CN102761954B - Uplink synchronisation method and system in multi-carrier communications systems - Google Patents
Uplink synchronisation method and system in multi-carrier communications systems Download PDFInfo
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- CN102761954B CN102761954B CN201110111834.6A CN201110111834A CN102761954B CN 102761954 B CN102761954 B CN 102761954B CN 201110111834 A CN201110111834 A CN 201110111834A CN 102761954 B CN102761954 B CN 102761954B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
The invention discloses uplink synchronisation method in a kind of multi-carrier communications systems, including：Network side indicates that the UE is in cell to be polymerized by the current serving cell of user equipment (UE) can receive the state of downstream message；The network side sends the uplink synchronous instruction time information for uplink synchronous after the UE completes Stochastic accessing in cell to be polymerized to the UE；The UE completes uplink synchronous in the uplink synchronous instruction time in cell to be polymerized, is normally carried out up-downgoing data transmit-receive.The present invention discloses uplink synchronous system in a kind of multi-carrier communications systems.The present invention realizes the secondary cell uplink synchronous in LTE Advanced systems, and mode is simple and quick.
Description
Technical field
The present invention relates to a kind of uplink synchronous technology, more particularly in a kind of multi-carrier communications systems secondary cell it is up same
One step process and system.
Background technology
Senior long term evolution (LTE-Advanced, Long Term Evolution Advanced) system is that the third generation is closed
Make Partnership Program (3GPP, the 3rd Generation Partner Project) tissue to meet International Telecommunication Union
(ITU, International Telecommunication Union), senior international mobile communication (IMT-Advanced,
International Mobile Telecommunication-Advanced) requirement and the standard released.LTE-
Advanced systems are an evolution versions in Long Term Evolution (LTE, Long Term Evolution) system-based, its
Many new technologies are introduced to meet in IMT-Advanced high-speed transfer demand, introduced technology most important one just
It is carrier aggregation technology.
Due to the property in short supply of current radio spectrum resources, the frequency spectrum resource that each mobile operator in the world is possessed often compares
It is scattered, and IMT-Advanced requires that the index of peak rate is higher and (supports to prop up under 100Mbps, Hypomobility under high mobility
Hold 1Gbps), with current LTE standard maximum 20MHz bandwidth, far from meeting IMT-Advanced requirements, it is necessary to by frequency band
Extend to more high bandwidth, such as 40MHz, 60MHz, even more high.For current LTE-Advanced systems intermediate frequency spectrum resource not
Continuous reality, the currently active ground technological means is to enter several LTE frequency bands based on 20MHz by way of " carrier aggregation "
Row bandwidth expansion.
In the LTE-Advanced systems for applying carrier aggregation technology, the carrier wave for participating in polymerization is referred to as component carrier
(Component Carrier), user equipment (UE, User Equipment) can realize number on multiple component carriers simultaneously
According to transmission.Component carrier can use LTE defined frequency ranges, can also use the frequency specially increased newly for LTE-Advanced
Section.Because current frequency spectrum resource is nervous, it is impossible to always there is on frequency domain continuous component carrier distribute to operator and use, therefore divide
Loading gage ripple can be continuous or discontinuous on frequency band.Main plot and secondary cell are introduced in carrier aggregation
Concept, main plot refers to UE and initiates wireless heterogeneous networks (RRC, Radio Resource Control) connection foundation or RRC connections
Rebuild or be designated as in handoff procedure the cell of main plot；Secondary cell refers to the frequency for being different from main plot, and enters in UE
Enter cell configured after RRC connection status, for providing extra Radio Resource.
Introduce after carrier aggregation technology, UE can be simultaneously in multiple serving cells in RRC connected states (RRC_CONNECTED)
Carry out data transmission, but for Idle state (RRC_IDLE) UE, as LTE, be only capable of being resident on one cell, UE exists
After being successfully accessed in the cell, i.e. UE is set up in the cell after RRC connections, and according to business needs, base station can be by special
RRC signaling is the newly-increased cell of UE distribution, distributes base station and UE after these newly-increased cells and is not carried out immediately in the newly-increased cell
Data transmit-receive, i.e. base station do not send business datum in the newly-increased cell to UE, and UE preserves the configuration information in the cell, but
Business datum currently is sent to base station not in the cell, and the further activation for being to wait for base station is indicated.Subsequent base stations
It can be needed to activate the cell according to business, after the cell is activated, base station and UE could carry out data transmit-receive in the cell.
In LTE system, in order to realize and keep the uplink synchronous between UE and base station, base station according to base station and each UE it
Between propagation delay time send Timing Advance (TA, Timing Advance) give each UE, the time advance that UE is sent according to base station
Amount shifts to an earlier date the opportunity of respective uplink, so as to make up UE to the propagation delay time of base station so that different UE upward signal all exists
Base station is reached within the reception window of base station.
In LTE system, in order to keep the uplink synchronous between UE and base station, base station is configured with a uplink synchronous for UE and determined
When device (TAT, TimeAlignmentTimer), if UE can TAT time-out before receive the time advance that base station is sent to UE
Amount, then it is assumed that uplink synchronous is kept between the UE and the base station, otherwise it is assumed that UE loses uplink synchronous.In non-synchronous regime or
Person's desynchronizing state, UE obtains the uplink synchronous between base station by random access procedure, and UE receives the random of base station transmission
After access response (Random Access Response), start timer TAT, and taken in accidental access response according to base station
The Timing Advance of band shifts to an earlier date the opportunity of uplink.UE is obtained after the uplink synchronous with base station, during TAT is run, if
The TA orders (TimeAlignment command) that base station is sent to UE are received, then restart TAT, and carry using in TA orders
Timing Advance shift to an earlier date uplink transmission time, it is believed that UE still with base station keep uplink synchronous；If UE does not have during TAT is run
TA orders are received, i.e. when TAT is overtime, it is believed that UE loses uplink synchronous with base station and is dynamically assigned to the UE, it is necessary to delete
All up-downgoing resources, and empty all up mixed self-adapting retransmission buffer (HARQ buffer) data to be sent,
RRC sublayers are notified to discharge the static state/semi-static ascending physical signal resource for distributing to the UE, hereafter if upstream data needs hair
Send or there is downlink data to need reception, UE is required for carrying out Stochastic accessing first regaining uplink synchronous.
Introduce after carrier aggregation, UE may be simultaneously operated on multiple serving cells, and these serving cells can on frequency band
To be continuous or discontinuous；It can be in identical frequency band or come from different frequency bands.For
The discontinuous situation of serving cell, or serving cell come from the situation of different frequency bands, because each serving cell has difference
Transmission characteristic, the Timing Advance of each serving cell may be different；Even if each serving cell belong to identical frequency band and
It is continuous on frequency band, if each serving cell is derived from different Remote Radio Unit (RRU, Remote Radio Unit), Huo Zhewei
Increase MPS process, each serving cell is handled via different repeaters (repeater) respectively, then on each serving cell
Timing Advance may also be different.In LTE system, it (is one for TDD mode that UE, which is only operated on a carrier wave,
Individual carrier wave, includes up, descending a pair of carrier waves, for convenience of description, abbreviated here as a carrier wave for mode of frequency division duplexing),
The uplink synchronous of one up-link of maintenance is only needed, and in carrier aggregation, UE may be simultaneously operated in multiple serving cells
On, in Rel-10 application scenarios, the TA of these serving cells may be considered identical；Drawn when introducing radio frequency in system
Far after (RRH, Remote Radio Head) and repeater, the TA of these serving cells is possible to different.Therefore it is in UE
During RRC connection status, upstream data is sent in the cell of some unfinished uplink synchronous, the loss of data can be caused.For
Such case, causes a certain serving cell to complete up initial synchronisation on what opportunity and how to activate the service after synchronously completing
The problem of cell is urgent need to resolve in multi-carrier aggregation system.
The content of the invention
In view of this, it is a primary object of the present invention to provide in a kind of multi-carrier communications systems uplink synchronisation method and be
System, can conveniently and efficiently make the secondary cell to be added realize uplink synchronous when UE adds secondary cell.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
Uplink synchronisation method in a kind of multi-carrier communications systems, including：
Network side indicates that the UE is in cell to be polymerized by serving cell current UE can receive descending disappear
The state of breath；
The network side is sent for up after the UE completes Stochastic accessing in cell to be polymerized to the UE
Synchronous uplink synchronous instruction time information；
The UE completes uplink synchronous in the uplink synchronous instruction time in cell to be polymerized.
Preferably, the UE is in that can receive the state of downstream message in cell to be polymerized：
The UE can receive the state for the message that random access procedure is used in cell to be polymerized；
Or, the UE can receive the state of all downstream messages in cell to be polymerized.
Preferably, the network side indicates the UE in cell to be polymerized in can by the current serving cells of UE
The state of downstream message is received, is：
The network side sends the use carried by PDCCH physical layer signaling by serving cell current UE to the UE
The instruction message of downstream message can be received in indicating that the UE is in cell to be polymerized；Carried in the instruction message
The random access resource information of cell to be polymerized described in the UE Stochastic accessings.
Preferably, the UE is received after the instruction message, and methods described also includes：
The UE is directly entered the state of downstream message that can receive in cell to be polymerized, and according to the Stochastic accessing
Resource information is in the cell to be polymerized to the network side initiating random access procedure；
Or, the UE according to the random access resource information in the specified time in the cell to be polymerized to institute
Network side initiating random access procedure is stated, and entrance simultaneously can receive the state of downstream message；
Or, the UE according to the random access resource information in the specified time in the cell to be polymerized to institute
Network side initiating random access procedure is stated, and entrance can receive descending disappear after the accidental access response of the network side is received
The state of breath.
Preferably, the network side indicates the UE in cell to be polymerized in can by the current serving cells of UE
The state of downstream message is received, is：
The lateral UE of the network sends the instruction message for carrying activation MAC control elements.
Preferably, the UE is received after the instruction message, and methods described also includes：
The UE enters can receive the state of downstream message, and voluntarily selection random access resource letter in cell to be polymerized
Breath is in the cell to be polymerized to the network side initiating random access procedure；
Or, the UE voluntarily selects random access resource information to be initiated in the cell to be polymerized to the network side
Random access procedure, and entrance can receive the state of downstream message in cell to be polymerized.
Preferably, the UE is completed after uplink synchronous in the cell to be polymerized, and method also includes：
The UE sends Physical Uplink Shared Channel PUSCH message in the cell to be polymerized to base station, notifies described
Cell to be polymerized completes uplink synchronous described in network side；Wherein, carried in the PUSCH message described to be polymerized small
The Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI, Cell Radio Network Temporary Identifier) in area.
Uplink synchronous system in a kind of multi-carrier communications systems, including network side and UE, wherein,
Network side, can be received down for indicating that the UE is in cell to be polymerized by serving cell current UE
The state of row message；And, after the UE completes Stochastic accessing in cell to be polymerized, sent to the UE for up
Synchronous uplink synchronous instruction time information；
UE, for completing uplink synchronous in cell to be polymerized in the uplink synchronous instruction time.
Preferably, the UE is in that can receive the state of downstream message in cell to be polymerized：
The UE can receive the state of the message used in random access procedure in cell to be polymerized；
Or, the UE can receive the state of all downstream messages in cell to be polymerized.
Preferably, the network side is further used for, and is sent by serving cell current UE to the UE by PDCCH's
What physical layer signaling was carried can receive the instruction message of downstream message for indicating that the UE is in cell to be polymerized；Institute
State the random access resource information for indicating that cell to be polymerized described in the UE Stochastic accessings is carried in message.
Preferably, the UE is received after the instruction message, is further used for,
The state of downstream message that can receive is directly entered in cell to be polymerized, and is believed according to the random access resource
Breath is in the cell to be polymerized to the network side initiating random access procedure；
Or, according to the random access resource information in the specified time in the cell to be polymerized to the network
Side initiating random access procedure, and entrance simultaneously can receive the state of downstream message；
Or, according to the random access resource information in the specified time in the cell to be polymerized to the network
Side initiating random access procedure, and entrance can receive the shape of downstream message after the accidental access response of the network side is received
State.
Preferably, the network side is further used for, and the instruction for carrying activation MAC control elements to UE transmissions disappears
Breath.
Preferably, the UE is received after the instruction message, is further used for：
The state of downstream message can be received into cell to be polymerized, and voluntarily selects random access resource information in institute
Cell to be polymerized is stated to the network side initiating random access procedure；
Or, voluntarily select random access resource information to initiate to connect at random to the network side in the cell to be polymerized
Enter process, and entrance can receive the state of downstream message in cell to be polymerized.
In the present invention, when needing to activate secondary cell (cell to be polymerized) for UE, network side is worked as firstly the need of by UE
Preceding serving cell indicates that the UE, in that can receive the state of downstream message, is then sent in cell to be polymerized to the UE
For the random access resource of Stochastic accessing, such as random access lead code makes UE complete Stochastic accessing in secondary cell to be added
Process.Network side is again by accidental access response etc. by for indicating UE in the up same of the secondary cell uplink synchronous to be added
Instruction time (TA) is walked, UE is completed uplink synchronous in the secondary cell to be added, into up-downgoing normal data reiving/transmitting state.
The present invention realizes the secondary cell uplink synchronous in LTE-Advanced systems, and mode is simple and quick.
Brief description of the drawings
Fig. 1 for the embodiment of the present invention one multi-carrier communications systems in uplink synchronisation method flow chart；
Fig. 2 for the embodiment of the present invention two multi-carrier communications systems in uplink synchronisation method flow chart；
Fig. 3 for the embodiment of the present invention three multi-carrier communications systems in uplink synchronisation method flow chart；
Fig. 4 for the embodiment of the present invention four multi-carrier communications systems in uplink synchronisation method flow chart；
Fig. 5 for the embodiment of the present invention five multi-carrier communications systems in uplink synchronisation method flow chart；
Fig. 6 for the embodiment of the present invention six multi-carrier communications systems in uplink synchronisation method flow chart.
Embodiment
The present invention basic thought be：When needing to add secondary cell (cell to be polymerized) for UE, network side is needed first
The state of downstream message can be received by indicating that the UE is in cell to be polymerized by serving cell current UE, then
The resource for Stochastic accessing is sent to the UE, such as random access lead code makes UE complete to connect at random in secondary cell to be added
Enter process.Network side is again by accidental access response etc. by for indicating UE in the up of the secondary cell uplink synchronous to be added
The synchronizing indication time (TA), UE is set to complete uplink synchronous in the secondary cell to be added.
To more fully understand the present invention, technical scheme is described in further detail.
The definition of two states is provided in the present invention：
State 1：Serving cell starts downlink data reception, can be only limited to RACH (RACH, Random
Access Channel) during msg2, msg4 Physical Downlink Control Channel (PDCCH, Physical Downlink
Control Channel) and physical layer descending shared channel (PDS CH, Physical Downlink shared Channel)
Receive, or can allow to receive all descending related PDCCH message and PDSCH message, now think that serving cell is descending
It is synchronous.I.e., in state 1, UE can realize in above-mentioned msg2, msg4 message and PDSCH of PDCCH carryings the msg2 that carries and
The reception of msg4 message, or all message of PDCCH and PDSCH carryings can be received.
State 2：Serving cell starts comprehensive downlink data reception and the transmission of upstream data, and UE can be in the clothes
Interception reference signal (SRS, Sounding Reference Signal) is sent to base station, report physical layer to measure in business cell
Information (CQI (Channel Quality Indicator)/PMI (Precoding Matrix Indicator)/RI (Rank
Index))。
Technical scheme provides two kinds of implementation methods, wherein, the technical scheme that method one is related to is：At UE
When RRC connection status, the initial uplink that base station or UE initiate some auxiliary serving cell is synchronous, and the auxiliary serving cell enters state
1, base station initiates that MAC control elements need not be sent to UE during the initial uplink synchronization of the cell.UE is initiated after instruction is received
The uplink synchronous process of the serving cell.The serving cell enters state 2 after the completion of synchronizing process.Or UE is without state 1
It is directly entered state 2.The step of realizing of this method can use for reference the synchronous implementation process of LTE system, therefore can effectively reduce
The synchronous complexity of cell uplink.
The technical scheme that method two is related to is：When UE is in RRC connection status, base station is to a certain uplink synchronous that needs
Auxiliary serving cell sends the MAC control elements of activation auxiliary serving cell, and UE auxiliary serving cells after application MAC control elements are entered
Enter state 1, next can immediately begin to carry out uplink synchronous to the serving cell.The promoter of synchronizing process can be base
Stand or user equipment.After the serving cell completes uplink synchronous process, the auxiliary serving cell enters state 2.
By the present invention, user terminal and base station clearly a certain serving cell can be initiated up initial synchronisation when
Machine；User equipment can determine to intercept downstream signal on the serving cell, interception reference signal is sent to base station, physics is reported
The opportunity of layer metrical information (CQI/PMI/RI).
In the present invention, after in state 1, for follow-up downstream message, network side can pass through UE current services
Cell is sent, and can also be sent by the cell to be polymerized.After state 2 to be in, UE, which is sent to the up of network side, to disappear
Breath, can both be sent by UE former serving cell, can also be sent by the cell to be polymerized of uplink synchronous.
Hereinafter, by specific example, the essence for technical scheme that the present invention is furture elucidated.
In the present invention, to be described exemplified by FDD (FDD, Frequency Division Duplex) pattern.
It will be appreciated by those skilled in the art that the implementation of time division duplex (TDD, Time Division Duplex) pattern is also phase
With, no longer repeat one by one.
In the present invention, by serving cell 1 (descending frequency f1, up frequency f1 '), referred to as CC1 (DL f1, UL f1 ')；Will
Serving cell 2 (descending frequency f2, up frequency f2 '), referred to as CC2 (DL f2, UL f2 '), CC1 (DL f1, UL f1 ') and
CC2 (DL f2, UL f2 ') can carry out carrier aggregation.UE is in RRC connection status on CC1 (current service cell) at present,
That is UE currently has uplink and downlink data to be transmitted in CC1.When UE is needed in the business transmission of multiple serving cells enterprising industry, in addition one
Individual serving cell (being assumed to be CC2) can directly configure random access resource by network side, and CC2 is carrying out transmitting uplink data
Before to need first to carry out initial uplink synchronous.In the present invention, UE and base station (network side) safeguard up on each serving cell respectively
Link synchronization.
Fig. 1 for the embodiment of the present invention one multi-carrier communications systems in uplink synchronisation method flow chart, as shown in figure 1,
Uplink synchronisation method specifically includes following steps in the multi-carrier communications systems of this example：
Step 101, when CC2 needs uplink synchronous, base station sends to UE on CC1 and indicates message, is such as believed by PDCCH
Road sends physical layer signaling (the carrying instruction message), and the physical layer signaling is existing PDCCH order or newly defined
CC2 random access resources information (such as random access code) is carried in physical layer signaling, the instruction message, and indicates this in the message
Carry information in message to be used by CC2, as that can indicate as being used CC2 by carrying carrier wave ID.
Step 102, UE after receiving that message, into state 1, i.e., (allows UE to have in the CC2 descending reception data that start
Certain processing delay, i.e., k transmission time slot interval (TTI, Transmission Timing upon receiving the message
Interval in), k is specified by agreement, such as LTE FDD systems, and k=4 can be set), before being indicated on CC2 with base station
Leading code and resource are initiated to start random access procedure in the specified time；
Or, UE after receiving that message, initiated in the specified time by the lead code and resource indicated on CC2 with base station
Start RACH processes, and CC2 enters state 1 at the time of Stochastic accessing is initiated.
Or, UE after receiving that message, initiated in the specified time by the lead code and resource indicated on CC2 with base station
Start random access procedure, and when receiving accidental access response (Random Access Response), CC2 enters state 1.
CC2 enters state 1, i.e. UE and enters state 1 in CC2.
Or, UE is received after the message, and into state 2, RACH processes are then initiated on CC2.
Step 103, base station sends accidental access response to UE on CC2 after the lead code of the Stochastic accessing is received and disappeared
Synchronous adjustment (TA) information is carried in breath, the message.
Step 104, the synchronous adjustment information (TA) in UE applications accidental access response message completes CC2 uplink synchronous mistake
Journey, CC2 enters state 2.
Fig. 2 for the embodiment of the present invention two multi-carrier communications systems in uplink synchronisation method flow chart, as shown in Fig. 2
Uplink synchronisation method specifically includes following steps in the multi-carrier communications systems of this example：
Step 201, when CC2 needs uplink synchronous, UE initiating random access procedures on CC2, using common preamble code.
Step 202, base station sends to UE after the lead code is received and carries synchronous in accidental access response message, the message
Adjustment information.
Step 203, the synchronous adjustment information (TA) in UE applications accidental access response message, CC2 enters state 1, and
Upstream message is sent to base station, UE C-RNTI is carried.
Step 204, base station solves conflict, and replys contention resolution message to UE.
Step 205, UE receives contention resolution message, CC2 uplink synchronous is completed, into state 2.
Fig. 3 for the embodiment of the present invention three multi-carrier communications systems in uplink synchronisation method flow chart, as shown in figure 3,
Uplink synchronisation method specifically includes following steps in the multi-carrier communications systems of this example：
Step 301, when CC2 needs uplink synchronous, base station sends message on CC1 to UE, and the message carries activation MAC
Control element.CC2 uplink synchronous indicates using hidden to show and explicit two mode.Implicit：Activate after CC2 i.e. to CC2
Carry out uplink synchronous；Display mode：The sign for indicating that CC2 is synchronous is carried in control element.
Step 302, UE applies the MAC control elements, and CC2 enters state 1.
Base station can send to UE on CC2 and indicate message, the physical layer signaling such as sent by PDCCH channels, the thing
Reason layer signaling can be carrying CC2 Stochastic accessings in existing PDCCH order or the physical layer signaling newly defined, the message
Information, such as lead code.
Step 303, the lead code and random access resource that UE is distributed using base station initiate Stochastic accessing on CC2；
Step 304, base station sends accidental access response message on CC2 to UE, wherein the TA adjustment information comprising CC2.
Step 305, UE receives accidental access response message, and CC2 applies the TA, completes the CC2 synchronous mistake of initial uplink
Journey, now CC2 enter state 2.
Fig. 4 for the embodiment of the present invention four multi-carrier communications systems in uplink synchronisation method flow chart, as shown in figure 4,
Uplink synchronisation method specifically includes following steps in the multi-carrier communications systems of this example：
Step 401, when CC2 needs uplink synchronous, base station sends message on CC1 to user equipment, and the message is carried
Activate MAC control elements.CC2 uplink synchronous indicates using hidden to show and explicit two mode.Implicit：Activate after CC2
Uplink synchronous is carried out to CC2；Display mode：The sign for indicating that CC2 is synchronous is carried in control element.
Step 402, the MAC control elements in UE application messages, CC2 enters state 1.UE voluntarily selects random access guiding
Code initiates RACH processes on CC2；
Or, UE applies the MAC control elements, and voluntarily selection random access lead code initiates RACH processes on CC2,
Now CC2 enters state 1.
Step 403, base station receives and sends accidental access response message, message to UE on CC2 after the lead code that UE is sent
Middle carrying time adjustment information TA；
Step 404, UE applies the TA values after accidental access response message is received in CC2, now CC2 enters state 2.
Step 405, because base station is now not aware that CC2 is completed as UE auxiliary serving cell initiating random access procedure
Uplink synchronous, so now UE can be on CC2 to the up PUSCH message of base station transmission, and includes UE C- in the message
RNTI is identified, notify base station this to be a CC2 as auxiliary serving cell complete uplink synchronous process；
Step 406, base station is received after the PUSCH message that UE is sent on CC2, according to the C-RNTI information included in message
The reason for learning UE initiating random access procedures is synchronous in order to set up CC2 initial uplink.Base station can be according to circumstances in CC2
On to UE send downlink data or indicate UE uplink authorization informations.
Step 407, UE completes CC2 uplink synchronous.
Fig. 5 for the embodiment of the present invention five multi-carrier communications systems in uplink synchronisation method flow chart, as shown in figure 5,
Uplink synchronisation method specifically includes following steps in the multi-carrier communications systems of this example：
Step 501, when CC2 needs uplink synchronous, base station sends message on CC1 to user equipment, and the message is carried
Activate MAC control elements.CC2 uplink synchronous indicates using hidden to show and explicit two mode.Wherein, implicit can be with
For：Activate and uplink synchronous is carried out to CC2 after CC2；Display mode can be：The mark for indicating that CC2 is synchronous is carried in control element
Show.
Step 502, the MAC control elements in UE application messages, into state 1.If being now configured with cross-
Scheduling, the physical layer signaling that base station can be sent on CC1 by PDCCH channels (can be existing PDCCH
Order or the physical layer signaling newly defined) middle carrying CC2 random access informations, such as lead code.
Step 503, UE is have received in CC1 after the PDCCH message for carrying lead code, using the lead code obtained on CC2
Initiating random access procedure；
Step 504, base station, which is received after lead code, sends on CC2 to UE when being carried in accidental access response message, message
Between adjustment information TA；
Step 505, UE applies the TA values after accidental access response message is received in CC2, and now CC2 is synchronously completed,
CC2 enters state 2.
Fig. 6 for the embodiment of the present invention six multi-carrier communications systems in uplink synchronisation method flow chart, as shown in fig. 6,
Uplink synchronisation method specifically includes following steps in the multi-carrier communications systems of this example：
Step 601, when CC2 needs uplink synchronous, base station sends message on CC1 to user equipment, and the message is carried
Activate MAC control elements.CC2 uplink synchronous indicates using hidden to show and explicit two mode.Implicit：Activate after CC2
Uplink synchronous is carried out to CC2；Display mode：The sign for indicating that CC2 is synchronous is carried in control element.Base station is simultaneously in the message
The preamble information of middle carrying CC2 initiating random access procedures；
Step 602, the MAC control elements in UE application messages, CC2 enters state 1.UE is used before being received on CC1
Leading code initiating random access procedure on CC2；
Step 603, base station, which is received after lead code, sends on CC2 to UE when being carried in accidental access response message, message
Between adjustment information TA；
Step 604, UE applies the TA values after accidental access response message is received in CC2, and now CC2 is synchronously completed,
CC2 enters state 2.
The present invention describes uplink synchronous system in a kind of multi-carrier communications systems, including network side and UE simultaneously, wherein,
Network side, can be received down for indicating that the UE is in cell to be polymerized by serving cell current UE
The state of row message；And, after the UE completes Stochastic accessing in cell to be polymerized, sent to the UE for up
Synchronous uplink synchronous instruction time information；
UE, for completing uplink synchronous in cell to be polymerized in the uplink synchronous instruction time.
Above-mentioned UE is in cell to be polymerized can receive the state of downstream message, be：
The UE can receive the state of the message used in random access procedure in cell to be polymerized；
Or, the UE can receive the state of all downstream messages in cell to be polymerized, i.e., current UE is to be polymerized
Cell in realize down-going synchronous, all downstream messages of network side can be received.
The network side is further used for, and the physical layer by PDCCH is sent to the UE by serving cell current UE
Being used for of signaling bear indicates the UE in cell to be polymerized in can receive the instruction message of downstream message；It is described to indicate
The random access resource information of cell to be polymerized described in the UE Stochastic accessings is carried in message.
The UE is received after the instruction message, is further used for,
The state of downstream message that can receive is directly entered in cell to be polymerized, and is believed according to the random access resource
Breath is in the cell to be polymerized to the network side initiating random access procedure；
Or, according to the random access resource information in the specified time in the cell to be polymerized to the network
Side initiating random access procedure, and entrance simultaneously can receive the state of downstream message；
Or, according to the random access resource information in the specified time in the cell to be polymerized to the network
Side initiating random access procedure, and entrance can receive the shape of downstream message after the accidental access response of the network side is received
State.
Or, the network side is further used for, and the instruction for carrying activation MAC control elements to UE transmissions disappears
Breath.The UE is received after the instruction message, is further used for：
The state of downstream message can be received into cell to be polymerized, and voluntarily selects random access resource information in institute
Cell to be polymerized is stated to the network side initiating random access procedure；
Or, voluntarily select random access resource information to initiate to connect at random to the network side in the cell to be polymerized
Enter process, and entrance can receive the state of downstream message in cell to be polymerized.
It will be appreciated by those skilled in the art that each network element in uplink synchronous system in the multi-carrier communications systems of the present invention
The details of function, reference can be made in foregoing multi-carrier communications systems the associated description of uplink synchronisation method and understand.The present invention
Multi-carrier communications systems in uplink synchronous system change is had no to existing network system, but to the work(of related network elements therein
It can be extended.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (11)
1. uplink synchronisation method in a kind of multi-carrier communications systems, it is characterised in that methods described includes：
Network side indicates that the UE is in cell to be polymerized by the current serving cell of user equipment (UE) to be received down
The state of row message；
The network side is sent for uplink synchronous after the UE completes Stochastic accessing in cell to be polymerized to the UE
Uplink synchronous instruction time information；
The UE completes uplink synchronous in the uplink synchronous instruction time in cell to be polymerized；
Wherein, the network side indicates that the UE is in cell to be polymerized by serving cell current UE to receive down
The state of row message, be：
The network side is sent by PDCCH physical layer signaling carrying for referring to by serving cell current UE to the UE
The instruction message of downstream message can be received by showing that the UE is in cell to be polymerized；Carried in the instruction message described
The random access resource information of cell to be polymerized described in UE Stochastic accessings.
2. according to the method described in claim 1, it is characterised in that the UE is in cell to be polymerized can receive descending
The state of message, be：
The UE can receive the state for the message that random access procedure is used in cell to be polymerized；
Or, the UE can receive the state of all downstream messages in cell to be polymerized.
3. according to the method described in claim 1, it is characterised in that the UE is received after the instruction message, methods described
Also include：
The UE is directly entered the state of downstream message that can receive in cell to be polymerized, and according to the random access resource
Information is in the cell to be polymerized to the network side initiating random access procedure；
Or, the UE according to the random access resource information in the specified time in the cell to be polymerized to the net
Network side initiating random access procedure, and entrance simultaneously can receive the state of downstream message；
Or, the UE according to the random access resource information in the specified time in the cell to be polymerized to the net
Network side initiating random access procedure, and entrance can receive downstream message after the accidental access response of the network side is received
State.
4. method according to claim 1 or 2, it is characterised in that the network side is referred to by the current serving cells of UE
Show that the UE, in that can receive the state of downstream message, is in cell to be polymerized：
The lateral UE of the network sends the instruction message for carrying activation MAC control elements.
5. method according to claim 4, it is characterised in that the UE is received after the instruction message, methods described
Also include：
The UE enters can receive the state of downstream message in cell to be polymerized, and voluntarily selection random access resource information exists
The cell to be polymerized is to the network side initiating random access procedure；
Or, the UE voluntarily selects random access resource information to initiate random to the network side in the cell to be polymerized
Access procedure, and entrance can receive the state of downstream message in cell to be polymerized.
6. method according to claim 5, it is characterised in that the UE completes up same in the cell to be polymerized
After step, method also includes：
The UE sends Physical Uplink Shared Channel PUSCH message in the cell to be polymerized to base station, notifies the network
Cell to be polymerized completes uplink synchronous described in side；Wherein, the cell to be polymerized is carried in the PUSCH message
Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI.
7. uplink synchronous system in a kind of multi-carrier communications systems, including network side and UE, it is characterised in that：
Network side, descending disappear can be received for indicating that the UE is in cell to be polymerized by serving cell current UE
The state of breath；And, after the UE completes Stochastic accessing in cell to be polymerized, sent to the UE for uplink synchronous
Uplink synchronous instruction time information；
UE, for completing uplink synchronous in cell to be polymerized in the uplink synchronous instruction time；
Wherein, network side is held specifically for being sent by serving cell current UE to the UE by PDCCH physical layer signaling
What is carried can receive the instruction message of downstream message for indicating that the UE is in cell to be polymerized；In the instruction message
Carry the random access resource information of cell to be polymerized described in the UE Stochastic accessings.
8. system according to claim 7, it is characterised in that the UE is in cell to be polymerized can receive descending
The state of message, be：
The UE can receive the state of the message used in random access procedure in cell to be polymerized；
Or, the UE can receive the state of all downstream messages in cell to be polymerized.
9. system according to claim 7, it is characterised in that the UE is received after the instruction message, is further used
In,
The state of downstream message that can receive is directly entered in cell to be polymerized, and is existed according to the random access resource information
The cell to be polymerized is to the network side initiating random access procedure；
Or, sent out according to the random access resource information in the specified time in the cell to be polymerized to the network side
Random access procedure is played, and entrance simultaneously can receive the state of downstream message；
Or, sent out according to the random access resource information in the specified time in the cell to be polymerized to the network side
Random access procedure is played, and entrance can receive the state of downstream message after the accidental access response of the network side is received.
10. the system according to claim 7 or 8, it is characterised in that the network side is further used for, sends out to the UE
Send the instruction message for carrying activation MAC control elements.
11. system according to claim 10, it is characterised in that the UE is received after the instruction message, further
For：
The state of downstream message can be received into cell to be polymerized, and voluntarily selection random access resource information is treated described
The cell of polymerization is to the network side initiating random access procedure；
Or, voluntarily select random access resource information to initiate Stochastic accessing mistake to the network side in the cell to be polymerized
Journey, and entrance can receive the state of downstream message in cell to be polymerized.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110111834.6A CN102761954B (en) | 2011-04-29 | 2011-04-29 | Uplink synchronisation method and system in multi-carrier communications systems |
| PCT/CN2012/074471 WO2012146154A1 (en) | 2011-04-29 | 2012-04-20 | Uplink synchronization method and system in multi-carrier communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110111834.6A CN102761954B (en) | 2011-04-29 | 2011-04-29 | Uplink synchronisation method and system in multi-carrier communications systems |
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| CN102761954B true CN102761954B (en) | 2017-09-29 |
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| CN104303554B (en) * | 2013-05-15 | 2018-06-15 | 华为技术有限公司 | A kind of means of communication, base station and user equipment |
| CN103354528B (en) * | 2013-06-28 | 2017-05-03 | 北京智谷睿拓技术服务有限公司 | Method and device for multi-stream synchronization |
| CN105103586B (en) * | 2014-01-23 | 2019-05-07 | 华为技术有限公司 | Communication means, user equipment and base station |
| CN105187177B (en) * | 2014-06-05 | 2019-10-01 | 中兴通讯股份有限公司 | Data transmission block sending, receiving method and device |
| WO2016183816A1 (en) * | 2015-05-20 | 2016-11-24 | 华为技术有限公司 | Communication method and device |
| CN106714295B (en) * | 2015-07-15 | 2020-11-17 | 中兴通讯股份有限公司 | Data transmission method and device |
| US11064378B2 (en) * | 2015-07-16 | 2021-07-13 | Zte Wistron Telecom Ab | Measurement-based random access configuration |
| CN106941717B (en) * | 2016-01-04 | 2021-02-12 | 中兴通讯股份有限公司 | Fault reporting method and device |
| CN108886780A (en) * | 2016-03-31 | 2018-11-23 | 株式会社Ntt都科摩 | User terminal, wireless base station and wireless communications method |
| CN112369105A (en) * | 2018-08-31 | 2021-02-12 | 富士通株式会社 | Random access method, data receiving method and device and communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101888648A (en) * | 2009-05-11 | 2010-11-17 | 大唐移动通信设备有限公司 | Uplink synchronous control method and device |
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| CN100421365C (en) * | 2004-08-14 | 2008-09-24 | 华为技术有限公司 | Method for realizing user equipment wireless resource control |
| CN101400150B (en) * | 2007-09-25 | 2011-01-19 | 中兴通讯股份有限公司 | Random access method for multi-carrier TD-SCDMA system |
| KR101611271B1 (en) * | 2008-10-29 | 2016-04-26 | 엘지전자 주식회사 | An uplink random access method under a carrier aggregation environment |
| CN101772185B (en) * | 2009-01-06 | 2012-06-06 | 电信科学技术研究院 | Random access processing method and equipment in long-term evolution upgrading multi-carrier polymerizing system |
| CN101777941B (en) * | 2009-01-12 | 2014-10-08 | 华为技术有限公司 | Downlink mode of transmission, network devices and wireless device in the coordinated multiple-point transmission systems |
| CN102036411B (en) * | 2010-12-02 | 2013-06-26 | 大唐移动通信设备有限公司 | Method and device for random access |
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| CN101888648A (en) * | 2009-05-11 | 2010-11-17 | 大唐移动通信设备有限公司 | Uplink synchronous control method and device |
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