CN101990295B - Uplink synchronous control method and system and base station - Google Patents
Uplink synchronous control method and system and base station Download PDFInfo
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Abstract
The embodiment of the invention discloses an uplink synchronous control method, an uplink synchronous control system and a base station. The method comprises that: a base station NodeB generates an uplink synchronous control ULSC command according to received signals of all uplinks of user equipment UE on the nth subframe, and the ULSC command is transmitted to the UE through each downlink of the UED on the (n+d)th subframe; and the UE receives the ULSC command and performs uplink synchronous control according to the ULSC, wherein n and d are natural numbers; n is the serial number of the current subframe; and d is determined according to the processing time of generating the ULSC command by the received signals. The system comprises NodeB and UE. The base station comprises a ULSC command generating module and a ULSC command sending module. The invention can ensure uplink synchronous adjustment of wireless channels of the UE.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of ascending synchronous control method, system and base station.
Background technology
According to present 3GPP standard, a UE can have a plurality of up channels simultaneously, for example has simultaneously the physical uplink channel (E-PUCH) of uplink special physical channel (UL DPCH), high-speed shared information channel (HS-SICH), non-scheduled enhancing dedicated channel and the E-PUCH of scheduling.Wherein, the E-PUCH of scheduling and non-scheduled E-PUCH can not occur simultaneously in same subframe.At same ascending time slot, UE has at most 2 up channels.
At present, uplink synchronous control (the Uplink SynchronizationControl of each up channel of UE, ULSC) be separate: NODEB carries out channel estimating according to the reception signal of each up channel place time slot, obtain the channel estimation results of each up channel, then generate independently the uplink synchronous control command of each up channel according to the channel estimation results of each up channel, the uplink synchronous control command of each up channel is carried to UE independently by the down channel with this up channel pairing; UE extracts the uplink synchronous control command of corresponding up channel from the down channel with each up channel pairing, Timing Advance (TA) according to the corresponding up channel of this order adjustment adopts when sending this up channel and adjusts the signal that later TA sends this up channel.
When two up channels that UE occurs are positioned at same ascending time slot, the ULSC of these two up channels will have following features:
(1) these two up channels will be kept an identical TA.
(2) generation of the ULSC of these two up channels order and transmission still are separate: NODEB carries out channel estimating according to the reception signal of these two up channel place time slots respectively, obtain the channel estimation results of each up channel, NODEB generates the uplink synchronous control command of each up channel independently according to the channel estimation results of each up channel, and the uplink synchronous control command of each up channel is carried to UE independently by the down channel with this up channel pairing.
(3) the no longer ULSC order of these two up channels of separate responses of UE.When the up ULSC order that receives from the down channel with this two up channels pairing as UE was not identical, because the adjustment direction of the TA that the ULSC of these two up channels order is kept jointly to these two up channels is different, UE did not just adjust this TA; The up ULSC that receives from the down channel with this two up channels pairing as UE orders when identical, the ULSC order of these two up channels is the same to the adjustment direction of the TA that these two up channels are kept jointly, and UE just adjusts this TA according to the ULSC order that receives.
In sum, generation and the transmission of the ULSC of each up channel of UE order are separate, and each up channel of UE has a TA.When two up channels that UE occurs were positioned at same ascending time slot, these two up channels were kept an identical TA.
The below illustrates the process that up channel independently generates ULSC order, the independent ULSC of transmission order and carries out uplink synchronous control according to the independent ULSC order that sends take UL DPCH as example.
Fig. 1 is the method flow diagram that carries out uplink synchronous control in the prior art at UL DPCH, and as shown in Figure 1, the method comprises:
In this step, NodeB receives signal at UL DPCH place time slot, carry out channel estimating according to the signal that receives, then calculate the ULSC order of this UL DPCH according to the channel estimation results employing ULSC algorithm of UL DPCH, and by the DL DPCH with this UL DPCH pairing UE is issued in described ULSC order.Carry out the method for channel estimating and be not content of the present invention according to the channel estimation results of a up channel by the method that the ULSC algorithm calculates the ULSC order of this up channel according to the reception signal of an ascending time slot, can consult pertinent literature.
In this step, UE from the reception signal of the DL DPCH of this UL DPCH pairing extract this UL DPCH the ULSC order, accumulative total is extracted M ULSC order, then with this M ULSC order merging, and the ULSC that responds after this merging orders.Wherein, M is the frequency of ULSC, is disposed simultaneously to NodeB and UE by RNC.
The merging mode of M ULSC order is:
Record respectively M ULSC order intermediate value and be the number of the ULSC order of " UP ", " DOWN " and " DO NITONG ".If value for the number of the ULSC order of " UP " is maximum, then merges later ULSC order and is " UP "; If value for the number of the ULSC order of " DOWN " is maximum, then merges later ULSC order and is " DOWN "; If value for the number of the ULSC order of " DO NOTING " is maximum, then merges later ULSC order and is " DO NOTING ".
The concrete grammar of the ULSC order after response merges is: if the order of the ULSC after merging is " UP ", then UE adjusts forward a step-length with the TA of this UL DPCH; If the order of the ULSC after this merging is " Down ", then UE adjusts a step-length backward with the TA of this UL DPCH; If the order of the ULSC after this merging is " DO NOTING ", then UE remains unchanged the TA of this UL DPCH.Wherein, TA is used for the time of expression transmission UL DPCH signal with respect to the number of chips that shift to an earlier date fiducial time or hysteresis sends, particularly, if TA less than 0, then sends UL DPCH signal in advance, the transmission UL DPCH signal if TA greater than 0, then lags behind.Described synchronous step-length is disposed to NodeB and UE simultaneously by RNC.
Each HS-SICH has a HS-SCCH who matches with its.HS-SCCH is a DL shared channel that HSDPA is proprietary.When HS-SCCH is assigned to a UE, have a dispatching cycle.Within the dispatching cycle of this HS-SCCH, this channel is assigned to this UE.Corresponding to the dispatching cycle of each HS-SCCH, have the dispatching cycle of a HS-SICH.Within the dispatching cycle of this HS-SICH, this HS-SICH is assigned to this UE.
Carry out the method for uplink synchronous control and the difference of method shown in Figure 1 is at HS-SICH: UE sends a signal to NodeB at HS-SICH, NodeB carries out channel estimating according to the reception signal of this HS-SICH place time slot, obtain the channel estimation results of HS-SICH, channel estimation results according to HS-SICH calculates the ULSC order according to the ULSC algorithm, and by the HS-SCCH with this HS-SICH pairing this UE is issued in this ULSC order.Wherein, UE is merged the ULSC order, is combined the response method of rear ULSC order and the method for adjusting TA according to method, the UE that the ULSC algorithm calculates the ULSC order by the channel estimation results of HS-SICH, sees also the relevant narration of Fig. 1.Here need clear and definite: for HS-SICH, M is fixed as: M=1.
Each non-scheduled E-PUCH has a non-scheduled E-HICH who matches with its.E-HICH is a DL shared channel that HSUPA is proprietary.The corresponding E-HICH subframe of each non-scheduled E-PUCH subframe.Timing relationship between these two subframes is determined.Represent timing difference between E-HICH subframe and the E-PUCH subframe with T, then the E-HICH subframe corresponding with each E-PUCH subframe always is later than T subframe of this E-PUCH subframe.The generation method of the ULSC order on the E-PUCH is identical with the generation method of the ULSC order of UL DPCH.NODEB is by the reception signal of this non-scheduled E-PUCH place time slot, carry out channel estimating, obtain the channel estimation results of E-PUCH, channel estimation results according to E-PUCH is ordered according to the ULSC that the ULSC algorithm calculates this non-scheduled E-PUCH, and by the non-scheduled E-HICH with this E-PUCH pairing UE is issued in this ULSC order.UE extracts this ULSC order from the reception signal of this non-scheduled E-HICH.Wherein, the response method of ULSC order seen also the relevant narration of Fig. 1 with the method for adjusting TA.Here need clear and definite: for non-scheduled E-PUCH, M is fixed as: M=1.
The E-PUCH of scheduling and the E-AGCH of scheduling match.When E-AGCH is assigned to a UE, have a dispatching cycle.Within this cycle, this channel is assigned to this UE.Corresponding to the dispatching cycle of each E-AGCH, have the dispatching cycle of the E-PUCH of a scheduling.Within the dispatching cycle of this E-PUCH, this channel is assigned to this UE.Within the dispatching cycle of E-PUCH, this UE sends a signal to NODEB by this E-PUCH channel, NODEB is according to the reception signal of this E-PUCH place time slot, carry out channel estimating, obtain the channel estimation results of E-PUCH, then order by the ULSC that the ULSC algorithm calculates this E-PUCH according to the channel estimation results of E-PUCH, by the E-AGCH with this E-PUCH pairing this UE is issued in this ULSC order.This UE adjusts the TA of the E-PUCH of scheduling according to the ULSC order of extracting from the reception signal of E-AGCH.Wherein, the generation method of ULSC order, the response method of ULSC order and the method for adjustment of TA see also the relevant narration of Fig. 1.Here need clear and definite: for the E-PUCH of scheduling, M is fixed as: M=1.
In sum, in present ULSC implementation method, each up channel of UE has a TA.When UE occurring when an ascending time slot has a plurality of up channel, each up channel independently produces the ULSC order separately, the ULSC that each up channel generates alone is probably different, and wireless channel corresponding to each up channel is identical, then according to the different ULSC order from different up channels same wireless channel is carried out the direction possibility difference that TA adjusts, this is obviously unreasonable.
Simultaneously, each up channel of UE all is discontinuous, if each up channel independently produces the ULSC order, and carry independently described ULSC by the down channel that described up channel matches and order, meeting is so that the frequency of the ULSC order of actual each up channel that receives of UE is lower, thereby cause can't be in time the up channel of this UE being carried out the uplink synchronous adjustment, affect communication quality.
The below introduces the discontinuity of up channel and the shortcoming that each up channel independently generates ULSC order and the independent ULSC of transmission order in detail.
The discontinuity of up channel:
(1) UL DPCH divides the multiplex mode configuration by frame, has the interval between adjacent two UL DPCH cycles, and UL DPCH does not send any signal in this interval.Even at each ULDPCH in the cycle, if adopt discontinuous transmission (Discontinuous Transmission, DTX), then UE within each UL DPCH cycle owing to have data to send also may not occur sending to be interrupted phenomenon.
(2) non-scheduled E-PUCH also divides multiplex mode to dispose to UE by frame.Therefore, there is the interval usually in adjacent two non-scheduled E-PUCH between the cycle.In this interval, E-PUCH does not send any signal.
(3) as for the E-PUCH of HS-SICH and scheduling, these two channels are shared channels, and therefore, UE is difficult to forever take this two channels.
In sum, UL DPCH, the HS-SICH of a UE, non-scheduled E-PUCH and scheduling E-PUCH all are likely discontinuous.
When each up channel is discontinuous, UE produces independently the ULSC order and sends independently described ULSC order by the down channel with described up channel pairing by each up channel, probably cause the generated frequency of ULSC order of each up channel very low, the ULSC order that is generated by this up channel is carried to the lower problem of the frequency of UE.For example, when a up channel occurred sending the interval, NODEB can't generate in interim the ULSC order of this up channel, therefore, in the transmission interim of this up channel, NODEB does not have effective ULSC order to carry to this UE by the down channel with this up channel pairing.Simultaneously, only carry the ULSC order of this up channel by the down channel with this up channel pairing, also may occur: the ULSC order that this up channel generates does not have corresponding down channel can carry situation to UE, or does not have effective ULSC order can be carried situation to UE.The below describes for example:
Fig. 2 is assigned to the UL DPCH of same UE and the schematic diagram that non-scheduled E-PUCH sends respectively the ULSC order independently.
The frame of UL DPCH divides multiplexing (TDM) parameter to comprise: the TDM cycle is 4 TTI, each TTI=10ms=2 5ms subframe, and front 2 TTIs of this TDM in the cycle are assigned to this UE.With the TDM cycle starting point of the DL DPCH of UL DPCH pairing than the late TTI of the TDM cycle starting point of this UL DPCH, the TDM cycle of this DL DPCH also is 4 TTI, wherein front 2 TTI are assigned to this UE.
The TDM parameter of non-scheduled E-PUCH comprises: the TDM cycle is 4 TTI, and TTI=10ms is the TDM of 4 TTI in the cycle in each length, and rear 2 TTI are assigned to this UE.With the TDM cycle starting point of the non-scheduled E-HICH of non-scheduled E-PUCH pairing than the late TTI of the TDM cycle starting point of this non-scheduled E-PUCH, i.e. 2 subframes.
As shown in Figure 2, first subframe is numbered n among Fig. 2, and wherein the n～n+7 subframe and the n+8～n+15 subframe is respectively first TDM cycle and second TDM cycle of UL DPCH and non-scheduled E-PUCH; The n+2～n+9 subframe and the n+10～n+17 subframe is respectively first TDM cycle and second TDM cycle of DL DPCH and non-scheduled E-HICH.Therefore, the n～n+3 subframe and n+8～n+11 subframe is UL DPCH subframe, the n+2～n+5 subframe and n+10～n+13 subframe is DL DPCH subframe, the n+4～n+7 and n+12～n+15 subframe is non-scheduled E-PUCH subframe, and the n+6～n+9 and n+14～n+17 subframe is non-scheduled E-HICH subframe.
Referring to Fig. 2, when UL DPCH and non-scheduled E-PUCH produce independently respectively the ULSC order and send independently described ULSC order by the down channel with described up channel pairing, in each DPCH subframe or non-scheduled E-PUCH subframe, NodeB generates a ULSC order.Suppose that it is d=1 subframe that ULSC that NodeB generates this UE of this subframe according to UE at the reception signal of the up channel place of " n " subframe time slot orders the needed time, then show: the ULSC order of " n " subframe that NodeB generates is merely able to carry to UE at the down channel of " n+1 " subframe by this UE.D is exactly the time delay that NODEB generates the ULSC order.
In first TDM cycle of UL DPCH, NodeB should issue UE by DL DPCH in the n subframe in the n+1 subframe according to the ULSC order of the reception signal generation of UL DPCH, still, because the n+1 subframe is not DL DPCH subframe, therefore, this ULSC order can't be issued UE; The n+5 subframe is DL DPCH subframe, its ULSC that should carry corresponding UL DPCH orders to UE, but, because the n+4 subframe is not UL DPCH subframe, do not produce the ULSC order of corresponding UL DPCH in the n+4 subframe, therefore, DL DPCH can only carry " DO NOTING " order to UE in the n+5 subframe.
In second TDM cycle of UL DPCH, the processing mode that NodeB produces ULSC order and the method for the ULSC order being issued UE and first TDM cycle of UL DPCH is identical.As seen, when UL DPCH produces independently ULSC order and carries independently described ULSC order by DL DPCH, be that the TDM of 8 subframes is in the cycle in each length, all can only generate four ULSC orders, but three ULSC orders can only be issued UE, and also existing with the DLDPCH of this UL DPCH pairing does not have effective ULSC to order carry-on situation.
Similarly, when non-scheduled E-PUCH independently sends up ULSC order, need to issue UE in the n+5 subframe in the ULSC order that the n+4 subframe generates, still, because the n+5 subframe is not the subframe of non-scheduling E-HICH, so this ULSC order can't be issued UE; Because the n+8 subframe is not non-scheduling E-PUCH subframe, there is not corresponding ULSC order to produce, therefore, in the n+9 subframe, non-scheduled E-HICH does not have effective ULSC order to carry to UE.That is to say, be that the TDM of 8 subframes is in the cycle in each length of non-scheduled E-PUCH, also be to generate four ULSC orders, but three ULSC orders can only be issued UE, and also existing with the non-scheduled E-HICH of this non-scheduled E-PUCH pairing does not have effective ULSC to order carry-on situation.
By to the analysis of Fig. 2 as can be known, at first TDM in the cycle, i.e. the n～n+7 subframe, any one up channel among ULDPCH and the non-scheduled E-PUCH is that the TDM of 8 subframes is merely able to generate 4 ULSC orders in the cycle in length, and these 4 ULSC orders only have 3 ULSC orders to be carried to UE.Compare with the cycle of TDM, the frequency of the ULSC order of each up channel that NODEB generates is very low, only has time (only having four subframes to generate the ULSC order in 8 subframes) of 50% can generate the ULSC order; Carry to the frequency of the ULSC of UE order lowlyer, only have the ULSC order of 75% (four ULSC orders only have three and are carried to UE) to be carried to UE.Therefore, above-mentioned each up channel independently carries out the performance of the ULSC that the method for ULSC can not Effective Raise UE.
As seen, when up channel is discontinuous, if each up channel independently produces the ULSC order, and carry independently described ULSC by the down channel that described up channel matches and order, meeting is so that the frequency of the ULSC order of actual each up channel that receives of UE is lower, thereby cause can't be in time the wireless channel of this UE being carried out the uplink synchronous adjustment, affect communication quality.
Summary of the invention
In view of this, the purpose of the embodiment of the invention is to provide a kind of ascending synchronous control method, system and device, to guarantee that the wireless channel of UE is carried out the performance that uplink synchronous is adjusted.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of ascending synchronous control method, the method comprises:
Base station node B generates uplink synchronous control ULSC order according to user equipment (UE) at the reception signal of all up channels of n subframe, and this ULSC order is issued this UE by this UE at each down channel of n+d subframe;
This UE receives this ULSC order and carries out uplink synchronous control according to this ULSC order;
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal.
A kind of uplink synchronous control system, this system comprises NodeB and UE;
Described NodeB according to generating a ULSC order from UE at the signal of all up channels receptions of n subframe, issues this UE by this UE at each down channel of n+d subframe with this ULSC order;
Described UE receives this ULSC order and carries out uplink synchronous control according to this ULSC order;
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal.
A kind of base station, this base station comprise ULSC order generation module and ULSC order sending module;
Described ULSC order generation module is used for generating a ULSC order according to UE at the signal of all up channels receptions of n subframe;
Described ULSC order sending module is used for this ULSC order is issued this UE by this UE at each down channel of n+d subframe;
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal.
In sum, the ULSC that NODEB of the present invention unites all up channels that this UE has namely generates a ULSC order, and the down channel of this UE is joined together to carry the ULSC order of UE.The channel estimation results of all up channels that UE had in current subframe at each subframe NODEB merges, then generate a ULSC order according to merging later channel estimation results according to the ULSC algorithm, and join together to carry the ULSC order of this UE by all down channels of this UE.Such processing can improve the frequency of the ULSC order that generates UE greatly, and the ULSC order of greatly increase generation is carried the probability to UE.Therefore, the performance of ULSC that can Effective Raise UE.
Description of drawings
Fig. 1 is the method flow diagram that carries out uplink synchronous control in the prior art at UL DPCH.
Fig. 2 is assigned to the UL DPCH of same UE and the schematic diagram that non-scheduled E-PUCH sends respectively the ULSC order independently.
Fig. 3 is the method flow diagram that carries out upload control provided by the invention.
Fig. 4 is the schematic diagram that produces and unite transmission ULSC order of uniting provided by the invention.
Fig. 5 is that the system that carries out uplink synchronous control provided by the invention forms schematic diagram.
Fig. 6 is the base station schematic diagram that carries out uplink synchronous control provided by the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, referring to accompanying drawing, the embodiment that develops simultaneously, the present invention is described in more detail.
When UE had two or more channel among the E-PUCH of UL DPCH, HS-SICH, non-scheduled E-PUCH and scheduling, the wireless channel of distributing to these up channels experience of UE was identical.Therefore, should carry out unified TA to these up channels and adjust, namely the TA of these up channels should be identical.That is to say that each UE should have unique TA, rather than each ascending time slot that the up channel of each up channel of UE or UE takies there is a TA.
Among the present invention, the join together ULSC order of unified this UE of generation of all up channels of UE, and the unified ULSC order of carrying this UE of joining together of all down channels of this UE.In same subframe, all up channels of this UE join together to generate unique ULSC order.In same subframe, all down channels of this UE carry identical ULSC order.In same subframe, the soft-decision bit of the ULSC order that this UE will extract from each down channel of this UE merges, and then is combined the result and carries out hard decision and obtain the ULSC order that NODEB sends to UE.UE adjusts TA according to this ULSC order.This TA is used for sending the signal of all up channels of this UE in the same subframe.Unite in the method for carrying out ULSC M=1 at all up channels of above-mentioned UE.
This all up channels that belong to same UE of the present invention are united the method that all down channels that generate ULSC and belong to same UE join together to send the ULSC order, can improve the frequency that generates the ULSC order, improve the probability that the ULSC order that generates can be sent to UE, thereby improve the ULSC frequency of UE, improve the ULSC performance.
Fig. 3 is the method flow diagram that carries out upload control provided by the invention, and as shown in Figure 3, the method comprises:
Step 301, in current subframe, NodeB carries out channel estimating according to the reception signal of the time slot at each up channel place of UE, obtains the channel estimation results of each up channel; NODEB merges the channel estimation results at all up channels of current subframe UE; NODEB generates the ULSC order of current subframe according to the ULSC algorithm according to the channel estimation results that merges.
The merging method of the channel estimation results of a plurality of up channels is as follows:
Method 1: select the maximum up channel of signal to noise ratio (SNR), the channel estimation results of the channel estimation results of this up channel as merging;
Method 2: the channel estimation results of all up channels of UE is weighted rear merging according to SNR: namely, the channel estimation results of each up channel be multiply by the SNR of this up channel, then will sue for peace through the channel estimation results of each up channel of SNR weighting, summed result is exactly the channel estimation results that merges.
Step 302, NodeB issues this UE with this ULSC order by each down channel of this UE.
In this step, NodeB can send to this UE by current each down channel that has of this UE with this ULSC order.
Wherein, if it is d that NodeB generates the time delay of ULSC order, then at n descending sub frame, current all down channels that have of UE carry the ULSC order according to the signal generation of the up channel of (n-d) subframe, if NodeB does not generate ULSC order (up channel that does not have UE in this subframe) in (n-d) subframe, then NodeB with up-to-date generation and still be not carried order to the ULSC of UE and issue this UE, and when not yet not being carried to the ULSC of this UE order, " DO NOTING " issued this UE.
Step 303, this UE has a unique TA, and this UE receives this ULSC order and carries out uplink synchronous control according to this ULSC order, adjusts TA.
In this step, UE extracts described ULSC order from this UE the signal that all down channels that current subframe has receive, keeps a unique TA according to described ULSC order, carries out uplink synchronous control according to this TA.
Particularly, UE can extract the soft-decision bit of ULSC order with the down channel that belongs to this UE from each of current subframe, UE merges the soft-decision bit of the ULSC that all down channels extract, then being combined the result carries out hard decision and obtains final ULSC order, last according to this final ULSC order adjustment TA, and carry out uplink synchronous according to this TA and control, namely when sending the signal of each up channel, adopts same subframe UE identical TA.
Wherein, described up channel can be UL DPCH, HS-SICH, non-scheduled E-PUCH or the E-PUCH of scheduling.Described down channel can be DL DPCH, HS-SCCH, non-scheduled E-HICH or the E-AGCH of scheduling.
The below from NodeB side and UE side, is explained the present invention respectively.
The NodeB adnation becomes the method for ULSC order to comprise:
NodeB records the up channel that this UE has in current subframe for each UE, and described up channel can be UL DPCH, HS-SICH, non-scheduled E-PUCH or the E-PUCH of scheduling.Then all up channels that had in current subframe by this UE join together to generate the ULSC order, and UE is defined as this ULSC order in all up channels ULSC order separately that current subframe has.
Wherein, a plurality of up channels that all up channels that UE has in current subframe a plurality of up channels that can be UE have at an ascending time slot of current subframe also can be UE has at a plurality of time slots of current subframe.Particularly:
(1) when an ascending time slot in current subframe, when UE has a plurality of up channel simultaneously, generate a unique ULSC order by all these up channels, and the ULSC that each up channel that this ULSC order is defined as this UE of this time slot generates orders.
(2) when in current subframe, UE has a plurality of ascending time slots, and when this UE has at least one up channel on each ascending time slot, this UE joins together to generate unique ULSC order at all up channels of all ascending time slots of current subframe, and this order is defined as the ULSC order that each up channel of each ascending time slot generates in this subframe.
The method that the NodeB side sends the ULSC order comprises:
NodeB records the down channel that this UE has in current subframe for each UE, and described down channel can be DL DPCH, HS-SCCH, non-scheduled E-HICH or the E-AGCH of scheduling.Then all down channels that had in current subframe by this UE join together to send the ULSC order.
Particularly, if UE has a plurality of down channels in current subframe, then carry identical ULSC by all these down channels and order to UE.The concrete grammar that carries the ULSC order sees also the relevant narration of step 302.
In the UE side, the method for carrying out uplink synchronous control comprises:
UE records all down channels that this UE has in current subframe, described down channel comprises: DL DPCH, HS-SCCH, non-scheduled E-HICH or the E-AGCH of scheduling.
UE extracts unique ULSC order according to the signal that receives respectively from described all down channels in current subframe, adjusts unique TA with this ULSC order.Adopt this TA to send the signal of all up channels of all ascending time slots of this UE.
Particularly, if UE has a plurality of down channels in current subframe, then UE extracts a unique ULSC order from the reception signal of all these down channels.UE obtains TA according to the ULSC order of extracting, and carries out uplink synchronous control according to this TA.
The below illustrates to be united by current all up channels that have of UE and produces the ULSC order, and is united by current all down channels that have of this UE method to this UE is carried in this ULSC order, specifically sees also Fig. 4.
Fig. 4 is the schematic diagram that produces and unite transmission ULSC order of uniting provided by the invention.
Among Fig. 4, the n～n+3 subframe and the n+8～n+11 subframe is UL DPCH subframe, the n+2～n+5 and n+10～n+13 are DL DPCH subframes, the n+2～n+5 and n+10～n+13 are non-scheduled E-PUCH subframes, the n+4～n+7 and n+12～n+15 are non-scheduled E-HICH subframes, and the time delay that NodeB produces the ULSC order is 1 subframe.Wherein, in n+2 and n+3 subframe, UE has UL DPCH and non-scheduled E-PUCH simultaneously, then in n+2 and n+3 subframe, UE will generate unique ULSC order according to the signal that receives respectively is common on UL DPCH and non-scheduled E-PUCH, to carry to UE by DL DPCH in the n+3 subframe in the ULSC order that the n+2 subframe generates, to carry respectively to UE by DL DPCH and non-scheduled E-HICH in the n+4 subframe in the ULSC order that the n+3 subframe generates, will be carried to UE respectively by the DL DPCH of n+5 subframe and non-scheduled E-HICH by the ULSC order that the E-PUCH of n+4 subframe generates.
All down channels that all up channels that the below illustrates same UE carry out combined U LSC and same UE join together to send the ULSC order can make frequency and the performance of the ULSC of this UE be improved really.
Take Fig. 2 as example, when adopting the present invention to carry out uplink synchronous control, UL DPCH and the non-scheduled E-PUCH of UE join together to produce ULSC, and the DL DPCH corresponding with UL DPCH and non-scheduled E-PUCH and non-scheduled E-HICH join together to send ULSC respectively.
Particularly, among Fig. 2, be that the up TDM of 8 subframes is in the cycle in each length, front 4 subframes are UL DPCH subframes, the E-PUCH subframe that rear 4 subframes are non-scheduling, NodeB is in 4 the ULSC orders of reception signal generation according to UL DPCH of front 4 subframes, and these 4 ULSC orders join together to issue UE by DLDPCH and non-scheduled E-HICH.Wherein, because the n+1 subframe is neither the DL DPCH subframe of this UE, non-scheduled E-HICH subframe that neither this UE, therefore the 1st ULSC order can't be issued this UE, and rear three ULSC order, namely the ULSC that produces of the n+1～n+3 subframe orders and issues UE by DL DPCH.Since the n+4 subframe, NodeB generates 4 ULSC orders by non-scheduled E-PUCH, and these 4 ULSC orders are united by DL DPCH and non-scheduled E-HICH and sent to UE, and wherein the ULSC order that generates of n+4 subframe sends to this UE by DL DPCH.The ULSC order that the n+5～n+7 subframe generates is issued UE by non-scheduled E-HICH.Like this, in first TDM cycle, the NodeB symbiosis becomes 8 ULSC orders, and wherein 7 ULSC orders can be issued UE.
Second TDM cycle generates ULSC orders identical with first TDM cycle with the method that sends the ULSC order.Particularly, front 4 subframes of second TDM in the cycle produce the ULSC order according to UL DPCH, first ULSC order wherein, i.e. the ULSC order of n+8 subframe generation is issued this UE by non-scheduled E-HICH, and the ULSC order that the n+9～n+11 subframe produces is issued this UE by DL DPCH.Rear 4 subframes of second TDM in the cycle produce the ULSC order according to the upper signal that receives of non-scheduled E-PUCH, wherein, the ULSC order that the n+12 subframe produces is issued UE by DL DPCH, and the ULSC order that the n+13～n+15 subframe produces is issued UE by non-scheduled E-HICH.Like this, second TDM cycle, the NodeB symbiosis becomes 8 ULSC orders, and these 8 ULSC orders can be carried to UE.
As seen, produce independently ULSC order and send independently described ULSC order by the down channel with described up channel pairing with each up channel in the prior art and compare, the present invention can make the frequency of the generation ULSC of this UE be improved, when the frequency of ULSC order improves, can be more in time the up channel of UE be carried out uplink synchronous control, therefore can improve the ULSC performance.
The below provides the system that carries out uplink synchronous control and the embodiment of base station.
Fig. 5 is that the system that carries out uplink synchronous control provided by the invention forms schematic diagram, and as shown in Figure 5, this system comprises NodeB501 and UE502.
NodeB501 according to generating a ULSC order from UE502 at the reception signal of all up channels of n subframe, issues this UE502 by UE502 at each down channel of n+d subframe with this ULSC order.
UE502 receives this ULSC order and carries out uplink synchronous control according to this ULSC order.
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal.
Fig. 6 is the base station schematic diagram that carries out uplink synchronous control provided by the invention, and as shown in Figure 6, this base station comprises ULSC order generation module 601 and ULSC order sending module 602.
ULSC orders generation module 601, is used for generating uplink synchronous control ULSC order according to UE at the signal of all up channels receptions of n subframe.
ULSC orders sending module 602, is used for this ULSC order is issued this UE by this UE at each down channel of n+d subframe.
Wherein ULSC order generation module 601 carries out channel estimating to each up channel respectively according to the reception signal of each up channel, and the channel estimation results of each channel is merged, and generates the ULSC order according to amalgamation result.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention, all any modifications of making within the spirit and principles in the present invention, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. ascending synchronous control method is characterized in that the method comprises:
Base station node B generates uplink synchronous control ULSC order according to user equipment (UE) at the reception signal of all up channels of n subframe, and this ULSC order is issued this UE by this UE at each down channel of n+d subframe;
This UE receives this ULSC order and carries out uplink synchronous control according to this ULSC order;
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal;
Wherein, described base station node B comprises in a uplink synchronous control of the reception signal generation ULSC of all up channels of n subframe order according to user equipment (UE):
NodeB carries out channel estimating to each up channel respectively according to the reception signal of each up channel, and the channel estimation results of each channel is merged, and generates the ULSC order according to amalgamation result.
2. the method for claim 1 is characterized in that, describedly this ULSC order is issued this UE by this UE at each down channel of n+d subframe comprises:
NodeB with up-to-date generation and still be not carried order to the ULSC of UE and issue this UE, and when the ULSC order that not yet is not carried to this UE, will " DO NOTING " order and issue this UE.
3. the method for claim 1 is characterized in that, described UE receives this ULSC order and comprises:
UE extracts described ULSC order from this UE the signal that all down channels that the n+d subframe has receive, keep unique Timing Advance TA according to described ULSC order, carries out uplink synchronous control according to this TA.
4. method as claimed in claim 3 is characterized in that, keeps unique Timing Advance TA according to described ULSC order and comprises:
UE belongs to the soft-decision bit of the down channel extraction ULSC order of this UE from each of current subframe, UE merges the soft-decision bit of the ULSC that all down channels extract, then be combined the result and carry out hard decision and obtain final ULSC order, last according to should final ULSC order adjustment TA.
5. the method for claim 1 is characterized in that, described channel estimation results to each channel merges and comprises:
The signal to noise ratio snr of each channel relatively is defined as amalgamation result with the channel estimation results of the up channel of SNR maximum;
Perhaps, the channel estimation results of each channel SNR according to respective channel is weighted, the weighted results of each channel is sued for peace, summed result is defined as amalgamation result.
6. such as the described method of the arbitrary claim of claim 1 to 4, it is characterized in that described up channel comprises:
UL DPCH, HS-SICH, non-scheduled E-PUCH and/or the E-PUCH of scheduling.
7. such as the described method of the arbitrary claim of claim 1 to 4, it is characterized in that described down channel comprises:
DL DPCH, HS-SCCH, non-scheduled E-HICH and/or the E-AGCH of scheduling.
8. a uplink synchronous control system is characterized in that, this system comprises NodeB and UE;
Described NodeB, according to generating a ULSC order from UE at the signal of all up channels receptions of n subframe, this ULSC order is issued this UE by this UE at each down channel of n+d subframe, wherein, NodeB carries out channel estimating to each up channel respectively according to the reception signal of each up channel, channel estimation results to each channel merges, and generates the ULSC order according to amalgamation result;
Described UE receives this ULSC order and carries out uplink synchronous control according to this ULSC order;
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal.
9. a base station is characterized in that, this base station comprises ULSC order generation module and ULSC order sending module;
Described ULSC order generation module, be used for generating a ULSC order according to UE at the signal of all up channels receptions of n subframe, wherein, reception signal according to each up channel carries out channel estimating to each up channel respectively, channel estimation results to each channel merges, and generates the ULSC order according to amalgamation result;
Described ULSC order sending module is used for this ULSC order is issued this UE by this UE at each down channel of n+d subframe;
Wherein, n and d all are natural numbers, and n is the numbering of current subframe, and d determined according to the processing time that is generated described ULSC order by described reception signal.
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| CN101150337A (en) * | 2006-09-19 | 2008-03-26 | 大唐移动通信设备有限公司 | Closed power and synchronized control method and system |
| CN101188450A (en) * | 2006-11-16 | 2008-05-28 | 大唐移动通信设备有限公司 | Method and device for identifying deviation control command in TD-SCDMA |
| CN101388722A (en) * | 2008-11-03 | 2009-03-18 | 广州市新邮通信设备有限公司 | Uplink synchronization method, base station and customer equipment |
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| CN101150337A (en) * | 2006-09-19 | 2008-03-26 | 大唐移动通信设备有限公司 | Closed power and synchronized control method and system |
| CN101188450A (en) * | 2006-11-16 | 2008-05-28 | 大唐移动通信设备有限公司 | Method and device for identifying deviation control command in TD-SCDMA |
| CN101388722A (en) * | 2008-11-03 | 2009-03-18 | 广州市新邮通信设备有限公司 | Uplink synchronization method, base station and customer equipment |
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