CN102318415A - Facilitating uplink synchronization in TD-SCDMA multi-carrier systems - Google Patents
Facilitating uplink synchronization in TD-SCDMA multi-carrier systems Download PDFInfo
- Publication number
- CN102318415A CN102318415A CN2011800001954A CN201180000195A CN102318415A CN 102318415 A CN102318415 A CN 102318415A CN 2011800001954 A CN2011800001954 A CN 2011800001954A CN 201180000195 A CN201180000195 A CN 201180000195A CN 102318415 A CN102318415 A CN 102318415A
- Authority
- CN
- China
- Prior art keywords
- frequency
- uplink
- carrier
- scdma
- transmit timing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Uplink synchronization processes in multi-carrier time division-synchronous code division multiple access (TD-SCDMA) systems include determining uplink transmission timing for a first carrier frequency and performing uplink synchronization on the other carrier frequencies based on the transmission timing of the first carrier frequency. The transmission timing may be adjusted based on a timing offset that is measured between the received downlink pilot signals of the various carrier frequencies. User equipment may perform uplink synchronization individually with each of the carriers serviced by a particular Node B after receiving synchronization information regarding those carrier frequencies.
Description
The cross reference of related application
That the application requires to advocate is that on April 7th, 2010 submitted to, application number be 61/321,680, with the priority of the U.S. Provisional Patent Application of people's such as CHIN name application, clearly incorporate the mode that the disclosure of this application is quoted in full into the application.
Technical field
Put it briefly, some aspects of the application relate to wireless communication system, and more specifically, relate to the uplink synchronisation that promotes in the TD-SCDMA multicarrier system.
Background technology
Cordless communication network is disposed so that the various communication services such as speech, video, data, message are sent, broadcasted to be provided widely.These networks are multi-access network normally, and it can be supported to a plurality of user's communications through sharing available network resources.An example of this type network is universal land radio access web (UTRAN).UTRAN is the wireless access network (RAN) that is defined as the part of Universal Mobile Telecommunications System (UMTS), and UMTS is the third generation (3G) the mobile phone technology of being supported by third generation partner program (3GPP).As the successor of global system for mobile communications (GSM) technology, UMTS supports such as broadband-code division multiple access (W-CDMA), TD-CDMA Time Division-Code Division Multiple Access (TD-CDMA) and the so various air-interface standards of Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) at present.For example, China is utilizing its existing GSM infrastructure to carry out TD-SCDMA as the basic air interface in the UTRAN framework as core net.UMTS also supports the enhancement mode 3G data communication protocol such as high-speed downlink packet inserts (HSPDA), and HSPDA is that the UMTS network that is associated provides higher data transmission speed and data transmission capacity.
Along with sustainable growth to the mobile broadband access demand, be not only in order to satisfy growing demand the mobile broadband access, also be to continue promoting the UMTS development of technology in order to promote and to strengthen the user experience of using mobile communication, researching and developing.
Summary of the invention
Aspect of the application; A kind of method that is used for the uplink synchronisation of multi-carrier TD-SCDMA system comprises: confirm uplink transmit timing to the first frequency in the said multi-carrier TD-SCDMA system, and based on carrying out uplink synchronisation on the auxilliary frequency of at least one in said multi-carrier TD-SCDMA system of determined said uplink transmit timing.Should be noted in the discussion above that the purpose for the application, term " auxilliary frequency " means other frequency, rather than is intended to express the hierarchical relationship of any kind of itself and said first frequency.
Aspect the application's another one, a kind of subscriber equipment is configured in multi-carrier TD-SCDMA system, carry out uplink synchronisation.This subscriber equipment comprises: be used for confirming module to the uplink transmit timing of the first frequency of said multi-carrier TD-SCDMA system, and the module that is used for carrying out at least one auxilliary frequency of said multi-carrier TD-SCDMA system based on determined said uplink transmit timing uplink synchronisation.
Aspect the application's another one, a kind of computer program has the computer-readable medium of the code that has program stored therein on it.This program code comprises: be used for confirming code to the uplink transmit timing of the first frequency of said multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system, and the code that is used for carrying out at least one auxilliary frequency of said multi-carrier TD-SCDMA system based on determined said uplink transmit timing uplink synchronisation.
Aspect the application's another one, a kind of subscriber equipment is configured to be used for the radio communication of multi-carrier TD-SCDMA system.This subscriber equipment comprises at least one processor and the memory that is coupled to said processor.Said processor is configured to confirm to be directed against the uplink transmit timing of the first frequency in the said multi-carrier TD-SCDMA system, and based on carrying out uplink synchronisation on the auxilliary frequency of at least one in said multi-carrier TD-SCDMA system of determined said uplink transmit timing.
Aspect the application's another one, a kind of method that is used for the uplink synchronisation of multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system comprises: send to the synchronizing information by each frequency in a plurality of carrier frequencies of said Target cell service to Target cell.Said synchronizing information is received from the cell-of-origin by subscriber equipment.Said method further comprises: receive physical access channel (FPACH) confirmation signal (ACK) that joins with each frequency dependence; Obtain single transmit timing value from the said FPACH ACK that is received, and on by each carrier frequency in said a plurality of carrier frequencies of said Target cell service, carry out uplink synchronisation individually to each frequency.
Aspect the application's another one, a kind of subscriber equipment is configured to be used for the uplink synchronisation of multi-carrier TD-SCDMA system.This subscriber equipment comprises: the module that is used for sending to Target cell the synchronizing information of each frequency that is directed against a plurality of carrier frequencies of being served by said Target cell; Said synchronizing information receives from the cell-of-origin; Be used to receive the module of the FPACH ACK that joins with each frequency dependence; Be used for obtaining module to the single transmit timing value of each carrier frequency from the said FPACH ACK that is received, and the module that is used on each carrier frequency by said Target cell service, carrying out individually uplink synchronisation.
Aspect the application's another one, a kind of computer program has the computer-readable medium of the code that has program stored therein on it.This program code comprises: the code that is used for sending to Target cell the synchronizing information of each frequency that is directed against a plurality of carrier frequencies of being served by said Target cell; Said synchronizing information receives from the cell-of-origin; Be used to receive the code of the FPACH ACK that joins with each frequency dependence; Be used for obtaining code to the single transmit timing value of each frequency from the said FPACH ACK that is received, and the code that is used on each carrier frequency by said Target cell service, carrying out individually uplink synchronisation.
Aspect the application's another one, a kind of subscriber equipment is configured to be used for the radio communication of multi-carrier TD-SCDMA system.This subscriber equipment comprises at least one processor and the memory that is coupled to said processor.Said processor is configured to send to the synchronizing information by each frequency in a plurality of carrier frequencies of said Target cell service to Target cell.Said synchronizing information is received from the cell-of-origin by subscriber equipment.Said subscriber equipment also is configured to: receive the FPACH ACK that joins with each frequency dependence; Obtain single transmit timing value from the said FPACH ACK that is received, and on each carrier frequency, carry out uplink synchronisation individually by said Target cell service to each frequency.
Description of drawings
Fig. 1 is the block diagram that the example of telecommunication system conceptually is shown.
Fig. 2 is the block diagram that the example of the frame structure in the telecommunication system conceptually is shown.
Fig. 3 is the block diagram that is conceptually illustrated in the example of the Node B that communicates with subscriber equipment (UE) in the telecommunication system.
Fig. 4 is the block diagram that the carrier frequency in the multi-carrier TD-SCDMA communication system is shown.
Fig. 5 illustrates the functional block diagram that is performed with the exemplary block of an embodiment realizing the application.
Fig. 6 is the signal flow graph in the multi-carrier TD-SCDMA communication system that disposes of an aspect according to the application.
Fig. 7 is the signal flow graph in the multi-carrier TD-SCDMA communication system that disposes of an aspect according to the application.
The call flow diagram of the call flow during the direct-cut operation in the TD-SCDMA system that the aspect according to the application that shows Fig. 8 disposes.
Embodiment
Be intended to as description below in conjunction with the given detailed description of accompanying drawing, and be not the only configuration that is intended to represent to realize notion described herein various configurations.For the purpose to the thorough of each conception of species is provided, detailed description has comprised detail.Yet, to those skilled in the art, be apparent that, also can not use these details to realize these notions.In some cases, it is fuzzy to avoid these notions are caused with the form of block diagram known structure and assembly to be shown.
Forward Fig. 1 now to, it has showed the block diagram of the example that telecommunication system 100 is shown.Running through each given conception of species of the application can realize in various telecommunication systems, the network architecture and communication standard.As giving an example rather than limiting, the application's shown in Fig. 1 various aspects are that the UMTS system that consults and uses the TD-SCDMA standard provides.In this example, the UMTS system comprises RAN (wireless access network) 102, and (for example, UTRAN), it provides the various wireless services that comprise speech, video, data, message transmission, broadcasting and/or other service.Can RAN 102 be divided into a plurality ofly such as the such wireless network subsystem (RNS) of RNS 107, each RNS is by controlling such as the such wireless network controller (RNC) of RNC106.For the sake of clarity, only show RNC 106 and RNS 107; Yet except RNC 106 and RNS 107, RAN 102 can comprise the RNC and the RNS of arbitrary number.Except the others of RNC 106, the device that RNC 106 still is a kind of responsible distribution, reconfigure and discharge the Radio Resource in the RNS 107.RNC 106 can use any suitable transmission network through the various types of interfaces such as direct physical connection, virtual net etc. and other RNC (not shown) interconnection among the RAN 102.
The geographic area that is covered by RNS 107 can be divided into a plurality of sub-districts, wherein uses wireless transceivers devices to each sub-district service to be provided.Wireless transceivers devices is commonly called Node B (Node B) in UMTS uses, but also possibly is called base station (BS), base transceiver station (BTS), wireless base station, transceiver, transceiver function body, Basic Service Set (BSS), extended service set (ESS), access point (AP) or certain other suitable term by those skilled in the art.For the sake of clarity, show two Node B 108; Yet RNS 107 can comprise the radio node B of arbitrary number.Node B 108 is provided to the WAP of core net 104 for the mobile device of arbitrary number.The example of mobile device comprises cell phone, smart phone, Session Initiation Protocol phone, kneetop computer, notebook, net book, intelligence basis, PDA(Personal Digital Assistant), satellite radio devices, global positioning system (GPS) equipment, multimedia equipment, video equipment, digital audio-frequency player (for example, MP3 player), camera, game machine or any other similar function device.Mobile device is commonly called subscriber equipment (UE) in UMTS uses, but also possibly is called mobile radio station (MS), subscriber station, mobile unit, subscriber unit, radio-cell, remote unit, mobile device, wireless device, Wireless Telecom Equipment, remote equipment, mobile subscriber station, access terminal (AT), portable terminal, wireless terminal, remote terminal, cell-phone, terminal, user agent, mobile client, client or certain other suitable term by those skilled in the art.From illustrative purpose, show 3 UE 110 that communicate with Node B 108.Down link (DL) (also being called as forward link) refers to the communication link from the Node B to UE, and up link (UL) (also being called as reverse link) refers to the communication link from UE to the Node B.
In this example, core net 104 uses mobile switching centre (MSC) 112 and gateway MSC (GMSC) 114 to come the support circuit-switched service.One or more RNC (for example, RNC 106) can be connected to MSC 112.MSC 112 is a kind of devices that call setup, calling route and UE mobility functions are controlled.MSC 112 also comprises Visited Location Registor (VLR) (not shown), the user related information when VLR comprises during UE is positioned at the overlay area of MSC 112.GMSC 114 provides the gateway of place in circuit switching network 116 for UE through MSC 112.GMSC 114 comprises attaching position register (HLR) (not shown), and HLR comprises the user data such as the data of the details that reflects the service that the specific user has subscribed to.HLR also is associated with the authentication center (AuC) that comprises specific to user's verify data.When the calling that receives to particular UE, GMSC 114 inquiry HLR to be confirming the position of this UE, and with this call forward to the specific MSC that service is provided to this position.
Core net 104 also uses Serving GPRS Support Node (SGSN) 118 and Gateway GPRS Support Node (GGSN) 120 to support packet data service.Compare with those available speed of GSM circuit switched data service of standard, GPRS (expression general packet radio service) is designed to higher speed packet data service is provided.GGSN 120 provides the connection of going to packet-based network 122 for RAN 102.Packet-based network 122 can be internet, exclusive data networking or certain other suitable packet-based network.The major function of GGSN 120 is for UE 110 packet-based network connectivty to be provided.Through SGSN 118 transmission of data packets between GGSN 120 and UE 110, SGSN 118 is main in packet-based territory to carry out the performed function identical functions in circuit commutative field with MSC 112.
The UMTS air interface is spread spectrum direct sequence CDMA (DS-CDMA) system.PRBS pseudo-random bit sequence and the user data of spread spectrum DS-CDMA through will being called as chip multiplies each other user data launched on wideer bandwidth.The TD-SCDMA standard is based on this direct sequence spread spectrum skill, and requires time division duplex (TDD) in addition, rather than as the FDD that in the UMTS/W-CDMA system of many FDDs (FDD) pattern, uses.TDD uses identical carrier frequency to the up link (UL) between Node B 108 and the UE 110 with down link (DL), but ul transmissions and downlink transmission are divided into the different time-gap in this carrier wave.
Fig. 2 shows the frame structure 200 to the TD-SCDMA carrier wave.As shown in the figure, it is 10 milliseconds frame 202 that the TD-SCDMA carrier wave has length.Frame 202 has two 5 milliseconds subframe 204, and each subframe 204 comprises 7 time slot TS0 to TS6.First time slot TS0 is allocated for downlink communication usually, and second time slot TS1 is allocated for uplink communication usually.Remaining time slot (TS2 is to TS6) both can be used for up link also can be used for down link, and this makes the higher data transmission that makes progress at up link or downlink side allow greater flexibility period.Down link pilot timeslot (DwPTS) 206 (also being called as downlink (DwPCH)), protection period (GP) 208 and uplink pilot time slot (UpPTS) 210 (also being called as uplink pilot channel (UpPCH)) are between TS0 and TS1.TS0 can allow multiplexing transfer of data on maximum 16 sign indicating number channels to each time slot among the TS6.The transfer of data of sign indicating number on the channel comprise by in lead two data parts 212 that sign indicating number 214 separates and followed thereafter the protection period (GP) 216.In lead sign indicating number 214 characteristics that can be used for such as channel estimating, and the interference (inter-burst interference) of GP 216 between can being used to avoid happening suddenly.
Fig. 3 is the block diagram of the Node B 310 that in RAN 300, communicates with UE 350, and wherein, RAN 300 can be the RAN 102 among Fig. 1, and Node B 310 can be the Node B 108 among Fig. 1, and UE 350 can be the UE 110 among Fig. 1.In downlink communication, emission processor 320 can receive data and slave controller/processor 340 reception control signals from data source 312.Emission processor 320 provides the various signal processing functions to data and control signal and reference signal (for example, pilot signal).For example; Emission processor 320 can be provided for error-detecting the Cyclic Redundancy Check sign indicating number, be used to promote the coding of forward error correction (FEC) and interweave, (for example based on various modulation schemes; Two-phase PSK (BPSK), QPSK (QPSK), M phase phase shift keying (M-PSK) and M level quadrature amplitude modulation (M-QAM) etc.) the mapping to signal constellation (in digital modulation), the spread spectrum that uses Orthogonal Variable Spreading Factor OVSF (OVSF) to carry out, and multiply by mutually with scrambled code and to generate a series of symbol.Channel estimating from channel processor 344 can be used to confirm coding, modulation, spread spectrum and/or the scrambling scheme of emission processor 320 by controller/processor 340.These channel estimating can obtain from the reference signal of UE 350 emissions, perhaps from obtaining from leading the UE 350 in the feedback that is comprised among sign indicating number 214 (Fig. 2).The symbol that is produced by emission processor 320 is provided for frame emission processor 330 to create frame structure.Frame emission processor 330 through to symbol with come self-controller/processor 340 in lead sign indicating number 214 (Fig. 2) and carry out multiplexingly creating this frame structure, thereby produce a series of frame.These frames are provided for transmitter 332 subsequently, and this transmitter 332 provides and comprises amplification, filtering and these frames are modulated on the carrier wave to be used on wireless medium, carrying out downlink transmission in interior various signal conditioning functions through smart antenna 334.Smart antenna 334 can be controlled the bidirectional self-adaptive aerial array or other similar beam technique is realized with wave beam.
At UE 350 places, receiver 354 transmits through antenna 352 receiving downlinks, and handles this transmission to recover to be modulated at the information on the carrier wave.The information of being recovered by receiver 354 is provided for received frame processor 360; Lead sign indicating number 214 (Fig. 2) during received frame processor 360 each frame of parsing are also incited somebody to action and offer channel processor 394, and data-signal, control signal and reference signal are offered receiving processor 370.Then, receiving processor 370 carry out with Node B 310 in the performed opposite processing of processing of emission processor 320.More particularly, 370 pairs of symbols of receiving processor carry out descrambling and despreading, and confirm the most possible signal constellation point by Node B 310 transmissions based on modulation scheme subsequently.These soft-decisions can be based on the channel estimating that is calculated by channel processor 394.The decoded subsequently and deinterleaving of these soft-decisions is with restore data signal, control signal and reference signal.Then, check (CRC) codes is to confirm that whether these frames are by successfully decoding.The entrained data of frame of being decoded by success will be provided for data sink 372 subsequently, and these data sink 372 expressions are just operating in application program and/or the various user interface (for example, display) among the UE 350.The entrained control signal of frame of being decoded by success will be provided for controller/processor 390.When frame was not received machine processor 370 and successfully decodes, controller/processor 390 can also use affirmation (ACK) and/or NACK (NACK) agreement to support the repeat requests to those frames.
In up link, be provided for emission processor 380 from the data of data source 378 and the control signal of coming self-controller/processor 390.Data source 378 can represent just operating in application program and the various user interface (for example, keyboard, pointing device, orbit wheel etc.) among the UE 350.Be similar to the described function of downlink transmission that combination is undertaken by Node B 310; Emission processor 380 provides various signal processing functions, comprising: the CRC sign indicating number, help the coding of FEC and the spread spectrum that interweaves, carry out to the mapping of signal constellation (in digital modulation), use OVSF and scrambling to produce a series of symbol.That obtain from reference signal through channel processor 394 or can be used to select suitable coding, modulation, spread spectrum and/or scrambling scheme from the channel estimating that obtains by the feedback of leading in the sign indicating number Node B 310 emissions to be comprised by Node B 310 emission.The symbol that is produced by emission processor 380 will be provided for frame emission processor 382 to be used to create frame structure.Frame emission processor 382 through with symbol with come self-controller/processor 390 in lead sign indicating number 214 (Fig. 2) and carry out multiplexingly creating this frame structure, thereby produce a series of frame.These frames are provided for transmitter 356 subsequently, and transmitter 356 provides and comprises amplification, filtering and these frames are modulated on the carrier wave to be used on wireless medium, carrying out ul transmissions in interior various signal conditioning functions through smart antenna 352.
Combine the described mode of receiver function ul transmissions to be handled to be similar at Node B 310 places at UE 350 places.Receiver 335 is through the transmission of smart antenna 334 receiving uplinks and handle this transmission to recover to be modulated at the information on the carrier wave.The information of being recovered by receiver 335 is provided for received frame processor 336; Lead sign indicating number 214 (Fig. 2) during received frame processor 336 each frame of parsing are also incited somebody to action and offer channel processor 344, and data-signal, control signal and reference signal are offered receiving processor 338.The opposite processing of processing that emission processor 380 among receiving processor 338 execution and the UE 350 is carried out.Entrained data-signal and the control signal of frame by being decoded by success is provided for data sink 339 and controller/processor 340 subsequently respectively.If some frame is not received processor 338 and successfully decodes, controller/processor 340 can also use affirmation (ACK) and/or NACK (NACK) agreement to support the repeat requests to those frames so.
Controller/processor 340 and controller/processor 390 can be respectively applied for the operation of instructing Node B 310 and UE 350 places.For example, controller/processor 340 and controller/processor 390 can provide the various functions that comprise timing, peripheral interface, voltage adjustment, power management and other controlled function.Memory 342 and 392 computer-readable medium can be stored data and the software that is used for Node B 310 and UE 350 respectively.For example; The memory 392 of UE 350 comprises auxilliary carrier synchronization assembly 393; The latter is configured to confirm transmit timing information UE 350 when Be Controlled device/processor 390 is carried out, and this transmit timing information is used for the uplink communication from UE 350 is synchronized to the auxiliary carrier frequency rate of multicarrier system.As stated, for the application's purpose, term " auxilliary frequency " means another frequency or other frequency, rather than is intended to the hierarchical relationship of any kind of expression " auxilliary frequency " and other frequencies.Scheduler/the processor 346 at Node B 310 places can be used to the Resources allocation to UE, and scheduling is to downlink transmission and/or the ul transmissions of UE.
In it should be noted that aspect the application selected, the memory 342 of Node B 310 is also stored synchronizing information registration table 343, the latter comprise to by around the Node B carrier frequency of serving in the record of synchronizing information of each carrier frequency.
For more capacity is provided, the TD-SCDMA system can allow multi-carrier signal or multiple radio frequency.Suppose that N is the sum of carrier wave, carrier frequency can by the set F (i), i=0,1 ..., N-1} representes, wherein, carrier frequency F (0) is that main carrier frequency and remaining are the auxiliary carrier frequency rates.For example, a sub-district can have 3 carrier signals, thereby can on some yard channel of the time slot on the frequency of carrier signal in these 3 frequency of carrier signal, send data.Fig. 4 shows the block diagram 40 of the carrier frequency in the multi-carrier TD-SCDMA communication system.Multiple radio frequency comprises main carrier frequency 400 (F (0)) and a plurality of auxiliary carrier frequency rate, wherein, these a plurality of auxiliary carrier frequency rates comprise auxilliary 1401 with auxilliary N 402 (F (1) and F (2)).In these multicarrier systems; Overhead can send on first time slot (TS0) of main carrier frequency 400; Wherein, main carrier frequency 400 comprises Primary Common Control Physical Channel (P-CCPCH), auxiliary publish control physical channel (S-CCPCH) and pilot tone indicator channel (PICH) etc.Traffic Channel then can be carried on remaining time slots (TS1-TS6) and the auxiliary carrier frequency rate (auxilliary 1401 with auxilliary N 402) of main carrier frequency 400.Therefore, in these configurations, UE will be on main carrier frequency 400 receiving system information and monitor for pages message, and in main carrier frequency 400 and auxiliary carrier frequency rate (auxilliary 1401 with auxilliary N 402) one or all on transmit and receive data.
DwPTS and UpPTS can be configured on main carrier frequency 400 and the auxiliary carrier frequency rate (auxilliary 1401 with auxilliary N 402).Yet random access procedure can use main carrier frequency 400 to carry out, and can use one in main carrier frequency 400 and the auxiliary carrier frequency rate (auxilliary 1401 with auxilliary N 402) or both to carry out and switch process of uplink synchronization.
The function of UE in the TD-SCDMA system is a uplink synchronisation.The synchronous character of TD-SCDMA system makes from just can side by side being received at this Node B place by all uplink communications of each UE of specific Node B service.UE carries out this uplink synchronisation through synchronization message with regularly measuring in following two time periods usually: initially insert and switch.Between initial access periods, UE comes to receive timing information from Node B through the system information that receives via control channel and other system management channel.During handoff procedure, UE is at first to Node B transmission uplink synchronisation (SYNC_UL) sign indicating number and via FPACH (physical access channel) confirmation of receipt message (ACK), and wherein, this ACK indicates timing information.In response to this timing information, UE adjusts uplink transmit timing when Traffic Channel is switched to Target cell.
Available uplink synchronisation sign indicating number and FPACH information are indicated by source node B.But in multi-carrier TD-SCDMA, process of uplink synchronization maybe be more complicated-particularly when UE has Dedicated Traffic Channel on more than a carrier frequency.In initial access situation, because control channel and other system management channel be positioned on the main carrier frequency, so UE can use main carrier frequency rather than auxilliary carrier wave to carry out uplink synchronisation.In addition, to handoff procedure, the TD-SCDMA standard uses single frequency to solve the problem of uplink synchronisation.Therefore, UE can not use any channel on another frequency that is arranged in Target cell to carry out uplink synchronisation.
Fig. 5 illustrates the functional block diagram that is performed with the exemplary block of an embodiment realizing the application.In square frame 500, confirm uplink transmit timing to the first frequency in the multi-carrier TD-SCDMA system.Subsequently in square frame 501, based on carrying out uplink synchronisation on the auxilliary frequency of at least one in multi-carrier TD-SCDMA system of determined uplink transmit timing.Aspect this of the application, UE carries out uplink synchronisation on the carrier frequency by the Node B indication, and subsequently all carrier frequencies that will send uplink service is above that used identical uplink transmit timing.
of the application substituting aspect, can directly estimate to be applied to the uplink synchronisation of all the other carrier frequencies to the timing slip of extra carrier wave and with this timing slip.This substituting aspect; The timing slip of the DwPTS that received of UE on can measuring frequency carrier wave F (j); And UE can go up at remaining frequencies carrier wave F (k) and carry out uplink synchronisation subsequently, and these remaining frequencies carrier waves F (k) carries uplink for UE.
In the process of the measured timing slip of the DwPTS that obtains to be received, when the DwPTS on the frequency carrier F (j) was received early than the DwPTS on remaining carrier frequency F (k), (j was k) greater than 0 to suppose measured timing slip D.So, should use like the extra deviant of giving a definition and be adjusted at the uplink transmit timing on the F (k):
T_adv(k)＝T_adv(j)+2*D(j，k) (1)
Wherein, T_adv (j) is worth when the time that the FPACH ACK that when carrier frequency F (j) upward carries out process of uplink synchronization, is received through use obtains in advance.T_adv (k) shifts to an earlier date (zero advancement) through assumed zero point to be based under the situation of the DwPTS that identical carrier frequency F (k) go up to receive and to derive according to formula (1).
Fig. 6 is the signal flow graph in the multi-carrier TD-SCDMA communication system 60 that disposes of an aspect according to the application.Multi-carrier TD-SCDMA communication system 60 comprises UE 600, Node B carrier wave j 601 and Node B carrier wave k 602.During the time period shown in Fig. 6, UE 600 has carried out the uplink synchronisation with Node B carrier wave j 601, and has therefore received the uplink transmit timing to Node B carrier wave j 601.Because UE 600 can use the single frequency of Node B carrier wave j 601 to carry out uplink synchronisation, so UE 600 will use the principle of formula (1) to confirm the uplink transmit timing to Node B carrier wave k 602.
Because the uplink synchronisation to Node B carrier wave j 601 takes place, so UE 600 has known that the time is worth T_adv (j) in advance.Therefore, for the derivation time is worth T_adv (k) in advance, to Node B carrier wave k 602, UE 600 will measure timing slip D (j, k).At the moment 603 places, the DwPTS of Node B carrier wave j 601 and Node B carrier wave k 602 is sent to UE 600.UE 600 is at the DwPTS of the 604 receiving node B of place carrier wave j 601 constantly and at the DwPTS of the 605 receiving node B of place carrier wave k 602 constantly.The delay between 604 and constantly 605 constantly constituted timing slip D (j, k).Therefore; When using Node B carrier wave k 602 to come scheduling uplink communication; UE 600 will be in the transmission of its uplink communication of 607 places scheduling constantly, this moment 607 be directed against timing slip between the ul transmissions of the communicating by letter moment 608 that sends to Node B carrier wave j 601 be D (j, k).
For the purpose of Fig. 6, to going up the DwPTS that receives with reference to being based on identical carrier frequency F (k) in advance the zero point of carrier frequency F (k).Can find out in the time period between 605 and constantly 610 that constantly wherein, 605 is UE 600 receives downlink communication from Node B carrier wave k 602 moment constantly the zero point to F (k) in advance.Can find out in the time period between 604 and constantly 609 that constantly wherein, 604 is UE 600 receives downlink communication from Node B carrier wave j601 moment constantly the zero point to F (j) in advance.To time of Node B carrier wave k 602 be worth in advance T_adv (k) can be regarded as through from zero point in advance constantly 610 deduct the time be worth in advance T_adv (j) with constantly 607 and 608 and the moment 609 and 610 between two timings that the timing slip sum measures.In case UE 600 has confirmed the time and has been worth T_adv (k) in advance that UE 600 can be synchronous with its uplink communication and Node B carrier wave k 602 so.
It should be noted that aspect the application substituting, in fact can be based on carrier frequency F (j) zero point of carrier frequency F (k) in advance and go up the DwPTS that receives.Fig. 7 is the signal flow graph in the multi-carrier TD-SCDMA communication system 60 that disposes of an aspect according to the application.Once more, for the purpose of Fig. 7, uplink synchronisation is accomplished between UE 600 and Node B carrier wave j 601.Therefore, the uplink transmit timing information to Node B carrier wave j 601 is received.At 700 places constantly, both send downlink transmission to UE 600 Node B carrier wave j 601 and Node B carrier wave k 602.UE 600 at 701 places constantly from Node B carrier wave j 601 receiving downlink communications and 702 indicating constantly from Node B carrier wave k 602 receiving downlinks.UE 600 measure constantly the time difference between 701 and constantly 702 as timing slip D (j, k).When scheduling uplink is communicated by letter, UE 600 at 704 places constantly with the transmitting and scheduling of uplink communication to Node B carrier wave k 602 and at 705 places constantly with the transmitting and scheduling of uplink communication to Node B carrier wave j 601.Difference between the moment 704 and the moment 705 equals timing slip D, and (j, k), (j k) is receiving down link indication back measurement to this timing slip D.Aspect Fig. 7 described, zero point, reference in advance was positioned at 706 places constantly now, and should shift to an earlier date with reference to shared by two carrier frequencies (F (j) and F (k)) zero point.Therefore, when the time to Node B carrier wave k 602 of deriving was worth T_adv (k) in advance, calculating was from 706 begin constantly.Through beginning from identical reference point, referring to as the formula of giving a definition, only need be worth in advance in the time of Node B carrier wave j 601 increase on the basis of T_adv (j) single timing slip D (j, k):
T_adv(k)＝T_adv(j)+D(j，k) (2)
Therefore, being worth T_adv (k) in advance to time of Node B carrier wave k 602 will be with reference to 706 deducting to 601 times of Node B carrier wave j and be worth T_adv (j) and timing slip D (j, k) sum in advance constantly.In case confirmed to be worth T_adv (k) in advance to the time of Node B carrier wave k 602, UE 600 just can be synchronous with uplink communication and Node B carrier wave k 602 so afterwards.
Should be noted in the discussion above that about Fig. 6 and 7 described the application's various aspects derives to the mode of the uplink transmit timing of the Node B with different carrier frequencies and carries out the uplink synchronisation in the handoff procedure through being based in part on the known uplink transmit timing of Node B (using the uplink synchronisation of this uplink transmit timing to take place).But the application's other aspect can also be through the receiving uplink synchronous code provides the uplink synchronisation that the switching of Node B (these Node B have a plurality of carrier frequencies) is carried out from the cell-of-origin.
Fig. 8 is the call flow diagram of the call flow during the direct-cut operation in the TD-SCDMA communication system 80 that disposes of an aspect according to the application.The Node B 802 that TD-SCDMA system 80 comprises UE 800, has the Node B 801 of single carrier frequency and have two carrier frequencies (Freq 1 and Freq 2).Start the switching to UE 800, wherein, UE 800 will switch to the have a plurality of carrier frequencies Node B 802 of (Freq 1 and Freq 2) from the single dedicated frequency of Node B 801.At 803 places, this handoff procedure reconfigures message from Node B 801 to UE 800 transmission physical channels to begin.This physical channel reconfigures message and comprises uplink synchronisation sign indicating number and FPACH to each carrier frequency of Node B 802.At 804 places, UE 800 goes up to Node B 802 in each carrier frequency (Freq 1 and Freq 2) and sends synchronous code.Send it back UE 800 at 805 and 806 places constantly by Node B 802 respectively subsequently to the single uplink transmit timing information of Freq 1 and Freq 2.Then; UE 800 can use this uplink transmit timing information to accomplish the uplink synchronisation of on each carrier frequency among carrier frequency Freq 1 and the Freq 2, carrying out, and begins to send uplink dedicated transport channels (DTCH) at 807 places constantly.
In a kind of configuration; UE comprises the module that is used for confirming to the uplink transmit timing of the first frequency of multi-carrier TD-SCDMA system, and the module that is used for carrying out at least one auxilliary frequency of multi-carrier TD-SCDMA system based on determined uplink transmit timing uplink synchronisation.In one aspect, aforesaid module can be to be configured to carry out by the controller/processor 390 of the cited function of aforesaid module, that carry out and be stored in auxilliary carrier synchronization assembly 393, channel processor 394, antenna 352, receiver 354, received frame processor 360 and the receiving processor 370 in the memory 392 by controller/processor 390.In yet another aspect, aforesaid module can be to be configured to carry out assembly or any device by the cited function of aforesaid module.
In the another kind configuration; UE also comprises: be used to measure the module of the timing slip on first frequency and any auxilliary frequency, and the module that was used for before execution is used at least one auxilliary frequency carrying out the module of uplink synchronisation adjusting based on measured timing slip determined uplink transmit timing.In one aspect, aforesaid module can be to be configured to carry out by the controller/processor 390 of the cited function of aforesaid module, that carry out and be stored in auxilliary carrier synchronization assembly 393, channel processor 394, antenna 352, receiver 354, received frame processor 360 and the receiving processor 370 in the memory 392 by controller/processor 390.In yet another aspect, aforesaid module can be to be configured to carry out assembly or any device by the cited function of aforesaid module.
In the another kind configuration; UE also comprises: be used for sending the module to the synchronizing information of all carrier frequencies of being served by Target cell to Target cell; Said synchronizing information receives from the cell-of-origin; Be used to receive the module of the FPACH ACK that joins with each frequency dependence, be used for obtaining module to the single transmit timing value of each frequency from the FPACH ACK that is received, and the module that is used on each frequency of serving by Target cell, carrying out individually uplink synchronisation.In one aspect, aforesaid module can be to be configured to carry out controller/processor 390, channel processor 394, emission processor 380, frame emission processor 382, transmitter 356 and the antenna 352 by the cited function of aforesaid module.In yet another aspect, aforesaid module can be to be configured to carry out assembly or any device by the cited function of aforesaid module.
This paper with reference to the TD-SCDMA system introduction some aspects of telecommunication system.Those skilled in the art will recognize easily, run through various aspects described herein and can expand to other telecommunication system, the network architecture and communication standard.As for example, various aspects can expand to and insert (HSDPA), High Speed Uplink Packet such as W-CDMA, high-speed downlink packet and insert (HSUPA), high-speed packet and insert+(HSPA+) with TD-CDMA other UMTS system.Various aspects can also expand to system and/or other the suitable system that uses Long Term Evolution (LTE) (under FDD and/or tdd mode), senior LTE (LTE-A) (under FDD and/or tdd mode), CDMA2000, Evolution-Data Optimized (EV-DO), Ultra-Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, ultra broadband (UWB), bluetooth.Actual employed telecommunication standard, the network architecture and/or communication standard will depend on certain applications and to overall design constraints condition that system applied.
This paper combines various apparatus and method to describe some processors.These processors can use electronic hardware, computer software or the two combination in any to realize.Be embodied as hardware or become software as for sort processor, will depend on certain applications and overall design constraints condition that system applied.As giving an example, the combination in any of the processor that is proposed among the application, the arbitrary portion of processor or processor can be used microprocessor, microcontroller, digital signal processor (DSP), field programmable gate array (FPGA), programmable logic device (PLD), state machine, gate logic, discrete hardware circuit and be configured to carry out other proper process assembly that runs through the described various functions of the application and realize.The function of the combination in any of the processor that the application proposed, the arbitrary portion of processor or processor can use the software of being carried out by microprocessor, microcontroller, DSP or other suitable platform to realize.
No matter be called as software, firmware, middleware, microcode, hardware description language or other title, software should be construed as denoting broadly all that acute pyogenic infection of finger tip makes, the thread of instruction set, code, code segment, program code, program, subprogram, software module, application program, software application, software kit, routine, subroutine, object, executable file, execution, process, function etc.Software can be positioned on the computer-readable medium.As giving an example; Computer-readable medium such as magnetic storage apparatus (for example can comprise; Hard disk, floppy disk, tape), CD (for example; Compact disk (CD), digital versatile disc (DVD)), the memory of smart card, flash memory device (for example, card, rod, key-type driver), random-access memory (ram), read-only memory (ROM), programming ROM (PROM), erasable PROM (EPROM), electrically-erasable PROM (EEPROM), register or mobile disk and so on.Memory is what to separate with processor shown in the various aspects that the application proposes though run through, and memory also can be positioned at processor inside (for example, cache memory or register).
Computer-readable medium can be embodied in the computer program.As giving an example, computer program can comprise the computer-readable medium that is arranged in encapsulating material.How to person of skill in the art will appreciate that according to certain applications with to overall design constraints condition that system applied and realize running through the described function of the application with the mode of the best.
It should be understood that the concrete order of the step in disclosed method and the explanation that level is example process.The concrete order and the level that it should be understood that step in the method are to arrange again according to design preference.Appended claim to a method has provided the key element of each step with exemplary order, unless explicit state, these claim to a method are not limited to given concrete order or level.
The description that the front is provided is can realize various aspects described herein for any technical staff who makes this area.Various modifications to these aspects are conspicuous for a person skilled in the art, and General Principle defined herein can be applied to others.Therefore, claim is not to be intended to be limited to the various aspects shown in this paper, but with the corresponding to four corner of claim term; Wherein, Unless stated otherwise, be not intended to expression " and only " otherwise quote a certain element with singulative, but expression " one or more ".Only if special provision, otherwise that term " some " refers to is one or more.Mention that the phrase of " at least one " in the item list refers to the combination in any of those clauses and subclauses (comprising single clauses and subclauses).Give one example, " at least one in following: a, b or c " is intended to contain: a; B; C; A and b; A and c; B and c; And a, b and c.To run through all of key element of the described various aspects of the application structural with function on equivalent incorporate this paper clearly into way of reference and be intended to be contained in the claim, if the equivalent on these structural and functions is known to those skilled in the art or will be known.In addition, have no disclosure to want to offer to the public among this paper, no matter whether such disclosure clearly is documented in claims.Should be according to the 112nd article of the 6th section of key element of explaining any claim of united states patent law; Only if this key element be with phrase " be used for ... module " enunciate; Perhaps in claim to a method, this key element be to use phrase " be used for ... step " narrate.
Claims (24)
1. method that is used for the uplink synchronisation of multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system, said method comprises:
Confirm uplink transmit timing to the first frequency in the said multi-carrier TD-SCDMA system; And
Based on carrying out uplink synchronisation on the auxilliary frequency of at least one in said multi-carrier TD-SCDMA system of determined said uplink transmit timing.
2. method according to claim 1 further comprises:
The timing slip of measurement on said first frequency and said at least one auxilliary frequency; And
On said at least one auxilliary frequency, carry out the step of said uplink synchronisation and adjust determined said uplink transmit timing based on measured said timing slip before.
3. method according to claim 2, wherein, said timing slip is to use the down link pilot timeslot (DwPTS) of said first frequency and said at least one auxilliary frequency to measure.
4. subscriber equipment that is configured in multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system to carry out uplink synchronisation, said subscriber equipment comprises:
Be used for confirming module to the uplink transmit timing of the first frequency of said multi-carrier TD-SCDMA system; And
Be used at least one auxilliary frequency of said multi-carrier TD-SCDMA system, carrying out the module of uplink synchronisation based on determined said uplink transmit timing.
5. subscriber equipment according to claim 4 further comprises:
Be used to measure the module of the timing slip on said first frequency and said at least one auxilliary frequency; And
Be used for adjusting based on measured said timing slip before the module of determined said uplink transmit timing in the said module that is used for the said uplink synchronisation of execution on said at least one auxilliary frequency of execution.
6. subscriber equipment according to claim 5, wherein, said timing slip is to use the down link pilot timeslot (DwPTS) of said first frequency and said at least one auxilliary frequency to measure.
7. computer program, it has the computer-readable medium of the code that has program stored therein above that, and said program code comprises:
Be used for confirming program code to the uplink transmit timing of the first frequency of said multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system; And
Be used at least one auxilliary frequency of said multi-carrier TD-SCDMA system, carrying out the program code of uplink synchronisation based on determined said uplink transmit timing.
8. computer program according to claim 7, wherein, said program code further comprises:
Be used to measure the program code of the timing slip on said first frequency and said at least one auxilliary frequency; And
Be used for adjusting based on measured said timing slip before the program code of determined said uplink transmit timing at the said program code that is used for the said uplink synchronisation of execution on said at least one auxilliary frequency of execution.
9. computer program according to claim 8, wherein, said timing slip is to use the down link pilot timeslot (DwPTS) of said first frequency and said at least one auxilliary frequency to measure.
10. subscriber equipment, it is configured to be used for the radio communication of multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system, and said subscriber equipment comprises:
At least one processor; And
Memory, it is coupled to said at least one processor,
Wherein, said at least one processor is configured to:
Confirm uplink transmit timing to the first frequency in the said multi-carrier TD-SCDMA system; And
Based on carrying out uplink synchronisation on the auxilliary frequency of at least one in said multi-carrier TD-SCDMA system of determined said uplink transmit timing.
11. subscriber equipment according to claim 10, wherein, said at least one processor further is configured to:
The timing slip of measurement on said first frequency and said at least one auxilliary frequency; And
Adjust determined said uplink transmit timing based on measured said timing slip before on said at least one auxilliary frequency, carrying out said uplink synchronisation.
12. subscriber equipment according to claim 11, wherein, said timing slip is to use the down link pilot timeslot (DwPTS) of said first frequency and said at least one auxilliary frequency to measure.
13. a method that is used for the uplink synchronisation of multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system, said method comprises:
Send to the synchronizing information by each frequency in a plurality of carrier frequencies of said Target cell service to Target cell, said synchronizing information receives from the cell-of-origin;
Receive physical access channel (FPACH) confirmation signal (ACK) that joins with said each frequency dependence;
Obtain single transmit timing value from the said FPACH ACK that is received to said each frequency; And
On by said each frequency in said a plurality of carrier frequencies of said Target cell service, carry out uplink synchronisation individually.
14. method according to claim 13 further comprises:
Use said single transmit timing value to start uplink.
15. method according to claim 13, wherein, said synchronizing information comprises at least one in following:
The uplink synchronisation sign indicating number; And
FPACH resource with said each frequency dependence couplet.
16. a subscriber equipment, it is used for the uplink synchronisation of multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system, and said subscriber equipment comprises:
Be used for sending to Target cell the module of the synchronizing information of each frequency that is directed against a plurality of carrier frequencies of being served by said Target cell, said synchronizing information receives from the cell-of-origin;
Be used to receive the module of physical access channel (FPACH) confirmation signal (ACK) that joins with said each frequency dependence;
Be used for obtaining module to the single transmit timing value of said each frequency from the said FPACH ACK that is received; And
Be used on said each frequency of said a plurality of carrier frequencies of serving, carrying out individually the module of uplink synchronisation by said Target cell.
17. subscriber equipment according to claim 16 further comprises:
Be used to use said single transmit timing value to start the module of uplink.
18. subscriber equipment according to claim 16, wherein, said synchronizing information comprises at least one in following:
The uplink synchronisation sign indicating number; And
FPACH resource with said each frequency dependence couplet.
19. a computer program, it has the computer-readable medium of the code that has program stored therein on it, and said program code comprises:
Be used for sending to Target cell the program code of the synchronizing information of each frequency that is directed against a plurality of carrier frequencies of being served by said Target cell, said synchronizing information receives from the cell-of-origin;
Be used to receive the program code of physical access channel (FPACH) confirmation signal (ACK) that joins with said each frequency dependence;
Be used for obtaining program code to the single transmit timing value of said each frequency from the said FPACH ACK that is received; And
Be used on said each frequency of said a plurality of carrier frequencies of serving, carrying out individually the program code of uplink synchronisation by said Target cell.
20. computer program according to claim 19 further comprises:
Be used to use said single transmit timing value to start the program code of uplink.
21. computer program according to claim 19, wherein, said synchronizing information comprises at least one in following:
The uplink synchronisation sign indicating number; And
FPACH resource with said each frequency dependence couplet.
22. a subscriber equipment, it is configured to be used for the radio communication of multi-carrier time-division synchronous code division multiple access (TD-SCDMA) system, and said subscriber equipment comprises:
At least one processor; And
Memory, it is coupled to said at least one processor,
Wherein, said at least one processor is configured to:
Send to the synchronizing information by each frequency in a plurality of carrier frequencies of said Target cell service to Target cell, said synchronizing information receives from the cell-of-origin;
Receive physical access channel (FPACH) confirmation signal (ACK) that joins with said each frequency dependence;
Obtain single transmit timing value from the said FPACH ACK that is received to said each frequency; And
On by said each frequency in said a plurality of carrier frequencies of said Target cell service, carry out uplink synchronisation individually.
23. subscriber equipment according to claim 22, wherein, said at least one processor further is configured to:
Use said single transmit timing value to start uplink.
24. subscriber equipment according to claim 22, wherein, said synchronizing information comprises at least one in following:
The uplink synchronisation sign indicating number; And
FPACH resource with said each frequency dependence couplet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410057307.5A CN103795434B (en) | 2010-10-21 | 2011-04-08 | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/909,723 US8798030B2 (en) | 2010-04-07 | 2010-10-21 | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
| US12/909,723 | 2010-10-21 | ||
| PCT/US2011/031852 WO2011127451A1 (en) | 2010-04-07 | 2011-04-08 | Facilitating uplink synchronization in td-scdma multi-carrier systems |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410057307.5A Division CN103795434B (en) | 2010-10-21 | 2011-04-08 | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102318415A true CN102318415A (en) | 2012-01-11 |
| CN102318415B CN102318415B (en) | 2014-08-20 |
Family
ID=45438660
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180000195.4A Expired - Fee Related CN102318415B (en) | 2010-10-21 | 2011-04-08 | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
| CN201410057307.5A Expired - Fee Related CN103795434B (en) | 2010-10-21 | 2011-04-08 | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410057307.5A Expired - Fee Related CN103795434B (en) | 2010-10-21 | 2011-04-08 | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN102318415B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104272821A (en) * | 2012-05-10 | 2015-01-07 | 瑞典爱立信有限公司 | Uplink timing error reduction method and apparatus |
| CN116827155A (en) * | 2023-06-28 | 2023-09-29 | 荣信汇科电气股份有限公司 | Control system of cascade multi-level converter and carrier synchronization method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024125418A1 (en) * | 2022-12-15 | 2024-06-20 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Apparatus and method of uplink transmission timing management for mobility |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004077919A2 (en) * | 2003-03-07 | 2004-09-16 | Koninklijke Philips Electronics N.V. | Method and system for maintaining uplink synchronization with peer-to-peer communication in wireless communication system |
| CN1744463A (en) * | 2004-08-31 | 2006-03-08 | 西门子（中国）有限公司 | Up closed ring synchronous control method in time division-synchronous CDMA accessing system |
| WO2006110774A2 (en) * | 2005-04-12 | 2006-10-19 | Motorola Inc. | Method and system for performing uplink synchronization |
| CN101075846A (en) * | 2006-10-10 | 2007-11-21 | 浙江华立通信集团有限公司 | Method for accelerating mobile terminal synchronization process in TD-SCDMA system |
| CN101370267A (en) * | 2007-08-19 | 2009-02-18 | 中兴通讯股份有限公司 | Switching method for mobile communication system |
| 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 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100558019C (en) * | 2002-10-23 | 2009-11-04 | 华为技术有限公司 | A kind of initial uplink method for synchronous of tdd systems |
| CN100388647C (en) * | 2004-07-29 | 2008-05-14 | 华为技术有限公司 | Method for up going synchronization and accessing customer equipment in multicarrier system |
| CN101128035B (en) * | 2006-08-18 | 2011-08-24 | 中兴通讯股份有限公司 | Inter-channel timing method in time division code division multi-address system |
| CN101754344B (en) * | 2008-12-19 | 2011-11-09 | 中国移动通信集团设计院有限公司 | Uplink covering capacity control method of time division synchronization code division multiple access (TD-SCDMA) system and user equipment |
| CN101621843B (en) * | 2009-07-28 | 2011-11-09 | 新邮通信设备有限公司 | Uplink synchronization method, network side equipment, user equipment (UE) and mobile communication system |
-
2011
- 2011-04-08 CN CN201180000195.4A patent/CN102318415B/en not_active Expired - Fee Related
- 2011-04-08 CN CN201410057307.5A patent/CN103795434B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004077919A2 (en) * | 2003-03-07 | 2004-09-16 | Koninklijke Philips Electronics N.V. | Method and system for maintaining uplink synchronization with peer-to-peer communication in wireless communication system |
| CN1744463A (en) * | 2004-08-31 | 2006-03-08 | 西门子（中国）有限公司 | Up closed ring synchronous control method in time division-synchronous CDMA accessing system |
| WO2006110774A2 (en) * | 2005-04-12 | 2006-10-19 | Motorola Inc. | Method and system for performing uplink synchronization |
| CN101075846A (en) * | 2006-10-10 | 2007-11-21 | 浙江华立通信集团有限公司 | Method for accelerating mobile terminal synchronization process in TD-SCDMA system |
| CN101370267A (en) * | 2007-08-19 | 2009-02-18 | 中兴通讯股份有限公司 | Switching method for mobile communication system |
| 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 |
Non-Patent Citations (2)
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104272821A (en) * | 2012-05-10 | 2015-01-07 | 瑞典爱立信有限公司 | Uplink timing error reduction method and apparatus |
| CN116827155A (en) * | 2023-06-28 | 2023-09-29 | 荣信汇科电气股份有限公司 | Control system of cascade multi-level converter and carrier synchronization method thereof |
| CN116827155B (en) * | 2023-06-28 | 2024-02-20 | 荣信汇科电气股份有限公司 | Control system of cascade multi-level converter and carrier synchronization method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103795434B (en) | 2017-04-26 |
| CN103795434A (en) | 2014-05-14 |
| CN102318415B (en) | 2014-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102356662B (en) | For performing the method and apparatus measured and send with the discontinuous reception of the control channel realizing the switching between wireless network (DRX) message | |
| CN102572985B (en) | For improvement of from the TD-SCDMA circuit switched fallback of TDD-LTE system be redirected system and method | |
| CN102972086B (en) | Transmission hang-up in TD-SCDMA and recovery are coordinated | |
| CN102547893B (en) | Relay switching from TDD-LTE system to TD-SCDMA system | |
| CN102388662A (en) | Discontinuous reception (DRX) for multimode user equipment (UE) operation | |
| CN103460763B (en) | Improved measurement in TDD LTE and TD SCDMA/GSM systems simultaneously | |
| CN102124804A (en) | Method and apparatus for the multimode terminal in idle mode operation in CDMA 1XRTT and frame asynchronous TD-SCDMA networks | |
| CN102547829A (en) | Scheduling TDD-LTE measurement in TD-SCDMA systems | |
| CN103781134A (en) | Facilitating baton handover in multi-carrier TD-SCDMA communications systems | |
| CN103535077A (en) | Packet-switch handover in simultaneous tdd-lte and td-scdma mobile communications | |
| CN103109562A (en) | Effective timing measurements by a multi-mode device | |
| CN102550100B (en) | The uplink synchronisation of the TD-SCDMA many USIM mobile terminal during switching | |
| CN102273278A (en) | Method of service redirection procedures in TD-SCDMA and GSM hybrid mobile terminals | |
| CN103535089A (en) | Method and apparatus for deriving fine timing to assist position acquisition in a communication network | |
| CN103369664B (en) | The method and apparatus that synchronous shift command efficiency of transmission is improved in TD SCDMA uplink synchronisations | |
| CN102356661A (en) | Signal measurement in td-scdma multicarrier systems using downlink synchronization codes | |
| CN102334364A (en) | Facilitating open loop power control in td-scdma multi-carrier systems | |
| CN102124793B (en) | Method and apparatus for enhancement of synchronization for TD-SCDMA baton handover | |
| CN102907138B (en) | The handoff procedure of the improvement in TD-SCDMA | |
| CN102860112A (en) | Cqi reporting of td-scdma multiple usim mobile terminal during hsdpa operation | |
| CN102907142A (en) | Additional service type setup in mobile terminals having multiple radio access network accessibility | |
| CN102204370B (en) | Method and apparatus of processing synchronization shift commands in td-scdma uplink synchronization | |
| CN102160435A (en) | Avoidance of synchronization oscillation in td-scdma uplink synchronization | |
| CN102356664A (en) | Method and apparatus for pre-uplink synchronization in td-scdma handover | |
| CN102318415B (en) | Facilitating uplink synchronization in TD-SCDMA multi-carrier systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20190408 |