RU2628531C2 - Method of communication failure cause analysis, method of network and device optimisation - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: method includes: determining when the link failure occurs, detailed initiation information causing link failure; analysis of link failure cause in accordance with the detailed initiation information causing link failure; and transmitting link failure cause obtained by the analysis to network side. In addition, the UE may transmit detailed causes in the detailed configuration information, received by the analysis, to the network side, so that the network side determines the root cause of link failure in accordance with cause or in accordance with cause in combination with the measurement result in order to take appropriate actions for more accurate network optimisation.

EFFECT: optimisation of the wireless network.

7 cl, 14 dwg

Description

FIELD OF THE INVENTION

The present invention relates to the field of communication and, specifically, to a method for analyzing the causes of communication line failures, a network optimization method and a device.

BACKGROUND OF THE INVENTION

In a self-optimization network (SON), after a communication link failure occurs in the terminal equipment, the terminal equipment provides relevant information regarding the local cell and neighboring cells in the communication link failure, such as measurement information and location information, etc., to the network side . The network side then analyzes the cause of the link failure in accordance with this information to take appropriate measures to optimize system performance.

When implementing the present invention, the developers found that the disadvantage of the prior art is that since there are many reasons for the link failure, relevant information regarding the local cell and neighboring cells in the link failure, such as measurement information and location information, etc. provided by the terminal equipment to the network side is incapable of making the network side adopt an appropriate optimization mechanism.

SUMMARY OF THE INVENTION

An object of embodiments of the present invention is to provide a method for analyzing a cause of a communication link failure, a network optimization method, and a device. With these methods, detailed information regarding the link failure is provided to the network side, thereby causing the network side to more accurately optimize the network.

In accordance with one aspect of embodiments of the present invention, a method is provided for analyzing a cause of a link failure, including:

determining when a link failure occurs, detailed initiation information causing the link failure;

analysis of the cause of the failure of the communication line in accordance with the detailed information of the initiation causing the failure of the communication line; and

the transmission of the cause of the link failure, obtained through analysis, to the network side.

In accordance with another aspect of embodiments of the present invention, there is provided an apparatus for analyzing a cause of link failure, including:

a first processing unit, configured to determine when a link failure occurs, detailed initiation information causing the link failure;

a second processing unit configured to analyze the cause of the link failure in accordance with the detailed initiation information causing the link failure; and

a first transmission unit, configured to transmit the cause of the link failure obtained by analysis to the network side.

In accordance with a further aspect of embodiments of the present invention, there is provided a method for analyzing a cause of a link failure, including:

obtaining the cause of the failure of the communication line transmitted by the user side; and

determining the cause of the failure of the communication line, in accordance with the received cause of the failure of the communication line, or in accordance with the received cause of the failure of the communication line together with the measurement result.

In accordance with another aspect of embodiments of the present invention, a network optimization method is provided, including:

obtaining the cause of the failure of the communication line transmitted by the user side;

determining the cause of the failure of the communication line, in accordance with the received cause of the failure of the communication line, or in accordance with the received cause of the failure of the communication line together with the measurement result; and

network optimization in accordance with a specific cause of communication line failure.

In accordance with yet another aspect of embodiments of the present invention, there is provided an apparatus for analyzing a cause of link failure, including:

a third processing unit configured to obtain a cause of failure of a communication line transmitted by a user side; and

the fourth processing unit, configured to determine the cause of the failure of the communication line, in accordance with the received cause of the failure of the communication line, or in accordance with the received cause of the failure of the communication line together with the measurement result.

In accordance with yet another aspect of embodiments of the present invention, a network optimization device is provided, including:

the fifth processing unit, configured to obtain the cause of the failure of the communication line transmitted by the user side; and

a sixth processing unit, configured to determine the cause of the failure of the communication line, in accordance with the received cause of the failure of the communication line, or in accordance with the received cause of the failure of the communication line together with the measurement result; and

the first optimization unit, configured to optimize the network according to a specific cause of communication line failure.

In accordance with yet another aspect of embodiments of the present invention, a method is provided for analyzing a cause of a link failure, including:

determining when a link failure occurs, detailed initiation information causing the link failure; and

transmission of detailed initiation information, as a cause of the link failure, to the network side.

In accordance with yet another aspect of embodiments of the present invention, there is provided an apparatus for analyzing a cause of link failure, including:

a seventh processing unit, configured to determine when a link failure occurs, detailed initiation information causing the link failure; and

a second transmission unit, configured to transmit detailed initiation information, as a cause of the link failure, to the network side.

In accordance with yet another aspect of embodiments of the present invention, a method is provided for analyzing a cause of a link failure, including:

obtaining detailed initiation information causing a link failure transmitted by the user side; and

determining the cause of the communication line failure in accordance with the received detailed initiation information, or in accordance with the received detailed initiation information together with the measurement result.

In accordance with another aspect of embodiments of the present invention, there is provided an apparatus for analyzing a cause of link failure, including:

an eighth processing unit configured to obtain detailed initiation information causing a link failure transmitted by the user side; and

the ninth processing unit, configured to determine the cause of the failure of the communication line, in accordance with the received detailed information of the initiation, or in accordance with the received detailed information of the initiation together with the measurement result.

In accordance with another aspect of embodiments of the present invention, a network optimization method is provided, including:

obtaining detailed initiation information causing a link failure transmitted by the user side;

determining the cause of the failure of the communication line, in accordance with the received detailed information of the initiation, or in accordance with the received detailed information of the initiation together with the measurement result; and

network optimization in accordance with a specific cause of communication line failure.

In accordance with yet another aspect of embodiments of the present invention, a network optimization device is provided, including:

a tenth processing unit configured to obtain detailed initiation information causing a link failure transmitted by the user side;

the eleventh processing unit, configured to determine the cause of the failure of the communication line, in accordance with the received detailed information of the initiation or in accordance with the received detailed information of the initiation together with the measurement result; and

a second optimization unit configured to optimize the network according to a specific cause of the link failure.

In accordance with yet another aspect of embodiments of the present invention, a computer-readable program is provided, and when the program is executed on a device for analyzing a cause of communication failure, the program allows the computer to execute a method for analyzing the cause of communication failure, as described above in the device.

In accordance with another aspect of embodiments of the present invention, there is provided a storage medium in which a computer-readable program is stored, the computer-readable program allowing the computer to perform a method for analyzing the cause of a communication failure, as described above in the apparatus for analyzing the cause of the communication failure.

In accordance with another aspect of embodiments of the present invention, a computer-readable program is provided, wherein when the program is executed in a network optimization device, the program allows the computer to execute a network optimization method as described above in the device.

In accordance with another aspect of embodiments of the present invention, a storage medium is provided in which a computer-readable program is stored, the computer-readable program allowing a computer to perform a network optimization method as described above in a network optimization device.

An advantage of the embodiments of the present invention is that detailed information regarding the link failure is provided to the network side by the terminal equipment, thereby causing the network side to more accurately optimize the network.

With reference to the following description and drawings, specific embodiments of the present invention are described in detail, and the principle of the present invention and methods of use are indicated. You must understand that the scope of embodiments of the present invention is not limited to this. Embodiments of the present invention contain many alternatives, changes and equivalents in the scope and form of the terms of the attached claims.

Features that are described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments and / or in conjunction with or instead of features of other embodiments.

It must be emphasized that the term "includes / including" when used in this description is used to determine the presence of installed features, systems, steps or components, but does not exclude the presence or addition of one or more other features, systems, steps, components or their groups.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention should be apparent from the following detailed description in conjunction with the drawings, in which:

FIG. 1 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 1 of the present invention;

FIG. 2 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 2 of the present invention;

FIG. 3 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 2 of the present invention;

FIG. 4 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 5 of the present invention;

FIG. 5 is a flowchart of a network optimization method of Embodiment 6 of the present invention;

FIG. 6 is a schematic diagram of a structure of an apparatus for analyzing a cause of a link failure of an embodiment 7 of the present invention;

FIG. 7 is a schematic diagram of a structure of an apparatus for analyzing a cause of a link failure of an embodiment 8 of the present invention;

FIG. 8 is a schematic structural diagram of a network optimization apparatus of Embodiment 9 of the present invention;

FIG. 9 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 10 of the present invention;

FIG. 10 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 11 of the present invention;

FIG. 11 is a flowchart of a network optimization method of Embodiment 12 of the present invention;

FIG. 12 is a schematic diagram of a structure of an apparatus for analyzing a cause of a link failure of an embodiment 13 of the present invention;

FIG. 13 is a schematic diagram of a structure of an apparatus for analyzing a cause of a link failure of an embodiment 14 of the present invention; and

FIG. 14 is a schematic structural diagram of a network optimization apparatus of Embodiment 15 of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Various embodiments of the present invention are described below with reference to the accompanying drawings. These embodiments are illustrative only and are not intended to limit the invention. For an easy understanding of the principle and embodiments of the present invention by those skilled in the art, embodiments of the present invention should be described by taking an example of an SON link failure reason analysis. However, it must be understood that the present invention is not limited to this and is applicable to other systems related to the cause of communication link failure.

In an actual network system, there are many causes for link failure. However, in the prior art, after a communication link failure in the terminal equipment occurs, the terminal equipment provides relevant information regarding the local cell and neighboring cells in the communication link failure, such as measurement information and location information, etc., network side. Such information is insufficient to force the network side to accurately determine the root cause of the link failure and, therefore, cannot accurately perform the optimization. Therefore, with embodiments of the present invention, detailed information, such as detailed initiation information causing a link failure, is provided to the network side, thereby causing the network side to optimize the network more accurately.

In addition, the terminal equipment can further analyze the detailed initiation information causing the link failure, such as a physical layer problem, a medium access control (MAC) layer random process failure and the number of retransmissions in the radio link control (RLC) layer reaching a maximum value etc., for a more detailed reason for the failure of the communication line. However, in the prior art, the terminal equipment does not differentiate the causes of the communication line failure and cannot provide information regarding the detailed causes of the communication line failure to the network side, therefore, the network side cannot use more suitable measures to optimize the network. With the embodiments of the present invention, the network side can be provided with detailed information regarding the link failure, and therefore obtain more accurately optimized network performance.

A method for analyzing the cause of a link failure of an embodiment of the present invention will be described in detail below.

FIG. 1 is a flowchart of a method for analyzing a cause of a link failure of Embodiment 1 of the present invention. As shown in FIG. 1, the method includes:

step 101: determining when a communication link failure occurs, detailed initiation information causing the communication link failure;

in this embodiment, there is very detailed initiation information causing a link failure, such as a physical layer problem, a random access problem of a medium access control layer and a transmission problem of an uplink radio link control layer, etc .;

for example, when the UE does not receive enough indication (such as N311, see 3GPP TS36.331) regarding a better-becoming communication line (such as synchronization indication, see 3GPP TS36.331) for a period of time (such as T310, see 3GPP TS36.331), the UE may determine that the detailed link failure initiation information is a physical layer problem;

or when the UE receives an indication of a failure of a MAC layer random access procedure, it may determine that the detailed link failure initiation information is a MAC layer random access problem;

or when the number of retransmissions at the RLC level reaches a maximum value, the UE may determine that the detailed link failure initiation information is a transmission problem of the RLC level;

step 102: analyzing the cause of the link failure in accordance with the detailed initiation information causing the link failure;

in this embodiment, the UE may analyze the detailed causes of the link failure for various pieces of initiation information, such as a handover configuration problem, a coverage hole and a MAC layer random access problem;

step 103: transmitting the cause of the link failure obtained by analysis to the network side.

in this embodiment, the UE can transmit the detailed reason in the detailed configuration information obtained by analysis to the network side, so that the network side determines the root cause of the communication failure in accordance with this reason or in accordance with the reason together with the measurement result, so that take appropriate measures to more accurately optimize the network;

moreover, the cause of the link failure in the detailed configuration information may be included in the link failure information for transmission to the network side; however, it is not limited to this, and other messages can be used to transmit information.

A method for analyzing the cause of a link failure in the detailed initiation information causing the link failure should be described in detail below with reference to the accompanying drawings.

FIG. 2 is a flowchart of a method for analyzing a cause of a link failure of Embodiment 2 of the present invention. This embodiment is described taking into account the physical layer problem as an example. As shown in FIG. 2, the method includes:

step 201: determining by the UE that the link failure is a downlink physical layer problem;

in this embodiment, can it be estimated whether the T310 timer has expired and the link failure can be defined as a downlink physical layer problem if the timer expires;

step 202: determining whether a measurement report is triggered and performing step 203 when the measurement report is triggered; otherwise, step 205 is executed;

in this embodiment, any method in the prior art can be used to determine whether to initiate a measurement report, such as determining by evaluating whether a measurement report initiation event occurs; for example, a measurement report is triggered when the signal intensity / quality of a neighboring cell is greater than the serving cell by a threshold value;

step 203: determining by the UE that the cause of the link failure is a handover configuration problem when a measurement report is triggered at step 202;

in this case, a handover configuration problem may occur because a handover parameter (such as an individual cell offset, see 3GPP TS36.331) of the UE for the target cell is set too small, resulting in the UE not completing the transfer serving when the serving cell signal received by the UE is very weak;

step 204: recording the result of the analysis by the UE;

in this embodiment, the UE may in this case write the analysis result “handover configuration problem” to the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in the case of a downlink physical layer problem, the analysis result “handover configuration problem” can be written in the following way: “handover configuration problem (physical layer problem, measurement report initiated)”; or “handover configuration problem (T310 expires, measurement report initiated)”, etc .;

moreover, “initiated measurement report” may be optional information and may not be recorded;

step 205: further determining by the UE whether there is a neighboring cell with better signal quality when it is determined in step 202 that the measurement report is not triggered and step 206 is performed when the result of the assessment is “yes”; otherwise, step 208 is performed;

step 206: determining by the UE that the cause of the link failure is a handover configuration problem when the result of the judgment in step 205 is “yes”;

in this case, the handover configuration problem may occur because the handover parameter (such as an individual cell offset, see 3GPP TS36.331) of the UE for the target cell is set too small, resulting in the UE not completing handover when the serving cell signal received by the UE is very weak;

step 207: recording the analysis result by the UE;

in this embodiment, the UE may in this case write the analysis result “handover configuration problem” in the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in the case of a downlink physical layer problem, the analysis result “handover configuration problem” can be written as follows: “handover configuration problem (physical layer problem, measurement report not triggered, there is an adjacent cell with better signal quality)” or “problem handover configuration (T310 expires, measurement report not triggered, there is an adjacent cell with better signal quality) ”, etc .;

in this case, “the measurement report is not initiated, there is an adjacent cell with the best signal quality” may be optional information and may not be recorded;

step 208: further determining by the UE whether there is a recent successful UL transmission before the communication line failure occurs when the result of the judgment in step 205 is “no” and the execution of step 209 when there is a recent successful UL transmission, otherwise step 211 occurs ;

in this embodiment, a recent successful UL transmission refers to a successful UL transmission before a downlink problem occurred (for example, parts of the N310 continuous indication out of sync from a lower level are received);

step 209: determining that the cause of the communication link failure is a “hole in the coverage area” when the result of the determination in step 208 is that there is a recent successful UL transmission;

in this embodiment, a hole in the coverage area refers to the fact that the UE cannot successfully transmit data packets in the uplink direction and / or cannot receive data packets in the downlink direction;

in this case, the hole in the coverage area is only the hole in the coverage area of the downlink, referring to the fact that the UE cannot receive data packets in the direction of the downlink;

step 210: recording the result of the analysis by the UE;

in this embodiment, the UE may record the “hole in coverage” analysis result, in this case, in the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in the case of a physical layer problem, the result of the analysis of the “hole in the coverage zone” can be written as follows: “the hole in the coverage zone” (physical layer problem, measurement report is not initiated, there is no neighboring cell with the best signal quality, there is a recent successful UL transmission ) ”; or “a hole in the coverage area (T310 expires, measurement report is not triggered, there is no neighboring cell with better signal quality, there has been a recent successful UL transmission)”, etc .;

moreover, “there is no neighboring cell with better signal quality, there has been a recent successful UL transmission” may be optional information and may not be recorded;

step 211: determining that the cause of the link failure is a “hole in the coverage area” when the result of the determination in step 208 is that there is no recent successful UL transmission;

in this embodiment, it (the result) can be defined as “a hole in the coverage area of the downlink, the uplink is unknown”;

step 212: recording the result of the analysis;

in this embodiment, the UE may in this case record the “hole in coverage” analysis result in the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in the case of a physical layer problem, the result of the “hole in the coverage zone” analysis can be written as follows: “hole in the coverage zone (physical layer problem, measurement report is not initiated, there is no neighboring cell with better signal quality, there is no recent successful UL transmission ) ”; or “a hole in the coverage area (T310 expires, measurement report is not triggered, there is no neighboring cell with better signal quality, there is no recent successful UL transmission)”, etc .;

where “a measurement report is not triggered, there is no neighboring cell with better signal quality, there is no recent successful UL transmission” may be optional information and may not be recorded;

steps 213, 214, 215 and 216: the transmission of the analysis ends by the UE for the network side;

in this embodiment, the analysis result may be included in the link failure report for transmission to the network side and may also be separately transmitted; in addition, the analysis result can be transmitted only at the request of the network side.

In the above embodiment, it should be noted that steps 204, 207, 210, and 212 are optional; furthermore, the process shown in FIG. 2 is simply an embodiment of the present invention, and for those skilled in the art, each step can be set in accordance with the actual situation only if the following is satisfied: when the measurement report is triggered, it is determined that the cause of the communication link failure is a handover configuration problem; when the measurement report is not triggered and there is an adjacent cell with the best signal quality, it is determined that the cause of the communication line failure is a handover configuration problem; when the measurement report is not triggered, there is no neighboring cell with better signal quality and there is a recent successful UL transmission before the communication failure, it is determined that the reason for the communication failure is only a hole in the downlink coverage area; and when the measurement report is not triggered, there is no neighboring cell with better signal quality and there is no recent successful UL transmission before the communication failure, it is determined that the cause of the communication failure is a hole in the downlink coverage area and the uplink is unknown.

It can be seen from the above embodiment that when the cause of the link failure is a physical layer problem, the UE can analyze the detailed reasons for the link failure in accordance with the above processes and report the analysis result to the network side. Thus, the network side can analyze the reasons for the failure of the communication line in accordance with the information transmitted in the form of a report by the UE, to more accurately perform network optimization.

FIG. 3 is a flowchart of a method for analyzing a cause of a link failure of Embodiment 3 of the present invention. This embodiment is described taking as an example the transmission problem of the uplink RLC layer. As shown in FIG. 3, the method includes:

step 301: determining by the UE that the link failure is an RLC layer transmission problem;

in this embodiment, when the UE transmits data to the base station, when the base station incorrectly receives data, the base station notifies the UE to retransmit data and the UE estimates whether the maximum number of retransmissions of the RLC layer is reached when the maximum number is reached, it can be determined that link failure is an uplink RLC layer transmission problem;

step 302: determining whether a measurement report is triggered and step 303 is executed when the report is triggered, otherwise step 307 is performed;

in this embodiment, a method for determining whether a measurement report has been triggered is as described in Embodiment 2, which will not be described further herein;

step 303: further determining by the UE whether the measurement report is transmitted successfully, when determining in step 302 that the measurement report is triggered and step 304 is executed upon successful transmission, otherwise step 311 is performed;

in this embodiment, the UE receives a confirmation message returned from the network side after transmitting the measurement report, and may determine that the measurement report has been successfully transmitted;

step 304: further determining whether a handover complete message has been successfully transmitted, determining at step 303 that the measurement report has been successfully transmitted, and step 305 is executed when the handover complete message is not successfully transmitted, otherwise returning to step 302;

in this embodiment, the handover complete message is the last message in the completed handover process that is transmitted from the UE to the target base station, such as the RRC connection reconfiguration completion message;

step 305: determining that the cause of the communication link failure is a handover configuration problem, in determining at step 304 that the handover completion message has not been successfully transmitted;

in this embodiment, a handover configuration problem may be determined since a handover complete message cannot be transmitted;

in particular, it (the problem) may be the problem of the handover parameter because the handover parameter (such as an individual cell offset, see 3GPP TS36.331) of the UE for the target cell is set too large, resulting in The UE does not complete the handover or a link failure occurs after the handover is completed when the signal of the target cell is very weak when the UE transfers service to the target cell;

step 306: recording the analysis result by the UE;

in this embodiment, the UE may then write the analysis result “handover configuration problem” to the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in case of an uplink RLC level transmission problem, the analysis result of the “handover configuration problem” can be written as follows: “handover configuration problem (uplink RLC level transmission problem, the handover complete message cannot be transmitted)”;

where “a handover completion message cannot be transmitted” may be optional information and may not be recorded;

step 307: further determining by the UE whether a neighboring cell with the best signal quality exists, determining in step 302 that the measurement report is not triggered, and step 315 is executed when the result of the determination is “yes”, otherwise step 308 is performed;

step 308: further determining by the UE whether there is a recent successful DL transmission when the result of the determination is “no” in step 307 and performing step 309 when the result of the assessment is “yes”, otherwise step 313 is performed; however, a recent successful downlink transmission refers to a successful downlink transmission before determining that the cause of the communication failure is the transmission problem of the RLC layer;

step 309: determining by the UE that the cause of the link failure is only a hole in the coverage area of the uplink when the result of the judgment in step 308 is “yes”;

step 310: recording the analysis result by the UE;

in this embodiment, the UE may record the “hole in coverage” analysis result in a link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in case of a problem of transmitting the RLC level of the uplink, the result of the analysis of the “hole in the coverage area” can be written as follows: “hole in the coverage area” (the problem of transmitting the RLC level in the uplink, the measurement report is not initiated, there is no neighboring cell with better signal quality, there is a recent successful DL transmission); however, “the measurement report is not initiated, there is no neighboring cell with the best signal quality, there is a recent successful DL transmission” may be optional information and may not be recorded;

step 311: determining by the UE that the cause of the communication link failure is a handover configuration problem when the result of the judgment in step 303 is “no”;

in this embodiment, there may be a handover parameter problem due to which the handover parameter (such as individual cell offset, see 3GPP TS36.331) of the UE for the target cell is set too small, resulting in the UE not ending handover when the serving cell signal received by the UE is very weak;

step 312: recording the analysis result by the UE;

in this embodiment, the UE may write the analysis result “handover configuration problem” in this case to the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the analysis result can be recorded separately and transmitted to the network side for use by the network side when analyzing the cause of the communication line failure or network optimization;

moreover, in the case of an uplink RLC level transmission problem, the analysis result “handover configuration problem” can be written as follows: “handover configuration problem (uplink RLC transmission problem, measurement report initiated, measurement report not transmitted successfully)”; in this case, “the measurement report is initiated, the measurement report is not transmitted successfully” may be optional information and may not be recorded;

step 313: determining by the UE that the cause of the communication failure is a hole in the coverage area of the uplink and the downlink is unknown when the result of the assessment in step 308 is “no”;

step 314: recording the result of the analysis by the UE;

in this embodiment, the UE may in this case write the “hole in coverage” analysis result to the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in case of a problem of transmitting the uplink RLC level, the result of the “hole in coverage” analysis can be written as follows: “hole in the coverage area (problem of transmitting RLC over the uplink, measurement report is not initiated, there is no neighboring cell with better quality signal, there is no recent successful downlink transmission) ”; however, “the measurement report is not initiated, there is no neighboring cell with the best signal quality, there is no recent successful downlink transmission” may be optional information and may not be recorded;

step 315: determining by the UE that the cause of the communication link failure is a handover configuration problem when the result of the judgment in step 307 is “yes”;

moreover, in particular, the handover configuration problem may be a handover parameter problem due to which the handover parameter (such as individual cell offset, see 3GPP TS36.331) of the UE for the target cell is set too small, which leads to that the UE does not end the handover when the serving cell signal received by the UE is very weak;

step 316: recording the result of the analysis by the UE;

in this embodiment, the UE may in this case write the analysis result “handover configuration problem” to the link failure report and transmit the analysis result to the network side using the link failure report; however, it is not limited to this, and the result of the analysis can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization;

moreover, in case of an uplink RLC level transmission problem, the analysis result “handover configuration problem” can be written as follows: “handover configuration problem (uplink RLC transmission problem, measurement report is not triggered, there is a neighboring cell with better quality signal) ”; in this case, “the measurement report is not initiated, there is an adjacent cell with the best signal quality” may be optional information and may not be recorded;

steps 317-321: transmitting the analysis result by the UE to the network side;

in this embodiment, the analysis result can be included in the communication failure report and the analysis result can be transmitted to the network side using the communication failure report and can also be separately transmitted; in addition, the result of the analysis can be transmitted upon request via the network side and can also be immediately transmitted after the request is received; in a particular embodiment, this may be determined in accordance with the actual situation.

In the aforementioned embodiment, it should be noted that steps 306, 310, 312, 314 and 316 are optional; furthermore, the process shown in FIG. 3 is simply an embodiment of the present invention and for those skilled in the art, each step can be set in accordance with the actual situation only if the following is satisfied: when the measurement report is initiated and the measurement report is not transmitted successfully, it is determined that the cause of the line failure Communication is a handover configuration problem; when the measurement report is initiated and the measurement report is successfully transmitted, and the handover completion message is not transmitted successfully, it is determined that the cause of the communication link failure is a handover configuration problem; when the measurement report is not triggered and there is an adjacent cell with the best signal quality, it is determined that the cause of the communication line failure is a handover configuration problem; when the measurement report is not triggered, there is no neighboring cell with the best signal quality and there is a recent successful downlink transmission before the communication failure, it is determined that the reason for the communication failure is only a hole in the uplink coverage area; and when the measurement report is not triggered, there is no neighboring cell with better signal quality and there is no recent successful DL transmission before the communication failure, it is determined that the cause of the communication failure is a hole in the uplink coverage area and the downlink is unknown.

It can be seen from the aforementioned embodiment that in the case where the cause of the link failure is an uplink RLC transmission problem, the UE can analyze the detailed reasons for the link failure in accordance with the above processes and report the analysis result to the network side. Thus, the network side can analyze the reasons for the failure of the communication line in accordance with the information transmitted in the form of a report by the UE, to perform more accurate network optimization.

Embodiment 4 of the present invention further provides a method for analyzing a cause of link failure.

In an embodiment of the present invention, when the cause of the link failure is a random access problem of the MAC layer, the UE determines that the cause of the link failure is an uplink problem related to the random access process of the MAC layer when receiving an indication of the failure of a random process of the MAC layer, from due to improper transmission power settings and improper physical random access channel (PRACH) resource configuration, etc.

In addition, the UE may record the analysis result of “MAC random access problem”. In this case, the UE may write the analysis result to the communication link failure report and transmit the analysis result to the network side using the communication link failure report; however, it is not limited to this, and the analysis result can also be recorded separately and transmitted to the network side for use by the network side in analyzing the cause of the link failure or network optimization.

As can be seen from the above embodiment, the UE can obtain information regarding the detailed causes of the link failure by analyzing the cause of the link failure and transmit the analysis result to the network side in a report. Thus, the network side can analyze the reasons for the failure of the communication line in accordance with the information transmitted in the form of a report by the UE to perform more accurate network optimization.

FIG. 4 is a flowchart of a method for analyzing a cause of a link failure of Embodiment 5 of the present invention. For the base station where the UE is located when a link failure in the UE occurs, as shown in FIG. 4, the method includes:

step 401: obtaining information regarding the cause of the failure of the communication line transmitted by the user side;

in this embodiment, the information regarding the cause of the link failure may be that described in embodiments 1-4 above;

for example, a handover configuration problem (an uplink RLC transmission problem, a handover complete message cannot be transmitted);

handover configuration problem (uplink RLC transmission problem, measurement report initiated, measurement report not transmitted successfully);

a handover configuration problem (an uplink RLC transmission problem, a measurement report has not been triggered, there is an adjacent cell with better signal quality);

a hole in the coverage area (uplink RLC transmission problem, measurement report not initiated, there is no neighboring cell with better signal quality, there has been a recent successful downlink transmission);

a hole in the coverage area (uplink RLC transmission problem, measurement report not triggered, there is no neighboring cell with better signal quality, there is no recent successful downlink transmission);

handover configuration problem (T310 expires, measurement report initiated);

handover configuration problem (T310 expires, measurement report not triggered, there is an adjacent cell with better signal quality);

a hole in the coverage area (T310 expires, measurement report is not initiated, there is no neighboring cell with the best signal quality, there is a recent successful uplink transmission);

a hole in the coverage area (T310 expires, measurement report is not triggered, there is no neighboring cell with better signal quality, there is no recent successful uplink transmission); and

MAC level random access problem;

in the above information, some part is optional, which is described in embodiments 1-4, and will not be described further in the present description;

in addition, the base station where the UE is located does not receive the above information directly, and the information can be transmitted to the base station via another base station via an air interface message or message between base stations, thereby allowing the base station to receive a link failure reason;

in this embodiment, information regarding the cause of the link failure can be transmitted using the link failure report; in addition, it may also be transmitted separately or included in another message for transmission;

step 402: determining the cause of the failure of the communication line, in accordance with the received cause of the failure of the communication line, or in accordance with the received cause of the failure of the communication line together with its own measurement result;

in this embodiment, after receiving the cause of the link failure, the base station can use the received link failure reason to determine the root cause of the link failure;

in addition, in this embodiment, in order to more accurately determine the root cause of the link failure, the base station can determine the root cause of the link failure in accordance with the received link failure reason and more accurately determine the root cause of the link failure together with its measurement result;

in this embodiment, the intrinsic measurement may be an SRS measurement, etc.

FIG. 5 is a flowchart of a network optimization method of Embodiment 6 of the present invention. For the base station where the UE is located, in the event of a link failure on the UE, as shown in FIG. 5, the method includes:

steps 501 and 502: similar to steps 401 and 402 in embodiment 5 shown in FIG. 4, which will not be described in the present description additionally;

step 503: in step 503, the base station can perform the corresponding network optimization after determining the root cause of the link failure.

The determination of the root cause of the link failure and network optimization by the base station together with its measurement result should be described below by way of examples.

Example 1: handover configuration problem

The UE transmits in the form of reports the following causes of the link failure, for example, a handover configuration problem (T310 expires, measurement report initiated), (T310 expires, measurement report not initiated), (uplink RLC transmission problem, handover complete message not can be transmitted), (uplink RLC transmission problem, measurement report cannot be transmitted successfully), etc .;

the measurement result of the base station itself: the base station can evaluate whether the handover is too early, whether the handover is too late or the service is being transferred to the wrong cell, in accordance with the UE information during the handover;

thus, after receiving the cause of the link failure transmitted as a report by the UE, the base station compares the cause with the result of its assessment, such as the transmission is too early, the transmission is too late or the service is being transferred to the wrong cell to determine the root cause of the communication failure, such Thus, a decision is made to adjust the parameter and achieve the network optimization problem.

For example, although the base station is able to determine that the cause of the link failure is that the handover is too late, if the reason reported as the UE of the base station is “handover configuration problem (T310 expires, measurement report initiated)” , the base station may determine, in accordance with the above information, which parameters should be adjusted, for example, a parameter having a measurement configuration, such as time to initiate (see TS36.331), to optimize and network by adjusting the corresponding parameter.

EXAMPLE 2: HOLE ZONE

Like the aforementioned analysis, the UE reports the following link failure reasons: hole in coverage area (T310 expires, measurement report not triggered, recent successful UL transmission), hole in coverage area (T310 expires, measurement report not triggered, does not exist recent successful UL transfer);

if the base station is able to determine that the cause of the link failure is a hole in the coverage area, when the base station receives the cause of the link failure from the UE, the base station can determine whether the hole in the coverage area is a hole in the uplink coverage area, a hole in the coverage area of the downlink, or holes in the coverage area of the uplink and downlink, in accordance with its measurement result and the analysis result transmitted in the form of a report by the UE.

The detailed process is as follows:

the base station receives the cause of the link failure, such as a hole in the coverage area of the uplink, downlink or uplink and downlink transmitted as a report by the UE, initiates these transmission procedures in the form of an MDT report for the UE near the position, where the communication line failure occurs and additionally determines the problem of the hole in the coverage area, in accordance with the MDT report; thus, the base station notifies the OAM server of a specific result to optimize network performance.

EXAMPLE 3: MAC LEVEL ARBITRARY ACCESS

when the cause of the failure of the communication line transmitted as a report by the UE is a random access problem of the MAC layer, the base station is able to initiate those transmission procedures as a random access channel (RACH) of the UE near the position where the communication failure occurs after receiving the information , thus helping to find the cause of the random access problem; in this way, the RACH can be optimized according to a specific reason for optimizing the network.

It should be noted from the above embodiment that the UE analyzes the causes of the link failure in accordance with the detailed initiation information and provides the analysis result to the network side, so that the base station determines the root cause of the link failure in accordance with the analysis result, or additionally with its result measurements after receiving the analysis result for more accurate network optimization.

One of ordinary skill in the art may understand that all or part of the steps in the method of performing the aforementioned embodiment may be performed by means of associated hardware receiving instructions through a program. The program may be stored on a computer readable storage medium. And when executed, the program may include all or part of the steps in the method in the above embodiment, and the storage medium may include ROM, RAM, a floppy disk and a CD, etc.

Embodiments of the present invention further provide an apparatus for analyzing a cause of communication failure and a network optimization apparatus as described in the embodiments below. Since the principles of devices for solving problems are similar to the aforementioned method for analyzing the causes of communication failure and a method for optimizing the network based on these devices, the implementation of the methods may relate to the implementation of the devices, and the repeating parts will not be described further.

FIG. 6 is a schematic diagram of an apparatus for analyzing a cause of a link failure of an embodiment 7 of the present invention. The device includes: a first processing unit 601, a second processing unit 602, and a first transmission unit 603; moreover,

the first processing unit 601 is configured to determine when a link failure occurs, detailed initiation information causing the link failure; in this embodiment, the processing method of the first processing unit 601 is described in step 101 in Embodiment 1, which will not be described further herein;

the second processing unit 602 is configured to analyze the cause of the link failure in accordance with the detailed initiation information causing the link failure; moreover, the processing method of the second processing unit 602 is as described in step 102 in Embodiment 1 and in Embodiments 2-4, which will not be described further herein;

the first transmission unit 603 is configured to transmit a link failure reason obtained by analysis to the network side; in this embodiment, transmitting the cause of the link failure by the first transmission unit 103 is what is described in step 103 of Embodiment 1, which will not be described further herein.

In this embodiment, the function of the second processing unit 602 should be described with respect to the detailed cause of the link failure.

In this embodiment, when the detailed cause of the link failure is a physical layer problem, the second processing unit 602 is configured to:

determining when a measurement report is triggered that the cause of the link failure is a handover configuration problem;

determining when a measurement report is not triggered and there is an adjacent cell with good signal quality that the cause of the link failure is a handover configuration problem;

determining when a measurement report is not triggered, there is no neighboring cell with good signal quality, and there is a recent successful UL transmission before the communication line failure occurs that the communication line failure is due to a hole in the coverage area on the downlink; and

determining when a measurement report is not triggered, there is no neighboring cell with good signal quality, and there is no recent successful UL transmission before the communication failure, that the communication failure is caused by a hole in the coverage area on the downlink, and the uplink communication unknown.

In this case, the processing method of the second processing unit 602 is as described in Embodiment 2, which will not be described further herein.

In this embodiment, when the detailed cause of the communication line failure is the problem of transmitting the radio link control level, the second processing unit 602 is configured to:

determining when a measurement report has been initiated and not transmitted successfully that the cause of the link failure is a handover configuration problem;

determining when a measurement report has been initiated and transmitted successfully, and the handover completion message is not transmitted successfully, that the cause of the link failure is a handover configuration problem;

determining when a measurement report is not triggered and there is an adjacent cell with good signal quality that the cause of the link failure is a handover configuration problem;

determining when a measurement report is not triggered, there is no neighboring cell with good signal quality, and there has been a recent successful downlink transmission before the communication line failure occurs that the communication line failure is due to a hole in the uplink coverage area; and

determining when a measurement report is not triggered, there is no neighboring cell with good signal quality, and there is no recent successful downlink transmission before the communication line failure, that the communication line is caused by a hole in the uplink coverage area, and the downstream communication line is unknown.

In this case, the processing method of the second processing unit 602 is as described in Embodiment 3, which will not be described further herein.

In this embodiment, when the detailed cause of the link failure is the random access problem of the medium access control layer, the second processing unit 602 is configured to:

determining, after the failure indication of the random procedure of the medium access control level, that the cause of the communication line failure is an uplink problem associated with the random procedure of the medium access control level.

In this case, the processing method of the second processing unit 602 is as described in Embodiment 4, which will not be described further herein.

In this embodiment, the device may be a UE, such as terminal equipment, for example, a PDA, a mobile terminal, and a computer, etc.

FIG. 7 is a schematic diagram of an apparatus for analyzing a cause of a link failure of an embodiment 8 of the present invention. The device includes: a third processing unit 701 and a fourth processing unit 702; moreover,

the third processing unit 701 is configured to obtain information regarding the cause of the link failure transmitted by the user side;

in this embodiment, the information regarding the cause of the link failure is as described in step 401 in embodiment 5, which will not be described further herein;

the fourth processing unit 702 is configured to determine the cause of the communication line failure in accordance with the received communication line failure reason, or in accordance with the received communication line failure reason together with the measurement result;

in this embodiment, information regarding the cause of the link failure is as described in step 402 in embodiment 5, which will not be described further herein.

In the above embodiment, the device may be the base station where the UE is located when a link failure in the UE occurs.

FIG. 8 is a schematic diagram of a network optimization apparatus of Embodiment 9 of the present invention. The device includes: a fifth processing unit 801, a sixth processing unit 802, and a first optimization unit 803; moreover,

the fifth processing unit 801 is configured to obtain a cause of a link failure transmitted by the user side;

the sixth processing unit 802 is configured to determine the cause of the communication line failure in accordance with the received communication line failure reason, or in accordance with the received communication line failure reason together with the measurement result; and

the first optimization block 803 is configured to optimize the network according to a specific cause of the link failure.

In this embodiment, the execution processes of the fifth processing unit 801 and the sixth processing unit 802 are the same as described in steps 401 and 402 in embodiment 5, and the execution process of the first optimization unit 803 is the same as described in step 503 in the Embodiment 6, and will not be described further herein.

In the above embodiment, the device may be the base station where the UE is located when a link failure in the UE occurs.

It can be seen from the above embodiment that the UE can obtain detailed information regarding the cause of the link failure by analyzing the cause of the link failure and transmit the analysis result to the network side in a report. Thus, the network side can analyze the reasons for the failure of the communication line in accordance with the information transmitted in the form of a report by the UE for more accurate network optimization.

FIG. 9 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 10 of the present invention. For the UE, as shown in FIG. 9, the method includes:

step 901: determining when a communication link failure occurs, detailed initiation information causing the communication link failure; and

step 902: transmitting detailed initiation information, as a cause of the link failure, to the network side.

In the above embodiment, the detailed initiation information is as described in Embodiment 1, and will not be described further herein.

As can be seen from the aforementioned embodiment, that when a link failure occurs, the UE provides detailed initiation information causing the link failure to the network side, so that the network side determines the cause of the link failure more precisely in accordance with the information for more accurate network optimization.

FIG. 10 is a flowchart of a method for analyzing a cause of a link failure of an embodiment 11 of the present invention. For the base station where the UE is located when link failure occurs in the UE, as shown in FIG. 10, the method includes:

step 1001: obtaining detailed initiation information causing a link failure transmitted by the user side; wherein the UE transmits the detailed initiation information to the network side as a cause of the link failure and the base station where the UE is located does not receive the above information directly, and the information can be transmitted to the base station where the UE is located via another base station via an air message an interface or messages between base stations, thereby allowing the base station to receive a link failure reason;

in this embodiment, information regarding the cause of the link failure can be transmitted using the link failure report; in addition, it may also be transmitted separately or included in another message for transmission;

step 1002: determining the cause of the failure of the communication line, in accordance with the received detailed information of the initiation, or in accordance with the received detailed information of the initiation in accordance with the measurement result.

FIG. 11 is a flowchart of a network optimization method of Embodiment 12 of the present invention. For the base station where the UE is located when a link failure occurs, as shown in FIG. 11, the method includes:

steps 1101 and 1102 are similar to steps 1001 and 1002 in embodiment 11, which will not be described further herein;

step 1103: optimizing the network in accordance with a specific root cause of the failure of the communication line.

As can be seen from the aforementioned embodiment, when the communication line failure occurs, the UE provides detailed initiation information causing the communication line failure to the network side, so that the network side determines the cause of the communication failure more precisely in accordance with the information for more accurate network optimization .

A method for analyzing the causes of link failure and a method for optimizing the network of embodiments of the present invention will be described below by way of examples.

EXAMPLE 1: THE PROBLEM OF THE PHYSICAL LEVEL

the base station may determine that the cause of the communication link failure is a handover configuration problem (for example, the handoff is too early, the handover is too late or the wrong cell is being transmitted), or a hole in the coverage area in accordance with the detailed initiation information and the measurement result;

an evaluation method can be achieved by using the prior art; for example, when the measurement result shows that there is no neighboring cell with the best signal quality, when the communication line fails, it should be estimated that this is a hole in the coverage area;

according to the evaluation result, the base station can solve the handover configuration problem by adjusting the handover parameter (such as individual cell offset, see 3GPP TS36.331) of the UE for the target cell or solve the hole problem in the coverage area by increasing the coverage of the base station.

EXAMPLE 2: THE PROBLEM OF ARBITRARY ACCESS OF THE LEVEL OF CONTROL OF ACCESS TO THE ENVIRONMENT

the base station may determine that the cause of the communication link failure is an uplink problem related to the random access process of the MAC layer in accordance with the detailed initiation information, such as improper transmission power setting and improper physical random access channel (PRACH) resource configuration;

and the base station can optimize network efficiency by increasing the transmit power or increasing the resources of the physical random access channel.

EXAMPLE 3: PROBLEM OF TRANSMISSION OF THE MANAGEMENT LEVEL BY THE RISING AROUND LINK

The base station may estimate that the uplink configuration is inappropriate in accordance with the reported reporting problem of the transmission of the uplink control level of the radio communication, such as improperly configured transmission power of the uplink;

and the base station can optimize network efficiency by adjusting the uplink transmit power of the UE.

As can be seen from the above, the above embodiments are merely illustrative embodiments of the present invention, and it is possible for those skilled in the art to develop circuits for determining the root cause of a link failure and network optimization, in accordance with embodiments of the present invention.

An embodiment of the present invention further provides an apparatus for analyzing a cause of a link failure and a network optimization apparatus as described in the embodiments below. Since the principles of the devices for solving problems are similar to the aforementioned method for analyzing the causes of the communication line failure and the network optimization method is based on these devices, the implementation of the methods may relate to the implementation of the devices, and the repeated parts will not be described further.

FIG. 12 is a schematic diagram of the structure of an apparatus for analyzing a cause of a link failure of Embodiment 13 of the present invention. The device includes: a seventh processing unit 1201 and a second transmission unit 1202; in which,

the seventh processing unit 1201 is configured to determine when a link failure occurs, detailed initiation information causing the link failure; moreover, the detailed determination process is the same as described in Embodiment 1 above, and will not be described further in the present description;

and the second transmission unit 1202 is configured to transmit detailed initiation information, as a link failure, to the network side; moreover, the detailed determination process is the same as described in Embodiment 1 above, which will not be described further in the present description.

In this embodiment, the device may be a UE, such as a PDA and a mobile terminal, etc.

FIG. 13 is a schematic diagram of a structure of an apparatus for analyzing a cause of a link failure of Embodiment 14 of the present invention. The device includes: an eighth processing unit 1301 and a ninth processing unit 1302; in which,

the eighth processing unit 1301 is configured to obtain detailed initiation information causing a link failure transmitted by the user side; moreover, the detailed method of obtaining is the same as described in Embodiment 11 above, which will not be described further in the present description;

and the ninth processing unit 1302 is configured to determine the cause of the link failure, in accordance with the received detailed initiation information, or in accordance with the received detailed initiation information together with the measurement result; moreover, the detailed determination process is the same as described in Embodiment 11 above, which will not be described further in the present description.

In the above embodiment, the device is a base station, that is, a base station where the UE is located when a link failure.

FIG. 14 is a schematic structural diagram of a network optimization apparatus of Embodiment 15 of the present invention. As shown in FIG. 14, the device includes: a tenth processing unit 1401, an eleventh processing unit 1402, and a second optimization unit 1403; in which,

the functions of the tenth processing unit 1401 and the eleventh processing unit 1402 are similar to those of the eighth processing unit 1301 and the ninth processing unit 1302 in Embodiment 14, which will not be described further herein;

and the second optimization unit 1403 is configured to optimize the network according to a specific cause of the link failure.

In this embodiment, the device may be a UE, such as a PDA and a mobile terminal, etc.

It can be seen from the above embodiment that when a link failure occurs, the UE provides detailed initiation information causing the link failure to the network side, so that the network side determines the cause of the link failure more precisely in accordance with the information for more accurate optimization network.

An embodiment of the present invention further provides a computer-readable program, the program being executed on a device for analyzing the cause of a communication failure, the program allows the computer to execute a method for analyzing the cause of a communication failure, as described in embodiments 1-5 and 10-11 in the analysis device causes of communication line failure.

An embodiment of the present invention further provides a storage medium where a computer-readable program is stored, and the computer-readable program allows the computer to execute a method for analyzing the cause of communication failure as described in embodiments 1-5 and 10-11 in the apparatus for analyzing the cause of communication failure.

An embodiment of the present invention further provides a computer readable program, and when executing the program on the network optimization device, this program allows the computer to execute the network optimization method as described in embodiments 6 and 12 in the network optimization device.

An embodiment of the present invention further provides a storage medium in which a computer-readable program is stored, the computer-readable program allowing the computer to perform a network optimization method as described in embodiments 6 and 12 in the network optimization device.

The above devices and methods of the present invention can be implemented in hardware or hardware in conjunction with software. The present invention relates to such a computer-readable program that, when the program is executed by a logical device, this logical device is allowed to execute the device or components as described above, or to execute methods or steps as described above. This invention also relates to a storage medium for storing the aforementioned program, such as to a hard disk, diskette, CD, DVD and flash memory, etc.

The invention is described above with reference to specific embodiments. However, it should be understood by those skilled in the art that such a description is illustrative only and is not intended to limit the scope of protection of the present invention. Various variations and modifications may be made by those skilled in the art in accordance with the spirit and principle of the present invention, and such variations and modifications are within the scope of the present invention.

Claims (17)

1. A communication system comprising: a first device and a second device for analyzing a cause of a radio link failure, wherein the first device includes a processing unit configured to determine, when a radio link failure occurs, detailed initiation information causing the radio link failure, wherein the detailed initiation information includes a physical layer problem, a random access problem of the medium access control layer and the problem of transmitting a radio link control layer, and a transmission unit configured to transmit detailed initiation information as the cause of the failure of the radio link to the second device, and the second device includes a first processing unit configured to receive detailed initiation information transmitted by the first device, and a second processing unit configured to determine the cause of the failure of the radio link according to the received detailed initiation information or according to the received detailed initiation information in ns with the result of the measurement, so that to make a decision on how to adjust a parameter related to the handover, according to details of initiation. 2. The system of claim 1, wherein the physical layer problem includes a case where the radio link does not get better for some time; wherein the random access problem of the medium access control layer includes a case where the random access procedure is not successful; and the problem of transmitting a radio link control level includes a case where the number of retransmissions at the radio link control level reaches a maximum value. 3. The system of claim 1, wherein the cause of the radio link failure includes one or more parts of the following information: the problem of the handover configuration, the hole in the downlink and / or uplink coverage, and the problem of the uplink communication line communication. 4. The system of claim 1, wherein when the detailed initiation information causing the failure of the radio link is a physical layer problem, the second processing unit is further configured to: determining when a measurement report was initiated that the cause of the radio link failure is a handover configuration problem; determining when a measurement report has not been initiated and there are neighboring cells with good signal quality that the cause of the radio link failure is a handover configuration problem; and determining when a measurement report has not been initiated and there is no neighboring cell with good signal quality that the cause of the radio link failure is a hole in the coating. 5. The system of claim 4, wherein when the measurement report has not been initiated and there is no neighboring cell with good signal quality, it is determined that the cause of the radio link failure is a hole in the downlink coverage when there is a recent successful uplink transmission to failure of the radio link; and it is determined that the cause of the radio link failure is a hole in the downlink coverage and the uplink is unknown when there is no recent successful transmission of the uplink before the radio link failure. 6. The system of claim 1, wherein when the detailed initiation information causing the failure of the radio link is a random access problem of the medium access control layer, the second processing unit is further configured to: determining, after receiving an indication of a failure of an arbitrary procedure for the medium access control layer, that the cause of the radio link failure is an uplink problem associated with an arbitrary procedure for the medium access control layer. 7. The system of claim 1, wherein when the detailed initiation information causing the failure of the radio link is a problem of transmitting a control layer of the radio link, the second processing unit is further configured to: determining when a measurement report has been initiated and not transmitted successfully, that the cause of the radio link failure is a handover configuration problem; determining when the measurement report is successfully initiated and transmitted, and the handover completion message is not transmitted successfully, that the cause of the radio link failure is a handover configuration problem; determining when a measurement report has not been initiated and there are neighboring cells with good signal quality that the cause of the radio link failure is a handover configuration problem; determining when a measurement report has not been triggered, there is no neighboring cell with good signal quality, and there is a recent successful downlink transmission before the radio link failure, which causes the radio link failure to be a hole in the uplink coverage; and determining when a measurement report has not been triggered, there is no neighboring cell with good signal quality, and there is no recent successful downlink transmission until the radio link fails, that the cause of the radio link failure is a hole in the uplink cover and the downlink is unknown.

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