CN109257778B - Cell switching method and device - Google Patents
Cell switching method and device Download PDFInfo
- Publication number
- CN109257778B CN109257778B CN201710576238.2A CN201710576238A CN109257778B CN 109257778 B CN109257778 B CN 109257778B CN 201710576238 A CN201710576238 A CN 201710576238A CN 109257778 B CN109257778 B CN 109257778B
- Authority
- CN
- China
- Prior art keywords
- link
- cell
- base station
- target base
- mme
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/00837—Determination of triggering parameters for hand-off
- H04W36/008375—Determination of triggering parameters for hand-off based on historical data
Abstract
The invention provides a cell switching method and a cell switching device. The method comprises the following steps: receiving a measurement report reported by User Equipment (UE), and generating a cell preparation set according to the measurement report, wherein the cell preparation set comprises at least one target cell; judging that an X2 link exists in a target base station corresponding to a target cell according to a pre-configured neighbor cell list, and if the history state of the X2 link in a preset time period is not changed, sending a switching request message to the target base station; receiving a switching request response message returned by the target base station, and judging whether the target base station and the target base station belong to the same Mobile Management Entity (MME) or not according to the switching request response message; and if the mobile management entity MME belongs to the same mobile management entity as the target base station, sending a switching command to the user equipment UE, wherein the switching command comprises the physical identification of the target cell so as to execute cell switching based on an X2 interface. The embodiment of the invention reduces the probability of switching failure caused by X2 link flash and improves the success rate of cell switching.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a cell switching method and a cell switching device.
Background
In a Long Term Evolution (LTE) system, when User Equipment (UE) is in a service connection state and maintains a service, the UE is moved from one cell to another cell, the original cell cannot continue to provide the service for the UE, and in order to not interrupt the service, a radio bearer system searches for a most suitable cell or network to provide the UE with the continuous service, thereby implementing mobility management of seamless coverage of a radio network, which is cell switching.
In the cell handover between different base stations eNB in the LTE system, the cell handover is divided into the cell handover based on the X2 interface and the cell handover based on the S1 interface. The X2 interface is a standard interface for mutual communication between all base stations eNB in the LTE system, and the S1 interface is a standard interface from each base station eNB in the LTE system to an Evolved Packet Core (EPC).
In the existing cell handover method between different base stations eNB based on the X2 interface, in a handover preparation phase, a source base station eNB in a signaling processing flow determines whether an X2 link exists between itself and a target base station eNB corresponding to a target cell, but in an LTE system, due to repeated activation of the target cell and other situations, the X2 link is flashed, which easily causes that an X2 link is normal at the time of querying the X2 link, but may be broken subsequently, causing a cell handover failure based on the X2 interface, resulting in a dropped call of a user.
Disclosure of Invention
The embodiment of the invention provides a cell switching method and a cell switching device, which are used for solving the problem that the switching success rate is reduced due to X2 link flash in the prior art.
In a first aspect, an embodiment of the present invention provides a cell handover method, including:
receiving a measurement report reported by User Equipment (UE), and generating a cell preparation set according to the measurement report, wherein the cell preparation set comprises at least one target cell;
judging whether an X2 link exists in a target base station corresponding to the target cell according to a pre-configured neighbor cell list;
if the X2 link is judged to exist, acquiring the historical state of the X2 link in a preset time period;
if the historical state of the X2 link is not changed in a preset time period, sending a switching request message to the target base station;
receiving a switching request response message returned by the target base station, and judging whether the target base station and the target base station belong to the same Mobile Management Entity (MME) according to the switching request response message;
and if the target base station and the target base station belong to the same Mobility Management Entity (MME) is judged, sending a switching command to the User Equipment (UE), wherein the switching command comprises the physical identification of the target cell so as to execute cell switching based on an X2 interface.
Optionally, the neighbor table includes an X2 link history state;
the method further comprises the following steps: determining the historical state of the X2 link according to X2 link flash and/or establishment events within the preset time period.
Optionally, obtaining the historical state of the X2 link within a preset time period includes:
and acquiring the historical state of the X2 link in a preset time period by inquiring the neighbor cell table.
Optionally, if the cell preparation set includes a plurality of target cells, the method further includes:
and determining an optimal target cell from a plurality of target cells which meet the conditions that the corresponding target base station and the source base station have the X2 link and the historical state of the X2 link is not changed in a preset time period and the corresponding target base station and the source base station belong to the same Mobile Management Entity (MME).
Optionally, the method further comprises:
if the X2 link does not exist, sending a handover request message to the MME to execute cell handover based on an S1 interface;
or the like, or, alternatively,
if the X2 link exists and the history state of the X2 link changes in a preset time period, sending a handover request message to the MME to perform cell handover based on an S1 interface;
or the like, or, alternatively,
if the X2 link exists, the historical state of the X2 link is not changed in a preset time period, and the X2 link and the target base station do not belong to the same Mobility Management Entity (MME), sending a handover request message to the MME so as to execute cell handover based on an S1 interface.
In a second aspect, an embodiment of the present invention provides a cell switching apparatus, including:
a cell preparation set generating unit, configured to receive a measurement report reported by User Equipment (UE), and generate a cell preparation set according to the measurement report, where the cell preparation set includes at least one target cell;
an X2 link determining unit, configured to determine, according to a pre-configured neighbor cell table, whether an X2 link exists in a target base station corresponding to the target cell;
an X2 link history state obtaining unit, configured to, when it is determined that an X2 link exists, obtain a history state of the X2 link within a preset time period;
a first handover request message sending unit, configured to send a handover request message to the target base station when a history state of the X2 link does not change within a preset time period;
a MME (mobility management entity) judging unit, configured to receive a handover request response message returned by the target base station, and judge, according to the handover request response message, whether the target base station and the MME belong to the same MME;
a handover command sending unit, configured to send a handover command to the UE when it is determined that the target base station belongs to the same MME as the target base station, where the handover command includes a physical identifier of the target cell, so as to perform cell handover based on an X2 interface.
Optionally, the neighbor table includes an X2 link history state;
further comprising:
an X2 link history state determination unit, configured to determine the history state of the X2 link according to the X2 link flash and/or the establishment event within the preset time period.
Optionally, the X2 link history status obtaining unit is further configured to:
and acquiring the historical state of the X2 link in a preset time period by inquiring the neighbor cell table.
Optionally, the method further comprises:
an optimal target cell determining unit, configured to determine, when the cell preparation set includes multiple target cells, an optimal target cell from the multiple target cells that satisfy a condition that an X2 link exists between the corresponding target base station and the source base station, and a history state of the X2 link does not change within a preset time period, and the corresponding target base station and the source base station belong to the same mobility management entity MME.
Optionally, the method further comprises:
a second handover request message sending unit, configured to send a handover request message to the mobility management entity MME to perform cell handover based on the S1 interface when it is determined that the X2 link does not exist;
or the like, or, alternatively,
when the X2 link exists and the history state of the X2 link changes in a preset time period, sending a handover request message to the MME to perform cell handover based on an S1 interface;
or the like, or, alternatively,
when judging that an X2 link exists, the historical state of the X2 link is not changed in a preset time period, and the X2 link and the target base station do not belong to the same Mobility Management Entity (MME), sending a handover request message to the MME so as to execute cell handover based on an S1 interface.
In a third aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, and a bus; wherein the content of the first and second substances,
the processor and the memory complete mutual communication through the bus;
the processor is configured to invoke program instructions in the memory to perform the cell handover method described above.
In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions, which cause the computer to execute the cell handover method described above.
According to the cell switching method and device provided by the embodiment of the invention, when the X2 link exists in the target base station corresponding to the source base station and the target cell, the historical state of the X2 link is not changed in a preset time period, and the target base station belong to the same Mobile Management Entity (MME), the cell switching based on the X2 interface is executed, the probability of switching failure caused by X2 link flash is reduced, and the success rate of cell switching is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a cell switching method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a cell switching method according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart illustrating a cell handover method according to an embodiment of the present invention. As shown in fig. 1, the method of this embodiment takes a source base station as an execution subject, and includes:
s11: receiving a measurement report reported by User Equipment (UE), and generating a cell preparation set according to the measurement report, wherein the cell preparation set comprises at least one target cell;
it should be noted that, the source base station issues connection reconfiguration measurement control to the UE, and configures the measurement type of the UE; user Equipment (UE) performs measurement type configuration according to measurement control issued by a source base station; and after the configuration of the measurement type of the user equipment UE is finished, reporting the measurement report to the source base station. And the source base station generates a cell preparation set according to the received measurement report, wherein the cell preparation set comprises at least one target cell with better service quality than the current service cell.
In practical applications, the measurement report triggering generation of the cell preparation set includes at least one of A3, a4, and a5 events. The A3 event neighbor cell is better than the serving cell; a4 event neighbor cell is better than absolute threshold; the a5 event serves cells that are worse than an absolute threshold and neighbor cells that are better than an absolute threshold.
S12: judging whether an X2 link exists in a target base station corresponding to the target cell according to a pre-configured neighbor cell list;
it should be noted that the source base station stores a pre-configured neighbor area table, the neighbor area table records X2 link information of the source base station and the target base station, and the source base station can determine whether the target base station corresponding to the target cell has an X2 link by querying the neighbor area table.
S13: if the X2 link is judged to exist, acquiring the historical state of the X2 link in a preset time period; s14: if the historical state of the X2 link is not changed in a preset time period, sending a switching request message to the target base station;
it should be noted that, after determining that the target base station corresponding to the target cell has the X2 link, the source base station in the embodiment of the present invention determines whether to perform the cell handover based on the X2 interface by obtaining the historical state of the X2 link within the preset time period. If the historical state of the X2 link does not change within a preset time period (for example, within 3 minutes), that is, no X2 link flash or X2 link establishment event occurs within the preset time period, it is indicated that the state of the X2 link within the historical preset time period is relatively stable, and it can be estimated that no flash occurs within a certain time in the future, so that the probability of handover failure due to X2 link flash can be reduced compared with the prior art, and the success rate of cell handover can be improved.
In practical applications, the HANDOVER REQUEST message sent by the source base station to the target base station is HANDOVER REQUEST signaling, which indicates the target base station to prepare for HANDOVER.
S15: receiving a switching request response message returned by the target base station, and judging whether the target base station and the target base station belong to the same Mobile Management Entity (MME) according to the switching request response message;
it should be noted that, in the LTE system, when the source base station and the target base station do not have an X2 link or are not within the range of the same MME, S1 handover is adopted, so that after the source base station determines that the source base station and the target base station have an X2 link, it is also necessary to determine whether the source base station and the target base station belong to the same MME.
In practical application, the HANDOVER request response message returned to the source base station by the target base station is a HANDOVER request complete signaling, which indicates that the HANDOVER preparation work of the target base station is completed; the signaling includes an identifier MME CODE of a mobility management entity MME of the target base station. And the source base station compares the MME CODE of the source base station with the MME CODE of the target base station, and then judges whether the source base station and the target base station belong to the same mobile management entity MME.
S16: if the target base station and the target base station belong to the same Mobility Management Entity (MME) is judged, a switching command is sent to the User Equipment (UE), and the switching command comprises a physical identifier of the target cell so as to execute cell switching based on an X2 interface;
in practical application, the handover command sent by the source base station to the UE is an RRC connection reconfiguration signaling, where the signaling commands the UE to perform a handover action, and a physical identifier of a target cell is specified in the signaling.
According to the cell switching method provided by the embodiment of the invention, when the X2 link exists in the target base station corresponding to the source base station and the target cell, the history state of the X2 link is not changed in a preset time period, and the target base station belong to the same Mobile Management Entity (MME), the cell switching based on the X2 interface is executed, the probability of switching failure caused by X2 link flash is reduced, and the success rate of cell switching is improved.
In an optional implementation manner of the embodiment of the present invention, the neighbor table includes an X2 link history state;
the method further comprises the following steps: determining the historical state of the X2 link according to X2 link flash and/or establishment events within the preset time period.
It should be noted that, in the embodiment of the present invention, the history state of the X2 link may be stored in the neighbor table, that is, a field is added in the neighbor table to identify the history state of the X2 link. In practical application, if the X2 link is flashed and/or an event is established within a preset time period, the source base station sets the history state of the X2 link in the neighbor cell table to 1, which indicates that the X2 link is changed within the preset time period; and clearing the historical state of the X2 link in the neighbor area table at preset time intervals.
Further, acquiring the historical state of the X2 link within a preset time period includes:
and acquiring the historical state of the X2 link in a preset time period by inquiring the neighbor cell table.
It can be understood that the neighbor cell table of the embodiment of the present invention records the history state of the X2 link, and in preparation for cell handover, the history state of the X2 link can be obtained by querying the neighbor cell table.
Further, if the cell preparation set includes a plurality of target cells, the method further includes:
and determining an optimal target cell from a plurality of target cells which meet the conditions that the corresponding target base station and the source base station have the X2 link and the historical state of the X2 link is not changed in a preset time period and the corresponding target base station and the source base station belong to the same Mobile Management Entity (MME).
It can be understood that the cell preparation set generated according to the measurement report reported by the UE in the embodiment of the present invention may include multiple target cells, and at this time, an optimal target cell needs to be determined from the multiple target cells through the judgment of whether an X2 link exists, the judgment of the historical state of an X2 link, and the judgment of whether the same MME belongs to the same mobility management entity, where the optimal target cell simultaneously satisfies the above three conditions, and replaces the current serving cell to serve the UE.
Fig. 2 is a flowchart illustrating a cell switching method according to an embodiment of the present invention. As shown in fig. 2, the method of this embodiment takes a source base station as an execution subject, and includes:
s21: receiving a measurement report reported by User Equipment (UE), and generating a cell preparation set according to the measurement report, wherein the cell preparation set comprises at least one target cell;
s22: judging whether an X2 link exists in a target base station corresponding to the target cell according to a pre-configured neighbor cell list;
s23: if the X2 link is judged to exist, acquiring the historical state of the X2 link in a preset time period;
s24: if the X2 link does not exist, sending a handover request message to the MME to execute cell handover based on an S1 interface;
s25: if the historical state of the X2 link is not changed in a preset time period, sending a switching request message to the target base station;
s26: if the X2 link exists and the history state of the X2 link changes in a preset time period, sending a handover request message to the MME to perform cell handover based on an S1 interface;
s27: receiving a switching request response message returned by the target base station;
s28: judging whether the target base station and the target base station belong to the same Mobile Management Entity (MME) according to the switching request response message;
s29: if the target base station and the target base station belong to the same Mobility Management Entity (MME) is judged, a switching command is sent to the User Equipment (UE), and the switching command comprises a physical identifier of the target cell so as to execute cell switching based on an X2 interface;
s210: if the X2 link exists, the historical state of the X2 link is not changed in a preset time period, and the X2 link and the target base station do not belong to the same Mobility Management Entity (MME), sending a handover request message to the MME so as to execute cell handover based on an S1 interface.
It is understood that the cell switching based on the X2 interface is executed only when three conditions of the existence of the X2 link, the no change of the history state of the X2 link and the belonging of the same mobile management entity MME are simultaneously satisfied, and the cell switching based on the S1 interface is executed as long as one of the conditions is not satisfied.
According to the cell switching method provided by the embodiment of the invention, when the X2 link exists in the target base station corresponding to the source base station and the target cell, the history state of the X2 link is not changed in a preset time period, and the target base station belong to the same Mobile Management Entity (MME), the cell switching based on the X2 interface is executed, the probability of switching failure caused by X2 link flash is reduced, and the success rate of cell switching is improved.
Fig. 3 is a schematic structural diagram of a cell switching apparatus according to an embodiment of the present invention. As shown in fig. 3, the apparatus of the embodiment of the present invention includes a cell preparation set generating unit 31, an X2 link determining unit 32, an X2 link history state obtaining unit 33, a first handover request message sending unit 34, a mobility management entity MME determining unit 35, and a handover command sending unit 36, specifically:
a cell preparation set generating unit 31, configured to receive a measurement report reported by user equipment UE, and generate a cell preparation set according to the measurement report, where the cell preparation set includes at least one target cell;
an X2 link determining unit 32, configured to determine, according to a pre-configured neighbor cell table, whether an X2 link exists in a target base station corresponding to the target cell;
an X2 link history state obtaining unit 33, configured to, when it is determined that an X2 link exists, obtain a history state of the X2 link within a preset time period;
a first handover request message sending unit 34, configured to send a handover request message to the target base station when a history state of the X2 link does not change within a preset time period;
a mobility management entity MME judging unit 35, configured to receive a handover request response message returned by the target base station, and judge, according to the handover request response message, whether the target base station and the target base station belong to the same mobility management entity MME;
a handover command sending unit 36, configured to send a handover command to the UE when it is determined that the target base station belongs to the same MME as the target base station, where the handover command includes a physical identifier of the target cell, so as to perform cell handover based on an X2 interface.
According to the cell switching device provided by the embodiment of the invention, when the X2 link exists in the target base station corresponding to the source base station and the target cell, the history state of the X2 link is not changed in a preset time period, and the target base station belong to the same Mobile Management Entity (MME), the cell switching based on the X2 interface is executed, the probability of switching failure caused by X2 link flash is reduced, and the success rate of cell switching is improved.
In an optional implementation manner of the embodiment of the present invention, the neighbor table includes an X2 link history state;
further comprising:
an X2 link history state determination unit, configured to determine the history state of the X2 link according to the X2 link flash and/or the establishment event within the preset time period.
The X2 link history status obtaining unit 33 is further configured to:
and acquiring the historical state of the X2 link in a preset time period by inquiring the neighbor cell table.
Further, still include:
an optimal target cell determining unit, configured to determine, when the cell preparation set includes multiple target cells, an optimal target cell from the multiple target cells that satisfy a condition that an X2 link exists between the corresponding target base station and the source base station, and a history state of the X2 link does not change within a preset time period, and the corresponding target base station and the source base station belong to the same mobility management entity MME.
Further, still include:
a second handover request message sending unit, configured to send a handover request message to the mobility management entity MME to perform cell handover based on the S1 interface when it is determined that the X2 link does not exist;
or the like, or, alternatively,
when the X2 link exists and the history state of the X2 link changes in a preset time period, sending a handover request message to the MME to perform cell handover based on an S1 interface;
or the like, or, alternatively,
when judging that an X2 link exists, the historical state of the X2 link is not changed in a preset time period, and the X2 link and the target base station do not belong to the same Mobility Management Entity (MME), sending a handover request message to the MME so as to execute cell handover based on an S1 interface.
The cell switching apparatus of the embodiment of the present invention may be used to implement the method embodiments, and the principle and technical effect are similar, which are not described herein again.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Referring to fig. 4, the electronic device includes: a processor (processor)41, a memory (memory)42, and a bus 43; wherein the content of the first and second substances,
the processor 41 and the memory 42 communicate with each other via a bus 43;
Furthermore, the logic instructions in the memory 42 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The present embodiments provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the cell handover methods provided by the above-described method embodiments.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the cell handover methods provided by the above-described method embodiments.
According to the cell switching method and device provided by the embodiment of the invention, when the X2 link exists in the target base station corresponding to the source base station and the target cell, the historical state of the X2 link is not changed in a preset time period, and the target base station belong to the same Mobile Management Entity (MME), the cell switching based on the X2 interface is executed, the probability of switching failure caused by X2 link flash is reduced, and the success rate of cell switching is improved.
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 an entirely hardware embodiment, an entirely 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, CD-ROM, 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.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
The above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of cell handover, comprising:
receiving a measurement report reported by User Equipment (UE), and generating a cell preparation set according to the measurement report, wherein the cell preparation set comprises at least one target cell;
judging whether an X2 link exists in a target base station corresponding to the target cell according to a pre-configured neighbor cell list;
if the X2 link is judged to exist, acquiring the historical state of the X2 link in a preset time period;
if the historical state of the X2 link is not changed in a preset time period, sending a switching request message to the target base station;
receiving a switching request response message returned by the target base station, and judging whether the target base station and the target base station belong to the same Mobile Management Entity (MME) according to the switching request response message;
if the target base station and the target base station belong to the same Mobility Management Entity (MME) is judged, a switching command is sent to the User Equipment (UE), and the switching command comprises a physical identifier of the target cell so as to execute cell switching based on an X2 interface;
wherein the neighbor table comprises an X2 link history state; the method further comprises the following steps: determining the historical state of the X2 link according to X2 link flash and/or establishment events within the preset time period.
2. The method of claim 1, wherein obtaining the historical status of the X2 link within a preset time period comprises:
and acquiring the historical state of the X2 link in a preset time period by inquiring the neighbor cell table.
3. The method of claim 1, wherein if the cell preparation set includes a plurality of target cells, the method further comprises:
and determining an optimal target cell from a plurality of target cells which meet the conditions that the corresponding target base station and the source base station have the X2 link and the historical state of the X2 link is not changed in a preset time period and the corresponding target base station and the source base station belong to the same Mobile Management Entity (MME).
4. The method of claim 1, further comprising:
if the X2 link does not exist, sending a handover request message to the MME to execute cell handover based on an S1 interface;
or the like, or, alternatively,
if the X2 link exists and the history state of the X2 link changes in a preset time period, sending a handover request message to the MME to perform cell handover based on an S1 interface;
or the like, or, alternatively,
if the X2 link exists, the historical state of the X2 link is not changed in a preset time period, and the X2 link and the target base station do not belong to the same Mobility Management Entity (MME), sending a handover request message to the MME so as to execute cell handover based on an S1 interface.
5. A cell switching apparatus, comprising:
a cell preparation set generating unit, configured to receive a measurement report reported by User Equipment (UE), and generate a cell preparation set according to the measurement report, where the cell preparation set includes at least one target cell;
an X2 link determining unit, configured to determine, according to a pre-configured neighbor cell table, whether an X2 link exists in a target base station corresponding to the target cell;
an X2 link history state obtaining unit, configured to, when it is determined that an X2 link exists, obtain a history state of the X2 link within a preset time period;
a first handover request message sending unit, configured to send a handover request message to the target base station when a history state of the X2 link does not change within a preset time period;
a MME (mobility management entity) judging unit, configured to receive a handover request response message returned by the target base station, and judge, according to the handover request response message, whether the target base station and the MME belong to the same MME;
a handover command sending unit, configured to send a handover command to the UE when it is determined that the target base station belongs to the same MME as the target base station, where the handover command includes a physical identifier of the target cell, so as to perform cell handover based on an X2 interface;
wherein the neighbor table comprises an X2 link history state; further comprising:
an X2 link history state determination unit, configured to determine the history state of the X2 link according to the X2 link flash and/or the establishment event within the preset time period.
6. The apparatus of claim 5, wherein the X2 link history status obtaining unit is further configured to:
and acquiring the historical state of the X2 link in a preset time period by inquiring the neighbor cell table.
7. The apparatus of claim 5, further comprising:
an optimal target cell determining unit, configured to determine, when the cell preparation set includes multiple target cells, an optimal target cell from the multiple target cells that satisfy a condition that an X2 link exists between the corresponding target base station and the source base station, and a history state of the X2 link does not change within a preset time period, and the corresponding target base station and the source base station belong to the same mobility management entity MME.
8. The apparatus of claim 5, further comprising:
a second handover request message sending unit, configured to send a handover request message to the mobility management entity MME to perform cell handover based on the S1 interface when it is determined that the X2 link does not exist;
or the like, or, alternatively,
when the X2 link exists and the history state of the X2 link changes in a preset time period, sending a handover request message to the MME to perform cell handover based on an S1 interface;
or the like, or, alternatively,
when judging that an X2 link exists, the historical state of the X2 link is not changed in a preset time period, and the X2 link and the target base station do not belong to the same Mobility Management Entity (MME), sending a handover request message to the MME so as to execute cell handover based on an S1 interface.
9. An electronic device, comprising: a processor, a memory, and a bus; wherein the content of the first and second substances,
the processor and the memory complete mutual communication through the bus;
a processor is configured to invoke program instructions in a memory to perform the cell handover method of any of claims 1-4.
10. A non-transitory computer readable storage medium storing computer instructions that cause a computer to perform the cell handover method of any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576238.2A CN109257778B (en) | 2017-07-14 | 2017-07-14 | Cell switching method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710576238.2A CN109257778B (en) | 2017-07-14 | 2017-07-14 | Cell switching method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109257778A CN109257778A (en) | 2019-01-22 |
| CN109257778B true CN109257778B (en) | 2020-09-29 |
Family
ID=65051197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710576238.2A Active CN109257778B (en) | 2017-07-14 | 2017-07-14 | Cell switching method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109257778B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111294883B (en) * | 2019-01-31 | 2021-12-14 | 展讯通信（上海）有限公司 | Cell reselection method and device, storage medium and user terminal |
| WO2020155172A1 (en) * | 2019-02-03 | 2020-08-06 | Oppo广东移动通信有限公司 | Service processing method and apparatus, chip, and computer program |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521919A (en) * | 2009-04-13 | 2009-09-02 | 华为技术有限公司 | Method, system and base station for judging data forwarding in X2 interface switching process |
| CN102118815A (en) * | 2011-02-28 | 2011-07-06 | 华为技术有限公司 | Switching method and wireless communication system |
| CN102271373A (en) * | 2011-08-30 | 2011-12-07 | 中兴通讯股份有限公司 | X2 handover method and device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299876B (en) * | 2007-04-30 | 2011-07-06 | 华为技术有限公司 | Synchronisation method, communication switching method, wireless network and node |
| CN101965028B (en) * | 2009-07-23 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of method, Apparatus and system realizing X2 and switch |
| KR101307766B1 (en) * | 2009-12-21 | 2013-09-12 | 한국전자통신연구원 | Method and Apparatus for Controlling Handover |
| EP2575391B1 (en) * | 2011-09-30 | 2016-07-20 | Telefonaktiebolaget LM Ericsson (publ) | Neighbor cell selection based on cell access mode for X2 based handover in a E-UTRAN |
| EP2713651A1 (en) * | 2012-09-28 | 2014-04-02 | Alcatel Lucent | Method for handover management within heterogeneous networks |
| CN103491645A (en) * | 2013-09-11 | 2014-01-01 | 大唐移动通信设备有限公司 | Method and device for managing communication links |
| CN106792930A (en) * | 2015-11-20 | 2017-05-31 | 中国移动通信集团广东有限公司 | A kind of changing method and device of base-station connected interface link |
-
2017
- 2017-07-14 CN CN201710576238.2A patent/CN109257778B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101521919A (en) * | 2009-04-13 | 2009-09-02 | 华为技术有限公司 | Method, system and base station for judging data forwarding in X2 interface switching process |
| CN102118815A (en) * | 2011-02-28 | 2011-07-06 | 华为技术有限公司 | Switching method and wireless communication system |
| CN102271373A (en) * | 2011-08-30 | 2011-12-07 | 中兴通讯股份有限公司 | X2 handover method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109257778A (en) | 2019-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102685768B (en) | The processing method of heartbeat message, the acquisition methods of heart beat cycle and access network equipment | |
| CN110831082B (en) | Cell switching method, cell switching device, RRC reestablishment method, RRC reestablishment device, storage medium and user equipment | |
| EP2835011B1 (en) | Speedy circuit-switched-fallback resorting to system-information stored in the ue | |
| EP4351225A2 (en) | Method, apparatus and device for allowing terminal to move between 4g and 5g networks | |
| CN101959262B (en) | Method and device for notifying handover failure indication information | |
| CN103108351B (en) | Wireless link failure statistical method, relevant device and communication system | |
| CN107113906B (en) | Method and device for releasing Radio Resource Control (RRC) connection | |
| CN108605266B (en) | Wireless access control method, device and system | |
| EP3668182B1 (en) | Communication method and device | |
| CN108616942B (en) | Communication method, access network equipment and terminal | |
| CN102769932B (en) | Method and device used for data transmission in circuit domain backspace | |
| US9351212B2 (en) | PLMN selection method, mobile terminal, BSC and core network device | |
| WO2018036455A1 (en) | Method and apparatus for determining paging area | |
| WO2017012299A1 (en) | Selection method and device for cell reestablishment in network sharing | |
| WO2016141752A1 (en) | Cell selection method, anr configuration method, device and computer storage medium | |
| CN104349403A (en) | Pre-switching processing method and apparatus, user equipment and cell | |
| CN108616939B (en) | Radio resource control RRC reestablishment processing method and device | |
| CN106454746B (en) | Device-to-device communication method, device and system | |
| CN109121160B (en) | Cell information reporting method, cell information indicating method, base station and terminal | |
| CN110460961B (en) | Method and system for reporting group terminal position | |
| KR102127723B1 (en) | Direction change method and device | |
| CN108260159B (en) | Different system service self-adaptive switching method and base station | |
| CN109257778B (en) | Cell switching method and device | |
| CN104955128A (en) | Load information transmission method, load information transmission system and network element | |
| CN112020899B (en) | Network access method and related equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |