CN107040957B - A kind of switching method centered on user terminal - Google Patents
A kind of switching method centered on user terminal Download PDFInfo
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- CN107040957B CN107040957B CN201610078372.5A CN201610078372A CN107040957B CN 107040957 B CN107040957 B CN 107040957B CN 201610078372 A CN201610078372 A CN 201610078372A CN 107040957 B CN107040957 B CN 107040957B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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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
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- 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
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/36—Reselection control by user or terminal equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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Abstract
The switching method that this application provides a kind of centered on user terminal.This method comprises: when user terminal determination needs to switch immediately, and target CCU is not then to send tunnel switching request to service VCU when itself establishing VCU, by service VCU come the handoff procedure of managing user terminal to target BS after tunnel foundation；When establishing tunnel, target CCU establishes the VCU of the user, and when establishing completion and user has completed tunnel switching, then the VCU that target CCU is established can be consigned to for the management control to user by servicing VCU.It can be realized the seamless switching of customer-centric with this solution.
Description
Technical field
The present invention relates to field of communication technology, in particular to a kind of switching method centered on user terminal.
Background technique
The signal transmission of mobile communication is divided into control plane and data surface, and control plane is used for the access control of user, cell
Between switching, bearer connection management, wireless resource management etc., data surface is used for the transmission of user's efficient communication data.Current control
Face is intended to centralized management, data surface is intended to Distributed Multi cooperation transmission.Control plane is intended to the original of centralized management
Because being that the expense of control signaling can be reduced, reducing user's handover between cells, unified management radio resource with preferably on-demand
There is provided channel resource for user, and preferably carry out interference control etc..Data surface be intended to Distributed Multi transmission be then can
To efficiently use the diversity and spatial multiplexing gain of multi-chain circuit transmission, improve data transfer rate and guarantee communication quality.Thus one
The Radio Access Network framework of a centralization control becomes a development trend of mobile communication naturally.
The Radio Access Network framework of so-called centralization control, i.e., multiple base stations are connected to a centralized control unit
(Central Control Unit, CCU) carries out unified resource management to connection base station by the unit, covers model to base station
It encloses user and access control, base station to data distribution between core net etc. is provided.
Network function virtualization (NFV) technology is the development trend of mobile communication network device.The following centralized control unit
It will be made of the general hardware platform based on NFV technology with virtualization control software.General hardware platform is mainly responsible in realization
Physical connection between heart control unit and other equipment, the function that virtualization control software is mainly responsible for general hardware platform are real
It is existing, and specific data and signaling are transmitted between triggering centralized control unit other equipment connected to it.
The equipment of one centralized control unit connection mainly includes access net side base station, other centralized control units, core
Net side data gateway.The coverage area of centralized control unit control is no longer simple directly with physical connection as a result,
The sum of the coverage area of base station, but the control software of the virtualization by being carried on general hardware platform determines that software is one
It can be controlled by the base station that local centralized control unit is connect with other centralized control units under fixed condition, therefore, one
The coverage area of a centralized control unit control is the virtual subdistrict determined by virtualization control actually.
In traditional access planar network architecture, covered when user terminal is moved to another base station from a base station range
When range, need to occur the switching of minizone.And this handover mechanism is no longer desirable for based on the novel of virtual platform control
Access planar network architecture.Novel connecting enters the user terminal switching problem of planar network architecture, the not instead of switching in the meaning of conventional cell, according to
Specific virtualization control function design, between data and signaling centralized control unit, between centralized control unit and base station, center
The variation of specific transmission path between control unit and core network data gateway, and how to change depending on centralized control unit
The specific works mechanism of the virtualization control platform of carrying.
Summary of the invention
In view of this, the application provides a kind of switching method centered on user terminal, it can be realized with user and be
The seamless switching of the heart.
In order to solve the above technical problems, the technical solution of the application is achieved in that
A kind of switching method centered on user terminal, this method comprises:
When user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than first threshold according to measurement result,
If it is determined that target CCU is not that this user terminal establishes destination virtual control unit (Virtual Control Unit, VCU), then
Measurement result and tunnel switching request are transmitted to the service VCU of this user terminal by serving BS by the user terminal；
When service VCU receives the measurement result and tunnel switching request, by measurement result and tunnel switching request
It is recorded in the status information of the user terminal；And institute is sent to target CCU by the interface channel of service CCU and target CCU
Measurement result, tunnel switching request are stated, and information needed for establishing VCU for the user terminal；
Target CCU be information needed for the user terminal establishes VCU is that the user terminal establishes target according to receiving
VCU, and will establish service VCU to tunnel between target BS needed for information by service CCU be sent to service VCU；
Service VCU services VCU according to the foundation received and establishes tunnel to information needed for tunnel between target BS, and will
The data information and signalling of the user terminal switch to target BS by serving BS；If it is determined that being switched to target VCU pipe
The user terminal is managed, then the transfer management of user is switched into target VCU by servicing VCU, on service VCU not by user terminal
The data being transmitted are sent to target VCU, and target VCU is made to manage the user terminal；To core network data gateway transmitting path
Switching notice, make the gateway will transmission path relevant to the user terminal by service VCU switch to target VCU, and and mesh
Mark VCU establishes data and signaling paths.
As can be seen from the above technical solution, in the application in the wireless access network based on virtual platform, net is efficiently utilized
Calculating, storage and the transfer resource of network establish dynamic user's connection management mechanism according to the mobility of user, thus realize with
Seamless switching centered on user terminal.
Detailed description of the invention
Fig. 1 is a kind of switching flow schematic diagram centered on user terminal of the embodiment of the present application；
Fig. 2 is the switching flow schematic diagram in the embodiment of the present application two centered on user terminal；
Fig. 3 is the switching flow schematic diagram in the embodiment of the present application three centered on user terminal；
Fig. 4 is the processing flow schematic diagram in the embodiment of the present application four centered on user terminal；
Fig. 5 is the processing flow schematic diagram in the embodiment of the present application five centered on user terminal.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples,
Technical solution of the present invention is described in detail.
The application provides a kind of switching method centered on user terminal, in the wireless access network based on virtual platform
In, calculating, storage and the transfer resource of network are efficiently utilized, dynamic user's connection management machine is established according to the mobility of user
System, to realize the seamless switching centered on user terminal.
In embodiment provided by the present application, when accessing user terminal to network, corresponding CCU can establish for the user terminal
One dedicated VCU for user terminal connection control management, and records the related status information and data of user terminal.
Base station, CCU and VCU in the embodiment of the present application can be deployed as same equipment, can also be deployed in difference respectively
In equipment, it can be combined with two and be deployed in an equipment, in specific deployment way the embodiment of the present application with no restrictions.
VCU can be used as the exclusive storage and control function of a user terminal, and function can be controlled soft based on the virtualization of CCU
Part is realized.
For the store function of VCU, then for recording the status information and data of user terminal, wherein status information packet
Include user terminal basic configuration information, metrical information, connection and transmission state information etc., such as user terminal ID, user terminal
Channel between the resource allocation status of connection status, user terminal association base station between base station, user terminal and base station is surveyed
Measure result, user terminal transmission mode, user terminal switching request and response etc..
For the control function of VCU, then on the one hand according to user terminal state information, management is coordinated and user terminal phase
The processes such as the transfer resource distribution of pass, serving BS and transmission mode selection, and correlated results is recorded in the shape of user terminal
In state information；On the other hand the interaction of relevant to user terminal data and signaling in associated transport channel is then managed and controlled.
Specifically can include: VCU reads the data relevant to user terminal and signaling for reaching CCU, and user's end is recorded
It holds in related status information；VCU triggers related channel program according to the transmission demand, status information and related signaling of user terminal
It is upper to transmit data relevant to user terminal and signaling.
Various channel transfer resources can be carried out virtualization control, the instruction execution that each channel is specifically exported according to VCU by VCU
The transmission of related data and signaling.Related channel program may include logical between channel, CCU and other CCU between CCU and data gateway
It eats dishes without rice or wine between channel, base station between road, CCU and user terminal association base station and user terminal.
Direct transmission channel of each channel for VCU not instead of in traditional sense between two equipment, with user
The relevant transmission path of terminal may relate to logical between the connection between multiple equipment, such as CCU and user terminal association base station
Road, one is the channel between CCU and its base station with direct physical connection, another kind can be CCU and pass through with other CCU's
Interface channel is connected to the associated base station other CCU in a manner of tunnel.
User terminal sends signal to peripheral base station and makees measurement of correlation, to be judged according to measurement result in moving process
Itself whether need to switch over operation.
Metrical information may include that channel information, the user terminal between user terminal and peripheral base station move out base station covering model
The remaining time etc. enclosed.
With reference to the accompanying drawing, the handoff procedure realized centered on user terminal in the embodiment of the present application is described in detail.
Embodiment one
The embodiment is to need to switch immediately in user terminal determination, and target CCU is not that the user terminal establishes target
In the case where VCU, the handoff procedure centered on user terminal is realized.
Referring to Fig. 1, Fig. 1 is a kind of switching flow schematic diagram centered on user terminal of the embodiment of the present application.Specific step
Suddenly are as follows:
When user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than first threshold according to measurement result,
It determines that the user terminal needs to switch immediately, that is, switches more urgent.
First threshold is configured according to practical application.
It is which user terminal establishes VCU which CCU can be stored on base station, and therefore, user terminal passes through current clothes
Business base station determines whether target CCU is that this user terminal establishes VCU.
The tunnel switching request that user terminal is sent, for requesting service VCU to set up by target CCU and target BS
Between communication tunnel, service VCU can from target CCU obtain complete tunnel switching needed for information.
When specific implementation, measurement result and tunnel switching request are first sent to serving BS by user terminal, service base
It stands and measurement result and tunnel switching request is sent to service CCU, service CCU again asks measurement result and tunnel switching
It asks and is transmitted to service VCU.
Target CCU establishes target VCU, and information needed for establishing service VCU to tunnel between target BS passes through clothes
Business CCU be sent to service VCU operation in no particular order sequence, can carry out simultaneously.
In step 103, after target CCU establishes completion target VCU, target CCU can be sent to service VCU and establishes completion target
The confirmation message of VCU.
After executing step 104, service VCU is held when receiving target CCU and establishing the confirmation message for completing target VCU
Row step 105.
Service VCU manages the user terminal if it is determined that not switching to target VCU, then is connected to mesh using the tunnel of foundation
The transmission marking base station and implementing to user terminal is managed.
Embodiment two
The embodiment is to need to switch immediately in user terminal determination, and target CCU is that the user terminal establishes target VCU
In the case where, realize the handoff procedure centered on user terminal.
Referring to fig. 2, Fig. 2 is the switching flow schematic diagram in the embodiment of the present application two centered on user terminal.Specific step
Suddenly are as follows:
When user terminal and target BS establish interface channel, user terminal initiates the connection establishment process to target BS,
Interface channel is established with target BS.It is true to send connection foundation to target VCU after the completion of interface channel is established for target BS
Recognize message.
Embodiment three
The embodiment is to need to switch immediately in user terminal determination, and target CCU is that the user terminal establishes target VCU
In the case where, realize the handoff procedure centered on user terminal.
It is the switching flow schematic diagram in the embodiment of the present application three centered on user terminal referring to Fig. 3, Fig. 3.Specific step
Suddenly are as follows:
Step 301, when user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than the according to measurement result
When one threshold value, however, it is determined that target CCU is that this terminal establishes target VCU, then is cut measurement result and tunnel by serving BS
Change the service VCU that request is transmitted to this user terminal.
Service VCU manages the user terminal if it is determined that not switching to target VCU, then is connected to mesh using the tunnel of foundation
The transmission marking base station and implementing to user terminal is managed.
Example IV
The embodiment is may to switch in user terminal determination, and target CCU is not that the user terminal establishes target
In the case where VCU, the treatment process centered on user terminal is realized；When determination may switch, and target CCU has been this
It is without any processing when user terminal establishes target VCU.
Referring to fig. 4, Fig. 4 is the processing flow schematic diagram in the embodiment of the present application four centered on user terminal.Specific step
Suddenly are as follows:
Step 401, when user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than the according to measurement result
Two threshold values and be not less than first threshold when, however, it is determined that target CCU is not that this terminal establishes target VCU, then the user terminal passes through
Serving BS is transmitted to the corresponding service VCU of service CCU by measurement result, and in the request that target CCU establishes target VCU.
When user terminal according to measurement result determine by service CCU be switched to target CCU probability be greater than second threshold and
When not less than first threshold, user terminal determines that itself may switch, and needing target CCU is that user terminal establishes target
VCU。
Second threshold is configured according to practical application, and second threshold is less than first threshold.
Step 402, service VCU receives the measurement result, and when target CCU establishes the request of target VCU, will
Measurement result and request are recorded in the status information of user；And by the interface channel of service CCU and target CCU to target
CCU sends the measurement result, establishes the request of target VCU in target CCU, and establishes needed for VCU for the user terminal
Information.
Step 403, if target CCU is determined as user end according to the measurement result and own resource state that receive
Target VCU is established at end, then establishes target VCU for the user terminal, is established target VCU to service VCU transmission by target CCU and is rung
Selection accesses the user terminal when answering, and connection of the target BS between user terminal initiation target BS being notified to establish.
If target CCU is determined according to the measurement result and own resource state received and is not established for the user terminal
Target VCU then directly sends the response for not establishing target VCU to service VCU, and notifies to use by serving BS by service VCU
Family terminal.
Step 404, target VCU is established response and is sent to user terminal by serving BS by service VCU.
Embodiment five
The embodiment is to determine temporarily not needing to switch in user terminal, and target CCU is that the user terminal establishes target
In the case where VCU, the treatment process centered on user terminal is realized.
It is the processing flow schematic diagram in the embodiment of the present application five centered on user terminal referring to Fig. 5, Fig. 5.Specific step
Suddenly are as follows:
Step 501, when user terminal determines that the probability for being switched to target CCU by servicing CCU is not more than according to measurement result
When second threshold, however, it is determined that target CCU is that this terminal establishes target VCU, then the user terminal passes through serving BS to service CCU
Corresponding service VCU sends the request that delete target VCU is established.
The probability of target CCU is switched to no more than second threshold by servicing CCU when user terminal is determined according to measurement result
When, that is, determine that user terminal does not need temporarily to switch over, if target CCU has been that the user terminal establishes target VCU, sends
Removal request establishes the occupied resource of VCU to be released to the user terminal.
When determining resource shared by release target VCU, when deleting the target VCU, and sending response to service VCU, take
Delete target VCU is identified band；When determine do not discharge resource shared by target VCU when, to service VCU send response when, carry not
Delete target VCU mark.
Serving BS and target BS in the embodiment of the present application are not limited to single base station.It is unlimited to service CCU and target CCU
In single CCU.
In above-mentioned treatment process, in fact it could happen that user terminal is all established at service CCU and target CCU has oneself exclusive
VCU situation needs to keep the user terminal relevant information between service VCU and target VCU synchronous at this time.Work as user terminal simultaneously
It completes to be switched from current service VCU to target VCU, when there is no discharging current service VCU, original service VCU becomes new target
VCU, former target VCU become new service VCU, and user can use step 501 and initiate to step 504 to release target at this time
The implementation process of VCU can also discharge former service VCU automatically after the completion of VCU switches and occupy resource.I.e. when user terminal is by taking
When business VCU is switched to target VCU, established service VCU is deleted.
In conclusion the application is by efficiently using the calculating of network, depositing in the wireless access network based on virtual platform
Storage and transfer resource, establish dynamic user's connection management mechanism according to the mobility of user, so that realization is with user terminal
The seamless switching at center.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (8)
1. a kind of switching method centered on user terminal, which is characterized in that this method comprises:
When user terminal determines that the probability for being switched to target CCU by service center controls unit CCU is greater than the according to measurement result
When one threshold value, however, it is determined that target CCU is not that this user terminal establishes destination virtual nonshared control unit VCU, then the user terminal
Measurement result and tunnel switching request are transmitted to the service VCU of this user terminal by serving BS；
When service VCU receives the measurement result and tunnel switching request, measurement result and tunnel switching request are recorded
Into the status information of the user terminal；And the survey is sent to target CCU by the interface channel of service CCU and target CCU
Result, tunnel switching request are measured, and information needed for establishing target VCU for the user terminal；
Target CCU be information needed for the user terminal establishes target VCU is that the user terminal establishes target according to receiving
VCU, and will establish service VCU to tunnel between target BS needed for information by service CCU be sent to service VCU；
Service VCU establishes tunnel to information needed for tunnel between target BS according to the foundation service VCU received, and by the use
The data information and signalling of family terminal switch to target BS by serving BS；It should if it is determined that being switched to target VCU management
The transfer management of user is then switched to target VCU by servicing VCU by user terminal, and user terminal is not transmitted on service VCU
The data of completion are sent to target VCU, and target VCU is made to manage the user terminal；Switch to core network data gateway transmitting path
Notice makes the gateway that transmission path relevant to the user terminal by servicing VCU is switched to target VCU, and with target VCU
Establish data and signaling paths.
2. the method according to claim 1, wherein the method further includes:
When user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than first threshold according to measurement result, if really
The CCU that sets the goal is that this terminal establishes target VCU, then the user terminal and target BS establish interface channel；
When the interface channel that target VCU receives target BS transmission establishes completion confirmation message, by user terminal and target base
The connection status stood is recorded in the status information of the user；By the data information of the user terminal and signalling by service base
Station switches to target BS；The data that user terminal is not transmitted on service VCU are sent to target VCU, make target VCU
Manage the user terminal；And to core network data gateway transmitting path switching notice, make the gateway will be with the user terminal phase
The transmission path of pass switches to target VCU by servicing VCU, and establishes data and signaling paths with target VCU.
3. the method according to claim 1, wherein the method further includes:
When user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than first threshold according to measurement result, if really
The CCU that sets the goal is that this terminal establishes target VCU, then is transmitted to measurement result and tunnel switching request by serving BS
The service VCU of this user terminal；
When service VCU receives the measurement result and tunnel switching request, measurement result and tunnel switching request are recorded
Into the status information of the user terminal；And the survey is sent to target CCU by the interface channel of service CCU and target CCU
Amount is as a result, and tunnel switching request；
Target CCU will establish service VCU between target BS when receiving the measurement result and tunnel switching request
Information needed for tunnel is sent to service VCU by servicing CCU；
Service VCU establishes tunnel to information needed for tunnel between target BS according to the foundation service VCU received, and by the use
The data information and signalling of family terminal switch to target BS by serving BS；It should if it is determined that being switched to target VCU management
The transfer management of user is then switched to target VCU by servicing VCU by user terminal, and user terminal is not transmitted on service VCU
The data of completion are sent to target VCU, and target VCU is made to manage the user terminal；Switch to core network data gateway transmitting path
Notice makes the gateway that transmission path relevant to the user terminal by servicing VCU is switched to target VCU, and with target VCU
Establish data and signaling paths.
4. the method according to claim 1, wherein the method further includes:
When user terminal determines that the probability for being switched to target CCU by servicing CCU is greater than second threshold and not small according to measurement result
When first threshold, however, it is determined that target CCU is not that this terminal establishes target VCU, then the user terminal will be surveyed by serving BS
Amount is as a result, and be transmitted to the corresponding service VCU of service CCU in the request that target CCU establishes target VCU；
Service VCU receives the measurement result, and when target CCU establishes the request of target VCU, by measurement result and asks
It asks and is recorded in the status information of user；And the survey is sent to target CCU by the interface channel of service CCU and target CCU
Amount result establishes in target CCU the request of target VCU, and information needed for establishing target VCU for the user terminal；
If target CCU, which is determined as the user terminal according to the measurement result and own resource state that receive, establishes target
VCU then establishes target VCU for the user terminal, establishes target VCU response to service VCU transmission by target CCU, and notify
Target BS initiates selection when the connection between target BS is established in the user terminal and accesses the user terminal；
Target VCU is established response and is sent to user terminal by serving BS by service VCU.
5. the method according to claim 1, wherein the method further includes:
When user terminal is determined according to measurement result is switched to the probability of target CCU no more than second threshold by servicing CCU, if
Determine that target CCU is that this terminal establishes target VCU, then the user terminal passes through serving BS to the corresponding service VCU of service CCU
Send the request that delete target VCU is established；
The request that service VCU establishes delete target VCU records in the status information of the user terminal, and sends to target CCU
The request that delete target VCU is established；
When target VCU receives the request that the delete target VCU is established, according to determining whether to discharge resource shared by target VCU
Respective handling is carried out, and sends the response for carrying processing result to service VCU；
Service VCU is sent to the user terminal by serving BS when receiving the response for carrying processing result, keeps user whole
End knows whether to have deleted the foundation of the target VCU according to the processing result；
When user's discovery temporarily does not need to switch, and at user's discovery target CCU it has been when oneself establishing target VCU,
VCU can be sent to service VCU and establishes cancellation request, and it has been that the VCU that user establishes occupies resource that release, which may be selected, in target CCU.
6. the method according to claim 1, wherein the method further includes:
When user terminal is completed from the switching of service VCU to target VCU, established service VCU is deleted.
7. method described in -6 any one according to claim 1, which is characterized in that
The target CCU is for establishing and delete target VCU；
The service VCU is for establishing and deleting service VCU.
8. method described in -6 any one according to claim 1, which is characterized in that
The VCU is used to be corresponding user terminal storage state information and data；According to user state information, management is coordinated
Transfer resource distribution relevant to user terminal, serving BS and transmission mode selection；And manage and control associated transport channel
In data and signaling related to user interaction.
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| CN104363622A (en) * | 2014-11-14 | 2015-02-18 | 宇龙计算机通信科技(深圳)有限公司 | Cell switching method and device |
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