CN102932880A - Method and device for selecting cells in multi-carrier communication system - Google Patents
Method and device for selecting cells in multi-carrier communication system Download PDFInfo
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Abstract
The invention provides a method and a device for selecting cells in a multi-carrier communication system. According to the method, user equipment (UE) and/or a base station respectively select(s) a cell which is used for receiving a timing advance (TA) control element and/or a cell which serves as a time reference cell for each packet which only comprises a secondary cell. By the invention, the problems about selection of the time reference cell from the secondary cell in each packet which only comprises the secondary cell and/or selection of the cell which is used for receiving the TA control element after a plurality of TA packets are introduced to the prior art are solved. The scheme meets requirements of the multi-carrier communication system on multi-TA and multi-packet, and accurate TA control can be provided for each packet, so uplink data of each piece of UE can fall into a receiving time window of the base station when arriving at the base station, the loss probability of the uplink data is reduced, and the service performance of the whole system is improved.
Description
Technical field
The present invention relates to the communications field, cell selecting method and device in a kind of multi-carrier communications systems.
Background technology
Introduced the primary demand that a lot of new technologies satisfy IMT-Advanced in the advanced long-term evolution system (Long Term Evolution Advance is referred to as LTE-Advanced), wherein a most important technology is exactly carrier aggregation.
Because radio spectrum resources is very in short supply at present, the index of peak rate is higher (supports 100Mbps under the high mobility and IMT-Advanced requires, support 1Gbps under the Hypomobility), bandwidth with the maximum 20MHz of present LTE standard can't satisfy the IMT-Advanced requirement, so need to extend to more high bandwidth, such as 40MHz, 60MHz, in addition higher.One of method that improves bandwidth and peak rate is that frequency domain is expanded, and for example several LTE frequency bands based on 20MHz is carried out bandwidth by the mode of " carrier aggregation " and enlarges the essence of carrier aggregation technology that Here it is.Therefore, the LTE-Advanced system also belongs to multicarrier system.
In the LTE-Advanced system, the carrier wave that participates in polymerization is called as component carrier (Component Carrier), and subscriber equipment (UserEquipment is referred to as UE) can received and dispatched transmission on a plurality of component carriers and between the eNB simultaneously.Component carrier can use the defined frequency range of LTE, also can use the frequency range that increases newly specially as LTE-Advanced.Based on the situation of present frequency spectrum resource anxiety, can not always have component carrier continuous on the frequency domain to distribute to operator and use, so component carrier can be continuous on frequency band, also can be discontinuous.Introduced the concept of main plot and auxiliary residential quarter in the carrier aggregation, the main plot refers to that UE initiates the residential quarter that RRC connects foundation or RRC connection reconstruction or be designated as the main plot in handoff procedure; Auxiliary residential quarter refers to be different from the frequency of main plot, and disposes after UE enters the RRC connection status, is used for providing extra Radio Resource.In carrier aggregation system, Serving cell comprises main Serving cell and auxiliary serving cell.
After introducing carrier aggregation technology, UE can receive and dispatch transmission at a plurality of Serving cells simultaneously at RRC connected state (RRC_CONNECTED), but the UE for Idle state (RRC_IDLE), as LTE, only can reside on the residential quarter, UE is after successfully accessing on this residential quarter, be that UE is after the RRC connection is set up in this residential quarter, according to service needed, the base station can be that UE distributes newly-increased residential quarter by the special RRC signaling, after distributing these newly-increased residential quarters, base station and UE be the immediately enterprising row data transmitting-receiving in this newly-increased residential quarter not, and namely the base station does not send business datum to UE on this newly-increased residential quarter, and UE preserves the configuration information on this residential quarter, on this residential quarter, do not send business datum to the base station yet, wait for the further action of base station.Subsequent base stations can activate this residential quarter according to service needed, and after this residential quarter was activated, base station and UE could the enterprising row data transmitting-receivings in this residential quarter.
In the LTE system, in order to realize and to keep uplink synchronous between subscriber equipment and the base station, the base station is according to propagation delay time transmitting time lead (the Timing Advance between base station and each subscriber equipment, referred to as TA) to each subscriber equipment, the opportunity that the Timing Advance that subscriber equipment sends according to the base station shifts to an earlier date or postpones separately uplink, thereby remedy user terminal to the propagation delay time of base station, so that the upward signal of different user devices all arrives the base station within the receive window of base station.If for the propagation delay time of each minizone in the residential quarter of certain UE configuration differs larger, can't use identical TA, in carrier aggregation system, just need to introduce so the concept of many TA.According to the situation of using TA, can will use the UE of identical TA to be placed in same group, so just introduced the concept of grouping.
In carrier aggregation system before, all carrier waves use identical TA, the main plot is as the residential quarter that receives the TA control element, reference carrier when simultaneously the component carrier at its place also sends as the upward signal of UE, hereinafter to be referred as the time reference carrier wave, corresponding residential quarter is called the time reference residential quarter.Yet, after the concept of introducing grouping and many TA, owing to have different groupings and different TA, if still only use the main plot as the residential quarter and/or the time reference residential quarter that receive the TA control element, then can not satisfy the requirement of grouping and many TA, so that the residential quarter that propagation delay time differs larger can't adopt suitable TA carry out the uplink adjustment on opportunity, thereby may cause base station side can't receive the situation of the upstream data of part residential quarter, cause losing of upstream data.
Summary of the invention
Main purpose of the present invention is to provide cell selecting method and the device in a kind of multi-carrier communications systems, to address the above problem at least.
One aspect of the present invention provides the cell selecting method in a kind of multi-carrier communications systems, comprise: for the grouping that only comprises auxiliary residential quarter, UE and/or base station are selected respectively for the residential quarter that receives the TA control element and/or as the residential quarter of time reference for each described grouping.
Another aspect of the present invention provides the cell selecting apparatus in a kind of carrier communication system, comprise: select module, be used for for the grouping that only comprises auxiliary residential quarter, for each described grouping is selected respectively for the residential quarter that receives the TA control element and/or as the residential quarter of time reference.
By the present invention, for the grouping that only comprises auxiliary residential quarter, UE and/or base station are selected respectively for the residential quarter that receives the TA control element and/or as the residential quarter of time reference for each this grouping, solved in the correlation technique after having introduced a plurality of TA groupings, only comprise in the grouping of auxiliary residential quarter auxiliary residential quarter how access time reference cell and/or How to choose time of reception lead TA control element the problem of residential quarter, this scheme has adapted in the multi-carrier communications systems many TA and the demand of dividing into groups more, can provide more accurate TA control for each grouping, thereby so that the upstream data of each UE all falls in the time of reception window of base station when arriving the base station, reduce the losing probability of upstream data, thereby improved the service performance of whole system.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the cell selecting method in the multi-carrier communications systems of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the covering of the carrier aggregation of the embodiment of the invention;
Fig. 3 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 1;
Fig. 4 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 2;
Fig. 5 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 3;
Fig. 6 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 4;
Fig. 7 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 5; And
Fig. 8 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 6.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove that in the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
In carrier aggregation system before, all carrier wave uses identical TA, and the main plot is as the residential quarter that receives the TA control element, the reference carrier when also sending as the upward signal of UE simultaneously.Only using the main plot after the concept of introducing grouping and many TA is inadequate as receiving TA control element and/or time reference carrier wave, need to choose a residential quarter as receiving TA control element and/or time reference carrier wave in each grouping.In the grouping that comprises the main plot, can continue to use the main plot as receiving TA control element and/or time reference carrier wave; In the group that only comprises a plurality of auxiliary residential quarters, can select (in the residential quarter that receives the TA control element and time reference residential quarter all in selected and both different situations, may be two a) auxiliary residential quarter as reception TA control element and/or the time reference carrier wave of this group.
Fig. 1 is the schematic diagram according to the cell selecting method in the multi-carrier communications systems of the embodiment of the invention, as shown in Figure 1, in the method, for the grouping that only comprises auxiliary residential quarter, UE and/or base station are selected respectively for the residential quarter that receives the TA control element and/or as the residential quarter of time reference for each such grouping.
By the method, many TA carrier aggregation system can be selected respectively for the residential quarter that receives the TA control element and/or as the residential quarter of time reference for each grouping that only comprises a plurality of auxiliary residential quarters by UE and/or base station.In actual applications, for the grouping that only comprises auxiliary residential quarter, can be in the auxiliary residential quarter that grouping comprises, for this minute group selection be used for to receive the auxiliary residential quarter of TA control element and/or as the auxiliary residential quarter of time reference, the residential quarter that perhaps, also the main plot can be used for receiving the residential quarter of TA control element and/or be used as time reference as this auxiliary cell group.The method has solved after having introduced a plurality of TA groupings, only comprise in the grouping of auxiliary residential quarter auxiliary residential quarter how access time reference cell and/or How to choose time of reception lead TA control element the problem of residential quarter, this scheme has adapted in the multi-carrier communications systems many TA and the demand of dividing into groups more, can provide more accurate TA control for each grouping, thereby so that the upstream data of each UE all falls in the time of reception window of base station when arriving the base station, reduce the losing probability of upstream data, thereby improved the service performance of whole system.
Need to prove, in above description and Fig. 1, for the grouping that comprises the main plot, selected main carrier as the residential quarter that is used for receiving the TA control element and/or is used as time reference, but, the cell selecting method for the grouping that only comprises auxiliary residential quarter that proposes in the embodiment of the invention, the residential quarter that is used for receiving the TA control element and/or being used as time reference for the grouping How to choose that comprises the main plot does not have special restriction, for the grouping that comprises the main plot, to select the main plot or adopt additive method to select other residential quarter according to prior art, all do not affect the enforcement of this method, do not affect it yet and solve after having introduced a plurality of TA groupings, only comprise in the grouping of auxiliary residential quarter auxiliary residential quarter how access time reference cell and/or How to choose time of reception lead TA control element the problem of residential quarter.
In actual applications, can adopt several different methods to select for the residential quarter that receives the TA control element and/or as the residential quarter of time reference, for example:
Mode one, the base station be used for to receive the residential quarter of TA control element and/or as the residential quarter of time reference to user device configuration.Preferably, this configuration operation can when being the grouping information of the auxiliary residential quarter of user device configuration and each residential quarter, be carried out in the base station.In this mode, be UE when disposing the grouping information of auxiliary residential quarter and residential quarter in the base station, can receive the TA control element and/or as the cell ID of time reference residential quarter by RRC related news (for the easy RRC that can adopt connects reallocation message) configuration.UE is store configuration information after receiving, the residential quarter that is configured to time reference can be as the time reference residential quarter under the activation/deactivation state of auxiliary residential quarter, the auxiliary residential quarter that is configured to receive the TA control element as the residential quarter that receives the TA control element, can think also that perhaps the residential quarter that receives the TA control element is just as the time reference residential quarter under activated state.
Mode two is carried out the auxiliary residential quarter of Random Access Channel RACH process as the residential quarter that is used for receiving the residential quarter of TA control element and/or is used as time reference in selecting to divide into groups.In this mode, the base station is to receiving the TA control element and/or do not carry out explicit signal deployment as the residential quarter of time reference in the grouping that only comprises auxiliary residential quarter, but choose carry out the RACH process in this grouping the residential quarter as reception TA control element and/or time reference residential quarter.In the group that only comprises auxiliary residential quarter, need to there be a residential quarter after activation, to carry out the uplink synchronous process, so that all residential quarters in this grouping all enter the uplink synchronous state, this residential quarter also can be used as and receives TA control element and/or time reference residential quarter.
Mode three, select all auxiliary residential quarter small areas of grouping to identify minimum or maximum auxiliary residential quarter as the auxiliary residential quarter as time reference, perhaps, select the minimum or maximum auxiliary residential quarter of the auxiliary residential quarter small area sign that activated in the grouping as the auxiliary residential quarter that is used for receiving the TA control element and/or as the auxiliary residential quarter of time reference.In this mode, the base station does not use signaling to carry out explicit indication, and the grouping small area that base station and UE acquiescence only comprise auxiliary residential quarter identifies minimum or maximum auxiliary residential quarter as the auxiliary residential quarter of time reference; Perhaps base station and UE acquiescence only comprises and has activated small area sign minimum or maximum auxiliary residential quarter in auxiliary residential quarter in the grouping of auxiliary residential quarter as the auxiliary residential quarter that receives TA control element and/or time reference.
Mode four, any auxiliary residential quarter of having activated is as the auxiliary residential quarter that is used for receiving the auxiliary residential quarter of TA control element and/or is used as time reference in the selection grouping, in this mode, if the auxiliary residential quarter of having activated is a plurality of, after can being selected by UE with the selection result informing base station, thereby guarantee the consistency of the residential quarter that both select, be convenient to follow-up synchronizing process.
Preferably, selection be auxiliary residential quarter as the residential quarter of time reference the time, selected auxiliary residential quarter activated with unactivated situation under, all can be used as the auxiliary residential quarter that is used as time reference in the grouping; The residential quarter that being used for of selecting receives the TA control element only in situation about having activated as the residential quarter that is used for receiving the TA control element.
If the current state of activation that is not in the residential quarter of having selected, in order to receive the TA control element, may need to reselect an auxiliary residential quarter of having activated, therefore, after being used for receiving the TA control element for minute group selection and/or being used as the auxiliary residential quarter of time reference, being used for of selecting receive the TA control element and/or as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, reselect an auxiliary residential quarter in the auxiliary residential quarter of in grouping, having activated as the auxiliary residential quarter that is used for receiving the TA control element and/or is used as time reference, perhaps, reselect an auxiliary residential quarter in the auxiliary residential quarter of in grouping, having activated as the auxiliary residential quarter that is used for receiving the TA control element, keep and adopt the original auxiliary residential quarter of selecting as the auxiliary residential quarter as time reference.
In actual applications, above mode one to four can be used in combination in the process of first selection and gravity treatment mutually, for example:
(1) after employing mode one is selected to be used for receiving the TA control element and/or is used as the auxiliary residential quarter of time reference, being used for of selecting receive the TA control element and as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, pass-through mode one be used for to receive the auxiliary residential quarter of TA control element and/or as the auxiliary residential quarter of time reference to user device configuration again in the auxiliary residential quarter that the base station has been activated in grouping, perhaps, pass-through mode two in the auxiliary residential quarter in grouping, activated of subscriber equipment, the new auxiliary residential quarter of selecting to be used for the auxiliary residential quarter of reception TA control element and/or being used as time reference of mode three or mode quadruple.
(2) after employing mode two is selected to be used for receiving the TA control element and/or is used as the auxiliary residential quarter of time reference, being used for of selecting receive the TA control element and as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, in the auxiliary residential quarter that subscriber equipment has activated in grouping the new auxiliary residential quarter of selecting to be used for to receive the TA control element of pass-through mode two, mode three or mode quadruple and/or as the auxiliary residential quarter of time reference.
(3) after employing mode three is selected to be used for receiving the TA control element and/or is used as the auxiliary residential quarter of time reference, being used for of selecting receive the TA control element and as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, in the auxiliary residential quarter that subscriber equipment has activated in grouping the new auxiliary residential quarter of selecting to be used for to receive the TA control element of pass-through mode three or mode quadruple and/or as the auxiliary residential quarter of time reference.
In addition, in the situation of unactivated state variation for the state that activated, subscriber equipment also can recover the auxiliary residential quarter that will select first as being used for receiving the TA control element in the grouping and/or as the residential quarter of time reference in the auxiliary residential quarter of selecting first.
In above method, the carrier aggregation system of many TA is chosen in the grouping that only comprises auxiliary residential quarter and is received the TA control element and/or as the residential quarter of time reference.The method is described agreement to the integral body of multicarrier system and is changed to some extent, needs to select one to receive the TA control element and/or as the residential quarter of time reference in namely clear and definite many TA multicarrier system in the grouping that only comprises auxiliary residential quarter; For the ease of the layoutprocedure of mode one, can change the RRC agreement of UE simultaneously, need namely to add that configuration parameter indicates reception TA control element in this group and/or as the residential quarter of time reference; In addition, can also receive the TA control element and/or as the selection principle of the residential quarter of time reference by the MAC agreement being changed clearly choose.
Mode five: select the main plot as the grouping that only comprises auxiliary residential quarter be used for receive the TA control element and/or as the residential quarter of time reference.UE can receive the TA control element that is used for the adjustment of auxiliary cell group time in the main plot, this control element is applied in auxiliary cell group.
Need to prove, in the situation that comprises a plurality of groupings that only comprise auxiliary residential quarter, for different groupings, can unify to adopt a kind of identical mode to be respectively the residential quarter that each minute group selection is used for receiving the residential quarter of TA control element and/or is used as time reference; Separately the mode also can each grouping independently chosen is selected for the residential quarter that receives the TA control element and/or as the residential quarter of time reference, and selected mode may be different, and is also may part identical, certain, also may be all identical.
The embodiment of the invention also provides the cell selecting apparatus in a kind of carrier communication system, comprise: select module, be used to each grouping that only comprises auxiliary residential quarter to select respectively for the residential quarter of time of reception lead TA control element and/or as the residential quarter of time reference.This device can be arranged in base station and/or subscriber equipment.
This device can be carried out the described method of above embodiment, adapted in the multi-carrier communications systems many TA and the demand of dividing into groups more, can provide more accurate TA control for each grouping, thereby so that the upstream data of each UE all falls in the time of reception window of base station when arriving the base station, reduce the losing probability of upstream data, thereby improved the service performance of whole system.
Fig. 2 is the schematic diagram according to the covering of the carrier aggregation of the embodiment of the invention.As shown in Figure 2, Serving cell 1 (descending frequency f1, up frequency f1 ') is referred to as CC1 (DL f1, UL f1 '); Serving cell 2 (descending frequency f2, up frequency f2 ') is referred to as CC2 (DL f2, UL f2 '); Serving cell 3 (descending frequency f3, up frequency f3 '); Serving cell 4 (descending frequency f4, up frequency f4 ') can carry out carrier aggregation.User equipment (UE) resides in CC1 and upward and at CC1 initiates the RRC connection procedure, and CC1 thinks the main Serving cell of UE, and CC1 is in group 1.Serving cell CC2, CC3 and CC4 are auxiliary residential quarter, in group 2.CC1 is respectively 1～4 to the residential quarter sign of CC4.Below take scene shown in Figure 2 as example, by embodiment 1-5 with mode of frequency division duplexing (Frequency Division Duplex, referred to as FDD) describe residential quarter selection scheme in the multi-carrier communications systems that the embodiment of the invention provides in detail for example, embodiment 1-5 combines the technical scheme of above-mentioned a plurality of preferred embodiments.
Fig. 3 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 1, as shown in Figure 3, may further comprise the steps:
Step 301:UE initiates RRC at CC1 and connects, and the base station connects in the reallocation message to UE configuration CC2, the information of CC3 and CC4 and grouping information at RRC.CC1 is main Serving cell, composition group 1, and CC2～CC4 is auxiliary serving cell, composition group 2; The base station simultaneously connects that configuration CC2 in the reallocation message is responsible for receiving the TA control element in for group 2 and/or as the auxiliary residential quarter of time reference at RRC;
Step 302: CC3 is activated in the base station when UE is in the RRC connection status, and after CC3 finished uplink synchronous, CC3 was as the residential quarter of safeguarding TA and/or time reference in the group 2; This moment also can be by CC2 as the time reference residential quarter;
Step 303: CC2 and CC4 are activated in the base station when UE is in the RRC connection status, configuration information according to the base station, CC2 is as the residential quarter that receives TA control element and/or time reference in the group 2, and this moment, CC3 was not re-used as the residential quarter that receives TA control element and/or time reference in the group 2;
Step 304: when the deexcitation timer expiry of CC2, the CC2 deexcitation.This moment, the base station sent deexcitation MAC control element deexcitation CC3 and CC4 at once;
Step 305: the base station sends RRC signaling UE change CC3 for receiving the residential quarter of TA control element and/or time reference;
Perhaps voluntarily deexcitation CC3 and CC4 of UE, the base station sends RRC signaling UE change CC3 for receiving the residential quarter of TA control element and time reference;
Perhaps not deexcitation of base station CC3 and CC4 after the CC2 deexcitation are reception TA control element and/or time reference residential quarter but directly send RRC signaling UE change CC3; As carry out this step and then directly arrive step 307;
Step 306: the base station sends auxiliary residential quarter and activates MAC control element activation CC3 and CC4, and this moment, the base station did not indicate group 2 to carry out initial uplink synchronizing process (it is synchronous that perhaps indication group 2 is not carried out initial uplink), thinks that group 2 has been in the uplink synchronous state;
Step 307:UE receives and activates CC3 and CC4 behind the control element, and on CC3 reception group 2 the TA control element and/or with CC3 as the time reference residential quarter.
Step 308:UE receives RRC and connects reallocation message and use wherein configuration parameter, and CC3 as the time reference residential quarter, and is received the TA control element at CC3.
Embodiment 2
Fig. 4 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 2, as shown in Figure 4, may further comprise the steps:
Step 401:UE initiates RRC at CC1 and connects, and the base station connects in the reallocation message to UE configuration CC2, the information of CC3 and CC4 and grouping information at RRC.CC1 is main Serving cell, composition group 1, and CC2～CC4 is auxiliary serving cell, composition group 2; The base station simultaneously connects that configuration CC2 in the reallocation message is responsible for receiving the TA control element in for group 2 and/or as the auxiliary residential quarter of time reference at RRC;
Step 402: CC3 is activated in the base station when UE is in the RRC connection status, and after CC3 finished uplink synchronous, CC3 was as the residential quarter that receives TA control element and/or time reference in the group 2; This moment, CC2 also can be used as the time reference residential quarter;
Step 403: reactivation CC2 and CC4 when the base station is in the RRC connection status at UE, the residential quarter of then organizing current activation in 2 is CC2～CC4.According to the RRC configuration of base station, CC2 needs at this moment as the residential quarter that receives TA control element and/or time reference.CC3 will not be re-used as the residential quarter that receives TA control element and/or time reference;
Step 404: after a period of time, if the CC2 deexcitation, organize the auxiliary residential quarter of activating in 2 this moment is CC3 and CC4, selects this moment the activation cell small area to indicate minimum auxiliary residential quarter as the residential quarter that receives TA control element and/or time reference, selects CC3; This moment, CC2 also can be used as the time reference residential quarter;
Step 405: after a period of time, the active control element activates CC2 again if the base station sends auxiliary residential quarter, and then CC2 becomes the residential quarter that receives TA control element and/or time synchronized again, and CC3 is not re-used as the reference cell that receives TA control element and/or time synchronized.
Embodiment 3
Fig. 5 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 3, as shown in Figure 5, may further comprise the steps:
Step 501:UE initiates RRC at CC1 and connects, and the base station connects information and the grouping information that disposes CC2, CC3 and CC4 in the reallocation message to UE at RRC.CC1 is main Serving cell, composition group 1, and CC2～CC4 is auxiliary serving cell, composition group 2; Base station and UE default cell indicate minimum auxiliary residential quarter and can be used as the time reference residential quarter of organizing in 2; Base station and UE acquiescence activation cell small area indicate minimum auxiliary residential quarter as the residential quarter that receives TA control element and/or time reference;
Step 502: CC3 is activated in the base station when UE is in the RRC connection status, and after CC3 finished uplink synchronous, CC3 was as the residential quarter that receives TA control element and time reference; Perhaps CC3 only receives the TA control element, and CC2 is as the time reference residential quarter;
Step 503: reactivation CC2 and CC4 when the base station is in the RRC connection status at UE, the residential quarter of then organizing current activation in 2 is CC2～CC4.Organizing the minimum auxiliary residential quarter of two small areas sign this moment is CC2, is received the TA control element and/or as the time reference residential quarter, is no longer received the TA control element on the CC3 by CC2, and CC3 is not also as the time reference residential quarter;
Step 504: after a period of time, if the CC2 deexcitation, organize the auxiliary residential quarter of activating in 2 this moment is CC3 and CC4, selects this moment the activation cell small area to indicate minimum auxiliary residential quarter as the residential quarter that receives TA control element and/or time reference, selects CC3.This moment, CC2 also can be used as the time reference residential quarter;
Embodiment 4
Fig. 6 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 4, as shown in Figure 6, may further comprise the steps:
Step 601:UE initiates RRC at CC1 and connects, and the base station connects information and the grouping information that disposes CC2, CC3 and CC4 in the reallocation message to UE at RRC.CC1 is main Serving cell, composition group 1, and CC2～CC4 is auxiliary serving cell, composition group 2; The base station has disposed random access resource in CC2, initiate the RACH process when being used for group 2 uplink synchronous; Base station and UE think that the residential quarter that has been configured random access resource is as receiving TA control element and/or time reference residential quarter;
Step 602: because group 2 is carried out timing adjustment with the different TA of group 1 use, organizing so when auxiliary residential quarter in 2 is activated for the first time to have at least one residential quarter to carry out the initial uplink synchronizing process.CC2 has disposed random access resource, and CC2 need to be activated so that UE adopts the random access resource on the CC2 to carry out uplink synchronous in the base station so, and the base station sends auxiliary residential quarter and activates MAC control element activation CC2, CC3, CC4;
Step 603:UE has activated CC2 after having used auxiliary residential quarter control element, and finishes the initial uplink synchronizing process at CC2.Base station and UE will dispose the CC2 of RACH resource as the residential quarter that receives TA control element and/or time reference;
Step 604: when the deexcitation timer expiry of CC2, the CC2 deexcitation, this moment, CC3 and CC4 were in state of activation.Select the activation cell small area to indicate minimum auxiliary residential quarter as the residential quarter that receives TA control element and time reference, select CC3; Perhaps only as the residential quarter that receives the TA control element, CC2 is still as the time reference residential quarter for CC3;
Step 605: after a period of time, the base station sends the auxiliary residential quarter of activation control element and reactivates CC2, this moment, CC2 became reception TA control element and/or time reference residential quarter, CC3 no longer receives the TA control element, if be used as the time reference residential quarter before the CC3, so follow-up CC3 is not as the time reference residential quarter.
Embodiment 5
Fig. 7 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 5, as shown in Figure 7, may further comprise the steps:
Step 701:UE initiates RRC at CC1 and connects, and the base station connects information and the grouping information that disposes CC2, CC3 and CC4 in the reallocation message to UE at RRC.CC1 is main Serving cell, composition group 1, and CC2～CC4 is auxiliary serving cell, composition group 2; The base station has disposed random access resource in CC2, initiate the RACH process when being used for group 2 uplink synchronous; Base station and UE think that the residential quarter that has been configured random access resource is as receiving the TA control element or/and the time reference residential quarter.
Step 702: with embodiment 4 steps 602.
Step 703: with embodiment 4 steps 603.
Step 704: when the deexcitation timer expiry of CC2, the CC2 deexcitation; This moment, the base station sent auxiliary residential quarter deexcitation control element deexcitation CC3 and CC4.
Perhaps base station and UE are defaulted as at this moment CC3 and deexcitation of CC4.
Step 705: the base station sends RRC and connects reallocation message, carries the random access resource of CC3 in the message, is used for group 2 uplink synchronous and initiates the RACH process.
Step 706: the base station sends auxiliary residential quarter active control element and activates CC3 and CC4.
Step 707: the uplink synchronous of base station indication UE initiation group 2 on CC3.
After the uplink synchronous of step 708:CC3 was finished, group 2 entered synchronous regime, and CC3 can be used as and receives TA and time reference residential quarter; Perhaps only as the residential quarter that receives TA, CC2 still can be used as the time reference residential quarter to CC3.
Embodiment 6
Fig. 8 is the detail flowchart according to the cell selecting method in the multi-carrier communications systems of embodiment 6, as shown in Figure 8, may further comprise the steps:
Step 801:UE initiates RRC at CC1 and connects, and the base station connects information and the grouping information that disposes CC2, CC3 and CC4 in the reallocation message to UE at RRC.CC1 is main Serving cell, composition group 1, and CC2～CC4 is auxiliary serving cell, composition group 2; The base station has disposed random access resource in CC2, initiate the RACH process when being used for group 2 uplink synchronous; Base station and UE think that the residential quarter that has been configured random access resource is as receiving TA control element and/or time reference residential quarter;
Step 802: because group 2 is carried out timing adjustment with the different TA of group 1 use, organizing so when auxiliary residential quarter in 2 is activated for the first time to have at least one residential quarter to carry out the initial uplink synchronizing process.CC2 has disposed random access resource, and CC2 need to be activated so that UE adopts the random access resource on the CC2 to carry out uplink synchronous in the base station so, and the base station sends auxiliary residential quarter and activates MAC control element activation CC2, CC3, CC4;
Step 803:UE has activated CC2 after having used auxiliary residential quarter control element, and finishes the initial uplink synchronizing process at CC2.CC3 and CC4 have also entered the uplink synchronous state, and UE can carry out uplink at CC2, CC3 and CC4, and CC1 can be used as the time reference residential quarter of these residential quarters;
Step 804: the base station sends the time adjustment TA control element that is used for group 2 to UE on CC1, indicate this TA control element to send to group 2 by the cell ID in the control element.
Step 805:UE receives the TA control element at CC1, reads the time adjustment that this control element of identification discovery that carries in the control element is used for group 2, then organizes 2 and uses this times adjustment TA control element.CC1 is as the residential quarter that receives the TA control element.
From above description, can find out, the invention solves in the correlation technique after having introduced a plurality of TA groupings, only comprise in the grouping of auxiliary residential quarter auxiliary residential quarter how access time reference cell and How to choose time of reception lead TA control element the problem of residential quarter, this scheme has adapted in the multi-carrier communications systems many TA and the demand of dividing into groups more, can provide more accurate TA control for each grouping, thereby so that the upstream data of each UE all falls in the time of reception window of base station when arriving the base station, reduce the losing probability of upstream data, thereby improved the service performance of whole system.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby they can be stored in the storage device, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the cell selecting method in the multi-carrier communications systems is characterized in that, comprising:
For the grouping that only comprises auxiliary residential quarter, user equipment (UE) and/or base station are selected respectively for the residential quarter of time of reception lead TA control element and/or as the residential quarter of time reference for each described grouping.
2. method according to claim 1 is characterized in that, be used for to receive the TA control element the residential quarter and/or as the selection mode of the residential quarter of time reference comprise following one of at least:
Mode one, the base station be used for to receive the residential quarter of TA control element and/or as the residential quarter of time reference to described user device configuration;
Mode two selects to carry out in the described grouping the auxiliary residential quarter of Random Access Channel RACH process as the residential quarter that is used for receiving the residential quarter of TA control element and/or is used as time reference;
Mode three, select all auxiliary residential quarter small areas of described grouping to identify minimum or maximum auxiliary residential quarter as the auxiliary residential quarter of time reference, perhaps, the minimum or maximum auxiliary residential quarter of the auxiliary residential quarter small area sign of selecting to have activated in the described grouping is as the auxiliary residential quarter that is used for receiving the TA control element and/or as the auxiliary residential quarter of time reference;
Mode four, the auxiliary residential quarter of selecting that any has activated in the described grouping is as the auxiliary residential quarter that is used for receiving the TA control element and/or as the auxiliary residential quarter of time reference;
Mode five selects the main plot as the residential quarter that is used for receiving the TA control element of auxiliary cell group and/or is used as time reference.
3. method according to claim 1 and 2, it is characterized in that, when the residential quarter as time reference of selecting is auxiliary residential quarter, the auxiliary residential quarter as time reference of described selection activated with unactivated situation under, all as the auxiliary residential quarter that is used as time reference in the described grouping; The residential quarter that being used for of selecting receives the TA control element only in situation about having activated as the residential quarter that is used for receiving the TA control element.
4. method according to claim 2 is characterized in that, is being after group selection in described minute is used for receiving the TA control element and/or is used as the residential quarter of time reference, also to comprise:
Described selection be used for to receive the TA control element and/or as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, reselect an auxiliary residential quarter in the auxiliary residential quarter of in described grouping, having activated as the auxiliary residential quarter that is used for receiving the TA control element and/or is used as time reference, perhaps, reselect an auxiliary residential quarter in the auxiliary residential quarter of in described grouping, having activated as the auxiliary residential quarter that is used for receiving the TA control element, keep and adopt the original described auxiliary residential quarter of selecting as described auxiliary residential quarter as time reference.
5. method according to claim 4 is characterized in that, after adopting described mode one to select to be used for reception TA control element and/or being used as the auxiliary residential quarter of time reference, also comprises:
Described selection be used for to receive the TA control element and as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, again be used for to receive the auxiliary residential quarter of TA control element and/or as the auxiliary residential quarter of time reference to described user device configuration by described mode one in the auxiliary residential quarter that described base station has been activated in described grouping, perhaps, in the auxiliary residential quarter in described grouping, activated of described subscriber equipment by the new auxiliary residential quarter of selecting to be used for to receive the TA control element of described mode two, mode three or mode quadruple and/or as the auxiliary residential quarter of time reference.
6. method according to claim 4 is characterized in that, after adopting described mode two to select to be used for reception TA control element and/or being used as the auxiliary residential quarter of time reference, also comprises:
Described selection be used for to receive the TA control element and as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, in the auxiliary residential quarter that described subscriber equipment has activated in described grouping by the new auxiliary residential quarter that is used for receiving the auxiliary residential quarter of TA control element and/or is used as time reference selected of described mode two, mode three or mode quadruple.
7. method according to claim 4 is characterized in that, after adopting described mode three to select to be used for reception TA control element and/or being used as the auxiliary residential quarter of time reference, also comprises:
Described selection be used for to receive the TA control element and as the auxiliary residential quarter un-activation of time reference or situation about being deactivated under, in the auxiliary residential quarter that described subscriber equipment has activated in described grouping by the new auxiliary residential quarter that is used for receiving the auxiliary residential quarter of TA control element and/or is used as time reference selected of described mode three or mode quadruple.
8. each described method according to claim 4-7, it is characterized in that, in the auxiliary residential quarter of selecting first in the situation of unactivated state variation for the state that activated, described subscriber equipment recover will the described auxiliary residential quarter of selecting first as the residential quarter that is used for receiving the TA control element in the described grouping and/or is used as time reference.
9. the cell selecting apparatus in the carrier communication system is characterized in that, comprising:
Select module, be used to each grouping that only comprises auxiliary residential quarter to select respectively for the residential quarter of time of reception lead TA control element and/or as the residential quarter of time reference.
10. device according to claim 9 is characterized in that, described device is arranged in base station and/or user equipment (UE).
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| 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 |
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| CN201110226036.8A CN102932880B (en) | 2011-08-08 | 2011-08-08 | Cell selecting method and device in multi-carrier communications systems |
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| CN110958070A (en) * | 2018-09-27 | 2020-04-03 | 华为技术有限公司 | Reference time determination method and device |
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| CN108521669A (en) * | 2013-04-03 | 2018-09-11 | Lg 电子株式会社 | The method and apparatus for sending uplink data using multiple serving cells |
| 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 |
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| CN105532051A (en) * | 2013-04-15 | 2016-04-27 | 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 kind of methods, devices and systems of activation/deactivation time cell |
| CN104769986A (en) * | 2013-11-07 | 2015-07-08 | 华为技术有限公司 | Method, device and system for activating/deactivating secondary cell |
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| CN106068666B (en) * | 2014-03-05 | 2019-08-27 | 高通股份有限公司 | For the timer configuration of the secondary cell in the LTE/LTE-A network using unlicensed spectrum |
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| CN110035491B (en) * | 2018-01-11 | 2020-06-19 | 维沃移动通信有限公司 | Synchronization indication method and device |
| WO2019137422A1 (en) * | 2018-01-11 | 2019-07-18 | 维沃移动通信有限公司 | Synchronization indication method and device |
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| CN110958070B (en) * | 2018-09-27 | 2021-08-20 | 华为技术有限公司 | Reference time determination method and device |
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Also Published As
| Publication number | Publication date |
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| CN102932880B (en) | 2018-03-27 |
| WO2013020504A1 (en) | 2013-02-14 |
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