CN103024890B - Method, evolved node B and terminal for uplink synchronization of secondary cell - Google Patents
Method, evolved node B and terminal for uplink synchronization of secondary cell Download PDFInfo
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- CN103024890B CN103024890B CN201110279985.2A CN201110279985A CN103024890B CN 103024890 B CN103024890 B CN 103024890B CN 201110279985 A CN201110279985 A CN 201110279985A CN 103024890 B CN103024890 B CN 103024890B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
Abstract
The invention provides a method, an evolved node B and a terminal for uplink synchronization of a secondary cell. The method comprises the following steps that: the evolved node B receives a random access preamble which is transmitted by the terminal on the secondary cell according to the uplink time sequence of a primary cell on a terminal side; the evolved node B compares the receiving time of the random access preamble with the downlink time sequence of the primary cell on the evolved node B side; and the evolved node B generates time sequence adjustment instruction information according to the comparison result and transmits the time sequence adjustment instruction information to the terminal, wherein the time sequence adjustment instruction information is used for instructing the terminal to adjust the uplink time sequence of the secondary cell on the terminal side to be synchronous with the uplink time sequence of the primary cell on the evolved node B side. By adopting the method, the evolved node B and the terminal, the technical problem that the uplink time sequences of the primary cell and the secondary cell cannot be synchronized in the prior art is solved, and normal communication between the evolved node B and the terminal is guaranteed.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of uplink synchronisation method of secondary cell, base station and terminal.
Background technology
Carrier aggregation is a Core Feature in the long evolving system strengthen version, by using some carrier waves parallel
Or cell, to greatly improve the up-downgoing speed of UE (User Equipment, user equipment).There is the UE of carrier aggregation function
The little of polymerization divides into a main plot (Primary Cell, referred to as Pcell) and several secondary cells (Secondary
Cell, referred to as Scell), wireless heterogeneous networks (Radio Resource Control, referred to as RRC) are responsible in main plot
Connection establishment, re-establish and switch, provide Non-Access Stratum for each Serving cell (i.e. Pcell or Scell)
(NonAccess Stratum, referred to as NAS) mobile message (for example tracking area instruction (Tracking Area Indicator,
Referred to as TAI)), and connection re-establishment on RRC for each Serving cell and switching, main plot provides safety to input, main
The descending carrier that cell uses referred to as descending principal component carrier wave (Downlink Primary Component Carrier, referred to as
For DL PCC), and up-link carrier referred to as up principal component carrier wave (Uplink Primary Component Carrier, referred to as
UL PCC), the descending carrier that secondary cell uses is referred to as descending auxiliary component carrier (Downlink Secondary Component
Carrier, referred to as DL SCC), up-link carrier is referred to as up auxiliary component carrier (Uplink Secondary Component
Carrier, referred to as UL SCC).
For each secondary cell, UE when using ascending resource and downlink resource, the descending auxiliary component carrier of configuration
Quantity is more than or equal to the quantity of up auxiliary component carrier, wherein it is impossible to the resource on Scell is all configured to ascending resource.
For the angle of UE, each ascending resource only belongs to a Serving cell (i.e. Pcell or Scell), and UE joins
The quantity of the Serving cell put can change according to the carrier capability of UE, such as increase and or delete Serving cell, and here with
The safer key of time-varying and RACH (Random Access Channel, RACH) process.
Pcell is only capable of realizing by way of switching with the change of terminal or the configuration relation of base station, and PCell is used for passing
Defeated Physical Uplink Control Channel (Physical Uplingk Control Channel, referred to as PUCCH), and be forever in
Activated state.
As Pcell experience Radio Link Failure (Radio Link Failure, referred to as RLF), UE will be Pcell weight
Set up wireless link, during Scell experience RLF, UE then will not re-establish wireless link for Scell, and NAS information source is in Pcell.
Reconfiguring, increase and removing of Scell is all completed by RRC, switching in LTE (Long Term Evolution, Long Term Evolution)
In, RRC can increase, delete and reconfigure Scell so as to be applied to target PCell, when adding a new Scell, make
Send all necessary system information of Scell with dedicated RRC signaling.
In order to save power supply, Scell can be activated and deexcitation.The Scell being in deactivated state is without reception physics
Down control channel (Physical Downlink Control Channel, referred to as PDCCH) or physical down share letter
Road (Physical Downlink Sharing Channel, referred to as PDSCH) is it is impossible to carry out uplink it is not necessary to execute letter
Road quality instruction (Channel Quality Indicator, referred to as CQI) measurement.The activation of Scell and deexcitation are by MAC
(Media Access Control, medium education) control unit and packet data inactivity timer control.When UE receives MAC control
When unit controls, if corresponding bit is 1, then the Scell that MAC Control Element controls will be activated, and otherwise will be deactivated,
When packet data inactivity timer expires, this Scell will be deactivated.
Scell from deactivation status to state of activation will carry out the synchronization of up-link, for identical band (frequency band)
For interior Serving cell, the up-link of Scell and the up-link of Pcell are synchronous, and in different band
For Serving cell, the up-link of Scell cannot be synchronized with the up-link of Pcell, as shown in figure 1, eNB (E-
UTRAN NodeB, evolved base station) under two Serving cells of deployment be respectively cell 1 (cell 1) and cell 2 (cell 2),
Cell 1 is deployed in frequency F1, and cell2 is deployed in frequency F2, and RRH/repeater (transponder) will form an increasing simultaneously
The cell 2portion 2 (region 2, be equivalent to Scell) of strong signal, if UE1 is in this portion 2, the up letter of UE1
Number will be with the up letter of the UE2 being in cell 2portion 1 (being equivalent to Pcell) after the forwarding of RRH/repeater
Number sequential difference.However, according to the regulation of existing protocol it is impossible to up timing synchronization is carried out to Pcell and Scell, thus leading
The communication between UE and base station is caused to occur abnormal.
Content of the invention
The invention provides a kind of uplink synchronisation method of secondary cell, base station and terminal, at least to solve in prior art
Main plot and secondary cell cannot be carried out with the technical problem of up timing synchronization.
According to an aspect of the invention, it is provided a kind of uplink synchronisation method of secondary cell, it includes：Base station receives eventually
The end random access guiding that the up sequential in end side sends according to main plot in secondary cell；Base station is to random access guiding
The reception time be compared in the descending sequential of base station side with main plot；Base station generates sequential adjustment instruction according to comparative result
Information, and sequential adjustment configured information is sent to terminal, wherein, sequential adjustment configured information is used for instruction terminal by secondary cell
Up sequential in end side is adjusted to the up timing synchronization with main plot in base station side.
Preferably, base station was compared in the descending sequential of base station side with main plot to the reception time of random access guiding
Step include：Calculate the reception time and main plot difference between the present sub-frame time started of the descending sequential of base station side
Value；Base station includes according to the step that comparative result generates sequential adjustment configured information：If the time of reception is equal to main plot in base station
The present sub-frame time started of the descending sequential of side, then generate the first sequential adjustment configured information, do not execute for instruction terminal
The operation of the adjustment up sequential in end side for the secondary cell or secondary cell described in the described terminal of instruction are upper in described end side
Row sequential and described main plot are in the up timing synchronization of described base station side；If the time of reception is more than main plot under base station side
The present sub-frame time started of row sequential, then generate the second sequential adjustment configured information, for instruction terminal by secondary cell at end
The up sequential of side shifts to an earlier date；If the time of reception is less than the present sub-frame time started of the descending sequential in base station side for the main plot,
Then generate the 3rd sequential adjustment configured information, for instruction terminal, secondary cell is delayed in the up sequential of end side.
Preferably, comprise, in sequential adjustment configured information, the information that the up sequential belonging to secondary cell is organized in advance, wherein, on
Row sequential organize in advance for the up sequential in end side by secondary cell be adjusted to main plot base station side up sequential with
Step.
Preferably, after sequential adjustment configured information is sent to terminal, also include：Terminal receives sequential adjustment and refers to
Show information；Terminal adjusts configured information according to sequential and is adjusted to main plot in base station secondary cell in the up sequential of end side
The up timing synchronization of side.
Preferably, terminal according to sequential adjust configured information by secondary cell the up sequential in described end side be adjusted to
The step of the up timing synchronization in base station side for the main plot includes：Terminal is according to belonging to sequential adjusts the secondary cell in configured information
The information organized in advance of up sequential secondary cell be adjusted to belong to up sequential in advance in group.
Preferably, main plot and secondary cell are the cell after carrier aggregation.
According to a further aspect in the invention, there is provided a kind of base station, it includes：Receiving unit, for receiving terminal auxiliary
The random access guiding that in cell, the up sequential in end side sends according to main plot；Comparing unit, for Stochastic accessing
The leading reception time is compared in the descending sequential of base station side with main plot；Signal generating unit, for giving birth to according to comparative result
Become sequential adjustment configured information, wherein, sequential adjust configured information be used for instruction terminal by secondary cell end side up when
Sequence is adjusted to the up timing synchronization with main plot in base station side；Transmitting element, for being sent to sequential adjustment configured information
Terminal.
Preferably, signal generating unit includes：First generation module, if for receiving the time equal to the descending sequential of main plot
The present sub-frame time started, then generate the first sequential adjustment configured information, do not execute adjustment secondary cell at end for instruction terminal
The operation of the up sequential of side or the up sequential in described end side for the secondary cell and described master described in the described terminal of instruction
Cell is in the up timing synchronization of described base station side；Second generation module, if for receive the time be more than main plot descending when
The present sub-frame time started of sequence, then generate the second sequential adjustment configured information, for instruction terminal by secondary cell in end side
Up sequential shift to an earlier date；3rd generation module, if the present sub-frame being less than the descending sequential of main plot for the reception time starts
Time, then generate the 3rd sequential adjustment configured information, for instruction terminal, secondary cell is delayed in the up sequential of end side.
According to another aspect of the invention, there is provided a kind of terminal, it includes：Transmitting element, for auxiliary little in base station
In area, according to main plot, the up sequential in end side sends random access guiding；Receiving unit, for receiving base station transmission
Sequential adjusts configured information, and wherein, it is little with master according to the reception time of random access guiding by base station that sequential adjusts configured information
Comparative result between the descending sequential of base station side for the area generates and obtains, and sequential adjustment configured information will be auxiliary little for instruction terminal
The up sequential in end side for the area is adjusted to the up timing synchronization in base station side with main plot；Adjustment unit, for according to when
By secondary cell, the up sequential in end side is adjusted to the up timing synchronization with main plot in base station side to sequence adjustment configured information.
Preferably, the up sequential that adjustment unit is additionally operable to according to belonging to sequential adjusts the secondary cell in configured information shifts to an earlier date
Secondary cell is adjusted to and belongs to up sequential in advance in group by the information of group.
In the present invention, base station can be entered in the up sequential of end side to secondary cell by sequential adjustment configured information
Row adjustment, so that the up sequential in end side for the secondary cell after adjustment is same in the up sequential of base station side with main plot
Step, thus solve the technical problem that main plot and secondary cell cannot be carried out in prior art with up timing synchronization it is ensured that
Proper communication between base station and terminal.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the wireless communication system deployment according to correlation technique；
Fig. 2 is a kind of preferred structure figure of the uplink synchronous system of secondary cell according to embodiments of the present invention；
Fig. 3 is a kind of preferred structure block diagram of base station according to embodiments of the present invention；
Fig. 4 is a kind of preferred structure block diagram of terminal according to embodiments of the present invention；
Fig. 5 is a kind of preferred flow charts of the uplink synchronisation method of secondary cell according to embodiments of the present invention；
Fig. 6 is a kind of preferred schematic diagram of up sequential according to embodiments of the present invention and the relation of descending sequential.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the embodiment in the application and the feature in embodiment can be mutually combined.
Embodiment 1
Fig. 2 is a kind of preferred structure figure of the uplink synchronous system of secondary cell according to embodiments of the present invention, and it includes：Phase
The base station 202 of mutual communication and terminal 204.
During the up sequential to secondary cell synchronizes, terminal 204 is in the secondary cell of base station 202 according to master
The up sequential in terminal 204 side for the cell sends random access guiding to base station 202；Base station 202 is before receiving Stochastic accessing
After leading, the reception time and main plot of random access guiding is compared in the descending sequential of base station 202 side, and according to than
Relatively result generates sequential adjustment configured information, and wherein, sequential adjustment configured information is used for instruction terminal 204 by secondary cell in terminal
The up sequential of 204 sides is adjusted to the up timing synchronization with main plot in base station 202 side；Sequential is adjusted instruction by base station 202
Information is sent to terminal 204；Terminal 204 is after receiving above-mentioned sequential adjustment configured information according to this sequential adjustment instruction letter
By secondary cell, the up sequential in described terminal 204 side is adjusted to the up timing synchronization in base station 202 side with main plot to breath.
In above-mentioned preferred embodiment, base station can by sequential adjust configured information come to secondary cell in end side
Up sequential is adjusted, so that the up sequential in end side for the secondary cell after adjustment is upper in base station side with main plot
Row timing synchronization, thus solve the technology that cannot carry out up timing synchronization to main plot and secondary cell in prior art ask
Inscribe the proper communication it is ensured that between base station and terminal.
On the basis of system shown in Fig. 2, present invention also offers a kind of preferred base station, as shown in figure 3, this base station
Including：Receiving unit 302, the up sequential transmission in described end side according to main plot in secondary cell for receiving terminal
Random access guiding；Comparing unit 304, is communicated with receiving unit 302, for reception time of described random access guiding with
Described main plot is compared in the descending sequential of described base station side；Signal generating unit 306, is communicated with comparing unit 304, for root
Generate sequential adjustment configured information according to comparative result, wherein, described sequential adjustment configured information is used for indicating described terminal by institute
State the up sequential in described end side for the secondary cell and be adjusted to the up timing synchronization in described base station side with described main plot；Send out
Send unit 308, communicate with signal generating unit 306, for described sequential adjustment configured information is sent to described terminal.At this preferably
Embodiment in, base station can by sequential adjust configured information secondary cell is adjusted in the up sequential of end side,
So that the up sequential in end side for the secondary cell after adjustment and main plot are in the up timing synchronization of base station side, thus solving
Main plot and secondary cell cannot be carried out with the technical problem of up timing synchronization it is ensured that base station and terminal in prior art of having determined
Between proper communication.
Present invention also offers a kind of preferred signal generating unit 306, it includes：First generation module, if connect for described
It is equal to the present sub-frame time started of the descending sequential of described main plot between the time receiving, then generate the first sequential adjustment configured information,
For indicating that described terminal does not execute the operation of the adjustment up sequential in described end side for the described secondary cell or instruction is described
The up sequential in described end side for the secondary cell described in terminal and described main plot are in the up timing synchronization of described base station side；The
Two generation modules, if be more than the present sub-frame time started of the descending sequential of described main plot for the described reception time, give birth to
Become the second sequential adjustment configured information, for indicating that described secondary cell carries by described terminal in the up sequential of described end side
Front it is preferred that calculating the difference between described reception time and the present sub-frame time started of descending sequential of described main plot,
By described terminal, by described secondary cell, the up sequential in described end side shifts to an earlier date length for second sequential adjustment configured information instruction
Time for above-mentioned difference；3rd generation module, if be less than working as of the descending sequential of described main plot for the described reception time
The front subframe time started, then generate the 3rd sequential adjustment configured information, for indicate described terminal by described secondary cell described
The up sequential of end side is delayed it is preferred that calculating the present sub-frame of described reception time and the descending sequential of described main plot
Difference between time started, the second sequential adjustment configured information indicates described secondary cell described terminal in described end side
Up sequential delay the time that length is above-mentioned difference.Configured information is adjusted by above-mentioned different sequential, can be in difference
Scene under exactly the up sequential of secondary cell is adjusted to the up timing synchronization with main plot.
Preferably, comprise, in above-mentioned sequential adjustment configured information, the letter that the up sequential belonging to described secondary cell is organized in advance
Breath, wherein, described up sequential organize in advance for the up sequential in described end side by described secondary cell be adjusted to described
Main plot is in the up timing synchronization of described base station side.In this preferred embodiment, the information organized in advance by up sequential
The adjustment of the up sequential in end side for the secondary cell can rapidly be realized.
Preferably, described main plot and described secondary cell are the cell after carrier aggregation.In this preferred embodiment, make
Present invention may apply to the scene of carrier aggregation.
On the basis of system shown in Fig. 2, present invention also offers a kind of preferred terminal, as shown in figure 4, this terminal
Including：Transmitting element 402, for sending at random in the up sequential of described end side according to main plot in the secondary cell of base station
Access lead；Receiving unit 404, is communicated with transmitting element 402, for receiving the sequential adjustment instruction letter that described base station sends
Breath, wherein, described sequential adjusts configured information by described base station according to reception time of described random access guiding and described master
Comparative result between the descending sequential of described base station side for the cell generates and obtains, and described sequential adjustment configured information is used for indicating
Described terminal by described secondary cell the up sequential in described end side be adjusted to upper in described base station side with described main plot
Row timing synchronization；Adjustment unit 406, is communicated with receiving unit 404, will be described auxiliary for adjusting configured information according to described sequential
The up sequential in described end side for the cell is adjusted to the up timing synchronization in described base station side with described main plot.Excellent at this
In the embodiment of choosing, base station can adjust configured information by sequential and secondary cell is adjusted in the up sequential of end side
Whole, so that the up sequential in end side for the secondary cell after adjustment and main plot are in the up timing synchronization of base station side, from
And solve the technical problem that main plot and secondary cell cannot be carried out in prior art with up timing synchronization it is ensured that base station with
Proper communication between terminal.
Preferably, the present invention is also improved to above-mentioned adjustment unit.Specifically, above-mentioned adjustment unit 406 is being adjusted
Whole secondary cell in the up sequential of described end side, according to described sequential adjust configured information in described secondary cell belonging to
Described secondary cell is adjusted to and belongs to described up sequential in advance in group by the information that up sequential is organized in advance.Preferably implement at this
In example, the information organized in advance by up sequential can rapidly realize the adjustment of the up sequential in end side for the secondary cell.
Embodiment 2
On the basis of system shown in Fig. 2-Fig. 4 and device, present invention also offers a kind of preferred secondary cell is upper
Row synchronous method, as shown in figure 5, the uplink synchronisation method of this secondary cell comprises the following steps：
S502, the base station receiving terminal Stochastic accessing that the up sequential in end side sends according to main plot in secondary cell
Leading；
S504, base station was compared in the descending sequential of base station side with main plot to the reception time of random access guiding；
S506, base station generates sequential adjustment configured information according to comparative result, and sequential adjustment configured information is sent to
Terminal, wherein, sequential adjustment configured information be used for instruction terminal by secondary cell the up sequential in end side be adjusted to lead little
Area is in the up timing synchronization of base station side.
In this preferred embodiment, base station can adjust configured information come upper in end side to secondary cell by sequential
Row sequential is adjusted, so that the up sequential in end side for the secondary cell after adjustment is up in base station side with main plot
Timing synchronization, thus solving the technical problem that main plot and secondary cell cannot be carried out in prior art with up timing synchronization,
Ensure that the proper communication between base station and terminal.
Preferably, base station was compared in the descending sequential of base station side with main plot to the reception time of random access guiding
Step include：Calculate the reception time and main plot difference between the present sub-frame time started of the descending sequential of base station side
Value；Base station includes according to the step that comparative result generates sequential adjustment configured information：If the time of reception is equal to main plot in base station
The present sub-frame time started of the descending sequential of side, then generate the first sequential adjustment configured information, do not execute for instruction terminal
The operation of the adjustment up sequential in end side for the secondary cell or secondary cell described in the described terminal of instruction are upper in described end side
Row sequential and described main plot are in the up timing synchronization of described base station side；If the time of reception is more than main plot under base station side
The present sub-frame time started of row sequential, then generate the second sequential adjustment configured information, for instruction terminal by secondary cell at end
The up sequential of side is in advance it is preferred that the present sub-frame calculating the described reception time with the descending sequential of described main plot is opened
Difference between time beginning, the second sequential adjustment configured information indicates described secondary cell described terminal in described end side
Up sequential shifts to an earlier date the time that length is above-mentioned difference；If receive the time be less than main plot base station side descending sequential current
The subframe time started, then generate the 3rd sequential adjustment configured information, for instruction terminal by secondary cell end side up when
Sequence delay it is preferred that calculate the descending sequential of described reception time and described main plot the present sub-frame time started between
Difference, described secondary cell is delayed by the second sequential adjustment configured information instruction by described terminal in the up sequential of described end side
Length is the time of above-mentioned difference.Configured information is adjusted by above-mentioned different sequential, can under different scenes exactly
The up sequential of secondary cell is adjusted to the up timing synchronization with main plot.
Preferably, comprise, in sequential adjustment configured information, the information that the up sequential belonging to secondary cell is organized in advance, wherein, on
Row sequential organize in advance for the up sequential in end side by secondary cell be adjusted to main plot base station side up sequential with
Step.In this preferred embodiment, the information organized in advance by up sequential can rapidly realize secondary cell in end side
The adjustment of up sequential.
Preferably, after sequential adjustment configured information is sent to terminal, also include：Terminal receives sequential adjustment and refers to
Show information；Terminal adjusts configured information according to sequential and is adjusted to main plot in base station secondary cell in the up sequential of end side
The up timing synchronization of side.
Preferably, terminal according to sequential adjust configured information by secondary cell the up sequential in described end side be adjusted to
The step of the up timing synchronization in base station side for the main plot includes：Terminal is according to belonging to sequential adjusts the secondary cell in configured information
The information organized in advance of up sequential secondary cell be adjusted to belong to up sequential in advance in group.
Preferably, main plot and secondary cell are the cell after carrier aggregation.So that the present invention in this preferred embodiment
Go for the scene of carrier aggregation.
The uplink synchronisation method of specific secondary cell is below described.
(1) scene 1
Under this scene, the uplink synchronisation method of secondary cell comprises the following steps：
Step 1：ENB sends the RRC signaling of the Scell including configuring to UE, and notifies the special of use on this Scell of UE
Random access guiding.
Step 2：ENB sends activation command to UE for this Scell.
Step 3：After UE receives the activation signaling of eNB, Scell initiates to connect at random using special random access preamble
Enter, wherein, the transmission time of random access guiding (Random Access Preamble) may be referred to the up sequential of Pcell
(UL timing).
Step 4：ENB receives random access guiding.Now, random access guiding is received time and eNB by eNB
The downgoing time of Pcell compares, and selects TAgroup (up sequential group in advance) according to comparative result for Scell, for example,
As shown in fig. 6, eNB can determine the TAgroup corresponding TA value belonging to Scell.
Specifically, the time difference of the up sequential for UE for the TA value of Pcell and descending sequential, during UE activation SCell, will
It is adjusted to identical with the up sequential of Pcell at the beginning of its up sequential, and sends special random access preamble, eNB receives
To after this random access preamble, can calculate receive this random access preamble time and
The difference of Pcell DL timing at eNB is delta TA.If delta is TA=0, then the up sequential of this Scell
Identical with the up sequential of Pcell；If delta TA ＞ 0, after a while；If delta TA ＜ 0, shift to an earlier date.Delta accordingly
Value, eNB can select suitable TAgroup for UE.The Scell of such as deltata=0, can select and mono- group of Pcell.
Additionally, according to deltata value, eNB can send the MAC order of adjustment ULtiming, such as can be adjusted to deltata to UE
Value.
Step 5：ENB sends MAC signaling to UE, for notifying the TAgroup belonging to this Scell of UE, and configures TAT, its
In, this MAC signaling includes the TA value for adjustment of eNB generation.
Step 6：After UE receives this MAC signaling, the TA group according to belonging to TA value adjusts Scell is so that the UL of Scell
Timing is resynchronized to the UL timing of Pcell.
Step 7：UE activates this Scell, including SRS transmission, for this Scell send channel quality instruction/pre-coding matrix/
Order instruction/precoding type instruction (CQI/PMI/RI/PTI, Channel Quality Indicator/Precoding
Matrix/Rank Indicator/Precoding Type Indicator) report, the PDCCH on Scell monitors, and starts it
PDCCH monitoring for this Scell on its cell etc..
(2) scene 2
Under this scene, the uplink synchronisation method of secondary cell comprises the following steps：
Step 1：ENB sends the RRC signaling increasing Scell to UE.
Step 2：ENB notifies the special random access preamble of this Scell of UE.
Step 3：After UE receives RRC signaling, the correlation function of configuration UE.
Step 4：ENB sends the activation signaling of this Scell to UE.
Step 5：After UE receives the activation signaling of eNB, Scell initiates to connect at random using special random access guiding
Enter, wherein, the transmission time of random access guiding (random access preamble) may be referred to the UL of Pcell
timing.
Step 6：ENB receives random access guiding.Now, random access guiding is received time and eNB by eNB
The downgoing time of Pcell compares, and selects TAgroup (up sequential group in advance) according to comparative result for Scell, wherein,
This TAgroup includes：TAgroup group number, TAT configures.For example, as shown in fig. 6, eNB can determine belonging to Scell
TAgroup corresponding TA value.
Specifically, the time difference of the up sequential for UE for the TA value of Pcell and descending sequential, during UE activation SCell, will
It is adjusted to identical with the up sequential of Pcell at the beginning of its up sequential, and sends special random access preamble, eNB receives
To after this random access preamble, can calculate receive this random access preamble time and
The difference of Pcell DL timing at eNB is delta TA.If delta is TA=0, then the up sequential of this Scell
Identical with the up sequential of Pcell；If delta TA ＞ 0, after a while；If delta TA ＜ 0, shift to an earlier date.Delta accordingly
Value, eNB can select suitable TAgroup for UE.The Scell of such as delta ta=0, can select and mono- group of Pcell.
Additionally, according to deltata value, eNB can send the MAC order of adjustment UL timing, such as can be adjusted to UE
Deltata value.
Step 7：ENB sends MAC signaling to UE, for notifying the TAgroup belonging to this Scell of UE, and configures TAT, its
In, this MAC signaling includes the TA value for adjustment of eNB generation.
Step 8：After UE receives this MAC signaling, the TA group according to belonging to TA value adjusts Scell is so that the UL of Scell
Timing is resynchronized to the UL timing of Pcell.
Step 9：UE activates this Scell, including SRS transmission, for this Scell send channel quality instruction/pre-coding matrix/
Order instruction/precoding type instruction (CQI/PMI/RI/PTI, Channel Quality Indicator/Precoding
Matrix/Rank Indicator/Precoding Type Indicator) report, the PDCCH on Scell monitors, and starts it
PDCCH monitoring for this Scell on its cell etc..
(3) scene 3
Under this scene, the uplink synchronisation method of secondary cell comprises the following steps：
Step 1：ENB sends the RRC signaling increasing Scell to UE.
Step 2：After UE receives RRC signaling, the correlation function of configuration UE.
Step 3：ENB sends the activation signaling of this Scell to UE, and this activation signaling includes special random access preamble.
Step 4：After UE receives the activation signaling of eNB, Scell initiates to connect at random using special random access preamble
Enter, wherein, the UL timing of the transmission time reference Pcell of random access guiding (random access preamble).
Step 5：ENB receives random access guiding.Now, random access guiding is received time and eNB by eNB
The downgoing time of Pcell compares, and selects TAgroup (up sequential group in advance) according to comparative result for Scell, wherein,
This TAgroup includes：TAgroup group number, TAT configures.For example, as shown in fig. 6, eNB can determine belonging to Scell
TAgroup corresponding TA value.
Specifically, the time difference of the up sequential for UE for the TA value of Pcell and descending sequential, during UE activation SCell, will
It is adjusted to identical with the up sequential of Pcell at the beginning of its up sequential, and sends special random access preamble, eNB receives
To after this random access preamble, can calculate receive this random access preamble time and
The difference of Pcell DL timing at eNB is delta TA.If delta is TA=0, then the up sequential of this Scell
Identical with the up sequential of Pcell；If delta TA ＞ 0, after a while；If delt aTA ＜ 0, shift to an earlier date.Delta accordingly
Value, eNB can select suitable TAgroup for UE.The Scell of such as deltata=0, can select and mono- group of Pcell.
Additionally, according to deltata value, eNB can send the MAC order of adjustment ULtiming, such as can be adjusted to deltata to UE
Value.
Step 6：ENB sends MAC signaling to UE, for notifying the TAgroup belonging to this Scell of UE, and configures TAT, its
In, this MAC signaling includes the TA value for adjustment of eNB generation.
Step 7：After UE receives this MAC signaling, the TA group according to belonging to TA value adjusts Scell is so that the UL of Scell
Timing is resynchronized to the UL timing of Pcell.
Step 8：UE activates this Scell, including SRS transmission, for this Scell send channel quality instruction/pre-coding matrix/
Order instruction/precoding type instruction (CQI/PM/RI/PTI, Channel Quality Indicator/Precoding
Matrix/Rank Indicator/Precoding Type Indicator) report, the PDCCH on Scell monitors, and starts it
PDCCH monitoring for this Scell on its cell etc..
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realizing, they can concentrate on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
To be executed by computing device in the storage device, and in some cases, can be with different from shown in order execution herein
The step going out or describing, or they are fabricated to respectively each integrated circuit modules, or by the multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of uplink synchronisation method of secondary cell is it is characterised in that include：
The base station receiving terminal random access guiding that the up sequential in described end side sends according to main plot in secondary cell；
Described base station was entered in the descending sequential of described base station side with described main plot to the reception time of described random access guiding
Row compares；
Described base station generates sequential adjustment configured information according to comparative result, and described sequential adjustment configured information is sent to institute
State terminal, wherein, described sequential adjustment configured information be used for indicating described terminal by described secondary cell in described end side
Row sequential is adjusted to the up timing synchronization with described main plot in described base station side.
2. method according to claim 1 it is characterised in that
Described base station was entered in the descending sequential of described base station side with described main plot to the reception time of described random access guiding
The step that row compares includes：
Calculate described reception time and described main plot between the present sub-frame time started of the descending sequential of described base station side
Difference；
Described base station includes according to the step that comparative result generates sequential adjustment configured information：
If the described reception time is equal to the present sub-frame time started of the descending sequential in described base station side for the described main plot, give birth to
Become the first sequential adjustment configured information, up in described end side for indicating that described terminal does not execute the described secondary cell of adjustment
Sequential operation or indicate described terminal described in the up sequential in described end side for the secondary cell with described main plot described
The up timing synchronization of base station side；
If the described reception time is more than the present sub-frame time started of the descending sequential in described base station side for the described main plot, give birth to
Become the second sequential adjustment configured information, for indicating that described secondary cell carries by described terminal in the up sequential of described end side
Before；
If the described reception time is less than the present sub-frame time started of the descending sequential in described base station side for the described main plot, give birth to
Become the 3rd sequential adjustment configured information, for indicating that described secondary cell prolonged by described terminal in the up sequential of described end side
Afterwards.
3. method according to claim 1 is it is characterised in that comprise described secondary cell in described sequential adjustment configured information
The information that affiliated up sequential is organized in advance, wherein, described up sequential organize in advance for by described secondary cell in described terminal
The up sequential of side is adjusted to the up timing synchronization with described main plot in described base station side.
4. according to the method in any one of claims 1 to 3 it is characterised in that described sequential is being adjusted configured information
After being sent to described terminal, also include：
Described terminal receives described sequential adjustment configured information；
Described terminal adjusts configured information according to described sequential and is adjusted to described secondary cell in the up sequential of described end side
With described main plot described base station side up timing synchronization.
5. method according to claim 4 is it is characterised in that described terminal adjusts configured information by institute according to described sequential
State the up sequential in described end side for the secondary cell and be adjusted to the up timing synchronization in described base station side with described main plot
Step includes：
The information that up sequential according to belonging to described sequential adjusts the described secondary cell in configured information for the described terminal is organized in advance
Described secondary cell is adjusted to and belongs to described up sequential in advance in group.
6. method according to claim 1 is it is characterised in that described main plot and described secondary cell are for after carrier aggregation
Cell.
7. a kind of base station is it is characterised in that include：
Receiving unit, for receiving terminal in secondary cell the up sequential in described end side according to main plot send random
Access lead；
Comparing unit, for described random access guiding receive time and described main plot described base station side descending when
Sequence is compared；
Signal generating unit, for generating sequential adjustment configured information according to comparative result, wherein, described sequential adjustment configured information is used
In the described terminal of instruction, by described secondary cell, the up sequential in described end side is adjusted to described main plot in described base station
The up timing synchronization of side；
Transmitting element, for being sent to described terminal by described sequential adjustment configured information.
8. base station according to claim 7 is it is characterised in that described signal generating unit includes：
First generation module, if the present sub-frame being equal to the descending sequential of described main plot for the described reception time starts
Between, then generate the first sequential adjustment configured information, adjust described secondary cell in described terminal for indicating that described terminal does not execute
The operation of the up sequential of side or the up sequential in described end side for the secondary cell described in the described terminal of instruction are little with described master
Area is in the up timing synchronization of described base station side；
Second generation module, if the present sub-frame being more than the descending sequential of described main plot for the described reception time starts
Between, then generate the second sequential adjustment configured information, for indicating described terminal, described secondary cell is up in described end side
Sequential shifts to an earlier date；
3rd generation module, if the present sub-frame being less than the descending sequential of described main plot for the described reception time starts
Between, then generate the 3rd sequential adjustment configured information, for indicating described terminal, described secondary cell is up in described end side
Sequential is delayed.
9. a kind of terminal is it is characterised in that include：
Transmitting element, in the secondary cell of base station, according to main plot, the up sequential in described end side sends Stochastic accessing
Leading；
Receiving unit, for receiving the sequential adjustment configured information that described base station sends, wherein, described sequential adjusts configured information
By described base station according to described random access guiding receive time and described main plot described base station side descending sequential it
Between comparative result generate and obtain, described sequential adjustment configured information be used for indicating described terminal by described secondary cell at described end
The up sequential of side is adjusted to the up timing synchronization with described main plot in described base station side；
Described secondary cell is adjusted in the up sequential of described end side by adjustment unit for adjusting configured information according to described sequential
It is made into the up timing synchronization in described base station side with described main plot.
10. terminal according to claim 9 is it is characterised in that described adjustment unit is additionally operable to be adjusted according to described sequential
Described secondary cell is adjusted to and belongs on described by the information that the up sequential belonging to described secondary cell in configured information is organized in advance
Row sequential is in advance in group.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110279985.2A CN103024890B (en) | 2011-09-20 | 2011-09-20 | Method, evolved node B and terminal for uplink synchronization of secondary cell |
| PCT/CN2012/075673 WO2013040905A1 (en) | 2011-09-20 | 2012-05-17 | Method, base station and terminal for secondary cell uplink synchronization |
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| CN201110279985.2A CN103024890B (en) | 2011-09-20 | 2011-09-20 | Method, evolved node B and terminal for uplink synchronization of secondary cell |
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| US9807718B2 (en) | 2013-04-15 | 2017-10-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Secondary cell synchronization for carrier aggregation |
| WO2015000104A1 (en) * | 2013-07-01 | 2015-01-08 | 华为技术有限公司 | Air interface synchronization method, base stations, control apparatus and wireless communication system |
| JP2015088997A (en) * | 2013-10-31 | 2015-05-07 | 株式会社Ｎｔｔドコモ | Mobile station |
| CN106162729B (en) * | 2015-04-09 | 2019-08-30 | 电信科学技术研究院 | A kind of instruction measurement reports and measures the method and apparatus reported |
| CN106937338B (en) * | 2015-12-31 | 2020-01-10 | 中国电信股份有限公司 | Link reconstruction method and system |
| CN108512639B (en) * | 2017-02-28 | 2020-05-26 | 深圳市中兴微电子技术有限公司 | Method and device for sending leader sequence |
| CN110312294B (en) * | 2019-05-10 | 2021-07-23 | 展讯通信（上海）有限公司 | Timing adjustment method, device and terminal for secondary cell activation process |
| CN114303428A (en) * | 2019-11-20 | 2022-04-08 | Oppo广东移动通信有限公司 | Method for determining timestamp, terminal equipment, access network node and core network equipment |
| CN116744428A (en) * | 2022-03-02 | 2023-09-12 | 中兴通讯股份有限公司 | Maintenance method, terminal and computer readable storage medium for uplink time sequence |
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| WO2009098960A1 (en) * | 2008-02-04 | 2009-08-13 | Sharp Kabushiki Kaisha | Mobile communication system, base station device, mobile station device, and mobile communication method |
| CN101646234A (en) * | 2009-09-01 | 2010-02-10 | 中兴通讯股份有限公司 | Obtaining method of timing lead |
| CN102076058A (en) * | 2011-02-23 | 2011-05-25 | 电信科学技术研究院 | Random access method under large time delay and terminal |
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| CN101198151B (en) * | 2006-12-04 | 2011-03-30 | 华为技术有限公司 | Random access method and mobile station |
| WO2009020109A1 (en) * | 2007-08-07 | 2009-02-12 | Sharp Kabushiki Kaisha | Mobile communication system, mobile station device, base station device, communication method, and communication control method |
| TWI624187B (en) * | 2009-11-19 | 2018-05-11 | 內數位專利控股公司 | Component carrier activation/deactivation in multi-carrier systems |
| KR101512388B1 (en) * | 2010-01-08 | 2015-04-16 | 인터디지탈 패튼 홀딩스, 인크 | Maintaining time alignment with multiple uplink carriers |
| CN102118801B (en) * | 2011-03-31 | 2013-07-24 | 电信科学技术研究院 | Method and device for unlink transmission in multicarrier aggregation system |
| CN102123516B (en) * | 2011-03-31 | 2013-11-06 | 电信科学技术研究院 | Random access method and equipment based on multiple uplink timing advances |
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| WO2009098960A1 (en) * | 2008-02-04 | 2009-08-13 | Sharp Kabushiki Kaisha | Mobile communication system, base station device, mobile station device, and mobile communication method |
| CN101646234A (en) * | 2009-09-01 | 2010-02-10 | 中兴通讯股份有限公司 | Obtaining method of timing lead |
| CN102076058A (en) * | 2011-02-23 | 2011-05-25 | 电信科学技术研究院 | Random access method under large time delay and terminal |
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