CN105517067B - Switching method and system based on carrier wave polymerization - Google Patents
Switching method and system based on carrier wave polymerization Download PDFInfo
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- CN105517067B CN105517067B CN201510846999.6A CN201510846999A CN105517067B CN 105517067 B CN105517067 B CN 105517067B CN 201510846999 A CN201510846999 A CN 201510846999A CN 105517067 B CN105517067 B CN 105517067B
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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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Abstract
The present invention relates to the switching method being polymerize based on carrier wave and systems.The described method includes: be respectively set first base station and the second base station a main plot and several secondary cells；Main plot is used for transmitting scheduling information, and secondary cell is used for the data information transfer of user equipment under this base station main plot；Detect that user equipment switches from first base station to the second base station, candidate secondary cell is selected from the second base station secondary cell as Target cell, and according to the covering measurement report of user equipment in the main plot for obtaining the second base station；Switching request message is sent to Target cell, includes candidate secondary cell information in the switching request message；Target cell selects target secondary cell according to the reserved resource information of the second base station secondary cell of preservation from candidate secondary cell；It include the incision request confirmation message of target secondary cell information to user equipment forwarding.The present invention reduces handover delays, reduce intercarrier signal interference.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to the switching method and system being polymerize based on carrier wave.
Background technique
With the development of mobile communication long term evolution (Long Term Evolution, hereinafter referred to as LTE) technology, LTE is used
Family portfolio and data throughout are continuously increased, and traditional LTE is no longer satisfied user demand, and then evolution goes out LTE-
Advanced technology, which introduce a significant technologies: carrier aggregation technology.Carrier aggregation technology can gather multiple carrier waves
A broader frequency spectrum is synthesized, while some discontinuous frequency spectrum fragments can also be aggregated to together, formation one is broader
Frequency spectrum, it is therefore an objective to provide higher rate for user.With the continuous propulsion of development and the race of 4G business, operator pair
The demand of frequency spectrum resource is growing day by day.Since total frequency spectrum resource is limited, following movement to it is wide in the market, operator
It can focus on the research to the utilization rate of frequency spectrum resource, more to solve the bottleneck that user rate is limited on limited spectrum resources.
Carrier aggregation technology is exactly to solve the problems, such as one of the important means of this.
User equipment in connected state is in moving process, or because of the network coverage, or because of reasons such as network loads, causes
It changes in the cell lower channel quality of connection, influences service rate, in order to guarantee that the quality of customer service, system can be
The user equipment selects the better cell of another communication quality, needs to execute handover operation at this time.However in carrier aggregation scene
Under, due to the operation that selects and activates of multicarrier, wireless resource management between multicarrier increases the handover operation time；Specifically such as:
Due to the delay problem to be come of carrier wave polymerization process flow in handoff procedure, or determine the process of target BS cell list
Time-consuming high problem.The problem of affecting handover success rate there is also the signal interference etc. between multicarrier, specifically such as: between multicarrier
The reasonability problem for the cell list that signal interference problem or target BS are determined caused by transmission data mutually causes
The problem of handover failure.
As it can be seen that traditional switching method handover delay based on carrier wave polymerization is long, and there are intercarrier signal interferences, it is difficult to
Ensure user equipment business service quality in moving process.
Summary of the invention
Based on this, the switching method and system provided by the invention based on carrier wave polymerization can reduce handover delay, reduce
Intercarrier signal interference ensures business service quality of the user equipment in moving process.
The invention adopts the following technical scheme:
One aspect of the present invention provides the switching method polymerizeing based on carrier wave, comprising:
Be respectively set first base station and the second base station a main plot and several secondary cells；Main plot is used for scheduling information
Transmission, secondary cell are used for the data information transfer of user equipment under this base station main plot, and secondary cell is distributed in advance for user equipment
After staying resource, reserved resource information is sent to this base station main plot and is saved；
Detect that user equipment switches from first base station to the second base station, the main plot for obtaining the second base station is small as target
Area, and candidate secondary cell is selected from the second base station secondary cell according to the covering measurement report of user equipment；
Switching request message is sent to the Target cell, includes candidate secondary cell information in the switching request message；
Target cell receives the switching request message, according to the reserved resource information of the second base station secondary cell of preservation,
The cell for being assigned reserved resource in candidate secondary cell for user equipment is elected to be target secondary cell；
It is forwarded by first base station to the user equipment and cuts request confirmation message, in the incision request confirmation message
Comprising target secondary cell information, the user equipment carries out base station switching according to incision request confirmation message.
Another aspect of the present invention provides the switching system polymerizeing based on carrier wave, comprising:
Setup module, for be respectively set first base station and the second base station a main plot and several secondary cells；Master is small
Area be used for transmitting scheduling information, secondary cell be used for this base station main plot under user equipment data information transfer, secondary cell for
After user equipment distributes reserved resource, reserved resource information is sent to this base station main plot and is saved；
Judging module obtains the master of the second base station for detecting that user equipment switches from first base station to the second base station
Cell is selected from the second base station secondary cell according to the covering measurement report of user equipment candidate auxiliary small as Target cell
Area；
Request module includes time in the switching request message for sending switching request message to the Target cell
Select secondary cell information；
Preparation module receives the switching request message for Target cell, according to the second base station secondary cell of preservation
The cell for being assigned reserved resource in candidate secondary cell for user equipment is elected to be target secondary cell by reserved resource information；
Confirm execution module, it is described for forwarding incision request confirmation message to the user equipment by first base station
Cutting includes target secondary cell information in request confirmation message, and the user equipment carries out base station according to incision request confirmation message
Switching.
The beneficial effect for implementing above-mentioned technical proposal of the invention includes: to administer one small in cell by setting base station
The main plot that area cuts/cuts out for user equipment as this base station, secondary cell of other cells as this base station, main plot is used for
Transmitting scheduling information, secondary cell are used for the data information transfer of user equipment under this base station main plot, and secondary cell is set for user
After back-up matches reserved resource, reserved resource information is sent to this base station main plot and is saved；If it is detected that user equipment from
First base station switches to the second base station, then according to the covering measurement report of user equipment from the base station of the first base station pre-established
The main plot of the second base station is obtained in neighboring cell list as Target cell, and auxiliary from the second base station according to the covering measurement report
Candidate secondary cell is selected in cell；The master of adjacent base station and each adjacent base station in the base station neighboring cell list comprising first base station
Cell and secondary cell；Switching request message is sent to the Target cell, includes candidate secondary cell in the switching request message
Information；Target cell receives the switching request message, according to the reserved resource information for the secondary cell that Target cell locally saves,
The cell for being assigned reserved resource in candidate secondary cell for user equipment is elected to be target secondary cell；Finally by first base station to
Request confirmation message is cut in the user equipment forwarding, includes target secondary cell information, institute in the incision request confirmation message
It states user equipment and base station switching is carried out according to incision request confirmation message.The present invention program is compared with prior art, the present invention tool
It has the advantages that:
(1) by setting main plot and secondary cell, the selection of permission user equipment or gravity treatment main plot avoid main plot
Frequent replacement operation, improve system performance；
(2) main plot is specified to be used for transmitting scheduling information, secondary cell is used for the data of user equipment under this base station main plot
Information transmission, i.e., specified main plot is scheduling carrier wave, and secondary cell is secondary carrier, reduces the selection operation of scheduling carrier wave, is reduced
The time delay of switching, and reduce the signal interference of major-minor intercarrier, carrier signal is interfered between decreasing base station, has ensured tune
Spend the reliability transmission of information；
(3) defined main plot and corresponding can be obtained under adjacent base station by X2 link between base station or S1 link
Secondary cell provides range of choice for source base station selection target secondary cell, reduces the selection time of target secondary cell；
(4) it by retaining the resource allocation information of source base station secondary cell in the main plot of source base station, is no longer needed to when cutting out
The resource information for inquiring each secondary cell respectively, reduces and cuts out the time；
(5) by the reserved resource information of the main plot reserved target base station secondary cell in target BS, when incision, is not necessarily to
The return information that each secondary cell of target BS is waited by information exchange, reduces cut-in timing；
(6) candidate cell information that target BS is provided by source base station can quickly select the target under target BS
Secondary cell reduces the cut-in timing of carrier wave polymerization.
Detailed description of the invention
Fig. 1 is the hardware environment schematic diagram for implementing the switching method polymerizeing the present invention is based on carrier wave；
Fig. 2 is the schematic flow chart of the switching method based on carrier wave polymerization of one embodiment of the invention；
Fig. 3 is the schematic diagram of the switching system based on carrier wave polymerization of one embodiment of the invention；
Fig. 4 is the schematic diagram of the judging module in the embodiment of the present invention.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment provided by the invention includes the switching method embodiment based on carrier wave polymerization, further includes corresponding based on load
The switching system embodiment of wave polymerization.It is described in detail separately below.
Fig. 1 is the hardware environment schematic diagram for implementing the switching method polymerizeing the present invention is based on carrier wave.As shown in Figure 1, implementing
The hardware environment of switching method the present invention is based on carrier wave polymerization includes:
SeNB (evolved NodeB, evolution NodeB): it is responsible for signal processing and the resource management of source base station rank；
TeNB (evolved NodeB, evolution NodeB): it is responsible for signal processing and the resource management of target BS rank；
UE (User Equipment, user equipment): wireless signal is measured and is forwarded；As shown in Figure 1, including
UE1 and UE2；
MME (Mobility Management Entity, mobility management entity): believe between processing UE and core network
The interaction of order；
Cell (cell): the signal processing for the cell being responsible under base station and resource management, a base station can have multiple small
Area, a sector can also have multiple cells；As shown in Figure 1, SeNB administration cell includes Cell1-1, Cell1-2 and Cell1-
3, TeNB administration cells include Cell2-1, Cell2-2 and Cell2-3；
GW (Gate way, gateway node): it is responsible for the forwarding of signaling and data.
Wherein, by X2 link connection between SeNB and TeNB, pass through S1 link connection between SeNB, TeNB and GW.
Fig. 2 is the schematic flow chart of the switching method based on carrier wave polymerization of one embodiment of the invention.Such as institute in Fig. 2
Show, the switching method based on carrier wave polymerization of the present embodiment includes the following steps S101 to step S105, and detailed description are as follows:
S101, be respectively set first base station and the second base station a main plot and several secondary cells；Main plot is for adjusting
Information transmission is spent, secondary cell is used for the data information transfer of user equipment under this base station main plot, and secondary cell is for user equipment
After distributing reserved resource, reserved resource information is sent to this base station main plot and is saved.
In the present embodiment, setting first base station administer cell in a cell as this base station for user equipment incision/
The main plot cut out, secondary cell of other cells as this base station, main plot are used for transmitting scheduling information, and secondary cell is used for this base
The data information transfer of user equipment under station owner's cell, secondary cell is after distributing reserved resource for user equipment, by reserved resource
Information is sent to this base station main plot and is saved；
Similarly, what the cell that the second base station of setting is administered in cell was cut/is cut out for user equipment as this base station
Main plot, secondary cell of other cells as this base station, main plot are used for transmitting scheduling information, and secondary cell is small for this base station master
The data information transfer of user equipment under area, secondary cell send out reserved resource information after distributing reserved resource for user equipment
It send to this base station main plot and is saved；
Specifically, basic parameter can be broadcasted by the way that LTE system is arranged, Cell1-1, which is used as, in setting SeNB administration cell is somebody's turn to do
The main plot (back abbreviation main plot is PCell) of all UE under base station, is responsible for the cell selection and reselection operation of control UE,
And specified PCell is scheduling carrier wave, is used for transmitting scheduling information；Cell1-2 is the secondary cell (letter below that Cell1-3 is SeNB
Secondary cell is referred to as SCell), the data information transfer for user equipment (UE1) under Cell1-1.Similarly, by the way that LTE system is arranged
System broadcast basic parameter, setting TeNB administer main plot of the Cell2-1 as all UE under the base station in cell, are responsible for control
UE is in the cell selection of this base station and reselection operation, and specified PCell is scheduling carrier wave, and Cell2-2 and Cell2-3 are under TeNB
Secondary cell, the data information transfer for user equipment (UE2) under Cell2-1.
The purpose that major-minor cell is arranged is: not allowing UE to carry out selection or gravity treatment SCell cell, guarantees the cell of UE incision
It is fixed PCell cell, avoids the frequent replacement operation of PCell, when reduces the caused switching of scheduling carrier wave selection
Prolong, while decreasing the interference of major-minor intercarrier, can also accordingly reduce the interference of intercarrier between base station, it is whole to improve system
Body performance.
After each cell activates successfully, each SCell calculates separately the reserved resource of the UE rank of its distribution, and notifies this base station
PCell saved, it is therefore an objective to may directly learn that the reserved resource information of whole SCell under this base station on PCell, no
It waits each SCell to return to the information of reserved resource in handoff procedure, reduces carrier wave and polymerize lower handover delay.
S102 detects that user equipment switches from first base station to the second base station, obtains the main plot conduct of the second base station
Target cell, and candidate secondary cell is selected from the second base station secondary cell according to the covering measurement report of user equipment.
In the present embodiment, detect that user equipment switches from first base station to the second base station, according to the covering of user equipment
Measurement report obtains the main plot of the second base station as Target cell from the base station neighboring cell list of the first base station pre-established,
And candidate secondary cell is selected from the second base station secondary cell according to the covering measurement report；Include in the base station neighboring cell list
The main plot and secondary cell of the adjacent base station of first base station and each adjacent base station；
Therefore, the base station neighboring cell list for establishing first base station, the base station adjacent area column are further comprised the steps of: before this step
Main plot and the secondary cell of adjacent base station and each adjacent base station in table comprising first base station.
In the present embodiment, by obtaining the covering sent in the user equipment moving process in first base station to first base station
Measurement report, and according to the corresponding covering measured value size of cell each in the covering measurement report, find out covering measured value most
Big cell；If it is detected that the cell is not belonging to first base station, the base station neighboring cell list for searching the first base station pre-established is obtained
The cell own base station determines that user equipment switches from first base station to the second base station as the second base station out, and obtains second
The main plot of base station is as Target cell.
Further, candidate secondary cell concrete mode is selected from the second base station secondary cell according to the covering measurement report
Can include: whole secondary cells of the second base station are obtained according to the base station neighboring cell list of first base station, detect the covering measurement report
It is recorded in announcement with the presence or absence of the measurement of the corresponding secondary cell in the second base station, and if it exists, by the corresponding secondary cell selected as candidates in the second base station
Secondary cell.
In the present embodiment, candidate secondary cell i.e. may be as the cell of UE SCell under the second base station.
S103, Xiang Suoshu Target cell send switching request message, include candidate secondary cell in the switching request message
Information；
In the present embodiment, the covering measurement report that first base station is sent according to user equipment is selected from the second base station secondary cell
Out the reasonability of SCell selection after switching may be enhanced as the candidate secondary cell of UE SCell under the second base station；And
Candidate secondary cell is supplied to the second base station by first base station, so that can to quickly select the target under our station auxiliary small for the second base station
Area reduces the cut-in timing of carrier wave polymerization.
S104, Target cell receives the switching request message, according to the reserved resource of the second base station secondary cell of preservation
The cell for being assigned reserved resource in candidate secondary cell for user equipment is elected to be target secondary cell by information；
Preferably, the cell for being assigned reserved resource in candidate secondary cell for user equipment is being elected to be target secondary cell,
It later further include that the secondary cell as target secondary cell is requested to redistribute reserved resource, Target cell record is redistributed
Resource information switches for next UE and uses；
And for Target Station switching if it fails, being only more than specified thresholds without each recycling SCell resource,
It goes to recycle again, reduces system operation procedures.I.e. after secondary cell redistributes reserved resource, detection Target cell saves each
Whether the record of secondary cell reaches setting quantity, if reaching, when this handover failure, corresponding secondary cell is requested to be provided
Source recycling.
S105 forwards incision request confirmation message, the incision request confirmation to the user equipment by first base station
It include target secondary cell information in message, the user equipment carries out base station switching according to incision request confirmation message.
In the present embodiment, Target cell carries out the configuration of radio resource to the target secondary cell selected, and will match confidence
Breath is sent to first base station by switching request acknowledgement message together, and it is true that first base station receives the incision request that Target cell is sent
Recognize after message, obtains the currently used first base station secondary cell of user equipment as cell to be deleted.
Further, first base station sends incision request confirmation message, the incision request confirmation to the user equipment
It also include cell information to be deleted in message；Therefore, user equipment described in the present embodiment according to incision request confirmation message into
It further include the step for deleting carrier configuration information relevant to cell to be deleted in user equipment in the execution step of row base station switching
Suddenly, to improve the utilization rate of user device system resource.
It should be noted that first base station is source base station in the present embodiment, the second base station is target BS.
Based on the realization step of the above-mentioned switching method based on carrier wave polymerization, in conjunction with Fig. 1, Fig. 2, below with specific example pair
Switching method based on carrier wave polymerization of the invention is illustrated, the specific implementation process is as follows:
(1) LTE system is set and broadcasts basic parameter, guarantees that the cell of base station SeNB selection Cell1-1 control UE selects, again
Choosing and incision operation, cell selection, gravity treatment and the incision operation of base station TeNB selection Cell2-1 control UE, i.e. Cell1-1,
Main plot PCell of the Cell2-1 as all UE under corresponding base station；
(2) setting LTE system broadcasts basic parameter, guarantees that other Cell of base station administration are served only for as secondary cell
SCell, is responsible for the data dispatch of UE under corresponding PCell, and UE is not allowed to carry out selection or gravity treatment or be cut into SCell cell.
(3) specifying the PCell under each base station is scheduling carrier wave.
(4) after each cell foundation activates successfully, the reserved resource of UE rank is respectively calculated on SCell respectively, and be sent to
This base station PCell is saved.
(5) base station SeNB and TeNB obtains the neighboring BS relationship and adjacent area parameter between base station, and according to adjacent area by X2 link
Relationship establishes base station neighboring cell list, while which cell that can also mark in the neighboring cell list of base station is defined PCell cell, which
A little cells are SCell cell.
(6) PCell under base station SeNB and TeNB records the broadcast public information of its lower SCell respectively, is mainly used for matching
Set the SCell information of the corresponding selection of UE.
(7) UE1 selects Cell1-1 cell to carry out resident and establish bearer service under the base station SeNB, and Cell1-1 is made
Transmitting scheduling information is served only for as the scheduling carrier wave of all carrier waves for its PCell；Simultaneous selection Cell1-2 and Cell1-3
As its SCell, it is served only for transmitting data information.
(8) UE1 starts mobile to base station TeNB coverage area.
(9) it will receive the covering measurement report of UE1 as the SeNB of source base station, process initially enters carrier wave polymerization switching pipe
Unit is managed, specifically, into measurement module unit, after carrying out the sequence of base station neighboring cell list, into next step.
It should be noted that the carrier wave cohesively managed unit of base station side can be divided into 4 units: PCell administrative unit,
SCell administrative unit, carrier wave scheduling unit, carrier resource administrative unit.
(10) source base station SeNB is according to carrier wave polymerizable functional, and incoming carrier cohesively managed unit, selection is with carrier wave polymerization
Target cell, into PCell administrative unit, and inquire carrier wave aggregate resource administrative unit, determine Target cell.
If when the selection target cell of source station, if the covering maximum cell of measured value selected is small for the SCell of target BS
Area then changes Target cell according to base station neighboring cell list, finds the main plot of target BS as real Target cell.
(11) the PCell administrative unit under source base station SeNB obtains the corresponding whole SCell cell of Target cell, passes through
SCell administrative unit inquires carrier wave aggregate resource administrative unit.
(12) the PCell administrative unit under source base station SeNB is according to whole SCell cells under the Target cell inquired,
The measurement report that whether there is corresponding SCell is inquired in measurement report, and if it exists, is then recorded, simultaneously as candidate secondary cell
Charge to candidate SCell list；
(13) the PCell administrative unit under source base station SeNB obtains the SCell list information currently in use of UE1, passes through
SCell administrative unit is called, SCell administrative unit is inquired carrier wave aggregate resource administrative unit again and be can be obtained, as to be deleted
Cell is simultaneously charged to and has used SCell list；
(14) source base station SeNB is finally by source base station information, including candidate SCell list and has used SCell list, and one
Play the Target cell PCell cell that target BS TeNB is sent to by S1 or X2 link；
(15) after the PCell under Target Station TeNB receives switching request message, it is judged as carrier wave polymerization incision, then notifies
Carrier wave cohesively managed unit informs that SCell administrative unit provides the cell in candidate's SCell list, selection signal according to source station
High-quality SCell information, and notify PCell administrative unit, directly take out reserved resource SCell it is auxiliary small as target
Area, and charge to SCell and increase list.The new reserved resource of each SCell distribution selected simultaneously by information exchange request, and lead to
Know that corresponding PCell retains newly assigned reserved resource, for subsequent UE use.
(16) Target Station TeNB provides scheduling carrier wave, i.e. Target Station TeNB selects Cell2-1 as scheduling carrier wave.
(17) Target Station TeNB provides corresponding SCell increase list and SCell delete list (is arranged using SCell
Table)；
(18) Target Station TeNB increases the SCell cell progress radio-resource-configuration in list to SCell, and will match confidence
Breath, SCell increase list and SCell delete list passes through switching request acknowledgement message together and is sent to source base station SeNB；
(19) corresponding configuration information is transmitted to UE1 by source base station SeNB；
(20) UE1 enables new configuration after receiving message immediately, comprising: is first deleted according to SCell delete list and source base
The relevant SCell configuration information of the SeNB that stands, the new SCell cell for increasing list configuration target BS further according to SCell are related
SCell configuration information, and send handoff completion message to the PCell (i.e. Target cell) under target BS TeNB.
(21) after the PCell under target BS TeNB receives the handoff completion message of UE1, notice MME is switched successfully, MME
It notifies source base station SeNB release UE1 in all resources of base station side, is provided including the UE1 PCell used at SeNB and SCell
Source.
(22) if the PCell under this handover failure, such as target BS TeNB does not receive UE1's within the set time
Handoff completion message, or the switch failure information of rear UE1 is received, it is the reserved money of UE distribution without each recycling SCell
Source, reserved resource can switch for next UE to be used；Only when certain SCell, which reserves resource, is more than setting thresholding, then provided
Source recycling, thus reduces system operation procedures, improves system performance.
By examples detailed above as it can be seen that the present invention is based on the switching methods of carrier wave polymerization to be divided into two big implementation phases: switching prepares
Stage and handover execution stage.It summarizes explanation to two implementation phases below:
Handoff preparation phase, content are mainly as follows:
LTE system is set and broadcasts basic parameter, ensures that SeNB selects Cell1- in Cell1-1, Cell1-2, Cell1-3
1 PCell as all UE under the base station, and specified PCell is scheduling carrier wave；LTE system is set and broadcasts basic parameter, is protected
Barrier TeNB selects Cell2-1 as the PCell of all UE under the base station in Cell2-1, Cell2-2, Cell2-3), and refer to
Determining PCell is scheduling carrier wave；LTE system is set and broadcasts basic parameter, other Cell are then served only for be responsible for phase as SCell
The data dispatch of UE under PCell is answered, UE is not allowed to carry out selection or gravity treatment this cell；After each cell foundation activates successfully, respectively
The reserved resource of the UE rank of distribution is calculated by SCell, and PCell is notified to be saved, it is therefore an objective to can be direct on PCell
Learn the SCell resource under this base station；
Also, base station SeNB and TeNB can obtain neighboring BS relationship and adjacent area parameter by X2 link, and establish base station with this
Neighboring cell list also indicates which cell is defined PCell cell under adjacent base station in the neighboring cell list of base station, which is small for SCell
Area.
PCell under base station SeNB and TeNB records the broadcast message of respectively its lower SCell respectively, is mainly used for configuring UE
SCell resource information.Purpose is to may directly learn that the resource of SCell on PCell, is returned the result without waiting for SCell.
UE can only select Cell1-1 cell to be accessed under the base station SeNB, and using Cell1-1 as its PCell, be served only for scheduling and carry
The resource of wave, occupancy is seldom, can increase throughput of system；Simultaneous selection Cell1-2 and Cell1-3 is carried out as its SCell
Data transmission, can increase the data throughout of UE, improve UE peak rate.
Handover execution stage, content are mainly as follows:
As UE is mobile to TeNB coverage area, source base station SeNB will receive the covering measurement report of UE, and determination needs to carry out
When base station switches, triggering UE is switched over.
When source base station SeNB selection target cell, if the Target cell of initial option is the SCell of TeNB, according to neighboring station
Information changes Target cell, only selects the PCell under TeNB as Target cell；SCell of the source base station SeNB also according to TeNB
List selects the cell existed only in the covering measurement report that UE is reported as candidate SCell, and by measurement result and candidate
SCell sends jointly to target BS TeNB；SCell information under the present SeNB of UE can be also sent to target by source base station SeNB
Base station TeNB.Specifically, UE SCell configuration information currently in use can be obtained directly in the PCell of SeNB；
The candidate SCell that the PCell of Target Station TeNB is provided according to source station, select reserved resource as target
SCell, and directly take out from the PCell of TeNB the reserved resource of stored target SCell.It simultaneously can also request target
The new reserved resource of SCell distribution is supplied to other UE and uses；
UE carries out carrier wave polymerization switching according to the target SCell selected and SCell to be deleted.UE can only be selected at TeNB
Cell2-1 access, and using Cell2-2 and Cell2-3 as SCell, it is served only for transmitting data information.If switching achievement, TeNB
PCell receive the handover success message of UE transmission after, notice MME is switched successfully, and MME reinforms source base station SeNB and discharge the UE
In all resources of SeNB base station side, PCell the and SCell resource used under the base station SeNB including the UE.If this switches
After failure, without the reserved resource of recycling SCell, which can directly keep for other switching user equipmenies to use, directly
Reserved number of resources to SCell is more than that setting quantity is recycled again, it is therefore an objective to reduce the operation of system, lifting system
Energy.
According to the abovementioned embodiments of the present invention, reduce the handover delay under carrier aggregation scene, reduce major-minor intercarrier
Signal interference, improve system performance.
It should be noted that for the aforementioned method embodiment, describing for simplicity, it is all expressed as a series of dynamic
It combines, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described, because of foundation
The present invention, certain steps can use other sequences or carry out simultaneously.Secondly, those skilled in the art should also know that, it says
Embodiment described in bright book belongs to preferred embodiment, and related actions and modules might not all be that the present invention must
Must.
Below to the poly- based on carrier wave of the embodiment of the present invention that can be used for executing the above-mentioned switching method based on carrier wave polymerization
The switching system of conjunction is illustrated.Fig. 3 is the schematic diagram of the switching system based on carrier wave polymerization of the embodiment of the present invention,
For ease of description, it illustrate only part related to the embodiment of the present invention in figure, it will be understood by those skilled in the art that figure
Shown in system structure not structure paired systems restriction, may include than illustrating more or fewer components, or combination
Certain components or different component layouts.
Fig. 3 is the schematic diagram of the switching system based on carrier wave polymerization of one embodiment of the invention, as shown in figure 3,
The switching system based on carrier wave polymerization of the present embodiment includes: setup module 310, judging module 320, request module 330, prepares
Module 340 and confirmation execution module 350, in which:
Setup module 310, for be respectively set first base station and the second base station a main plot and several secondary cells；It is main
Cell is used for transmitting scheduling information, and secondary cell is used for the data information transfer of user equipment under this base station main plot, and secondary cell exists
After distributing reserved resource for user equipment, reserved resource information is sent to this base station main plot and is saved；
Judging module 320 obtains the second base station for detecting that user equipment switches from first base station to the second base station
It is selected from the second base station secondary cell according to the covering measurement report of user equipment candidate auxiliary small as Target cell main plot
Area；
Request module 330 is used to send switching request message to the Target cell, includes in the switching request message
Candidate secondary cell information；
Preparation module 340 receives the switching request message for Target cell, according to the second base station secondary cell of preservation
Reserved resource information, will be that user equipment is assigned the cell of reserved resource and is elected to be target secondary cell in candidate secondary cell；
Execution module 350 is confirmed, for forwarding incision request confirmation message, institute to the user equipment by first base station
It states comprising target secondary cell information in incision request confirmation message, the user equipment carries out base according to incision request confirmation message
It stands switching.
As a preferred embodiment, the switching system based on carrier wave polymerization of the present embodiment may also include, consular district list
Module is established, includes the adjacent base of first base station for establishing the base station neighboring cell list of first base station, in the base station neighboring cell list
It stands and the main plot of each adjacent base station and secondary cell.
Preferably, as shown in figure 4, the exemplary judging module 320 of Fig. 3 may include measuring unit 321, decision unit 322
With selecting unit 323, wherein
Measuring unit 321 is covered for obtaining in the user equipment moving process in first base station to what first base station was sent
Lid measurement report；
Decision unit 322, for finding out according to the corresponding covering measured value size of cell each in the covering measurement report
Cover the maximum cell of measured value；If it is detected that the cell is not belonging to first base station, the base of the first base station pre-established is searched
Neighboring cell list of standing show that the cell own base station as the second base station, determines that user equipment is cut from first base station to the second base station
It changes, and obtains the main plot of the second base station as Target cell；
Selecting unit 323, for obtaining whole secondary cells of the second base station according to the base station neighboring cell list, described in detection
It covers in measurement report and is recorded with the presence or absence of the measurement of the corresponding secondary cell in the second base station, and if it exists, the second base station respective secondary is small
Area's selected as candidates secondary cell.
Preferably, the user equipment carries out base station switching according to incision request confirmation message, comprising:
The user equipment receives incision request confirmation message, switches to the Target cell from first base station main plot,
And according to target secondary cell information update carrier configuration information；Handoff completion message, the target are sent to the Target cell
Cell, which receives the handoff completion message and returns to first base station, switches successfully message, to discharge user described in first base station side
The relevant resource of equipment.
It is preferably, described that incision request confirmation message is forwarded to the user equipment by first base station, comprising:
First base station receive Target cell send incision request confirmation message, obtain user equipment it is currently used first
Base station secondary cell is as cell to be deleted；First base station sends incision request confirmation message, the incision to the user equipment
It also include cell information to be deleted in request confirmation message；
Corresponding, the user equipment carries out base station switching according to incision request confirmation message, further includes: deletes user and sets
Carrier configuration information relevant to cell to be deleted in standby.
As a preferred embodiment, the preparation module 340 is also used to request the secondary cell weight as target secondary cell
New to distribute reserved resource, Target cell records deallocated resources information；And each secondary cell that detection Target cell saves
Record whether reach setting quantity, if reaching, when this handover failure, request corresponding secondary cell to carry out resource and return
It receives.
It should be noted that the contents such as information exchange, implementation procedure in above-described embodiment between each module/unit, by
In with preceding method embodiment of the present invention be based on same design, bring technical effect and preceding method embodiment phase of the present invention
Together, for details, please refer to the description in the embodiment of the method for the present invention, and details are not described herein again.
In addition, the logic of each functional module is drawn in the embodiment of the switching system based on carrier wave polymerization of above-mentioned example
Divide and be merely illustrative of, can according to need in practical application, such as the configuration requirement of corresponding hardware or the reality of software
Existing convenient consideration, above-mentioned function distribution is completed by different functional modules, i.e., by the switching system based on carrier wave polymerization
The internal structure of system is divided into different functional modules, to complete all or part of the functions described above.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments.
In addition, each functional module stated in each embodiment before this invention can integrate in a processing module,
It can be modules to physically exist alone, can also be integrated in two or more modules in a module.It is above-mentioned integrated
Module both can take the form of hardware realization, can also be realized in the form of software function module.
If the integrated module is realized in the form of software function module and sells or use as independent product
When, it can store in a computer readable storage medium.Those of ordinary skill in the art will appreciate that of the invention appoints
The all or part of the steps of the specified method of meaning embodiment be can be instructed by program relevant hardware (personal computer,
Server or the network equipment etc.) it completes.The program can be stored in a computer readable storage medium.The program exists
When execution, all or part of the steps of the specified method of above-mentioned any embodiment can be performed.Aforementioned storage medium may include appointing
What can store the medium of program code, such as read-only memory (Read-Only Memory, ROM), random access device
(Random Access Memory, RAM), disk or CD etc..
The above are the descriptions to the switching method provided by the present invention based on carrier wave polymerization and system, for this field
Those skilled in the art, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range,
To sum up, the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. the switching method based on carrier wave polymerization characterized by comprising
Be respectively set first base station and the second base station a main plot and several secondary cells；Main plot is passed for scheduling information
Defeated, secondary cell is used for the data information transfer of user equipment under this base station main plot, and secondary cell is reserved for user equipment distribution
After resource, reserved resource information is sent to this base station main plot and is saved；
It detects that user equipment switches from first base station to the second base station, obtains the main plot of the second base station as Target cell,
And candidate secondary cell is selected from the second base station secondary cell according to the covering measurement report of user equipment；
Switching request message is sent to the Target cell, includes candidate secondary cell information in the switching request message；
Target cell receives the switching request message and will be waited according to the reserved resource information of the second base station secondary cell of preservation
The cell for being assigned reserved resource in secondary cell for user equipment is selected to be elected to be target secondary cell；
Incision request confirmation message is forwarded to the user equipment by first base station, includes in the incision request confirmation message
Target secondary cell information, the user equipment carry out base station switching according to incision request confirmation message；
Wherein, described to detect that user equipment switches from first base station to the second base station, obtain the main plot conduct of the second base station
Target cell, before further include: establish the base station neighboring cell list of first base station, include first base station in the base station neighboring cell list
Adjacent base station and each adjacent base station main plot and secondary cell；
The covering measurement report according to user equipment selects candidate secondary cell from the second base station secondary cell, comprising: according to
The base station neighboring cell list obtains whole secondary cells of the second base station, detects and whether there is the second base in the covering measurement report
The measurement for corresponding secondary cell of standing records, and if it exists, by the corresponding secondary cell selected as candidates secondary cell in the second base station.
2. according to claim 1 based on carrier wave polymerization switching method, which is characterized in that it is described detect user equipment from
First base station switches to the second base station, obtains the main plot of the second base station as Target cell, including,
Obtain the covering measurement report sent in the user equipment moving process in first base station to first base station；
According to the corresponding covering measured value size of cell each in the covering measurement report, it is maximum small to find out covering measured value
Area；If it is detected that the cell is not belonging to first base station, searches base station neighboring cell list and obtain the cell own base station as the second base
It stands, determines that user equipment switches from first base station to the second base station, and obtain the main plot of the second base station as Target cell.
3. the switching method according to claim 1 based on carrier wave polymerization, which is characterized in that the user equipment is according to incision
Request confirmation message carries out base station switching, comprising:
The user equipment receives incision request confirmation message, switches to the Target cell, and root from first base station main plot
According to target secondary cell information update carrier configuration information；
Handoff completion message is sent to the Target cell, and the Target cell receives the handoff completion message and to the first base
Return of standing switches successfully message, to discharge the relevant resource of user equipment described in first base station side.
4. the switching method according to claim 3 based on carrier wave polymerization, which is characterized in that it is described by first base station to institute
State user equipment forwarding incision request confirmation message, comprising:
First base station receives the incision request confirmation message that Target cell is sent, and obtains the currently used first base station of user equipment
Secondary cell is as cell to be deleted；
First base station sends incision request confirmation message to the user equipment, also include in the incision request confirmation message to
Delete cell information；
The user equipment carries out base station switching according to incision request confirmation message, further includes:
Delete carrier configuration information relevant to cell to be deleted in user equipment.
5. the switching method according to claim 3 based on carrier wave polymerization, which is characterized in that described in the Target cell receives
Switching request message will be user equipment in candidate secondary cell according to the reserved resource information of the second base station secondary cell of preservation
The cell for being assigned reserved resource is elected to be target secondary cell, further includes later,
The secondary cell as target secondary cell is requested to redistribute reserved resource, Target cell records deallocated resources letter
Breath；
Whether the record for each secondary cell that detection Target cell saves reaches setting quantity, if reaching, when this handover failure
When, request corresponding secondary cell to carry out resource reclaim.
6. the switching system based on carrier wave polymerization characterized by comprising
Setup module, for be respectively set first base station and the second base station a main plot and several secondary cells；It uses main plot
In transmitting scheduling information, secondary cell is used for the data information transfer of user equipment under this base station main plot, and secondary cell is for user
After equipment distributes reserved resource, reserved resource information is sent to this base station main plot and is saved；
Judging module obtains the main plot of the second base station for detecting that user equipment switches from first base station to the second base station
Candidate secondary cell is selected from the second base station secondary cell as Target cell, and according to the covering measurement report of user equipment；
Request module includes candidate auxiliary in the switching request message for sending switching request message to the Target cell
Cell information；
Preparation module receives the switching request message for Target cell, according to the reserved of the second base station secondary cell of preservation
The cell for being assigned reserved resource in candidate secondary cell for user equipment is elected to be target secondary cell by resource information；
Execution module is confirmed, for forwarding incision request confirmation message, the incision to the user equipment by first base station
It include target secondary cell information in request confirmation message, the user equipment carries out base station according to incision request confirmation message and cuts
It changes；
Module is established in consular district list, for establishing the base station neighboring cell list of first base station, comprising the in the base station neighboring cell list
The main plot and secondary cell of the adjacent base station of one base station and each adjacent base station；
The judging module, comprising:
Selecting unit detects the covering and surveys for obtaining whole secondary cells of the second base station according to the base station neighboring cell list
Measurement in amount report with the presence or absence of the corresponding secondary cell in the second base station records, and if it exists, is elected to be the corresponding secondary cell in the second base station
Candidate secondary cell.
7. the switching system according to claim 6 based on carrier wave polymerization, which is characterized in that the judging module further includes,
Measuring unit, for obtaining the covering measurement report sent in the user equipment moving process in first base station to first base station
It accuses；
Decision unit, for finding out covering and surveying according to the corresponding covering measured value size of cell each in the covering measurement report
The maximum cell of magnitude；If it is detected that the cell is not belonging to first base station, searches the base station neighboring cell list and obtain the cell institute
Belong to base station as the second base station, determine that user equipment switches from first base station to the second base station, and the master for obtaining the second base station is small
Area is as Target cell.
8. the switching system according to claim 6 based on carrier wave polymerization, which is characterized in that the user equipment is according to incision
Request confirmation message carries out base station switching, comprising:
The user equipment receives incision request confirmation message, switches to the Target cell, and root from first base station main plot
According to target secondary cell information update carrier configuration information；
Handoff completion message is sent to the Target cell, and the Target cell receives the handoff completion message and to the first base
Return of standing switches successfully message, to discharge the relevant resource of user equipment described in first base station side.
9. the switching system according to claim 8 based on carrier wave polymerization, which is characterized in that it is described by first base station to institute
State user equipment forwarding incision request confirmation message, comprising:
First base station receives the incision request confirmation message that Target cell is sent, and obtains the currently used first base station of user equipment
Secondary cell is as cell to be deleted；
First base station sends incision request confirmation message to the user equipment, also include in the incision request confirmation message to
Delete cell information；
The user equipment carries out base station switching according to incision request confirmation message, further includes:
Delete carrier configuration information relevant to cell to be deleted in user equipment.
10. the switching system according to claim 8 based on carrier wave polymerization, which is characterized in that the preparation module is also used to
The secondary cell as target secondary cell is requested to redistribute reserved resource, Target cell records deallocated resources information；With
And whether the record of each secondary cell of detection Target cell preservation reaches setting quantity, and if reaching, when this handover failure,
Corresponding secondary cell is requested to carry out resource reclaim.
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| CN108282837B (en) * | 2017-01-06 | 2020-03-10 | 维沃移动通信有限公司 | Cell switching method, related equipment and system |
| EP3589020A4 (en) * | 2017-03-07 | 2020-01-08 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Resource processing method, network-side device, terminal, and system |
| WO2019215381A1 (en) * | 2018-05-10 | 2019-11-14 | Nokia Technologies Oy | Secondary cell beam recovery |
| CN110545560B (en) * | 2018-05-29 | 2020-11-17 | 维沃移动通信有限公司 | Switching method, device and storage medium |
| CN110419242B (en) * | 2019-06-14 | 2022-04-08 | 小米通讯技术有限公司 | Aggregation connection establishment method, device and storage medium |
| FI128786B (en) * | 2019-07-17 | 2020-12-15 | Nokia Solutions & Networks Oy | Enhanced blind configuration of a cell |
| CN112423329A (en) * | 2019-08-23 | 2021-02-26 | 上海诺基亚贝尔股份有限公司 | Method, device and system for determining PSCell by master node in dual-connection system |
| CN113115384B (en) * | 2021-03-22 | 2022-07-08 | 中国联合网络通信集团有限公司 | Communication method, device, equipment and storage medium |
| CN113965969A (en) * | 2021-11-17 | 2022-01-21 | 中国电信股份有限公司 | Cell switching method, device, base station and communication system |
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