CN102917469B - The method and system of auxiliary serving cell access, network side element, user equipment - Google Patents
The method and system of auxiliary serving cell access, network side element, user equipment Download PDFInfo
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- CN102917469B CN102917469B CN201110218431.1A CN201110218431A CN102917469B CN 102917469 B CN102917469 B CN 102917469B CN 201110218431 A CN201110218431 A CN 201110218431A CN 102917469 B CN102917469 B CN 102917469B
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- random access
- serving cell
- upstream data
- network side
- opportunity
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
-
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
Abstract
The invention discloses a kind of methods of auxiliary serving cell access, including：The uplink authorization opportunity that user equipment (UE) is notified in network side sends random access guiding or upstream data by auxiliary serving cell to the network side；The network side calculates time adjustment TA according to the random access guiding or upstream data received, and feeds back to the UE；After the UE obtains the TA, data transmit-receive is carried out in the auxiliary serving cell.The present invention discloses a kind of systems and network side element, user equipment of method that realizing aforementioned auxiliary serving cell access.Technical solution using the present invention, UE can shorten the time of access auxiliary serving cell, provide the business service of high speed for UE as early as possible.It is rapider that the present invention makes the Scell of UE access, and Scell accesses can be provided early for UE when UE business loads are heavier.
Description
Technical field
The present invention relates to the method for auxiliary serving cell access technology more particularly to a kind of access of efficient auxiliary serving cell and
System, network side element, user equipment.
Background technology
In radio honeycomb communication system, random access procedure (Random Access Procedure) is used for idle shape
Terminal (or being user equipment (UE, User Equipment)) the initial access network or connection status of state (RRC_IDLE)
(RRC_CONNECTED) terminal carries out uplink synchronous (Uplink synchronization) with network and obtains resource point
Match, to carry out subsequent data communications.
It is drilled for a long time in third generation partnership project (3GPP, Third Generation Partnership Project)
Into universal land radio access web (E-UTRAN, the Evolved of the evolution of (LTE, Long Term Evolution) system
Universal Terrestrial Radio Access Network) in, six kinds of events can trigger the random of UE and connect below
Enter process：(1) idle state is initially accessed；(2) radio resource control connection reestablishment process (RRC Connection Re-
establishment procedure)；(3) switch (HO, Handover)；(4) RRC connection status downlink data, which reaches, needs
Random access procedure, such as when uplink sync status is " asynchronous "；(5) RRC connection status upstream data reach need with
Machine access procedure, for example, when uplink sync status be " asynchronous " or without available Physical Uplink Control Channel (PUCCH,
Physical Uplink Control Channel) resource transmission scheduling request (SR, Schedule Request)；(6)RRC
Connection status is that positioning purpose needs random access procedure, such as UE positioning to need timing advance (Timing Advance).With
There are two types of different forms for machine access procedure：(Contention Based) based on conflict (is suitable for first five above-mentioned kind thing
Part)；It is not based on (Non-Contention Based) (being suitable for above-mentioned (3), (4), (6) event) of conflict.In random access
After process success, normal downlink or uplink transmission can be carried out.
Random access procedure can be accessed by the media of Physical Downlink Control Channel signaling (PDCCH order) or UE and be controlled
Preparative layer (MAC, Medium Access Control) is initiated, optionally, PDCCH order or wireless heterogeneous networks (RRC,
Radio Resource Control) signaling can be that UE distributes special random access preamble (Random Access
Preamble), then random access procedure is the mode for being not based on conflict；Otherwise UE needs to select random access guiding, then at random
Access procedure is the mode based on conflict.It includes selection random access guiding and physical accidental access that UE, which selects random access resource,
The time-frequency domain resources etc. of channel (PRACH, Physical Random Access Channel).For the random access of non conflicting
Process does not have Conflict solving process.Fig. 1 is existing random access procedure schematic diagram, as shown in Figure 1, based on conflict
The random access procedure of (Contention based) mainly includes the following steps that：
Step 101, UE is sent at random in uplink by random access channel (RACH, Random Access CHannel)
Access lead (Random Access Preamble)；The opportunity that UE sends random access guiding is matched in system message broadcast
It sets, main configuration is frequency domain and time-domain resource, and wherein frequency domain configuration is that (frequency of PRACH is inclined by prach-FreqOffset
Move), when configuration of territory be prach-ConfigIndex (before which subframe on which upper frame of PRACH can send out random access
It leads).
Step 102, the media access control layer (MAC, Medium Access Control) of base station (eNB) generates random
Access response message is sent to UE in DSCH Downlink Shared Channel (DL-SCH, Downlink-Shared Channel)；The random access
In response message include at least random access guiding mark (RAPID, Random Access Preamble IDentifier),
Time adjust (TA, Time Alignment) information, initial uplink mandate (UL Grant, Uplink Grant) and temporarily it is small
Area-radio network temporary identifier (Temporary C-RNTI)；The accidental access response message is believed by being controlled in physical down
Random access-radio network temporary identifier (RA- on road (PDCCH, Phisical Downlink Control CHannel)
RNTI, Random Access-Radio Network Temporary Identifier) it is indicated；
Step 103, UE uplink share sent on transmission channel (UL-SCH, Uplink-Shared Channel) it is first
Scheduled transmission (Scheduled Transmission) message；The content of the scheduled transmission message includes at least cell-nothing
Line Network Temporary Identifier (C-RNTI), media access control first (MAC Control Element) or including Conflict solving mark
Know the public control logic channel Service Data Unit (CCCH SDU) of (Contention Resolution Identity)；It should
Hybrid automatic repeat-request (HARQ, Hybrid Automatic Retransmission are supported in the transmission of scheduled transmission message
reQuest)；
Step 104, base station sends contention resolution message (Contention Resolution) on DL-SCH；The conflict
It solves message to be indicated by the C-RNTI or interim C-RNTI on PDCCH, may include Conflict solving mark；The message
It sends and supports HARQ.
Above-mentioned steps 103 and step 104 are for solving conflict.Six things of the random access procedure of above-mentioned triggering UE
In part, wherein the arrival of (4) RRC connection status downlink datas needs random access procedure, and (5) RRC connection status upstream datas
Arrival needs random access procedure, can trigger Scell and execute random access procedure, but is not excluded for other events triggering Scell
Triggering executes random access procedure when executing random access procedure such as Scell activation.
To provide higher data rate, senior long term evolution (LTE-A, Long Term Evolution to mobile subscriber
Advance) system proposes carrier aggregation technology (CA, Carrier Aggregation), and the purpose is to for respective capabilities
UE provide bigger broadband data transmission, improve the peak rate of UE.In LTE system, the maximum downstream transmission belt of system support
Width is 20MHz, and carrier wave polymerization is that the component carrier (CC, Component Carriers) of two or more is aggregating branch
It holds and is more than 20MHz, maximum is no more than the transmission bandwidth of 100MHz, and the sum configuration of initial stage UL CC is less than or equal to DL CC's
Sum configuration.LTE-A UE with carrier aggregation capacity, can simultaneously on multiple component carriers transceiving data, be related to below
UE in addition to illustrate all refer to such UE.In lte-a system, UE can while be carried after entering connected state by multiple components
Wave (such as CC1, CC2) is communicated with source base station, and base station can be UE specified one by explicit configuration or according to protocol conventions
A principal component carrier wave (PCC, Primary Component Carrier), other component carriers be known as auxiliary component carrier (SCC,
Secondary Component Carrier), the serving cell on PCC is known as main serving cell (Pcell, Primary
Cell), the serving cell on SCC is known as auxiliary serving cell (Scell, Secondary Cell).Auxiliary serving cell is in UE
Base station configures after into connected state.Under normal circumstances, some serving cell is all to have symmetrical uplink and downlink (Scell can
With only configurating downlink), it explicitly points out in system information block SIB2, in order to avoid the interference of control channel, introduces cross-carrier
The concept of scheduling, i.e., when the PDCCH of some Scell interference is compared under serious situation, the PDCCH of the Scell is not just enabled, and
It is the PDSCH that the Scell is dispatched by another serving cell, another serving cell here can pass through RRC
Signal deployment.Base station is only that UE distributes a C-RNTI, i.e., the C-RNTI of each serving cell is identical.
According to Rel10, in the carrier wave polymerization initial stage stage, the number of Scell is fewer such as only 1, and scene also has
It is limited to if do not supported uplink RRH and repeater, therefore only exists a TA, UE only needs to initiate uplink synchronous in Pcell
, and will not be initiated on Scell.Follow-up phase, due to the promotion of Scell data volumes, the number of Scell can increase as increased
4 are added to, scene can also relax as supported uplink RRH and repeater, and a TA cannot be solved the problems, such as at this time, therefore can be drawn
Enter multiple TA.At this point, can also initiate uplink synchronous on Scell, and random access procedure is just executed after Scell activation,
Scell must could carry out normal upstream data transmitting-receiving after the completion of uplink synchronous.If what is executed on Scell is non conflicting
Random access procedure, then the time is shorter, if execute be conflict random access procedure, the time will be long.For
Raising user experience shortens the random access procedure of conflict, or accelerates Scell to send upstream data to be necessary.
Invention content
In view of this, the main purpose of the present invention is to provide a kind of method and system of auxiliary serving cell access, networks
Side network element, user equipment can make Scell fast implement access when needing using Scell.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of method of auxiliary serving cell access, including：
User equipment (UE) is small by auxiliary service on the opportunity for sending upstream data or random access guiding that network side notifies
Area sends upstream data or random access guiding to the network side；
After the UE receives the time adjustment TA of network side feedback, the access of the auxiliary serving cell is completed.
Preferably, the TA is the network side according to the UE random access guidings sent or the upstream data meter
It is fed back after calculation.
Preferably, the opportunity of the transmission upstream data or random access guiding is that the network side is that the UE is determined
Earliest random access guiding or upstream data send opportunity.
Preferably, the opportunity for sending upstream data or random access guiding is described in satisfaction in present frame or next frame
Send the subframe of the opportunity condition of upstream data or random access guiding.
Preferably, the method further includes：
The UE receives the opportunity to the transmission upstream data or random access guiding that the network side is sent together
Notice and activation command to the auxiliary serving cell notice；Alternatively, the UE receives the network side described in transmission
The notice on the opportunity to the transmission upstream data or random access guiding sent after the activation command of auxiliary serving cell.
Preferably, the method further includes：
UE determines that auxiliary serving cell need to use different TA from main serving cell；
Alternatively, the UE receives the auxiliary serving cell that the network side is sent need to use different TA from main serving cell
Notice.
Preferably, the method further includes：
The UE notifies the network side to need that the auxiliary serving cell or needs is activated to obtain by the main serving cell
Take the TA of the auxiliary serving cell.
Preferably, the network side is base station.
A kind of method of auxiliary serving cell access, including：
Network side notifies UE to send the opportunity of upstream data or random access guiding；
The network side receives the UE by auxiliary serving cell to after the upstream data or random access guiding of transmission, meter
It calculates TA and feeds back to the UE, make the UE access to the auxiliary serving cell.
Preferably, the opportunity of the transmission upstream data or random access guiding is that the network side is that the UE is determined
Earliest random access guiding or upstream data send opportunity.
Preferably, the method further includes：
Laterally the UE sends leading to the opportunity of the transmission upstream data or random access guiding to the network together
Know and the notice of activation command to the auxiliary serving cell；Alternatively, the network side is sending swashing for the auxiliary serving cell
The rear notice that the opportunity to the transmission upstream data or random access guiding is sent to the UE of life order.
Preferably, the method further includes：
The network side notifies auxiliary serving cell described in the UE that need to use different TA from main serving cell.
A kind of system of auxiliary serving cell access, including UE and network side, wherein
Network side for calculating TA according to the random access guiding or upstream data that receive, and is sent to the UE；With
And the UE is notified to send the opportunity of upstream data or random access guiding；
UE, for the transmission upstream data or random access guiding opportunity by auxiliary serving cell to the network
Side sends random access guiding or upstream data；And after receiving the TA, the access of the auxiliary serving cell is completed.
Preferably, the opportunity of the transmission upstream data or random access guiding is that the network side is that the UE is determined
Earliest random access guiding or upstream data send opportunity.
Preferably, the uplink authorization opportunity is to meet the transmission upstream data in present frame or next frame or connect at random
Enter the subframe of leading opportunity condition.
Preferably, the network side is further used for, and is sent together to the transmission upstream data or random to the UE
The notice of the notice on the opportunity of access lead and activation command to the auxiliary serving cell；
Alternatively, the rear of notice in the activation command to the auxiliary serving cell is sent to the UE to sending upstream data
Or the notice on the opportunity of random access guiding.
Preferably, the UE is further used for, and determines that auxiliary serving cell need to use different TA from main serving cell；
Alternatively, the network side is further used for, it is different to notify that the UE auxiliary serving cells need to be used from main serving cell
TA。
Preferably, the UE is further used for,
The network side is notified to need to activate the auxiliary serving cell or need described in acquisition by the main serving cell
The TA of auxiliary serving cell.
A kind of network side element, including determination unit, receiving unit, computing unit and transmission unit；Wherein,
Determination unit, for determining the opportunity for sending upstream data or random access guiding for the UE；
Receiving unit, random access guiding or upstream data for receiving UE transmissions；
Computing unit, for calculating TA；
Transmission unit, for sending the TA to the UE；And to the UE send the transmission upstream data or with
The opportunity of machine access lead.
Preferably, the determination unit is further used for, the earliest random access guiding or uplink determined for the UE
Data send opportunity；Wherein, the uplink authorization opportunity be meet in present frame or next frame the transmission upstream data or with
The subframe of the opportunity condition of machine access lead.
A kind of user equipment, including transmission unit and access unit, wherein
Transmission unit on the opportunity for sending upstream data or random access guiding for being notified in network side, passes through auxiliary clothes
Cell of being engaged in sends random access guiding or upstream data to the network side；
Access unit completes the access of the auxiliary serving cell after receiving the TA that network side is sent.
In the present invention, when the Scell that base station is UE determines uplink authorization opportunity or sends leading opportunity, it can choose as possible
Early multi-upstream access opportunity, and not UE sends the common opportunity (such as the 1st subframe per frame) of uplink access preamble, in this way,
UE need not just wait long enough for carrying out access Scell again.It is rapider that the present invention makes the Scell of UE access, in UE business
When heavier loads Scell accesses can be provided for UE early.
Description of the drawings
Fig. 1 is existing random access procedure schematic diagram；
Fig. 2 is the flow chart of the method for auxiliary serving cell of the present invention access；
Fig. 3 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses；
Fig. 4 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses；
Fig. 5 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses；
Fig. 6 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses；
Fig. 7 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses；
Fig. 8 is the composed structure schematic diagram of the network side element of the embodiment of the present invention；
Fig. 9 is the composed structure schematic diagram of the user equipment of the embodiment of the present invention.
Specific implementation mode
The present invention basic thought be：The Scell that base station is UE, which is determined, sends uplink authorization opportunity or transmission random access
When leading opportunity, multi-upstream access opportunity as early as possible can be chosen, and not UE sends the common opportunity of uplink access preamble (such as
The 1st subframe per frame), in this way, UE need not just wait long enough for carrying out access Scell again.
It is right by the following examples and with reference to attached drawing to make the purpose of the present invention, technical solution and advantage be more clearly understood
The present invention is further described.
Fig. 2 is the flow chart of the method for auxiliary serving cell of the present invention access, as shown in Fig. 2, auxiliary serving cell of the present invention connects
The method entered mainly includes the following steps that：
Step 201, UE sends random access guiding or upstream data to base station；
Step 202, base station calculates TA according to the random access guiding or upstream data received, feeds back to UE, UE is got
After TA, can in the cell normal transceiving data.It base station can also be anti-together with TA by initial uplink mandate (UL Grant)
Feed UE.
Below by way of specific example, the essence for technical solution that the present invention is furture elucidated.
The application scenarios of the following embodiments of the present invention are that in lte-a system, base station 1 has carrier aggregation capacity
Base station.Two cells have been administered in base station 1, are Cell1 and Cell2 respectively.Some or all of in the two cells can to
Family equipment provides the ability of carrier wave polymerization to extend the bandwidth of transmission.UE1 by base station 1 has accessed network, and (or network is by UE
It is switched to base station 1), base station 1 is configured with two cells worked at the same time (Cell1, Cell2) according to the ability of UE1 for it, wherein
Cell1 provides the information such as NAS layer-two mobilities information such as PLMN, global cell identity CGI, Location Area Identification TAC for UE1, is UE1
Main plot (Pcell) or main serving cell, UE1 only receive the system message and paging message of main plot.Cell1, Cell2 can
To be RRH cells, the cell Jing Guo repeater or common cell.The two cells are FDD, for
The cell of TDD, flow are the same, are just not repeated to describe.
Embodiment one
In the present embodiment, Cell2 is that itself is scheduled itself, and the UE in Cell2 broadcast sends random access guiding
Opportunity be prach-FreqOffset=10, (subframe 1 of any one radio frames can by prach-ConfigIndex=3
Send out random access guiding).Fig. 3 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses, as shown in figure 3, this
The method of the auxiliary serving cell access of inventive embodiments mainly includes the following steps that：
Step 301, base station sends MAC CE to UE, including the order that Cell2 is activated, UE will after receiving order
Cell2 is activated.
Step 302, base station notice UE or UE knows that Cell2 and Cell1 is needed using not according to base station preconfigured information
Same TA needs to execute the process for obtaining TA on Cell2, while notifying UE, can be sent out in the subframe 5 of next radio frames
Playing random access guiding, (it is in order to which the subframe 1 in being broadcasted with system message distinguishes to select subframe 5 here, can be subframe 1
Any one subframe in addition, radio frames can also be current radio frames, and earliest feasible transmission opportunity is determined by base station,
And notify UE).Here random access guiding transmission opportunity can merge notice UE with activation command.
Step 303, UE executes the process for obtaining TA on Cell2, voluntarily selects a common preamble, passes through Cell2's
PRACH is sent to base station on specified opportunity.
Step 304, base station receives the common preamble, calculates TA, generates response message and is sent in the DL-SCH of Cell2
UE includes TA in the message, can also include uplink authorization；The message by RA-RNTI on the PDCCH on Cell2 (or
C-RNTI it) is indicated.
Step 305, after UE obtains the TA, it is believed that access Cell2 success, can on Cell2 normal transceiving data, and
Automatically forbid sending random access guiding in subframe 5.
In the present embodiment, if UE is at the appointed time not received by the reaction of base station, automatically in next radio frames
Given sub-frame such as subframe 5 on send random access guiding again, it is still failed by the trial of predetermined number of times, then abandon tasting
Examination.
Embodiment two
In the present embodiment, Cell2 is that itself is scheduled itself.Fig. 4 is that the auxiliary serving cell of the embodiment of the present invention connects
The flow chart of the method entered, as shown in figure 4, the method for the auxiliary serving cell access of the embodiment of the present invention includes mainly following step
Suddenly：
Step 401, base station sends MAC CE to UE, including the order that Cell2 is activated, UE will after receiving order
Cell2 is activated；
Step 402, base station notice UE or UE knows that Cell2 and Cell1 is needed using not according to base station preconfigured information
Same TA needs to execute the process for obtaining TA on Cell2, while notifying UE, and in the uplink authorization of Cell2, UE can awarded
The opportunity of power sends random access guiding or upstream data.Here uplink authorization can merge notice with activation command
UE。
Step 403, UE executes the process for obtaining TA on Cell2, voluntarily selects a common preamble, when specified
Machine is sent to base station by the UL SCH of Cell2, and UE can also send a upstream data to base station at this time；
Step 404, base station receives the common preamble or upstream data, calculates TA, generates response message Cell2's
DL-SCH is sent to UE, includes TA in the message, can also include uplink authorization；The message passes through on the PDCCH on Cell2
RA-RNTI (or C-RNTI) is indicated；
Step 405, after UE obtains the TA, it is believed that access Cell2 success, can on Cell2 normal transceiving data.
In the present embodiment, if UE is at the appointed time not received by the reaction of base station, abandon automatically.
Embodiment three
In the present embodiment, Cell2 is dispatched by Pcell, Cell2 broadcast in UE send random access guiding opportunity be
(subframe 1 of any one radio frames can be sent out to be connect at random by prach-FreqOffset=10, prach-ConfigIndex=3
Enter leading), Fig. 5 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses, as shown in figure 5, the present invention is implemented
The method of the auxiliary serving cell access of example mainly includes the following steps that：
Step 501, base station sends MAC CE to UE, including the order that Cell2 is activated, UE will after receiving order
Cell2 is activated；
Step 502, base station notice UE or UE knows that Cell2 and Cell1 is needed using not according to base station preconfigured information
Same TA needs to execute the process for obtaining TA on Cell2, while notifying UE, can be sent out in the subframe 5 of next radio frames
Playing random access guiding, (it is in order to which the subframe 1 in being broadcasted with system message distinguishes to select subframe 5 here, can be subframe 1
Any one subframe in addition, radio frames can also be current radio frames, and earliest feasible transmission opportunity is determined by base station,
And notify UE).Here random access guiding transmission opportunity can merge notice UE with activation command.
Step 503, UE executes the process for obtaining TA on Cell2, voluntarily selects a common preamble, passes through Cell2's
PRACH is sent to base station on specified opportunity.
Step 504, base station receives the common preamble, calculates TA, generates response message and is sent in the DL-SCH of Cell2
UE includes TA in the message, can also include uplink authorization；The message passes through the RA- on the relevant PDCCH of Cell2 on Pcell
RNTI (or C-RNTI) is indicated；
Step 505, after UE obtains the TA, it is believed that access Cell2 success, can on Cell2 normal transceiving data, and
Automatically forbid sending random access guiding in subframe 5.
Example IV
In the present embodiment, Cell1 is that itself is scheduled itself, and the UE in Cell2 broadcast sends random access guiding
Opportunity be prach-FreqOffset=10, (subframe 1 of any one radio frames can by prach-ConfigIndex=3
Send out random access guiding).Fig. 6 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses, as shown in fig. 6, this
The method of the auxiliary serving cell access of inventive embodiments mainly includes the following steps that：
Step 601, UE has upstream data arrival, and data volume is bigger, and Cell2 is in desynchronizing state at this time, and
Through deactivating, UE knows that Cell2 needs, using different TA, to need to obtain on Cell2 from Cell1 according to base station preconfigured information
Take TA；
Step 602, UE notifies base station by Pcell, needs to activate Cell2, or need to execute on Cell2 and obtain TA
Process；
Notification message, including needing the cell ID for activating or needing to obtain TA.
Step 603, MAC CE are sent to UE, including the order that Cell2 is activated, UE swash Cell2 after receiving order
It is living；
Step 604, base station notifies UE, random access guiding can be initiated in the subframe 5 of next radio frames and (selected here
It is in order to which the subframe 1 in being broadcasted with system message distinguishes to select subframe 5, can be any one subframe other than subframe 1, nothing
Line frame can also be current radio frames, earliest feasible transmission opportunity be determined by base station, and notify UE).Here random
Access lead transmission opportunity can merge notice UE with activation command.
Step 605：UE executes the process for obtaining TA on Cell2, voluntarily selects a common preamble, passes through Cell2's
PRACH is sent to base station on specified opportunity
Step 606：Base station receives the common preamble, calculates TA, generates response message and is sent in the DL-SCH of Cell2
UE includes TA in the message, can also include uplink authorization；The message by RA-RNTI on the PDCCH on Cell2 (or
C-RNTI it) is indicated；
Step 607：After UE obtains the TA, it is believed that access Cell2 success, can on Cell2 normal transceiving data, and
Automatically forbid sending random access guiding in subframe 5.
Embodiment five
In the present embodiment, Cell2 is dispatched by Pcell, Cell2 broadcast in UE send random access guiding opportunity be
(subframe 1 of any one radio frames can be sent out to be connect at random by prach-FreqOffset=10, prach-ConfigIndex=3
Enter leading).Fig. 7 is the flow chart for the method that the auxiliary serving cell of the embodiment of the present invention accesses, as shown in fig. 7, the present invention is implemented
The method of the auxiliary serving cell access of example mainly includes the following steps that：
Step 701, UE has downlink data arrival, and data volume is bigger, and Cell2 is in desynchronizing state at this time, and
It deactivating, base station notifies UE Cell2 to need to use different TA from Cell1, needs to execute acquisition TA processes on Cell2, this
When UE from the line activating Cell2；
Step 702, base station notify UE, can current radio frames or next radio frames subframe n (subframe n be just
The subframe of random access guiding can often be sent, it is subframe 4 that the present embodiment, which is that 3 subframes are exactly n after subframe 1) on initiate it is random
(3 subframe, that is, subframes 4 are in order to which the subframe 1 in being broadcasted with system message distinguishes to access lead after selecting normal sub-frames here
Come, can be any one subframe other than subframe 1, radio frames can also be current radio frames, be determined earliest by base station
Feasible transmission opportunity, and notify UE).Here random access guiding transmission opportunity can merge logical with activation command
Know UE.
Step 703, UE executes the process for obtaining TA on Cell2, voluntarily selects a common preamble, passes through Cell2's
PRACH is sent to base station on specified opportunity
Step 704, base station receives the common preamble, calculates TA, generates response message and is sent in the DL-SCH of Cell2
UE includes TA in the message, can also include uplink authorization；The message passes through the RA- on the relevant PDCCH of Cell2 on Pcell
RNTI (or C-RNTI) is indicated；
Step 705, after UE obtains the TA, it is believed that access Cell2 successes, under being received on the DL-SCH on Cell2
Row data are simultaneously normally fed back, and forbid sending random access guiding in subframe 4 automatically.
The present invention also describes a kind of system of auxiliary serving cell access, including UE and network side, wherein
UE, the uplink authorization opportunity for being notified in network side are connect by auxiliary serving cell to network side transmission at random
Enter leading or upstream data；And the TA of the network side feedback is obtained, carry out data transmit-receive in the auxiliary serving cell；
Network side for calculating time adjustment TA according to the random access guiding or upstream data that receive, and is fed back to
The UE；And notify the UE uplink authorizations opportunity.
It will be appreciated by those skilled in the art that the system of the auxiliary serving cell access of the present invention is not to existing communication network
Structure is improved, and is only improved the function and interactive mode of subnetwork network element, hereinafter, by the portion to making improvements
Divide and is described in detail.
In the system of the auxiliary serving cell access of the present invention, the uplink authorization opportunity is that the network side is that the UE is true
Fixed earliest random access guiding or upstream data sends opportunity.
In the system of the auxiliary serving cell access of the present invention, the uplink authorization opportunity is the in present frame or next frame
Subframe after one subframe.
In the system of the auxiliary serving cell access of the present invention, the network side is further used for, and is sent together to the UE
The notice of notice to the uplink authorization opportunity and the activation command to the auxiliary serving cell；Alternatively, to the auxiliary clothes
The rear notice sent to the UE to the uplink authorization opportunity of the notice of the activation command for cell of being engaged in
In the system of the auxiliary serving cell access of the present invention, UE is further used for, and determines that auxiliary serving cell and main service are small
Area need to use different TA；
Alternatively, the network side is further used for, it is different to notify that the UE auxiliary serving cells need to be used from main serving cell
TA。
Above-mentioned network side element is primarily referred to as base station.
Fig. 8 is the composed structure schematic diagram of the network side element of the embodiment of the present invention, as shown in figure 8, the embodiment of the present invention
Network side element include determination unit 80, receiving unit 81, computing unit 82 and transmission unit 83；Wherein,
Determination unit 80, for determining the opportunity for sending upstream data or random access guiding for the UE；
Receiving unit 81, random access guiding or upstream data for receiving UE transmissions；
Computing unit 82, for calculating TA；
Transmission unit 83, for sending the TA to the UE；And to the UE send the transmission upstream data or
The opportunity of random access guiding.
Above-mentioned determination unit 80 is further used for, the earliest random access guiding or upstream data hair determined for the UE
Send opportunity；Wherein, the uplink authorization opportunity is to meet the transmission upstream data or random access in present frame or next frame
The subframe of leading opportunity condition.
Above-mentioned network side element is primarily referred to as base station.
Before art technology should be appreciated that the realization function of managing unit everywhere in network side element shown in Fig. 8 can refer to
It states the associated description of the method and system of access control and understands.Its function can be by running on the program on processor by reality
It is existing, it can also be realized by specific logic circuit.
Fig. 9 is the composed structure schematic diagram of the user equipment of the embodiment of the present invention, as shown in figure 9, the embodiment of the present invention
UE includes transmission unit 90 and access unit 91, wherein
Transmission unit 90, the opportunity for sending upstream data or random access guiding for being notified in network side, by auxiliary
Serving cell sends random access guiding or upstream data to the network side；
Access unit 91 completes the access of the auxiliary serving cell after receiving the TA that network side is sent.
Above-mentioned network side element is primarily referred to as base station.
It is aforementioned that art technology should be appreciated that the realization function that unit is managed everywhere in user equipment shown in Fig. 9 can refer to
It accesses the associated description of the method and system of control and understands.Its function can realize by running on the program on processor,
Also it can be realized by specific logic circuit.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (18)
1. a kind of method of auxiliary serving cell access, which is characterized in that the method includes：
In random access procedure based on conflict, user equipment (UE) is before the transmission upstream data or random access that network side notifies
The opportunity led sends upstream data or random access guiding by auxiliary serving cell to the network side；
After the UE receives the time adjustment TA of network side feedback, the access of the auxiliary serving cell is completed；
The UE receives the logical of the opportunity to the transmission upstream data or random access guiding that the network side is sent together
Know and to the activation command of the auxiliary serving cell.
2. according to the method described in claim 1, it is characterized in that,
The TA is fed back after the network side is calculated according to the UE random access guidings sent or the upstream data.
3. according to the method described in claim 1, it is characterized in that, the opportunity for sending upstream data or random access guiding
For the network side is that the earliest random access guiding or upstream data that the UE is determined sends opportunity.
4. according to the method in any one of claims 1 to 3, which is characterized in that the transmission upstream data connects at random
It is the opportunity condition for meeting the transmission upstream data or random access guiding in present frame or next frame to enter leading opportunity
Subframe.
5. according to the method described in claim 1, it is characterized in that, the method further includes：
UE determines that auxiliary serving cell need to use different TA from main serving cell；
Alternatively, the UE receives the auxiliary serving cell that the network side is sent need to use leading to for different TA from main serving cell
Know.
6. according to the method described in claim 1, it is characterized in that, the method further includes：
The UE notifies the network side to need to activate the auxiliary serving cell or need to obtain described auxiliary by main serving cell
The TA of serving cell.
7. the method according to any one of claims 1 to 3,5 to 6, which is characterized in that the network side is base station.
8. a kind of method of auxiliary serving cell access, which is characterized in that the method includes：
In random access procedure based on conflict, network side notifies UE to send the opportunity of upstream data or random access guiding；
After the network side receives the upstream data or random access guiding that the UE is sent by auxiliary serving cell, TA is calculated simultaneously
The UE is fed back to, makes the UE access to the auxiliary serving cell；
The network side is by the opportunity and activation to the auxiliary serving cell of the transmission upstream data or random access guiding
Command combination sends jointly to the UE.
9. according to the method described in claim 8, it is characterized in that, the opportunity for sending upstream data or random access guiding
For the network side is that the earliest random access guiding or upstream data that the UE is determined sends opportunity.
10. method according to claim 8 or claim 9, which is characterized in that the method further includes：
The network side notifies auxiliary serving cell described in the UE that need to use different TA from main serving cell.
11. a kind of system of auxiliary serving cell access, including UE and network side, which is characterized in that
Network side is used in the random access procedure based on conflict, according to the random access guiding or upstream data meter received
TA is calculated, and is sent to the UE；And the UE is notified to send the opportunity of upstream data or random access guiding；
UE, in the random access procedure based on conflict, leading on the opportunity of the transmission upstream data or random access guiding
It crosses auxiliary serving cell and sends random access guiding or upstream data to the network side；And after receiving the TA, institute is completed
State the access of auxiliary serving cell；
The network side is further used for, by the opportunity for sending upstream data or random access guiding and to the auxiliary service
The activation command merging of cell sends jointly to the UE.
12. system according to claim 11, which is characterized in that it is described send upstream data or random access guiding when
Machine is that the network side is that the earliest random access guiding or upstream data that the UE is determined sends opportunity.
13. system according to claim 11 or 12, which is characterized in that the transmission upstream data or random access guiding
Opportunity be the opportunity condition for meeting the transmission upstream data or random access guiding in present frame or next frame subframe.
14. system according to claim 11, which is characterized in that
The UE is further used for, and determines that auxiliary serving cell need to use different TA from main serving cell；
Alternatively, the network side is further used for, notify the UE auxiliary serving cells that need to use different TA from main serving cell.
15. system according to claim 11, which is characterized in that the UE is further used for,
The network side is notified to need to activate the auxiliary serving cell or need to obtain the auxiliary service small by main serving cell
The TA in area.
16. a kind of network side element, which is characterized in that including determination unit, receiving unit, computing unit and transmission unit；Its
In,
Determination unit, in the random access procedure based on conflict, being determined for UE and sending upstream data or random access guiding
Opportunity；
Receiving unit, in the random access procedure based on conflict, the random access that UE is sent to be received by auxiliary serving cell
Leading or upstream data；
Computing unit, in the random access procedure based on conflict, calculating TA；
Transmission unit, in the random access procedure based on conflict, the TA to be sent to the UE；And it is sent out to the UE
Send the opportunity of the transmission upstream data or random access guiding；
The transmission unit, be additionally operable to by it is described transmission upstream data or random access guiding opportunity and to it is described it is auxiliary service it is small
The activation command merging in area sends jointly to the UE.
17. network side element according to claim 16, which is characterized in that the determination unit is further used for, for institute
The earliest random access guiding or upstream data for stating UE determinations sends opportunity；Wherein, it the transmission upstream data or connects at random
It is the opportunity condition for meeting the transmission upstream data or random access guiding in present frame or next frame to enter leading opportunity
Subframe.
18. a kind of user equipment, which is characterized in that including transmission unit and access unit, wherein
Transmission unit, in the random access procedure based on conflict, network side notice transmission upstream data or connect at random
Enter leading opportunity, random access guiding or upstream data are sent to the network side by auxiliary serving cell；
Access unit, in the random access procedure based on conflict, after the TA for receiving network side transmission, completing the auxiliary clothes
The access for cell of being engaged in；
The access unit is additionally operable to receive before the network side sends together to the transmission upstream data or random access
The notice on the opportunity led and activation command to the auxiliary serving cell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110218431.1A CN102917469B (en) | 2011-08-01 | 2011-08-01 | The method and system of auxiliary serving cell access, network side element, user equipment |
| PCT/CN2012/077260 WO2013016985A1 (en) | 2011-08-01 | 2012-06-20 | Method and system for accessing auxiliary service cell, network-side network element, and user equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110218431.1A CN102917469B (en) | 2011-08-01 | 2011-08-01 | The method and system of auxiliary serving cell access, network side element, user equipment |
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| Publication Number | Publication Date |
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| CN102917469A CN102917469A (en) | 2013-02-06 |
| CN102917469B true CN102917469B (en) | 2018-08-28 |
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| ES2823229T3 (en) | 2014-05-09 | 2021-05-06 | Huawei Tech Co Ltd | User equipment, base station, base station access procedure and radio link supervision procedure |
| CN108206725B (en) * | 2016-12-16 | 2022-05-10 | 中兴通讯股份有限公司 | Data transmission method, transmitter, receiver and storage medium |
| CN108882259B (en) * | 2017-05-16 | 2020-10-27 | 维沃移动通信有限公司 | Random access method, terminal, source base station and target base station |
| WO2020164141A1 (en) * | 2019-02-15 | 2020-08-20 | 富士通株式会社 | Method and apparatus for sending and receiving random access response, and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118801A (en) * | 2011-03-31 | 2011-07-06 | 电信科学技术研究院 | Method and device for unlink transmission in multicarrier aggregation system |
| CN102123516A (en) * | 2011-03-31 | 2011-07-13 | 电信科学技术研究院 | Random access method and equipment based on multiple uplink timing advances |
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| EP2502456B1 (en) * | 2009-11-19 | 2020-08-12 | InterDigital Patent Holdings, Inc. | Component carrier activation/deactivation in multi-carrier systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118801A (en) * | 2011-03-31 | 2011-07-06 | 电信科学技术研究院 | Method and device for unlink transmission in multicarrier aggregation system |
| CN102123516A (en) * | 2011-03-31 | 2011-07-13 | 电信科学技术研究院 | Random access method and equipment based on multiple uplink timing advances |
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| WO2013016985A1 (en) | 2013-02-07 |
| CN102917469A (en) | 2013-02-06 |
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