the network side after a link failure occurs, and then the network side The cause of failure can be determined.

  In the process of realizing the present invention, the inventor determines whether the shortcoming of the prior art is due to the wrong installation problem of the handover parameter or the coverage problem based on the link failure information provided by the terminal. However, it has been found that the conventional determination method cannot determine whether or not the handover preparation failure has occurred, and thus the network side cannot accurately perform optimization.

  An object of an embodiment of the present invention is to provide a method of analyzing a cause of link failure, a base station, and a user equipment, which can analyze link failure due to handover preparation failure, Thereby, the network side can optimize a network more correctly.

According to one aspect of an embodiment of the present invention, a method for analyzing a cause of link failure is provided, the method comprising:
The base station located when the user equipment observes the link failure receives the sign (ID) information transmitted by another base station or the user equipment, and the sign information includes a sign related to the user equipment and / or The user equipment is an indicator at the base station; and
When the base station determines that the beacon information is stored in the base station, the base station determines that the link failure is due to a handover preparation failure.

According to another aspect of an embodiment of the present invention, a method for analyzing a cause of link failure is provided, the method comprising:
After the base station has successfully established a connection with the user equipment, the base station receives the sign information transmitted by the user equipment, the sign information includes the sign about the user equipment and / or the user equipment A sign at the base station where it was observed; and
Transmitting the indicator information to a base station located when the user apparatus observes a link failure.

According to another aspect of an embodiment of the present invention, a method for analyzing a cause of link failure is provided, the method comprising:
When the user equipment attempts to re-establish a connection when a link failure occurs;
After the user equipment has successfully established a connection with the base station, the user equipment transmits the indicator information to the base station, wherein the indicator information includes an indicator for the user device and / or It includes a sign at the base station where the user apparatus is located when observing a link failure.

According to another aspect of an embodiment of the present invention, a base station is provided, which is a base station that is located when the user equipment observes a link failure,
A first receiving unit for receiving beacon information transmitted by another base station or the user equipment, the beacon information being located when the beacon about the user equipment and / or the user equipment observes a link failure A first receiving unit that is an indicator in the base station to perform; and
When the base station determines that the beacon information is stored in the base station, the base station includes a first processing unit that determines that the link failure is due to a handover preparation failure.

According to another aspect of an embodiment of the present invention, a base station is provided, the base station comprising:
A third receiving unit for receiving sign information transmitted by the user equipment after the base station has successfully established a connection with the user equipment, wherein the sign information comprises a sign for the user equipment and / or A third receiving unit, which is an indication at the base station where the user equipment observes the link failure; and
A third transmission unit is included that transmits the beacon information to a base station located when the user apparatus observes a link failure.

According to another aspect of an embodiment of the present invention, a user equipment is provided, the user equipment comprising:
A sixth processing unit that generates indicator information about the user equipment when the user equipment attempts to re-establish a connection when a link failure occurs; and
A fourth transmission unit for transmitting the beacon information to the base station after successfully establishing a connection with the base station, the beacon information being indicative of the beacon relating to the user equipment and / or the user having failed in the equipment link 4th transmission unit which is a mark in the base station located when observing is included.

According to another aspect of an embodiment of the present invention, a method for analyzing a cause of link failure is provided, the method comprising:
When the user equipment is about to hand over, the base station where the user equipment is located sends a handover request message to all possible target base stations;
Receiving a handover preparation failure message returned by the target base station based on the handover request message; and
Sending an indication of handover preparation failure to the user equipment.

According to another aspect of an embodiment of the present invention, a method for analyzing a cause of link failure is provided, the method comprising:
The user equipment receives an indication of handover preparation failure transmitted by the base station in which the user equipment is located; and
After the link failure of the user equipment, the user equipment transmits an indication of the handover preparation failure to the base station or another base station after establishing a connection with the base station or other base station. .

According to another aspect of an embodiment of the present invention, a method for analyzing a cause of link failure is provided, the method comprising:
Receiving a handover preparation failure indication transmitted by the user equipment after the base station has successfully established a connection with the user equipment; and
This includes not transmitting or transmitting the handover preparation failure indication to the base station where the user equipment observes the link failure.

According to another aspect of an embodiment of the present invention, a base station is provided, the base station comprising:
A fifth transmission unit for transmitting a handover request message to all possible target base stations when the user equipment is to be handed over;
A fourth receiving unit for receiving a handover preparation failure message returned by the target base station based on the handover request message; and
A seventh processing unit for transmitting an instruction of handover preparation failure to the user apparatus;

According to another aspect of an embodiment of the present invention, a user equipment is provided, the user equipment comprising:
A sixth receiving unit for receiving a handover preparation failure instruction transmitted by a base station in which the user apparatus is located; and
An eighth processing unit that transmits an indication of the handover preparation failure to the base station or another base station after the link fails and the user equipment establishes a connection with the base station or another base station;

According to another aspect of an embodiment of the present invention, a base station is provided, the base station comprising:
A seventh receiving unit for receiving a handover preparation failure instruction transmitted by the user equipment after the base station has successfully established a connection with the user equipment; and
A ninth processing unit that does not transmit or transmits the handover preparation failure indication to the base station located when the user equipment observes the link failure;

  According to another aspect of an embodiment of the present invention, a computer readable program is provided, of which when executing the program at a base station, the program causes the link failure cause as described above at the base station. Let's execute the method of analyzing.

  According to another aspect of an embodiment of the present invention, a storage medium storing a computer readable program is provided, wherein the computer readable program analyzes a cause of link failure as described above in a base station. Is executed.

  According to another aspect of an embodiment of the present invention, a computer readable program is provided, of which when executing the program on a user device, the program causes the link failure cause as described above in the user device. Let's execute the method of analyzing.

  According to another aspect of an embodiment of the present invention, a storage medium storing a computer readable program is provided, wherein the computer readable program analyzes the cause of link failure as described above in a user device. Is executed.

  The beneficial effect of the embodiment of the present invention is that it can analyze the link failure due to the handover preparation failure, so that the network side can optimize the network more accurately and solve the problems existing in the prior art. Can be solved.

  Based on the following description and drawings, specific embodiments of the present invention will be disclosed in detail to clarify the manner in which the principles of the present invention can be employed. In addition, embodiment of this invention is not limited by it on the range. Within the spirit and scope of the appended claims, the embodiments of the present invention include all variations, modifications, and alternatives.

  Features described and / or illustrated for one embodiment may be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or other embodiments. The features in can be replaced.

  It should be noted that terms such as “inclusive / include”, as used herein, refer to the presence of a feature, the entire device, step or assembly, but the presence of one or more other features, the entire device, step or assembly. Or it does not exclude addition.

The foregoing and other features and advantages of embodiments of the present invention may be better understood with reference to the following drawings.
It is a figure which shows the link failure cause analysis method in Example 1 of this invention. It is a figure which shows the link failure cause analysis method in Example 2 of this invention. It is a figure which shows the link failure cause analysis method in Example 3 of this invention. It is a figure which shows the link failure cause analysis method in Example 4 of this invention. It is a figure which shows the link failure cause analysis method in Example 5 of this invention. It is a figure which shows the link failure cause analysis method in Example 6 of this invention. 10 is a flowchart of a process in which a user apparatus in Embodiment 4 of the present invention attempts to reestablish a connection with an adjacent base station. It is a flowchart of the process in which the user apparatus in Example 4 of this invention establishes a RRC connection with a base station. FIG. 10 is a configuration diagram of a base station in Embodiment 7 of the present invention. FIG. 10 is a configuration diagram of a base station in Example 8 of the present invention. FIG. 10 is a configuration diagram of a base station in Embodiment 9 of the present invention. FIG. 10 is a configuration diagram of a user apparatus in Embodiment 10 of the present invention. It is a figure which shows the link failure cause analysis method in Example 11 of this invention. It is a figure which shows the link failure cause analysis method in Example 12 of this invention. It is a figure which shows the link failure cause analysis method in Example 13 of this invention. It is a figure which shows the link failure cause analysis method in Example 14 of this invention. It is a figure which shows the link failure cause analysis method in Example 15 of this invention. It is a figure which shows the link failure cause analysis method in Example 16 of this invention. FIG. 17 is a configuration diagram of a base station in Embodiment 17 of the present invention. It is a block diagram of the user apparatus in Example 18 of this invention. FIG. 20 is a configuration diagram of a base station in Embodiment 19 of the present invention.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. These embodiments are illustrative only and do not limit the invention. In order that those skilled in the art can easily understand the principles and embodiments of the present invention, the embodiments of the present invention will be described by taking the analysis of the cause of link failure in the SON network as an example. The present invention is not limited to the system described above, and can be applied to other systems related to the analysis of the cause of link failure.

  Currently, according to the conventional scheme, after a link failure occurs, the user equipment can determine whether the network side is based on the link failure information provided by the terminal or not due to an incorrect installation of a handover parameter or a coverage problem. . However, in the conventional scheme, it cannot be determined that the link failure is due to a handover preparation failure, which causes incorrect network-side optimization. Therefore, in the embodiment of the present invention, information related to the network side is provided, whereby the network side can identify the link failure due to the handover preparation failure, and improve the effect of optimizing the network performance. Can do.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a method of analyzing a cause of link failure in Embodiment 1 of the present invention, which is a base station that is located when a user device UE observes a link failure (the base station has a link of the user device). If the user equipment is again successfully connected to the base station after a link failure, the base station It is also a base station that establishes a connection with the user equipment successfully.

  As shown in FIG. 1, the method includes the following steps.

  Step 101: A base station located when the user apparatus UE observes a link failure receives sign information transmitted by another base station or the user apparatus, the sign information includes a sign related to the user apparatus, and / or , A sign at the base station of the user equipment.

  In this embodiment, the marker information is information used when the user apparatus attempts to reestablish a connection after a link failure.

  Among them, after the link failure, the user apparatus successfully establishes a connection with the base station again, and then the base station receives the marker information transmitted by the user apparatus. In addition, after the link has failed and the user apparatus has successfully established a connection with another base station, the other base station acquires the indicator information from the user apparatus.

  Among them, the indicator for the user device is a unique indicator list for one user device, for example, the shortMAC-I list, and refers to 3GPP TS36.331.

  In addition, the indicator in the base station of the user apparatus may be a cell radio network temporary indicator (C-RNTI).

  In this embodiment, the beacon information may be transmitted directly from the other base station or the user apparatus to the base station. In this embodiment, the beacon information is included in any one message in the base station. May be sent to.

  For example, the indicator information may be included in a link failure instruction message and transmitted to the base station.

  Another base station or the user apparatus may include the indicator information in a link failure report (RLF Report), and include the link failure report in a link failure instruction message and transmit the link failure report to the base station. In such a case, the link failure report may include other information in addition to the above-described indicator information, for example, measurement information related to the own cell and neighboring cells at the time of link failure, user device location information, speed information, and the like. Since it is often similar to the information contained in the prior art, detailed description is omitted here.

  Step 102: When the base station located when the user apparatus observes the link failure determines that the indicator information is stored in the base station, the base station determines that the link failure is due to a handover preparation failure. It is determined that

  In this embodiment, the base station receives the indicator information or receives a link failure report, and after obtaining the indicator information, searches the information list stored locally in advance. This can be done to determine whether the indicator information is present in the information list, and if so, consider the link failure as a result of handover preparation failure.

  As can be seen from the above-described embodiment, the base station located when the user apparatus observes the link failure uses the received beacon information and the pre-stored local information so that the link failure is a handover parameter installation problem or It can be determined that it is due to a handover preparation failure rather than a coverage issue, etc., so that the base station can ignore the link failure message and optimize the network more accurately Can help.

  FIG. 2 shows a method for analyzing the cause of link failure in Embodiment 2 of the present invention, which relates to a base station that has successfully established a connection with the user device after the link failure of the user device UE has occurred. The base station is not a base station that is located when the user apparatus observes a link failure, but is an adjacent base station or a non-adjacent base station that is located when the user apparatus observes a link failure. There may be.

  As shown in FIG. 2, the method includes the following steps.

  Step 201: The base station receives beacon information transmitted by the user apparatus after successfully establishing a connection with the user apparatus, and the beacon information includes the beacon relating to the user apparatus and / or the user apparatus. It is a sign at the base station where the link failure is observed.

  In the present embodiment, the indicator information is information used when the user apparatus attempts to reestablish a connection after a link failure. Of these, the user apparatus attempts to reestablish a connection with a base station after a link failure. The base station that performs the connection re-establishment with the user apparatus is an arbitrary base station, for example, a base station that is located when the user apparatus observes a link failure, and a base station that is located when the user apparatus observes a link failure. It may be a base station that is adjacent to the base station to be operated or another base station that is not adjacent to the base station.

  The method by which the user apparatus transmits the marker information is as described in the first embodiment, and thus detailed description thereof is omitted here.

  Step 202: The base station transmits the indicator information to a base station located when the user apparatus observes link failure.

  In this embodiment, the base station may transmit the indicator information directly to the base station where the user equipment observes the link failure, or include the indicator information in a link failure report, and When the user apparatus observes the link failure, it may be transmitted to the base station where it is located. Specifically, since it is as described in the first embodiment, detailed description is omitted here.

  In this embodiment, when the indicator information is included in the link failure report and transmitted, the link failure report is transmitted to the base station located when the user apparatus observes the link failure by a link failure indication (RLF Indication) message. May be.

  In this way, the base station located when the user apparatus observes the link failure determines whether the link failure is due to the handover preparation failure based on the acquired tag information and the prestored local information. Specifically, since it is as described in the first embodiment, detailed description is omitted here.

  FIG. 3 shows a method of analyzing a cause of link failure in Embodiment 3 of the present invention, which relates to the user apparatus UE, and the user apparatus UE connects to an arbitrary base station after the link failure occurs. Any re-establishment attempt or connection can be established, such as any base station, e.g., the base station where the user equipment is located, when the user equipment observes link failure, the user equipment observes link failure It may be a base station that is adjacent to a base station that is sometimes located or another base station that is not adjacent.

  As shown in FIG. 3, the method includes the following steps.

  Step 301: The user equipment generates sign information relating to the user equipment when attempting to reestablish the connection after the link failure occurs.

In the present embodiment, the base station that performs re-establishment with the user apparatus may be an arbitrary base station, and as described above, detailed description thereof is omitted here;
In this example, the base station where the user equipment is located cannot select an appropriate target base station even after issuing a handover request to all possible target base stations of the user equipment, A handover command cannot be transmitted to the user apparatus. At this time, the user apparatus UE may perform cell selection, and then perform an attempt to re-establish a connection with the selected base station and perform the re-establishment. In the process of this step, the tag information about the user equipment is generated, and the information included in the tag information includes, for example, shortMAC_I and / or C-RNTI, as described in the first and second embodiments. The short MAC-I is different for different user equipments, and the short MAC-I is different for different target cells for the same user equipment.

  The target base station is a base station that is adjacent to the base station where the user apparatus observes link failure.

  Among them, the user apparatus UE re-establishes a radio resource control (RRC, Radio Resource Control) connection with the base station, the specific process is similar to the prior art, and will be described in the following embodiment, Detailed description is omitted here.

  Step 302: The user equipment transmits the indicator information to the base station after successfully establishing a connection with the base station.

  In this embodiment, the user equipment may perform cell selection after a certain period of time after a re-establishment attempt has failed, and establish a connection successfully with the selected one base station. A base station that has successfully established a connection with a user apparatus is an arbitrary base station, for example, a base station that is located when the user apparatus observes a link failure, or a base station that is located when the user apparatus observes a link failure One base station adjacent to the base station or a non-adjacent base station may be used.

  In the present embodiment, the method of transmitting the marker information by the user apparatus is as described in the first and second embodiments, that is, the marker information may be transmitted directly to the base station by an arbitrary message. The indicator information may be included in the link failure instruction message and transmitted to the base station, or the link failure report including the indicator information may be included in the instruction message and transmitted to the base station.

  As can be seen from the above-described embodiment, the user equipment transmits a beacon information to the base station after successfully establishing a connection with a certain base station, of which the user equipment is re-established. Information used when an attempt is made. In this way, after receiving the beacon information, the base station may transmit the beacon information to the base station located when the user apparatus observes a link failure. In this way, the base station that is located when the user apparatus observes the link failure is determined based on the received beacon information and the information stored locally in advance. Or it can be determined that it is due to a handover preparation failure rather than a coverage issue, etc., so that the base station ignores the link failure message Bets can be, can help to optimize more exactly the network.

  Next, a method for analyzing the cause of link failure in the embodiment of the present invention will be described based on specific scenes with reference to the drawings. For example, when the user apparatus has a link failure (that is, the base station that is located when the user apparatus observes the link failure), the base station where the user apparatus UE is located is the base station A. In this embodiment, the base station The adjacent base stations of station A may include base station B and base station C, but in an actual network system, the number of adjacent base stations may be greater than 2, and the analysis process is This is similar to the case where two adjacent base stations are included, and here, an example in which the adjacent base stations include base station B and base station C will be described.

  In this embodiment, “After the link failure occurs, the UE reestablishes connection with the base station B by cell selection, and after the connection reestablishment failure, the UE successfully connects with the base station B by cell selection. Will be described. In addition, as a base station that has attempted re-establishment connection with the user apparatus and successfully established a connection, any base station, for example, base station A; other base station adjacent to base station A, for example, Base station C; may be another base station that is not adjacent to the base station A.

  FIG. 4A shows a method of analyzing the cause of link failure in Embodiment 4 of the present invention, and as shown in FIG. 4A, the method includes the following steps.

  Step 401: The user apparatus UE transmits a measurement report to the base station A where the user apparatus UE is located.

  In the present embodiment, when a trigger event occurs, the user apparatus UE transmits a measurement report to the base station A where the user apparatus UE is located. For example, the trigger event may be that the difference after subtracting the signal quality of the base station A from the signal quality of the base station B is larger than a predetermined threshold.

  Among them, the measurement report may include the measurement result of the own cell, the measurement result of the adjacent cell, and the like, and is similar to the conventional technique, and thus detailed description thereof is omitted here.

  Steps 402 and 402 ′: When the user apparatus UE needs to perform handover, the base station A where the user apparatus UE is located transmits a handover request to a plurality of target base stations.

  In this embodiment, the target base station is a base station adjacent to base station A, for example, base station B and base station C, and base station A makes a handover request to adjacent base station B and base station C. Send.

  Steps 403 and 403 ′: After receiving the handover request, the base station B and the base station C return a handover preparation failure message to the base station A.

  Step 404: After receiving after the handover preparation failure message, the base station A records the marker information of the UE, and the marker information includes the marker related to the UE and / or the base station A of the UE. Includes signs.

In this embodiment, the base station A may store the beacon information in the beacon information list. For example, the beacon for the UE is a unique beacon list for one UE, for example, as shown in Table 1. , ShortMAC-I list. Each indicator in the list corresponds to one cell of the target base station, and the indicator in the base station A of the UE may be C-RNTI, for example. May be stored. Table 1 shows the shortMAC-I list.

  Step 405: After the UE link fails, the UE attempts to reestablish connection.

  In this embodiment, RRC connection re-establishment is attempted. For example, connection re-establishment is attempted with the base station B by cell selection. The process of connection re-establishment is as shown in FIG. Therefore, detailed description is omitted here. In the connection re-establishment process, beacon information for the base station B, for example, shortMAC_I, C-RNTI is generated. However, since the base station B does not have the context of the UE, the connection re-establishment fails. End up.

  Step 406: The UE successfully establishes an RRC connection with the base station.

  In the present embodiment, the UE establishes a connection with the base station after a predetermined time has elapsed after the link failure, for example, establishes a connection with the base station B by cell selection. The detailed description is omitted here for the sake of detailed description.

  Step 407: After the UE has successfully established an RRC connection with the base station B, the UE generated when attempting to re-establish the connection to the network side (ie, base station B) when a link failure occurs Send sign information.

  In this embodiment, the UE may transmit the indicator information directly to the base station B by an arbitrary message, or may include the indicator information in a link failure report and transmit it to the base station B. .

  In the present embodiment, for example, the indicator information is included in the link failure indication message and transmitted to the base station B, and the link failure indication message is the only one UE related to one UE generated when attempting connection re-establishment. For example, shortMAC-I and / or an indicator used for the base station A in which the UE has failed to link, such as C-RNTI.

  Step 408: After receiving the indicator information, the base station B transmits the indicator information to the base station A, that is, the base station where the UE is located when the link failure occurs.

  In this embodiment, the base station B transmits the indicator information to the base station A by a link failure instruction message.

  However, a link failure report including the indicator information may be included in the link failure instruction message and transmitted to the base station A.

  Step 409: If the base station A receives the link failure instruction message transmitted by the base station B and determines that the marker information included in the instruction message is already recorded in the base station A, the base station A A ignores the link failure indication.

  In this embodiment, the base station A performs a search on a pre-stored beacon information list, determines whether the beacon information included in the link failure instruction exists in the beacon information list, and exists. If the UE indicates that the link failure is due to a handover preparation failure, the network can be optimized accurately.

  Step 410: The base station A deletes the stored tag information corresponding to the user apparatus.

  In the present embodiment, when the marker for the UE in the marker information is the list shown in Table 1, the list is deleted, and the marker information in the base station A of the UE, for example, C- When further including the RNTI, the base station also needs to delete the C_RNTI.

  In the present embodiment, the marker information list related to the UE recorded by the base station A may be deleted in the following cases, and will be described below with examples.

  Example 1: In steps 403, 403 ′, after all handover requests for the UE have been rejected, the UE completes a one-time successful handover preparation at the same base station, ie, base station A, That is, after transmitting the handover request at the base station A where the location is located, when the target base station (adjacent base station B or C) returns a handover request response message, The beacon list (eg, Table 1) regarding the UE and / or the bean used by the UE for the base station A where the link failure has occurred is deleted.

  Thus, before the link failure, after the steps 403 and 403 ′, the method further includes: the base station A transmits a handover request to the neighboring base station again, and the neighboring base station returns a handover request. Including deleting the information stored in the base station when a response message is received, wherein the neighboring base station is a base station B or a base station C.

  Example 2: After the beacon information is recorded in step 404, the beacon information list regarding the UE recorded on the base station side after a certain time has elapsed since the recorded beacon information was stored in the base station A ( Table 1) and / or the indicator used by the UE for the base station A in which the link failure has occurred.

  In this way, the method further deletes the stored information when the storage time of the information stored in the base station A exceeds a predetermined time.

  FIG. 4B shows a method of analyzing the cause of link failure in Embodiment 5 of the present invention. As shown in FIG. 4B, the differences from the fourth embodiment shown in FIG. 4A are in step 406 ′, step 407 ′, and step 409 ′, and the other steps are similar to the fourth embodiment. Among them, in step 406 ′: in the present embodiment, after the link failure of the user apparatus UE and a certain time has elapsed, a connection with the base station is established, for example, a connection with the base station A is established by cell selection, The process for establishing the connection is as shown in FIG. 6 and will not be described in detail here for the sake of detailed description. Step 407 ′: After the UE has successfully established an RRC connection with the base station A, the UE generates a connection reestablishment attempt when a link failure occurs on the network side (ie, the base station A). The sign information is sent. Step 409 ′: If the base station A determines that the tag information included in the instruction message has already been stored in the base station A after receiving the tag information, the base station A Ignore failure instructions.

  FIG. 4C shows a method for analyzing the cause of link failure in Embodiment 6 of the present invention. As shown in FIG. 4C, the difference from the fourth embodiment shown in FIG. 4A is that “Step 406”: In this embodiment, after the user apparatus UE fails to link and a certain time elapses, the base station Connection is established with the base station D, for example, by cell selection. At this time, the base station D is a base station not adjacent to the base station A, and the connection establishment process is shown in FIG. Step 407 ": After the UE has successfully established an RRC connection with the base station D, the UE is connected to the network side (ie base station). Step D 408 ": the base station D receives the beacon information and then, for example, links the beacon information to the station D). Instruction message To be transmitted to the base station A ”. Other steps are similar to those in the fourth embodiment, and thus detailed description thereof is omitted here.

  In the examples of FIGS. 4A to 4C described above, the base stations that have successfully established a connection with the UE are the base station A, the adjacent base station B, and the non-adjacent base station D. Further, in the above-described embodiment, the base station that performs the connection re-establishment attempt with the UE is also described as an example of the adjacent base station B. Detailed description is omitted.

  FIG. 5 shows a flowchart of a process in which a user apparatus and an adjacent base station attempt connection re-establishment in Embodiment 4 of the present invention. As shown in FIG. 5, the method includes the following steps.

  Step 501: The UE performs cell selection.

  Of these, the selection process is the same as in the prior art, and a detailed description thereof will be omitted here.

  Step 502: When the UE selects the base station B in step 501, the UE generates related information in the RRC connection re-establishment request message to the base station B, and the related information is transmitted to the base station B. User indicator information.

  For example, the marker information is shortMAC-I or the UE is a marker C-RNTI in the base station A.

  Step 503: The UE transmits an RRC connection re-establishment request to the base station B, and the RRC connection re-establishment request includes the generated indicator information.

  Step 504: Since the base station B does not have the context of the UE, the base station B rejects the re-establishment request by feeding back an RRC connection re-establishment rejection message.

  FIG. 6 shows a flowchart of a process for establishing an RRC connection between a user apparatus and a base station in Embodiment 4 of the present invention. As shown in FIG. 6, the following steps are included.

  Step 600: Cell selection is performed.

  Of these, the selection process is the same as in the prior art, and a detailed description thereof is omitted here.

  Step 601: The UE transmits an RRC connection request to the selected base station B.

  Step 602: After receiving the RRC connection request, the base station B returns an RRC connection establishment message to the UE.

  Step 603: After receiving the RRC connection establishment message, the UE sends an RRC connection establishment completion message to the base station B, and thus successfully establishes a connection between the UE and the base station B. Can be established.

  As can be seen from the above embodiment, the UE can transmit the beacon information to the base station after establishing the connection with the base station, and the beacon information is re-established after the user equipment fails to link. In this way, the base station, after receiving the beacon information, transmits the beacon information to the base station located when the user apparatus observes a link failure. Therefore, the base station uses the received beacon information and the information stored locally locally, so that the link failure is not a handover parameter installation problem or a coverage problem. Can be confirmed by failure. This allows the base station to ignore the link failure message and help to optimize the network more accurately, and the base station A can further Management can be performed, redundant information can be deleted at an appropriate timing, and the storage space of the base station can be saved.

  It should be understood by those skilled in the art that some or all of the steps of the methods in the embodiments described above may be completed by the program directing the associated hardware, such a program stored in a computer readable storage. When executed, the program includes all or part of the steps of the method in the above-described embodiments, and such storage medium includes R0M, RAM, magnetic disk, optical disk, etc. May be included.

  Embodiments of the present invention are further provided as described in the following embodiments for base stations and user equipment. Since the principle that the base station and the user equipment solves the problem is similar to the above-described method of analyzing the cause of link failure based on the base station and the user equipment, the implementation of the base station and the user equipment refers to the implementation of the method. Because of this, duplicate descriptions are omitted.

  FIG. 7 is a configuration diagram of a base station in Embodiment 7 of the present invention. The base station is a base station located when the user apparatus observes a link failure (the base station is also a base station where the user apparatus is located before the user apparatus link failure), and the base station is , After the UE link fails, it may be a base station that has successfully established a connection with the user equipment again, as shown in FIG. Includes unit 702.

  First receiving unit 701: Receives beacon information transmitted from another base station or user device, and the beacon information includes a beacon relating to the user device and / or a base located when the user device observes a link failure. It is a sign at the station, and its action is as described in Step 101 of the embodiment. Further, since specific sign information is as described in Examples 1 to 4, detailed explanation is omitted here. To do.

  First processing unit 702: When the base station determines that the indicator information is stored in the base station, it determines that the link failure is due to a handover preparation failure.

  In this embodiment, the method of transmitting the indicator information by the other base station or user apparatus is as described in Embodiment 1. For example, in this embodiment, the indicator information is included in the link failure instruction message. Or the indicator information may be included in the link failure report and transmitted in the link failure indication message.

  In this embodiment, the indicator information related to the user equipment may be a unique indicator related to the user equipment, for example, shortMAC-I, as described in the first embodiment, and the user equipment of the user equipment indicates that the link failure has occurred. The sign at the base station where the observation is made may be C-RNTI. The indicator information is information used when the user apparatus attempts to re-establish a connection, and the base station that attempts to re-establish connection with the user apparatus may be an arbitrary base station, Since it is as described in the above embodiment, detailed description is omitted here.

  In this embodiment, after receiving the sign information, the first processing unit 702 searches the sign information list stored locally in advance, and determines whether the sign information exists in the sign information list. If it is determined and exists, the link failure is considered to be due to a handover preparation failure.

  The base station may further include a storage unit 703, which stores a beacon information list for the user equipment. In this example, if the base station determines that the cause of the link failure is a handover preparation failure, the first processing unit 702 ignores the link failure report, and thus the base station Since the link failure cause is not determined to be a handover parameter installation or coverage problem, the network side can optimize the network more accurately.

  As can be seen from the above-described embodiment, the base station uses the received beacon information and pre-stored local information, and the link failure is not a handover parameter installation problem or a coverage problem, but a handover preparation failure. Can be confirmed according to. This allows the base station to ignore the link failure message and help to optimize the network more accurately.

  FIG. 8 is a configuration diagram of a base station according to Example 8 of the present invention. The base station is a base station that is located when the user apparatus observes a link failure, and the base station is also a base station that successfully establishes a connection with the user apparatus again after the UE link fails As shown in FIG. 8, the base station includes a first receiving unit 801, a first processing unit 802, and a storage unit 803, and their operations (functions) are similar to those of the fifth embodiment, so that detailed description will be given here. Is omitted.

  As shown in FIG. 8, the base station further includes a second processing unit 804, and the second processing unit 804 has the first processing unit 802 to store the indicator information in the base station in advance. When confirmed, the marker information stored in the base station is deleted.

  In this way, the base station can manage the stored information and save the storage space.

  In the present embodiment, the base station can obtain previously stored beacon information, that is, when the user apparatus needs to be handed over, the base station where the user apparatus is located (for example, , Base station A) at the same time, even after issuing a handover request to all possible target base stations of the user equipment, ie neighboring base stations (eg base station B and base station C) A target base station cannot be selected and a handover command cannot be transmitted to the user apparatus. (When one user apparatus attempts to perform a handover, the base station where the user station is located simultaneously sends a handover request to a plurality of base stations. For example, for each handover request, the base station receives a corresponding handover preparation failure message, at which time the user The base station in which the device is located (eg, base station A in FIG. 1) is responsible for identifying information about the user equipment (eg, a single indication for the terminal corresponding to all possible target base stations, eg shortMAC-I A list and / or an indicator in the base station A of the terminal, eg C_RNTI) can be recorded.

  Thus, as shown in FIG. 8, the base station further includes a first transmission unit 805 and a third processing unit 806, of which the first transmission unit 805 is to be handed over by the user equipment before link failure. The base station is used to send a handover request to all possible target base stations.

  The third processing unit 806 is used to store the following beacon information when receiving the handover preparation failure message returned by the target base station, i.e. the beacon for the user equipment and / or the user. It is an indicator in the base station of the device, of which the information may be stored in the storage unit 803 in a list manner.

  In this embodiment, the base station further receives a unit for transmitting a handover request to the target base station, and a handover preparation failure message returned by the neighboring base station based on the handover request. And a unit for transmitting a handover command to the user apparatus. Since this part is similar to the prior art, detailed description thereof is omitted here.

  In this embodiment, as shown in FIG. 8, the base station may further include a fourth processing unit 807, and the fourth processing unit 807 has a predetermined storage time of the tag information stored in the base station. Used to delete the stored marker information when the time is exceeded.

  Also, after all handover requests for the user equipment are rejected before link failure (for each handover request, the base station receives a corresponding handover preparation failure message), the user equipment Complete one successful handover preparation under the same base station (for example, base station A where it is located sends a handover request and then target base station B returns a handover request response message) In such a case, the base station further includes a second transmission unit and a fifth processing unit (not shown).

  The second transmission unit is used for transmitting a handover request to an adjacent base station after the base station receives the handover preparation failure message returned from the target base station, and the fifth processing unit is used for the target base station. Is used to delete the tag information stored in the base station when the handover request response message returned by is received. In the present embodiment, the label information to be specifically excluded is as described in the first to fourth embodiments, and thus detailed description thereof is omitted here.

  As can be seen from the above embodiment, the base station uses the received beacon information and the information stored locally in advance, the link failure is due to the handover preparation failure, and the handover parameter installation problem or It can be determined that it is not due to a coverage problem. This allows the base station to ignore the link failure message, help to optimize the network more accurately, and manage its stored information to save storage space You can also.

  FIG. 9 is a configuration diagram of a base station in Embodiment 9 of the present invention. The base station is a base station that has reestablished a connection with the UE after a user apparatus link failure. For example, the base station is an adjacent base station of the base station A, for example, the base station B and the base station C. It may be a base station A (see Examples 7 and 8), or may be a base station that is not adjacent.

  As shown in FIG. 9, the base station includes a third receiving unit 901 and a third transmitting unit 902.

  The third receiving unit 901 is for receiving the sign information transmitted from the user apparatus after the base station has successfully established a connection with the user apparatus, of which the sign information is the user apparatus And / or a sign at the base station where the user apparatus observes a link failure, and the sign information is used when the user apparatus attempts to reestablish a connection after the link failure. Information.

  Third transmission unit 902: used to transmit the beacon information to the base station where the user equipment is located when observing link failure.

  In the present embodiment, the UE may transmit the indicator information directly to the base station. For example, the UE may include the indicator information in a link failure instruction message.

  In addition, the user apparatus may include the indicator in a link failure report and transmit it to the base station by a link failure instruction message. In this case, the third receiving unit 901 transmits the link failure instruction transmitted by the user apparatus. It is used to receive a message, and the indicator information in the link failure report can be obtained from the message. The third transmission unit 902 is used for transmitting a link failure report including the indicator information to the base station located when the user apparatus observes the link failure by a link failure instruction message.

  The base station may further include a unit for establishing a connection with the user equipment, and the connection establishment process is similar to that of the prior art, for example, as described in the embodiment and FIG. Therefore, detailed description is omitted here.

  In this embodiment, the base station further includes a unit for receiving a handover request transmitted from the base station where the user apparatus is located when a link failure occurs, and a handover based on the handover request. A unit for returning a preparation failure message may be included.

  As can be seen from the above-described embodiment, the base station transmits the marker information of the user apparatus to the base station where the user apparatus observes link failure, and when the user apparatus observes link failure. Based on the beacon information and the stored information, the base station in which it is located can determine whether or not it is due to a handover preparation failure, which can accurately determine the cause of link failure, and improve network performance. It is advantageous for optimization.

  FIG. 10 is a configuration diagram of a user apparatus in Embodiment 10 of the present invention. As shown in FIG. 10, the user apparatus includes a sixth processing unit 1001 and a fourth transmission unit 1002.

  The sixth processing unit 1001 is used to generate beacon information related to the user apparatus when the user apparatus attempts to reestablish a connection with the base station when a link failure occurs. Therefore, the detailed description is omitted here. The fourth transmission unit 1002 is used to transmit the indicator information to the base station after successfully establishing a connection with the base station, of which the indicator information is transmitted to the base station by a link failure indication message. The indicator information may be included in the link failure report and transmitted to the base station by a link failure instruction message. As described in the above-described embodiment, detailed description is omitted here. To do.

  In the above-described embodiment, the base station that has attempted to re-establish connection with the user apparatus or has successfully established a connection may be any base station, as described in the above-described embodiment. Therefore, detailed description is omitted here.

  The user equipment may further include a connection establishment unit, which is used to establish a connection with the other base station, and the establishment connection process is similar to that of the prior art. Since it is as described in FIG. 6, detailed description is omitted here.

  The user equipment may further include a connection re-establishment unit, which means that the user equipment is not adjacent to the base station A or a base station adjacent to the base station A when a link failure occurs. The re-establishment process is used to establish a re-establishment connection with the base station, and the re-establishment process is similar to that of the prior art and is described in the fourth embodiment and FIG.

  As can be seen from the above-described embodiment, the user apparatus transmits a beacon information to the base station after establishing a connection with the base station, and the base station transmits the beacon information to the base station. The base station located when the user apparatus observes the link failure is transmitted to the base station located at the time of observation, and the base station located when the user equipment observes the link failure determines whether or not due to the handover preparation failure based on the indicator information and the stored information. This makes it possible to accurately determine the cause of link failure, which is advantageous for optimizing network performance.

  FIG. 11 shows a method of analyzing the cause of link failure in Embodiment 11 of the present invention. For the base station where the user equipment is located before the link failure (which is also the base station where the user equipment is located when the user equipment observes the link failure), as shown in FIG. 11, the method includes the following steps: .

  Step 1101: When the user equipment needs to be handed over, the base station where the user equipment is located sends a handover request message to all possible target base stations.

  In this embodiment, one base station requests handover to all possible target base stations (neighboring base stations, eg, base station B and base station C as shown in FIGS. 4A-4C) of one user equipment. Even after wakeup, it is not possible to select one appropriate target base station, and thus a handover command cannot be transmitted to the user equipment (when one user equipment tries to perform handover, the base station where it is located Handover requests can be sent to multiple base stations).

  Step 1102: Receive a handover preparation failure message returned from the target base station based on the handover request message.

  Step 1103: The base station transmits a handover preparation failure instruction to the user apparatus.

  In this embodiment, for example, for each transmitted handover request, when the base station receives a corresponding handover preparation failure message, the base station in which the user apparatus is located (for example, the base station in FIG. 4A). A) can send one handover preparation failure instruction to the user equipment.

  After the user equipment link fails, the user equipment can establish a connection with the base station of the cell by selecting a cell, and the base station that establishes a connection with the user equipment It may be a base station, for example, a base station located when a user apparatus observes a link failure.

  In such a case, the method further comprises that the base station receives the handover preparation failure instruction transmitted by the user equipment after the user equipment has successfully established a connection with the base station. May be included. This step is an optional step.

  Further, the base station that establishes a connection with the user apparatus may be another base station (a base station adjacent to or not adjacent to the base station).

  In such a case, the method further receives the handover preparation failure indication transmitted by the other base station after the user apparatus has successfully established a connection with the other base station. You may include that. This step is an optional step.

  Among them, when the handover preparation failure instruction is included in the link failure instruction and transmitted to the base station, the base station transmits the handover preparation failure instruction transmitted by the user apparatus or the other base station. The base station receives the link failure indication including the indication, but the base station ignores the link failure indication.

  FIG. 12 shows a method of analyzing the cause of link failure in Embodiment 12 of the present invention. For user equipment, as shown in FIG. 12, the method includes the following steps:

  Step 1201: The user equipment receives the handover preparation failure instruction transmitted by the base station where the user equipment is located.

  Step 1202: After a link failure, the user equipment transmits a handover preparation failure instruction to the base station or another base station after establishing a connection with the base station or another base station.

  In this embodiment, the handover preparation failure indication may be included in the link failure report and transmitted to the base station or another base station by a link failure indication message, and may be included in the link failure report without being included in the link failure report. It may be included in the link failure indication message together with the link failure report and transmitted to the base station or another base station.

  Further, after the link failure, before step 1202, the user apparatus further attempts to re-establish the connection with the base station and the connection has failed. The base station that attempts to reestablish connection with the user apparatus may be a base station that is located when the user apparatus observes a link failure, and is adjacent to a base station that is located when the user apparatus observes a link failure. It may be a base station or a non-adjacent base station.

  As can be seen from the above embodiment, the base station in which the user apparatus is located can transmit an instruction of handover preparation failure to the user apparatus, which allows the user apparatus to succeed with the base station. After the RRC connection is established on the back side, the handover preparation failure instruction can be transmitted to the network side (for example, base station B). In this way, the network side causes the link failure cause to be the handover preparation failure. It can be determined that it is not a handover parameter installation or coverage problem, which is advantageous for network optimization.

  FIG. 13 shows a method of analyzing the cause of link failure in the thirteenth embodiment of the present invention. For the base station, as shown in FIG. 13, the method includes the following steps.

  Step 1301: After successfully connecting with the user equipment, an instruction of handover preparation failure transmitted by the user equipment is received.

  Step 1302: The handover preparation failure instruction is not transmitted or transmitted to the base station where the user apparatus observes the link failure.

  In the present embodiment, the handover preparation failure instruction is included in the link failure instruction, and is not transmitted to the base station where the user apparatus observes the link failure.

  As can be seen from the above-described embodiment, the user apparatus successfully establishes an RRC connection with a certain base station, and then transmits a handover preparation failure instruction to the network side (for example, base station B). Can determine that the cause of link failure is handover preparation failure, and at this time, the base station transmits an indication of the handover preparation failure to the base station where the user apparatus is located when the link failure occurs In addition, the base station may transmit an instruction for failure in preparation for handover to the base station located when the user apparatus observes link failure.

  Next, a method for analyzing the cause of link failure in the embodiment of the present invention will be described based on specific scenes with reference to the drawings. For example, when the user apparatus has a link failure (that is, when link failure is observed), the base station in which the user apparatus UE is located is the base station A, and in this embodiment, the base station adjacent to the base station A Includes a base station B and a base station C, but in an actual network system, the number of neighboring base stations may be greater than two, and the analysis process is similar to the case of including two neighboring base stations. Therefore, here, an example in which the adjacent base stations include the base station B and the base station C will be described.

  In this embodiment, when the link of the user equipment fails, the user equipment attempts to reestablish a connection with an adjacent base station (for example, base station B or C), base station A or another base station, and reestablishes the connection. After an unsuccessful establishment attempt, the user equipment successfully establishes a connection with the base station, which may be the neighboring base stations B, C, or not. Base station A may also be used. In the following embodiment, an example will be described in which the user apparatus selects an adjacent base station B and attempts to reestablish connection with it, and selects the base station B and performs RRC connection therewith.

  FIG. 14A shows a method of analyzing the cause of link failure in Embodiment 14 of the present invention, and as shown in FIG. 14A, the method includes the following steps.

  Step 1401: The user apparatus UE transmits a measurement report to the base station A where it is located.

  Since this embodiment is similar to step 401 in FIG. 4A, detailed description thereof is omitted here.

  The measurement report may include a measurement result of the own cell, a measurement result of an adjacent cell, and the like, and is similar to the related art, and thus detailed description is omitted here.

  Steps 1402 and 1402 ′: When the user apparatus UE needs to be handed over, the base station A where the user apparatus UE is located transmits a handover request to a plurality of target base stations at the same time.

  In this embodiment, the base station A transmits a handover request to the adjacent base station B and base station C.

  Steps 1403 and 1403 ′: After receiving the handover request, the base station B and the base station C return a handover preparation failure message to the base station A.

  Step 1404: After receiving the handover preparation failure message, the base station A transmits a handover preparation failure instruction to the user apparatus.

  Step 1405: After link failure, the UE attempts to reestablish connection with the base station.

  In the embodiment, the RRC connection is reestablished, for example, the base station B is selected and the connection reestablishment attempt is performed. However, since the base station B does not have the context of the UE, the reestablishment of the connection is performed. Since the process has failed and the specific process can refer to Step 405 of Example 4A and FIG. 5, detailed description thereof is omitted here.

  Step 1406: The UE establishes an RRC connection successfully with the base station.

  In this embodiment, the base station that successfully establishes an RRC connection with the UE may be base station A, base station B or C, or another base station, for example, the UE may be a base station B may be selected to establish a connection with it, and the specific process thereof can be referred to step 406 of FIG. 4A and FIG.

  Step 1407: After the UE has successfully established an RRC connection with the base station B, the UE sends an indication of the link failure to the network side (ie, the base station B).

  In this embodiment, the handover preparation failure instruction may be included in the link failure report and transmitted by a link failure instruction message, or the handover preparation failure instruction may be included in the link failure instruction message and transmitted. Good.

  Step 1408: The base station B does not transmit a link failure instruction to the base station A after receiving the handover preparation failure instruction.

  Alternatively, in the present embodiment, step 1408 ′ is included, and in this step, after receiving the handover preparation failure instruction, the base station B includes the handover preparation failure instruction in the link failure instruction. You may send it to A.

  FIG. 14B shows a method of analyzing the cause of link failure in Embodiment 15 of the present invention. Example 15 differs from Example 14 as shown in FIG. 14A: “In Step 1406 ′, the UE selects Base Station A to establish a connection and successfully Establish a connection; in step 1407 ′, the UE sends a handover preparation failure indication to base station A, which is optional ”.

  FIG. 14C shows a method of analyzing the cause of link failure in Embodiment 16 of the present invention. The embodiment 16 differs from the embodiment 14 as shown in FIG. 14A in that, in “step 1406”, the UE selects the base station D and establishes a connection with it, and also successfully connects. In step 1407 ", the UE sends a handover preparation failure indication to base station D, which is not a base station adjacent to base station A; in step 1408" Station D does not send the handover preparation failure indication to base station A; step 1409 may also be provided, in which base station D informs base station A that the handover preparation failure Send instructions. "

  As can be seen from the above-described embodiment, the UE receives the handover preparation failure instruction transmitted from the base station A and, after establishing a connection with the base station, sends the handover preparation failure instruction to the base station A. Thus, after receiving the instruction, the base station may or may not transmit the handover preparation failure instruction to the base station where the user equipment is located when a link failure occurs. Therefore, the base station can determine that the link failure is due to handover preparation failure and not due to handover parameter installation problem or coverage problem, etc. The link failure message can be ignored and can help to optimize the network more accurately.

  Those skilled in the art should understand that all or some of the steps of the methods in the above-described embodiments may be completed by a program instructing relevant hardware, which is stored on a computer-readable storage medium. When the program is executed, the method may include all or a part of the method in the above-described embodiments, and the storage medium may include R0M, RAM, magnetic disk, optical disk, and the like. It is good.

  Embodiments of the present invention are further provided for base stations and user equipment as described in the following embodiments. The principle by which the base station and the user equipment solve the problem is similar to the above-described method of analyzing the cause of link failure based on the base station and the user equipment, so the implementation of the base station and the user equipment is referred to the implementation of the method. Therefore, duplicate descriptions are omitted.

  FIG. 15 is a configuration diagram of a base station in Embodiment 17 of the present invention. The base station refers to a base station where the user apparatus is located before the link failure (a base station located when the user apparatus observes the link failure), for example, the base station A. As shown in FIG. 15, the base station includes a fifth transmission unit 1501, a fourth reception unit 1502, and a seventh processing unit 1503.

  The fifth transmission unit 1501 is used to transmit a handover request message to all possible target base stations when the user equipment needs to be handed over before link failure.

  The fourth receiving unit 1502 is used for receiving a handover preparation failure message returned from the target base station based on the handover request message.

  The seventh processing unit 1503 is used to transmit a handover preparation failure instruction to the user apparatus.

  Since the operation process of the base station is as described in Example 11 as shown in FIG. 11, detailed description thereof is omitted here.

  The base station may further include a fifth receiving unit (not shown), of which, after the user equipment has successfully established a connection with another base station, It is used for receiving the handover preparation failure instruction transmitted by the other base station. When the other base station at this time includes the instruction in the link failure instruction and transmits it, or includes the instruction in the link failure report and transmits it by the link failure instruction, the base station transmits the link failure instruction. Can be ignored.

  In another embodiment, if the user equipment successfully establishes a connection with the base station after a link failure, the fifth receiving unit may accept the user equipment after the user equipment has successfully established a connection with the base station. , Used to receive an instruction of handover preparation failure transmitted by the user apparatus. In the embodiment described above, the fifth receiving unit is optional.

  FIG. 16 is a configuration diagram of a user apparatus in Embodiment 18 of the present invention. As shown in FIG. 16, the user apparatus includes a sixth receiving unit 1601 and an eighth processing unit 1602.

  The sixth receiving unit 1601 is used to receive a handover preparation failure instruction transmitted by the base station where the user apparatus is located. The eighth processing unit 1602 transmits a handover preparation failure instruction to the base station or another base station after the user apparatus establishes a connection with the base station or another base station after a link failure. The handover preparation failure indication may be included in the link failure report and transmitted to other base stations.

  The user equipment may further include a connection establishment unit, which is used to establish a connection with the base station or another base station, and the connection establishment process is similar to the prior art, Since it is as described in Example 4 and FIG. 6, detailed description is omitted here.

  The user equipment may further include a connection re-establishment unit, which is used to attempt connection re-establishment with the adjacent base station when the link of the user equipment fails, and the connection establishment process is performed according to the related art. Since it is similar to that described in Example 4 and FIG. 5, detailed description thereof is omitted here.

  FIG. 17 is a configuration diagram of a base station in Embodiment 15 of the present invention. The base station refers to a base station that has successfully established a connection with the user equipment, and the base station may be an adjacent base station, for example, the base station B or C, and not the adjacent base station. Also good. As shown in FIG. 17, a seventh receiving unit 1701 and a tenth processing unit 1702 are included.

  Seventh receiving unit 1701: Used to receive a handover preparation failure instruction transmitted by the user equipment after the base station has successfully connected with the user equipment.

  Ninth processing unit 1702: Used to transmit or not transmit the handover preparation failure indication to the base station where the user equipment observes the link failure.

  In addition, the base station may further include a connection establishment unit, which is used to establish a connection with the user equipment. The connection establishment process is similar to the prior art, and is described in Example 4 and FIG. Therefore, detailed description is omitted here.

  As can be seen from the above embodiment, when the user equipment tries to perform handover, the base station A where the UE is located transmits a handover request to the neighboring base station and receives a handover preparation failure message. A handover preparation failure instruction is transmitted to the user terminal, whereby the user apparatus transmits a link failure report carrying a handover preparation failure instruction to the base station after establishing a connection with a certain base station, In this way, after receiving the link failure report, the base station transmits or does not transmit the link failure report to the base station where the user equipment is located when the link failure occurs, so that the base station The link failure is due to handover preparation failure, such as handover parameter installation problem or coverage problem. The Most can be determined, thereby, the base station, it is possible to ignore the link failure message, it can help to optimize the network more precisely.

  Embodiments of the present invention further provide a computer readable program, of which when executing the program at a base station, the program is transmitted to the computer at the base station according to the embodiments 1, 2, 4-6, 11 , 13, and 14 to 16 are executed.

  The embodiments of the present invention further provide a storage medium storing a computer-readable program, wherein the computer-readable program is transmitted to a computer at a base station according to the first, second, fourth to sixth, eleventh, thirteenth, and fourteenth embodiments. The method for analyzing the cause of link failure described in ˜16 is executed.

  Embodiments of the present invention further provide a computer readable program, of which when executing the program on a user device, the program is transmitted to a computer on the user device according to the third, fourth to sixth, 12, 14 to The method of analyzing the cause of link failure described in 16 is executed.

  Embodiments of the present invention further provide a storage medium storing a computer-readable program, wherein the computer-readable program is described in Embodiments 3, 4-6, 12, 14-16 in a user device on a computer. Execute a method to analyze the cause of link failure in

  The above-described apparatus and method of the present invention may be realized by hardware, or may be realized by a combination of hardware and software. The present invention also relates to such a computer-readable program, that is, when the program is executed by the logic unit, the logic unit can realize the above-described apparatus or component. Alternatively, the above-described various methods or steps can be realized in the logic unit. The logic component is, for example, a field programmable logic component, a microprocessor, or a processor used in a computer. The present invention further relates to a storage medium storing the above-described program, for example, a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, a magnetic optical disk, a memory card, a memory stick, and the like.

The preferred embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and all modifications to the present invention belong to the technical scope of the present invention unless departing from the spirit of the present invention.

Claims (7)

A base station,
A receiving unit that receives the beacon information transmitted by the user apparatus after the base station establishes a connection with the user apparatus, wherein the beacon information includes the beacon information about the user apparatus and / or the user apparatus. A receiving unit that is indicator information regarding the user equipment in the base station of the cell where the link failure is observed; and the identification information is transmitted to the base station of the cell located when the user equipment observes the link failure A base station including a transmission unit. The base station according to claim 1, wherein
The indicator information is information used when the user apparatus attempts to reestablish a connection after a link failure. The base station according to claim 1, wherein
The said label | marker information is a base station which is C-RNTI (Cell Radio Network Temporary Identifier). The base station according to claim 1, wherein
The connection is a base station which is an RRC (Radio Resource Control) connection. A user device,
A processing unit that generates beacon information about the user apparatus based on the occurrence of a link failure; and a transmission unit that transmits the beacon information to the base station after establishing a connection with a base station, A user equipment comprising a transmission unit, which is a sign concerning a user equipment and / or a sign at a base station of a cell where the user equipment observes a link failure. The user device according to claim 5,
The said label | marker information is a user apparatus which is C-RNTI (Cell Radio Network Temporary Identifier). The user device according to claim 5,
The connection is a user device, which is an RRC (Radio Resource Control) connection.

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