CN201063813Y - User facility - Google Patents
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- CN201063813Y CN201063813Y CNU2006201671593U CN200620167159U CN201063813Y CN 201063813 Y CN201063813 Y CN 201063813Y CN U2006201671593 U CNU2006201671593 U CN U2006201671593U CN 200620167159 U CN200620167159 U CN 200620167159U CN 201063813 Y CN201063813 Y CN 201063813Y
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Abstract
The utility model discloses a wireless communication system for sending the initial transmission after the switching from the cell of origin/Node-B of E-UTRAN to the cell of destination/Node-B of the evolved universal terrestrial radio access network (E-UTRAN) to adjust transmission timing of up link. In one embodiment, the user equipment (UE) auto-calculates and uses the time advance (TA) based on the current cell of origin/Node-B timing and the relative time difference between the measuring result of cell/Node-B beacon channel reference signal and cell of origin and destination/ Node-B. In another embodiment, the UE sends the despatch request message with a TA value for the calculation of the transmission timing of up link or the real time data packet to E-UTRAN through the preallocated wireless resource based on the non-competitive up link. And in an optional embodiment, the UE sends the despatch request message with a TA value for the new calculation of the transmission timing of up link to E-UTRAN through the synchronizing random access channel (RACH).
Description
Technical field
The utility model relates to wireless communication system.More specifically, the utility model relates in Long Term Evolution (LTE) system after the Node-B (eNB) of cell-of-origin/evolution switches to purpose sub-district/eNB, is used for the timing adjustment process of the transfer of data between the synchronous radio transmitter/receiver unit (WTRU) (being subscriber equipment (UE)) and purpose sub-district/eNB immediately.
Background technology
The purpose of the general land wireless access (E-UTRA) of evolution and the universal terrestrial access network (E-UTRAN) of evolution is to develop a kind of Radio Access Network (RAN), and what be used to provide high data rate, low latency and optimize grouping improves power system capacity and covering.Fig. 1 illustrates the wireless communication system 100 that comprises at least one sub-district/Node-B 105, and wherein said sub-district/Node-B 105 communicates by letter with at least one UE 110.In order to achieve this end, consider the evolution of wave point and wireless network architecture, for example Long Term Evolution (LTE) system.Yet, in the LTE system, there is not existing dedicated channel, therefore on shared and common signal channel, provide all services.In addition, in the LTE system, System Frame Number-System Frame Number (SFN-SFN) may be unavailable.Therefore, can be created in synchronous communication problem between UE 110 and the sub-district/Node-B 105 between the transfer period in the LTE system.
Timing advance (TA) makes UE 110 send its UL pulse (burst) before the beginning of knowing up link (UL) time slot that is used to transmit, thereby can accurately detect and minimize or the time window of erasure signal decay in, receive the UL pulse at sub-district/Node-B 105.Single channel frequency division multiple access (SC-FDMA) is to have UL required high performance new wireless access technology synchronously.Therefore, in LTE UL transmission, suitable and accurate TA is very important.
Utilize the minimum delay (being even more important for the time-sensitive sex service of for example IP-based voice (VoIP) and interactive game etc.) to keep under the situation of shared channel connectivity or the synchronous PRACH of use in purpose sub-district/Node-B 105 at UE 110, switching need be regulated TA for UE 110.The LET system needing should avoid asynchronous Random Access Channel (RACH) to insert pulse to set up TA between transfer period, this is because this process has increased the delay during the connection in setting up the purpose sub-district, and does not also effectively use physical resource with respect to the UL shared channel.In third generation partner plan (3GPP), realize TA between transfer period by measuring SFN-SFN timing difference between the old and new Radio Link related with old and new Node-B.Yet, in the LTE system, between transfer period, do not have the new radio link set parallel, and may not have the SFN-SFN that is used for the timing difference measurement with old Radio Link.Therefore, in the LTE system, expectation obtains to have the TA of less delay between transfer period.
In the SC-FDMA system, TA is very important, to realize acceptable performance requirement.Because UE 110 must realize the quick synchronous communication with sub-district/Node-B 105 after the switching of implementing networking command, and UE 110 must realize that the fast cell selection to keep the service quality (QoS) of satisfaction, can go wrong like this between transfer period.Non-synchronous transmissions can produce height UL and disturb, and systematic function therefore offsets.Therefore, the quick timing regulation mechanism to transmitting synchronous is very favourable for LTE immediately after switching.
Because do not set up dedicated channel in the LTE system, so only use shared channel, this is difficult to keep synchronous closely.Therefore, must use other channel of for example asynchronous main PACH (PRACH) to carry out the switching that UE 110 arrives new sub-district/Node-B with the TA that obtains between two sub-district/Node-B.By use the asynchronous PRACH that regularly regulates after switching, UE 110 is necessary through the access procedure based on competition, thereby sub-district/Node-B 105 can successfully detect the PRACH sequence, then suitable TA signal is sent to UE 110.Unnecessary delay this causes setting up shared channel and connects in purpose sub-district/Node-B during.Therefore, response between transfer period regularly regulation mechanism will very favourable for LTE, with the demand (promptly avoiding switching " intercourse ") of the asynchronous RACH access procedure of avoiding producing delay.
Therefore, if exist a kind of during the hand-off process about being used to synchronous communication between UE 110 and the sub-district/Node-B105 adjustment process regularly, and do not have the restriction of legacy system, then will be very favourable.
The utility model content
The utility model relates to a kind of wireless communication system, is used for when sending the purpose sub-district of initial transmission to E-UTRAN/Node-B immediately after the cell-of-origin of E-UTRAN/Node-B switches the adjusting uplink transmit timing.According to an execution mode of the present utility model, UE is based on the beacon channel reference signal that receives from cell-of-origin/Node-B and Target cell/Node-B and the knowing of relative time difference (if there is) between cell-of-origin/Node-B and the purpose sub-district/Node-B and calculate and use the TA value automatically.In another embodiment, UE via before switching from purpose sub-district/Node-B to the cell-of-origin/the Node-B agreement and keep preallocated based on non-competing uplink radio resources, the scheduling request information or the real time data that send the TA value with the calculating that is used for the UL transmit timing are divided into groups to E-UTRAN.In optional execution mode, UE sends the scheduling request information of the TA value with the new calculating that is used for the UL transmit timing to E-UTRAN via synchronous RACH.Then, E-UTRAN calculates accurate (being more accurate) TA value in response to this scheduling request information, if necessary, E-UTRAN should accurate TA value be sent to UE, and was distributed in UL to be used among purpose sub-district/Node-B and/or down link (DL) Radio Resource for UE.If described accurate TA value is sent out, then after the EUTRAN signaling in having handled the purpose sub-district, UE uses this accurate TA value and the transmission of assigned radio resource log-on data.
Description of drawings
The example that provides in conjunction with the drawings can obtain more detailed understanding to the description of following the utility model preferred embodiment, wherein:
Fig. 1 illustrates legacy wireless communication system, and it comprises at least one Node-B that communicates by letter with at least one UE;
Fig. 2 illustrates according to the utility model and comprises UE and the wireless communication system with E-UTRAN of cell-of-origin/Node-B, purpose sub-district/Node-B;
Fig. 3 implements the flow chart that self-timing shifts to an earlier date the LTE handoff procedure according to execution mode of the utility model in the system of Fig. 2 by using preallocated Radio Resource to insert purpose sub-district/Node-B; With
Fig. 4 implements the flow chart that self-timing shifts to an earlier date the LTE handoff procedure according to another execution mode of the utility model in the system of Fig. 2, wherein use synchronous RACH visit to insert purpose sub-district/Node-B in described system.
Embodiment
When hereinafter quoting, term " subscriber equipment (UE) " includes but not limited to wireless transmitter/receiver unit (WTRU), mobile radio station, fixing or moving user unit, beep-pager, cell phone, PDA(Personal Digital Assistant), computer or any other type of user equipment that can move in wireless environment.
When hereinafter quoting, term " sub-district/Node-B " includes but not limited to sub-district and/or Node-B, LTE eNB, sub-district and/or base station, site controller, access point (AP) or any other style interface connection device that can move in wireless environment.
There is dissimilar switchings in arbitrary it will be understood by those skilled in the art that, for example switches between inner switching of Node-B and the Node-B.Under the inner situation about switching of Node-B, because switch between two sub-districts that occur among the Node-B, occur in from the cell-of-origin to the purpose sub-district so switch, be in common Node-B but switch, and do not occur in the switching from source Node-B to purpose Node-B.And under situation about switching between the Node-B, switching occurs as a sub-district (being the cell-of-origin) to another sub-district that belongs to purpose Node-B (being the purpose sub-district) that is subordinated to source Node-B.In this case, term " sub-district " and " Node-B " can exchange.Can be applicable to two kinds of situations from the cell-of-origin to the switching of purpose sub-district.When cell-of-origin and purpose sub-district were all supported by common Node-B, these sub-districts were synchronized with each other probably.
Can utilize application-specific integrated circuit (ASIC) (ASIC) to implement the utility model.The utility model is applicable to RRM that is used for WTRU, base station, network or system (RRM) and the radio resource controller in physical layer, (digital baseband) or network layer, as software or digital signal processor (DSP).The utility model is suitable for following air interface: Wideband Code Division Multiple Access (WCDMA) (WCDMA), frequency division multiplexing (FDD), CMDA2000 (1x evolution-only data (1xEV-DO), 1x evolution data and voice (1xEV-DV)), CDMA, the UL of enhancing, high-speed downlink packet insert (HSDPA) and based on the LTE system.
For Node-B inside/between the situation of two kinds of switchings, the utility model relates to the LTE_Active state.The utility model provides a kind of method and process, can measure and calculate the TA value automatically by this method and process UE, thus application of synchronized transmission immediately in the purpose sub-district of switching subsequently.Therefore, can avoid in the purpose sub-district application to the asynchronous PRACH process of upgrading the TA value.
Under non-switch instances, determine the TA value by E-UTRAN, and where necessary the TA regulated value is sent to UE from the UL transmission.When (promptly current) sub-district/Node-B occurring to the switching of purpose (being new) sub-district/Node-B from the source, UE can use preallocated UL based on non-competing Radio Resource or the synchronous RACH that is used for inserting purpose sub-district/Node-B be identified for the TA value that begins to transmit at purpose sub-district/Node-B automatically.Otherwise, if do not regulate TA, then in purpose sub-district/Node-B, do not use the TA value, and asynchronous PRACH process must be used for first transmission of purpose sub-district for the purpose sub-district.
If use absolute TA signaling, then E-UTRAN must always be informed in the TA value of using among the UE.When determining the TA of new calculating automatically by UE, UE must report this TA after regulating automatically.May for E-UTRAN the TA of this use of request in measurement report also.In case finish switching, then utilize name (nominal) TA process once more.If use relative TA signaling, the TA that then there is no need will newly calculate carried out automatic TA adjusting by UE after is sent to E-UTRAN.
According to the utility model, switch and to refer in particular between synchronized cells/Node-B or the direct-cut operation between the sub-district/Node-B of known relative time difference.The utility model provides the automatic TA measurements and calculations of UE method, and is used for the process that LTE switches, to realize the having synchronous communication that reduces delay and less interference.Knowing of relative time difference (if there is) between cell-of-origin/Node-B and the purpose sub-district/Node-B should be sent to UE, the TA value that makes new advances with calculating.In a preferred embodiment, the indication synchronized with each other of relative time difference or sub-district is sent out in switching command.
Available according to which TA information element (IE) in Radio Resource control (RRC) order, during hand-off process, can use from the preallocated UL of purpose sub-district/Node-B based on non-competing Radio Resource or RACH synchronously, to insert purpose sub-district/Node-B.Alternatively, which in two access functions E-UTRAN determine to use.UE by measure from different sub-districts/ reference signal on beacon channel that Node-B receives calculates the timing difference from source and destination sub-district/Node-B.Then, UE determines TA automatically, to be applied to the UL transmission of new purpose sub-district/Node-B between transfer period, to avoid asynchronous PRACH process demand.UE can use the distribution UL channel with TA to be used for the direct transmission of resource request, perhaps can use the synchronous RACH that is used for resource request, begins transfer of data then after the allocation of radio resources of finishing from purpose sub-district/Node-B.When E-UTRAN indication UE switches to new purpose sub-district/Node-B, E-UTRAN will indicate UE to use the TA of calculating in new sub-district/Node-B.Under all other situations, be that E-UTRAN determines the TA value.This has been avoided need be to the demand of the asynchronous RACH access procedure of purpose sub-district/Node-B, or the report cell-of-origin/Node-B SFN-SFN related with the E-UTRAN switching command.
Fig. 2 illustrates the wireless communication system 200 according to UE of comprising 205 of the present utility model and E-UTRAN 210.E-UTRAN 210 comprises cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220.
Measure at the automatic TA of the UE of LTE between transfer period
If UE 205 carries out automatic TA between transfer period, then UE 205 must determine the value that the one way propagation of UE 205 postpones.Make L represent radio frames length, t
iBe illustrated in the clock time of sub-district/Node-Bi, p
i205 one way propagation postpones () from sub-district/Node-Bi to UE in expression
LThe module arithmetic of L is pressed in expression.Because by Cell searching, UE 205 is only known (t
i)
LAnd, and UE 205 not have the p of sub-district/Node-Bi of connection
iSo UE 205 must be known (t
i)
LOr p
i, to obtain other.
Suppose that the distance between UE 205 and sub-district/Node-Bi is D
iUE 205 is that thick meter (coarse) DL that sub-district/Node-Bi (in first cell search procedure) detects regularly is (t
i)
L+ p
i+ τ
DL, τ wherein
DLFor generation is used for the regularly multipath of the peak value of detection.Therefore, propagation delay p
i=D
i/ c is not subjected to frequency influence.τ
DLComponent depends on frequency and environment.After accurate regularly detection, (second or third step of Cell searching) can obtain postponing to the small part multipath.
Make
Expression is less than τ
DLThe residue multipath postpone.Then, accurate DL regularly becomes
If
Very little, can prove regularly ≈ (t of accurate DL
i)
L+ p
i, itself and frequency-independent.Can suppose, in following analysis temporarily
Very little.
For other UE that makes that UE 205 distributes to its UL transmission at sub-district/Node-Bi, then UE 205 needs to press 2p
iAmount carry out TA.By this way, receive the signal of the UL transmission of UE 205, provide by following formula in the time of RT (i):
1) RT (i)=(t
i)
L+ p
i-2p
i+ p
i+ τ
UL=(t
i)
L+ τ
UL, equation (1)
Wherein, τ
ULBe maximum multipath delay among the UL, and also depend on frequency.
In the OFDMA system, use cycle period (CP), to avoid the interference between the time slot.Therefore, the effect of CP is as monitoring period.(it covers τ in the use of CP
ULLength) guarantee that UL receives the signal from UE, wherein said signal is assigned with immediately, and keeps orthogonality each other.
According to preferred implementation, there are two kinds of selections, calculate with the TA that is implemented in UE 205.
A kind of selection, (at present in LTE hypothesis) be not if there be cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220 among the synchronous E-UTRAN 210, then signal to UE when switching to purpose sub-district/Node-Bj as cell-of-origin/Node-Bi, cell-of-origin/Node-Bi is by time clock correction length the delivery ((t frame by frame between cell-of-origin/Node-Bi and the purpose sub-district/Node-Bj
j-t
i)
L) and send to UE 205.If known (t
j)
L, p then
iCan obtain.If sub-district/Node- B 215 and 220 is synchronous, then (t
i)
L=(t
j)
LAlso obtained TA.
Another kind of selection, the signal strength signal intensity of UE 205 measuring basis signals (pilot tone), synchronizing channel (SCH) or other DL channel.Based on this measurement result, UE 205 determines the distance of the purpose sub-district/Node-B 220 from E-UTRAN 210, and calculated transmission delay.Yet, can know usually, can not draw accurate and reliable distance from signal strength signal intensity or path loss measurement result.By being collected in the measurement result in long-time section, signal strength signal intensity fluctuates with the decay that can reduce (but not eliminating).
Regulate in order to calculate TA, the relative time difference that must send between source and destination sub-district/Node-B arrives UE, and it is synchronous perhaps must notifying the UE sub-district.
The automatic TA process of UE in LTE switches
When switching command from E-UTRAN 210 is led in reception, when perhaps the fast cell of cooperation is selected between UE 205 and cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220, start the automatic TA process of UE.UE 205 is poor detection time after receiving from the reference signal of the beacon channel of cell-of-origin/Node-B 215 and purpose sub-district/Node-B220.When switching to purpose sub-district/Node-B 220, time offset is added into final TA value among cell-of-origin/Node-B 215.
With reference to Fig. 2, UE 205 uses from the reference signal of the beacon channel of the reference signal of the beacon channel of cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220 and infers poor in the scope between UE 205 and source and destination sub-district/Node-B 215 and 220.Reference signal can be the signal with any type of datum characteristic.Then, regulate cell-of-origin TA by the relative mistake between the reference signal of source and destination sub-district, UE 205 can determine the amount of TA automatically, to be applied to purpose sub-district/Node-B 220 between transfer period.Beacon channel can be broadcast channel, synchronizing channel (SCH) etc.
Fig. 3 is a flow chart of implementing the automatic TA LTE of UE handoff procedure 300 according to the utility model in the system 200 of Fig. 2.In step 305, in cell-of-origin/Node-B 215 of E-UTRAN 210, make UE 205 TA can with and be performed.In step 310, E-UTRAN measures and calculates the TA value, and the TA value signal is transferred to UE 205.In step 315, when transferring to cell-of-origin/Node-B215, UE 205 uses the TA value of steps 310.By using this TA value, UE 205 can regulate its UL transmit timing.In step 320, E-UTRAN 210 determines when the switching of execution from cell-of-origin/Node-B 215 value purpose sub-district/Node-B 220.When E-UTRAN in step 320 210 determined to carry out switching, cell-of-origin/Node-B 215 of E-UTRAN 210 sent switching command message 225 (being the RRC signaling) to UE 205, to start the switching (step 325) of UE 205.Indication or sub-district that switching command message 225 is included in the relative time difference between the source and destination sub-district are synchronous indications, and may comprise the preallocated UL wireless resource information of the initial transmission 230 that is used to be established to purpose sub-district/Node-B 220.Can infer automatic TA process significantly or impliedly from switching command message 225.By using from the preassignment UL Radio Resource of purpose sub-district/Node-B 220 or by the synchronous RACH of use, switching command message 225 makes that the initial transmission from UE 205 to purpose sub-district/Node-B 220 230 starts between transfer period.When the initial transmission 230 of purpose sub-district/Node-B 220 is used preassignment UL Radio Resources, the information that relates to preassignment UL Radio Resource is comprised in the switching command message 225.This RRC signaling also can be indicated should use the automatic TA metering system of different non-UE between transfer period.In this case, handle if do not need the automatic TA of UE205 to regulate, then must be significantly or impliedly specify the RRC signaling.
Still with reference to Fig. 2 and 3, in step 330, UE 205 carries out one or many and measures, and determines transmission delay differences between cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220 with the reference signal of transmitting on the beacon channel based on cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220.In step 335, the knowing or be to know synchronous (promptly do not exist between cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220 tangible relative time poor) to cell-of-origin/Node-B 215 and purpose sub-district/Node-B 220 of relative time difference between the measurement result that UE 205 carries out based on current cell-of-origin TA value, in step 330 and cell-of-origin/Node-B 215 and the purpose sub-district/Node-B 220 calculates new TA value automatically.In step 340, UE205 use by the indicated preallocated up link of switching command message 225 based on non-competing Radio Resource or synchronously RACH send initial transmission 230 to the purpose sub-district/during Node-B 220, use new TA value to regulate the UL transmit timing.
There are two selections, between transfer period, visit purpose sub-district/Node-B 220 to use preassignment UL wireless resource information.The selection of UE 205 is to use preassignment UL Radio Resource by sending resource request message and/or business datum to purpose sub-district/Node-B 220.In this case, purpose sub-district/Node-B 220 must respond and have new distributing radio resource and support to the UE 205 of the accurate T A value (if necessary) of the subsequent data of purpose sub-district/Node-B220 transmission 230.Other selection is to use the preassignment UL Radio Resource that comprises in the switching command message 225 that is used for the immediate data transmission.For above two kinds of selections, for the various objectives of between transfer period, using, the amount difference of preassignment Radio Resource.Be chosen in to be included in the DL RRC signaling or to be included in the above-mentioned switching command message 225 during the call setup and be sent to UE 205 what do from E-UTRAN 210.In such operating period, under the situation that does not need asynchronous RACH access procedure, after switching, be implemented to the synchronous adjusting of UL transmit timing of purpose sub-district/Node-B 220 immediately.
Alternatively, using under the situation of absolute TA value, for UE 205 be necessary send initial transmission 230 to the purpose sub-district/during Node-B 220 report automatically the TA value of calculating to purpose sub-district/Node-B 220.Under the situation of using relative TA value signaling, UE 205 does not need to notify what purpose sub-district/Node-B 220 new TA are.
At the synchronous RACH access procedure of LTE between transfer period
Fig. 4 is the flow chart that inserts LTE handoff procedure 400 according to the synchronous RACH of another execution mode of the utility model.After UE calculates the timing advance value automatically (step 405), UE sends scheduling (being resource), the request message E-UTRAN 210 (step 410) to the TA value that calculates with use by synchronous RACH channel.In step 415, E-UTRAN 210 is based on accurate (being more accurate) the TA value of the information calculations the scheduling request information that receives from UE 205.If necessary, E-UTRAN 210 sends accurate TA value to UE 205 in the DL signaling message, and is used in UL and/or the DL Radio Resource (step 420) of UE 205 for sub data transmission subsequently.In step 425, UE 205 comes the log-on data transmission by the UL/DL Radio Resource that uses accurate TA value and distribute.
Although described feature of the present utility model and element in a preferred embodiment with particular combinations, but each feature and element can use separately under the situation of further feature that does not have preferred embodiment and element, perhaps can use further feature of the present utility model and element to use or do not use further feature of the present utility model and element with various combinations.Method that provides in the utility model or flow chart can be to implement in computer program, software and the firmware on computer-readable recording medium contacting physical features, to be carried out by all-purpose computer or processor.The example of computer-readable recording medium comprises read-only memory (ROM), random access storage device (RAM), register, buffer storage, semiconductor storage unit, magnetizing mediums (for example internal hard drive and moveable magnetic disc), magnet-optical medium and light medium (for example CD-ROM dish and digital versatile disc (DVD)).
Suitable processor comprises, for example: general processor, application specific processor, conventional processors, digital signal processor (DSP), a plurality of microprocessor, one or more and related microprocessor, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) circuit, any other type integrated circuit (IC) and/or the state machine of DSP nuclear.
Can be used for being implemented in the wireless frequency transceiver that uses in wireless transmission receiving element (WTRU), subscriber equipment (UE), terminal, base station, radio network controller or any main frame with the processor of software context.WTRU can combine and use with module, and in hardware and/or software, implement, for example camera, video camera module, visual telephone, speakerphone, vibratory equipment, loud speaker, microphone, TV transceiver, hand-free receiver, keyboard, bluetooth module, frequency modulation(FM) (FM) radio-cell, LCD (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, digital music player, media player, video-game player module, Internet-browser and/or any wireless lan (wlan) module.
Claims (3)
1. subscriber equipment is characterized in that described subscriber equipment comprises:
Antenna is used for sending and received signal by wireless medium; With
Wireless transmitter/receiver unit, described wireless transmitter/receiver unit and described antenna couple and comprise:
Receive the device of switching command message, described switching command message shows to carry out in time and switches to the purpose sub-district from the cell-of-origin;
Automatic computing equipment in response to receiving described switching command message with the initial timing advance value of automatic calculating, thereby is applied to described purpose sub-district in ul transmissions;
Dispensing device is used to send the scheduling request information that comprises the described initial timing advance value that calculates; With
The device of receiving downlink signaling message, described downlink signaling message comprise than described initial timing advance value more accurately accurate timing be worth in advance.
2. subscriber equipment is characterized in that described subscriber equipment comprises:
Antenna is used for sending and received signal by wireless medium; With
Wireless transmitter/receiver unit, described wireless transmitter/receiver unit and described antenna couple and comprise
Receive the device of switching command message, described switching command message shows that the Node-B (eNB) that carries out in time from source evolution switches to purpose eNB;
Automatic computing equipment in response to receiving described switching command message with the initial timing advance value of automatic calculating, thereby is applied to described purpose eNB in ul transmissions;
Dispensing device is used to send the scheduling request information that comprises the described initial timing advance value that calculates; With
The device of receiving downlink signaling message, described downlink signaling message comprise than described initial timing advance value more accurately accurate timing be worth in advance.
3. system according to claim 2, it is characterized in that described E-UTRAN sends accurate timing advance value to WTRU in downlink signaling message, E-UTRAN is that subsequently transfer of data is distributed by WTRU used up link and/or downlink radio resource, and WTRU uses the up link of described accurate timing advance value and distribution and/or downlink radio resource to send initial transmission to purpose sub-district/eNB.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75312405P | 2005-12-22 | 2005-12-22 | |
| US60/753,124 | 2005-12-22 | ||
| US60/839,267 | 2006-08-21 |
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| CN201063813Y true CN201063813Y (en) | 2008-05-21 |
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| CN102573011A (en) * | 2012-02-17 | 2012-07-11 | 大唐移动通信设备有限公司 | Access control method and equipment |
| CN103081555A (en) * | 2010-03-12 | 2013-05-01 | 捷讯研究有限公司 | Base station and method for receiving transmissions on an enhanced random access channel |
| WO2013182152A1 (en) * | 2012-10-29 | 2013-12-12 | 中兴通讯股份有限公司 | Method and device for processing scheduling request in switching scenario |
| CN105075146A (en) * | 2013-01-07 | 2015-11-18 | 三星电子株式会社 | Methods and apparatus for inter-enb carrier aggregation |
| CN105407531A (en) * | 2015-12-28 | 2016-03-16 | 魅族科技（中国）有限公司 | Communication method and communication device in wireless local area network, access point and site |
| WO2017202267A1 (en) * | 2016-05-23 | 2017-11-30 | 中兴通讯股份有限公司 | Method and apparatus for acquiring uplink timing |
| CN109891957A (en) * | 2016-10-28 | 2019-06-14 | 瑞典爱立信有限公司 | The timing advance of UE compensation |
| CN110546988A (en) * | 2017-02-02 | 2019-12-06 | 高通股份有限公司 | Low or zero millisecond mobility interrupts based on downlink data coordination |
| WO2020073258A1 (en) * | 2018-10-10 | 2020-04-16 | Oppo广东移动通信有限公司 | Synchronization indication method, terminal device and network device |
| US10966195B2 (en) | 2010-03-12 | 2021-03-30 | Blackberry Limited | Communication stations and methods for transmitting on a random access channel |
| CN112654083A (en) * | 2019-10-09 | 2021-04-13 | 华硕电脑股份有限公司 | Method and apparatus for timing advance verification in a wireless communication system |
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2006
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