CN102573099B - A kind of method and device upgrading the descending timing reference carrier wave of sTAG - Google Patents
A kind of method and device upgrading the descending timing reference carrier wave of sTAG Download PDFInfo
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- CN102573099B CN102573099B CN201210019550.9A CN201210019550A CN102573099B CN 102573099 B CN102573099 B CN 102573099B CN 201210019550 A CN201210019550 A CN 201210019550A CN 102573099 B CN102573099 B CN 102573099B
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Abstract
The invention discloses a kind of method and the device that upgrade the descending timing reference carrier wave of assisted cell timing alignment group sTAG, upgrade the descending timing reference carrier wave of sTAG corresponding to UE with in time, accurately.Upgrade the method for the descending timing reference carrier wave of sTAG, comprising: user terminal UE determines whether the community of initiating random access procedure RA in current timing alignment group TAG changes; UE, when the community of determining to initiate RA changes, carries out in the process of new RA in the community of initiating new RA, the descending timing reference carrier wave of the sTAG of UE according to the cell update of the new RA of described initiation, line correlation process of going forward side by side.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method and the device that upgrade sTAG (SecondaryCellTimeAlignmentGroup, assisted cell timing alignment group) descending timing reference carrier wave.
Background technology
Along with to CA (CarrierAggregation, carrier aggregation) technical research further deeply, some CA scene no longer possesses the condition continuing to adopt main plot (PCell, PrimaryCell) as the descending timing reference carrier wave of SCellTAG (hereinafter abbreviated as sTAG) uplink.Therefore, RAN2 (RadioAccessNetworkWorkGroup2, Radio Access Network working group 2) special consideration has been carried out to the descending timing reference carrier wave of SCellTAG, and determine to initiate RA (RandomAccessProcedure with the last in this sTAG, random access procedure) carrier wave as descending timing reference carrier wave, but UE should not propose clear and definite scheme at the descending timing reference carrier wave when changing sTAG.
1) carrier aggregation technology and TA group
Compared to LTE (LongTermEvolution, Long Term Evolution) system, the peak-rate requirements of LTE-A (LongTermEvolutionAdvanced, Long Term Evolution) system has a very large lifting, requirement reaches descending 1Gbps, up 500Mbps.Meanwhile, lte-a system requires and LTE system compatibility.Based on compatible and make full use of the consideration of frequency spectrum resource to improving peak rate and LTE system, lte-a system introduces CA technology.
Rel-11 is owing to supporting many TA (Multi-TA, MultipleTimeAlignment), UE needs to support multiple up timing relationship simultaneously, and the same UE of synchronization is also not quite similar to the maintenance condition of synchronous regime on the Serving cell with different up timing relationship.Therefore, RAN2 introduces the concept of TA group (TAG, TimeAlignmentGroup, timing alignment group), and some Serving cells with identical up TA value form a TA group.
2) descending timing reference
In order to ensure that the signal that the UE different apart from base station far and near distance sends at same sub-frame of uplink arrives base station simultaneously, the sub-frame of uplink i of UE sends the time advance (N of time than corresponding descending sub frame i downlink data receiving of upstream data
tA+ N
tAoffset) × T
ssecond, as shown in Figure 1, wherein: 0≤N
tA≤ 20512; For FDD (FrequencyDivisionDuplexing, Frequency Division Duplexing (FDD)), N
tAoffset=0; For TDD (TimeDivisionDuplexing, time division duplex), N
tAoffset=624.
3) the descending timing reference carrier wave of TAG
At present, in the CA of Rel-10, the descending timing reference carrier lock needed for UE transmitting uplink data is PCell.Under many TA scene of Rel-11, because the descending timing difference of (as CA scene 4) SCell and PCell in some scenarios can reach 31.3us, adopt PCell as the descending timing reference carrier wave of SCell uplink if continue, then eNB (base station of evolution) may be caused normally cannot to receive the problem of the upstream data that UE transmits on SCell.
Because the transmitting uplink data in Serving cells all in TAG all needs to have identical up timing, therefore for the up lead of the Serving cell in same TAG, require corresponding N
tAvalue is identical, and the descending timing reference time point of correspondence is also identical.Through repeatedly discussing, RAN2 finally determines that the descending timing reference carrier wave of all SCell belonging to same sTAG is the last community of initiating Stochastic accessing in this sTAG.
When SCell triggers RA, if current sTAG there is no transmitting uplink data or be in desynchronizing state, be not then very important at the timingreferencecarrier of this TAG of timing changing, if and sTAG is current transmitting uplink data, and eNB triggers RA on other SCell, then need the concrete moment that the descending timing reference carrier wave (i.e. timingreferencecarrier) of clearly this sTAG is changed.
Although RAN2 has determined that in Rel-11 each TAG has oneself descending timing reference carrier wave, and the descending timing reference carrier wave of sTAG is the last community of initiating Stochastic accessing in this TAG, but UE should be still indefinite at the descending timing reference carrier wave when changing sTAG, also do not propose the scheme when changing the descending timing reference carrier wave of sTAG at present.
Summary of the invention
The embodiment of the present invention provides a kind of method and the device that upgrade the descending timing reference carrier wave of sTAG, with in time, upgrades the descending timing reference carrier wave of sTAG of UE accurately.
Upgrade a method for the descending timing reference carrier wave of assisted cell timing alignment group sTAG, comprising:
User terminal UE determines whether the community of initiating random access procedure RA in current timing alignment group TAG changes;
UE, when the community of determining to initiate RA changes, carries out in the process of new RA in the community of initiating new RA, the descending timing reference carrier wave of the sTAG of UE according to the cell update of the new RA of described initiation.
Preferably, the descending timing reference carrier wave of sTAG of the described UE of described renewal, comprise: described UE eat dishes without rice or wine to receive evolution base station eNB send comprise the physical downlink control channel commands PDCCHorder of random accessing message Msg0 after, and when described PDCCHorder is successfully decoded, change the descending timing reference carrier wave of described sTAG.
Preferably, the descending timing reference carrier wave of sTAG of the described UE of described renewal, comprise: when described UE eats dishes without rice or wine to send to described eNB the x duration arrival included before the message Msg1 of Stochastic accessing preamble code, change the descending timing reference carrier wave of described sTAG, wherein said x adjusts the duration required for up transmitting time point for described UE.
Preferably, said method also comprises: described UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, does not upgrade the descending timing reference carrier wave of described sTAG, or confirms that described sTAG does not have corresponding descending timing reference carrier wave.
Preferably, described method also comprises:
STAG, after the descending timing reference carrier wave of the described sTAG of renewal, stops the transmission operation carrying out upstream data, until the new RA success that the community of the new RA of described initiation is initiated;
Described UE is after the described sTAG of renewal descending timing reference carrier wave and before receiving new timing advance TA order, think that sTAG is in desynchronizing state, and carry out following operation: the upstream data of stopping except preamble code and the transmission of detection reference signal SRS; And/or, the SRS resource that the release of notice radio resource control RRC is corresponding; And/or, stop timing alignment timer TAT to run;
Or, described UE is after the described sTAG of renewal descending timing reference carrier wave and before receiving new TA order, think that described sTAG is in non-synchronous regime, described non-synchronous regime refers to the UL transfer of data can not carried out except preamble code, the state that TAT hangs up or TAT is out of service, reservation SRS configures, and carries out following operation: the upstream data of stopping except preamble code and the transmission of SRS; And/or, retain SRS configuration; And/or, hang up TAT or stop TAT running.
Preferably, the descending timing reference carrier wave of sTAG of the described UE of described renewal, comprising:
When the described UE z duration of eating dishes without rice or wine to receive after the accidental access response message Msg2 that described eNB sends arrives, if this accidental access response message Msg2 is successfully decoded, change the descending timing reference carrier wave of described sTAG, wherein said z is the duration of accidental access response message Msg2 and described UE adjust duration needed for transmitting time point of eating dishes without rice or wine and value for described UE successfully decodes.
Preferably, described method also comprises: described UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, does not upgrade the descending timing reference carrier wave of described sTAG.
Preferably, said method also comprises: described UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, confirms that described sTAG enters desynchronizing state.
Preferably, UE, after the descending timing reference carrier wave of the described sTAG of renewal, also comprises: the maintenance process carrying out the synchronous/asynchronous state of sTAG according to the sTAG descending timing reference carrier wave after renewal.
The embodiment of the present invention, also provides a kind of device upgrading the descending timing reference carrier wave of assisted cell timing alignment group sTAG, comprising:
Determining unit, for determining whether the community of initiating random access procedure RA in current TAG changes;
Updating block, when the community for determining to initiate RA in described determining unit changes, carries out in the process of new RA in the community of initiating new RA, the descending timing reference carrier wave of the sTAG of UE according to the cell update of the new RA of described initiation.
Preferably, described device also comprises:
Transmit-Receive Unit, the physical downlink control channel commands PDCCHorder comprising random accessing message Msg0 that the base station eNB receiving evolution for eating dishes without rice or wine sends; And, send to described eNB the message Msg1 including Stochastic accessing preamble code for eating dishes without rice or wine; And, the accidental access response message Msg2 that described eNB sends is received for eating dishes without rice or wine.
Preferably, described Transmit-Receive Unit is further used for, and after receiving described PDCCHorder, and when successfully decoding to described PDCCHorder, starts described updating block and upgrades the descending timing reference carrier wave of described sTAG;
Described updating block, specifically for: when described Transmit-Receive Unit is successfully decoded to described PDCCHorder, upgrade the descending timing reference carrier wave of described sTAG.
Preferably, described Transmit-Receive Unit is further used for, when sending the x duration included before the message Msg1 of Stochastic accessing preamble code to described eNB and arriving, indicate described updating block to change the descending timing reference carrier wave of described sTAG, wherein said x adjusts the duration required for up transmitting time point for described UE;
Described updating block, specifically for: when described Transmit-Receive Unit sends to described eNB the x duration arrival included before the message Msg1 of Stochastic accessing preamble code, change the descending timing reference carrier wave of described sTAG.
Preferably, described updating block is further used for, and described updating block is further used for, during the new RA failure initiated in the community of the new RA of described initiation, do not upgrade the descending timing reference carrier wave of described sTAG, or confirm that described sTAG does not have corresponding descending timing reference carrier wave.
Described device also comprises processing unit:
Processing unit, for after upgrade described sTAG descending timing reference carrier wave at described updating block and before described Transmit-Receive Unit receives new timing advance TA order, think that sTAG is in desynchronizing state, and carry out following operation: the upstream data of stopping except preamble code and the transmission of detection reference signal SRS; And/or, the SRS resource that the release of notice radio resource control RRC is corresponding; And/or, stop timing alignment timer TAT to run;
Or, described processing unit, for after upgrade described sTAG descending timing reference carrier wave at described updating block and before described Transmit-Receive Unit receives new TA order, think that described sTAG is in non-synchronous regime, described non-synchronous regime refers to the UL transfer of data can not carried out except preamble code, the state that TAT hangs up or TAT is out of service, reservation SRS configures, and carries out following operation: the upstream data of stopping except preamble and the transmission of SRS; And/or, retain SRS configuration; And/or, hang up TAT or stop TAT running.
Preferably, described Transmit-Receive Unit is further used for, when z duration after the accidental access response message Msg2 receiving described eNB transmission arrives, if this accidental access response message Msg2 is successfully decoded, indicate described updating block to change the descending timing reference carrier wave of described sTAG, wherein said z is the duration of accidental access response message Msg2 and described UE adjust duration needed for transmitting time point of eating dishes without rice or wine and value for described UE successfully decodes;
Described updating block, specifically for: the z duration after described Transmit-Receive Unit receives the accidental access response message Msg2 of described eNB transmission arrives, and described accidental access response message Msg2 is when being successfully decoded, change the descending timing reference carrier wave of described sTAG.
Preferably, described updating block is further used for, and during the new RA failure initiated in the community of the new RA of described initiation, does not upgrade the descending timing reference carrier wave of described sTAG.
Preferably, described updating block is further used for, and when determining the new RA failure that the community of the new RA of described initiation is initiated, confirms that described sTAG enters desynchronizing state.
Preferably, described updating block is further used for, and after the descending timing reference carrier wave of the described sTAG of renewal, carries out the maintenance process of the synchronous/asynchronous state of sTAG according to the sTAG descending timing reference carrier wave after renewal.
In the embodiment of the present invention, when the community that user terminal UE initiates Stochastic accessing in TAG changes, carry out in the process of RA, according to the descending timing reference carrier wave of the sTAG of the cell update UE of the new RA of described initiation in the community of initiating new RA; Therefore, the situation that technical solution of the present invention changes for the community of initiating random access procedure in TAG, provides in time, upgrades accurately the method for the sTAG of UE.
Accompanying drawing explanation
Fig. 1 is that in prior art, UE sends upstream data and the time relationship schematic diagram of downlink data receiving on descending sub frame i on sub-frame of uplink i;
Fig. 2 is the method flow diagram upgrading the descending timing reference carrier wave of sTAG in the embodiment of the present invention;
In the example one that Fig. 3 A provides for the embodiment of the present invention, in the successful situation of RA, one of corresponding synchronous/asynchronous state and the schematic diagram changing the descending timing reference carrier wave of sTAG;
In the example one that Fig. 3 B provides for the embodiment of the present invention, in the successful situation of RA, corresponding synchronous/asynchronous state and change the schematic diagram two of the descending timing reference carrier wave of sTAG;
In the example one that Fig. 3 C provides for the embodiment of the present invention, when RA failure, one of corresponding synchronous/asynchronous state and the schematic diagram changing the descending timing reference carrier wave of sTAG;
In the example one that Fig. 3 D provides for the embodiment of the present invention, when RA failure, corresponding synchronous/asynchronous state and change the schematic diagram two of the descending timing reference carrier wave of sTAG;
In the example two that Fig. 4 A provides for the embodiment of the present invention, in the successful situation of RA, one of corresponding synchronous/asynchronous state and the schematic diagram changing the descending timing reference carrier wave of sTAG;
In the example two that Fig. 4 B provides for the embodiment of the present invention, in the successful situation of RA, corresponding synchronous/asynchronous state and change the schematic diagram two of the descending timing reference carrier wave of sTAG;
In the example two that Fig. 4 C provides for the embodiment of the present invention, when RA failure, one of corresponding synchronous/asynchronous state and the schematic diagram changing the descending timing reference carrier wave of sTAG;
In the example two that Fig. 4 D provides for the embodiment of the present invention, when RA failure, corresponding synchronous/asynchronous state and change the schematic diagram two of the descending timing reference carrier wave of sTAG;
In the example three that Fig. 5 A provides for the embodiment of the present invention, in the successful situation of RA, corresponding synchronous/asynchronous state and change the schematic diagram of the descending timing reference carrier wave of sTAG;
In the example three that Fig. 5 B provides for the embodiment of the present invention, change one of schematic diagram of the descending timing reference carrier wave of sTAG when RA failure;
In the example three that Fig. 5 C provides for the embodiment of the present invention, change the schematic diagram two of the descending timing reference carrier wave of sTAG when RA failure;
Fig. 6 is one of structural representation of the device upgrading the descending timing reference carrier wave of sTAG in the embodiment of the present invention;
Fig. 7 is the structural representation two of the device upgrading the descending timing reference carrier wave of sTAG in the embodiment of the present invention;
Fig. 8 is the structural representation three of the device upgrading the descending timing reference carrier wave of sTAG in the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of method and the device that upgrade the descending timing reference carrier wave of sTAG, upgrades the descending timing reference carrier wave of sTAG corresponding to UE with in time, accurately.In the embodiment of the present invention, when the community that UE initiates RA in TAG changes, carry out in the process of new RA, according to the descending timing reference carrier wave of the sTAG of the cell update UE of the new RA of described initiation in the community of initiating new RA; Therefore, the situation that technical solution of the present invention changes for the community of initiating random access procedure in TAG, provides in time, upgrades accurately the method for the sTAG of UE.
Below in conjunction with Figure of description, technical solution of the present invention is described in detail.
See Fig. 2, for upgrading the method flow diagram of sTAG corresponding to UE in the embodiment of the present invention, comprising:
Step 201, UE judge whether the community of initiating Stochastic accessing in current TAG changes.
Step 202, UE, when the community of determining to initiate RA changes, carry out in the process of new RA in the community of initiating new RA, the descending timing reference carrier wave of the sTAG of UE according to the cell update of the new RA of described initiation.
The community of initiating new RA is being carried out in random access procedure, and first, UE receives the PDCCHorder comprising sTAG random accessing message Msg0 that eNB sends; Secondly, UE carries out in the community of the new RA of this initiation sending to eNB the message Msg1 carrying preamble code in the process of new RA; Finally, UE receives eNB and sends accidental access response message Msg2, and described accidental access response message Msg2 is used for determining that whether Stochastic accessing is successful.
In the embodiment of the present invention, in above-mentioned steps 202, the sTAG descending timing reference carrier wave upgrading described UE can adopt any one scheme following:
Scheme 1, UE upgrade the descending timing reference carrier wave of sTAG in the n+x moment, and wherein n is that UE eats dishes without rice or wine the moment of receiving package containing the PDCCHorder of sTAG random accessing message Msg0, and x is for UE is to the duration required for the PDCCHorder successfully decoded received.
Scheme 2, UE upgrade the descending timing reference carrier wave of sTAG in the m-y moment, and wherein m is the moment comprising the message Msg1 of preamble code that UE eats dishes without rice or wine to send to eNB, and y is UE adjusts required for up transmitting time point duration.
Scheme 3, UE upgrade the descending timing reference carrier wave of sTAG in the k+z moment, wherein k is that UE eats dishes without rice or wine moment of receipt message Msg2, the duration of z required for UE MESSAGE SUCCESSFULLY DECODED Msg2 and UE adjust the duration of eating dishes without rice or wine required for transmitting time point with value (being generally about 6ms).
Preferably, for such scheme 1 and scheme 2, in the embodiment of the present invention, UE is when determining the new RA failure that the community of the new RA of described initiation is initiated, do not upgrade the descending timing reference carrier wave of described sTAG, or think that described sTAG does not have corresponding descending timing reference carrier wave.
Preferably, for scheme 3, in the embodiment of the present invention, UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, does not upgrade the descending timing reference carrier wave of described sTAG; And/or during the new RA failure initiated in the community of the new RA of described initiation, UE confirms that described sTAG enters desynchronizing state.
Preferably, for such scheme 1 and scheme 2, after above-mentioned steps 202, also can comprise the following steps:
STAG, after UE upgrades the descending timing reference carrier wave of described sTAG, stops the transmission operation carrying out upstream data, until the new RA success that the community of the new RA of described initiation is initiated;
Described UE is after upgrading described sTAG descending timing reference carrier wave and before receiving new TA (TimingAdvance, timing advance) order, carry out following two states, and operate accordingly:
State 1, UE think that described sTAG is in desynchronizing state, and carry out following operation: the upstream data of stopping except preamble code and the transmission of SRS (SoundingReferenceSignal, detection reference signal); And/or, the SRS resource that notice RRC (RadioResourceControl, wireless heterogeneous networks) release is corresponding; And/or, stop TAT (TimeAlignmentTimmer, timing alignment timer) to run;
State 2, think that described sTAG is in non-synchronous regime, described non-synchronous regime refers to can not carry out UL transfer of data except preamble code (UL transfer of data refers to other upstream datas outside place preamble code and SRS transmission), TAT hangs up or TAT is out of service, retain the state of SRS configuration, and carries out following operation: the transmission stopping upstream data except preamble code and SRS; And/or, retain SRS configuration; And/or, hang up TAT or stop TAT running.
Preferably, in the embodiment of the present invention, in above-mentioned steps 203, UE, after the descending timing reference carrier wave of the described sTAG of renewal, also comprises: the maintenance process carrying out the synchronous/asynchronous state of sTAG according to the sTAG descending timing reference carrier wave after renewal.As follows particularly:
For scheme 1 and scheme 2, when initiating the new RA success of community of new RA, after the descending timing reference carrier wave of renewal sTAG, think that sTAG is in uplink loss state (i.e. Out-Sync state), the transmission of upstream data can not be carried out, until this time random access procedure successfully returns the transmission that synchronous regime (i.e. In-Sync state) Shi Caineng carries out upstream data; When initiating the new RA procedure failure of community of new RA, then think that sTAG enters desynchronizing state, can not transmitting uplink data be carried out;
For scheme 3, when initiating the new RA success of community of new RA, after the descending timing reference carrier wave of renewal sTAG, owing to having carried the TA order of the community of the new RA of described initiation in message Msg2, therefore, sTAG is still in uplink sync status, and UE can carry out the transmission of upstream data; When initiating the new RA failure of community of new RA, can think that the synchronous/asynchronous state of sTAG is reset condition (i.e. original state), can also think that sTAG enters desynchronizing state.
For being more clearly and detailedly described in detail technical solution of the present invention, in the embodiment of the present invention, the scheme of the sTAG of UE is upgraded for above-mentioned three kinds, the embodiment of the present invention is described in detail with three concrete examples, the wherein corresponding scheme 1 of example one, the corresponding scheme 2 of example two, the corresponding scheme 3 of example three.
Example one
Rel-11SCellRA process is triggered by eNB, when UE receives the random accessing message Msg0 of eNB transmission, represents the beginning of random access procedure; UE, after successfully decoding comprises the PDCCHorder of sTAG random accessing message Msg0, upgrades the descending timing reference carrier wave of sTAG.
Suppose that CAUE has been polymerized 4 communities (be respectively PCell, SCell1, SCell2 and SCell3, wherein PCell is main plot, and SCell1 ~ SCell3 is assisted cell); According to TA value, PCell and SCell1 belongs to PCellTAG, SCell2 and SCell3 belongs to SCellTAG.If SCell2 initiates the community of RA before being sTAG, then SCell2 is the current descending timing reference carrier wave of this sTAG.If UE is in uplink sync status on SCell2/SCell3, then UE can carry out transmitting uplink data on SCell2/SCell3, and the timing of its transmitting uplink data is: on the basis of the descending timing reference of SCell2, shift to an earlier date (N
tA+ N
tAoffset) × T
ssecond, wherein 0≤N
tA≤ 20512, for FDD, N
tAoffset=0, for TDD, N
tAoffset=624.
If when eNB triggers SCell3 (namely initiating the community of new RA) initiating random access procedure, UE is, when this sTAG triggers, instruction SCell3 initiates the PDCCHorder of the random accessing message Msg0 of RA, descending for current sTAG timing reference carrier wave is changed to SCell3 at this eNB that successfully decodes; Detailed process is as follows: if eat dishes without rice or wine receive PDCCHorder at moment n, and the duration successfully decoded required for PDCCHorder in UE side is x, then descending for current sTAG timing reference carrier wave is changed to SCell3 in (n+x) moment by UE.After the descending timing reference carrier wave of this sTAG changes to SCell3, when UE sends Msg1 on SCell3, determine that UE sends the concrete time point of Msg1 based on the descending timing of SCell3 and timing relationship as shown in Figure 1.STAG for SCell2, SCell3 place changes due to the descending timing reference carrier wave of sTAG, and therefore before receiving new TA command word, sTAG stops the transmission carrying out upstream data, until the new RA success that the community of initiating new RA is initiated.UE from after renewal sTAG descending timing reference carrier wave to before receiving new TA command word, UE can be in following two states:
State 1, desynchronizing state as shown in Figure 3A; Now UE can carry out following any one or multiple operation: operation 1, stop the transmission of upstream data except preamble code and SRS; The SRS resource of operation 2, notice RRC release correspondence; Operation 3, stopping TAT running.
State 2, non-synchronous regime (i.e. newstate) as shown in Figure 3 B, now UE can carry out following any one or multiple operation: operation 1, stop the transmission of upstream data except preamble code and SRS; Operation 2, reservation SRS configuration; Operation 3, hang-up TAT or stopping TAT running.
Above-mentioned state 1 and state 2 are that the new RA success initiated based on SCell3 obtains; If during the new RA failure that SCell3 initiates, the sTAG at SCell2 and SCell3 place can be in the state as shown in Fig. 3 C or Fig. 3 D.
Example two
The a certain SCell of UE in sTAG is in the process of carrying out RA, and UE should be the descending carrier of the SIB2-linkage sending RA to the descending timing reference carrier wave that eNB sends Preamble code.For the lot of complexity avoiding descending timing reference frequent transitions to cause UE process, when UE can send preamble code in the process that SCell carries out RA, change the descending timing reference carrier wave of sTAG.
Suppose that CAUE has been polymerized 4 communities (be respectively PCell, SCell1, SCell2 and SCell3, wherein PCell is main plot, and SCell1 ~ SCell3 is assisted cell); According to TA value, PCell and SCell1 belongs to PCellTAG, SCell2 and SCell3 belongs to SCellTAG.If SCell2 initiates the community of RA before being sTAG, then SCell2 is the current descending timing reference carrier wave of this sTAG.If UE is in uplink sync status on SCell2/SCell3, then UE carries out transmitting uplink data on SCell2/SCell3, and the timing of its transmitting uplink data is: on the basis of the descending timing reference of SCell2, shift to an earlier date (N
tA+ N
tAoffset) × T
ssecond, wherein 0≤N
tA≤ 20512, for FDD, N
tAoffset=0, for TDD, N
tAoffset=624.
If when eNB triggers SCell3 initiating random access procedure, suppose that UE adjusts up transmitting time point required that duration is y, then descending for current sTAG timing reference carrier wave is changed to SCell3 in the m-y moment by UE in the RA process of SCell3, and wherein m is that UE eats dishes without rice or wine to send the message Msg1 moment comprising preamble code.UE successfully decode PDCCHorder to send message Msg1 during this period of time in, the descending timing reference carrier wave of sTAG is still SCell2; Now, during this period of time, if TA does not have time-out, then UE also can on SCell2 normal transmit ascending data.After descending for sTAG timing reference carrier wave being changed to SCell3 when sending message Msg1, sTAG stops the transmission of upstream data, until the new RA success that the community of initiating new RA is initiated.UE from after renewal sTAG descending timing reference carrier wave to before receiving new TA command word, UE can be in following two states:
State 1, desynchronizing state as shown in Figure 4 A; Now UE can carry out following any one or multiple operation: operation 1, stop the transmission of upstream data except preamble code and SRS; The SRS resource of operation 2, notice RRC release correspondence; Operation 3, stopping TAT running.
State 2, non-synchronous regime as shown in Figure 4 B, now UE can carry out following any one or multiple operation: operation 1, stop the transmission of upstream data except preamble code and SRS; Operation 2, reservation SRS configuration; Operation 3, hang-up TAT or stopping TAT running.
Above-mentioned state 1 and state 2 are that the new RA success initiated based on SCell3 obtains; If during the new RA failure that SCell3 initiates, the sTAG at SCell2 and SCell3 place can be in the state as shown in Fig. 4 C or Fig. 4 D.
Example three
UE receive eNB send for characterizing RA response message Msg2 time, the descending timing reference carrier wave of sTAG can be changed.The concrete form of message Msg2 is complete accidental access response message (RAR, or independent TA order media access control layer control unit (TACMACCE RandomAccessResponse), TimeAlignmentCommandMediaAccessControlControlElement), depend on that eNB sends the concrete mode of message Msg2.Due to the decoding delay of Layer1 and Layer2, and UE adjusts the duration of eating dishes without rice or wine needed for transmitting time point, if therefore UE eats dishes without rice or wine to receive the moment of message Msg2 when being k, then UE changes the descending timing reference carrier wave of sTAG in the k+z moment, wherein k is the moment that UE receives message Msg2, z for UE complete to Msg2 successfully decode required duration and transmitting time point adjustment process required for duration and value.
Suppose that CAUE has been polymerized 4 communities (be respectively PCell, SCell1, SCell2 and SCell3, wherein PCell is main plot, and SCell1 ~ SCell3 is assisted cell); According to TA value, PCell and SCell1 belongs to PCellTAG, SCell2 and SCell3 belongs to SCellTAG.If SCell2 initiates the community of RA before being sTAG, then SCell2 is the current descending timing reference carrier wave of this sTAG.If UE is in uplink sync status on SCell2/SCell3, then UE can carry out transmitting uplink data on SCell2/SCell3, and the timing of its transmitting uplink data is: on the basis of the descending timing reference of SCell2, shift to an earlier date (N
tA+ N
tAoffset) × T
ssecond, wherein 0≤N
tA≤ 20512, for FDD, N
tAoffset=0, for TDD, N
tAoffset=624.If when carrying the TA command word for SCell3 in message Msg2, and message Msg2 is successfully decoded by UE, UE is still in uplink sync status.If SCell3RA failure, then the descending timing reference carrier wave that the sTAG at SCell2, SCell3 place is corresponding does not change, and the synchronous/asynchronous state of sTAG is that original state or sTAG enter desynchronizing state.Be as shown in Figure 5A in the successful situation of RA, the schematic diagram of corresponding synchronous/asynchronous state and the descending timing reference carrier wave of change sTAG; As shown in Figure 5 B for when RA is failed and sTAG enters Original state, change the schematic diagram of the descending timing reference carrier wave of sTAG; If Fig. 5 C is when RA is failed and sTAG enters desynchronizing state, change the schematic diagram of the descending timing reference carrier wave of sTAG.
Based on the design that preceding method flow process is identical, the embodiment of the present invention also provides a kind of device upgrading the descending timing reference carrier wave of sTAG, and the structure of this device as shown in Figure 6, comprising:
Determining unit 61, for determining whether the community of initiating random access procedure RA in current TAG changes;
Updating block 62, when the community for determining to initiate RA in described determining unit 61 changes, carries out in the process of new RA in the community of initiating new RA, the descending timing reference carrier wave of the sTAG of UE according to the cell update of the new RA of described initiation.
Preferably, said apparatus also can comprise Transmit-Receive Unit 63, as shown in Figure 7:
Transmit-Receive Unit 63, receives the PDCCHorder comprising random accessing message Msg0 that eNB sends for eating dishes without rice or wine; And, send to described eNB the Msg1 message including Stochastic accessing preamble code for eating dishes without rice or wine; And, receive for eating dishes without rice or wine described eNB send for accidental access response message Msg2.
Preferably, Transmit-Receive Unit 63 is further used for, and after receiving described PDCCHorder, and when successfully decoding to described PDCCHorder, starts described updating block 62 and upgrades the descending timing reference carrier wave of described sTAG;
Described updating block 62, specifically for: when described Transmit-Receive Unit 63 is successfully decoded to described PDCCHorder, upgrade the descending timing reference carrier wave of described sTAG.
Preferably, Transmit-Receive Unit 63 is further used for, when sending the x duration included before the message Msg1 of Stochastic accessing preamble code to described eNB and arriving, indicate described updating block 62 to change the descending timing reference carrier wave of described sTAG, wherein said x adjusts the duration required for up transmitting time point for described UE;
Described updating block 62, specifically for: when described Transmit-Receive Unit 63 sends to described eNB the x duration arrival included before the message Msg1 of Stochastic accessing preamble code, change the descending timing reference carrier wave of described sTAG.
Preferably, described updating block 62 is further used for, and when the new RA failure of the community of the new RA of described initiation, does not upgrade the descending timing reference carrier wave of described sTAG, or confirms that described sTAG does not have corresponding descending timing reference carrier wave.
Preferably, in the device described in above-mentioned Fig. 6 or Fig. 7, also can comprise processing unit 64, be illustrated in figure 8 and be also provided with processing unit 64 in the device shown in Fig. 7, wherein:
Processing unit 64, for after upgrading described sTAG descending timing reference carrier wave at described updating block 62 and before described Transmit-Receive Unit 63 receives new timing alignment TA order, think that sTAG is in desynchronizing state, and carry out following operation: the upstream data of stopping except preamble code and the transmission of SRS; And/or, the SRS resource that notice RRC release is corresponding; And/or, stop TAT running;
Or, described processing unit 64, for after upgrading described sTAG descending timing reference carrier wave at described updating block 62 and before described Transmit-Receive Unit 63 receives new TA order, think that described sTAG is in non-synchronous regime, described non-synchronous regime refers to the UL transfer of data can not carried out except preamble code, the state that TAT hangs up or TAT is out of service, reservation SRS configures, and carries out following operation: the upstream data of stopping except preamble and the transmission of SRS; And/or, retain SRS configuration; And/or, hang up TAT or stop TAT running.
Preferably, Transmit-Receive Unit 63 is further used for, when z duration after the accidental access response message Msg2 receiving described eNB transmission arrives, if this accidental access response message Msg2 is successfully decoded, described updating block 62 is indicated to change the descending timing reference carrier wave of described sTAG, the duration that wherein said z is described UE MESSAGE SUCCESSFULLY DECODED Msg2 and described UE adjust duration needed for transmitting time point of eating dishes without rice or wine and value;
Described updating block 62, specifically for: when the z duration after described Transmit-Receive Unit 63 receives the accidental access response message Msg2 of described eNB transmission arrives, change the descending timing reference carrier wave of described sTAG.
Preferably, described updating block 62 is further used for, and when the new RA failure of the community of the new RA of described initiation, does not upgrade the descending timing reference carrier wave of described sTAG.
Preferably, updating block 62 is further used for, and when the new RA failure of community determining the new RA of described initiation, confirms that described sTAG enters desynchronizing state.
Preferably, updating block 62 is further used for, and after the descending timing reference carrier wave of the described sTAG of renewal, carries out the maintenance process of the synchronous/asynchronous state of sTAG according to the sTAG descending timing reference carrier wave after renewal; Specifically can as previously mentioned, not repeat them here.
In the embodiment of the present invention, on the one hand, when the community that UE initiates Stochastic accessing in TAG changes, carry out in the process of new RA, according to the descending timing reference carrier wave of the sTAG of the cell update UE of the new RA of described initiation in the community of initiating new RA; Therefore, the situation that technical solution of the present invention changes for the community of initiating random access procedure in TAG, provides in time, upgrades accurately the method for the sTAG of UE; On the other hand, in the embodiment of the present invention, how sTAG is upgraded for UE, provide three kinds of schemes, therefore, adopt technical solution of the present invention can also choose according to the application scenarios of reality the renewal that comparatively suitable scheme carries out sTAG, therefore, it is possible to further guarantee the accuracy upgraded sTAG.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if belong within the scope of the claims in the present invention and equivalent technologies thereof to these amendments of the present invention and modification, then the present invention is also intended to comprise these change and modification.
Claims (17)
1. upgrade a method for the descending timing reference carrier wave of assisted cell timing alignment group sTAG, it is characterized in that, comprising:
User terminal UE determines whether the community of initiating random access procedure RA in current timing alignment group TAG changes;
UE, when the community of determining to initiate RA changes, carries out in the process of new RA in the community of initiating new RA, the descending timing reference carrier wave of the sTAG of UE according to the cell update of the new RA of described initiation;
The maintenance process of the synchronous/asynchronous state of sTAG is carried out according to the sTAG descending timing reference carrier wave after renewal.
2. the method for claim 1, is characterized in that, the descending timing reference carrier wave of sTAG of the described UE of described renewal, comprising:
Described UE eat dishes without rice or wine to receive the base station eNB of evolution sends comprise the physical downlink control channel commands PDCCHorder of random accessing message Msg0 after, and when described PDCCHorder is successfully decoded, change the descending timing reference carrier wave of described sTAG.
3. the method for claim 1, is characterized in that, the descending timing reference carrier wave of sTAG of the described UE of described renewal, comprising:
Described UE eat dishes without rice or wine to the base station eNB of evolution send include x duration before the message Msg1 of Stochastic accessing preamble code arrive time, change the descending timing reference carrier wave of described sTAG, wherein said x adjusts the duration required for up transmitting time point for described UE.
4. method as claimed in claim 2 or claim 3, is characterized in that, also comprise:
Described UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, does not upgrade the descending timing reference carrier wave of described sTAG, or confirms that described sTAG does not have corresponding descending timing reference carrier wave.
5. method as claimed in claim 2 or claim 3, is characterized in that, also comprise:
STAG, after the descending timing reference carrier wave of the described sTAG of renewal, stops the transmission operation carrying out upstream data, until the new RA success that the community of the new RA of described initiation is initiated;
Described UE is after the described sTAG of renewal descending timing reference carrier wave and before receiving new timing advance TA order, think that sTAG is in desynchronizing state, and carry out following operation: the upstream data of stopping except preamble code and the transmission of detection reference signal SRS; And/or, the SRS resource that the release of notice radio resource control RRC is corresponding; And/or, stop timing alignment timer TAT to run;
Or, described UE is after the described sTAG of renewal descending timing reference carrier wave and before receiving new TA order, think that described sTAG is in non-synchronous regime, described non-synchronous regime refers to the transmitting uplink data can not carried out except preamble code, the state that TAT hangs up or TAT is out of service, reservation SRS configures, and carries out following operation: the upstream data of stopping except preamble code and the transmission of SRS; And/or, retain SRS configuration; And/or, hang up TAT or stop TAT running.
6. the method for claim 1, is characterized in that, the descending timing reference carrier wave of sTAG of the described UE of described renewal, comprising:
When z duration after the accidental access response message Msg2 that the base station eNB that described UE eats dishes without rice or wine to receive evolution sends arrives, if accidental access response message Msg2 is successfully decoded, change the descending timing reference carrier wave of described sTAG, wherein said z is the duration of accidental access response message Msg2 and described UE adjust duration needed for transmitting time point of eating dishes without rice or wine and value for described UE successfully decodes.
7. method as claimed in claim 6, is characterized in that, also comprise:
Described UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, does not upgrade the descending timing reference carrier wave of described sTAG.
8. method as claimed in claims 6 or 7, is characterized in that, also comprise:
Described UE, when determining the new RA failure that the community of the new RA of described initiation is initiated, confirms that described sTAG enters desynchronizing state.
9. upgrade a device for the descending timing reference carrier wave of assisted cell timing alignment group sTAG, it is characterized in that, comprising:
Determining unit, for determining whether the community of initiating random access procedure RA in current timing alignment group TAG changes;
Updating block, when the community for determining to initiate RA in described determining unit changes, carries out in the process of new RA, according to the descending timing reference carrier wave of sTAG of the cell update user terminal UE of the new RA of described initiation in the community of initiating new RA; The maintenance process of the synchronous/asynchronous state of sTAG is carried out according to the sTAG descending timing reference carrier wave after renewal.
10. device as claimed in claim 9, is characterized in that, also comprise:
Transmit-Receive Unit, the physical downlink control channel commands PDCCHorder comprising random accessing message Msg0 that the base station eNB receiving evolution for eating dishes without rice or wine sends; And, send to described eNB the message Msg1 including Stochastic accessing preamble code for eating dishes without rice or wine; And, the accidental access response message Msg2 that described eNB sends is received for eating dishes without rice or wine.
11. devices as claimed in claim 10, it is characterized in that, described Transmit-Receive Unit is further used for, after receiving described PDCCHorder, and when described PDCCHorder is successfully decoded, start described updating block and upgrade the descending timing reference carrier wave of described sTAG;
Described updating block, specifically for: when described Transmit-Receive Unit is successfully decoded to described PDCCHorder, upgrade the descending timing reference carrier wave of described sTAG.
12. devices as claimed in claim 10, it is characterized in that, described Transmit-Receive Unit is further used for, when sending the x duration included before the message Msg1 of Stochastic accessing preamble code to described eNB and arriving, indicate described updating block to change the descending timing reference carrier wave of described sTAG, wherein said x adjusts the duration required for up transmitting time point for described UE;
Described updating block, specifically for: when described Transmit-Receive Unit sends to described eNB the x duration arrival included before the message Msg1 of Stochastic accessing preamble code, change the descending timing reference carrier wave of described sTAG.
13. devices as described in claim 11 or 12, it is characterized in that, described updating block is further used for, during the new RA failure initiated in the community of the new RA of described initiation, do not upgrade the descending timing reference carrier wave of described sTAG, or confirm that described sTAG does not have corresponding descending timing reference carrier wave.
14. devices as described in claim 11 or 12, is characterized in that, also comprise:
Processing unit, for after upgrade described sTAG descending timing reference carrier wave at described updating block and before described Transmit-Receive Unit receives new timing advance TA order, think that sTAG is in desynchronizing state, and carry out following operation: the upstream data of stopping except preamble code and the transmission of detection reference signal SRS; And/or, the SRS resource that the release of notice radio resource control RRC is corresponding; And/or, stop timing alignment timer TAT to run;
Or, described processing unit, for after upgrade described sTAG descending timing reference carrier wave at described updating block and before described Transmit-Receive Unit receives new TA order, think that described sTAG is in non-synchronous regime, described non-synchronous regime refers to the transmitting uplink data can not carried out except preamble code, the state that TAT hangs up or TAT is out of service, reservation SRS configures, and carries out following operation: the upstream data of stopping except preamble and the transmission of SRS; And/or, retain SRS configuration; And/or, hang up TAT or stop TAT running.
15. devices as claimed in claim 10, it is characterized in that, described Transmit-Receive Unit is further used for, when z duration after the accidental access response message Msg2 receiving described eNB transmission arrives, if accidental access response message Msg2 is successfully decoded, indicate described updating block to change the descending timing reference carrier wave of described sTAG, wherein said z is the duration of accidental access response message Msg2 and described UE adjust duration needed for transmitting time point of eating dishes without rice or wine and value for described UE successfully decodes;
Described updating block, specifically for: the z duration after described Transmit-Receive Unit receives the accidental access response message Msg2 of described eNB transmission arrives, and described accidental access response message Msg2 is when being successfully decoded, change the descending timing reference carrier wave of described sTAG.
16. devices as claimed in claim 15, it is characterized in that, described updating block is further used for, and during the new RA failure initiated in the community of the new RA of described initiation, does not upgrade the descending timing reference carrier wave of described sTAG.
17. devices as described in claim 15 or 16, it is characterized in that, described updating block is further used for, and when determining the new RA failure that the community of the new RA of described initiation is initiated, confirms that described sTAG enters desynchronizing state.
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