CN111526541A - Method and equipment for cell switching - Google Patents

Method and equipment for cell switching Download PDF

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Publication number
CN111526541A
CN111526541A CN201910107313.XA CN201910107313A CN111526541A CN 111526541 A CN111526541 A CN 111526541A CN 201910107313 A CN201910107313 A CN 201910107313A CN 111526541 A CN111526541 A CN 111526541A
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China
Prior art keywords
target cell
switching
configuration information
terminal
cell
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CN201910107313.XA
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Chinese (zh)
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CN111526541B (en
Inventor
范江胜
张大钧
陈瑞卡
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Datang Mobile Communications Equipment Co Ltd
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Telecommunications Science and Technology Research Institute Co Ltd
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Priority to CN201910107313.XA priority Critical patent/CN111526541B/en
Publication of CN111526541A publication Critical patent/CN111526541A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • 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
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point

Abstract

The invention discloses a method and equipment for cell switching, which are used for solving the problem of unbalanced load caused by random switching when a terminal is switched in a plurality of target cells in the prior art. After receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell; and after receiving the switching command information returned by the alternative target cell, the source cell informs the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell so that the terminal selects the target cell according to the priority and the switching configuration information.

Description

Method and equipment for cell switching
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for performing cell handover.
Background
When cell switching is carried out, switching command information of one or more target cells is sent to a terminal in advance, and the terminal triggers a switching process when certain switching conditions are met.
At present, when a terminal switches a target cell, the terminal starts a corresponding measurement process after receiving measurement configuration of a source cell and when measurement conditions are met, and reports a measurement result to the source cell according to measurement reporting configuration after measurement is completed;
after receiving the measurement report sent by the terminal, the corresponding source cell makes a switching decision according to a local rule, and after the decision, the source cell determines one or more target cells and sends a switching request message to the target cells; after receiving a switching request sent by a source cell, a target cell judges whether the switching request can be accepted or not according to information such as self load and the like, and returns a switching confirmation message to the source cell after the acceptance is confirmed; after receiving the switching confirmation information returned by at least one target cell, the source cell sends a switching command to a corresponding terminal in a transparent transmission mode;
after the terminal successfully receives at least one switching command sent by the source cell, storing and applying the configuration information in the switching command to enable the terminal to establish connection with the target cell; when the terminal receives the switching command, the terminal immediately starts a timer, and if the terminal can successfully establish connection with the target cell during the running period of the timer, the connection process is finished; if the timer is overtime and the connection is not successful, the terminal is failed to switch to the target cell, and a reconstruction process is triggered.
When the terminal receives switching command information of a plurality of target cells sent by a source cell, if the terminal determines that the signal quality of the target cells meets the condition, the terminal randomly selects the target cells to switch, and the randomness of switching influences load balance.
Disclosure of Invention
The invention provides a method and equipment for cell switching, which are used for solving the problem of unbalanced load caused by random switching when a terminal is switched in a plurality of target cells in the prior art.
In a first aspect, an embodiment of the present invention provides a method for performing cell handover, where the method includes:
after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell;
and after receiving the switching command information returned by the alternative target cell, the source cell informs the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell, so that the terminal selects the target cell according to the priority and the switching configuration information.
According to the method, after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell, and after receiving switching command information returned by the terminal according to the switching request message, the source cell informs the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell so that the terminal selects the target cell to switch according to the priority and the configuration information, the terminal selects the alternative target cell corresponding to the switching configuration information as the target cell to switch according to the priority, and switches among the target cells according to the sequence, so that the phenomenon of load imbalance caused by random switching is avoided.
In a possible implementation manner, when the source cell notifies the terminal of the priority of the candidate target cell and the handover configuration information of the candidate target cell, the source cell:
the source cell informs the terminal of the switching configuration information carrying load information; or
The source cell determines the sequence of sending the switching configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and informs the terminal of the switching configuration information of the candidate target cell according to the sequence; or
And the source cell informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell.
The method provides a scheme of how the source cell informs the terminal of the switching configuration information and the priority, so as to ensure that the terminal can determine the priority of the switching configuration information of the alternative target cell.
In a possible implementation manner, when the source cell determines the sequence of sending the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and notifies the terminal of the handover configuration information of the candidate target cell according to the sequence, the source cell determines the sequence of sending the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and places the handover configuration information of the candidate target cell in at least one handover reconfiguration message according to the sequence to notify the terminal.
The method includes that when switching configuration information is sent to a terminal according to a sequence, the sequence of the switching configuration information of an alternative target cell is determined according to a priority parameter of the alternative target cell, the switching configuration information of the alternative target cell is placed in at least one switching configuration information notification terminal according to the sequence after the switching configuration information is sent, so that the terminal can determine the priority sequence of the switching configuration information according to the sequence of the received switching configuration information, and further switching is carried out according to the switching priority sequence during switching.
In a possible implementation manner, when the source cell notifies the terminal of the priority parameter of the candidate target cell and the handover configuration information of the candidate target cell, the source cell:
the source cell sends at least one switching configuration message containing the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a switching reconfiguration message; or
And the source cell sends the switching configuration information containing at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a switching reconfiguration message.
The method provides two modes of sending the switching configuration information of the candidate target cell and the priority parameter of the candidate target cell to the terminal.
In one possible implementation, the source cell determines the priority parameter of the candidate target cell by:
the source cell determines the priority parameter of the candidate target cell according to the switching command information and/or pre-stored information returned by the candidate target cell;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
The method provides a mode for determining the priority parameter of the source cell, so that the source cell can more accurately determine the priority parameter of the alternative target cell.
In a possible implementation manner, when the source cell determines the priority parameter of the candidate target cell according to the handover command information returned by the candidate target cell, the source cell analyzes the handover command information returned by the candidate target cell, and obtains the admission degree information of the candidate target cell to the terminal bearer;
and the source cell determines the priority parameter of the candidate target cell according to the admission degree information.
The method further provides that the priority parameter of the alternative target cell is determined according to the switching command information and/or the pre-stored information, so that the source cell is more accurate when determining the priority parameter of the alternative target cell.
In a second aspect, an embodiment of the present invention provides a method for performing cell handover, where the method includes:
receiving a switching request message sent by a source cell by an alternative target cell;
and the alternative target cell returns switching command information to the source cell, wherein the switching command information carries load information.
In the method, after receiving a handover request message sent by a source cell, an alternative target cell returns handover command information carrying load information to the source cell, so that the source cell forwards the handover command information carrying load information to a terminal as handover configuration information, and further, the terminal performs priority ranking on the handover configuration information according to the handover configuration information carrying load, and further performs handover according to the priority ranking.
In a third aspect, an embodiment of the present invention provides a method for performing cell handover, where the method includes:
a terminal receives the priority of an alternative target cell and switching configuration information of the alternative target cell sent by a source cell;
and the terminal selects a target cell to switch according to the priority and the switching configuration information.
According to the method, the terminal receives the priority of the alternative target cell and the switching configuration information of the alternative target cell sent by the source cell, and selects the target cell to switch according to the priority and the switching configuration information, wherein the priority of the alternative target cell of the terminal is the priority of the alternative target cell of the terminal, and the switching is performed between the alternative target cells corresponding to the switching configuration information, so that the behavior of the terminal is clear and accurate, and the load imbalance caused by random switching is avoided.
In a possible implementation manner, when a terminal receives a priority of a candidate target cell and handover configuration information of the candidate target cell, which are sent by a source cell:
the terminal receives switching configuration information carrying load information sent by the source cell; or
The terminal receives switching configuration information sent by the source cell after determining the switching configuration message sequence of the alternative target cell according to the priority parameter; or
And the terminal receives the priority parameter of the alternative target cell and the switching configuration information of the standby target cell, which are sent by the source cell.
The method provides a mode how the terminal receives the priority of the alternative target cell sent by the source cell and the switching configuration information of the alternative target cell.
In a possible implementation manner, the priority parameter is determined by the source cell according to handover command information and/or pre-stored information;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
In the above method, the priority parameter is further explained, and the priority parameter is determined according to the pre-stored information and/or the handover command information.
In a possible implementation manner, after the terminal receives the switching configuration information carrying load information sent by the source cell, and after the terminal determines that the switching configuration information carries load information, the terminal performs priority ranking on the received switching configuration information of the candidate target cell according to demodulation information of the switching configuration information;
wherein the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
In the method, the terminal determines the priority order of the switching configuration information of the candidate target cell according to the switching configuration information carrying the load information.
In a possible implementation manner, when the terminal receives the handover configuration information sent according to the priority after the source cell determines the priority of the handover configuration information of the candidate target cell according to the priority parameter, the terminal receives the handover configuration information sent after the source cell determines the priority of the handover configuration information of the candidate target cell according to the priority parameter through at least one handover reconfiguration message.
In a possible implementation manner, if the terminal receives the handover configuration information sent by the source cell through a handover reconfiguration message, the terminal performs priority ordering on the handover configuration information of the candidate target cell according to the sequence of receiving the handover configuration information; or
And if the terminal receives the switching configuration information sent by the source cell through a plurality of switching reconfiguration messages, the terminal performs priority sequencing on the switching configuration information of the alternative target cell according to the sequence of receiving the switching reconfiguration messages and the sequence of receiving the switching configuration information in the switching reconfiguration messages.
According to the method, the terminal determines the priority sequence of the switching configuration information according to the sequence of receiving the switching reconfiguration message and the sequence of receiving the switching configuration information in the switching reconfiguration message, so that the terminal can accurately determine the priority sequence of the switching configuration information.
In a possible implementation manner, when the terminal receives the priority parameter of the candidate target cell sent by the source cell and the handover configuration information of the candidate target cell:
the terminal receives at least one switching reconfiguration message which is sent by the source cell and contains the switching configuration information of the candidate target cell and the corresponding priority parameter; or
And the terminal receives a switching reconfiguration message which is sent by the source cell and contains switching configuration information of at least one alternative target cell and a corresponding priority parameter list of the target cell.
In a possible implementation manner, after the terminal receives the priority parameter of the candidate target cell sent by the source cell and the handover configuration information of the candidate target cell, the terminal performs priority ranking on the handover configuration information of the candidate target cell according to the received priority parameter of the candidate target cell.
According to the method, the terminal receives the switching configuration information and the priority parameter in a mode that the terminal smoothly receives the switching configuration information and the priority parameter, the switching configuration information is further sequenced directly according to the priority parameter, and the target cell corresponding to the switching configuration information is switched according to the sequence of the switching configuration information when the target cell is switched.
In a possible implementation manner, when the terminal selects a target cell for switching according to the priority and the switching configuration information, after the terminal selects the target cell according to the priority and the switching configuration information, whether the signal quality of the selected target cell meets a preset condition is judged;
if the preset conditions are met, the terminal initiates a switching process with the target cell, otherwise, the terminal eliminates the selected target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information.
In one possible implementation manner, the preset condition includes:
the signal quality of the target cell is greater than a first threshold; or
The target cell signal quality is greater than the second threshold and the serving cell signal quality is less than the third threshold.
According to the method, the terminal selects the target cell according to the priority and the switching configuration information during switching, then judges whether the signal quality of the target cell meets the condition, the selected target cell is removed from the alternative target cell if the signal quality of the target cell does not meet the condition, and the terminal is prevented from continuously selecting the target cell which does not meet the condition when the terminal is selected according to the priority and the switching configuration information, so that resources are wasted.
In a possible implementation manner, if a preset condition is met, after the terminal initiates handover with the target cell, the terminal determines that the handover with the target cell fails, and then judges whether the number of times of the handover failure reaches a threshold value;
and if the target cell reaches the threshold value, the terminal removes the target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information, otherwise, the terminal re-initiates the switching process with the target cell.
According to the method, the terminal selects the target cell according to the priority and the switching configuration information during switching, then judges whether the signal quality of the target cell meets the condition or not, and rejects the selected target cell from the alternative target cells when the switching failure times reach the threshold value during switching meeting the condition, so that the terminal is prevented from continuously selecting the target cell which does not meet the condition and wasting resources when the terminal is selected according to the priority and the switching configuration information.
In a possible implementation manner, if the time length of a cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell to the candidate target cell.
According to the method, a preset rejecting time length is set for the rejected target cell, when the rejected time length reaches the preset rejecting time length, the rejected target cell is added into the alternative target cell, and the terminal can still select the previously rejected target cell so as to enable the terminal to be switched to the target cell with the best signal quality.
In a fourth aspect, an embodiment of the present invention provides an apparatus for performing cell handover, where the apparatus includes: a processor, a memory, and a transceiver;
wherein the processor is configured to read the slave program in the memory and execute: after receiving a measurement report reported by a terminal, sending a switching request message to an alternative target cell;
and after receiving the switching command information returned by the candidate target cell, notifying a terminal of the priority of the candidate target cell and the switching configuration information of the candidate target cell so that the terminal selects the target cell according to the priority and the switching configuration information.
In one possible implementation, the processor is specifically configured to:
informing the terminal of the switching configuration information carrying the load information; or
Determining the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and informing the terminal of the switching configuration information of the alternative target cell according to the sequence; or
And informing the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell.
In one possible implementation, the processor is specifically configured to:
and determining the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and placing the switching configuration information of the alternative target cell in at least one switching reconfiguration message according to the sequence to inform the terminal.
In one possible implementation, the processor is specifically configured to:
sending at least one switching configuration message containing the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a switching reconfiguration message; or
And sending the switching configuration information containing at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a switching reconfiguration message.
In one possible implementation, the processor determines the priority parameter of the candidate target cell by:
determining the priority parameter of the candidate target cell according to the switching command information and/or pre-stored information returned by the candidate target cell;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
In one possible implementation, the processor is specifically configured to:
analyzing the switching command information returned by the candidate target cell to acquire the admission degree information of the candidate target cell to the terminal bearer;
and determining the priority parameter of the candidate target cell according to the admission degree information.
In a fifth aspect, an embodiment of the present invention provides an apparatus for performing cell handover, where the apparatus includes: a processor, a memory, and a transceiver;
wherein the processor is configured to read the slave program in the memory and execute: receiving a switching request message sent by a source cell; and returning switching command information to the source cell, wherein the switching command information carries load information.
In a sixth aspect, an embodiment of the present invention provides an apparatus for performing cell handover, where the apparatus includes: a processor, a memory, and a transceiver;
wherein the processor is configured to read the slave program in the memory and execute: receiving the priority of an alternative target cell and switching configuration information of the alternative target cell sent by a source cell; and selecting a target cell for switching according to the priority and the switching configuration information.
In one possible implementation, the processor is specifically configured to:
receiving switching configuration information carrying load information sent by the source cell; or
Receiving switching configuration information sent by the source cell after determining the sequence of the switching configuration information of the alternative target cell according to the priority parameter; or
And receiving the priority parameter of the alternative target cell and the switching configuration information of the standby target cell, which are sent by the source cell.
In a possible implementation manner, the priority parameter is determined by the source cell according to handover command information and/or pre-stored information;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
In one possible implementation, the processor is further configured to:
after determining that the switching configuration information carries load information, carrying out priority sequencing on the received switching configuration information of the alternative target cell according to demodulation information of the switching configuration information;
wherein the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
In one possible implementation, the processor is further configured to:
and receiving the switching configuration information sent by the source cell after determining the switching configuration information sequence of the alternative target cell according to the priority parameter through at least one switching reconfiguration message.
In a possible implementation manner, if the processor receives the handover configuration information sent by the source cell through a handover reconfiguration message, the processor performs priority ranking on the handover configuration information of the candidate target cell according to the order of receiving the handover configuration information; or
And if the processor receives the switching configuration information sent by the source cell through a plurality of switching reconfiguration messages, performing priority ordering on the switching configuration information of the alternative target cell according to the sequence of receiving the switching reconfiguration messages and the sequence of receiving the switching configuration information in the switching reconfiguration messages.
In one possible implementation, the processor is further configured to:
receiving at least one switching reconfiguration message which is sent by the source cell and contains switching configuration information of the candidate target cell and corresponding priority parameters; or
And receiving a handover reconfiguration message which is sent by the source cell and contains the handover configuration information of at least one candidate target cell and the corresponding priority parameter list of the target cell.
In one possible implementation, the processor is further configured to:
and carrying out priority ordering on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell.
In one possible implementation, the processor is specifically configured to:
after selecting a target cell according to the priority and the switching configuration information, judging whether the signal quality of the selected target cell meets a preset condition;
if the preset conditions are met, initiating a switching process with the target cell, otherwise, removing the selected target cell from the alternative target cell, and returning to the step of selecting the target cell according to the priority and the switching configuration information.
In one possible implementation manner, the preset condition includes:
the signal quality of the target cell is greater than a first threshold; or
The target cell signal quality is greater than the second threshold and the serving cell signal quality is less than the third threshold.
In one possible implementation, the processor is further configured to:
after determining that the switching between the target cell and the target cell fails, judging whether the switching failure frequency reaches a threshold value;
if the target cell reaches the threshold value, the target cell is removed from the alternative target cell, and the step of selecting the target cell according to the priority and the switching configuration information is returned, otherwise, the switching process with the target cell is restarted.
In one possible implementation, the processor is further configured to:
and if the time length of the cell removed from the candidate target cell reaches the preset time length and the cell is not successfully switched to the target cell, adding the removed cell into the candidate target cell.
In a seventh aspect, an embodiment of the present invention provides an apparatus for performing cell handover, where the apparatus includes:
the sending module is used for sending a switching request message to the alternative target cell after receiving the measurement report reported by the terminal;
and the notification module is used for notifying the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell after receiving the switching command information returned by the alternative target cell so that the terminal can select the target cell according to the priority and the switching configuration information.
In an eighth aspect, an embodiment of the present invention provides an apparatus for performing cell handover, where the apparatus includes:
a first receiving module, configured to receive a handover request message sent by a source cell;
and a returning module, configured to return switching command information to the source cell, where the switching command information carries load information.
In a ninth aspect, an embodiment of the present invention provides an apparatus for performing cell handover, where the apparatus includes:
a second receiving module, configured to receive the priority of the candidate target cell and the handover configuration information of the candidate target cell, where the priority is sent by the source cell;
and the switching module is used for selecting the target cell to switch according to the priority and the switching configuration information.
In a tenth aspect, embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of performing any of the cell handovers.
In addition, for technical effects brought by any one implementation manner of the fourth aspect to the tenth aspect, reference may be made to technical effects brought by different implementation manners of the first aspect and the third aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for performing cell handover in the prior art;
fig. 2 is a structural diagram of a system for performing cell handover according to an embodiment of the present invention;
fig. 3 is a flowchart of a first cell handover procedure according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a terminal performing handover according to a priority order of handover configuration information according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a second cell handover procedure according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a third cell handover procedure according to an embodiment of the present invention;
fig. 7 is a fourth flowchart for performing cell handover according to an embodiment of the present invention;
fig. 8 is a flowchart of a fifth cell handover procedure according to an embodiment of the present invention;
fig. 9 is a structural diagram of a first device for performing cell handover according to an embodiment of the present invention;
fig. 10 is a structural diagram of a second device for performing cell handover according to an embodiment of the present invention;
fig. 11 is a structural diagram of a third apparatus for performing cell handover according to an embodiment of the present invention;
fig. 12 is a structural diagram of a fourth apparatus for performing cell handover according to an embodiment of the present invention;
fig. 13 is a diagram of a fifth apparatus for performing cell handover according to an embodiment of the present invention;
fig. 14 is a diagram of a sixth apparatus for performing cell handover according to an embodiment of the present invention;
fig. 15 is a flowchart of a first method for performing cell handover according to an embodiment of the present invention;
fig. 16 is a flowchart of a second method for performing cell handover according to an embodiment of the present invention;
fig. 17 is a flowchart of a third method for performing cell handover according to an embodiment of the present invention.
Detailed Description
Hereinafter, some terms in the embodiments of the present invention are explained to facilitate understanding by those skilled in the art.
(1) In the embodiments of the present invention, the terms "network" and "system" are often used interchangeably, but those skilled in the art can understand the meaning.
(2) The term "plurality" in the embodiments of the present invention means two or more, and other terms are similar thereto.
(3) "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
(4) The cell in the embodiment of the invention refers to network side equipment or the coverage area of the network side equipment.
Cell handover in a wireless communication system, handover is required in order to keep a terminal from interrupting communication when the terminal moves from one cell to another cell.
When switching cells, a terminal reports a measurement report to a source cell, the source cell makes a measurement decision according to the measurement report reported by the terminal and sends a switching request message to a determined target cell, the target cell performs a switching confirmation process according to self load information and the like after receiving the switching request message to determine whether to accept terminal access, after determining that the terminal access can be accepted, the target cell returns a switching confirmation message to the source cell, the source cell sends a switching command to the terminal after receiving the switching confirmation message after the target cell meals, and the terminal prepares to switch to a new cell according to the received switching command, specifically, as shown in fig. 1.
In the process, a source cell sends handover commands of a plurality of target cells to a terminal, if the signal quality of the target cells meets preset conditions, the terminal does not determine which target cell to establish connection with, and if the terminal determines which target cell to connect to from the perspective of the terminal, when the signal quality of the target cells is comparable, the terminal is more prone to handover to a cell with a smaller load or supporting an RAT (Radio Access technology) of the terminal; however, in a full-network sense, implementing load balancing is also one of the factors of important consideration of network robustness, and when a terminal performs random handover among a plurality of target cells, the terminal challenges the robustness of network-side equipment based on load balancing.
Based on the above, when the terminal receives the handover command of the target cell sent by the source cell and the signal quality of a plurality of target cells meets the condition, the terminal will switch to the target cell randomly, and the behavior of the terminal is unclear; therefore, the embodiment of the present invention provides a method and a device for cell switching, where after receiving a switching command returned by an alternative target cell, a source cell in the embodiment of the present invention notifies a terminal of a priority of the alternative target cell and switching configuration information of the target cell, so that the terminal can select the target cell according to the priority and the switching configuration information, and the terminal performs priority ranking on the switching configuration information according to the priority, and further selects an alternative target cell corresponding to the switching configuration information according to the priority ranking of the switching configuration information to perform cell switching.
The terminal is a device with a wireless communication function, can be deployed on land, and comprises an indoor or outdoor terminal, a handheld terminal or a vehicle-mounted terminal; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal may be a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc.; but also UEs in various forms, Mobile Stations (MSs), the terminal equipment (terminal device).
The network side device is a device for providing a wireless communication function for the terminal, and includes but is not limited to: a gbb in 5G, a Radio Network Controller (RNC), a Node B (NB), a cell controller (BSC), a Base Transceiver Station (BTS), a home cell (e.g., home evolved node B or home node B, HNB), a BaseBand Unit (BBU), a transmission point (TRP), a Transmission Point (TP), a mobile switching center (TP), and the like.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention with each creative effort belong to the protection scope of the present invention.
In view of the foregoing scenario, an embodiment of the present invention provides a schematic structural diagram of a system for performing cell handover, and specifically, as shown in fig. 2, the system includes:
a source cell 20, configured to send a handover request message to an alternative target cell after the source cell receives a measurement report reported by a terminal; and after receiving the switching command information returned by the alternative target cell, the source cell informs the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell, so that the terminal selects the target cell according to the priority and the switching configuration information.
The alternative target cell 21 is configured to receive a handover request message sent by a source cell; and the alternative target cell returns switching command information to the source cell, wherein the switching command information carries load information.
A terminal 22, configured to receive the priority of the candidate target cell and the handover configuration information of the candidate target cell sent by the source cell; and the terminal selects a target cell to switch according to the priority and the switching configuration information.
In the method, after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell, receives switching command information returned by the terminal according to the switching request message, and sends priority and switching configuration information to the terminal after receiving the switching command information, so that the terminal selects the target cell to switch according to the priority and the switching configuration information; when the terminal selects the target cell to switch according to the switching priority and the switching configuration information, the terminal clearly switches the target cell according to the priority, and load imbalance caused by random switching is avoided.
After receiving the switching command information returned by the alternative target cell, the source cell transmits the switching command information carrying the load information to the terminal; or determining the priority parameter of the switching command information according to the load information of the alternative target cell and/or the access technology information of the alternative target cell and then notifying the terminal in a transparent transmission mode; or after the source cell analyzes the handover command, the priority parameter of the handover command information is determined according to the analyzed admission degree information to the terminal, and then the terminal is notified in a non-transparent transmission manner, when the terminal is notified in a non-transparent transmission manner of the handover configuration information of the candidate target cell and the priority of the candidate target cell, and when the source cell determines the priority parameter, the priority parameter can also be determined according to the load information of the candidate target cell and/or the access technology information of the candidate target cell, and the detailed explanation is specifically performed through the following centralized embodiment.
The first embodiment is as follows:
and the source cell informs the terminal of the switching configuration information carrying the load information, and implicitly informs the terminal of the priority of the alternative target cell.
As shown in fig. 3, a first flowchart for performing cell handover according to an embodiment of the present invention specifically includes the following steps:
step 300, after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell;
in specific implementation, after receiving a measurement report reported by a terminal, a source cell determines an alternative target cell by performing handover decision according to a preset rule, and after determining the alternative target cell, sends a handover request message to the alternative target cell.
Step 310, after receiving a handover request message sent by a source cell, an alternative target cell returns handover command information to the source cell, wherein the handover command information carries load information;
in specific implementation, after receiving a handover request message sent by the source cell, the candidate target cell determines whether the handover request can be accepted according to the information of its own load, and after determining that the handover request can be accepted, returns handover command information carrying its own load information to the source cell, where the load information carried by the source cell is used to instruct the terminal to sequence the priorities of the received candidate target cells.
Step 320, after receiving the switching command information carrying the load information returned by the candidate target cell, the source cell notifies the terminal of the switching configuration information carrying the load information;
it should be noted that the source cell notifies the terminal that the handover configuration information is the handover command information returned by the candidate target cell, and at this time, the source cell notifies the terminal of the handover configuration information carrying the load information in a transparent transmission manner.
In specific implementation, the source cell notifies the terminal of the switching configuration information carrying the load information through at least one switching reconfiguration message;
one handover reconfiguration message may include one handover configuration information carrying load information, or may include a plurality of handover configuration information carrying load information.
Step 330, the terminal receives the switching configuration information carrying load information sent by the source cell, and after determining that the switching configuration information carries load information, performs priority ordering on the received switching configuration information of the candidate target cell according to the demodulation information of the switching configuration information;
the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
And the terminal receives the switching configuration information carrying the load information sent by the source cell through at least one switching reconfiguration message.
In specific implementation, after receiving a handover reconfiguration message sent by the source cell, the terminal demodulates the handover reconfiguration message, determines that load information used for instructing the terminal to perform priority ranking on alternative target cells is carried in handover configuration information in the received handover reconfiguration message, and further performs priority ranking on the received handover configuration information based on alternative target cell load in the demodulated handover configuration information and/or the admission degree of the alternative target cell to the terminal bearer and/or alternative target cell access technology information;
for example, the following steps are carried out: when the switching configuration information is subjected to priority ranking according to the load of the alternative target cell, the priority with the lowest load is the highest, and the corresponding priority with the highest load is the lowest;
when the switching configuration information is subjected to priority ranking according to the admission degree of the terminal load, the priority with high admission degree is high, and the priority with low corresponding admission degree is low;
when the switching configuration information is subjected to priority ranking according to the access technology, the switching configuration information corresponding to the alternative target cell supporting terminal access has high priority;
when the priority ranking is carried out on the switching reconfiguration messages according to at least two of the load, the admission degree and the access technology, a weight calculation mode can be adopted, and the priority with large weight is high; it is also possible to use a configuration indication manner to indicate which kind of reference is used as the main reference, such as indicating the load information, and at this time, the priority order is determined according to the load information of the candidate target cells.
Step 340, the terminal selects a target cell to switch according to the priority order of the switching configuration information;
specifically, as shown in fig. 4, a flowchart for performing handover by a terminal according to a priority order of handover configuration information provided in the embodiment of the present invention specifically includes the following steps:
step 410, the terminal selects a target cell according to the priority order of the switching configuration information;
step 420, the terminal determines whether the signal quality of the selected target cell meets a preset condition, if so, step 430 is executed, otherwise, step 450 is executed;
wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The signal quality of the target cell is greater than a second threshold value, and the signal quality of the serving cell is less than a third threshold value;
wherein the first threshold or the second threshold is configured by a target cell or a source cell.
Step 430, the terminal initiates a handover procedure with the target cell and determines that the handover with the target cell fails;
step 440, the terminal determines whether the number of failures reaches a threshold, if so, step 450 is executed, otherwise, step 460 is executed;
and 450, the terminal eliminates the target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information.
Step 460, the terminal re-initiates the handover procedure with the target cell;
in specific implementation, when a terminal selects a target cell to switch according to the priority order of the switching configuration information of the candidate target cell, the terminal firstly selects a target cell corresponding to the switching configuration information with the highest priority to switch;
in the switching process, the terminal judges whether the signal quality of the selected target cell meets a preset condition;
the first condition is as follows: if the preset conditions are met, the terminal initiates a switching process with the target cell and determines whether the terminal is successfully switched with the target cell;
if the unsuccessful switching is determined, the terminal judges whether the failure times reach a threshold value, after the failure times reach the threshold value, the terminal eliminates the target cell from the alternative target cells, selects an alternative target cell with the highest priority level from the rest alternative target cells according to the priority level sequence as the target cell, judges whether the selected target cell meets a preset condition or not, and the like until the terminal meets a stop condition; or when the failure times are determined not to reach the threshold value, adding one to the current failure times, and continuing to initiate a switching process with the target cell; if the switching is determined to be successful, ending and returning a switching completion message.
For example, the priority order is: the priority of the switching configuration information A of the alternative target cell A is higher than that of the switching configuration information B, the priority of the switching configuration information B is higher than that of the switching configuration information C, and the like; at the moment, the terminal takes the alternative target cell A as a target cell, the target quality of the target cell A meets a preset condition, the terminal initiates a switching process with the target cell A, the terminal determines that the switching with the target cell A fails, if the threshold of the failure times is 3, the terminal determines that the failure times does not reach the threshold, the terminal continues to initiate the switching process with the target cell A, if the switching is successful, the switching is stopped, otherwise, the terminal determines whether the failure times reaches the threshold or not, the threshold is not reached, the switching process with the target cell A is continued, whether the switching is successful is determined, if the switching is failed, the failure times reaches the threshold, the target cell A is removed from the alternative target cells, an alternative target cell with the highest priority is selected from the rest alternative target cells to be used as the target cell to execute the switching process, and the alternative target cell B in the rest alternative target cells has the highest priority, therefore, the alternative target cell B is used as the target cell to execute the handover process, and the steps of judging whether the target cell meets the preset condition and the like are executed, and so on until the terminal meets the stop condition.
Case two: if the preset condition is not met, the terminal removes the target cell from the alternative target cells, returns to select the alternative target cell as the target cell according to the priority sequence, selects the alternative target cell with the highest priority from the remaining alternative target cells as the target cell when the target cell is selected, namely selects the alternative target cell with the priority next to the removed target cell as the target cell to be switched, executes the steps of judging whether the preset condition is met or not, and the like until the terminal meets the stop condition, and stops switching with the target cell;
wherein the stop condition includes: the terminal and the target cell are successfully switched, or all the alternative target cells do not meet the conditions, or the time for switching the terminal and the target cell is up.
For example, the priority order is: the priority of the switching configuration information A of the alternative target cell A is higher than that of the switching configuration information B, the priority of the switching configuration information B is higher than that of the switching configuration information C, and the like;
and at the moment, the terminal selects an alternative target cell A as a target cell, judges whether the target cell A meets a preset condition, eliminates the target cell A from the alternative target cells after determining that the target cell A does not meet the preset condition, reselects an alternative target cell with the highest priority from the remaining alternative target cells as the alternative cell according to the priority sequence, selects an alternative target cell B as the target cell at the moment, and judges whether the signal quality of the target cell B meets the preset condition.
In the embodiment of the invention, after the target cell is removed from the alternative target cell, the removed cell is timed, and when the time length of the removed target cell reaches the preset time length and the terminal is not successfully switched with the target cell, the removed target cell is added into the alternative target cell, so that when the terminal selects the target cell according to the priority, the target cell which is removed and then added again can be selected.
Optionally, if the time length of the cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell into the candidate target cell.
For example, the priority order is: the priority of the switching configuration information A of the alternative target cell A is higher than that of the switching configuration information B, the priority of the switching configuration information B is higher than that of the switching configuration information C, and the like; and the alternative target cell A is a rejected target cell, and the target cell A is added into the alternative target cell again after the time length for rejecting the alternative target cell A reaches the preset time length.
In the implementation, the elimination duration is set to prevent the terminal from returning to the target cell with the highest priority for switching to cause resource waste when the terminal is switched with other candidate target cells after the signal quality of the candidate target cell with the highest priority is determined to not meet the condition.
According to the method, the priority sequence of the switching configuration information of the alternative target cell is informed to the terminal in an implicit mode that the switching configuration information carries load information, so that the terminal can switch in the target cell corresponding to the switching configuration information according to the finally determined priority sequence of the switching configuration information, the terminal switches in the target cells according to the priority sequence, the phenomenon that the self behavior is unclear and random switching is not clear, namely the phenomenon that the target cell is switched to is unknown is avoided, and the influence of the random switching on the load balance of network side equipment is reduced.
Example two:
the source cell determines the priority parameter of the candidate target cell according to the pre-stored information, informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell, and informs the terminal of the priority of the candidate target cell through the transparent transmission mode display.
As shown in fig. 5, a second flowchart for performing cell handover according to an embodiment of the present invention specifically includes the following steps:
step 500, after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell;
step 510, after receiving a handover request message sent by a source cell, an alternative target cell returns handover command information to the source cell, where the handover command information does not carry load information;
step 520, after receiving the switching command information returned by the candidate target cell, the source cell determines the priority parameter of the candidate target cell according to the pre-stored information;
it should be noted that the priority parameter is a priority sequence number corresponding to the switching configuration information of the candidate target cell after the switching configuration information of the candidate target cell is sequenced according to the pre-stored information, and the priority sequence number may be represented by a number;
for example, the priority of the handover configuration information of the candidate target cell a is higher than that of the handover configuration information of the candidate target cell B, and the priority of the handover configuration information of the candidate target cell B is higher than that of the handover configuration information of the candidate target cell C, where the priority order is: the corresponding sequence numbers of the handover configuration information of the candidate target cell a, the handover configuration information of the candidate target cell B, and the handover configuration information of the candidate target cell C are 1, 2, and 3, so that the priority parameter of the candidate target cell a may be represented by 1.
Wherein the pre-stored information comprises: alternative target cell load information and/or alternative target cell access technology information;
in specific implementation, a source cell and an alternative target cell perform information interaction, the alternative target cell reports information to the source cell, and the information reporting can be performed periodically and actively, or can be performed after receiving the information of the source cell;
and the source cell records the information reported by the alternative target cell, namely the pre-stored information, and determines the priority parameter of the switching configuration information of the alternative target cell according to the recorded configuration information corresponding to the alternative target cell for the switching configuration information of the alternative target cell after receiving the switching command information returned by the alternative target cell.
The priority ranking of the handover configuration information of the candidate target cell is performed according to the candidate target cell load information and/or the candidate target cell access technology information, which is not explained herein, and is specifically described in the first embodiment.
Step 530, the source cell informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell;
it should be noted that the source cell notifies the terminal that the handover configuration information is the handover command information returned by the candidate target cell.
In specific implementation, the source cell notifies the terminal of the priority parameter of the alternative target cell and the switching configuration information of the alternative target cell through at least one switching reconfiguration message; each switching reconfiguration message can carry switching configuration information of at least one alternative target cell and priority parameters of the alternative target cells;
if the one switching reconfiguration message carries the priority parameters of a plurality of candidate target cells and the switching configuration information of the candidate target cells, the switching reconfiguration message has the following two forms:
the first form: taking the switching configuration information of the candidate target cell and the priority parameter of the corresponding candidate target cell as a group of information to be carried in a switching reconfiguration message, wherein the switching reconfiguration message has at least one group of information containing the switching configuration information of the target cell and the priority parameter of the corresponding candidate target cell;
optionally, the source cell sends at least one handover configuration message including the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a handover reconfiguration message.
The second form: taking the switching configuration information of a plurality of candidate target cells as a group of information, taking the priority parameters of the corresponding candidate target cells as another group of information in the form of a priority parameter list, wherein the switching reconfiguration information carries the two groups of information, and at the moment, the switching configuration information corresponds to the priority parameters in the priority parameter list one by one, namely, the first priority parameter in the priority parameter list is defined to correspond to the first switching configuration information in the switching reconfiguration information, and so on;
optionally, the source cell sends the handover configuration information including at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a handover reconfiguration message.
In the embodiment of the present invention, the source cell may also send the handover configuration information of a plurality of candidate target cells to the terminal through at least one handover reconfiguration message, and configure a priority parameter list of the candidate target cells corresponding to the handover configuration information included in the handover reconfiguration message behind the handover reconfiguration message; the priority parameters in the priority parameter list correspond to the handover configuration parameters in the handover reconfiguration message one to one, that is, the first priority parameter in the priority parameter list is defined to correspond to the first handover configuration information in the handover reconfiguration message, and so on.
Step 540, the terminal receives the switching configuration information of the candidate target cell and the priority parameter of the candidate target cell, which are sent by the source cell; carrying out priority ordering on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell;
in specific implementation, a terminal receives switching configuration information of an alternative target cell and priority parameters of the alternative target cell, wherein the switching configuration information is sent by a source cell through at least one switching reconfiguration message;
in specific implementation, after the terminal receives at least one handover reconfiguration message, the terminal demodulates the received at least one handover reconfiguration message, may determine a correspondence between the handover configuration information of each candidate target cell and the priority parameter of the candidate target cell, and further performs priority ranking on the handover configuration information of the candidate target cells according to the priority parameter, that is, determines the priority order of the handover configuration information of the candidate target cells according to the priority parameter.
Step 550, the terminal selects the target cell to switch according to the priority order of the candidate target cells;
when selecting the target cell, the preferred candidate target cell with the highest priority is used as the target cell.
The specific switching process is detailed in fig. 4; in the switching process, the terminal judges whether the signal quality of the selected target cell meets a preset condition; wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The signal quality of the target cell is greater than a second threshold value, and the signal quality of the serving cell is less than a third threshold value;
wherein the first threshold or the second threshold is configured by a target cell or a source cell.
The first condition is as follows: if the preset conditions are met, the terminal initiates a switching process with the target cell and determines whether the terminal is successfully switched with the target cell;
if the unsuccessful switching is determined, the terminal judges whether the failure times reach a threshold value, after the failure times reach the threshold value, the terminal eliminates the target cell from the alternative target cells, selects an alternative target cell with the highest priority level from the rest alternative target cells according to the priority level sequence as the target cell, judges whether the selected target cell meets a preset condition or not, and the like until the terminal meets a stop condition; or when the failure times are determined not to reach the threshold value, adding one to the current failure times, and continuing to initiate a switching process with the target cell; if the switching is determined to be successful, ending and returning a switching completion message.
Case two: if the preset condition is not met, the terminal removes the target cell from the alternative target cells, returns to select the alternative target cell as the target cell according to the priority sequence, selects the alternative target cell with the highest priority from the remaining alternative target cells as the target cell when the target cell is selected, namely selects the alternative target cell with the priority next to the removed target cell as the target cell to be switched, executes the steps of judging whether the preset condition is met or not, and the like until the terminal meets the stop condition, and stops switching with the target cell;
wherein the stop condition includes: the terminal and the target cell are successfully switched, or all the alternative target cells do not meet the conditions, or the time for switching the terminal and the target cell is up.
In the embodiment of the invention, after the target cell is removed from the alternative target cell, the removed cell is timed, and when the time length of the removed target cell reaches the preset time length and the terminal is not successfully switched with the target cell, the removed target cell is added into the alternative target cell, so that when the terminal selects the target cell according to the priority, the target cell which is removed and then added again can be selected.
Optionally, if the time length of the cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell to the candidate target cell.
In the implementation, the elimination duration is set to prevent the terminal from returning to the target cell with the highest priority for switching to cause resource waste when the terminal is switched with other candidate target cells after the signal quality of the candidate target cell with the highest priority is determined to not meet the condition.
The method determines the priority parameter of the candidate target cell according to the pre-stored load information of the candidate target cell and/or the access technology information of the candidate target cell, and informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell in a display mode, so that the terminal determines the priority sequence of the switching configuration information of the candidate target cell according to the priority parameter of the candidate target cell and switches with the target cell corresponding to the switching configuration information according to the priority sequence, the phenomenon that the behavior of the terminal is unclear and random switching is not known, namely the phenomenon that the terminal is not switched to which target cell is unknown, and the influence of the random switching on the load balance of network side equipment is reduced.
Example three:
the source cell determines a priority parameter of the alternative target cell according to pre-stored information, performs priority ordering on the switching configuration information of the alternative target cell according to the priority parameter, notifies the switching configuration information of the alternative target cell to the terminal according to the sequence, and notifies the terminal of the priority of the alternative target cell implicitly through a transparent transmission mode.
As shown in fig. 6, a third flowchart for performing cell handover according to the embodiment of the present invention specifically includes the following steps:
step 600, after receiving a measurement report reported by a terminal, a source cell sends a handover request message to an alternative target cell;
step 610, after receiving a handover request message sent by a source cell, a candidate target cell returns handover command information to the source cell, where the handover command information does not carry load information;
step 620, after receiving the switching command information returned by the candidate target cell, the source cell determines the priority parameter of the candidate target cell according to the pre-stored information;
step 630, the source cell performs priority ordering on the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell;
it should be noted that the priority parameter is a priority sequence number corresponding to the switching configuration information of the candidate target cell after the switching configuration information of the candidate target cell is sequenced according to the pre-stored information, and the priority sequence number may be represented by a number;
for example, the source cell determines that the priority of the handover configuration information of the candidate target cell a is higher than that of the handover configuration information of the candidate target cell C, the priority of the handover configuration information of the candidate target cell C is higher than that of the handover configuration information of the candidate target cell B, and sets the priority parameter of the candidate target cell a to 1, the priority parameter of the candidate target cell B to 3, and the priority parameter of the candidate target cell C to 2, so that the priority ranking of the handover configuration information of the candidate target cells according to the priority parameters is as follows: handover configuration information of the candidate target cell a, handover configuration information of the candidate target cell C, and handover configuration information of the candidate target cell B.
Wherein the pre-stored information comprises: alternative target cell load information and/or alternative target cell access technology information;
in specific implementation, a source cell and an alternative target cell perform information interaction, the alternative target cell reports information to the source cell, and the information reporting can be performed periodically and actively, or can be performed after receiving the information of the source cell;
and the source cell records the information reported by the alternative target cell, namely the pre-stored information, and determines the priority parameter of the switching configuration information of the alternative target cell according to the recorded configuration information corresponding to the alternative target cell for the switching configuration information of the alternative target cell after receiving the switching command information returned by the alternative target cell.
The priority ranking of the handover configuration information of the candidate target cell is performed according to the candidate target cell load information and/or the candidate target cell access technology information, which is not explained herein, and is specifically described in the first embodiment.
Step 640, the source cell places the handover configuration information of the candidate target cell in at least one handover reconfiguration message according to the priority order of the handover configuration information of the candidate target cell to notify the terminal;
optionally, if the terminal is notified of the handover configuration information of the candidate target cell through a handover reconfiguration message, the source cell sorts the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and places the handover configuration information in a handover reconfiguration message according to the sorting order to notify the terminal;
specifically, a source cell notifies a terminal through a handover reconfiguration message, the source cell sorts the handover configuration information sequence of a candidate target cell in the handover reconfiguration message according to the determined priority sequence of the handover configuration message, and places the handover configuration information with the highest priority in the first bit of the handover reconfiguration message; placing the switching configuration information with the second priority in the second position in the switching reconfiguration message, and so on;
for example, the priority of the handover configuration information a is higher than that of the handover configuration information B, and the priority of the handover configuration information B is higher than that of the handover configuration information C, so that when the source cell notifies the terminal of the handover configuration information through one handover reconfiguration message, the source cell notifies the terminal through one handover reconfiguration message in the order of the handover configuration information a, the handover configuration information B, and the handover configuration information C.
Optionally, if the terminal is notified of the handover configuration information of the candidate target cell through multiple handover reconfiguration messages, the source cell sorts the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, places at least one handover configuration information in one handover reconfiguration message according to the sorting order, and notifies the terminal of multiple handover reconfiguration messages according to the sorting order.
Specifically, the source cell notifies the terminal through a plurality of handover reconfiguration messages, the source cell sorts the handover reconfiguration messages and the handover configuration information sequence of the candidate target cell in the handover reconfiguration messages according to the determined priority sequence of the handover configuration messages, places at least one handover configuration message in one handover reconfiguration message according to the sorted priority sequence, and notifies the terminal of the plurality of handover reconfiguration messages according to the priority of the configuration message; the switching configuration information with the highest priority is placed in the first position in the first notification to the terminal switching reconfiguration message; determining to place the Nth switching configuration information in the last bit of the first notification terminal switching reconfiguration message according to the priority sequence; determining to place the (N + 1) th switching configuration information in the first bit of the second notification terminal switching reconfiguration message according to the priority sequence, and so on;
for example, the priority of the switching configuration information a is higher than that of the switching configuration information B, the priority of the switching configuration information B is higher than that of the switching configuration information C, and the priority of the switching configuration information C is higher than that of the switching configuration information D;
the priority order of the handover configuration information is therefore: a source cell uses switching configuration information A, switching configuration information B, switching configuration information C and switching configuration information D; if N is 3; at this time, the switching configuration information A, the switching configuration information B and the switching configuration information C are arranged in the first switching reconfiguration message A according to the sequence, and the switching configuration information D is arranged at the first position of the switching reconfiguration message B in the second switching reconfiguration message.
Step 650, the terminal receives the switching configuration information of the candidate target cell sent by the source cell; determining the priority sequence of the switching configuration information of the alternative target cell according to the received switching reconfiguration message sequence and the sequence of the switching configuration information in the received switching reconfiguration message;
specifically, the terminal receives handover configuration information of the candidate target cell sent by the source cell through at least one handover reconfiguration message.
Optionally, if the terminal receives the handover configuration information sent by the source cell through a handover reconfiguration message, the terminal performs priority ranking on the handover configuration information of the candidate target cell according to the sequence of receiving the handover configuration information;
for example, if the sequence in which the source cell sends the switching configuration information to the terminal through one switching reconfiguration message is switching configuration information a, switching configuration information B, and switching configuration information C, the sequence in which the terminal receives the switching configuration information in the switching reconfiguration information is switching configuration information a, switching configuration information B, and switching configuration information C, the terminal determines that the priority of the switching configuration information a is higher than the priority of the switching configuration information B, and the priority of the switching configuration information B is higher than the priority of the switching configuration information C.
Optionally, if the terminal receives the handover configuration information sent by the source cell through multiple handover reconfiguration messages, the terminal performs priority ranking on the handover configuration information of the candidate target cell according to the sequence of receiving the handover reconfiguration messages and the sequence of receiving the handover configuration information in the handover reconfiguration messages.
For example, the source cell sends handover configuration information to the terminal through multiple handover reconfiguration messages; the source cell firstly sends a first switching reconfiguration message A to the terminal, and sends a second switching reconfiguration message B to the terminal, and at the moment, the terminal determines that the priority of the switching configuration information in the first switching reconfiguration message A is higher than that in the second switching reconfiguration message B;
when the source cell sends the switching configuration information in the first switching reconfiguration message, the switching configuration information A is sent firstly, the switching configuration information B is sent, the switching configuration information C is sent finally, and the switching configuration information D is sent in the second reconfiguration message, at the moment, the terminal determines that the priority of the switching configuration information A is higher than that of the switching configuration information B, the priority of the switching configuration information B is higher than that of the switching configuration information C, and the priority of the switching configuration information C is higher than that of the switching configuration information D.
Step 660, the terminal selects a target cell for switching according to the priority order of the switching configuration information;
when selecting the target cell, the preferred candidate target cell with the highest priority is used as the target cell.
The specific switching process is detailed in fig. 4; in the switching process, the terminal judges whether the signal quality of the selected target cell meets a preset condition; wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The signal quality of the target cell is greater than a second threshold value, and the signal quality of the serving cell is less than a third threshold value;
wherein the first threshold or the second threshold is configured by a target cell or a source cell.
The first condition is as follows: if the preset conditions are met, the terminal initiates a switching process with the target cell and determines whether the terminal is successfully switched with the target cell;
if the unsuccessful switching is determined, the terminal judges whether the failure times reach a threshold value, after the failure times reach the threshold value, the terminal eliminates the target cell from the alternative target cells, selects an alternative target cell with the highest priority level from the rest alternative target cells according to the priority level sequence as the target cell, judges whether the selected target cell meets a preset condition or not, and the like until the terminal meets a stop condition; or when the failure times are determined not to reach the threshold value, adding one to the current failure times, and continuing to initiate a switching process with the target cell; if the switching is determined to be successful, ending and returning a switching completion message.
Case two: if the preset condition is not met, the terminal removes the target cell from the alternative target cells, returns to select the alternative target cell as the target cell according to the priority sequence, selects the alternative target cell with the highest priority from the remaining alternative target cells as the target cell when the target cell is selected, namely selects the alternative target cell with the priority next to the removed target cell as the target cell to be switched, executes the steps of judging whether the preset condition is met or not, and the like until the terminal meets the stop condition, and stops switching with the target cell;
wherein the stop condition includes: the terminal and the target cell are successfully switched, or all the alternative target cells do not meet the conditions, or the time for switching the terminal and the target cell is up.
In the embodiment of the invention, after the target cell is removed from the alternative target cell, the removed cell is timed, and when the time length of the removed target cell reaches the preset time length and the terminal is not successfully switched with the target cell, the removed target cell is added into the alternative target cell, so that when the terminal selects the target cell according to the priority, the target cell which is removed and then added again can be selected.
Optionally, if the time length of the cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell to the candidate target cell.
In the implementation, the elimination duration is set to prevent the terminal from returning to the target cell with the highest priority for switching to cause resource waste when the terminal is switched with other candidate target cells after the signal quality of the candidate target cell with the highest priority is determined to not meet the condition.
In the method, the source cell determines the priority parameter of the candidate target cell according to the pre-stored load information of the candidate target cell and/or the access technology information of the candidate target cell, and notifies the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell in a stealth mode of determining the priority according to the sending sequence, so that the terminal determines the priority sequence of the switching configuration information of the candidate target cell according to the sequence of receiving the switching configuration information and switches the target cell corresponding to the switching configuration information according to the priority sequence, the phenomenon that the self behavior is unclear and random switching is not known, namely the phenomenon that the target cell is switched to is unknown is avoided, and the influence of the random switching on the load balance of network side equipment is reduced.
Example four:
the source cell determines the priority parameter of the candidate target cell according to the switching command information, informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell, and informs the terminal of the priority of the candidate target cell through non-transparent transmission mode display.
As shown in fig. 7, a fourth flowchart for performing cell handover according to the embodiment of the present invention specifically includes the following steps:
step 700, after receiving a measurement report reported by a terminal, a source cell sends a handover request message to an alternative target cell;
step 710, after receiving a handover request message sent by a source cell, a candidate target cell returns handover command information to the source cell, where the handover command information does not carry load information;
step 720, after receiving the switching command information returned by the alternative target cell, the source cell analyzes the switching command information to obtain the acceptance degree information of the alternative target cell corresponding to the switching command information to the terminal;
step 730, the source cell determines the priority parameter of the candidate target cell according to the admission degree information and/or pre-stored information;
it should be noted that the priority parameter is a priority sequence number corresponding to the switching configuration information of the candidate target cell after the switching configuration information of the candidate target cell is sequenced according to the pre-stored information, and the priority sequence number may be represented by a number;
for example, the priority of the handover configuration information of the candidate target cell a is higher than that of the handover configuration information of the candidate target cell B, and the priority of the handover configuration information of the candidate target cell B is higher than that of the handover configuration information of the candidate target cell C, where the priority order is: the corresponding sequence numbers of the handover configuration information of the candidate target cell a, the handover configuration information of the candidate target cell B, and the handover configuration information of the handover configuration information C are 1, 2, and 3, so that the priority parameter of the candidate target cell a may be represented by 1.
The priority parameter may also be determined according to pre-stored information, wherein the pre-stored information includes: alternative target cell load information and/or alternative target cell access technology information;
in specific implementation, a source cell firstly analyzes successfully received switching command information returned by alternative target cells to obtain the admission degree information of each alternative target cell to a terminal load, a further source cell deletes the unsuitable switching configuration information of the alternative target cells according to pre-stored alternative target cell load information, the admission program information of the alternative target cells to the terminal load and/or the access technology information of the alternative target cells, and determines the priority parameters of the remaining alternative target cells according to the pre-stored alternative target cell load information, the admission program information of the alternative target cells to the terminal load and/or the access technology information of the alternative target cells;
how to prioritize the handover configuration information of the candidate target cell according to the admission degree information of the candidate target cell to the terminal bearer and/or the load information of the candidate target cell and/or the access technology information of the candidate target cell obtained by analysis is not explained herein, and details are described in the first embodiment.
740, the source cell informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell;
it should be noted that the source cell notifies the terminal that the handover configuration information is the handover command information returned by the candidate target cell.
In specific implementation, the source cell notifies the terminal of the priority parameters of the remaining candidate target cells and the corresponding switching configuration information of the candidate target cells through at least one switching reconfiguration message; each switching reconfiguration message can carry switching configuration information of at least one alternative target cell and priority parameters of the alternative target cells;
if the one switching reconfiguration message carries the priority parameters of a plurality of candidate target cells and the switching configuration information of the candidate target cells, the switching reconfiguration message has the following two forms:
the first form: taking the switching configuration information of the candidate target cell and the priority parameter of the corresponding candidate target cell as a group of information to be carried in a switching reconfiguration message, wherein the switching reconfiguration message has at least one group of information containing the switching configuration information of the target cell and the priority parameter of the corresponding candidate target cell;
optionally, the source cell sends at least one handover configuration message including the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a handover reconfiguration message.
The second form: taking the switching configuration information of a plurality of candidate target cells as a group of information, taking the priority parameters of the corresponding candidate target cells as another group of information in the form of a priority parameter list, wherein the switching reconfiguration information carries the two groups of information, and at the moment, the switching configuration information corresponds to the priority parameters in the priority parameter list one by one, namely, the first priority parameter in the priority parameter list is defined to correspond to the first switching configuration information in the switching reconfiguration information, and so on;
optionally, the source cell sends the handover configuration information including at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a handover reconfiguration message.
In the embodiment of the present invention, the source cell may also send the handover configuration information of a plurality of candidate target cells to the terminal through at least one handover reconfiguration message, and configure a priority parameter list of the candidate target cells corresponding to the handover configuration information included in the handover reconfiguration message behind the handover reconfiguration message; the priority parameters in the priority parameter list correspond to the handover configuration parameters in the handover reconfiguration message one to one, that is, the first priority parameter in the priority parameter list is defined to correspond to the first handover configuration information in the handover reconfiguration message, and so on.
Step 750, a terminal receives switching configuration information of an alternative target cell and a priority parameter of the alternative target cell, wherein the switching configuration information is sent by a source cell; carrying out priority ordering on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell;
in specific implementation, a terminal receives switching configuration information of an alternative target cell and priority parameters of the alternative target cell, wherein the switching configuration information is sent by a source cell through at least one switching reconfiguration message;
in specific implementation, after the terminal receives at least one handover reconfiguration message, the terminal demodulates the received at least one handover reconfiguration message, may determine a correspondence between the handover configuration information of each candidate target cell and the priority parameter of the candidate target cell, and further performs priority ranking on the handover configuration information of the candidate target cells according to the priority parameter, that is, determines the priority order of the handover configuration information of the candidate target cells according to the priority parameter.
760, the terminal selects the target cell to switch according to the priority order of the candidate target cells;
when selecting the target cell, the preferred candidate target cell with the highest priority is used as the target cell.
The specific switching process is detailed in fig. 4; in the switching process, the terminal judges whether the signal quality of the selected target cell meets a preset condition; wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The signal quality of the target cell is greater than a second threshold value, and the signal quality of the serving cell is less than a third threshold value;
wherein the first threshold or the second threshold is configured by a target cell or a source cell.
The first condition is as follows: if the preset conditions are met, the terminal initiates a switching process with the target cell and determines whether the terminal is successfully switched with the target cell;
if the unsuccessful switching is determined, the terminal judges whether the failure times reach a threshold value, after the failure times reach the threshold value, the terminal eliminates the target cell from the alternative target cells, selects an alternative target cell with the highest priority level from the rest alternative target cells according to the priority level sequence as the target cell, judges whether the selected target cell meets a preset condition or not, and the like until the terminal meets a stop condition; or when the failure times are determined not to reach the threshold value, adding one to the current failure times, and continuing to initiate a switching process with the target cell; if the switching is determined to be successful, ending and returning a switching completion message.
Case two: if the preset condition is not met, the terminal removes the target cell from the alternative target cells, returns to select the alternative target cell as the target cell according to the priority sequence, selects the alternative target cell with the highest priority from the remaining alternative target cells as the target cell when the target cell is selected, namely selects the alternative target cell with the priority next to the removed target cell as the target cell to be switched, executes the steps of judging whether the preset condition is met or not, and the like until the terminal meets the stop condition, and stops switching with the target cell;
wherein the stop condition includes: the terminal and the target cell are successfully switched, or all the alternative target cells do not meet the conditions, or the time for switching the terminal and the target cell is up.
In the embodiment of the invention, after the target cell is removed from the alternative target cell, the removed cell is timed, and when the time length of the removed target cell reaches the preset time length and the terminal is not successfully switched with the target cell, the removed target cell is added into the alternative target cell, so that when the terminal selects the target cell according to the priority, the target cell which is removed and then added again can be selected.
Optionally, if the time length of the cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell to the candidate target cell.
In the implementation, the elimination duration is set to prevent the terminal from returning to the target cell with the highest priority for switching to cause resource waste when the terminal is switched with other candidate target cells after the signal quality of the candidate target cell with the highest priority is determined to not meet the condition.
In the method, the source cell analyzes the switching command information to determine the admission degree information of the terminal, and determines the priority parameter of the candidate target cell according to the information of the admission degree to the terminal and the pre-stored load information of the candidate target cell and/or the access technology information of the candidate target cell, and informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell in a display mode, so that the terminal determines the priority order of the switching configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and the target cell corresponding to the switching configuration information is switched according to the priority sequence, so that the phenomenon of random switching with unclear self behavior is avoided, namely, the phenomenon of switching to which target cell is unknown, and the influence of random switching on load balance of network side equipment is reduced.
Example five:
the source cell determines a priority parameter of the alternative target cell according to the switching command information and the configuration information of the alternative target cell, performs priority sequencing on the switching configuration information of the alternative target cell according to the priority parameter, notifies the switching configuration information of the alternative target cell to the terminal according to the sequence, and implicitly notifies the terminal of the priority of the alternative target cell through a non-transparent transmission mode.
As shown in fig. 8, a fifth flowchart for performing cell handover according to an embodiment of the present invention specifically includes the following steps:
step 800, after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell;
step 810, after receiving the handover request message sent by the source cell, the candidate target cell returns a handover command message to the source cell, where the handover command message does not carry load information;
step 820, after receiving the switching command information returned by the candidate target cell, the source cell analyzes the switching command information to obtain the acceptance degree information of the candidate target cell corresponding to the switching command information to the terminal;
step 830, the source cell determines a priority parameter of the candidate target cell according to the admission degree information and/or pre-stored information;
it should be noted that the priority parameter is a priority sequence number corresponding to the switching configuration information of the candidate target cell after the switching configuration information of the candidate target cell is sequenced according to the pre-stored information, and the priority sequence number may be represented by a number;
for example, the source cell determines that the priority of the handover configuration information of the candidate target cell a is higher than that of the handover configuration information of the candidate target cell C, the priority of the handover configuration information of the candidate target cell C is higher than that of the handover configuration information of the candidate target cell B, and sets the priority parameter of the candidate target cell a to 1, the priority parameter of the candidate target cell B to 3, and the priority parameter of the candidate target cell C to 2, so that the priority ranking of the handover configuration information of the candidate target cells according to the priority parameters is as follows: handover configuration information of the candidate target cell a, handover configuration information of the candidate target cell C, and handover configuration information of the candidate target cell B.
The priority parameter may also be determined according to pre-stored information, the pre-stored information including: alternative target cell load information and/or alternative target cell access technology information;
in specific implementation, a source cell firstly analyzes successfully received switching command information returned by alternative target cells to obtain the admission degree information of each alternative target cell to a terminal load, a further source cell deletes the unsuitable switching configuration information of the alternative target cells according to pre-stored alternative target cell load information, the admission program information of the alternative target cells to the terminal load and/or the access technology information of the alternative target cells, and determines the priority parameters of the remaining alternative target cells according to the pre-stored alternative target cell load information, the admission program information of the alternative target cells to the terminal load and/or the access technology information of the alternative target cells;
how to prioritize the handover configuration information of the candidate target cell according to the admission degree information of the candidate target cell to the terminal bearer and/or the load information of the candidate target cell and/or the access technology information of the candidate target cell obtained by analysis is not explained herein, and details are described in the first embodiment.
840, the source cell performs priority ordering on the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell;
step 850, the source cell puts the switching configuration information of the candidate target cell into at least one switching reconfiguration message according to the priority order of the switching configuration information of the candidate target cell to inform the terminal;
optionally, if the terminal is notified of the handover configuration information of the candidate target cell through a handover reconfiguration message, the source cell sorts the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and places the handover configuration information in a handover reconfiguration message according to the sorting order to notify the terminal;
specifically, a source cell notifies a terminal through a handover reconfiguration message, the source cell sorts the handover configuration information sequence of a candidate target cell in the handover reconfiguration message according to the determined priority sequence of the handover configuration message, and places the handover configuration information with the highest priority in the first bit of the handover reconfiguration message; placing the switching configuration information with the second priority in the second position in the switching reconfiguration message, and so on;
optionally, if the terminal is notified of the handover configuration information of the candidate target cell through multiple handover reconfiguration messages, the source cell sorts the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, places at least one handover configuration information in one handover reconfiguration message according to the sorting order, and notifies the terminal of multiple handover reconfiguration messages according to the sorting order.
Specifically, the source cell notifies the terminal through a plurality of handover reconfiguration messages, the source cell sorts the handover reconfiguration messages and the handover configuration information sequence of the candidate target cell in the handover reconfiguration messages according to the determined priority sequence of the handover configuration messages, places at least one handover configuration message in one handover reconfiguration message according to the sorted priority sequence, and notifies the terminal of the plurality of handover reconfiguration messages according to the priority of the configuration message; the switching configuration information with the highest priority is placed in the first position in the first notification to the terminal switching reconfiguration message; determining to place the Nth switching configuration information in the last bit of the first notification terminal switching reconfiguration message according to the priority sequence; determining to place the (N + 1) th switching configuration information in the first bit of the second notification terminal switching reconfiguration message according to the priority sequence, and so on;
step 860, the terminal receives the handover configuration information of the candidate target cell sent by the source cell, and determines the priority order of the handover configuration information of the candidate target cell according to the received handover reconfiguration message order and the order of receiving the handover configuration information in the handover reconfiguration message;
specifically, the terminal receives handover configuration information of the candidate target cell sent by the source cell through at least one handover reconfiguration message.
Optionally, if the terminal receives the handover configuration information sent by the source cell through a handover reconfiguration message, the terminal performs priority ranking on the handover configuration information of the candidate target cell according to the sequence of receiving the handover configuration information;
for example, if the sequence in which the source cell sends the switching configuration information to the terminal through one switching reconfiguration message is switching configuration information a, switching configuration information B, and switching configuration information C, the sequence in which the terminal receives the switching configuration information in the switching reconfiguration information is switching configuration information a, switching configuration information B, and switching configuration information C, the terminal determines that the priority of the switching configuration information a is higher than the priority of the switching configuration information B, and the priority of the switching configuration information B is higher than the priority of the switching configuration information C.
Optionally, if the terminal receives the handover configuration information sent by the source cell through multiple handover reconfiguration messages, the terminal performs priority ranking on the handover configuration information of the candidate target cell according to the sequence of receiving the handover reconfiguration messages and the sequence of receiving the handover configuration information in the handover reconfiguration messages.
For example, the source cell sends handover configuration information to the terminal through multiple handover reconfiguration messages; the source cell firstly sends a first switching reconfiguration message A to the terminal, and sends a second switching reconfiguration message B to the terminal, and at the moment, the terminal determines that the priority of the switching configuration information in the first switching reconfiguration message A is higher than that in the second switching reconfiguration message B;
when the source cell sends the switching configuration information in the first switching reconfiguration message, the switching configuration information A is sent firstly, the switching configuration information B is sent, the switching configuration information C is sent finally, and the switching configuration information D is sent in the second reconfiguration message, at the moment, the terminal determines that the priority of the switching configuration information A is higher than that of the switching configuration information B, the priority of the switching configuration information B is higher than that of the switching configuration information C, and the priority of the switching configuration information C is higher than that of the switching configuration information D.
870, the terminal selects the target cell to switch according to the priority order of the candidate target cells;
when selecting the target cell, the preferred candidate target cell with the highest priority is used as the target cell.
The specific switching process is detailed in fig. 4; in the switching process, the terminal judges whether the signal quality of the selected target cell meets a preset condition; wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The signal quality of the target cell is greater than a second threshold value, and the signal quality of the serving cell is less than a third threshold value;
wherein the first threshold or the second threshold is configured by a target cell or a source cell.
The first condition is as follows: if the preset conditions are met, the terminal initiates a switching process with the target cell and determines whether the terminal is successfully switched with the target cell;
if the unsuccessful switching is determined, the terminal judges whether the failure times reach a threshold value, after the failure times reach the threshold value, the terminal eliminates the target cell from the alternative target cells, selects an alternative target cell with the highest priority level from the rest alternative target cells according to the priority level sequence as the target cell, judges whether the selected target cell meets a preset condition or not, and the like until the terminal meets a stop condition; or when the failure times are determined not to reach the threshold value, adding one to the current failure times, and continuing to initiate a switching process with the target cell; if the switching is determined to be successful, ending and returning a switching completion message.
Case two: if the preset condition is not met, the terminal removes the target cell from the alternative target cells, returns to select the alternative target cell as the target cell according to the priority sequence, selects the alternative target cell with the highest priority from the remaining alternative target cells as the target cell when the target cell is selected, namely selects the alternative target cell with the priority next to the removed target cell as the target cell to be switched, executes the steps of judging whether the preset condition is met or not, and the like until the terminal meets the stop condition, and stops switching with the target cell;
wherein the stop condition includes: the terminal and the target cell are successfully switched, or all the alternative target cells do not meet the conditions, or the time for switching the terminal and the target cell is up.
In the embodiment of the invention, after the target cell is removed from the alternative target cell, the removed cell is timed, and when the time length of the removed target cell reaches the preset time length and the terminal is not successfully switched with the target cell, the removed target cell is added into the alternative target cell, so that when the terminal selects the target cell according to the priority, the target cell which is removed and then added again can be selected.
Optionally, if the time length of the cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell to the candidate target cell.
In the implementation, the elimination duration is set to prevent the terminal from returning to the target cell with the highest priority for switching to cause resource waste when the terminal is switched with other candidate target cells after the signal quality of the candidate target cell with the highest priority is determined to not meet the condition.
In the above embodiment, the source cell parses the handover command information to determine the admission degree information to the terminal, and determines the priority parameter of the candidate target cell according to the information of the admission degree to the terminal and the pre-stored load information of the candidate target cell and/or the access technology information of the candidate target cell, and notifying the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell in a stealth mode of determining the priority according to the sending sequence, so that the terminal determines the priority order of the handover configuration information of the candidate target cells according to the order of receiving the handover configuration information, and the target cell corresponding to the switching configuration information is switched according to the priority sequence, so that the phenomenon of random switching with unclear self behavior is avoided, namely, the phenomenon of switching to which target cell is unknown, and the influence of random switching on load balance of network side equipment is reduced.
As shown in fig. 9, a first apparatus for performing cell handover according to an embodiment of the present invention includes a processor 900, a memory 901, and a transceiver 902;
the processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 may store data used by the processor 900 in performing operations. The transceiver 902 is used for receiving and transmitting data under the control of the processor 900.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 901, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 900 is responsible for managing the bus architecture and general processing, and the memory 901 may store data used by the processor 900 in performing operations.
The processes disclosed in the embodiments of the present invention may be applied to the processor 900, or implemented by the processor 900. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 900. The processor 900 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 901, and the processor 900 reads the information in the memory 901 and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 900 is configured to read a program in the memory 901 and execute: after receiving a measurement report reported by a terminal, sending a switching request message to an alternative target cell;
and after receiving the switching command information returned by the candidate target cell, notifying a terminal of the priority of the candidate target cell and the switching configuration information of the candidate target cell so that the terminal selects the target cell according to the priority and the switching configuration information.
Optionally, the processor 900 is specifically configured to:
informing the terminal of the switching configuration information carrying the load information; or
Determining the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and informing the terminal of the switching configuration information of the alternative target cell according to the sequence; or
And informing the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell.
Optionally, the processor 900 is specifically configured to:
and determining the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and placing the switching configuration information of the alternative target cell in at least one switching reconfiguration message according to the sequence to inform the terminal.
Optionally, the processor 900 is specifically configured to:
sending at least one switching configuration message containing the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a switching reconfiguration message; or
And sending the switching configuration information containing at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a switching reconfiguration message.
Optionally, the processor 900 determines the priority parameter of the candidate target cell by:
determining the priority parameter of the candidate target cell according to the switching command information and/or pre-stored information returned by the candidate target cell;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
Optionally, the processor 900 is specifically configured to:
analyzing the switching command information returned by the candidate target cell to acquire the admission degree information of the candidate target cell to the terminal bearer;
and determining the priority parameter of the candidate target cell according to the admission degree information.
As shown in fig. 10, a second apparatus for performing cell handover according to an embodiment of the present invention includes a sending module 1000, and a notifying module 1010;
a sending module 1000, configured to send a handover request message to an alternative target cell after receiving a measurement report reported by a terminal;
a notifying module 1010, configured to notify the terminal of the priority of the candidate target cell and the handover configuration information of the candidate target cell after receiving the handover command information returned by the candidate target cell, so that the terminal selects the target cell according to the priority and the handover configuration information.
As shown in fig. 11, a third apparatus for performing cell handover according to an embodiment of the present invention includes a processor 1100, a memory 1101, and a transceiver 1102;
the processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 in performing operations. The transceiver 1102 is used to receive and transmit data under the control of the processor 1100.
The bus architecture may include any number of interconnected buses and bridges, with various circuits specifically represented by one or more of processor 1100 and memory represented by memory 1101 linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 in performing operations.
The processes disclosed in the embodiments of the invention can be implemented in the processor 1100, or implemented by the processor 1100. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1100. The processor 1100 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1101, and the processor 1100 reads information in the memory 1101, and completes the steps of the signal processing flow in combination with hardware thereof.
Specifically, the processor 1100 is configured to read a program in the memory 1101 and execute: receiving a switching request message sent by a source cell; and returning switching command information to the source cell, wherein the switching command information carries load information.
As shown in fig. 12, a fourth apparatus for performing cell handover according to the embodiment of the present invention includes a first receiving module 1200, and a returning module 1210;
a first receiving module 1200, configured to receive a handover request message sent by a source cell;
a returning module 1210, configured to return handover command information to the source cell, where the handover command information carries load information.
As shown in fig. 13, a fifth apparatus for performing cell handover according to an embodiment of the present invention includes a processor 1300, a memory 1301, and a transceiver 1302;
the processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1301 may store data used by the processor 1300 in performing operations. The transceiver 1302 is used to receive and transmit data under the control of the processor 1300.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by the processor 1300 and various circuits of the memory represented by the memory 1301 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1301 may store data used by the processor 1300 in performing operations.
The processes disclosed in the embodiments of the present invention may be implemented in the processor 1300 or implemented by the processor 1300. In implementation, the steps of the signal processing flow may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1300. The processor 1300 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1301, and the processor 1300 reads information in the memory 1301 and completes the steps of the signal processing flow in combination with hardware thereof.
Specifically, the processor 1300 is configured to read the program in the memory 1301 and execute: receiving the priority of an alternative target cell and switching configuration information of the alternative target cell sent by a source cell; and selecting a target cell for switching according to the priority and the switching configuration information.
Optionally, the processor 1300 is specifically configured to:
receiving switching configuration information carrying load information sent by the source cell; or
Receiving switching configuration information sent by the source cell after determining the sequence of the switching configuration information of the alternative target cell according to the priority parameter; or
And receiving the priority parameter of the alternative target cell and the switching configuration information of the standby target cell, which are sent by the source cell.
Optionally, the priority parameter is determined by the source cell according to handover command information and/or pre-stored information;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
Optionally, the processor 1300 is further configured to:
after determining that the switching configuration information carries load information, carrying out priority sequencing on the received switching configuration information of the alternative target cell according to demodulation information of the switching configuration information;
wherein the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
Optionally, the processor 1300 is further configured to:
and receiving the switching configuration information sent by the source cell after determining the switching configuration information sequence of the alternative target cell according to the priority parameter through at least one switching reconfiguration message.
Optionally, if the processor 1300 receives the handover configuration information sent by the source cell through a handover reconfiguration message, the processor performs priority ranking on the handover configuration information of the candidate target cell according to the order of receiving the handover configuration information; or
If the processor 1300 receives the handover configuration information sent by the source cell through a plurality of handover reconfiguration messages, the handover configuration information of the candidate target cell is prioritized according to the order of receiving the handover reconfiguration messages and the order of receiving the handover configuration information in the handover reconfiguration messages.
Optionally, the processor 1300 is further configured to:
receiving at least one switching reconfiguration message which is sent by the source cell and contains switching configuration information of the candidate target cell and corresponding priority parameters; or
And receiving a handover reconfiguration message which is sent by the source cell and contains the handover configuration information of at least one candidate target cell and the corresponding priority parameter list of the target cell.
Optionally, the processor 1300 is further configured to:
and carrying out priority ordering on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell.
Optionally, the processor 1300 is specifically configured to:
after selecting a target cell according to the priority and the switching configuration information, judging whether the signal quality of the selected target cell meets a preset condition;
if the preset conditions are met, initiating a switching process with the target cell, otherwise, removing the selected target cell from the alternative target cell, and returning to the step of selecting the target cell according to the priority and the switching configuration information.
Optionally, the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The target cell signal quality is greater than the second threshold and the serving cell signal quality is less than the third threshold.
Optionally, the processor 1300 is further configured to:
after determining that the switching between the target cell and the target cell fails, judging whether the switching failure frequency reaches a threshold value;
if the target cell reaches the threshold value, the target cell is removed from the alternative target cell, and the step of selecting the target cell according to the priority and the switching configuration information is returned, otherwise, the switching process with the target cell is restarted.
Optionally, the processor 1300 is further configured to:
and if the time length of the cell removed from the candidate target cell reaches the preset time length and the cell is not successfully switched to the target cell, adding the removed cell into the candidate target cell.
As shown in fig. 14, a sixth apparatus for performing cell handover according to an embodiment of the present invention includes a second receiving module 1400, a handover module 1410;
a second receiving module 1400, configured to receive the priority of the candidate target cell and the handover configuration information of the candidate target cell, where the priority is sent by the source cell;
a switching module 1410, configured to select a target cell for switching according to the priority and the switching configuration information.
Based on the same inventive concept, the embodiment of the present invention further provides a method for performing cell handover, and since the device corresponding to the method is a device for performing cell handover in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the method can be implemented by referring to the implementation of the device, and repeated details are not repeated.
As shown in fig. 15, a flowchart of a method for performing cell handover according to an embodiment of the present invention specifically includes the following steps:
1500, the source cell sends a switching request message to the alternative target cell after receiving the measurement report reported by the terminal;
step 1510, after receiving the handover command information returned by the candidate target cell, the source cell notifies the terminal of the priority of the candidate target cell and the handover configuration information of the candidate target cell, so that the terminal selects the target cell according to the priority and the handover configuration information.
Optionally, the notifying, by the source cell, the terminal of the priority of the candidate target cell and the handover configuration information of the candidate target cell includes:
the source cell informs the terminal of the switching configuration information carrying load information; or
The source cell determines the sequence of sending the switching configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and informs the terminal of the switching configuration information of the candidate target cell according to the sequence; or
And the source cell informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell.
Optionally, the determining, by the source cell, a sequence of sending the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and notifying, according to the sequence, the terminal of the handover configuration information of the candidate target cell includes:
and the source cell determines the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and places the switching configuration information of the alternative target cell in at least one switching reconfiguration message according to the sequence to inform the terminal.
Optionally, the notifying, by the source cell, the terminal of the priority parameter of the candidate target cell and the handover configuration information of the candidate target cell includes:
the source cell sends at least one switching configuration message containing the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a switching reconfiguration message; or
And the source cell sends the switching configuration information containing at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a switching reconfiguration message.
Optionally, the source cell determines the priority parameter of the candidate target cell by the following method:
the source cell determines the priority parameter of the candidate target cell according to the switching command information and/or pre-stored information returned by the candidate target cell;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
Optionally, the determining, by the source cell, the priority parameter of the candidate target cell according to the handover command information returned by the candidate target cell includes:
the source cell analyzes the switching command information returned by the candidate target cell, and obtains the admission degree information of the candidate target cell to the terminal bearing;
and the source cell determines the priority parameter of the candidate target cell according to the admission degree information.
Based on the same inventive concept, the embodiment of the present invention provides a method for performing cell handover, and since the device corresponding to the method is a device for performing cell handover in the embodiment of the present invention, and the principle of the device for solving the problem is similar to the method, the method can be implemented by referring to the implementation of the device, and repeated details are not repeated.
As shown in fig. 16, a flowchart of a method for performing cell handover according to an embodiment of the present invention specifically includes the following steps:
1600, receiving a switching request message sent by a source cell by the alternative target cell;
step 1610, the candidate target cell returns a handover command message to the source cell, where the handover command message carries load information.
Based on the same inventive concept, the embodiment of the present invention further provides a method for performing cell handover, and since the device corresponding to the method is a device for performing cell handover in the embodiment of the present invention, and the principle of the device for solving the problem is similar to that of the method, the method can be implemented by referring to the implementation of the device, and repeated details are not repeated.
As shown in fig. 17, a flowchart of a method for performing cell handover according to an embodiment of the present invention specifically includes the following steps:
step 1700, a terminal receives a priority of an alternative target cell and switching configuration information of the alternative target cell, which are sent by a source cell;
step 1710, the terminal selects a target cell to switch according to the priority and the switching configuration information.
Optionally, the receiving, by the terminal, the priority of the candidate target cell and the handover configuration information of the candidate target cell, which are sent by the source cell, includes:
the terminal receives switching configuration information carrying load information sent by the source cell; or
The terminal receives switching configuration information sent by the source cell after determining the switching configuration message sequence of the alternative target cell according to the priority parameter; or
And the terminal receives the priority parameter of the alternative target cell and the switching configuration information of the standby target cell, which are sent by the source cell.
Optionally, the priority parameter is determined by the source cell according to handover command information and/or pre-stored information;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
Optionally, after the terminal receives the handover configuration information carrying the load information sent by the source cell, the method further includes:
after the terminal determines that the switching configuration information carries load information, the terminal performs priority ordering on the received switching configuration information of the alternative target cell according to the demodulation information of the switching configuration information;
wherein the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
Optionally, the receiving, by the terminal, the switching configuration information sent according to the sequence after the source cell determines the sequence of the switching configuration message of the candidate target cell according to the priority parameter includes:
and the terminal receives the switching configuration information sent by the source cell after determining the switching configuration information sequence of the alternative target cell according to the priority parameter through at least one switching reconfiguration message.
Optionally, if the terminal receives the handover configuration information sent by the source cell through a handover reconfiguration message, the terminal performs priority ranking on the handover configuration information of the candidate target cell according to the sequence of receiving the handover configuration information; or
And if the terminal receives the switching configuration information sent by the source cell through a plurality of switching reconfiguration messages, the terminal performs priority sequencing on the switching configuration information of the alternative target cell according to the sequence of receiving the switching reconfiguration messages and the sequence of receiving the switching configuration information in the switching reconfiguration messages.
Optionally, the receiving, by the terminal, the priority of the candidate target cell and the handover configuration information of the candidate target cell sent by the source cell includes:
the terminal receives at least one switching reconfiguration message which is sent by the source cell and contains the switching configuration information of the candidate target cell and the corresponding priority parameter; or
And the terminal receives a switching reconfiguration message which is sent by the source cell and contains switching configuration information of at least one alternative target cell and a corresponding priority parameter list of the target cell.
Optionally, after the terminal receives the priority of the candidate target cell and the handover configuration information of the candidate target cell, where the priority is sent by the source cell, the method further includes:
and the terminal performs priority sequencing on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell.
Optionally, the selecting, by the terminal, a target cell to be switched according to the priority and the switching configuration information includes:
after the terminal selects a target cell according to the priority and the switching configuration information, judging whether the signal quality of the selected target cell meets a preset condition;
if the preset conditions are met, the terminal initiates a switching process with the target cell, otherwise, the terminal eliminates the selected target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information.
Optionally, the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The target cell signal quality is greater than the second threshold and the serving cell signal quality is less than the third threshold.
Optionally, if a preset condition is met, after the terminal initiates handover with the target cell, the method further includes:
after the terminal determines that the switching between the terminal and the target cell fails, judging whether the switching failure frequency reaches a threshold value;
and if the target cell reaches the threshold value, the terminal removes the target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information, otherwise, the terminal re-initiates the switching process with the target cell.
Optionally, if the time length of the cell removed from the candidate target cell reaches a preset time length and the terminal is not successfully switched to the target cell, adding the removed cell into the candidate target cell.
Embodiments of the present invention also provide a computer-readable medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method described in fig. 15, or implements the steps of the method described in fig. 16, or implements the steps of the method described in fig. 17.
The present invention is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the invention. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, 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, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.
Accordingly, the present invention may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the invention can take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this document, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (42)

1. A method for performing cell handover, the method comprising:
after receiving a measurement report reported by a terminal, a source cell sends a switching request message to an alternative target cell;
and after receiving the switching command information returned by the alternative target cell, the source cell informs the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell, so that the terminal selects the target cell according to the priority and the switching configuration information.
2. The method of claim 1, wherein the step of the source cell informing the terminal of the priority of the candidate target cell and the handover configuration information of the candidate target cell comprises:
the source cell informs the terminal of the switching configuration information carrying load information; or
The source cell determines the sequence of sending the switching configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and informs the terminal of the switching configuration information of the candidate target cell according to the sequence; or
And the source cell informs the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell.
3. The method of claim 2, wherein the determining, by the source cell, the order of sending the handover configuration information of the candidate target cell according to the priority parameter of the candidate target cell, and notifying, according to the order, the terminal of the handover configuration information of the candidate target cell comprises:
and the source cell determines the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and places the switching configuration information of the alternative target cell in at least one switching reconfiguration message according to the sequence to inform the terminal.
4. The method of claim 2, wherein the notifying, by the source cell, the terminal of the priority parameter of the candidate target cell and the handover configuration information of the candidate target cell comprises:
the source cell sends at least one switching configuration message containing the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a switching reconfiguration message; or
And the source cell sends the switching configuration information containing at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a switching reconfiguration message.
5. The method of claim 2, wherein the source cell determines the priority parameter of the alternative target cell by:
the source cell determines the priority parameter of the candidate target cell according to the switching command information and/or pre-stored information returned by the candidate target cell;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
6. The method of claim 5, wherein the determining, by the source cell, the priority parameter of the candidate target cell according to the handover command information returned by the candidate target cell, comprises:
the source cell analyzes the switching command information returned by the candidate target cell, and obtains the admission degree information of the candidate target cell to the terminal bearing;
and the source cell determines the priority parameter of the candidate target cell according to the admission degree information.
7. A method for performing cell handover, the method comprising:
receiving a switching request message sent by a source cell by an alternative target cell;
and the alternative target cell returns switching command information to the source cell, wherein the switching command information carries load information.
8. A method for performing cell handover, the method comprising:
a terminal receives the priority of an alternative target cell and switching configuration information of the alternative target cell sent by a source cell;
and the terminal selects a target cell to switch according to the priority and the switching configuration information.
9. The method of claim 8, wherein the receiving, by the terminal, the priority of the candidate target cell and the handover configuration information of the candidate target cell sent by the source cell comprises:
the terminal receives switching configuration information carrying load information sent by the source cell; or
The terminal receives switching configuration information sent by the source cell after determining the switching configuration message sequence of the alternative target cell according to the priority parameter; or
And the terminal receives the priority parameter of the alternative target cell and the switching configuration information of the standby target cell, which are sent by the source cell.
10. The method according to claim 9, wherein the priority parameter is determined by the source cell based on handover command information and/or pre-stored information;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
11. The method of claim 9, wherein after the terminal receives the handover configuration information carrying the load information sent by the source cell, the method further comprises:
after the terminal determines that the switching configuration information carries load information, the terminal performs priority ordering on the received switching configuration information of the alternative target cell according to the demodulation information of the switching configuration information;
wherein the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
12. The method of claim 9, wherein the receiving, by the terminal, the handover configuration information sent according to the order after the source cell determines the order of the handover configuration message of the candidate target cell according to the priority parameter includes:
and the terminal receives the switching configuration information sent by the source cell after determining the switching configuration information sequence of the alternative target cell according to the priority parameter through at least one switching reconfiguration message.
13. The method of claim 12, wherein if the terminal receives the handover configuration information sent by the source cell through a handover reconfiguration message, the terminal prioritizes the handover configuration information of the candidate target cells according to an order of receiving the handover configuration information; or
And if the terminal receives the switching configuration information sent by the source cell through a plurality of switching reconfiguration messages, the terminal performs priority sequencing on the switching configuration information of the alternative target cell according to the sequence of receiving the switching reconfiguration messages and the sequence of receiving the switching configuration information in the switching reconfiguration messages.
14. The method of claim 9, wherein the receiving, by the terminal, the handover configuration information of the candidate target cell and the priority parameter of the candidate target cell sent by the source cell comprises:
the terminal receives at least one switching reconfiguration message which is sent by the source cell and contains the switching configuration information of the candidate target cell and the corresponding priority parameter; or
And the terminal receives a switching reconfiguration message which is sent by the source cell and contains switching configuration information of at least one alternative target cell and a corresponding priority parameter list of the target cell.
15. The method of claim 9, wherein after the terminal receives the handover configuration information of the candidate target cell and the priority parameter of the candidate target cell sent by the source cell, the method further comprises:
and the terminal performs priority sequencing on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell.
16. The method of claim 8, wherein the terminal selecting a target cell for handover according to the priority and the handover configuration information comprises:
after the terminal selects a target cell according to the priority and the switching configuration information, judging whether the signal quality of the selected target cell meets a preset condition;
if the preset conditions are met, the terminal initiates a switching process with the target cell, otherwise, the terminal eliminates the selected target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information.
17. The method of claim 16, wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The target cell signal quality is greater than the second threshold and the serving cell signal quality is less than the third threshold.
18. The method of claim 16, wherein if a predetermined condition is satisfied, after the terminal initiates handover with the target cell, the method further comprises:
after the terminal determines that the switching between the terminal and the target cell fails, judging whether the switching failure frequency reaches a threshold value;
and if the target cell reaches the threshold value, the terminal removes the target cell from the alternative target cell and returns to the step of selecting the target cell according to the priority and the switching configuration information, otherwise, the terminal re-initiates the switching process with the target cell.
19. The method of claim 16 or 18, further comprising:
and if the time length of the cell removed from the candidate target cell reaches the preset time length and the terminal is not successfully switched to the target cell, adding the removed cell into the candidate target cell.
20. An apparatus for performing cell handover, the apparatus comprising: a processor, a memory, and a transceiver;
wherein the processor is configured to read the slave program in the memory and execute: after receiving a measurement report reported by a terminal, sending a switching request message to an alternative target cell;
and after receiving the switching command information returned by the candidate target cell, notifying a terminal of the priority of the candidate target cell and the switching configuration information of the candidate target cell so that the terminal selects the target cell according to the priority and the switching configuration information.
21. The device of claim 20, wherein the processor is specifically configured to:
informing the terminal of the switching configuration information carrying the load information; or
Determining the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and informing the terminal of the switching configuration information of the alternative target cell according to the sequence; or
And informing the terminal of the priority parameter of the candidate target cell and the switching configuration information of the candidate target cell.
22. The device of claim 21, wherein the processor is specifically configured to:
and determining the sequence of sending the switching configuration information of the alternative target cell according to the priority parameter of the alternative target cell, and placing the switching configuration information of the alternative target cell in at least one switching reconfiguration message according to the sequence to inform the terminal.
23. The device of claim 21, wherein the processor is specifically configured to:
sending at least one switching configuration message containing the candidate target cell and the priority parameter information corresponding to the candidate target cell to the terminal through a switching reconfiguration message; or
And sending the switching configuration information containing at least one candidate target cell and the priority parameter list corresponding to the candidate target cell to the terminal through a switching reconfiguration message.
24. The apparatus of claim 21, wherein the processor determines the priority parameter of the alternative target cell by:
determining the priority parameter of the candidate target cell according to the switching command information and/or pre-stored information returned by the candidate target cell;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
25. The device of claim 24, wherein the processor is specifically configured to:
analyzing the switching command information returned by the candidate target cell to acquire the admission degree information of the candidate target cell to the terminal bearer;
and determining the priority parameter of the candidate target cell according to the admission degree information.
26. An apparatus for performing cell handover, the apparatus comprising: a processor, a memory, and a transceiver;
wherein the processor is configured to read the slave program in the memory and execute: receiving a switching request message sent by a source cell; and returning switching command information to the source cell, wherein the switching command information carries load information.
27. An apparatus for performing cell handover, the apparatus comprising: a processor, a memory, and a transceiver;
wherein the processor is configured to read the slave program in the memory and execute: receiving the priority of an alternative target cell and switching configuration information of the alternative target cell sent by a source cell; and selecting a target cell for switching according to the priority and the switching configuration information.
28. The device of claim 27, wherein the processor is specifically configured to:
receiving switching configuration information carrying load information sent by the source cell; or
Receiving switching configuration information sent by the source cell after determining the sequence of the switching configuration information of the alternative target cell according to the priority parameter; or
And receiving the priority parameter of the alternative target cell and the switching configuration information of the standby target cell, which are sent by the source cell.
29. The apparatus of claim 28, wherein the priority parameter is determined by the source cell based on handover command information and/or pre-stored information;
wherein the pre-stored information comprises: the candidate target cell load information and/or the candidate target cell access technology information.
30. The device of claim 28, wherein the processor is further configured to:
after determining that the switching configuration information carries load information, carrying out priority sequencing on the received switching configuration information of the alternative target cell according to demodulation information of the switching configuration information;
wherein the demodulation information of the switching configuration information includes part or all of the following:
load information of the candidate target cell, admission degree information of the candidate target cell to the terminal, and access technology information of the candidate target cell.
31. The device of claim 28, wherein the processor is further configured to:
and receiving the switching configuration information sent by the source cell after determining the switching configuration information sequence of the alternative target cell according to the priority parameter through at least one switching reconfiguration message.
32. The apparatus of claim 31, wherein if the processor receives the handover configuration information sent by the source cell through a handover reconfiguration message, the processor prioritizes the handover configuration information of the candidate target cells according to an order of receiving the handover configuration information; or
And if the processor receives the switching configuration information sent by the source cell through a plurality of switching reconfiguration messages, performing priority ordering on the switching configuration information of the alternative target cell according to the sequence of receiving the switching reconfiguration messages and the sequence of receiving the switching configuration information in the switching reconfiguration messages.
33. The device of claim 28, wherein the processor is further configured to:
receiving at least one switching reconfiguration message which is sent by the source cell and contains switching configuration information of the candidate target cell and corresponding priority parameters; or
And receiving a handover reconfiguration message which is sent by the source cell and contains the handover configuration information of at least one candidate target cell and the corresponding priority parameter list of the target cell.
34. The device of claim 28, wherein the processor is further configured to:
and carrying out priority ordering on the switching configuration information of the alternative target cell according to the received priority parameter of the alternative target cell.
35. The device of claim 27, wherein the processor is specifically configured to:
after selecting a target cell according to the priority and the switching configuration information, judging whether the signal quality of the selected target cell meets a preset condition;
if the preset conditions are met, initiating a switching process with the target cell, otherwise, removing the selected target cell from the alternative target cell, and returning to the step of selecting the target cell according to the priority and the switching configuration information.
36. The apparatus of claim 35, wherein the preset conditions include:
the signal quality of the target cell is greater than a first threshold; or
The target cell signal quality is greater than the second threshold and the serving cell signal quality is less than the third threshold.
37. The device of claim 35, wherein the processor is further configured to:
after determining that the switching between the target cell and the target cell fails, judging whether the switching failure frequency reaches a threshold value;
if the target cell reaches the threshold value, the target cell is removed from the alternative target cell, and the step of selecting the target cell according to the priority and the switching configuration information is returned, otherwise, the switching process with the target cell is restarted.
38. The method of claim 35 or 37, wherein the processor is further configured to:
and if the time length of the cell removed from the candidate target cell reaches the preset time length and the cell is not successfully switched to the target cell, adding the removed cell into the candidate target cell.
39. An apparatus for performing cell handover, the apparatus comprising:
the sending module is used for sending a switching request message to the alternative target cell after receiving the measurement report reported by the terminal;
and the notification module is used for notifying the terminal of the priority of the alternative target cell and the switching configuration information of the alternative target cell after receiving the switching command information returned by the alternative target cell so that the terminal can select the target cell according to the priority and the switching configuration information.
40. An apparatus for performing cell handover, the apparatus comprising:
a first receiving module, configured to receive a handover request message sent by a source cell;
and a returning module, configured to return switching command information to the source cell, where the switching command information carries load information.
41. An apparatus for performing cell handover, the apparatus comprising:
a second receiving module, configured to receive the priority of the candidate target cell and the handover configuration information of the candidate target cell, where the priority is sent by the source cell;
and the switching module is used for selecting the target cell to switch according to the priority and the switching configuration information.
42. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 6 or 7 or 8 to 19.
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