CN103313375A - Random access method for auxiliary service cell and user equipment (UE) - Google Patents
Random access method for auxiliary service cell and user equipment (UE) Download PDFInfo
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- CN103313375A CN103313375A CN2012100662366A CN201210066236A CN103313375A CN 103313375 A CN103313375 A CN 103313375A CN 2012100662366 A CN2012100662366 A CN 2012100662366A CN 201210066236 A CN201210066236 A CN 201210066236A CN 103313375 A CN103313375 A CN 103313375A
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Abstract
The invention discloses a random access method for an auxiliary service cell and UE (User Equipment). The method comprises the following steps: the UE receives an auxiliary service cell activating MAC (Media Access Control) control element coming from a base station, wherein the MAC control element indicates that a random access process is required to be initiated on a first auxiliary service cell; the UE informs the first auxiliary service cell, not starts a deactivation timer of the first auxiliary service cell after the first auxiliary service cell is activated, and starts the deactivation timer after the random access process is finished. Due to the adoption of the random access method, the problem of failure of the random access process caused by timeout of the deactivation timer of the auxiliary service cell in the related technologies is solved, the deactivation timer can be started and stopped flexibly when the random access process is implemented by the auxiliary service cell, random access can be finished successfully, the efficiency of random access is increased, and the system performance is improved.
Description
Technical field
The present invention relates to the communications field, accidental access method and subscriber equipment (UserEquipment is referred to as UE) on a kind of auxiliary serving cell.
Background technology
Advanced long-term evolution system (Long Term Evolution Advance, referred to as LTE-Advanced) in introduced a lot of new technologies and satisfied senior international wireless communication system (International Mobile Telecommunication Advance, referred to as IMT-Advanced) primary demand, wherein a most important technology is exactly carrier aggregation.
The index of IMT-Advanced requirement peak rate is very high (supports 100Mbps under the high mobility, support 1Gbps under the Hypomobility), but the current wireless frequency spectrum resource is comparatively in short supply, present LTE standard maximum bandwidth is 20MHz, but this bandwidth still can't satisfy the requirement of IMT-Advanced, so need to extend to bandwidth, such as 40MHz, 60MHz, even higher bandwidth.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), UE can be simultaneously on a plurality of component carriers and evolved base station (E-UTRAN NodeB is referred to as eNB) receive and dispatch transmission.Component carrier can use the defined frequency range of LTE, also can use the frequency range that increases newly specially as LTE-Advanced.Nervous based on present frequency spectrum resource, can not always have continuous component carrier can distribute to operator on the frequency domain 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 system, the main plot refers to that UE initiates the residential quarter that Radio Resource control (Radio Resource Control is referred to as 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 configures after UE enters the RRC connection status, is used for providing extra Radio Resource.In this system, Serving cell comprises main plot and auxiliary residential quarter.
After introducing carrier aggregation technology, UE can receive and dispatch transmission at a plurality of Serving cells simultaneously at RRC connected state (RRC_CONNECTED), still for the UE of 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, distribute base station and the not immediately enterprising row data transmitting-receiving in this newly-increased residential quarter of UE behind these newly-increased residential quarters, 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, but on this residential quarter, do not send business datum to the base station, 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.UE is at deexcitation timer of each auxiliary cell maintenance, and the duration of timer is configured by the base station.Duration according to timer is different, and the deexcitation of auxiliary residential quarter both can be controlled by UE (when being timer duration arrival), also can be controlled by the base station (being that the base station sends the auxiliary residential quarter of auxiliary residential quarter deexcitation MAC control element deexcitation).
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 UE, the opportunity that the TA that UE 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 UEs all arrives the base station within the receive window of base station.If in the residential quarter for certain UE configuration, the propagation delay time of each minizone differs larger, then 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 residential quarter (namely safeguarding TAT) of timer is also adjusted simultaneously as the residential quarter that receives the TA control element in the main plot as preventive maintenance time, and only carries out at main Serving cell (being the main plot) for the random access procedure of initial acquisition uplink synchronous.After main Serving cell is finished random access procedure and entered synchronous regime, need not to carry out random access after other auxiliary serving cell (being auxiliary residential quarter) activates and directly be in synchronous regime.After the concept of introducing grouping and many TA, a plurality of residential quarters may be in the different groupings.For the grouping that comprises main Serving cell, the method for obtaining uplink synchronous is constant.For the grouping that only comprises auxiliary serving cell, after activating, the residential quarter before the initiation uplink synchronous, need to determine whether first to be in the uplink synchronous state.If this grouping this moment is not in the uplink synchronous state, then need first transmitting uplink data to be carried out in this grouping synchronously again, namely the auxiliary serving cell of certain in grouping is finished random access procedure to obtain TA.
According to existing agreement, auxiliary serving cell can start auxiliary serving cell deexcitation timer immediately after activation, if follow-up discovery need to be finished uplink synchronous in auxiliary serving cell, then can carry out random access procedure in this auxiliary serving cell.If but when certain auxiliary serving cell is carried out random access procedure, the deexcitation timer expiry of auxiliary serving cell, auxiliary serving cell can enter deactivation status so, can't finish random access procedure in this case.
Summary of the invention
The invention provides the accidental access method on a kind of auxiliary serving cell, solving at least auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure.
According to an aspect of the present invention, accidental access method on a kind of auxiliary serving cell is provided, comprise: the auxiliary serving cell that UE receives from the base station activates the MAC control element, wherein, described MAC control element indicating need to be on the first auxiliary serving cell initiating random access procedure; Described UE notifies described the first auxiliary serving cell, does not open the deexcitation timer of described the first auxiliary serving cell after described the first auxiliary serving cell activates, and just opens described deexcitation timer after described random access procedure is finished.
Preferably, after the auxiliary serving cell activation MAC control element of UE reception from the base station, also comprise: UE notifies the second auxiliary serving cell, after described the second auxiliary serving cell activates, open the deexcitation timer of described the second auxiliary serving cell, wherein, described the second auxiliary serving cell is not for needing the auxiliary serving cell of initiating random access procedure.
Preferably, described MAC control element comprises the first identification field and the second identification field, wherein, described the first identification field is used for sign needs the described auxiliary serving cell of activation/deactivation, and whether described the second identification field is used for sign needs at described auxiliary serving cell initiating random access procedure.
Preferably, described MAC control element also comprises the 3rd identification field, and wherein, described the 3rd identification field is for keeping the territory.
According to another aspect of the present invention, accidental access method on a kind of auxiliary serving cell also is provided, comprise: UE receives and to initiate after the PDCCH order message of random access or during the beginning random access procedure from described the 3rd auxiliary serving cell of the indication of base station, stop the deexcitation timer of described the 3rd auxiliary serving cell, after described random access procedure is finished, start or restart described deexcitation timer, wherein, start the timing that refers to continue on the basis that stops the deexcitation timer this deexcitation timer of operation; Restart and refer to the timing that starts anew of deexcitation timer.
Preferably, after described random access procedure is finished, start or restart described deexcitation timer, comprising: receive as UE to start behind the accidental access response message of described the 3rd auxiliary serving cell or restart described deexcitation timer.
Preferably, after described random access procedure is finished, start or restart described deexcitation timer, comprising: after described the 3rd auxiliary serving cell is used Timing Advance in the accidental access response message, start or restart described deexcitation timer.
According to a further aspect of the invention, a kind of UE is provided, has comprised: the first receiver module, the auxiliary serving cell that is used for receiving from the base station activates the MAC control element, wherein, described MAC control element indicating need to be on the first auxiliary serving cell initiating random access procedure; The first notification module is used for notifying described the first auxiliary serving cell, does not open the deexcitation timer of described the first auxiliary serving cell after described the first auxiliary serving cell activates, and just opens described deexcitation timer after described random access procedure is finished.
Preferably, described UE also comprises: the second notification module, be used for notifying the second auxiliary serving cell, after described the second auxiliary serving cell activates, open the deexcitation timer of described the second auxiliary serving cell, wherein, described the second auxiliary serving cell is not for needing the auxiliary serving cell of initiating random access procedure.
According to a further aspect of the invention, a kind of UE is provided, comprise: stopping modular, be used for receiving from described the 3rd auxiliary serving cell of the indication of base station and initiate after the PDCCH order message of random access or during the beginning random access procedure, stop the deexcitation timer of described the 3rd auxiliary serving cell; Restart module, be used in the situation that described random access procedure is finished, start or restart described deexcitation timer.
By the present invention, adopted following method: control enabling of deexcitation timer and stop by activating MAC control element or PDCCH order message, solved auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure, and then when auxiliary serving cell when carrying out random access procedure, the deexcitation timer is enabled flexibly and is stopped, the random access successfully that makes, improve the efficient of random access, promoted systematic function.
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 flow chart one according to the accidental access method on the auxiliary serving cell of the embodiment of the invention;
Fig. 2 is the flowchart 2 according to the accidental access method on the auxiliary serving cell of the embodiment of the invention;
Fig. 3 is the schematic diagram according to the carrier aggregation covering of the embodiment of the invention;
Fig. 4 is the flow chart one according to the accidental access method on the auxiliary serving cell of the embodiment of the invention one;
Fig. 5 is the flowchart 2 according to the accidental access method on the auxiliary serving cell of the embodiment of the invention one;
Fig. 6 is the flow chart according to the accidental access method on the auxiliary serving cell of the embodiment of the invention two;
Fig. 7 is the flow chart one according to the accidental access method on the auxiliary serving cell of the embodiment of the invention three;
Fig. 8 is the flowchart 2 according to the accidental access method on the auxiliary serving cell of the embodiment of the invention three;
Fig. 9 is the carrier aggregation system configuration diagram according to the embodiment of the invention;
Figure 10 is the structured flowchart one according to the UE of the embodiment of the invention;
Figure 11 is the structured flowchart two according to the UE of the embodiment of the invention; And
Figure 12 is the structured flowchart three according to the UE of the embodiment of the invention.
Embodiment
Hereinafter also describe in conjunction with the embodiments the present invention in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature among the embodiment among the application can make up mutually.
Based on auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure, the embodiment of the invention provides the accidental access method on a kind of auxiliary serving cell, and its flow process comprises that step S102 is to step S104 as shown in Figure 1:
The auxiliary serving cell that step S102, UE receive from the base station activates the MAC control element, wherein, MAC control element indicating need to be on the first auxiliary serving cell initiating random access procedure;
Step S104, UE notify the first auxiliary serving cell, do not open the deexcitation timer of the first auxiliary serving cell after the first auxiliary serving cell activates, and just open the deexcitation timer after random access procedure is finished.
Pass through the embodiment of the invention, adopted following method: when UE receives that auxiliary serving cell active control element activates auxiliary residential quarter, carry out corresponding operating by auxiliary serving cell activation/deactivation control element notice auxiliary serving cell, namely notice needs to carry out the auxiliary serving cell of random access, after auxiliary serving cell activates, wouldn't open or restart auxiliary serving cell deexcitation timer, after random access procedure is finished, open again auxiliary serving cell deexcitation timer; Notice does not need to carry out the auxiliary serving cell of random access, opens after activating in auxiliary serving cell or restarts auxiliary serving cell deexcitation timer.The present embodiment is controlled enabling of deexcitation timer by activation MAC control element and is stopped, solved auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure, and then when auxiliary serving cell when carrying out random access procedure, the deexcitation timer is enabled flexibly and is stopped, so that access successfully at random, improved the efficient of random access, promoted systematic function.
In the implementation process, after step S102 carried out, UE notified the second auxiliary serving cell, after the second auxiliary serving cell activates, open the deexcitation timer of the second auxiliary serving cell, wherein, the second auxiliary serving cell is not for needing the auxiliary serving cell of initiating random access procedure.
In above-mentioned steps, the MAC control element can comprise the first identification field and the second identification field, and wherein, the first identification field is used for sign needs the activation/deactivation auxiliary serving cell, and whether the first identification field is used for sign needs at the auxiliary serving cell initiating random access procedure.In specific implementation process, the MAC control element can also comprise the 3rd identification field, and wherein, the 3rd identification field is for keeping the territory.
Further specify below in conjunction with table 1 pair above-mentioned MAC control element.The design of auxiliary serving cell activation/deactivation MAC control element is as shown in table 1:
Table 1
Wherein, each identifier implication is as follows:
Ci: this territory is used for auxiliary serving cell activation or the deexcitation that expression is designated i; Represent that when the Ci territory equals 1 auxiliary serving cell Ci is activated, represent that when the Ci territory equals 0 auxiliary serving cell Ci is deactivated.
Ii: this territory is used to indicate after auxiliary serving cell Ci activates, whether need to be on this auxiliary serving cell initiating random access procedure; Namely representing when the Ii territory equals 1 needs to carry out random access procedure on the auxiliary serving cell Ci, representing when the Ii territory equals 0 does not need to carry out random access procedure on the auxiliary serving cell Ci.The Ii territory only equal in the Ci territory 1 o'clock effective.
Ri: this territory is set to " 0 " for keeping the territory.
Based on auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure, the embodiment of the invention also provides the accidental access method on a kind of auxiliary serving cell, and its flow process comprises that step S202 is to step S204 as shown in Figure 2:
Step S202, UE receives the PDCCH order message from the base station, and wherein, PDCCH order message indicating need to be carried out random access procedure in the 3rd auxiliary serving cell;
Step S204, UE stop the deexcitation timer of the 3rd auxiliary serving cell, after random access procedure is finished, restart the deexcitation timer.
By the embodiment of the invention, adopted the auxiliary serving cell of following method: UE to activate after, start or restart auxiliary serving cell deexcitation timer; After certain auxiliary serving cell is received the PDCCH order message that the base station sends or during the beginning random access procedure, stop first auxiliary residential quarter deexcitation timer, carry out random access procedure, after random access procedure is finished, start or restart the auxiliary residential quarter deexcitation timer of execution random access procedure, solved auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure, and then when auxiliary serving cell when carrying out random access procedure, the deexcitation timer is enabled flexibly and is stopped, so that access successfully at random, improved the efficient of random access, promoted systematic function.
Wherein, after random access procedure is finished, start or restart the deexcitation timer, can comprise two kinds of situations:
The first: receive as UE to start behind the accidental access response message of the 3rd auxiliary serving cell or restart the deexcitation timer.
The second: after the 3rd auxiliary serving cell is used Timing Advance in the accidental access response message, start or restart the deexcitation timer.
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is further set forth.
Embodiment one
Based in the carrier aggregation system of many TA, when an auxiliary serving cell in the auxiliary serving cell grouping is carried out random access procedure, because the deexcitation timer expiry of auxiliary serving cell, and then cause the problem of random access procedure failure, the MAC agreement of a pair of UE of the preferred embodiment of the present invention produces changes, namely need to introduce a new auxiliary serving cell activation/deactivation MAC control element, need to activate auxiliary serving cell, the operation of auxiliary serving cell deexcitation timer makes amendment.The below is described for example with mode of frequency division duplexing (Frequency Division Duplex is referred to as FDD).
As shown in Figure 3, 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.UE resides in CC1 and upward and at CC1 initiates the RRC connection procedure, and CC1 is considered to the main Serving cell of UE, and CC1 is in group 1.Serving cell CC2, CC3 and CC4 are auxiliary serving cell, in group 2.CC1 is respectively 0～3 to the cell ID of CC4.
The main process that the present embodiment is realized can comprise the treatment step of two summations, and its flow process comprises that step S402 is to step S404 as shown in Figure 4:
Step S402, the opportunity that auxiliary residential quarter starts (restarting) auxiliary residential quarter deexcitation timer is controlled by auxiliary residential quarter deexcitation MAC control element in the base station;
Step S404, the auxiliary serving cell of UE is opened (or restarting) auxiliary residential quarter deexcitation timer according to the base station indication.
In specific implementation process, the schematic diagram that the carrier aggregation of the present embodiment employing Fig. 3 covers is as the basis, then further refinement of the processing of Fig. 4, whole flow processs after the refinement can (not only comprise the treatment step among Fig. 4 as shown in Figure 5, also comprised preprocessing process and subsequent operation before the above-mentioned steps), comprise that step S502 is to step S514:
Step S502, UE initiate RRC at CC1 and connect, and CC1 is main Serving cell, and the grouping of CC1 place is defined as group 1, i.e. main Serving cell grouping.Group sign (GroupIndex) is fixed value 0.The TAT duration of group 1 is 1280ms.
Step S504, the base station uses RRC message to configure the grouping information of CC2, CC3 and CC4 to UE, base station configuration CC2 and CC1 be in same grouping, CC3 and CC4 in same grouping and with CC1 not in same grouping.This moment, CC2 belonged to the main plot grouping, and CC3 and CC4 belong to auxiliary cell group.
After step S506, UE receive the RRC configuration messages, use configuration information wherein, and send configuration response message to eNB, configuration is accepted in expression, and wherein, configuration information comprises packet configuration information.
Step S508, the base station sends auxiliary residential quarter to UE and activates the MAC control element, so that the follow-up activation of UE CC2, CC3 and CC4, and not starting auxiliary residential quarter deexcitation timer after using control element indication CC3 to activate, CC2, CC4 start auxiliary residential quarter deexcitation timer after activation.
The auxiliary residential quarter activation MAC control element that step S510, UE use from the base station activates each auxiliary serving cell.After CC2 activates, owing to belonging to the main plot grouping, therefore be in the uplink synchronous state.CC3 and CC4 belong to auxiliary cell group after activation, need to just enter the uplink synchronous state after CC3 finishes random access procedure.At this moment, CC3 does not start or restarts the deexcitation timer of himself; CC4 starts the deexcitation timer of himself.
Step S512, the base station sends PDCCH order (PDCCH order) message to UE after CC2 and CC3 and CC4 activation, and UE carries out random access procedure at CC3 with indication, and then the uplink synchronous of foundation group 2.
Step S514, UE carries out random access procedure at CC3, the uplink synchronous of foundation group 2.After random access was finished, the auxiliary serving cell deexcitation timer on the CC3 started.
Embodiment two
The present embodiment adopts schematic diagram that the carrier aggregation of Fig. 3 covers as the basis, follows the summation flow process of Fig. 4, and is just different aspect details, and its flow process comprises that step S602 is to step S628 as shown in Figure 6:
Step S602, UE initiate RRC at CC1 and connect, and CC1 is main Serving cell, and the grouping of CC1 place is defined as group 1, think that here the group character (GroupIndex) of group 1 is 0, i.e. main Serving cell grouping.The TAT duration of group 1 is 1280ms.
Step S604, the base station uses RRC message to configure the grouping information of CC2, CC3 and CC4 to UE, they belong to same grouping, i.e. auxiliary cell group, group is designated 2, with CC1 not in same grouping.CC2～CC4 is in the auxiliary serving cell grouping.
After step S606, UE receive the RRC configuration messages, use configuration information wherein, and send response message to eNB, configuration is accepted in expression, and wherein, configuration information comprises packet configuration information.
Step S608, the base station sends auxiliary residential quarter to UE and activates the MAC control element, so that the follow-up activation of UE CC2, CC3 and CC4 comprise the information that indication CC2 is the auxiliary serving cell of the random access of follow-up execution simultaneously in the MAC control element.Control element does not start auxiliary residential quarter deexcitation timer after can also indicating CC2 to activate, and CC3 and CC4 can start auxiliary residential quarter deexcitation timer after activation.
The auxiliary residential quarter activation MAC control element that step S610, UE use from the base station activates each auxiliary serving cell.CC2, CC3 and CC4 need to just enter the uplink synchronous state after CC2 finishes random access procedure after activation.The auxiliary residential quarter deexcitation timer of CC2 does not start or restarts at this moment; The auxiliary serving cell deexcitation timer of CC3 and CC4 starts.
Step S612, the base station sends PDCCH order message indication UE and carries out random access procedure at CC2, the uplink synchronous of foundation group 2 after CC2 and CC3 and CC4 activation.
Step S614, UE carry out the uplink synchronous of random access procedure foundation group 2 at CC2.After random access was finished, the auxiliary residential quarter deexcitation timer on the CC2 started.CC2 is the time reference residential quarter (timing reference CC) of group 2.
Step S616, after a period of time, base station configuration CC2 is in group 1.The time reference cell change of group 2 is CC3.For obtaining accurately TA value, random access procedure need to be carried out at CC3 in the base station.
Step S618, the base station sends auxiliary residential quarter deexcitation MAC control element with deexcitation CC3 to UE.
Step S620, UE receives the auxiliary residential quarter deexcitation MAC control element from the base station, and uses this control element deexcitation CC3 and auxiliary residential quarter deexcitation timer out of service.
Step S622, the base station sends auxiliary residential quarter to UE and activates MAC control element activation CC3, and the auxiliary residential quarter deexcitation timer of notice CC3 wouldn't restart or start in control element.
Step S624, UE use auxiliary residential quarter and activate MAC control element activation CC3, but do not restart or start the auxiliary residential quarter deexcitation timer of CC3.
Step S626, the base station sends PDCCH order message indication UE and carries out random access procedure at CC3, the uplink synchronous of foundation group 2.
Step S628, UE carries out random access procedure at CC3, the uplink synchronous of foundation group 2.After random access was finished, the auxiliary serving cell deexcitation timer on the CC3 started.
Embodiment three
The main process that the present embodiment is realized can comprise the treatment step of two summations, and its flow process comprises that step S702 is to step S704 as shown in Figure 7:
Step S702, the base station is certain auxiliary serving cell initiating random access procedure of indication after the auxiliary serving cell that activates the auxiliary serving cell grouping;
Step S704, auxiliary serving cell is received after auxiliary residential quarter active control element activates and is started (restarting) auxiliary residential quarter deexcitation timer, receive that the auxiliary serving cell of carrying out random access indication stops auxiliary serving cell deexcitation timer, finishes the auxiliary serving cell deexcitation timer that random access moved or restarted this auxiliary serving cell afterwards.
In specific implementation process, the schematic diagram that the carrier aggregation of the present embodiment employing Fig. 4 covers is as the basis, then further refinement of the processing of Fig. 7, whole flow processs after the refinement can (not only comprise the treatment step among the figure as shown in Figure 8, also comprised preprocessing process and subsequent operation before the above-mentioned steps), comprise that step S802 is to step S818:
Step S802, UE initiate RRC at CC1 and connect, and CC1 is main Serving cell, and the grouping of CC1 place is defined as group 1, think that here the group character (GroupIndex) of group 1 is 0, i.e. main Serving cell grouping.The TAT duration of group 1 is 1280ms.
Step S804, the base station uses RRC message to configure the grouping information of CC2, CC3 and CC4 to UE, they belong to same grouping, i.e. auxiliary cell group (group 2), with CC1 not in same grouping.CC2～CC4 is in the auxiliary serving cell grouping.
After step S806, UE receive the RRC configuration messages, use configuration information wherein, and send configuration response message to eNB, configuration is accepted in expression, and wherein, configuration information comprises packet configuration information.
Step S808, the base station sends auxiliary residential quarter to UE and activates the MAC control element, activates CC2, CC3 and CC4.
The auxiliary residential quarter activation MAC control element that step S810, UE use from the base station activates each auxiliary serving cell.CC2, CC3 and CC4 are needing just to enter the uplink synchronous state after random access procedure is finished in a residential quarter therein after the activation.The auxiliary residential quarter deexcitation timer of CC2～CC4 starts or restarts at this moment.
Step S812, the base station sends PDCCH order message indication UE and carries out random access procedure at CC2, the uplink synchronous of foundation group 2 after CC2 and CC3 and CC4 activation.
After step S814, UE receive the PDCCH order message that sends to CC2, stop the auxiliary serving cell deexcitation timer on the CC2, carry out the uplink synchronous of random access procedure foundation group 2 at CC2.After random access was finished, the auxiliary serving cell deexcitation timer on the CC2 continued operation or restarts.CC2 is the time reference residential quarter (timing reference CC) of group 2.
Step S816, after a period of time, base station configuration CC2 is in group 1.The time reference cell change of group 2 is CC3.For obtaining accurately TA value, random access procedure need to be carried out at CC3 in the base station.The base station sends PDCCH order message indication CC3 and carries out random access procedure.
After step S818, UE receive the PDCCH order message that sends to CC3, stop the auxiliary serving cell deexcitation timer on the CC3, carry out the uplink synchronous of random access procedure foundation group 2 at CC3.After random access was finished, the auxiliary serving cell deexcitation timer on the CC3 continued operation or restarts.CC3 is the time reference residential quarter (timing reference CC) of group 2.
The carrier aggregation system of the embodiment of the invention comprises network equipment shown in Figure 9 and portable terminal, wherein, portable terminal is a kind of UE, based on this, the embodiment of the invention also provides a kind of UE, as shown in figure 10, comprise: the first receiver module 10, the auxiliary serving cell that be used for to receive from the base station activates the MAC control element, wherein, MAC control element indicating need to be on the first auxiliary serving cell initiating random access procedure; The first notification module 20 with 10 couplings of the first receiver module, is used for notifying the first auxiliary serving cell, does not open the deexcitation timer of the first auxiliary serving cell after the first auxiliary serving cell activates, and just opens the deexcitation timer after random access procedure is finished.
Figure 11 shows a kind of optimization UE of the present embodiment, can also comprise: the second notification module 30, with 10 couplings of the first receiver module, be used for notifying the second auxiliary serving cell, after the second auxiliary serving cell activates, open the deexcitation timer of the second auxiliary serving cell, wherein, the second auxiliary serving cell is not for needing the auxiliary serving cell of initiating random access procedure.
The embodiment of the invention also provides a kind of UE, comprise the second receiver module 40, stopping modular 50 shown in Figure 12 and restart module 60, wherein, the second receiver module 40, be used for receiving the PDCCH order message from the base station, wherein, PDCCH order message indicating need to be carried out random access procedure in the 3rd auxiliary serving cell; Stopping modular 50 with 40 couplings of the second receiver module, is used for stopping the deexcitation timer of the 3rd auxiliary serving cell; Restart module 60, with stopping modular 50 couplings, be used in the situation that random access procedure is finished, restart the deexcitation timer.
Wherein, in another embodiment, stopping modular 50 stops the deexcitation timer of described the 3rd auxiliary serving cell when initiating random access.
As can be seen from the above description, the present invention has realized following technique effect:
Pass through the embodiment of the invention, adopted following method: control enabling of deexcitation timer and stop by activating MAC control element or PDCCH order message, solved auxiliary serving cell deexcitation timer expiry in the correlation technique, and then cause the problem of random access procedure failure, and then when auxiliary serving cell when carrying out random access procedure, the deexcitation timer is enabled flexibly and is stopped, the random access successfully that makes, improve the efficient of random access, promoted systematic function.
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, thereby, they can be stored in the storage device and be carried out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, 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.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, 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 accidental access method on the auxiliary serving cell is characterized in that, comprising:
The auxiliary serving cell that UE receives from the base station activates the MAC control element, wherein, described MAC control element indicating need to be on the first auxiliary serving cell initiating random access procedure;
Described UE notifies described the first auxiliary serving cell, does not open the deexcitation timer of described the first auxiliary serving cell after described the first auxiliary serving cell activates, and just opens described deexcitation timer after described random access procedure is finished.
2. method according to claim 1 is characterized in that, after the auxiliary serving cell activation MAC control element of UE reception from the base station, also comprises:
UE notifies the second auxiliary serving cell according to described MAC control element indicating, after described the second auxiliary serving cell activates, open the deexcitation timer of described the second auxiliary serving cell, wherein, described the second auxiliary serving cell is not for needing the auxiliary serving cell of initiating random access procedure.
3. method according to claim 1 and 2, it is characterized in that, described MAC control element comprises the first identification field and the second identification field, wherein, described the first identification field is used for sign needs the described auxiliary serving cell of activation/deactivation, and whether described the second identification field is used for sign needs at described auxiliary serving cell initiating random access procedure.
4. method according to claim 4 is characterized in that, described MAC control element also comprises the 3rd identification field, and wherein, described the 3rd identification field is for keeping the territory, and it is zero that the reservation territory is set.
5. the accidental access method on the auxiliary serving cell is characterized in that, comprising:
Described UE receives from the deexcitation timer that stops described the 3rd auxiliary serving cell after the random PDCCH order message that accesses of described the 3rd auxiliary serving cell initiation of the indication of base station, after described random access procedure is finished, start or restart described deexcitation timer;
The deexcitation timer of perhaps initiating to stop when accessing at random described the 3rd auxiliary serving cell after the PDCCHorder message of described UE reception from the random access of described the 3rd auxiliary serving cell initiation of the indication of base station, after described random access procedure is finished, start or restart described deexcitation timer.
6. method according to claim 5 is characterized in that, after described random access procedure is finished, starts or restarts described deexcitation timer, comprising:
Receive as UE and start behind the accidental access response message of described the 3rd auxiliary serving cell or restart described deexcitation timer.
7. method according to claim 5 is characterized in that, after described random access procedure is finished, starts or restarts described deexcitation timer, comprising:
After described the 3rd auxiliary serving cell is used Timing Advance in the accidental access response message, start or restart described deexcitation timer.
8. a user equipment (UE) is characterized in that, comprising:
The first receiver module, the auxiliary serving cell that be used for to receive from the base station activates the MAC control element, wherein, described MAC control element indicating need to be on the first auxiliary serving cell initiating random access procedure;
The first notification module is used for notifying described the first auxiliary serving cell, does not open the deexcitation timer of described the first auxiliary serving cell after described the first auxiliary serving cell activates, and just opens described deexcitation timer after described random access procedure is finished.
9. UE according to claim 8 is characterized in that, described UE also comprises:
The second notification module, be used for notifying the second auxiliary serving cell, after described the second auxiliary serving cell activates, open the deexcitation timer of described the second auxiliary serving cell, wherein, described the second auxiliary serving cell is not for needing the auxiliary serving cell of initiating random access procedure.
10. a user equipment (UE) is characterized in that, comprising:
Stopping modular is used for receiving from described the 3rd auxiliary serving cell of the indication of base station and initiates after the PDCCHorder message of random access or during initiating random access procedure, stop the deexcitation timer of described the 3rd auxiliary serving cell;
Restart module, be used in the situation that described random access procedure is finished, start or restart described deexcitation timer.
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