CN104754616A

CN104754616A - Method, device and system for processing unnecessary switching

Info

Publication number: CN104754616A
Application number: CN201310749720.3A
Authority: CN
Inventors: 孙杨
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-12-30
Filing date: 2013-12-30
Publication date: 2015-07-01
Also published as: MY184779A; JP2017502603A; JP6289644B2; WO2015101013A1

Abstract

The invention relates to the processing of unnecessary switching in wireless communications. The invention discloses a method for processing unnecessary switching. The method comprises the steps of recognizing the fault types of unnecessary switching, counting the times of various occurring fault types of unnecessary switching, and when the times of one occurring fault type of unnecessary switching reach a set threshold, sending out a request message for adjusting corresponding parameters. The invention also discloses a device and a system for processing the unnecessary switching.

Description

Unnecessary switching processing method, device and system

Technical Field

The present invention relates to unnecessary handover of a mobile communication system, and in particular, to a method, an apparatus, and a system for processing unnecessary handover of a UE (user equipment) between an LTE (Long Term Evolution) network and an inter-system network.

Background

In 3GPP (3 rd Generation partnership Project) LTE Project, in order to reduce manpower cost for configuring and managing eNodeB (evolved Node B) as much as possible, 3GPP proposes SON (Self-Organizing network), introduces an automatic mechanism to configure and manage eNodeB, and reduces human participation, thereby reducing cost.

Mobile robustness optimization is an important function of SON. The mobile robustness optimization changes the handover condition by optimizing handover parameters, reduces handover failures and unnecessary handovers in the network.

Under the condition that the coverage and the signal quality of the LTE network are both normal, the UE is handed over from E-UTRAN (evolved UTRAN) to the inter-system network, for example: UTRAN (UMTS terrestrial radio Access Network ), GERAN (GSM EDGE radio Access Network, GSM EDGE radio Access Network), etc., which is considered as an unnecessary handover from LTE to a different system, resulting in a decrease in Network utilization efficiency and a decrease in user Network experience. In the prior art, no better scheme for identifying and optimally solving the unnecessary switching fault of the different systems exists.

Disclosure of Invention

In view of the above-mentioned drawbacks in the background art, the present invention provides a method, an apparatus, and a system for processing an unnecessary handover between different systems.

In order to solve the above problem, the processing method of unnecessary handover provided by the present invention includes: identifying a type of fault for which a handover is unnecessary; counting the occurrence times of various unnecessary switching fault types; and when the occurrence frequency of an unnecessary switching fault type reaches a set threshold, sending a request message for adjusting corresponding parameters.

Preferably, before the identifying and counting the fault types of unnecessary switching, the method further includes: a step of receiving a handover report message sent by a handover target cell, wherein the handover report message comprises a handover report type, a handover type and a candidate E-UTRAN cell list, and the candidate E-UTRAN cell list comprises the identification of the cells covered at the UE measurement position.

Preferably, the identifying the type of the unnecessary switching fault includes: and determining the fault type of unnecessary switching according to the obtained candidate neighbor list.

Preferably, the determining the type of the unnecessary handover failure according to the obtained candidate neighbor list includes:

when the candidate E-UTRAN cell only comprises a switching source cell, determining that the unnecessary switching fault type of the different system is that the switching time of the adjacent cell of the different system is too early;

when the candidate E-UTRAN cell does not comprise a handover source cell but comprises other E-UTRAN cells, and one of the other E-UTRAN cells and the handover source cell have a neighboring cell relation, determining that the unnecessary handover of the different system is too late when the handover of the neighboring cell of the same system is performed;

when the candidate E-UTRAN cell simultaneously comprises a handover source cell and other E-UTRAN cells, and the other E-UTRAN cells and the handover source cell have adjacent cell relations, determining that the unnecessary handover fault types of the different system are that the handover time to the adjacent cell of the different system is too early and the handover time to the adjacent cell of the same system is too late.

Preferably, when the number of times of occurrence of an unnecessary switching fault type reaches a set threshold, the sending of the message requesting adjustment of the corresponding parameter includes:

when the frequency of the premature occurrence of the switching time to the adjacent cell of the different system reaches a set threshold, sending a request for reducing the frequency offset Ofn of the adjacent cell of the different system;

and when the time of switching the adjacent cells of the different system later reaches a set threshold, sending a request for increasing the specific offset Ocn of the adjacent cells of the same system.

Preferably, the unnecessary handover processing method further includes: and after receiving the message that the parameter adjustment is successful, setting the statistical times of the unnecessary switching fault types to zero.

The present invention also provides an unnecessary handover processing apparatus, including: the device comprises an identification module, a statistic module and a sending module; the identification module is used for identifying the fault type of unnecessary switching and informing the statistical module; the statistical module is used for counting the times of various unnecessary switching fault types and informing the sending module when the times of the same unnecessary switching fault type reaches a set threshold; and the sending module is used for sending a corresponding request message according to the unnecessary switching fault type reaching the set threshold.

Preferably, the processing apparatus for unnecessary handover further comprises a receiving module, where the receiving module is configured to receive a handover report message sent by a handover target cell and notify the identifying module; and the parameter adjusting module is used for receiving the parameter adjusting success message and informing the statistical module.

Preferably, the identifying module determines the type of the unnecessary handover failure according to whether the obtained candidate neighbor cell list includes the source handover cell.

Preferably, the determining the unnecessary handover failure type according to whether the obtained candidate neighbor cell list includes the source handover cell includes:

Preferably, the sending module is specifically configured to:

Preferably, the statistical module is further configured to set the corresponding statistical number to zero according to the received parameter adjustment success message.

The unnecessary switching processing system provided by the invention comprises a source cell base station, a target cell base station and UE; wherein the source cell and the target cell are different network cells;

the target cell base station is used for informing the UE to perform coverage measurement after the UE is switched and accessed, and determining a switching report message according to a measurement result reported by the UE and sending the switching report message to the source cell base station;

the UE is used for measuring coverage and reporting a measurement result to a target cell base station;

the source cell base station is used for identifying the fault type of unnecessary switching according to the switching report message; counting the occurrence times of various unnecessary switching fault types; and when the occurrence frequency of an unnecessary switching fault type reaches a set threshold, sending a message for requesting to adjust the corresponding parameter.

By utilizing the processing method, the device or the system for unnecessary switching, which is provided by the invention, unnecessary switching scenes of different systems can be accurately identified and split, and different optimization schemes are implemented according to different scenes, so that unnecessary switching faults of different systems can be more accurately and directly solved, users are preferentially kept in an LTE network under the condition that network coverage and signal quality are normal, and are not switched into a 2G or 3G network, the resident network quality of the users is ensured, and the internet surfing experience of the users is improved.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, but not by way of limitation, various embodiments discussed herein.

FIG. 1 is a flow chart illustrating the basic steps of the method for handling unnecessary handover according to the present invention;

FIG. 2 is a flow chart of identifying the type of fault for unnecessary handover;

FIG. 3a is a schematic view of a first embodiment of the present invention;

FIG. 3b is a flow chart of the first embodiment of the present invention;

FIG. 4a is a schematic view of a second embodiment of the present invention;

FIG. 4b is a flow chart of a second embodiment of the present invention;

FIG. 5a is a schematic view of a third embodiment of the present invention;

FIG. 5b is a flow chart of a third embodiment of the present invention;

FIG. 6 is a schematic diagram of a processing device for unnecessary handover according to the present invention;

FIG. 7 is a diagram of a system for processing unnecessary handover according to the present invention.

Detailed Description

Fig. 1 is a basic procedure of the unnecessary handover processing method of the present invention, as shown in the figure, including:

step 101: identifying a type of fault for which a handover is unnecessary;

step 102: counting the occurrence times of various unnecessary switching fault types;

step 103: and when the occurrence frequency of an unnecessary switching fault type reaches a set threshold, sending a request message for adjusting corresponding parameters.

The fault types of unnecessary switching may include: the switching time to the adjacent cell of the different system is too early, the switching time to the adjacent cell of the same system is too late, or the switching time to the adjacent cell of the different system is too early and the switching time to the adjacent cell of the same system is too late; specifically, the failure Type of unnecessary handover may be determined according to a handover Report (HO Report) message including a handover Report Type (HO Report Type), a handover Type (HO Type), and a candidate E-UTRAN cell list. The set threshold can be comprehensively determined according to the user requirements, the switching times in the current network and the unnecessary switching occurrence frequency of the different systems.

Taking an LTE communication system as an example, a specific implementation method for identifying the type of the unnecessary handover failure in step 101 is described below, as shown in fig. 2, the method includes:

step 201: after the UE is switched from an LTE network cell A to an inter-system neighbor cell B, an eNodeB where the cell B is located informs the UE to perform coverage measurement;

the coverage measurement comprises at least measuring a cell having coverage at a current location;

step 202: UE measures coverage and reports the measurement result to eNodeB of cell B;

the measurement results comprise at least a candidate E-UTRAN cell list written with identities of E-UTRAN cells having coverage at the current location.

Step 203: the eNodeB of the cell B determines a switching report message according to the measurement result and sends the switching report message to the eNodeB of the cell A;

wherein the handover report message includes: a handover report type, a handover type, and a candidate E-UTRAN cell list; the handover report message may be carried in an MME Direct Information Transfer (MME Direct Transfer message) and sent to the eNodeB where the cell a is located.

The switching report type can be used for indicating whether the switching is unnecessary switching of the different systems; the switching type can be used for indicating that the switching is from the LTE network to which different system adjacent cell; the specific content thereof is specified in the 3GPP protocol, and is not described in detail.

Step 204: the eNodeB of the cell A judges whether the inter-system unnecessary handover exists according to the handover report message, and if the inter-system unnecessary handover exists, the specific type of the inter-system handover is further determined, for example: the inter-system cell is UTRAN, GERAN, etc., and jumps to step 205; if not, ending the current flow;

specifically, it can be determined whether the inter-system unnecessary handover is due according to the handover report type in the handover report message, and the specific type of the current handover is distinguished according to the handover type, and is respectively subjected to statistical processing. For example: when the handover report type is Uncecececessary HO to other RAT (inter-system Unnecessary handover), distinguishing whether the specific type of the handover is LTE to UTRAN (LTE to UTRAN) or LTE to GERAN (LTE to GERAN) according to the handover type, and then respectively carrying out statistical processing.

Step 205: the eNodeB of the cell A judges the unnecessary switching fault type of the different systems according to the candidate E-UTRAN cell list; specifically, the method comprises the following steps:

if the candidate E-UTRAN cell only comprises the handover source cell, the E-UTRAN handover source cell can still be detected after the inter-system handover occurs, and the UE also needs to stay in the LTE network at the moment without early handover to the inter-system network. Therefore, in this case, the failure type of unnecessary switching is determined to be that the switching time to the different-system neighboring cell is too early, and is recorded as that the switching time to the different-system neighboring cell is too early;

if the candidate E-UTRAN cell does not comprise the handover source cell but comprises other E-UTRAN cells, and one of the other E-UTRAN cells and the handover source cell have a neighboring cell relation, the situation that the E-UTRAN handover source cell cannot be detected after the inter-system handover does not exist, and the situation that the handover to the inter-system neighboring cell is too early; and the neighbor cell of the E-UTRAN handover source cell can be detected, which shows that the E-UTRAN handover source cell at the handover point has an available E-UTRAN neighbor cell but does not perform handover. Therefore, the situation determines that the unnecessary switching fault type is that the switching time of the adjacent cell of the same system is too late, and the switching time of the adjacent cell of the E-UTRAN is recorded as too late;

if the candidate E-UTRAN cell simultaneously comprises an E-UTRAN switching source cell and other E-UTRAN cells, and one of the other E-UTRAN cells and the switching source cell have a neighboring cell relation, according to the analysis, the failure types of unnecessary switching under the condition are determined to be that the switching time to the neighboring cell of the different system is too early and the switching time to the neighboring cell of the same system is too late, and the switching time to the neighboring cell of the different system is too early and the switching time to the neighboring cell of the E-UTRAN is too late respectively.

In addition, if the candidate E-UTRAN cell comprises the E-UTRAN cell but has no adjacent cell relation with the handover source cell, the E-UTRAN adjacent cell relation is subjected to the missing distribution processing according to the prior art, and the method is not involved in the invention.

In step 103, when the number of times of occurrence of an unnecessary switching fault type reaches a set threshold, a request message is sent to request adjustment of a corresponding parameter. The specific implementation mode and principle are as follows:

for unnecessary handover of the inter-system caused by early handover opportunity to the neighboring cell of the inter-system, taking the LTE communication system as an example, according to an entry condition formula of a B2 event:

Mn+Ofn-Hys>Thresh2

wherein: mn is a measurement result of an inter-system adjacent cell;

ofn is the frequency deviation of the adjacent cell of the different system;

hys is an event lag parameter;

thresh2 is the event threshold;

the above parameters may be that Mn may be obtained from a measurement report, and Ofn, Hys, Thresh2 may all be configured through a background network manager, which belongs to the prior art in the field and is not described any further.

And when the condition formula is satisfied, the UE is switched to the adjacent cell of the different system. In order to make the handover of the user to the inter-system neighbor cell more difficult, parameters need to be adjusted to make the event threshold Thresh2 more difficult to reach. Specifically, in the embodiment of the present invention, when the number of times of the occurrence of the switching timing of the inter-system neighboring cell in a too early state reaches the set threshold, the base station sends a request for reducing the frequency offset Ofn of the inter-system neighboring cell to the background network manager, and the background network manager reduces the Ofn after receiving the request, so as to achieve the purpose of adjusting the switching threshold of the inter-system neighboring cell at different frequency points, thereby optimizing the inter-system unnecessary switching problem of the type. In addition, the background network manager reduces Ofn and then sends a message of successful parameter adjustment to the base station, and the base station sets the number of times of premature switching to the adjacent cells of the different system to zero after receiving the message of successful parameter adjustment.

For unnecessary handover of an inter-system caused by too late handover of the neighboring cell to the same system, taking an LTE communication system as an example, according to an entry condition formula of an a3 event:

Mn+Ofn+Ocn-Hys>Mp+Ofp+Ocp+Off

wherein: measuring results of Mn neighbor cells;

frequency offset of the Ofn neighbor cell;

a specific offset of an Ocn neighborhood;

measurement results of Mp serving cells;

ofp frequency shift of the dominant frequency;

ocp serving cell offset;

a Hys event hysteresis parameter;

an Off event offset parameter;

thresh2 event threshold;

the above parameters may be that Mn and Mp may be obtained from a measurement report, and Ofn, Ocn, Ocp, Hys, Off, Thresh2 may all be configured through a background network manager, which belongs to the prior art in the field and is not described any further.

And when the condition formula is satisfied, the UE can be switched to the adjacent cell of the same system. In order to make it easier for the user to handover to the E-UTRAN neighbor cell, parameters need to be adjusted to make the formula easier to satisfy. Specifically, in the embodiment of the invention, when the time of switching the adjacent cells of the same system is too late to reach the set threshold, the base station sends a request for increasing the specific offset Ocn of the adjacent cells of E-UTRAN to the background network manager, and the background network manager receives the request and then increases the specific offset Ocn of the adjacent cells, so as to achieve the purpose of respectively adjusting the switching threshold of the single adjacent cells of E-UTRAN, thereby optimizing the unnecessary switching problem of the different systems of the type. In addition, after the background network manager adjusts the specific offset Ocn of the adjacent cell, a message of successful parameter adjustment is sent to the base station, and after the base station receives the message of successful parameter adjustment, the number of times of premature switching to the adjacent cell of the different system is set to zero.

For the condition that the switching time to the adjacent cell of the different system is too early and the switching time to the adjacent cell of the same system is too late, the frequency offset Ofn of the adjacent cell of the different system and the specific offset Ocn of the adjacent cell of the E-UTRAN can be simultaneously adjusted to be smaller and larger in the mode, so that the purpose of adjusting the switching threshold of the adjacent cell of the different system and the adjacent cell of the E-UTRAN is achieved, and a user can be more easily switched to the adjacent cell of the E-UTRAN and is more difficult to switch to the different system. Thereby optimizing this type of inter-system unnecessary handover problem. In the embodiment of the invention, the unnecessary switching fault types of the early switching time to the adjacent cell of the different system and the too late switching time to the adjacent cell of the same system are respectively counted as the early switching time to the adjacent cell of the different system and the too late switching time to the adjacent cell of the E-UTRAN; namely: when the switching time to the adjacent cell of the different system is too early and the switching time to the adjacent cell of the same system is too late, the counting times of the switching time to the adjacent cell of the different system is respectively added with 1, and the counting times are not independently used as a counting type to be processed.

In order to make the technical solution of the present invention easier to understand, specific examples are given below and further explained with reference to the accompanying drawings.

The first embodiment is as follows:

the scenario given in this embodiment is handover of UE from an LTE network E-UTRAN cell to an inter-system GERAN cell, and the unnecessary handover failure type of the inter-system is that the handover opportunity to the inter-system cell is too early.

As shown in fig. 3a, the UE moves from the cell a along the arrow direction, and when reaching a handover point (hotrigging), is handed over to the inter-system neighboring cell B; wherein cell a is an E-UTRAN cell and cell B is a heterogeneous system cell (Other RAT), in particular a GERAN cell. As shown in fig. 3b, the method for optimizing unnecessary handover in this embodiment includes:

step 301: after the UE is switched from the LTE cell A to the inter-system neighbor cell B, the eNodeB where the cell B is located informs the UE to perform coverage measurement;

step 302: UE measures coverage and reports the measurement result to eNodeB of cell B;

specifically, the UE measures that there is coverage of the cell a at the current location, writes the identifier of the cell a into the candidate E-UTRAN cell list, and reports the identifier to the eNodeB where the cell B is located.

Step 303: the eNodeB of the cell B determines a switching report message according to the measurement result and sends the switching report message to the eNodeB of the cell A;

wherein the handover report message includes: a handover report type, a handover type, and a candidate E-UTRAN cell list; the handover report message is carried in the MME Direct Information Transfer and sent to the eNodeB where the cell a is located.

Step 304: the eNodeB of the cell A judges that the switching is unnecessary switching from the service cell to the inter-system GERAN cell according to the switching report message;

specifically, the eNodeB in which the cell a is located determines that the handover is an Unnecessary handover of the different system according to the handover report type in the handover report message being an unncessary HO to antenna RAT; the LTE to GERAN determination is an unnecessary handover to a foreign system GERAN cell based on the handover type being LTE to GERAN.

Step 305: the eNodeB of the cell A judges the unnecessary switching fault type of the heterogeneous system according to the candidate E-UTRAN cell list; specifically, according to the fact that the candidate E-UTRAN cell only comprises a handover source cell, determining that the unnecessary handover to the inter-system fault type is that the handover time to the inter-system neighbor cell is too early, and recording that the handover time to the GERAN neighbor cell is too early;

step 306: counting the times of too early occurrence of the switching time of the GERAN adjacent cell by the eNodeB of the cell A and judging whether the switching time reaches a set threshold, if so, skipping to 307, otherwise, ending the current process;

step 307: an eNodeB in which a cell A is located sends a request for reducing the frequency offset Ofn of a GERAN adjacent cell to a background network manager;

step 308: after receiving the message of successful parameter adjustment sent by the background network manager, the eNodeB of the cell A resets the number of times of too early switching to the GERAN neighbor cell to zero so as to start the next round of statistics.

Example two:

the scenario given in this embodiment is handover of a UE from an LTE network E-UTRAN cell to a different system UTRAN cell, and the unnecessary handover failure type of the different system is too late handover timing of the same system cell.

As shown in fig. 4a, the UE moves from the cell a along the arrow direction, and when reaching a handover point (hotrigging), is handed over to the inter-system neighboring cell B; where cell a is an E-UTRAN cell and cell B is a UTRAN cell. As shown in fig. 4b, the method for optimizing unnecessary handover in this embodiment includes:

step 401: after the UE is switched from the cell A to the inter-system neighbor cell B, the eNodeB where the cell B is located informs the UE to perform coverage measurement;

step 402: UE measures coverage and reports the measurement result to eNodeB of cell B;

specifically, the UE measures that the current position is covered by a cell C, writes the identifier of the cell C into a candidate E-UTRAN cell list and reports the list to a cell B, wherein the cell C is an E-UTRAN cell.

Step 403: the eNodeB of the cell B determines the switching report information according to the measurement result and sends the switching report information to the eNodeB of the cell A;

wherein the handover report message includes: a handover report type, a handover type, and a candidate E-UTRAN cell list; the handover report message may be carried in MME Direct Information Transfer and sent to the eNodeB where the cell a is located.

Step 404: the eNodeB of the cell A judges that the handover is unnecessary handover from the serving cell to the different system cell UTRAN according to the handover report message;

step 405: the eNodeB of the cell A judges the unnecessary switching fault type of the heterogeneous system according to the candidate E-UTRAN cell list;

specifically, according to the fact that the candidate E-UTRAN cell only comprises an E-UTRAN adjacent cell C, and the cell C and a handover source cell A have an adjacent cell relation, determining that the unnecessary handover failure type of the heterogeneous system is too late when the handover of the same system adjacent cell is performed, and recording that the handover of the E-UTRAN adjacent cell is too late;

step 406: counting the too late occurrence times of the handover time of the E-UTRAN neighboring cell by the eNodeB of the cell A and judging whether the handover time reaches a set threshold, if so, jumping to a step 407, otherwise, ending the current flow;

step 407: an eNodeB where a cell A is located sends a request for increasing the specific offset Ocn of an E-UTRAN neighboring cell to a background network manager;

step 408: after receiving the message of successful parameter adjustment sent by the background network manager, the eNodeB of the cell A sets the number of times of switching to the E-UTRAN neighboring cell too late to start the next round of statistics.

Example three:

the scenario given in this embodiment is that the UE performs unnecessary handover from the E-UTRAN cell to the inter-system UTRAN cell, and the types of the unnecessary handover failures are that the handover timing to the inter-system neighboring cell is too early and the handover timing to the inter-system neighboring cell is too late.

Fig. 5a is a schematic diagram showing that a handover timing to an inter-system neighboring cell is too early and a handover timing to an inter-system neighboring cell is too late, as shown in fig. 5a, a UE moves from an LTE system cell a along an arrow direction, and when a handover point HO trigger is reached, a handover is performed to an inter-system neighboring cell B; where cell a is an E-UTRAN cell and cell B is a UTRAN cell. As shown in fig. 5b, the method for optimizing unnecessary handover in this embodiment includes:

step 501: after the UE is switched from the LTE cell A to the cell B adjacent to the different system, the eNodeB where the cell B is located informs the UE to carry out coverage measurement;

step 502: UE measures coverage and reports the measurement result to eNodeB of cell B;

specifically, the UE measures that the current position is covered by a cell A and a cell C, the identifications of the cell A and the cell C are written into a candidate E-UTRAN cell list and reported to a cell B, wherein the cell C is an E-UTRAN cell.

Step 503: the eNodeB of the cell B determines the switching report information according to the measurement result and sends the switching report information to the eNodeB of the cell A;

wherein the handover report message includes: the handover report message may be carried in MME Direct Information Transfer and sent to the eNodeB where cell a is located.

Step 504: the eNodeB of the cell A judges that the handover is unnecessary handover from the serving cell to the different system UTRAN cell according to the handover report message;

step 505: the eNodeB of the cell A determines the unnecessary switching fault type of the heterogeneous system according to the candidate E-UTRAN cell list;

specifically, according to the fact that the candidate E-UTRAN cell simultaneously comprises an E-UTRAN cell C and a handover source cell A, and the cell C and the cell A have a neighbor cell relation, the fault types of the unnecessary handover of the heterogeneous system are determined to be that the handover time to the neighbor cell of the heterogeneous system is too early and the handover time to the neighbor cell of the same system is too late, and the fault types are respectively recorded as the too early handover time to the neighbor cell of the heterogeneous UTRAN and the too late handover time to the neighbor cell of the E-UTRAN.

Step 506: the eNodeB of the cell A counts the times that the switching time of the heterogeneous UTRAN adjacent cell is too early and the switching time of the E-UTRAN adjacent cell is too late, judges whether the set threshold is reached and carries out corresponding processing according to the judgment result; specifically, the method comprises the following steps:

when the number of times of the too early switching of the adjacent cell of the UTRAN in the different system reaches a set threshold, an eNodeB in which a cell A is positioned sends a request for reducing the frequency offset Ofn of the adjacent cell of the UTRAN in the different system to a background network manager, so that the UE is more difficult to switch to the GERAN in the adjacent cell of the different system, and after receiving a message that the parameter adjustment sent by the background network manager is successful, the number of times of the too early switching of the adjacent cell of the UTRAN in the different system is set to zero to start the next round of statistics;

when the late time of switching the E-UTRAN adjacent cell reaches the set threshold, the eNodeB of the cell A sends a request for increasing the specific offset Ocn of the E-UTRAN adjacent cell to a background network manager, so that the UE can be switched to the E-UTRAN adjacent cell more easily, and after receiving a message that the parameter adjustment is successful sent by the background network manager, the late time of switching the E-UTRAN adjacent cell is set to zero to start the next round of statistics;

and when the times of the too early time of switching to the different system UTRAN neighboring cell and the too late time of switching to the E-UTRAN neighboring cell do not reach the set threshold, ending the current flow.

Fig. 6 is a schematic diagram of an unnecessary handover optimization apparatus provided by the present invention, as shown in fig. 6, the apparatus includes: the device comprises an identification module, a statistic module and a sending module. The identification module is used for identifying the fault type of unnecessary switching and informing the statistical module; the statistical module is used for counting the times of various unnecessary switching fault types, and informing the sending module when the times of the same unnecessary switching fault types of the same-type and different-type system cells reach a set threshold; and the sending module is used for sending a corresponding request message according to the unnecessary switching fault type reaching the set threshold.

As shown in fig. 6, the apparatus may further include a receiving module, configured to receive a handover report message sent by the handover target cell and notify the identifying module; and the parameter adjusting module is used for receiving a parameter adjusting success message sent by the background network manager and informing the statistical module.

The statistic module is further used for setting the corresponding statistic times to zero according to the received parameter adjustment success message.

Wherein the handover report message includes: a handover report type, a handover type, and a candidate E-UTRAN cell list; wherein the candidate E-UTRAN cell list indicates the E-UTRAN cells covered by the UE measurement position;

the identification module judges whether the different system is unnecessary to switch according to the switching report type in the switching report message; and distinguishing the specific type of the handover according to the handover type, and determining the fault type of unnecessary handover according to the candidate E-UTRAN cell list. The method specifically comprises the following steps:

A sending module, configured to send a corresponding request message according to the type of the unnecessary handover failure that reaches the set threshold, specifically:

when the number of times of premature occurrence of the switching time to the different system neighbor cell reaches a set threshold, sending a request for reducing the frequency offset Ofn of the different system neighbor cell to a gateway background;

and when the time of switching the adjacent cells of the same system later reaches a set threshold, sending a request for increasing the specific offset Ocn of the adjacent cells of the same system to a gateway background.

Fig. 7 is a schematic diagram of an unnecessary handover processing system according to the present invention, which includes a source cell base station, a target cell base station, and a UE. Wherein the source cell is an LTE network cell; the target Cell is an inter-RAT Cell (inter-RAT Cell), for example: may be a UTRAN cell or a GERAN cell, etc. The source cell and the target cell have a neighbor relation. The system processes the concrete implementation mode of unnecessary switching as follows:

step 701: after the UE is switched from the source cell to the target cell, the target cell base station informs the UE to carry out coverage measurement;

step 702: UE carries out measurement coverage and reports the measurement result to a target cell base station;

Step 703: the target cell base station determines a switching report message according to the measurement result and sends the switching report message to the source cell base station;

wherein the handover report message includes: a handover report type, a handover type, and a candidate E-UTRAN cell list; the handover report message may be carried in an MME Direct Information Transfer (MME Direct Transfer message) and sent to the source cell base station.

Step 704: the source cell base station judges whether the different system is unnecessary to be switched according to the switching report message, if so, further determines the specific type of the different system switching, for example: the inter-system cell is UTRAN, GERAN, etc. and jumps to step 705; if not, ending the current flow;

specifically, it can be determined whether the inter-system unnecessary handover is due according to the handover report type in the handover report message, and the specific type of the current handover is distinguished according to the handover type, and is respectively subjected to statistical processing.

Step 705: the source cell base station judges the unnecessary switching fault type of the different systems according to the candidate E-UTRAN cell list; specifically, the method comprises the following steps:

if the candidate E-UTRAN cell only comprises a switching source cell, determining that the unnecessary switching fault type is that the switching time to the different system adjacent cell is too early, and recording that the switching time to the different system adjacent cell is too early;

if the candidate E-UTRAN cell does not comprise the switching source cell but comprises other E-UTRAN cells, and one of the other E-UTRAN cells and the switching source cell have a neighboring cell relation, determining that the unnecessary switching fault type is too late when the switching time of the neighboring cell of the same system is reached and recording as too late when the switching time of the neighboring cell of the E-UTRAN is reached;

if the candidate E-UTRAN cell simultaneously comprises an E-UTRAN switching source cell and other E-UTRAN cells, and one of the other E-UTRAN cells and the switching source cell have a neighbor cell relation, determining that the unnecessary switching fault types are that the switching time to the neighbor cell of the different system is too early and the switching time to the neighbor cell of the same system is too late, and respectively recording that the switching time to the neighbor cell of the different system is too early and the switching time to the neighbor cell of the E-UTRAN is too late.

Step 706: the source cell base station judges and counts and judges whether the times of too early switching time of the adjacent cells of the different system and too late switching time of the adjacent cells of the same system reach a set threshold or not, and carries out corresponding processing according to the judgment result; specifically, the method comprises the following steps:

when the number of times of the too early switching time of the adjacent cell of the UTRAN in the different system reaches the set threshold, the base station of the source cell sends a request for reducing the frequency offset Ofn of the adjacent cell of the UTRAN in the different system to a background network manager, so that the UE is more difficult to switch to the GERAN in the adjacent cell of the different system, and the number of times of the too early switching time of the adjacent cell of the UTRAN in the different system is set to zero after receiving a message that the parameter adjustment sent by the background network manager is successful;

when the too late time of the switching time of the E-UTRAN adjacent cell reaches the set threshold, the source cell base station sends a request for increasing the specific offset Ocn of the E-UTRAN adjacent cell to a background network manager, so that the UE is switched to the E-UTRAN adjacent cell more easily, and the too late time of the switching time of the E-UTRAN adjacent cell is set to zero after receiving a message that the parameter adjustment sent by the background network manager is successful;

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. An unnecessary handover processing method, comprising:

identifying a type of fault for which a handover is unnecessary; counting the occurrence times of various unnecessary switching fault types; and when the occurrence frequency of an unnecessary switching fault type reaches a set threshold, sending a request message for adjusting corresponding parameters.

2. The method of claim 1, wherein prior to said identifying and counting failure types for unnecessary handovers, the method further comprises:

receiving a handover report message sent by a handover target cell, wherein the handover report message comprises: a handover report type, a handover type, and a candidate E-UTRAN cell list containing an identification of cells covered at a UE measurement location.

3. The method of claim 2, wherein the identifying the type of fault that the unnecessary handover is not necessary comprises: and determining the fault type of unnecessary switching according to the obtained candidate neighbor list.

4. The method according to claim 3, wherein the determining the type of unnecessary handover failure according to the obtained candidate neighbor list comprises:

when the candidate E-UTRAN cell does not comprise a handover source cell but comprises other E-UTRAN cells except the handover source cell, and one of the other E-UTRAN cells has a neighboring cell relation with the handover source cell, determining that the unnecessary handover failure type of the different system is too late when the handover of the neighboring cell of the same system is performed;

and when the candidate E-UTRAN cell simultaneously comprises a handover source cell and other E-UTRAN cells except the handover source cell, and the other E-UTRAN cells and the handover source cell have adjacent cell relations, determining that the unnecessary handover of the different system has the fault types of the early handover time to the adjacent cell of the different system and the late handover time to the adjacent cell of the same system.

5. The method according to any one of claims 1 to 4, wherein when the number of occurrences of an unnecessary switching fault type reaches a set threshold, sending a message requesting adjustment of a corresponding parameter comprises:

6. The method of claim 5, further comprising: and after receiving the message that the parameter adjustment is successful, setting the statistical times of the unnecessary switching fault types to zero.

7. An unnecessary handover processing apparatus, comprising: the device comprises an identification module, a statistic module and a sending module; wherein,

the identification module is used for identifying the fault type of unnecessary switching and informing the statistical module;

the statistical module is used for counting the times of various unnecessary switching fault types and informing the sending module when the times of the same unnecessary switching fault type reaches a set threshold;

and the sending module is used for sending a corresponding request message according to the unnecessary switching fault type reaching the set threshold.

8. The apparatus of claim 7, further comprising a receiving module, configured to receive a handover report message sent by a handover target cell, and notify the identifying module; and the parameter adjusting module is used for receiving the parameter adjusting success message and informing the statistic module.

9. The apparatus of claim 8, wherein the identifying module determines the type of the unnecessary handover failure according to whether the obtained candidate neighbor list includes a source handover cell.

10. The apparatus of claim 9, wherein the determining the type of the unnecessary handover failure according to whether the obtained candidate neighbor list includes the source handover cell comprises:

11. The apparatus according to any one of claims 7 to 10, wherein the sending module is specifically configured to:

12. The apparatus of claim 11, wherein the statistics module is further configured to zero the corresponding statistics number according to the received parameter adjustment success message.

13. An unnecessary handover processing system is characterized by comprising a source cell base station, a target cell base station and a UE; the source cell and the target cell are different network cells;

the target cell base station is used for informing the UE to carry out coverage measurement after the UE is switched and accessed, and determining a switching report message according to a measurement result reported by the UE and sending the switching report message to the source cell base station;