CN108882316A - Cell switching method, terminal, base station equipment and communication system - Google Patents
Cell switching method, terminal, base station equipment and communication system Download PDFInfo
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- CN108882316A CN108882316A CN201710326023.5A CN201710326023A CN108882316A CN 108882316 A CN108882316 A CN 108882316A CN 201710326023 A CN201710326023 A CN 201710326023A CN 108882316 A CN108882316 A CN 108882316A
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- 238000004891 communication Methods 0.000 title claims abstract description 37
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 36
- 238000009826 distribution Methods 0.000 claims description 69
- 230000005540 biological transmission Effects 0.000 claims description 41
- 238000005259 measurement Methods 0.000 claims description 39
- 238000002360 preparation method Methods 0.000 claims description 28
- 238000012790 confirmation Methods 0.000 claims description 19
- 238000003860 storage Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 8
- 238000004590 computer program Methods 0.000 description 3
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- 238000007726 management method Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
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- 206010048669 Terminal state Diseases 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
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- 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
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
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- 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
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
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Abstract
The invention discloses a kind of cell switching method, terminal, base station equipment and communication system, this method includes：Terminal judges whether to meet the switching condition switched from being currently located cell to Target cell, wherein, switching condition includes that Radio Link Failure, terminal send that upstream data fails, terminal sends to source base station the failure rate of upstream data in preset duration and is higher than at least one of signal strength that preset threshold, the signal strength of Target cell be currently located higher than terminal cell to the continuous preset times of source base station；When meeting switching condition, terminal sends access request to target BS, and target BS is the base station of Target cell.The present invention is by being arranged a variety of switching conditions, so that switching condition of the terminal when cell switches is more comprehensive, it can more comprehensively reflect the communication conditions between terminal and base station, can more cope with the problems in practical communication scene, improve probability of success when terminal carries out cell switching.
Description
Technical field
The present invention relates to the communications fields, and more particularly, to a kind of cell switching method, terminal, base station equipment and
Communication system.
Background technique
In a wireless communication system, terminal reports signal measurement information to the base station for being currently located cell, by base station according to
The signal measurement information sends cell handover command to terminal, and terminal is switched to neighboring community according to the cell handover command.So
It is generally poor with the radio link quality that is currently located between cell and when terminal is located at cell edge, cause cell to switch
Order is possible to lose, it is possible to and cause terminal that cannot receive and is currently located the cell handover command that the base station of cell is sent,
So as to cause handover failure.
Summary of the invention
In view of this, this application provides a kind of cell switching method, terminal, base station equipment and communication systems, it is intended to mention
High terminal carries out probability of success when cell switching.
In a first aspect, providing a kind of cell switching method, this method includes：Terminal judges whether to meet by being currently located
The switching condition that cell switches to Target cell, wherein the switching condition includes Radio Link Failure, terminal to described current
The continuous preset times in the base station of place cell send upstream data fail, terminal to the base station for being currently located cell pre-
If the failure rate for sending upstream data in duration is higher than preset threshold, the signal strength of the Target cell is higher than the terminal and works as
At least one of the signal strength of preceding place cell；When meeting the switching condition, the terminal is sent to target BS
Access request, the target BS are the base station of the Target cell.In this method, by the way that a variety of switching conditions are arranged, so that
Switching condition of the terminal when cell switches is more comprehensive, can more cope with the problems in practical communication scene, reduces handover failure
Probability.For example, if the signal strength of the Target cell is only higher than the letter that the terminal is currently located cell by terminal
Number intensity is as unique switching condition, it would be possible that appearing in the good enough situation of signal strength that terminal is currently located cell
Under, still there may be uplink signal-channel qualities, and poor, information sends the higher situation of failure rate, and terminal is also required to carry out small at this time
Area's switching.And Radio Link Failure, terminal send that upstream data fails, terminal is to institute to the continuous preset times of the source base station
State source base station sent in preset duration upstream data failure rate be higher than these three switching conditions of preset threshold, can be further
More comprehensively reflect the communication conditions between terminal and base station.
According in a first aspect, the method is also wrapped in the first possible implementation of the cell switching method
It includes：The terminal receive described in be currently located that the base station of cell sends start to judge whether to meet institute for triggering the terminal
State the information of switching condition.After determination has the cell for allowing switching or after determining terminal it is necessary to prepare switching, source base
It stands the information for being sent to terminal and starting to judge whether to meet the switching condition for triggering the terminal, informs that terminal can be opened
Beginning judges switching condition, so that terminal will not start the judgement of switching condition in the cell for not allowing to switch, reduces end
The burden at end reduces the power consumption of terminal.
According to the possible implementation of the first of first aspect or first aspect, the second of the cell switching method
In the possible implementation of kind, the method also includes：The terminal is currently located the finger that the base station of cell is sent described in receiving
Show that information, the instruction information indicate that the target BS is the terminal distribution for accessing the money of the Target cell
Source；The terminal sends access request to target BS：The resource that the terminal is distributed according to the target BS
Access request is sent to the target BS.
Second aspect, provides a kind of cell switching method, and this method includes：Source base station is receiving the small of terminal transmission
After region measurement information, handover preparation request is sent to the base station of each alternative cell；Source base station receives cutting for target BS feedback
Preparation confirmation message is changed, the target BS is the base station of Target cell, and the Target cell is in each alternative cell
The alternative cell for allowing terminal to switch；The source base station is sent out after receiving the switching and preparing confirmation message to the terminal
It send and starts to judge whether to meet the switching condition switched from being currently located cell to the Target cell for triggering the terminal
Information；The switching condition includes that Radio Link Failure, terminal to the continuous preset times of the source base station send upstream data
It is small that the failure rate that failure, terminal send upstream data to the source base station in preset duration is higher than preset threshold, the target
The signal strength in area is higher than the terminal and is currently located at least one of signal strength of cell.Firstly, source base station is in determination
Have after allowing the cell switched or after determining terminal it is necessary to prepare switching, source base station sends described for triggering to terminal
Terminal starts to judge whether to meet the information from being currently located the switching condition that cell switches to the Target cell, informs terminal
It can start to judge switching condition, so that terminal will not start the judgement of switching condition, drop in the cell for not allowing to switch
The low burden of terminal.In addition, by the way that a variety of switching conditions are arranged, so that switching condition of the terminal when cell switches is more complete
Face can more cope with the problems in practical communication scene, reduce the probability of handover failure.
It is described for triggering in the first possible implementation of the cell switching method according to second aspect
The terminal starts to judge whether to meet from the information for being currently located the switching condition that cell switches to the Target cell：
Indicate that the target BS is the instruction information of the resource for accessing the Target cell of the terminal distribution.
According to the possible implementation of the first of second aspect or second aspect, the second of the cell switching method
In the possible implementation of kind, the method also includes：The source base station is after the terminal is successfully accessed or switches, to described
Terminal be successfully accessed or the cell that switches where base station other than other each target BS transmissions be used to indicate release
For the information of the resource of the terminal distribution.So as to which it is small to discharge other targets in time after terminal completes access or switching
The resource in area effectively avoids the wasting of resources of other Target cells.
According to any one implementation of second aspect, or the above second aspect, the of the cell switching method
In three kinds of possible implementations, the method also includes：The source base station is in the cell measurement for receiving terminal transmission
Start timing after information or after having sent the handover preparation request to the target BS；It is default to reach first in timing
When duration, if the source base station does not receive any instruction terminal also and is successfully accessed or is switched to disappearing for the Target cell
Breath, then the source base station sends the information for being used to indicate the resource for being released to the terminal distribution to all target BS.
In this method, timing is carried out by source base station, if terminal is not successfully accessed in preset duration, source base station can notify respectively in time
A target BS is released to the resource in the communication of each Target cell of terminal distribution, discharges the money of each Target cell in time
Source effectively avoids the wasting of resources of each Target cell.
According to any one implementation of second aspect, or the above second aspect, the of the cell switching method
In four kinds of possible implementations, the source base station is to the target BS transmission timing information；The timing information indicates institute
It states target BS and waits the second preset duration for being released to the resource of the terminal distribution.In this method, by by timing information
It is sent to target BS, so that target BS voluntarily timing and can discharge resource, source base station is not needed and issues a separate notice that it is released again
Put resource.
The third aspect, provides a kind of cell switching method, and this method includes：Source base station is in the cell for receiving terminal transmission
After metrical information, handover preparation request is sent to the base station of alternative cell；The switching that source base station receives target BS feedback prepares
Confirmation message, the target BS are the base station of Target cell, and the Target cell is to allow eventually in each alternative cell
Hold the alternative cell of switching；The source base station is successfully accessed or cuts after the terminal is successfully accessed or switches, to the terminal
Other each target BS transmissions other than base station where the cell changed, which are used to indicate, is released to the terminal distribution
The information of resource.So as to discharge failed access terminal or switching terminal in time after terminal completes access or switching
The resource of Target cell effectively avoids the wasting of resources of the Target cell of failed access or switching terminal.
According to the third aspect, in the first possible implementation of the cell switching method, this method further includes：
Source base station after the cell measurement information for receiving terminal transmission or is sending the switching to the target BS
Start timing after preparation request；When timing duration reaches the first preset duration, if source base station does not receive also described in any instruction
Terminal is successfully accessed or is switched to the message of the Target cell, then the source base station is used for all target BS transmissions
Indicate the information for being released to the resource of the terminal distribution.In this method, timing is carried out by source base station, if terminal is not when default
It is successfully accessed in length, then source base station can notify each target BS to be released to the logical in each Target cell of terminal distribution in time
The resource of letter, discharges the resource of each Target cell in time, effectively avoids the wasting of resources of each Target cell.
According to the possible implementation of the first of the third aspect or the third aspect, the second of the cell switching method
In the possible implementation of kind, this method further includes：Source base station is to the target BS transmission timing information；The timing information
Indicate that the target BS waits the second preset duration for being released to the resource of the terminal distribution.In this method, by that will determine
When information be sent to target BS, so that target BS voluntarily timing and can discharge resource, do not need source base station and separately lead to again
Know that it discharges resource.
According to the first of the third aspect or the third aspect and second of possible implementation, in the cell switching side
In the third possible implementation of method, the method also includes：When timing duration reaches the first preset duration, if described
Terminal is not successfully accessed or is switched to any Target cell in the timing stage, then the source base station is again to the base station of alternative cell
Send handover preparation request；Wherein, first preset duration meets, timer expiration moment and the timing information or described fixed
When information indicate at the time of it is consistent.
It is understood that the of the first possible implementation of the above-mentioned third aspect, the third aspect, the third aspect
The third possible implementation of two kinds of possible implementations and the third aspect, can be used as an independent scheme
It is individually performed, can also be combined with each other execution.
Fourth aspect, provides a kind of cell switching method, and this method includes：Target BS receives the instruction that source base station is sent
It is released to the information of the resource of the terminal distribution；The target BS is released to the resource of the terminal distribution.
According to fourth aspect, in the first possible implementation of the cell switching method, this method further includes：
The target BS is terminal distribution resource；Target BS starts timing；When timing duration reaches the second preset duration, if institute
It states target BS and does not receive the access request that the terminal is sent in the timing stage, then the target BS is released to the end
Hold the resource of distribution.
According to the possible implementation of the first of fourth aspect or the third aspect, the second of the cell switching method
In the possible implementation of kind, this method further includes that the target BS receives the timing information that the source base station is sent, described
Timing information indicates second preset duration.
It is understood that the first possible implementation and fourth aspect of above-mentioned fourth aspect, fourth aspect
Second of possible implementation, can be used as an independent scheme and be individually performed, can also be combined with each other execution.
5th aspect, provides a kind of terminal, which includes processor and transceiver, and the processor is for judgement
It is no to meet the switching condition switched from being currently located cell to Target cell, wherein the switching condition includes that Radio Link loses
It loses, terminal sends that upstream data fails, terminal is to being currently located cell to the continuous preset times in the base station that is currently located cell
Base station send the failure rate of upstream data in preset duration and be higher than preset threshold, the signal strength of the Target cell and be higher than
The terminal is currently located at least one of signal strength of cell；The transceiver is for meeting the switching condition
When, access request is sent to target BS, the target BS is the base station of the Target cell.The terminal is a variety of by being arranged
Switching condition can more cope with the problems in practical communication scene so that switching condition of the terminal when cell switches is more comprehensive,
Reduce the probability of handover failure.For example, if terminal is only current higher than the terminal by the signal strength of the Target cell
The signal strength of place cell is as unique switching condition, it would be possible that appearing in the signal strength that terminal is currently located cell
In the case where getting well enough, still there may be uplink signal-channel qualities, and poor, information sends the higher situation of failure rate, at this time terminal
It is also required to carry out cell switching.And Radio Link Failure, terminal are equal to the continuous preset times transmission upstream data of the source base station
The failure rate that failure, terminal send upstream data to the source base station in preset duration is higher than these three switching items of preset threshold
Part further more can comprehensively reflect the communication conditions between terminal and base station.
6th aspect, provides a kind of base station equipment, the base station equipment includes processor and transceiver；The transceiver
For receiving the cell measurement information of terminal transmission；The processor is used to receive the cell measurement letter in the transceiver
After breath, the transceiver is controlled to the base station of each alternative cell and sends handover preparation request；The transceiver is also used to receive
The switching of target BS feedback prepares confirmation message, and the target BS is the base station of Target cell, and the Target cell is institute
State the alternative cell for allowing terminal to switch in each alternative cell；The processor is also used to receive in the transceiver described
Switching prepare confirmation message after, control the transceiver to the terminal send first for trigger the terminal start judgement be
The no information met from being currently located the switching condition that cell switches to the Target cell；The switching condition includes radio chains
Road failure, terminal send upstream data failure, terminal to the base station equipment pre- to the continuous preset times of the base station equipment
If the failure rate for sending upstream data in duration is higher than preset threshold, the signal strength of the Target cell is higher than the terminal and works as
At least one of the signal strength of preceding place cell.
7th aspect, provides a kind of base station equipment, the base station equipment includes processor and transceiver；Processor is used for
After the cell measurement information for receiving terminal transmission, control transceiver sends handover preparation request to the base station of alternative cell；
The switching that the transceiver is also used to receive target BS feedback prepares confirmation message, and the target BS is the base of Target cell
It stands, the Target cell is the alternative cell for allowing terminal to switch in each alternative cell；The processor is also used to
After the terminal is successfully accessed or switches, control transceiver to the cell that the terminal is successfully accessed or is switched where base station with
Outer other each target BS send the information for being used to indicate the resource for being released to the terminal distribution.
According to the 7th aspect, in the first possible implementation of the base station equipment, the processor is also used to
It is asked after the cell measurement information for receiving terminal transmission or having sent the switching preparation to the target BS
Start timing after asking；When timing duration reaches the first preset duration, if transceiver do not receive also any instruction terminal at
Function accesses or is switched to the message of the Target cell, then the transceiver is also used to be used for all target BS transmissions
Indicate the information for being released to the resource of the terminal distribution.
It is understood that the first possible implementation of above-mentioned 7th aspect and the 7th aspect, can be used as
One independent scheme is individually performed, and can also be combined with each other execution.
Eighth aspect, provides a kind of base station equipment, and the base station equipment includes processor and transceiver；Transceiver is used for
Receive the information that the instruction that source base station is sent is released to the resource of the terminal distribution；Processor is for being released to the terminal point
The resource matched.
According to eighth aspect, in the first possible implementation of the base station equipment, the processor is also used to
For terminal distribution resource；Processor is also used to start timing；When timing duration reaches the second preset duration, if the transceiver
The access request that the terminal is sent is not received in the timing stage, then the processor is released to the money of the terminal distribution
Source.
It is understood that the possible implementation of the first of above-mentioned eighth aspect and eighth aspect, can be used as
One independent scheme is individually performed, and can also be combined with each other execution.
Another aspect of the present invention provides a kind of communication system, which includes terminal and base described in aspect above
Station equipment.
Another aspect of the present invention provides a kind of computer readable storage medium, the computer readable storage medium
In be stored with computer software instructions used in above-mentioned terminal, when run on a computer so that computer execute it is above-mentioned
Method described in various aspects.
Another aspect of the present invention provides a kind of computer readable storage medium, the computer readable storage medium
In be stored with computer software instructions used in above-mentioned base station equipment, when run on a computer so that computer execute
Method described in above-mentioned various aspects.
Detailed description of the invention
Fig. 1 is the exemplary schematic representation according to the communication system of one embodiment of the invention；
Fig. 2 is the exemplary flow chart according to the cell switching method of one embodiment of the invention；
Fig. 3 is another exemplary flow chart according to the cell switching method of one embodiment of the invention；
Fig. 4 is the another exemplary flow chart according to the cell switching method of one embodiment of the invention；
Fig. 5 is another exemplary flow chart according to the cell switching method of one embodiment of the invention；
Fig. 6 is the exemplary hardware configuration schematic diagram according to the terminal of one embodiment of the invention；
Fig. 7 is the exemplary hardware configuration schematic diagram according to the base station equipment of one embodiment of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and the technical solution of the embodiment of the present invention is described.
The technical solution of the embodiment of the present invention described below can be applied to communication system.The communication system can wrap
At least one base station, and the terminal device at least one base station communication are included, can also be communicated between base station.
Base station can be GSM (Global System for Mobile Communication, global mobile communication system
System) or CDMA (Code Division Multiple Access, CDMA) network in BTS (Base Transceiver
Station, base transceiver station), be also possible to WCDMA (Wideband Code Division Multiple Access, it is wide
With CDMA) in NB (NodeB), can also be eNB in LTE (Long Term Evolution, long term evolution) or
ENodeB (Evolutional NodeB), can also be the base station in the following 5G network, base station in future communication systems etc..
Terminal can be UE (User Equipment, user equipment), access terminal, subscriber unit, subscriber station, movement
It stands, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless telecom equipment, user agent or user
Device etc..Access terminal can be cellular phone, wireless phone, SIP (Session Initiation Protocol, session initiation
Dynamic agreement) phone, WLL (Wireless Local Loop, wireless local loop) stand, PDA (Personal Digital
Assistant, personal digital assistant), the handheld device with wireless communication function, calculate equipment or be connected to wireless-modulated solution
Adjust other processing equipments, the mobile unit, wearable device of device, the terminal etc. in the following 5G network.
Fig. 1 is an example of the communication system, and communication system shown in FIG. 1 includes three base stations and a terminal.Often
A base station includes at least one cell.For example, the present invention is described so that each base station includes three cells as an example.It below will be whole
The base station that end is currently located cell is known as source base station.
The embodiment of the present invention provides a kind of cell switching method, as shown in Fig. 2, first in the cell switching method is real
It applies in example, this method includes：
S100, terminal carry out signal measurement to cell and neighboring community is currently located.
Terminal can measure the signal strength of reference signal, can also survey to the signal strength of synchronization signal
Amount.
S101, terminal is to source base station report measurement information.Source base station is the base station that terminal is currently located cell.
In one embodiment, terminal can periodically to be currently located cell and neighboring community carry out signal measurement and on
Report metrical information.
In another embodiment, trigger event can also be pre-defined, when trigger event meets, then terminal is to current
Place cell and neighboring community carry out signal measurement and report measurement information.Trigger event can detect current area for terminal
Signal strength is close to adjacent cell signal strength.
In another embodiment, it can also be examined by being currently located the base station triggers of cell in the base station for being currently located cell
Measure communication quality between terminal it is bad when, then can carry out signal measurement with triggering terminal and report.
Metrical information can be there are two types of form：
1, the metrical information includes the signal measurement result for being currently located cell and the signal measurement result of neighboring community.Tool
Body, may include current cell identification and current cell signal measurement result corresponding relationship and neighboring community mark with
The corresponding relationship of neighbor cell signal measurement result.Signal measurement result can be signal strength, for example, can be for reference letter
Number measurement signal strength, be also possible to synchronization signal measure signal strength.
2, terminal can not also be reported to source base station is currently located the signal measurement result of cell and the signal of neighboring community
Measurement result.Terminal can be determined if need to switch over, will be needed in terminal determination voluntarily according to measurement result
When switching over, to source base station report measurement information.Terminal will close to cell edge, or when close to a certain condition,
Then it is believed that the terminal will need to switch over.The terminal can also be according to the signal measurement result and phase for being currently located cell
The signal measurement result of adjacent cell determines that the cell that may allow to switch, the metrical information include in each neighboring community
Each mark that may allow the cell switched or the metrical information include being used to indicate each cell that may allow to switch
Instruction information.
Terminal can calculate between the signal strength for being currently located cell of measurement and the signal strength of each neighboring community
Difference (difference can for positive number, zero or negative), find out in each difference of calculating be less than preset threshold (preset threshold
Can be positive number) difference, and the corresponding neighboring community of each difference found out is determined as may allowing the cell switched.Or
Person, terminal can also be when sending upstream data continuously unsuccessfully preset number, and the signal in each neighboring community of measurement is strong
In degree, maximum top n signal strength is found out, and the corresponding neighboring community of this N number of signal strength found out is determined as possibility
Allow the cell switched.For example, N can be greater than or equal to 1.N can be configured according to actual needs, it is not limited here.
It may include subordinate in the cell that may allow to switch when source base station manages multiple cells (such as three)
In the cell of source base station.Each cell in the cell switched in addition to the cell for being subordinated to source base station will likely be allowed to claim below
For alternative cell.The cell for being subordinated to source base station in cell that will likely allow to switch is known as cell in alternative stand.
S102, source base station receive metrical information.
S103, source base station determine alternative cell according to metrical information in each neighboring community.
When the metrical information uses above-mentioned form 1, i.e., metrical information includes being currently located the signal measurement result of cell
When with the signal measurement result of neighboring community, source base station can be identical using the cell that may allow to switch with above-mentioned terminal determination
Mode in each neighboring community determination may allow switch cell, details are not described herein.Wherein, with terminal according to transmission
The continuous frequency of failure of upstream data determines unlike the mode of alternative cell that source base station is continuous to terminal transmission downlink data
When the preset number of failure, in the signal strength of each neighboring community, maximum top n signal strength is found out, and will find out
The corresponding neighboring community of this N number of signal strength be determined as the cell that may allow to switch.In turn, source base station will likely allow to cut
Each cell in the cell changed in addition to the cell for being subordinated to source base station is determined as alternative cell.
Source base station can be will likely allow the cell for being subordinated to source base station in the cell switched to be determined as in alternatively station
Cell.
It when the metrical information uses above-mentioned form 2, that is, include the mark of each cell that may allow to switch, or packet
When including the instruction information for being used to indicate each cell that may allow to switch, then source base station will likely can directly allow to switch
Each cell in cell in addition to the cell for being subordinated to source base station is determined as alternative cell.Source base station can be will likely allow
The cell for being subordinated to source base station in the cell of switching is determined as interior cell of alternatively standing.
Following embodiment is first described for alternative cell, is then described again for cell in alternative stand.
S104, source base station send handover preparation request to the base station of each alternative cell.
The handover preparation request instruction terminal will may need to be switched to the alternative cell, need the base station of alternative cell
It is used to access the resource of alternative cell for terminal distribution.
In one embodiment, the multiple cells of each BTS management (such as three), which also can indicate that
Terminal may the alternative cell that will need to switch be which cell under the base station, for example, the handover preparation request can be with
Indicate the mark of each alternative cell.
S105, the base station of each alternative cell receives the handover preparation request that source base station is sent, and determines whether this
Terminal switches to the corresponding alternative cell of the handover preparation request.
In one embodiment, the base station of each alternative cell can work as according to the corresponding alternative cell of the handover preparation request
Preceding load determines whether that the terminal is allowed to switch to the alternative cell.It the base station of each alternative cell can also be according to alternative
The radio resource utilization power of cell, each network element load, the QOS situation of already-existing session and the radio resource newly applied QoS
It is required that etc. determine whether that the terminal is allowed to switch to the alternative cell.
The alternative cell for allowing terminal to switch in each alternative cell is known as Target cell below, and by Target cell institute
Base station be known as target BS.
S106, when determining allows terminal to switch, target BS is the terminal distribution for accessing the Target cell
Resource.
Target BS is that the resource of terminal distribution includes running time-frequency resource.Terminal can use running time-frequency resource transmission and connect at random
Enter signaling.Target BS is that the resource of terminal distribution can also include preamble index (Preamble index) etc..
S107, target BS feed back switching to the source base station and prepare confirmation message.
The switching prepares confirmation message and informs that source base station allows terminal to switch.
In one embodiment, which, which prepares confirmation message, can indicate the alternative cell for allowing to switch, i.e. Target cell.
For example, switching, which prepares confirmation message, can carry the mark of Target cell.
In another embodiment, it can also include the use that instruction target BS is terminal distribution which, which prepares confirmation message,
In the information of the resource of access Target cell.
Alternatively, target BS can also indicate that target BS is the use of terminal distribution additionally by an individual message
In the resource of access Target cell.
When determining does not allow terminal to switch, the base station for the alternative cell for not allowing terminal to switch can be fed back to source base station
Corresponding instruction information, to inform that the source base station alternative cell does not allow to switch；Or instruction information can not also be fed back.
S108, the switching that source base station receives target BS feedback prepare confirmation message.
In one embodiment, source base station can also receive the use that the instruction target BS of target BS feedback is terminal distribution
In the information of the resource of access Target cell.
To which source base station has known that target BS is terminal distribution for accessing the resource of Target cell.
S109, source base station can be sent to terminal to be started to judge whether to meet the switching condition for triggering the terminal
Information.
In one embodiment, described to start to judge whether to meet from being currently located cell to described for triggering the terminal
The information of switching condition of Target cell switching includes：Indicate that the target BS is the described for accessing of the terminal distribution
The instruction information of the resource of Target cell.After terminal receives above-mentioned instruction information, begin to judge whether the switching condition obtains
To satisfaction.
In another embodiment, described to start to judge whether to meet from being currently located cell to institute for triggering the terminal
The information for stating the switching condition of Target cell switching may include that the instruction information of such as 1 bit (can also be in other embodiments
For multiple bits).Terminal begins to judge whether the switching condition is expired after the instruction information for receiving above-mentioned 1 bit
Foot.It is described to start to judge whether to meet the switching switched from being currently located cell to the Target cell for triggering the terminal
The information of condition can also also comprise other than including the instruction information of for example above-mentioned 1 bit and be used to indicate the target
Base station is the information of the resource for accessing the Target cell of the terminal distribution.
S110, what terminal reception source base station was sent starts to judge whether to meet the switching condition for triggering the terminal
Information.
In one embodiment, terminal can start to judge whether to meet the switching according to described for triggering the terminal
The information of condition determines that target BS is the terminal distribution for accessing the resource of the Target cell.Control letter is saved
The expense in road.
Alternatively, in another embodiment, terminal starts to judge in addition to what reception source base station was sent for triggering the terminal
Except the information for whether meeting the switching condition, the instruction information of source base station transmission can also be received.Terminal can root
Determine that target BS is the terminal distribution for accessing the resource of the Target cell according to the instruction information.
Terminal is being received for triggering after the terminal starts to judge whether to meet the information of the switching condition, then is opened
Begin to execute step S111.
In the present invention, after the determining cell for having and allowing to switch, source base station sends to terminal and opens for triggering the terminal
The information for beginning to judge whether to meet the switching condition, informs that terminal can star judgement switching condition, so that terminal will not be
When the cell for not allowing to switch, the burden and power consumption of terminal are reduced.
Step S111, terminal judge whether to meet the switching condition switched from being currently located cell to Target cell, wherein
The switching condition includes that Radio Link Failure (RLF, Radio Link Failure), terminal are continuously preset to the source base station
Number transmission upstream data fails, terminal sends the failure rate of upstream data to the source base station higher than pre- in preset duration
If threshold value, the signal strength of the Target cell, which are higher than the terminal, is currently located at least one of signal strength of cell.
In one embodiment, when meeting any one in above four kinds of conditions, then terminal be judged to meeting described in cut
Change condition.
The present embodiment is by being arranged a variety of switching conditions, so that switching condition of the terminal when cell switches is more comprehensive,
The problems in practical communication scene can be more coped with, the probability of handover failure is reduced.For example, if terminal is only small by the target
The signal strength in area is higher than the terminal and is currently located the signal strength of cell as unique switching condition, it would be possible that occurring
In the case where the signal strength that terminal is currently located cell is good enough, poor, information that still there may be uplink signal-channel qualities
The higher situation of failure rate is sent, terminal is also required to carry out cell switching at this time.And Radio Link Failure, terminal are to the source base
The continuous preset times of standing send that upstream data fails, terminal sends the mistake of upstream data to the source base station in preset duration
Rate is lost higher than these three switching conditions of preset threshold, further more can comprehensively reflect the communication shape between terminal and base station
Condition.
In one embodiment, preset times for example can be set to 3 times, it is 4 inferior, can specifically carry out according to actual needs
Setting, it is not limited here.For 3 times, when sending upstream data at terminal continuous 3 times to source base station and fail, then it is assumed that
Meet switching condition.
In one embodiment, preset duration and preset threshold can also be flexibly arranged according to actual needs, herein
Without limitation.Failure rate can be terminal sends upstream data failure to source base station in preset duration number and terminal to source
Base station sends the ratio between the total degree of upstream data.
Step S112, when meeting the switching condition, the terminal sends access request to target BS.
In one embodiment, when Target cell is at least two, terminal can choose a top-quality Target cell,
And access request is sent for the Target cell.
In one embodiment, the terminal is sent with specific reference to the resource that the target BS distributes to the target BS
Access request.
In one embodiment, terminal completes the initial access of Target cell by the resource that target BS distributes.
Terminal is completed after being initially accessed, can be from the target BS where the Target cell for completing to be initially accessed to source base station
The message that feedback instruction terminal is successfully accessed.Alternatively, the message can also be fed back from terminal to source base station.
After source base station receives the message that the instruction terminal is successfully accessed, the letter such as user's context is sent to target BS
Breath, then source base station discharges the information such as user's context.Target BS receives the information such as the user's context, so that terminal is complete
At cell switching.
It in one embodiment, can be as the mesh where terminal or the Target cell of completion switching after terminal completes switching
Mark message of the base station to source base station feedback instruction terminal successful switch.
It should be noted that when including cell in the alternative station in the cell of source base station management, specifically, source base station
Load that can be current according to cell in the alternative station, determines whether that the terminal is allowed to switch to cell in the alternative station.
Source base station can also be according to the service quality of the radio resource utilization power of alternative cell, each network element load, already-existing session
(Quality of Service, QoS) situation and the qos requirement for the radio resource newly applied etc. determines whether to allow the terminal
Switch to cell in the alternative station.
Cell in the alternative station for allowing terminal to switch in cell in each alternative station can be known as cell in Target Station.
Source base station can be used to access the resource of cell in the Target Station for terminal distribution.The resource is referred to above-mentioned
For accessing the resource of Target cell, details are not described herein.
Further, based on the above embodiment, the sum of cell is in the above-mentioned Target cell and Target Station for allowing switching
When at least two, if terminal is successfully accessed or switches to cell in one of Target cell or any one Target Station,
Cell is that the resource of terminal distribution should discharge in time in the Target cell and Target Station of so non-access terminal, otherwise can be made
At the waste of resource.
The source base station is after the terminal is successfully accessed or switches, the cell institute that is successfully accessed or switches to the terminal
Base station other than other each target BS send and be used to indicate the information of the resource for being released to the terminal distribution.
In one embodiment, if the cell that terminal is successfully accessed or switches is cell in the Target Station, source base station is not
Other instruction information instruction terminals are needed to be successfully accessed or switch, source base station can directly determine terminal and be successfully accessed or switch.
In another embodiment, if terminal is successfully accessed or the cell that switches is the Target cell, source base station can be with
Receive the message for being used to indicate the terminal and being successfully accessed or be switched to the Target cell of terminal or target BS transmission.?
After receiving the message, then source base station can determine that the terminal is successfully accessed or switches.
The embodiment of several release resources introduced below：
1, when the cell that terminal accesses or switches is cell in Target Station：
If there is also cell in the Target Station not accessed by terminal, source base station be released to automatically terminal distribution for connecing
Enter the resource of cell in the Target Station not accessed by terminal.
Source base station can also send to other each target BS and be used to indicate the resource for being released to the terminal distribution
Information.After target BS receives the information, then the resource of terminal distribution is released to.
2, when the cell that terminal accesses or switches is Target cell, source base station can be released to the use of terminal distribution automatically
In the resource of cell in access Target Station, target BS is the delivery mode of the resource for accessing Target cell of terminal distribution
It is as follows：
Embodiment one, allow switch Target cell in contain at least two belong to same target BS target it is small
Qu Shi, for example, two Target cells C1 and C2 belong to the same target BS B1.If terminal is successfully accessed or switches to C1,
Target BS can directly be released to the resource in Target cell C2 communication of terminal distribution.
Embodiment two, such as Fig. 3, when target BS is at least two, this method further includes：
Step S113, the source base station are successfully accessed or are switched to the Target cell receiving the instruction terminal
After message, to the target BS for the Target cell that the terminal is successfully accessed or is switched other than other each target BS
Send the information for being used to indicate the resource for being released to the terminal distribution.
Step S114, target BS receive the information that the instruction that source base station is sent is released to the resource of the terminal distribution,
And it is released to the resource of terminal distribution.
In one embodiment, after terminal is successfully accessed or is switched, the target base that can be successfully accessed or be switched by terminal
It stands and sends the message for indicating that the terminal is successfully accessed or is switched to the Target cell to source base station.In another embodiment,
The message that the instruction terminal was successfully accessed or was switched to the Target cell can also be sent from terminal to source base station.
For example, the Target cell switched is allowed to include C1 and C2, C1 belongs to target BS B1, and C3 belongs to target BS B2.
If terminal is successfully accessed or switches to one of Target cell, such as C1, then source base station can notify target BS B2 to release
The resource in C3 communication for terminal distribution is put, so as to discharge other targets in time after terminal completes access or switching
The resource of cell effectively avoids the wasting of resources of other Target cells.
Embodiment three, such as Fig. 4, this method further includes：
Step S115, the source base station start timing；It is understood that at the time of timing shown in Fig. 4 starts only
It is an example, the execution moment of step S115 is also possible to other moment after step S101.
Step S116, when timing reaches the first preset duration, if the source base station does not receive any instruction end also
End is successfully accessed or is switched to the message of the Target cell, then the source base station is sent to all target BS for referring to
Show the information for being released to the resource of the terminal distribution.In addition, source base station is also certainly when timing duration reaches the first preset duration
The dynamic resource for being used to access cell in Target Station for being released to terminal distribution.
In the present embodiment, terminal may not be able to satisfy always switching condition, and therefore, terminal may fail always to execute
The step S112.May also terminal meet switching condition, i.e., terminal performs the step S112, but terminal fails into
Function completes access or switching.
In one embodiment, source base station can start to count after having sent the handover preparation request to the target BS
When；Alternatively, source base station starts timing after can also waiting certain duration after having sent handover preparation request to target BS,
At this point, the duration that source base station waits can be equal to the duration that target BS received and parsed the handover preparation request；Alternatively, source base
Timing can also be started after receiving the metrical information that terminal reports by standing.
First preset duration can be configured according to actual needs, it is not limited here.First preset duration is whole enough
Complete the time of access or switching in end.
If terminal cannot will access always cell in Target cell or Target Station since switching condition does not meet always,
Therefore it needs cell in Target cell and Target Station to reserve resource always, will cause serious waste.In the present embodiment, by
Source base station carries out timing, if terminal is not successfully accessed in preset duration, source base station can notify each target BS in time
It is released to the resource in the communication of each Target cell of terminal distribution, the resource of each Target cell is discharged in time, effectively keeps away
The wasting of resources of each Target cell is exempted from.And source base station can also be released to the small in Target Station for accessing of terminal distribution
The resource in area effectively avoids the wasting of resources of cell in Target Station.
Embodiment four, such as Fig. 5, this method further includes：
Step S117, the source base station is to the target BS transmission timing information；The timing information indicates the mesh
Mark base station waits the second preset duration for being released to the resource of the terminal distribution.It is understood that source base station shown in fig. 5
Only example at the time of to each target BS transmission timing information.Handover preparation request carries the timing information,
Alternatively, the timing information can also be sent independently of handover preparation request.
Step S118, the target BS start timing after receiving timing information, or in target BS to source base
Timing can also be started at other moment by starting timing or target BS after transmission switching preparation confirmation message of standing；In timing
When duration reaches the second preset duration, if the terminal fails in the case where the timing stage is successfully accessed or switches to the target BS
Target cell, then the target BS is released to the resource of the terminal distribution.
In the present embodiment, terminal may not be able to satisfy always switching condition, and therefore, terminal may fail always to execute
The step S112.May also terminal meet switching condition, i.e., terminal performs the step S112, but terminal fails into
Function completes access or switching.As shown in figure 5, terminal is not successfully accessed or switches to two targets in Fig. 5 within the timing stage
Base station, therefore the two base stations are performed both by step S118.
In present embodiment, by the way that timing information is sent to target BS, so that target BS can voluntarily timing be simultaneously
Discharge resource, do not need source base station issue a separate notice again its discharge resource.
In one embodiment, source base station can be synchronous with the timing of target BS.First preset duration and second it is default when
Length can be identical, can not also be identical, as long as can guarantee identical at the time of source base station and target BS terminate timing.Example
Such as, source base station can be in nth frame transmission timing information.A kind of mode is that source base station can start timing, and first in nth frame
Preset duration is assumed to be 10 frames, and target BS completes the parsing to timing information in N+4 frame, and starts to count in N+4 frame
When, the second preset duration is assumed to be 6 frames, then source base station and target BS complete timing in the 10th frame.Another way is：Source
Base station can start timing in N+4 frame, and the first preset duration and the second preset duration are 6 frames, then source base station and target base
It stands and completes timing in the 10th frame.
If terminal does not complete access or switching, source base station can start controlling terminal switching cell next time in time
Process (such as restarts to receive the metrical information of terminal, and redefines target BS), and target BS can also be same
Moment discharges resource, and the consistency of source base station and target BS is effectively guaranteed.
It should be noted that can be combined with each other between the embodiment of above-mentioned each release resource.
It is understood that the source base station in above-mentioned each embodiment can also be used as the target base of other handoff procedures
It stands.Target BS in above-mentioned each embodiment can also be used as the source base station of other handoff procedures.
Embodiment five, unlike embodiment four, source base station is not needed to target BS transmission timing information, mesh
Mark base station can voluntarily determine timing length, and target BS can start timing after distributing resource, and reach in timing length
When, if discovery terminal does not access yet, voluntarily discharge resource.Any information is sent without source base station, target BS is
Resource can be voluntarily discharged, the burden of source base station is reduced.
The present invention also provides a kind of terminal 100, which can be the terminal of above-described embodiment description.Such as Fig. 6 institute
Show, which includes processor 110 and transceiver 120, and processor 110 is connected with transceiver 120.Optionally, the terminal
100 further include memory 130.Memory 130 is respectively connected with processor 110 and transceiver 120.It is further alternative, the end
End 100 further includes bus system 140.Wherein, processor 110, transceiver 120 and memory 130 can pass through bus system 140
It is connected.The memory 140 can be used for store instruction, which is used to execute the instruction of the memory 140 storage, with
Control transceiver 120 sends and receivees signal；The memory 140, which can be also used for caching the processor 110, to be executed instruction
The data generated in journey.
Wherein, the processor 110 is for judging whether to meet the switching item switched from being currently located cell to Target cell
Part, wherein the switching condition includes Radio Link Failure, terminal 100 to the continuous preset times in base station for being currently located cell
Send that upstream data fails, terminal 100 sends the failure of upstream data to the base station for being currently located cell in preset duration
Rate is higher than preset threshold, the signal strength of the Target cell is higher than the terminal 100 and is currently located in the signal strength of cell
At least one；
The transceiver 120 is used for when meeting the switching condition, sends access request, the target base to target BS
It stands as the base station of the Target cell.
From above-described embodiment as can be seen that terminal shown in fig. 6 100 executed is step in above method embodiment
S100, S101, S110, S111 and S112.Specifically, processor 110 executes the step S100 and S111 in embodiment of the method.It receives
Send out step S101, step S110 and the step S112 in the execution embodiment of the method for device 120.Processor 110 and transceiver 120 execute
The associated description of more details when above-mentioned steps during reference can be made to the above method embodiment, details are not described herein again.
In the embodiment of the present invention, by the way that a variety of switching conditions are arranged, so that switching condition of the terminal 100 when cell switches
More comprehensively, the problems in practical communication scene can be more coped with, the probability of handover failure is reduced.For example, if terminal 100 only
The signal strength of the Target cell is higher than the terminal 100 and is currently located the signal strength of cell as unique switching item
Part, it would be possible that appear in terminal 100 be currently located the signal strength of cell it is good enough in the case where, still there may be uplinks
Channel quality is poor, information sends the higher situation of failure rate, and terminal 100 is also required to carry out cell switching at this time.And radio chains
Road failure, terminal 100 send that upstream data fails, terminal 100 is to the source base station to the continuous preset times of the source base station
The failure rate that upstream data is sent in preset duration is higher than these three switching conditions of preset threshold, can further more comprehensively
Reflection terminal 100 and base station between communication conditions.
The other function of the processor 110, transceiver 120 is referred to accordingly implement in above-mentioned cell switching method
The description of example, details are not described herein.
The present invention also provides a kind of base station equipments 200.As shown in fig. 7, the base station equipment 200 includes processor 210 and receives
Device 220 is sent out, processor 210 is connected with transceiver 220.Optionally, which further includes memory 230.Memory
230 are respectively connected with processor 210 and transceiver 220.Further alternative, which further includes bus system
240.Wherein, processor 210, transceiver 220 and memory 230 can be connected by bus system 240.The memory 240 can
Instruct for storage, the processor 210 be used for execute the memory 240 storage instruction, with control transceiver 220 receive and
Send signal；The memory 240 can be also used for caching the data that the processor 210 generates during executing instruction.
Wherein, when base station equipment 200 is used as above-mentioned source base station：
The transceiver 220 is used to receive the cell measurement information of the transmission of terminal 100；
Processor 210 is used for after the transceiver 220 receives the cell measurement information, controls the transceiver
220 send handover preparation request to the base station of each alternative cell；
The switching that the transceiver 220 is also used to receive target BS feedback prepares confirmation message, and the target BS is
The base station of Target cell, the Target cell are the alternative cell for allowing terminal to switch in each alternative cell；
Processor 210 is also used to after the transceiver 220 receives the switching preparation confirmation message, controls transceiver
220 start to judge whether to meet from being currently located cell to the target to the terminal 100 transmission for triggering the terminal
The information of the switching condition of cell switching；
The switching condition includes Radio Link Failure, terminal in the transmission of the base station equipment 200 continuous preset times
Row data failure, terminal sent in preset duration to the base station equipment 200 upstream data failure rate be higher than preset threshold,
The signal strength of the Target cell is higher than the terminal and is currently located at least one of signal strength of cell.Firstly, base
Station equipment 200 determine have allow the cell switched after or after determining terminal it is necessary to prepare switching, send the to terminal
One instruction information, inform terminal can start judge switching condition so that terminal will not do not allow switching cell when or
Person will not be not necessarily to execute the judgement of starting switching condition when cell switches, and reduce the burden of terminal.In addition, by setting
A variety of switching conditions are set, so that switching condition of the terminal when cell switches is more comprehensive, can more be coped in practical communication scene
The problem of, reduce the probability of handover failure.
In another embodiment, the processor 210 is also used to：After the terminal 100 is successfully accessed or switches, control
Other each mesh other than base station where from the transceiver 220 to the cell that the terminal 100 is successfully accessed or is switched
Mark base station sends the information for being used to indicate and being released to the resource that the terminal 100 is distributed.So as to terminal complete access or
After switching, release in time by the resource for the Target cell that terminal accesses or switches, does not avoid the resource of Target cell effectively
Waste.
In another embodiment, the processor 210 is also used to：The transmission of terminal 100 is received in the transceiver 220
After cell measurement information or after the transceiver 220 has sent the handover preparation request to the target BS, starting
Timer starts timing；When timing reaches the first preset duration, if the transceiver 220 does not receive any instruction end also
End 100 is successfully accessed or is switched to the message of the Target cell, then the processor 210 is also used to control the transceiver
220 send the information for being used to indicate the resource for being released to the terminal distribution to all target BS.In this method, by base
Station equipment 200 carries out timing, if terminal is not successfully accessed in preset duration, base station equipment 200 can notify each in time
Target BS is released to the resource in the communication of each Target cell of terminal distribution, discharges the resource of each Target cell in time,
Effectively avoid the wasting of resources of each Target cell.
In another embodiment, the transceiver 220 is also used to the target BS transmission timing information；The timing
Information indicates that the target BS waits the second preset duration for being released to the resource of the terminal distribution.In this method, pass through
Timing information is sent to target BS, so that target BS voluntarily timing and can discharge resource, it is another again not need source base station
Row notifies it to discharge resource.
From above-described embodiment as can be seen that when base station equipment shown in Fig. 7 200 is used as above-mentioned source base station：Execute be on
State step S102, S103, S104, S108, S109, S113, S115, S116 and S117 in embodiment of the method.Specifically, processing
Device 210 executes the step S103 and S115 in above method embodiment.Transceiver 220 executes the step in above method embodiment
S102, S104, S108, S109, S113, S116 and S117.It is more when processor 210 and the execution above-mentioned steps of transceiver 220
Associated description of the details during reference can be made to the above method embodiment, details are not described herein again.
The other function of the processor 210, transceiver 220 is referred to accordingly implement in above-mentioned cell switching method
The description of example, details are not described herein.
When base station equipment 200 is used as above-mentioned target BS：
The instruction that transceiver 220 is used to receive source base station transmission is released to the information of the resource of the terminal distribution；
Processor 210 is used to be released to the resource of the terminal distribution.
In another embodiment, processor 210 is also used to as terminal distribution resource；Processor 210 is also used to start timing；
When timing duration reaches the second preset duration, if the transceiver 220 does not receive what the terminal was sent in the timing stage
Access request, then the processor 210 is released to the resource of the terminal distribution.
From above-described embodiment as can be seen that when base station equipment shown in Fig. 7 200 is used as above-mentioned target BS：Execute be
Step S105, S106, S107, S114 and S118 in above method embodiment.Specifically, processor 210 executes the above method
End is released to the step of determining whether terminal switching, in step S106, S114 in step S105 in embodiment
Timed process in the step of holding the resource of distribution, S118.Transceiver 220 executes in the step S105 in above method embodiment
Reception handover preparation request the step of, reception instruction in step S107, S114 be released to the resource of the terminal distribution
The step of release resource in the step of information, S118.It is more thin when processor 210 and the execution above-mentioned steps of transceiver 220
The associated description during reference can be made to the above method embodiment is saved, details are not described herein again.
The other function of the processor 210, transceiver 220 is referred to accordingly implement in above-mentioned cell switching method
The description of example, details are not described herein.
The present invention also provides a kind of communication system, which includes terminal 100 and the base station of above-described embodiment description
Equipment 200.It specifically is referred to above-described embodiment, details are not described herein.
In the above-described embodiments, can come wholly or partly by software, hardware, firmware or any combination thereof real
It is existing.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program
Product includes one or more computer instructions.When loading on computers and executing the computer program instructions, all or
It partly generates according to process or function described in the embodiment of the present invention.The computer can be general purpose computer, dedicated meter
Calculation machine, computer network or other programmable devices.The computer instruction can store in computer readable storage medium
In, or from a computer readable storage medium to the transmission of another computer readable storage medium, for example, the computer
Instruction can pass through wired (such as coaxial cable, optical fiber, number from a web-site, computer, server or data center
User's line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or
Data center is transmitted.The computer readable storage medium can be any usable medium that computer can access or
It is comprising data storage devices such as one or more usable mediums integrated server, data centers.The usable medium can be with
It is magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk
Solid State Disk (SSD)) etc..
In conclusion being not intended to limit the scope of the present invention the above is only the embodiment of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in protection of the invention
Within the scope of.
Claims (17)
1. a kind of cell switching method, which is characterized in that the method includes：
Terminal judges whether to meet the switching condition switched from being currently located cell to Target cell, wherein the switching condition
Fail including Radio Link Failure, terminal to the continuous preset times transmission upstream data in the base station for being currently located cell,
Terminal is higher than preset threshold, described to the failure rate that the base station for being currently located cell sends upstream data in preset duration
The signal strength of Target cell is higher than the terminal and is currently located at least one of signal strength of cell；
When meeting the switching condition, the terminal sends access request to target BS, and the target BS is the mesh
Mark the base station of cell.
2. the method as described in claim 1, which is characterized in that the method also includes：The terminal receives the current institute
In the base station of cell, the terminal that is used to trigger of transmission starts to judge whether to meet the information of the switching condition.
3. method according to claim 1 or 2, which is characterized in that the method also includes：The terminal receives described current
The instruction information that the base station of place cell is sent, the instruction information indicate that the target BS is being used for for the terminal distribution
Access the resource of the Target cell；
The terminal sends access request to target BS：The resource that the terminal is distributed according to the target BS
Access request is sent to the target BS.
4. a kind of cell switching method, which is characterized in that the method includes：
Source base station sends switching to the base station of each alternative cell and prepares to ask after the cell measurement information for receiving terminal transmission
It asks；
The switching that source base station receives target BS feedback prepares confirmation message, and the target BS is the base station of Target cell, institute
Stating Target cell is the alternative cell for allowing terminal to switch in each alternative cell；
The source base station sends to the terminal and opens for triggering the terminal after receiving the switching and preparing confirmation message
Beginning judges whether to meet the information from being currently located the switching condition that cell switches to the Target cell；
The switching condition includes that Radio Link Failure, terminal send upstream data to the continuous preset times of the source base station and lose
It loses, terminal sends the failure rate of upstream data to the source base station higher than preset threshold, the Target cell in preset duration
Signal strength be higher than the terminal be currently located at least one of signal strength of cell.
5. the cell switching method as described in power 4, which is characterized in that described to start to judge whether to meet for triggering the terminal
Information from being currently located the switching condition that cell switches to the Target cell includes：Indicate that the target BS is the end
The instruction information of the resource for accessing the Target cell of end distribution.
6. method as described in claim 4 or 5, which is characterized in that the method also includes：
The source base station is after the terminal is successfully accessed or switches, to where the cell that the terminal is successfully accessed or is switched
Other each target BS other than base station send the information for being used to indicate the resource for being released to the terminal distribution.
7. such as the described in any item methods of claim 4 to 6, which is characterized in that the method also includes：
The source base station has been sent after the cell measurement information for receiving terminal transmission or to the target BS
Start timing after the handover preparation request；
When timing reaches the first preset duration, if the source base station does not receive any instruction terminal also and is successfully accessed or cuts
The message of the Target cell is changed to, then the source base station is used to indicate to all target BS transmissions and is released to the end
Hold the information of the resource of distribution.
8. such as the described in any item methods of claim 4 to 6, which is characterized in that the method includes：
The source base station is to the target BS transmission timing information；The timing information indicates that described target BS etc. is to be released
For the second preset duration of the resource of the terminal distribution.
9. a kind of terminal, which is characterized in that the terminal includes processor and transceiver；
The processor is for judging whether to meet the switching condition switched from being currently located cell to Target cell, wherein institute
Stating switching condition includes that the continuous preset times in the base station that is currently located cell to send upstream data equal for Radio Link Failure, terminal
Failure, terminal are higher than preset threshold, institute to the failure rate that the base station for being currently located cell sends upstream data in preset duration
The signal strength for stating Target cell is higher than the terminal and is currently located at least one of signal strength of cell；
The transceiver is used for when meeting the switching condition, sends access request to target BS, the target BS is
The base station of the Target cell.
10. terminal as claimed in claim 9, which is characterized in that the transceiver, which is also used to receive, described is currently located cell
Base station send start to judge whether to meet the information of the switching condition for triggering the terminal.
11. the terminal as described in claim 9 or 10, which is characterized in that the transceiver is also used to receive described be currently located
The instruction information that the base station of cell is sent, the instruction information indicate that the target BS is the terminal distribution for accessing
The resource of the Target cell；
The transceiver sends to the target BS also particularly useful for the resource distributed according to the target BS and accesses
Request.
12. a kind of base station equipment, which is characterized in that the base station equipment includes processor and transceiver；
The transceiver is used to receive the cell measurement information of terminal transmission；
The processor is used for after the transceiver receives the cell measurement information, controls the transceiver to each standby
The base station of cell is selected to send handover preparation request；
The switching that the transceiver is also used to receive target BS feedback prepares confirmation message, and the target BS is Target cell
Base station, the Target cell be each alternative cell in allow terminal switch alternative cell；
The processor is also used to receive after the switching prepares confirmation message in the transceiver, control the transceiver to
The terminal is sent to be started to judge whether to meet from being currently located cell to switch to the Target cell for triggering the terminal
Switching condition information；
The switching condition includes that Radio Link Failure, terminal send upstream data to the continuous preset times of the base station equipment and lose
It loses, terminal sends the failure rate of upstream data in preset duration to the base station equipment to be higher than preset threshold, the target small
The signal strength in area is higher than the terminal and is currently located at least one of signal strength of cell.
13. base station equipment as claimed in claim 12, which is characterized in that described to start to judge whether for triggering the terminal
Meet from the information for being currently located the switching condition that cell switches to the Target cell and includes：Indicate the target BS for institute
State the instruction information of the resource for accessing the Target cell of terminal distribution.
14. base station equipment as described in claim 12 or 13, which is characterized in that the processor is also used to：In the terminal
After being successfully accessed or switching, control other than the base station where the transceiver to the cell that the terminal is successfully accessed or is switched
Other each target BS send the information for being used to indicate the resource for being released to the terminal distribution.
15. such as the described in any item base station equipments of claim 12 to 14, which is characterized in that the processor is also used to：Institute
Transceiver is stated to receive after the cell measurement information of terminal transmission or in the transceiver sent institute to the target BS
After stating handover preparation request, starting timer starts timing；
When timing reaches the first preset duration, if the transceiver does not receive any instruction terminal also and is successfully accessed or cuts
The message of the Target cell is changed to, then the processor is also used to control the transceiver and sends to all target BS
It is used to indicate the information for being released to the resource of the terminal distribution.
16. such as the described in any item base station equipments of claim 12 to 14, which is characterized in that the transceiver is also used to described
Target BS transmission timing information；The timing information indicates that the target BS waits the resource for being released to the terminal distribution
The second preset duration.
17. a kind of communication system, which is characterized in that the communication system includes such as claim 9 to 11 described in any item ends
End and such as described in any item base station equipments of claim 12 to 16.
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| CN202111356410.6A CN114222332A (en) | 2017-05-10 | 2017-05-10 | Cell switching method, terminal, base station equipment and communication system |
| CN201710326023.5A CN108882316B (en) | 2017-05-10 | 2017-05-10 | Cell switching method, terminal, base station equipment and communication system |
| PCT/CN2018/086268 WO2018205965A1 (en) | 2017-05-10 | 2018-05-10 | Cell switching method, terminal, base station device and communication system |
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| CN202111356410.6A Division CN114222332A (en) | 2017-05-10 | 2017-05-10 | Cell switching method, terminal, base station equipment and communication system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108882316B (en) | 2021-11-19 |
| WO2018205965A1 (en) | 2018-11-15 |
| CN114222332A (en) | 2022-03-22 |
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