CN102281626A - Method and device for determining uplink timing advance - Google Patents
Method and device for determining uplink timing advance Download PDFInfo
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- CN102281626A CN102281626A CN2011101880240A CN201110188024A CN102281626A CN 102281626 A CN102281626 A CN 102281626A CN 2011101880240 A CN2011101880240 A CN 2011101880240A CN 201110188024 A CN201110188024 A CN 201110188024A CN 102281626 A CN102281626 A CN 102281626A
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Abstract
The invention discloses a method and a device for determining uplink timing advance, which are used for enabling UE to be capable of determining the uplink timing advance necessary for practical uplink data transmission. The method for determining the uplink timing advance comprises the following step of: determining the uplink TA (Timing Advance) necessary for the current uplink data transmission according to uplink synchronization conditions a current SCell TA Group.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of up Timing Advance (Timing Advance, TA) definite method and device.
Background technology
For supporting that (up-link carrier of a plurality of sub-districts correspondence of terminal polymerization has different up TA to carrier aggregation for Carrier Aggregation, system CA).
(LTE Advanced, LTE-A) peak rate of system improves a lot than Long Term Evolution (LTE) system advanced Long Term Evolution, requires to reach descending 1Gbps, up 500Mbps.Simultaneously, there are good compatibility in LTE-A system requirements and LTE system.Based on improve peak rate, with LTE system compatible and the needs that make full use of frequency spectrum resource, the LTE-A system has introduced the CA technology.
Carrier aggregation technology is meant that a plurality of cell can provide the mechanism of data transport service simultaneously for UE in subscriber equipment (UE) a plurality of sub-districts of polymerization (cell) simultaneously.The carrier wave of each cell correspondence can be continuous or discrete at frequency domain in the system of carrier aggregation, for the LTE system compatible, the maximum bandwidth of each member carrier is 20MHz, the bandwidth between each member carrier can be identical or different.
Under the carrier aggregation, terminal works divide into a main plot (Primary Cell for a short time, PCell) and several auxilliary sub-districts (SCell), the work of most of control and signaling has been born in the main plot, as sending up feedback, channel quality indication (Channel Quality Indicator to downlink data, CQI) report, ascending pilot frequency transmission etc., auxilliary sub-district mainly is as resource, bears the function of transfer of data.
Access at random in the LTE system is divided into and non-competingly inserts at random and compete and insert two kinds at random.
The non-competing process that inserts at random is illustrated in fig. 1 shown below, and mainly is divided into for three steps:
Msg0: the base station is used in non-competing special-purpose random access lead code (the Random Acelless Preamble that inserts at random to the UE branch, ra-PreambleIndex) and at random insert Packet Random Access Channel (the Packet Random Access CHannel that uses, PRACH) resource (ra-PRACH-MaskIndex) (PRACH Mask Index, PRACH Mask numbering): arrive non-competing the access at random that causes for downlink data and use Physical Downlink Control Channel (PDCCH) to carry these information, carry these information for non-competing the access at random that switching causes by the RRC signaling.
Msg1:UE sends the dedicated preamble (preamble) of appointment according to the ra-PreambleIndex and the ra-PRACH-MaskIndex of Msg0 indication to the base station on the PRACH of appointment resource.Up timing advance TA is calculated according to Msg1 after receiving Msg1 in the base station.
Msg2: the base station sends accidental access response to UE, comprises Timing Advance information and follow-up uplink transmission resource in the accidental access response and distributes (UL grant), and Timing Advance is used for the timing relationship of the follow-up uplink of UE.PDCCH random access radio network temporary mark (the Random Access Radio Network Temporary Identifier of carrying Msg2 scheduling message, RA-RNTI) scrambling, RA-RNTI is unique corresponding with the running time-frequency resource that sends Msg1 in the 10ms window; Also carry preamble sign (ID) in addition among the Msg2, UE determines that by RA-RNTI and preamble ID this Msg2 is corresponding with the Msg1 of its transmission.
The process that competition inserts at random is illustrated in fig. 2 shown below, and mainly is divided into for four steps:
Msg1:UE selects to insert preamble and PRACH resource at random, and utilizes this PRACH resource to send the selected preamble that inserts at random to the base station;
Msg2: the base station receives preamble, calculates timing advance TA, and sends accidental access response to UE, comprises this Timing Advance information in the accidental access response at least and at the UL grant of Msg3;
Msg3:UE sends uplink on the UL of Msg2 appointment grant, different random inserts the content difference of reason Msg3 uplink, such as for initial access, the Msg3 transmission be that (Radio Resource Control RRC) connects the request of foundation in Radio Resource control;
Msg4: competition solves message.
UE can judge according to Msg4 whether access at random is successful.
No matter compete and insert at random or non-competing access at random, the Msg1 delivery time all needs the downlink radio frame starting point with reference to certain sub-district, as shown in Figure 3, terminal is determined after the starting point of certain cell downlink radio frames i, to be reference with this starting point, the Msg1 delivery time is done certain adjustment according to Timing Advance, and the timing advance adjustment amount of Msg1 is (N
TA+ N
TA offset) * T
s, wherein, Ts is the basic time unit of LTE, size is (10ms/307200), N
TABe the timing advance adjustment amount, for inserting Msg1, N at random
TAValue is 0; N
TA offsetBe a side-play amount, relevant with duplex mechanism, for Frequency Division Duplexing (FDD) (Frequency Division Duplex, FDD), its value gets 0, (Time Division Duplex, TDD) its value is got N for time division duplex
TA offset=624.
For version 10 (R10) owing to do not support many TA (Multi-TA), therefore only insert at random and need on PCell, initiate, so the up Timing Advance of terminal to obtain be that descending carrier with PCell is as timing reference.
Because may there be different communication environments (for example, different frequencies, or network side location altogether) in the introducing of multi-carrier polymerizing, different carrier, different up Timing Advances may occur for different carrier waves.
Present third generation collaborative project (3rd Generation Partnership Project, 3GPP) two kinds of scenes of supporting multi-TA of definition:
Scene 1: as shown in Figure 4, introduced the scene of Remote Radio Unit (RRU).
Such as: frequency 1 (F1) provides on a large scale and covers, and antenna is zoomed out in frequency 2 (F2) use, and (Remote Radio Head RRH) is used for the interior focus of F1 cell and covers, and mobile management is carried out based on F1.If UE is positioned at RRH cell and the equitant zone of F1 cell of F2 under this scene, F1 cell and F2 cell can polymerizations, but up (UL) TA of F1 cell and F2 cell is different.
Scene 2: as shown in Figure 5, introduce the scene of repeater (repeater).
Such as: F1 and F2 are supported in the base station, F1 provides on a large scale and covers, the F2 coverage is less, by frequency selectivity repeater, coverage that can spread F 2, if UE is positioned at F1 cell and the equitant zone of F2 cell under this scene, F1 cell and F2 cell can polymerizations, but the UL TA of F1 cell and F2 cell may be different.
Safeguard for the ease of TA the Multi-TA system, introduced the notion of TA group (group), belong to its UL member carrier of cell (Component Carrier of same TA group, CC) can use identical TA value, the TA of its UL CC of cell that belongs to different TA group is inequality.UE only needs to keep uplink synchronous with a sub-district in a TA group, has just realized the uplink synchronous to all sub-districts in the TA group.
The uplink synchronous process is used to keep the uplink synchronous of terminal and base station, is convenient to terminal and carries out transmitting uplink data and downlink data is sent mixing retransmitting (HARQ, Hybrid-ARQ) feedback information automatically.
In the LTE system, regulation is by the base station maintenance uplink synchronous.When UE inserts at random, the base station obtains initial Timing Advance according to preamble, follow-up uplink synchronous maintenance process as shown in Figure 6, base station and UE safeguard a upstream synchronous timing device (TA timer respectively, TAT), the base station sends TA order (command to terminal, cmd) and start TAT, if terminal can not correctly receive TAcommand, then the base station after a while T1 resend TA cmd and restart TAT, terminal correctly receives the TAT that TA command then starts the TAT of terminal and send to confirm to restart after (ACK) information, base station receive the ACK information that terminal sends the base station to the base station.The base station does not have overtime at the TAT of certain UE, then the base station thinks that this UE is in synchronous regime; As long as it is overtime that the TAT that UE oneself safeguards does not have, then UE also thinks it oneself is synchronous.
Because the signal propagation condition on a plurality of services (serving) cell of being connected with eNB of CA UE is different, so can cause up time difference and descending time difference difference to some extent.If the upward signal of same cells and downstream signal communication environments are basic identical, then UE can according to the timing situation of the downstream signal that receives calculate voluntarily up Timing Advance (Timing Advance, TA).
The use of this method is assumed to be UE and has disposed 1 PCell and 1 SCell as shown in Figure 7, and wherein PCell belongs to different TAGroup respectively with SCell, and relevant parameter is described as follows:
| Parameter | Explanation |
| Tdtp | Network side sends the time point of eating dishes without rice or wine of downlink data at PCell |
| Tdrp | UE is at the time point of eating dishes without rice or wine of PCell downlink data receiving |
| Tutp | UE sends the time point of upstream data at PCell |
| TAp | TA value on the PCell |
| Tdts | Network side sends the time point of eating dishes without rice or wine of downlink data at SCell |
| Tdrs | UE is at the time point of eating dishes without rice or wine of SCell downlink data receiving |
| Tuts | UE sends the time point of upstream data at SCell |
| TAs | TA value on the SCell |
Table one
Wherein, the TA value on the last and SCell of PCell can calculate by following formula:
TA
P＝T
DRP-T
UTP＝2*(T
DRP-T
DTP)
TA
S＝T
DRS-T
UTS＝2*(T
DRS-T
DTS)
Wherein, TA
PTA value on the expression PCell, TA
STA value on the expression SCell.
From the top derivation of equation, can be directly obtain TA value on the SCell by the TA value on the PCell:
TA
S＝TA
P-2*[(T
DRP-T
DRS)-(T
DTP-T
DTS)]
Because current UE promptly depends primarily on UE and realizes the not strict requirement of the timing of downstream signal, therefore, for UE know voluntarily on PCell and the SCell descending (DL) regularly (Timing) difference can not guarantee very accurate.Because the uplink synchronous between UE and the network is divided into two kinds, a kind of is synchronously preliminary, promptly by Random Access Channel (Random Access Channel, RACH) process obtains absolute new TA (Nta) value, another kind is to adjust relatively synchronously, be that eNB passes through regularly to adjust order medium access controls (MAC) control units (Timing Advance Command MAC Control Element, TAC MAC CE) mode and notifies the adjusted value of the relative Nta of UE.Because it is not high relatively that preliminary synchronous synchronization accuracy requires, so this method can replace the preliminary synchronous situation of RACH process acquisition.
In sum, automatically count the mode of the TA value (Value) on the capable SCell TA Group in according to descending timing ga(u)ge if consider UE, the up Timing Advance of considering when then UE sends upstream data has two kinds of methods, be that UE calculates up Timing Advance (TA) on the SCell TA Group according to descending timing difference automatically, and the UE up Timing Advance (TA) that directly adopts network side to provide by TAC MAC CE.But the TA information which kind of method when UE adopt provide is not still not discussed and regulation at present, and therefore UE can't determine the up Timing Advance of required use in the transmitting uplink data in actual applications.
Summary of the invention
The embodiment of the invention provides a kind of up timing advance method for determination of amount and device, uses so that UE can determine the up Timing Advance of required use in the transmitting uplink data of reality.
Definite method of a kind of up timing advance TA that the embodiment of the invention provides comprises:
Determine the uplink synchronous situation of current auxilliary sub-district TA group SCell TA Group;
According to the uplink synchronous situation of current SCell TA Group, determine the up TA of the required employing of current transmitting uplink data.
Definite device of a kind of up timing advance TA that the embodiment of the invention provides comprises:
Uplink synchronous situation judging unit is used for determining that current auxilliary sub-district TA organizes the uplink synchronous situation of SCell TA Group;
Determining unit is used for the uplink synchronous situation according to current SCell TA Group, determines the up TA of the required employing of current transmitting uplink data.
In the embodiment of the invention, determine the uplink synchronous situation of current auxilliary sub-district TA group SCell TA Group; According to the uplink synchronous situation of current SCell TA Group, determine the up TA of the required employing of current transmitting uplink data, thereby make UE can determine the up Timing Advance of required use in the transmitting uplink data of reality.
Description of drawings
Fig. 1 is non-competing random access procedure schematic diagram;
Fig. 2 is competition random access procedure schematic diagram;
Fig. 3 is for sending the timing advance reference view;
Fig. 4 is for having introduced the scene schematic diagram of Remote Radio Unit (RRU);
Fig. 5 is for introducing the scene schematic diagram of repeater (repeater);
Fig. 6 is a uplink synchronous maintenance process schematic diagram;
Fig. 7 is the timing relationship schematic diagram between PCell and the SCell;
The overall procedure schematic diagram of a kind of up timing advance method for determination of amount that Fig. 8 provides for the embodiment of the invention;
The structural representation of definite device of a kind of up Timing Advance that Fig. 9 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of up timing advance method for determination of amount and device, uses so that UE can determine the up Timing Advance of required use in the transmitting uplink data of reality.
In the embodiment of the invention, when transmitting uplink data, according to the uplink synchronous situation among the current SCell TA Group, determine to adopt different TA Value acquisition methods: just subsynchronous if current this SCell TA Group need do, then UE calculates up TA or adopts random access procedure to obtain up TA information according to descending timing difference automatically; Under other situations, UE directly adopts the TA value of current reservation and the TA value of upgrading according to the TAC that network side is notified.
Particularly:
UE determines that current SCell TA Group is first subsynchronous situation, comprises following several mode:
Mode one: the synchronous desynchronizing state of SCell TA Group is a desynchronizing state.
The method of synchronization that transmitting uplink data first after the step-out on this SCell TA Group adopts is the first method of synchronization;
Wherein, the synchronous desynchronizing state of SCell TA Group is a desynchronizing state, refers to that the TA Timer according to UE carries out synchronous desynchronizing state maintenance on the SCell TA Group, after TA Timer does not start or be overtime, then think this SCell TA Group step-out, its synchronous desynchronizing state is a desynchronizing state;
Transmitting uplink data refers to the transmitting uplink data when UE receives at the uplink authorization first (UL Grant) on this SCell TA Group first.
Mode two: all SCell or the SCell uplink that comprise among the SCell TA Group all are in deactivation status.
At this moment, need certain SCell (or activating the SCell uplink) on this SCell TA Group of initial activation also to carry out the uplink on this SCell first;
Wherein, transmitting uplink data refers to corresponding transmission and the autonomous transmitting uplink data (i.e.SRS transmission) of UE of uplink authorization first (UL Grant) on the SCell first.
Mode three: network side adopts the first method of synchronization by explicit signaling notice UE in the transmitting uplink data of correspondence;
Wherein, described explicit signaling can be RRC, MAC or PDCCH signaling; If RRC or MAC signaling, then Dui Ying indication UE adopts the preliminary method of synchronization in the follow-up first time in the transmitting uplink data; If the PDCCH signaling, indication UE that can be corresponding adopts the preliminary method of synchronization in the UL Transmission of this PDCCH indication, also can indicate this PDCCH recent transmitting uplink data afterwards to adopt the preliminary method of synchronization.
UE preserves new TA (Nta) value with the first method of synchronization (UE obtains the mode of TA automatically according to descending timing difference) acquisition on this SCell TA Group, when having TAC MAC CE, network side adjusts the TA value of this SCell TA Group, then adjust, obtain new Nta value based on this Nta value; UE is in transmitting uplink data, directly with the Timing Advance of Nta value as transmitting uplink data;
In addition, in the embodiment of the invention, can also be that each SCell TA Group safeguards a variable in UE inside, be used to indicate the effective information of the TA value of this TA Group, perhaps the synchronous desynchronizing state of this TA Group;
When UE carries out transmitting uplink data on SCell TA Group, determine the Timing Advance obtain manner that adopts according to the enabledisable information of TA value among this TA Group (or step-out information) synchronously, when TA value invalid (or step-out) then UE adopt first subsynchronous mode to obtain Timing Advance; When the then direct current TA value of TA value effective (or synchronously) is set to the Timing Advance of this transmitting uplink data.
Wherein, this variable can comprise following several expression way:
Be used to represent the validity of the TA value of SCell TA Group, for example, 1 is that effectively 0 is invalid;
Be used to represent the synchronous desynchronizing state of SCell TA Group, for example, 1 expression is (i.e. synchronization representation TA value is effective) synchronously, 0 expression step-out (the i.e. step-out represents that the TA value is invalid).
The maintenance mode of the TA enabledisable information of the SCell TA Group in the embodiment of the invention (or synchronous desynchronizing state) is as follows:
The mode that this variable is set to step-out (or invalid) TA has following several:
The TA Timer of SCell TAGroup is overtime, and then variable is set to step-out, or is set to invalid TA;
All carrier wave deexcitations of SCell TA Group, then variable is set to step-out, or is set to invalid TA;
Network side is a step-out by the variable that display command is provided with SCell TA Group, or is invalid TA;
The mode that this variable is set to synchronously (or effectively) TA has following several:
Behind TA invalid (or step-out), UE is after initiating first transmitting uplink data on this SCell TA Group;
Network side is by display command, and for example by mechanism such as TAC, this variable of notice UE is set to synchronous or effective TA.
To sum up, referring to Fig. 8, definite method of a kind of up timing advance TA that the embodiment of the invention provides comprises step:
S101, determine the uplink synchronous situation of current auxilliary sub-district TA group SCell TAGroup;
S102, according to the uplink synchronous situation of current SCell TA Group, determine the up TA of the required employing of current transmitting uplink data.
Preferably, the described uplink synchronous situation of determining current SCell TA Group comprises: judge whether current SCell TA Group needs to carry out just subsynchronous;
Described uplink synchronous situation according to current SCell TA Group, determine to comprise the up TA of the required employing of current transmitting uplink data:
If current SCell TA Group need carry out just subsynchronous, then determine the up TA of the required employing of current transmitting uplink data according to descending timing difference, perhaps, determine the up TA that current transmitting uplink data is required by the mode that inserts at random; Otherwise, adopt the TA of current reservation or the TA that determines according to the network side notice, as the up TA of the required employing of current transmitting uplink data.Wherein, the described TA that determines according to the network side notice comprises: the TA adjustment information according to the network side notice is determined TA, or directly obtains TA from the network side notice.
Preferably, describedly judge that whether current SCell TA Group needs to carry out just subsynchronous, comprising:
Whether the special parameter (being above-mentioned variable) of judging current SCell TA Group is indicated this SCell TAGroup to be in desynchronizing state or is indicated current up TA invalid, if it is just subsynchronous to determine that then current SCell TAGroup need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Whether the TA Timer that judges current SCell TA Group correspondence moves, if operation, then definite current SCell TA Group does not need to carry out just subsynchronous, otherwise (comprising the overtime or not initial start-up as yet of TA Timer), it is just subsynchronous to determine that current SCell TA Group need carry out; Perhaps,
Judge whether all SCell or the SCell uplink that comprise among the current SCell TA Group change state of activation into by deactivation status, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Judge whether to receive the indication information that in transmitting uplink data adopt the preliminary method of synchronization of network side, if it is just subsynchronous to determine that then current SCell TA Group need carry out by the display command notice; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous.
Preferably, this method also comprises the set-up procedure of described special parameter:
When the timing advance timer TA Timer off-duty of SCell TA Group or when overtime, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA;
When all carrier wave deexcitations of SCell TA Group, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA;
The described special parameter of display command that sends by network side is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA;
Be set to the indicated value of desynchronizing state when described special parameter, or when being set to the invalid indicated value of TA, UE is after initiating first transmitting uplink data on this SCell TA Group, described special parameter is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA;
The described special parameter of display command that sends by network side is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA.
Preferably, if current SCell TA Group need carry out just subsynchronous, then determine the up TA of the required employing of current transmitting uplink data, or determine that by the mode that inserts at random after the required up TA of current transmitting uplink data, this method also comprises according to descending timing difference:
Preserve this up TA, and the TA Timer of startup simultaneously and this SCell TA Group correspondence; When receiving that network side is adjusted the indication information of TA, this up TA is adjusted according to this indication information.
Provide the introduction of several specific embodiments below.
In the embodiment of the invention, suppose that eNB is UE configuration PCell and 1 SCell, adheres to different TA Group separately, promptly up lead difference.
Embodiment one: UE is that PCell and SCell safeguard 1 TA Timer respectively, and control synchronous or desynchronizing state separately at this moment, determines that the method for TA comprises:
The TA Timer operation of PCell is in synchronous regime, and the TA Timer of SCell is not in operation (running) state, and the special parameter of promptly current SCell TA Group has indicated this SCell TA Group to be in desynchronizing state;
ENB activates the SCell of UE, makes SCell be in state of activation (activated state);
ENB sends PDCCH (UL Grant), and scheduling UE carries out transmitting uplink data on SCell;
UE is by the descending timing difference between PCell and the SCell (DL Timing difference), and new TA (Nta) value of PCell, obtain the Nta value on the SCell, and this Nta value is used for this time transmitting uplink data, and start TATimer;
Before eNB transmission TAC MAC CE notice UE adjusted the Nta value of this SCell, the transmitting uplink data of UE on this SCell all adopted this Nta value;
When eNB adjusted this Nta value by TAC MAC CE, UE was according to the mode of version 8 or 9 (Rel-8/9), adjusted this Nta value and was applied in the follow-up transmitting uplink data of this SCell.
Embodiment two: SCell enters state of activation by deactivation status, and then UE thinks and need do just subsynchronously, at this moment, determines that the method for TA comprises:
SCell is in deactivation status;
ENB activates the SCell of UE, makes SCell be in activated state;
ENB sends PDCCH (UL Grant), and scheduling UE carries out transmitting uplink data on SCell;
UE is by the DL Timing difference between PCell and the SCell, and the Nta value of PCell, obtains the Nta value on the SCell, and this Nta value is used for this time transmitting uplink data;
Before eNB transmission TAC MAC CE notice UE adjusted the Nta value of this SCell, the transmitting uplink data of UE on this SCell all adopted this Nta value;
When eNB adjusted this Nta value by TAC MAC CE, UE adjusted this Nta value according to the Rel-8/9 mode and is applied in the follow-up transmitting uplink data of this SCell;
Then empty the Nta value during SCell deexcitation.
Embodiment three: network side obtains the method for uplink synchronous by RRC signaling configuration UE automatically at the first UE that adopts when subsynchronous, be the indication information that in transmitting uplink data adopt the preliminary method of synchronization of network side by the display command notice, at this moment, the method for determining TA comprises:
(RRC connection reconfiguration) signaling is reshuffled in eNB transmission RRC connection, is wherein increasing or is revising and indicate UE to adopt UE to obtain the mode of uplink synchronous automatically according to descending timing difference when tentatively synchronous in the SCell information;
UE when being judged as first synchronous regime, then adopts the first method of synchronization of UE to obtain the method for uplink synchronous automatically in follow-up SCell transmission course.
Embodiment four: network side adopts the mode of first uplink synchronous by MAC signaling UE at SCell, and promptly network side adopts the preliminary method of synchronization by display command notice UE in transmitting uplink data, at this moment, determines that the method for TA comprises:
Expand activating (activation) or deexcitation (deactivation) MAC CE, promptly send SCell activation MAC CE or SCell deactivation MAC CE at eNB, wherein, carry 1 bit indication information simultaneously in the form of activation SCell, be used for notifying the transmitting uplink data first time corresponding on this SCell to adopt the method that obtains uplink synchronous automatically, promptly determine the up TA of the required employing of current transmitting uplink data according to descending timing difference;
After UE receives this MAC CE, find that this bit set is 1, then UE adopts the first method of synchronization of UE in the uplink first time of SCell; If this bit set is 0, then UE adopts current TA information of having stored to be used for follow-up uplink.
Embodiment five: network side adopts the mode that obtains first uplink synchronous automatically by MAC signaling UE at SCell, and promptly network side adopts the preliminary method of synchronization by the display command notice in transmitting uplink data, at this moment, determines that the method for TA comprises:
SCell is in state of activation;
ENB sends new MAC CE (new MAC CE) notice and adopts first uplink synchronous mode to obtain the method for uplink synchronous automatically in the transmitting uplink data the corresponding first time on this SCell, promptly notify on this SCell in corresponding first time of the transmitting uplink data, determine the up TA of the required employing of current transmitting uplink data according to descending timing difference;
In the uplink first time of UE after this signaling (signaling), determine the up TA (can represent) of the required employing of current transmitting uplink data according to descending timing difference with Nta.
Before eNB transmission TAC MAC CE notice UE adjusted the Nta value of this SCell, the transmitting uplink data of UE on this SCell all adopted this Nta value;
ENB adjusts this Nta value by TAC MAC CE, and UE adjusts this Ntavalue according to the Rel-8/9 mode and is applied in the follow-up transmitting uplink data of this SCell.
Embodiment six: network side adopts the mode that obtains uplink synchronous automatically by PDCCH signaling UE at SCell, and promptly network side adopts the preliminary method of synchronization by the display command notice in transmitting uplink data, at this moment, determines that the method for TA comprises:
SCell is in state of activation;
ENB sends PDCCH scheduling SCell transmitting uplink data, wherein carry the 1bit indication information, be used to indicate UE to adopt the first mode that the method for synchronization obtains uplink synchronous automatically that obtains, promptly indicate UE to determine the up TA of the required employing of current transmitting uplink data according to descending timing difference;
UE is in the transmission of the UL Grant of this PDCCH indication, and the method that adopts UE to obtain uplink synchronous is automatically determined TA (can represent with Nta), and preserves this Nta.
Before eNB transmission TAC MAC CE notice UE adjusted the Nta value of this SCell, the transmitting uplink data of UE on this SCell all adopted this Nta;
ENB adjusts this Nta value by TAC MAC CE, and UE adjusts this Ntavalue according to the Rel-8/9 mode and is applied in the follow-up transmitting uplink data of this SCell.
Embodiment seven: SCell enters state of activation by deactivation status, and then UE thinks and need do just subsynchronously, at this moment, determines that the method for TA comprises:
SCell is in deactivation status;
ENB activates the SCell of UE, makes SCell be in state of activation;
ENB sends PDCCH order (order) triggering UE and sends lead code (preamble) and carry out random access procedure on SCell;
UE obtains the Nta value on the SCell by this random access procedure, and this Nta value is used for this time transmitting uplink data, and enters synchronous regime; UE does not send any upstream data on SCell before this;
Before eNB transmission TAC MAC CE notice UE adjusted the Nta value of this SCell, the transmitting uplink data of UE on this SCell all adopted this Nta value;
When eNB adjusted this Nta value by TAC MAC CE, UE adjusted this Nta value according to the Rel-8/9 mode and is applied in the follow-up transmitting uplink data of this SCell;
Then empty the Nta value during SCell deexcitation.
Embodiment eight: SCell enters state of activation by deactivation status, and then UE thinks and need do just subsynchronously, at this moment, determines that the method for TA comprises:
SCell is in deactivation status;
ENB activates the SCell of UE, makes SCell be in state of activation;
UE is the autonomous random access procedure of initiating on this SCell, obtains the Nta value on the SCell, and this Nta value is used for this time transmitting uplink data, and enter synchronous regime; UE does not send any and inserts irrelevant upstream data at random before inserting successfully at random;
Before eNB transmission TAC MAC CE notice UE adjusted the Nta value of this SCell, the transmitting uplink data of UE on this SCell all adopted this Nta value;
When eNB adjusted this Nta value by TAC MAC CE, UE adjusted this Nta value according to the Rel-8/9 mode and is applied in the follow-up transmitting uplink data of this SCell;
Then empty the Nta value during SCell deexcitation.
Referring to Fig. 9, definite device of a kind of up timing advance TA that the embodiment of the invention provides comprises:
Uplink synchronous situation judging unit 101 is used for determining that current auxilliary sub-district TA organizes the uplink synchronous situation of SCell TA Group;
Determining unit 102 is used for the uplink synchronous situation according to current SCell TA Group, determines the up TA of the required employing of current transmitting uplink data.
Preferably,
Described uplink synchronous situation judging unit 101 judges whether current SCell TA Group needs to carry out just subsynchronous;
If current SCell TA Group need carry out just subsynchronous, then described determining unit 102 is determined the up TA of the required employing of current transmitting uplink data according to descending timing difference, perhaps, determine the up TA that current transmitting uplink data is required by the mode that inserts at random; Otherwise described determining unit 102 adopts the TA of current reservation or notifies definite TA up TA as the required employing of current transmitting uplink data according to network side
Preferably,
Described uplink synchronous situation judging unit 101, whether the special parameter of judging current SCell TA Group is indicated this SCell TA Group to be in desynchronizing state or is indicated current up TA invalid, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Described uplink synchronous situation judging unit 101, whether the TA Timer that judges current SCell TA Group correspondence moves, if operation determines that then current SCell TA Group does not need to carry out just subsynchronous, otherwise it is just subsynchronous to determine that current SCell TA Group need carry out; Perhaps,
Described uplink synchronous situation judging unit 101, judge whether all SCell or the SCell uplink that comprise among the current SCell TA Group change state of activation into by deactivation status, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Described uplink synchronous situation judging unit 101 judges whether to receive the indication information that in transmitting uplink data adopt the preliminary method of synchronization of network side by the display command notice, if it is just subsynchronous to determine that then current SCellTA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous.
Preferably, this device also comprises:
Special parameter maintenance unit 103, when being used for as the timing advance timer TA of SCell TA Group Timer overtime or off-duty, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA; When all carrier wave deexcitations of SCell TA Group, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA; The described special parameter of display command that sends by network side is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA; Be set to the indicated value of desynchronizing state when described special parameter, or when being set to the invalid indicated value of TA, UE is after initiating first transmitting uplink data on this SCell TA Group, described special parameter is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA; The described special parameter of display command that sends by network side is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA.
Preferably, this device also comprises:
In sum, the embodiment of the invention is when transmitting uplink data, according to the uplink synchronous situation among the current SCell TA Group, adopt different TA Value acquisition methods, if current this SCell TA Group need do just subsynchronous, then UE calculates up TA according to descending timing difference automatically is worth method; Under other situations, UE directly adopts the TA value of current reservation, thereby makes UE can clearly adopt the situation of automatic acquisition TA value, and the method for TA value use.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. definite method of a up timing advance TA is characterized in that, this method comprises:
Determine the uplink synchronous situation of current auxilliary sub-district TA group SCell TA Group;
According to the uplink synchronous situation of current SCell TA Group, determine the up TA of the required employing of current transmitting uplink data.
2. method according to claim 1 is characterized in that, the described uplink synchronous situation of determining current SCell TA Group comprises: judge whether current SCell TA Group needs to carry out just subsynchronous;
Described uplink synchronous situation according to current SCell TA Group, determine to comprise the up TA of the required employing of current transmitting uplink data:
If current SCell TA Group need carry out just subsynchronous, then determine the up TA of the required employing of current transmitting uplink data according to descending timing difference, perhaps, determine the up TA that current transmitting uplink data is required by the mode that inserts at random; Otherwise, adopt the TA of current reservation or notify definite TA up TA as the required employing of current transmitting uplink data according to network side.
3. method according to claim 2 is characterized in that, describedly judges that whether current SCell TA Group needs to carry out just subsynchronous, comprising:
Whether the special parameter of judging current SCell TA Group is indicated this SCell TA Group to be in desynchronizing state or is indicated current up TA invalid, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Whether the TA Timer that judges current SCell TA Group correspondence moves, if operation, then definite current SCell TA Group does not need to carry out just subsynchronous, otherwise it is just subsynchronous to determine that current SCell TA Group need carry out; Perhaps,
Judge whether all SCell or the SCell uplink that comprise among the current SCell TA Group change state of activation into by deactivation status, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Judge whether to receive the indication information that in transmitting uplink data adopt the preliminary method of synchronization of network side, if it is just subsynchronous to determine that then current SCell TA Group need carry out by the display command notice; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous.
4. method according to claim 3 is characterized in that, this method also comprises the set-up procedure of described special parameter:
During overtime or off-duty, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA as the timing advance timer TA of SCell TA Group Timer;
When all carrier wave deexcitations of SCell TA Group, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA;
The described special parameter of display command that sends by network side is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA;
Be set to the indicated value of desynchronizing state when described special parameter, or when being set to the invalid indicated value of TA, UE is after initiating first transmitting uplink data on this SCell TA Group, described special parameter is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA;
The described special parameter of display command that sends by network side is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA.
5. according to claim 2,3 or 4 described methods, it is characterized in that, if current SCell TA Group need carry out just subsynchronous, then determine the up TA of the required employing of current transmitting uplink data according to descending timing difference, or determine that by the mode that inserts at random after the required up TA of current transmitting uplink data, this method also comprises:
Preserve this up TA, and the TA Timer of startup simultaneously and this SCell TA Group correspondence; When receiving that network side is adjusted the indication information of TA, this up TA is adjusted according to this indication information.
6. definite device of a up timing advance TA is characterized in that, this device comprises:
Uplink synchronous situation judging unit is used for determining that current auxilliary sub-district TA organizes the uplink synchronous situation of SCell TA Group;
Determining unit is used for the uplink synchronous situation according to current SCell TA Group, determines the up TA of the required employing of current transmitting uplink data.
7. device according to claim 6 is characterized in that,
Described uplink synchronous situation judging unit judges whether current SCell TA Group needs to carry out just subsynchronous;
If current SCell TA Group need carry out just subsynchronous, then described determining unit is determined the up TA of the required employing of current transmitting uplink data according to descending timing difference, perhaps, determine the up TA that current transmitting uplink data is required by the mode that inserts at random; Otherwise described determining unit adopts the TA of current reservation or notifies definite TA up TA as the required employing of current transmitting uplink data according to network side.
8. device according to claim 7 is characterized in that,
Described uplink synchronous situation judging unit, whether the special parameter of judging current SCell TA Group is indicated this SCell TA Group to be in desynchronizing state or is indicated current up TA invalid, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Described uplink synchronous situation judging unit, whether the TA Timer that judges current SCell TA Group correspondence moves, if operation determines that then current SCell TA Group does not need to carry out just subsynchronous, otherwise it is just subsynchronous to determine that current SCell TA Group need carry out; Perhaps,
Described uplink synchronous situation judging unit judges whether all SCell or the SCell uplink that comprise among the current SCell TA Group change state of activation into by deactivation status, if it is just subsynchronous to determine that then current SCell TA Group need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous; Perhaps,
Described uplink synchronous situation judging unit judges whether to receive the indication information that in transmitting uplink data adopt the preliminary method of synchronization of network side by the display command notice, if it is just subsynchronous to determine that then current SCell TAGroup need carry out; Otherwise, determine that current SCell TA Group does not need to carry out just subsynchronous.
9. device according to claim 8 is characterized in that, this device also comprises:
The special parameter maintenance unit, when being used for as the timing advance timer TA of SCell TA Group Timer overtime or off-duty, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA; When all carrier wave deexcitations of SCell TA Group, described special parameter is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA; The described special parameter of display command that sends by network side is set to the indicated value of desynchronizing state, or is set to the invalid indicated value of TA; Be set to the indicated value of desynchronizing state when described special parameter, or when being set to the invalid indicated value of TA, UE is after initiating first transmitting uplink data on this SCell TA Group, described special parameter is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA; The described special parameter of display command that sends by network side is set to the indicated value of synchronous regime, or is set to the effective indicated value of TA.
10. according to claim 7,8 or 9 described devices, it is characterized in that this device also comprises:
The TA maintenance unit is used to preserve the up TA of described determining unit according to the definite required employing of current transmitting uplink data of descending timing difference, and the TATimer of startup simultaneously and this SCell TA Group correspondence; And when receiving that network side is adjusted the indication information of TA, this up TA is adjusted according to this indication information.
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Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
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Effective date of registration: 20210602 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |