CN102932880B - Cell selecting method and device in multi-carrier communications systems - Google Patents
Cell selecting method and device in multi-carrier communications systems Download PDFInfo
- Publication number
- CN102932880B CN102932880B CN201110226036.8A CN201110226036A CN102932880B CN 102932880 B CN102932880 B CN 102932880B CN 201110226036 A CN201110226036 A CN 201110226036A CN 102932880 B CN102932880 B CN 102932880B
- Authority
- CN
- China
- Prior art keywords
- cell
- secondary cell
- time reference
- control elements
- packet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 60
- 238000004891 communication Methods 0.000 title claims abstract description 31
- 230000006854 communication Effects 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 12
- 238000001994 activation Methods 0.000 description 20
- 230000001360 synchronised effect Effects 0.000 description 18
- 230000004913 activation Effects 0.000 description 16
- 230000002776 aggregation Effects 0.000 description 12
- 238000004220 aggregation Methods 0.000 description 12
- 230000020411 cell activation Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000011664 signaling Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000977 initiatory effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000007420 reactivation Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 108700026140 MAC combination Proteins 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides the cell selecting method in a kind of multi-carrier communications systems and device, in this method, packet for only including secondary cell, UE and/or base station select the cell for receiving Timing Advance TA control elements and/or the cell as time reference respectively for each such packet.The present invention is solved in correlation technique after multiple TA packets are introduced, only comprising secondary cell packet in secondary cell how access time reference cell and/or how to select receive Timing Advance TA control elements cell the problem of, the program has been adapted in multi-carrier communications systems to more TA and the demand being grouped more, more accurate TA controls can be provided for each packet, so that each UE upstream data is each fallen within the reception time window of base station when reaching base station, the losing probability of upstream data is reduced, thus improves the service performance of whole system.
Description
Technical field
The present invention relates to the communications field, in particular to the cell selecting method in a kind of multi-carrier communications systems and
Device.
Background technology
Draw in advanced long-term evolution system (Long Term Evolution Advance, referred to as LTE-Advanced)
Many new technologies are entered to meet IMT-Advanced primary demand, one technology of most important of which is exactly carrier aggregation.
Because current radio spectrum resources are very in short supply, and IMT-Advanced requires that the index of peak rate is higher (high
100Mbps is supported under mobility, 1Gbps is supported under Hypomobility), the bandwidth with current LTE standard maximum 20MHz is can not
Meet IMT-Advanced requirements, so needing to extend to more high bandwidth, such as 40MHz, 60MHz, even more high.Improve band
One of wide and peak rate method is that frequency domain is expanded, such as several LTE frequency bands based on 20MHz are passed through " carrier wave
The mode of polymerization " carries out bandwidth expansion, and here it is the essence of carrier aggregation technology.Therefore, LTE-Advanced systems are fallen within
Multicarrier system.
In LTE-Advanced systems, the carrier wave for participating in polymerization is referred to as component carrier (Component Carrier), uses
Family equipment (UserEquipment, referred to as UE) can carry out transmitting-receiving transmission on multiple component carriers between eNB simultaneously.
Component carrier can use LTE defined frequency ranges, can also use the frequency range specially increased newly for LTE-Advanced.It is based on
The nervous situation of frequency spectrum resource at present, it is impossible to always there is continuous component carrier on frequency domain to distribute to operator's use, therefore divide
Loading gage ripple can be continuous or discontinuous on frequency band.Main plot and secondary cell are introduced in carrier aggregation
Concept, main plot refer to UE and initiate RRC connections foundation or RRC connection reconstructions or the small of main plot is designated as in handoff procedure
Area；Secondary cell refers to the frequency for being different from main plot, and is configured after UE enters RRC connection status, extra wireless for providing
Resource.In carrier aggregation system, serving cell includes main serving cell and auxiliary serving cell.
After introducing carrier aggregation technology, UE can be simultaneously in multiple serving cells in RRC connected states (RRC_CONNECTED)
On carry out transmitting-receiving transmission, but for Idle state (RRC_IDLE) UE, as LTE, be only capable of it is resident on one cell, UE
After being successfully accessed in the cell, i.e. after UE establishes RRC connections in the cell, according to business needs, base station can be by special
It is the newly-increased cell of UE distribution with RRC signaling, after distributing these newly-increased cells, at this, to increase cell newly not enterprising immediately by base station and UE
Row data transmit-receive, i.e. base station do not increase newly at this and send business datum to UE in cell, and UE preserves the configuration information in the cell,
Also business datum is sent to base station not in the cell, waits the further action of base station.Subsequent base stations can be according to business
Need to activate the cell, after the cell is activated, base station and UE could carry out data transmit-receive in the cell.
In LTE system, in order to realize and keep the uplink synchronous between user equipment and base station, base station according to base station with
Propagation delay time between each user equipment sends Timing Advance (Timing Advance, referred to as TA) and gives each user equipment,
The Timing Advance that user equipment is sent according to base station shifts to an earlier date or postponed the opportunity of respective uplink, so as to make up user terminal
To the propagation delay time of base station so that the upward signal of different user devices all reaches base station within the reception window of base station.Such as
Fruit is that the propagation delay time difference of each minizone in the cell that some UE is configured is larger, can not use identical TA, then carrying
Just need to introduce more TA concept in ripple paradigmatic system.According to the situation using TA, the UE using identical TA can be placed on together
In one group, the concept of packet is thus introduced.
In carrier aggregation system before, all carrier waves use identical TA, and main plot controls member as TA is received
The cell of element, while the component carrier where it also serves as reference carrier when UE upward signal is sent, hereinafter referred to as time
Reference carrier, corresponding cell are referred to as time reference cell.However, after the concept of packet and more TA is introduced, due to existing not
Same packet and different TA, if main plot is still used only as the cell and/or time reference for receiving TA control elements
Cell, then it can not meet packet and more TA requirement so that the cell that propagation delay time differs larger can not be using suitable TA's
Carry out uplink opportunity adjustment, so as to cause base station side can not receive cell portion upstream data situation,
Cause the loss of upstream data.
The content of the invention
It is a primary object of the present invention to provide cell selecting method and device in a kind of multi-carrier communications systems, so that
Solve the above problems less.
One aspect of the present invention provides the cell selecting method in a kind of multi-carrier communications systems, including：For only
Packet comprising secondary cell, UE and/or base station for each packet select respectively cell for receiving TA control elements and/
Or the cell as time reference.
Another aspect of the present invention provides the cell selecting apparatus in a kind of carrier communication system, including：Select mould
Block, for the packet for only including secondary cell, select the cell for receiving TA control elements respectively for each packet
And/or the cell as time reference.
By the present invention, the packet for only including secondary cell, selection is used respectively for each this packet for UE and/or base station
In the cell and/or cell as time reference that receive TA control elements, solve in correlation technique and introducing multiple TA
After packet, how how access time reference cell and/or selects to receive the time for secondary cell only in the packet comprising secondary cell
The problem of cell of lead TA control elements, the program have been adapted in multi-carrier communications systems to more TA and the need being grouped more
Ask, more accurate TA controls can be provided for each packet, so that each UE upstream data is equal when reaching base station
Fall into the reception time window of base station, reduce the losing probability of upstream data, thus improve the service performance of whole system.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the cell selecting method in multi-carrier communications systems according to embodiments of the present invention；
Fig. 2 is the schematic diagram of the covering of carrier aggregation according to embodiments of the present invention；
Fig. 3 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 1；
Fig. 4 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 2；
Fig. 5 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 3；
Fig. 6 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 4；
Fig. 7 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 5；And
Fig. 8 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 6.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
In carrier aggregation system before, all carrier waves use identical TA, and main plot controls member as TA is received
Element cell, while also serve as UE upward signal send when reference carrier.Only make after the concept of packet and more TA is introduced
It is inadequate, it is necessary to choose one in each packet by the use of main plot as TA control elements and/or time reference carrier wave is received
Cell is as reception TA control elements and/or time reference carrier wave.In the packet comprising main plot, it can be continuing with leading small
Area is as reception TA control elements and/or time reference carrier wave；In only the group of multiple secondary cells is included, one can be selected
(being chosen and in the case that both are different receiving the cell of TA control elements and time reference cell, may be two) is auxiliary
Reception TA control element and/or time reference carrier wave of the cell as the group.
Fig. 1 is the schematic diagram of the cell selecting method in multi-carrier communications systems according to embodiments of the present invention, such as Fig. 1 institutes
Show, in this method, the packet for only including secondary cell, UE and/or base station select to be used to connect respectively for each such packet
Receive the cell of TA control elements and/or the cell as time reference.
With it, more TA carrier aggregation systems each can only include multiple secondary cells by UE and/or base station
Packet select the cell for receiving TA control elements and/or the cell as time reference respectively.In actual applications, it is right
In the packet for only including secondary cell, can select to be used to receive TA control elements for the packet in the secondary cell that packet includes
Secondary cell and/or secondary cell as time reference, or, main plot can also be grouped for receiving as the secondary cell
The cell of TA control elements and/or the cell as time reference.It this method solve after multiple TA packets are introduced, only wrap
How how access time reference cell and/or selects to receive Timing Advance TA controls for secondary cell in packet containing secondary cell
The problem of cell of element, the program have been adapted to more TA and the demand being grouped more in multi-carrier communications systems, can be each
Packet provides more accurate TA controls, so that each UE upstream data each falls within the reception of base station when reaching base station
In time window, the losing probability of upstream data is reduced, thus improves the service performance of whole system.
It should be noted that in description and Fig. 1 more than, for the packet comprising main plot, main carrier work have selected
For for receiving TA control elements and/or cell as time reference, still, proposed in the embodiment of the present invention for only wrapping
The cell selecting method of packet containing secondary cell, how to select to be used to receive TA control elements for the packet comprising main plot
For the packet comprising main plot, selected according to prior art and/or the cell as time reference is not particularly limited
Select main plot and other cells are still selected using other method, do not influence the implementation of this method, nor affect on it and solve
After introducing multiple TA packet, secondary cell only in the packet comprising secondary cell how access time reference cell and/or how
Selection receives the problem of cell of Timing Advance TA control elements.
In actual applications, it can select the cell for receiving TA control elements using a variety of methods and/or be used as
The cell of time reference, such as：
Mode one, base station are used to receive the cell of TA control elements and/or as time reference to user device configuration
Cell.Preferably, base station can for the grouping information of user device configuration secondary cell and each cell when, carry out it is this configuration behaviour
Make.In this approach, when being the grouping information that UE configures secondary cell and cell in base station, can by RRC related news (for
Simplicity can use RRC connections reallocation message) configuration receives TA control elements and/or the cell mark as time reference cell
Know.UE upon receipt under secondary cell activation/deactivation state all may be used by storage configuration information, the cell for being configured as time reference
So that as time reference cell, the secondary cell for being configured as receiving TA control elements is used as reception TA control elements under activated state
Cell, or it is also assumed that receive TA control elements cell be just used as time reference cell.
Mode two, the secondary cell that RACH RACH processes are performed in selection packet are used as receiving TA control members
The cell of element and/or the cell as time reference.In this approach, TA controls are received in packet of the base station to only including secondary cell
Element processed and/or as time reference cell without explicit signal deployment, but choose in the packet execution RACH mistakes
The cell of journey is as reception TA control elements and/or time reference cell., it is necessary to have one small in the group for only including secondary cell
Area carries out uplink synchronous process upon activation so that all cells in the packet all enter uplink sync status, the cell
It can be used as and receive TA control elements and/or time reference cell.
Mode three, select the secondary cell that cell ID is minimum or maximum in all secondary cells of packet to be used as and join as the time
The secondary cell examined, or, the minimum or maximum secondary cell of cell ID, which is used as, in the secondary cell activated in selection packet is used for
Receive the secondary cell of TA control elements and/or the secondary cell as time reference.In this approach, base station is carried out without using signaling
The minimum or maximum secondary cell of cell ID is joined as the time in explicit instruction, base station and the only packet comprising secondary cell of UE acquiescences
The secondary cell examined；Or that cell ID has been activated in secondary cell in base station and the only packet comprising secondary cell of UE acquiescences is minimum or most
Big secondary cell is as the secondary cell for receiving TA control elements and/or time reference.
The secondary cell that any of mode four, selection packet has activated is as the secondary cell for receiving TA control elements
And/or the secondary cell as time reference, in this approach, if the secondary cell activated is multiple, it can be selected by UE
Selection result is notified into base station afterwards, so as to ensure the uniformity of the cell of both selections, is easy to follow-up synchronizing process.
Preferably, the cell as time reference of selection for secondary cell when, activated and not in selected secondary cell
, can be as the secondary cell for being used as time reference in packet in the case of activation；Selection be used for receive TA control elements
Cell is only in the case where having activated as the cell for receiving TA control elements.
If the cell selected is currently not in state of activation, in order to receive TA control elements, it may be necessary to again
A secondary cell activated is selected, therefore, is used to receive TA control elements and/or as time reference for packet selection
After secondary cell, being used to receive TA control elements and/or secondary cell un-activation as time reference or gone in selection
In the case of activation, a secondary cell is reselected in the secondary cell activated in a packet and is used as receiving TA control elements
And/or the secondary cell as time reference, or, a secondary cell conduct is reselected in the secondary cell activated in a packet
For receiving the secondary cell of TA control elements, retain using the secondary cell selected originally as the secondary cell as time reference.
In actual applications, the mode one to four of the above can be mutually combined during selection first and gravity treatment and make
With, such as：
(1) employing mode one select for receive TA control elements and/or as the secondary cell of time reference after,
In the case of being used to receive TA control elements and secondary cell un-activation as time reference or be deactivated of selection, base station
Pass-through mode one is used to receive the auxiliary small of TA control elements to user device configuration again in the secondary cell activated in a packet
Area and/or the secondary cell as time reference, or, pass-through mode two in the secondary cell that user equipment has activated in a packet,
Mode three or mode four reselect the secondary cell for receiving TA control elements and/or the secondary cell as time reference.
(2) employing mode two select for receive TA control elements and/or as the secondary cell of time reference after,
In the case of being used to receive TA control elements and secondary cell un-activation as time reference or be deactivated of selection, user
Pass-through mode two, mode three or mode four are reselected for receiving TA control members in the secondary cell that equipment has activated in a packet
The secondary cell of element and/or the secondary cell as time reference.
(3) employing mode three select for receive TA control elements and/or as the secondary cell of time reference after,
In the case of being used to receive TA control elements and secondary cell un-activation as time reference or be deactivated of selection, user
Pass-through mode three or mode four are reselected for receiving the auxiliary of TA control elements in the secondary cell that equipment has activated in a packet
Cell and/or the secondary cell as time reference.
In addition, the secondary cell selected first from unactivated state change for the state that has activated in the case of, user
The secondary cell that equipment can also be recovered to select first as packet in be used for receive TA control elements and/or as time reference
Cell.
In above method, more TA carrier aggregation system is chosen in the packet for only including secondary cell receives TA control members
Element and/or the cell as time reference.This method has been changed to the whole description agreement of multicarrier system, i.e., clearly more TA
Selection one is needed to receive TA control elements and/or as time reference in the packet for only including secondary cell in multicarrier system
Cell；Simultaneously for the ease of the configuration process of mode one, UE RRC agreements can be modified, that is, need addition to configure
Parameter, which indicates, receives TA control elements and/or the cell as time reference in the group；Furthermore it is also possible to by MAC protocol
It is modified and receives the selection principle of TA control elements and/or cell as time reference clearly to choose.
Mode five：Selection main plot is as the packet for only including secondary cell for receiving TA control elements and/or being used as
The cell of time reference.UE can receive the TA control elements for the adjustment of secondary cell packet time on main plot, and this is controlled
Element processed is applied to be grouped in secondary cell.
It should be noted that for comprising it is multiple only including secondary cell packets in the case of, can for different packets
By be used uniformly in a manner of a kind of identical be respectively cell that each packet selection is used to receiving TA control elements and/or as when
Between the cell that refers to；Can also each be grouped it is independent choose respective mode select cell for receiving TA control elements and/
Or the cell as time reference, selected mode are possibly different from, it is also possible to which part is identical, it is of course also possible to all
It is identical.
The embodiment of the present invention additionally provides the cell selecting apparatus in a kind of carrier communication system, including：Selecting module, use
In for each only the packet comprising secondary cell selects cell for receiving Timing Advance TA control elements and/or is used as respectively
The cell of time reference.The device can be located in base station and/or user equipment.
The device can perform the method described by above example, adapt in multi-carrier communications systems to more TA and more
The demand of packet, more accurate TA controls can be provided for each packet, so that each UE upstream data reaches
Each fallen within during base station in the reception time window of base station, reduce the losing probability of upstream data, thus improve whole system
Service performance.
Fig. 2 is the schematic diagram of the covering of carrier aggregation according to embodiments of the present invention.As shown in Fig. 2 serving cell 1 (under
Line frequency point f1, up frequency f1 '), referred to as CC1 (DL f1, UL f1 ')；Serving cell 2 (descending frequency f2, up frequency
F2 '), referred to as CC2 (DL f2, UL f2 ')；Serving cell 3 (descending frequency f3, up frequency f3 ')；Serving cell 4 is (descending
Frequency f4, up frequency f4 ') carrier aggregation can be carried out.User equipment (UE) resides on CC1 and RRC connections is initiated on CC1
Process, CC1 is considered UE main serving cell, and CC1 is in group 1.Serving cell CC2, CC3 and CC4 are secondary cell, in group 2
In.CC1 to CC4 cell designation is respectively 1~4.It is double with frequency division by embodiment 1-5 below by taking the scene shown in Fig. 2 as an example
Overloading provided in an embodiment of the present invention is described in detail exemplified by work pattern (Frequency Division Duplex, referred to as FDD)
Cell selection scheme in communi-cation system, embodiment 1-5 combine the technical scheme of above-mentioned multiple preferred embodiments.
Embodiment 1
Fig. 3 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 1, such as Fig. 3 institutes
Show, comprise the following steps：
Step 301：UE initiates RRC connections on CC1, and base station configures CC2 in RRC connection reallocation messages to UE, CC3 and
CC4 information and grouping information.CC1 is main serving cell, and it is auxiliary serving cell to be grouped 1, CC2~CC4, is grouped 2；Base
Stand while CC2 is configured in RRC connection reallocation messages to be responsible for receiving TA control elements and/or as time reference in group 2
Secondary cell；
Step 302：CC3 is activated in base station when UE is in RRC connection status, after CC3 completes uplink synchronous, CC3 conducts
The cell of TA and/or time reference is safeguarded in group 2；Now can also be by CC2 as time reference cell；
Step 303：Base station activates CC2 and CC4 when UE is in RRC connection status, according to the configuration information of base station, CC2
As the cell of reception TA control elements and/or time reference in 2 is organized, now CC3 is not re-used as receiving TA control elements in group 2
And/or the cell of time reference；
Step 304：When CC2 packet data inactivity timer time-out, CC2 is deactivated.Now base station is sent at once deactivates MAC
Control element deactivates CC3 and CC4；
Step 305：It is receive TA control elements and/or time reference small that base station, which sends RRC signaling notice UE changes CC3,
Area；
Or UE voluntarily deactivates CC3 and CC4, base station sends RRC signaling notice UE change CC3 to receive TA control elements
With the cell of time reference；
Or base station does not deactivate CC3 and CC4 after CC2 deactivations, but directly transmit RRC signaling notice UE changes
CC3 is reception TA control elements and/or time reference cell；Step 307 is directly reached if performing the step；
Step 306：Base station sends secondary cell activation MAC control element activation CC3 and CC4, and now base station does not indicate that group 2 is entered
Row initial uplink synchronizing process (or instruction group 2 is synchronous without initial uplink), it is believed that group 2 is in uplink synchronous shape
State；
Step 307：UE is received and CC3 and CC4 is activated after control element, and on CC3 the TA control elements of reception group 2 and/
Or using CC3 as time reference cell.
Step 308：UE receives RRC connection reallocation messages and applies configuration parameter therein, small using CC3 as time reference
Area, and TA control elements are received on CC3.
Embodiment 2
Fig. 4 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 2, such as Fig. 4 institutes
Show, comprise the following steps：
Step 401：UE initiates RRC connections on CC1, and base station configures CC2 in RRC connection reallocation messages to UE, CC3 and
CC4 information and grouping information.CC1 is main serving cell, and it is auxiliary serving cell to be grouped 1, CC2~CC4, is grouped 2；Base
Stand while CC2 is configured in RRC connection reallocation messages to be responsible for receiving TA control elements and/or as time reference in group 2
Secondary cell；
Step 402：CC3 is activated in base station when UE is in RRC connection status, after CC3 completes uplink synchronous, CC3 conducts
The cell of TA control elements and/or time reference is received in group 2；Now CC2 can also be used as time reference cell；
Step 403：Base station reactivation CC2 and CC4 when UE is in RRC connection status, then organize cell the currently active in 2
For CC2~CC4.Configured according to the RRC of base station, CC2 is now needed as receiving the small of TA control elements and/or time reference
Area.CC3 will not be re-used as receiving the cell of TA control elements and/or time reference；
Step 404：After a period of time, if CC2 is deactivated, it is CC3 and CC4 now to organize the secondary cell activated in 2, is now selected
The secondary cell of cell designation minimum in activation cell is selected as the cell for receiving TA control elements and/or time reference, selection
CC3；Now CC2 can also be used as time reference cell；
Step 405：After a period of time, if base station sends secondary cell, activation control element activates CC2 again, and CC2 is again
It is changed into receiving the cell of TA control elements and/or time synchronized, CC3 is not re-used as receiving TA control elements and/or time synchronized
Reference cell.
Embodiment 3
Fig. 5 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 3, such as Fig. 5 institutes
Show, comprise the following steps：
Step 501：UE initiates RRC connections on CC1, base station in RRC connection reallocation messages to UE configure CC2, CC3 and
CC4 information and grouping information.CC1 is main serving cell, and it is auxiliary serving cell to be grouped 1, CC2~CC4, is grouped 2；Base
Stand and the secondary cell of UE default cells sign minimum can be as the time reference cell in group 2；Base station and UE default activations are small
The minimum secondary cell of cell designation is as the cell for receiving TA control elements and/or time reference in area；
Step 502：CC3 is activated in base station when UE is in RRC connection status, after CC3 completes uplink synchronous, CC3 conducts
Receive the cell of TA control elements and time reference；Or CC3 only receives TA control elements, CC2 is as time reference cell；
Step 503：Base station reactivation CC2 and CC4 when UE is in RRC connection status, then organize cell the currently active in 2
For CC2~CC4.Now the minimum secondary cell of cell designation is CC2 in group two, when being received TA control elements by CC2 and/or be used as
Between reference cell, no longer receive TA control elements on CC3, CC3 is also not as time reference cell；
Step 504：After a period of time, if CC2 is deactivated, it is CC3 and CC4 now to organize the secondary cell activated in 2, is now selected
The secondary cell of cell designation minimum in activation cell is selected as the cell for receiving TA control elements and/or time reference, selection
CC3.Now CC2 can also be used as time reference cell；
Embodiment 4
Fig. 6 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 4, such as Fig. 6 institutes
Show, comprise the following steps：
Step 601：UE initiates RRC connections on CC1, base station in RRC connection reallocation messages to UE configure CC2, CC3 and
CC4 information and grouping information.CC1 is main serving cell, and it is auxiliary serving cell to be grouped 1, CC2~CC4, is grouped 2；Base
Stand and random access resource is configured with CC2, for initiating RACH processes during uplink synchronous in organizing 2；Base station and UE think by with
The cell of random access resource has been put as reception TA control elements and/or time reference cell；
Step 602：Adjustment is timed from group 1 using different TA, then the secondary cell in group 2 swashs for the first time due to organizing 2
At least one cell is needed when living and carries out initial uplink synchronizing process.CC2 is configured with random access resource, then base station needs
Activation CC2 causes UE to carry out uplink synchronous using the random access resource on CC2, and base station sends secondary cell activation MAC control members
Element activation CC2, CC3, CC4；
Step 603：UE have activated CC2 after secondary cell control element is applied, and initial uplink synchronization is completed on CC2
Process.Base station and UE will be configured with the CC2 of RACH resource as the cell for receiving TA control elements and/or time reference；
Step 604：When CC2 packet data inactivity timer time-out, CC2 is deactivated, and now CC3 and CC4 are active.
The secondary cell that cell designation is minimum in activation cell is selected to select CC3 as the cell for receiving TA control elements and time reference；
Or CC3 is only still used as time reference cell as the cell for receiving TA control elements, CC2；
Step 605：After a period of time, base station sends activation secondary cell control element and reactivates CC2, and now CC2 is changed into
Receive TA control elements and/or time reference cell, CC3 no longer receive TA control elements, if joined before CC3 as the time
Examine cell, then follow-up CC3 is not as time reference cell.
Embodiment 5
Fig. 7 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 5, such as Fig. 7 institutes
Show, comprise the following steps：
Step 701：UE initiates RRC connections on CC1, base station in RRC connection reallocation messages to UE configure CC2, CC3 and
CC4 information and grouping information.CC1 is main serving cell, and it is auxiliary serving cell to be grouped 1, CC2~CC4, is grouped 2；Base
Stand and random access resource is configured with CC2, for initiating RACH processes during uplink synchronous in organizing 2；Base station and UE think by with
The cell of random access resource has been put as reception TA control elements or/and time reference cell.
Step 702：With the step 602 of embodiment 4.
Step 703：With the step 603 of embodiment 4.
Step 704：When CC2 packet data inactivity timer time-out, CC2 is deactivated；Now base station sends secondary cell and deactivated
Control element deactivates CC3 and CC4.
Or base station and UE are defaulted as now CC3 and CC4 has been deactivated.
Step 705：Base station sends RRC connection reallocation messages, CC3 random access resource is carried in message, for organizing in 2
Uplink synchronous initiates RACH processes.
Step 706：Base station sends secondary cell activation control element activation CC3 and CC4.
Step 707：Base station indicates the uplink synchronous of UE initiation groups 2 on CC3.
Step 708：After the completion of CC3 uplink synchronous, group 2 enters synchronous regime, and CC3, which can be used as, receives TA and time ginseng
Examine cell；Or CC3 only can still be used as time reference cell as the cell for receiving TA, CC2.
Embodiment 6
Fig. 8 is the detail flowchart of the cell selecting method in the multi-carrier communications systems according to embodiment 6, such as Fig. 8 institutes
Show, comprise the following steps：
Step 801：UE initiates RRC connections on CC1, base station in RRC connection reallocation messages to UE configure CC2, CC3 and
CC4 information and grouping information.CC1 is main serving cell, and it is auxiliary serving cell to be grouped 1, CC2~CC4, is grouped 2；Base
Stand and random access resource is configured with CC2, for initiating RACH processes during uplink synchronous in organizing 2；Base station and UE think by with
The cell of random access resource has been put as reception TA control elements and/or time reference cell；
Step 802：Adjustment is timed from group 1 using different TA, then the secondary cell in group 2 swashs for the first time due to organizing 2
At least one cell is needed when living and carries out initial uplink synchronizing process.CC2 is configured with random access resource, then base station needs
Activation CC2 causes UE to carry out uplink synchronous using the random access resource on CC2, and base station sends secondary cell activation MAC control members
Element activation CC2, CC3, CC4；
Step 803：UE have activated CC2 after secondary cell control element is applied, and initial uplink synchronization is completed on CC2
Process.CC3 and CC4 also enters uplink sync status, and UE can carry out uplink on CC2, CC3 and CC4, and CC1 can be with
Time reference cell as these cells；
Step 804：Base station adjusts TA control elements on CC1 to the UE times sent for organizing 2, by control element
Cell ID indicate the TA control elements be sent to group 2.
Step 805：UE receives TA control elements on CC1, reads the identification discovery control carried in control element
Element is used for the time adjustment of group 2, then organizes 2 application time adjustment TA control elements.CC1 is small as reception TA control elements
Area.
As can be seen from the above description, the present invention solves in correlation technique after multiple TA packets are introduced, only
How how access time reference cell and selects to receive Timing Advance TA controls for secondary cell in packet comprising secondary cell
The problem of cell of element, the program have been adapted to more TA and the demand being grouped more in multi-carrier communications systems, can be each
Packet provides more accurate TA controls, so that each UE upstream data each falls within the reception of base station when reaching base station
In time window, the losing probability of upstream data is reduced, thus improves the service performance of whole system.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, so as to being stored in
Performed in storage device by computing device, they are either fabricated to each integrated circuit modules respectively or by them
Multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hard
Part and software combine.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (11)
- A kind of 1. cell selecting method in multi-carrier communications systems, it is characterised in that including：Packet for only including secondary cell, user equipment (UE) and/or base station select to be used to receive respectively for each packet The cell of Timing Advance TA control elements and/or the cell as time reference；Wherein, include below extremely for receiving the selection mode of the cell of TA control elements and/or cell as time reference It is one of few：Mode one, base station are used to receive the cell of TA control elements and/or as time reference to the user device configuration Cell；Mode two, select the secondary cell for performing RACH RACH processes in the packet to be used as and be used to receive TA controls The cell of element processed and/or the cell as time reference；Mode three, select cell ID in all secondary cells of the packet Secondary cell of the minimum or maximum secondary cell as time reference, or, select small in the secondary cell that has been activated in the packet Mark minimum or maximum secondary cell in area's is used as the secondary cell that is used to receive TA control elements and/or auxiliary small as time reference Area；Mode five, main plot is selected as the TA control elements for being used to receive in secondary cell packet and/or as the small of time reference Area.
- 2. according to the method for claim 1, it is characterised in that for receive TA control elements cell and/or as when Between the selection mode of cell that refers to also include：Mode four, the secondary cell that any of described packet has activated is selected as the secondary cell for receiving TA control elements And/or the secondary cell as time reference.
- 3. method according to claim 1 or 2, it is characterised in that the cell as time reference of selection is secondary cell When, the selection the secondary cell as time reference activated with it is unactivated in the case of, as using in the packet Make the secondary cell of time reference；The cell for being used to receive TA control elements of selection is used as only in the case where having activated to be used to connect Receive the cell of TA control elements.
- 4. method according to claim 1 or 2, it is characterised in that be used to receive TA control members for the packet selection After element and/or the cell as time reference, in addition to：Being used to receive TA control elements and/or secondary cell un-activation as time reference or be deactivated in the selection In the case of, a secondary cell is reselected in the secondary cell activated in the packet and is used as receiving TA control elements And/or the secondary cell as time reference, or, a secondary cell is reselected in the secondary cell activated in the packet As the secondary cell for receiving TA control elements, retain and join using the secondary cell conduct selected originally is described as the time The secondary cell examined.
- 5. according to the method for claim 4, it is characterised in that selecting to be used to receive TA control members using the mode one After element and/or the secondary cell as time reference, in addition to：Being used to receive TA control elements and secondary cell un-activation as time reference or be deactivated in the selection In the case of, matched somebody with somebody again to the user equipment by the mode one in the secondary cell that the base station has been activated in the packet The secondary cell for receiving TA control elements and/or the secondary cell as time reference are put, or, the user equipment is described Reselected in the secondary cell activated in packet by the mode two, mode three or mode four for receiving TA control elements Secondary cell and/or secondary cell as time reference.
- 6. according to the method for claim 4, it is characterised in that selecting to be used to receive TA control members using the mode two After element and/or the secondary cell as time reference, in addition to：Being used to receive TA control elements and secondary cell un-activation as time reference or be deactivated in the selection In the case of, pass through the mode two, mode three or mode four in the secondary cell that the user equipment has activated in the packet Reselect the secondary cell for receiving TA control elements and/or the secondary cell as time reference.
- 7. according to the method for claim 4, it is characterised in that selecting to be used to receive TA control members using the mode three After element and/or the secondary cell as time reference, in addition to：Being used to receive TA control elements and secondary cell un-activation as time reference or be deactivated in the selection In the case of, reselected in the secondary cell that the user equipment has activated in the packet by the mode three or mode four For receiving the secondary cell of TA control elements and/or secondary cell as time reference.
- 8. according to the method for claim 4, it is characterised in that in the secondary cell selected first from unactivated state change In the case of for the state that has activated, the user equipment recovers using the secondary cell selected first as being used in the packet In receiving TA control elements and/or cell as time reference.
- 9. according to the method any one of claim 5-7, it is characterised in that in the secondary cell selected first from un-activation State change be the state that has activated in the case of, the user equipment recovers using the secondary cell selected first as institute State and be used to receive TA control elements and/or the cell as time reference in packet.
- A kind of 10. cell selecting apparatus in carrier communication system, it is characterised in that including：Selecting module, for for each only the packet comprising secondary cell selects to be used to receive Timing Advance TA control elements respectively Cell and/or cell as time reference；Wherein, the selection mode of the selecting module includes at least one of：Mode one, base station is used for user device configuration Receive the cell of TA control elements and/or the cell as time reference；Mode two, select to perform Stochastic accessing in the packet Cell of the secondary cell of channel RACH processes as the cell for being used to receive TA control elements and/or as time reference；Mode Three, the secondary cell that cell ID is minimum in all secondary cells of the packet or the secondary cell of maximum is as time reference is selected, Or the minimum or maximum secondary cell of cell ID is used as receiving TA controls in the secondary cell for selecting to have activated in the packet The secondary cell of element processed and/or the secondary cell as time reference；Mode five, select main plot to be used as and be used to receive secondary cell point TA control elements in group and/or the cell as time reference.
- 11. device according to claim 10, it is characterised in that described device is located in base station and/or user equipment (UE).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110226036.8A CN102932880B (en) | 2011-08-08 | 2011-08-08 | Cell selecting method and device in multi-carrier communications systems |
| PCT/CN2012/079812 WO2013020504A1 (en) | 2011-08-08 | 2012-08-08 | Cell selection method and device in multicarrier communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110226036.8A CN102932880B (en) | 2011-08-08 | 2011-08-08 | Cell selecting method and device in multi-carrier communications systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102932880A CN102932880A (en) | 2013-02-13 |
| CN102932880B true CN102932880B (en) | 2018-03-27 |
Family
ID=47647545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110226036.8A Active CN102932880B (en) | 2011-08-08 | 2011-08-08 | Cell selecting method and device in multi-carrier communications systems |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102932880B (en) |
| WO (1) | WO2013020504A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521669B (en) * | 2013-04-03 | 2020-11-10 | Lg 电子株式会社 | Method and apparatus for transmitting uplink data using multiple serving cells |
| CN105532051B (en) * | 2013-04-15 | 2019-11-05 | 瑞典爱立信有限公司 | Secondary cell synchronization for carrier aggregation |
| CN104769986B (en) * | 2013-11-07 | 2019-03-12 | 华为技术有限公司 | A method, apparatus and system for activating/deactivating secondary cell |
| US9762361B2 (en) * | 2014-03-05 | 2017-09-12 | Qualcomm Incorporated | Timer configuration for secondary cells in LTE/LTE-A networks using unlicensed spectrum |
| CN110035491B (en) * | 2018-01-11 | 2020-06-19 | 维沃移动通信有限公司 | A synchronization instruction method and device |
| CN110958070B (en) * | 2018-09-27 | 2021-08-20 | 华为技术有限公司 | A method and device for determining reference time |
| CN112911696B (en) * | 2019-11-19 | 2022-06-10 | 维沃移动通信有限公司 | Method for obtaining reference time, method and apparatus for indicating reference time |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101646234A (en) * | 2009-09-01 | 2010-02-10 | 中兴通讯股份有限公司 | Obtaining method of timing lead |
| WO2010095851A3 (en) * | 2009-02-17 | 2010-11-25 | 엘지전자 주식회사 | Method and apparatus for communication between relay node and user equipment in wireless communication system |
| CN102123516A (en) * | 2011-03-31 | 2011-07-13 | 电信科学技术研究院 | Random access method and equipment based on multiple uplink timing advances |
-
2011
- 2011-08-08 CN CN201110226036.8A patent/CN102932880B/en active Active
-
2012
- 2012-08-08 WO PCT/CN2012/079812 patent/WO2013020504A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010095851A3 (en) * | 2009-02-17 | 2010-11-25 | 엘지전자 주식회사 | Method and apparatus for communication between relay node and user equipment in wireless communication system |
| CN101646234A (en) * | 2009-09-01 | 2010-02-10 | 中兴通讯股份有限公司 | Obtaining method of timing lead |
| CN102123516A (en) * | 2011-03-31 | 2011-07-13 | 电信科学技术研究院 | Random access method and equipment based on multiple uplink timing advances |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102932880A (en) | 2013-02-13 |
| WO2013020504A1 (en) | 2013-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103580781B (en) | Ability information processing method, device and base station | |
| CN102932880B (en) | Cell selecting method and device in multi-carrier communications systems | |
| EP3639451B1 (en) | Communication system | |
| CN102045763A (en) | Method and device for processing user equipment capacity | |
| CN102932900B (en) | The processing method and processing device of time unifying timer in multi-carrier communications systems | |
| CN103874216B (en) | A method, device and base station for signal transmission | |
| CN102013917B (en) | Method, system and equipment for transmitting system information | |
| CN102014515B (en) | A random access method, device and system | |
| EP4507425A1 (en) | Random access resource configuration method, apparatus, terminal and network side device | |
| CN102932901A (en) | Method and device for synchronous cell maintenance of multi-carrier communication system | |
| CN102227939A (en) | An uplink synchronization method, base station and user equipment | |
| CN109561471A (en) | Indicate and configure method, base station, user equipment and the readable medium of BWP parameter | |
| US20190082480A1 (en) | Device and Method of Handling a Radio Resource Control Connection | |
| CN103228044B (en) | Small differentiation group management method and system in multi-carrier communications systems | |
| KR102811367B1 (en) | Method and apparatus for performing conditional handover | |
| CN103327627B (en) | The reallocating method and device of auxiliary serving cell in multi-carrier communications systems | |
| KR20250072587A (en) | Method and apparatus for performing conditional handover | |
| KR102613535B1 (en) | Apparatus and method for performing random access based on network slicing | |
| CN103037516B (en) | A kind of method being grouped to serving cell, user equipment and base station | |
| CN110234136B (en) | LTE uplink carrier synchronization method and device | |
| CN103999527B (en) | Multicarrier configuration, user equipment access method and related device in FDD system | |
| CN103327646B (en) | A kind of amending method and device of time reference cell | |
| KR102551191B1 (en) | Apparatus and method for transmitting ran slicing information | |
| CN103391533A (en) | Method and device for terminal to report MTA (multiple time advance) capacity in carrier aggregation system | |
| CN103491547B (en) | A kind of frequency spectrum switching method based on cognitive radio system and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |