CN102892192B - Initial access method, apparatus and system under a kind of many timing groups - Google Patents
Initial access method, apparatus and system under a kind of many timing groups Download PDFInfo
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Abstract
Initial access method, apparatus and system under being organized the invention discloses a kind of many timings, for realizing in multicarrier system, the problem of the uplink synchronous of multiple up timing groups between base station and user terminal.The present invention sends each timing group and the mapping relations of up-link carrier by system information to user terminal, after addition and activation are not belonging to the secondary cell of same timing group with main plot, the accidental access response that correlation is regularly organized belonging to the secondary cell newly activated is sent on the descending carrier of the secondary cell on the descending carrier of main plot or newly activated, user terminal obtains the timing advance order of timing group from accidental access response, carries out the uplink synchronous of secondary cell.By the present invention can realize the uplink synchronous of multiple timing groups, it is to avoid because it is up it is asynchronous bring base station end data receive interference the problem of.
Description
Technical field
The present invention relates to moving communicating field, more particularly to a kind of Long Term Evolution (Long Term Evolution, LTE)
Initial access method, apparatus and system in GSM under multiple timing groups.
Background technology
Development with Mobile Communication Industry and the continuous growth to mobile data services demand, people are to mobile logical
The speed of letter and the requirement more and more higher of Qos, then in 3G (Third Generation) Moblie 3G also without extensive commercialization
Before, the research-and-development activity to next generation mobile communication system is just had begun to, wherein comparing typically third generation conjunction
Make Partnership Program 3GPP startup Long Term Evolution LTE projects, the available a width of 20MHz of maximum spectrum band of LTE system (megahertz
Hereby).With the further evolution of network, LTE-A can provide up to 100MHz spectral bandwidth as LTE evolution system,
More flexible higher-quality communication is supported, while LTE system possesses good backwards compatibility.Have in lte-a system multiple
Component carrier (CC, component carrier), a LTE terminal can only operate on the CC of some backward compatibility, and energy
The stronger LTE-A terminals of power can be transmitted on multiple CC simultaneously.
Mainly have following several the reason for user terminal (User Equipment, UE) Stochastic accessing in LTE system：
The first, user terminal also referred to as initially connects from idle (RRC_IDLE) the state access system of wireless heterogeneous networks
Enter (Initial Access)；
Second, user terminal initiates Stochastic accessing after Radio Link Failure, and it is also the one kind being initially accessed；
The third, user terminal needs Stochastic accessing in cell switch process；
4th kind, user terminal, which is in when wireless heterogeneous networks connect (RRC_CONNECTED) state, has downlink data to arrive
Reach；
5th kind, user terminal has upstream data arrival when being in RRC_CONNECTED states.
For the third and the 4th kind of situation, if dedicated preamble (preamble), then can use it is non-competing with
Machine is accessed, and the process of non-competing Stochastic accessing is as shown in figure 1, be broadly divided into following three step：
Step 1, message 0：Base station is that user terminal is distributed for the non-random access lead code mark for striving Stochastic accessing unexpectedly
The Physical Random Access Channel that (Random Access Preamble, ra-Preamble Index) and Stochastic accessing are used
(Physical Random Access Channel, PRACH) mask numbers (PRACH Mask Index, ra-PRACH-
Maskindex).For downlink data reach caused by non-competing Stochastic accessing, by Physical Downlink Control Channel (PDCCH,
Physical Downlink Control Channel) ra-Preambleindex and ra-PRACH-Maskindex be sent to
User terminal；Stochastic accessing is striven unexpectedly based on non-caused by switching, by ra-Preambleindex and ra-PRACH-Maskindex
Carrying is sent to user terminal in switching command (handover command).
Step 2, message 1：User terminal according to the ra-Preambleindex and ra-PRACH-Maskindex received,
The dedicated preamble specified in message 0 is sent to base station in the PRACH resources that ra-PRACH-Maskindex is specified
Preamble, base station is received after message 1 according to the calculating uplink timing advance of message 1 (TA, Timing Advance).
Step 3, message 2：Base station is sent in accidental access response, accidental access response comprising up TA letters to user terminal
Breath, notifies the Timing Advance of subsequent upstream transmission.
The process of Stochastic accessing is competed as shown in Fig. 2 being broadly divided into following four step：
Step 1, message 1：User terminal selecting Stochastic accessing preamble and PRACH resource simultaneously uses the PRACH resources
Selected Stochastic accessing preamble is sent to base station；
Step 2, message 2：Base station receives preamble, calculates up TA, and sends Stochastic accessing to user terminal and rings
Should, the up TA information and ULgrant (uplink scheduling information) information for message 3 are comprised at least in accidental access response；
Step 3, message 3：User terminal sends uplink, different random access on the UL grant that message 2 is specified
The content of the uplink of message 3 of reason is different, such as the Stochastic accessing reason being initially accessed, and that message 3 is transmitted is RRC
Request is set up in (Radio Resource Control, wireless heterogeneous networks) connection；
Step 4, message 4：Base station sends contention resolution message to user terminal, and user terminal may determine that according to message 4
Whether Stochastic accessing succeeds.
User terminal completes the foundation of uplink synchronous according to the up TA obtained in above-mentioned random access procedure.It is up same
Walk for keeping the upstream data between user terminal and base station synchronous, be easy to user terminal to carry out transmitting uplink data and under
Row data send hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat Req) feedback information.
, it is necessary to be safeguarded to uplink synchronous after uplink synchronous foundation.Provide up same by base station maintenance in LTE system
Step, base station and user terminal safeguard a upstream synchronous timing device (TA timer, TAT) respectively；Base station is according to user terminal
Uplink is recalculated after up TA, and the timing advance order (TA command) for including the up TA is sent to user terminal
And start TAT；If user terminal can not be properly received TA command, to base station send negative response (NACK,
Negative Acknowledgement) message, base station resends TA command after time T1 and restarts TAT；User
Terminal have correctly received TA command then start user terminal TAT and to base station send response (ACK,
Acknowledgement) message, TA of the user terminal in TA command carries out uplink；Base station receives user
The TAT of base station is restarted after the ACK message that terminal is sent.Base station performs a said process every the T2 times, and T2 is less than
TAT timing length.If base station is not timed-out for the TAT of some user terminal, it is same that base station thinks that the user terminal is in
Step state.If the TAT that user terminal oneself is safeguarded is not timed-out, user terminal thinks it oneself is synchronous.
The uplink synchronous of multiple timing advance groups in the multicarrier system for LTE-A there is no to set up and maintenance side at present
Formula, causes in multicarrier system, it is impossible to realize the uplink synchronous of multiple up timing groups between base station and user terminal.
The content of the invention
In view of this, it is a primary object of the present invention to provide the initial access method under a kind of many timings are organized, device and
System, for realizing in multicarrier system, the uplink synchronous of multiple up timing groups between base station and user terminal, so as to complete
Initial access process.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of initial access method under many timing groups, this method includes：
Each timing group and the mapping relations of up-link carrier are sent to user terminal by system information；
Being initially accessed for user terminal is realized on main plot.
Preferably, Physical Random Access Channel PRACH configuration informations, and each timing are included in the system information
Group and the mapping relations of up-link carrier.
Preferably, realized on main plot after being initially accessed of user terminal, methods described also includes：
Addition and activation are not belonging to the secondary cell of same timing group with main plot；
Issue timing belonging to the secondary cell that newly activates and organize related accidental access response, user terminal is from accidental access response
After the timing advance order of timing group belonging to middle acquisition secondary cell, uplink synchronous is carried out in secondary cell.
Preferably, reallocation message addition is connected by radio resource control RRC and is not belonging to same timing group with main plot
Secondary cell, user terminal obtains the PRACH configuration informations of the secondary cell of addition, wherein PRACH from RRC connection reallocation messages
Configuration information is comprising special Stochastic accessing configuration information or does not include；
Base station secondary cell is activated by medium access key-course control unit MAC CE.
Preferably, it is described issue timing belonging to the secondary cell that newly activates organize related accidental access response and user terminal from
The method of the timing advance order of timing group is belonging to acquisition secondary cell in the accidental access response：
If newly activation a pair of secondary cells up-downgoing carrier wave, and up-link carrier therein be not belonging to main plot it is same fixed
When group, then base station sent on the descending carrier of main plot is regularly organized belonging to the secondary cell newly activated correlation Stochastic accessing ring
Should, user terminal receives the Stochastic accessing sound that correlation is regularly organized belonging to the secondary cell newly activated on the descending carrier of main plot
Should, and therefrom obtain the timing advance order of timing group belonging to secondary cell.
Preferably, it is described issue timing belonging to the secondary cell that newly activates organize related accidental access response and user terminal from
The method of the timing advance order of timing group is belonging to acquisition secondary cell in the accidental access response：
If newly activation a pair of secondary cells up-downgoing carrier wave, and up-link carrier therein be not belonging to main plot it is same fixed
When group, then base station sent on the descending carrier of secondary cell is regularly organized belonging to the secondary cell newly activated correlation Stochastic accessing ring
Answer, user terminal receives on the descending carrier of the secondary cell newly activated and regularly organizes connecing at random for correlation belonging to new activation secondary cell
Enter response, and therefrom obtain the timing advance order of timing group belonging to secondary cell.
Preferably, it is described issue timing belonging to the secondary cell that newly activates organize related accidental access response and user terminal from
The method of the timing advance order of timing group is belonging to acquisition secondary cell in the accidental access response：
If newly activation a pair of secondary cells up-downgoing carrier wave, and up-link carrier therein be not belonging to main plot it is same fixed
When group, then base station sent on the descending carrier of main plot is regularly organized belonging to the secondary cell newly activated correlation Stochastic accessing ring
Should, user terminal receives the Stochastic accessing sound that correlation is regularly organized belonging to the secondary cell newly activated on the descending carrier of main plot
Should, indicated by the secondary cell in the accidental access response, know the timing advance order category in the accidental access response
In which timing group, and therefrom obtain the timing advance order of the timing group.
Based on the embodiment of the present invention, the present invention also proposes a kind of user terminal UE, and the user terminal includes：
Acquisition module, for obtaining the PRACH configuration informations of main plot and each timing from the system information that base station is issued
Group and the mapping relations of up-link carrier；And the PRACH configuration informations of secondary cell are obtained from RRC connection reconfiguration messages；
Main plot AM access module, for being initially accessed according to the system information of acquisition to main plot.
Preferably, the user terminal also includes secondary cell synchronization module,
The secondary cell synchronization module is used for the up-downgoing carrier wave in newly a pair of secondary cells of activation, and up-link carrier therein
When being not belonging to same timing group with main plot, timing group belonging to the secondary cell newly activated is received on the descending carrier of main plot
Related accidental access response, and the timing advance order of timing group belonging to secondary cell is therefrom obtained, then enter in the secondary cell
Row uplink synchronous；Or
For being not belonging to same timing in newly a pair of secondary cell up-downgoing carrier waves of activation and the up-link carrier and main plot
During group, the Stochastic accessing for regularly organizing correlation belonging to the new activation secondary cell of reception on the descending carrier of the secondary cell newly activated rings
Should, and the timing advance order of timing group belonging to secondary cell is therefrom obtained, then carry out uplink synchronous in the secondary cell；Or
For newly activation a pair of secondary cells up-downgoing carrier wave, and up-link carrier therein be not belonging to main plot it is same
During individual timing, the accidental access response that correlation is regularly organized belonging to the secondary cell newly activated is received on the descending carrier of main plot,
Indicated by the secondary cell in the accidental access response, know which the timing advance order in the accidental access response belongs to
Individual timing group, and the timing advance order of the timing group is therefrom obtained, uplink synchronous is carried out in corresponding secondary cell.
Based on the embodiment of the present invention, the present invention also proposes a kind of base station, and the base station includes：
Module is issued, for sending in system information, the system information PRACH configuration informations comprising main plot and each
Timing group and the mapping relations of up-link carrier；
Processing module is accessed in main plot, and the main plot access request for responding user terminal realizes user terminal in master
Cell is initially accessed.
Preferably, the base station also includes：
Active module is added, for adding and activating secondary cell；
Accidental access response module, it is described auxiliary for the accidental access response for the secondary cell for sending main plot and newly activating
The timing advance order of timing group belonging to secondary cell is included in the accidental access response of cell.
Preferably, the accidental access response module is sent on the descending carrier of main plot belonging to the secondary cell newly activated
Timing is organized to be included in related accidental access response, the accidental access response：The timing of timing group belonging to new activation secondary cell
Advance command, uplink authorization and Temporary Cell Radio Network temporary mark；Or included in the accidental access response：Secondary cell refers to
Show, timing advance order, uplink authorization and Temporary Cell Radio Network temporary mark；Or the accidental access response module is new
Related accidental access response is organized in timing belonging to new activation secondary cell is sent on the descending carrier of the secondary cell of activation, described random
Included in access response：Timing advance order, uplink authorization and the Temporary Cell wireless network of timing group belonging to new activation secondary cell
Network temporary mark.
The present invention sends each timing group and the mapping relations of up-link carrier by system information to user terminal, in addition and
Activation is not belonging to after the secondary cell of same timing group with main plot, the secondary cell on the descending carrier of main plot or newly activated
Descending carrier on send timing belonging to the secondary cell that newly activates and organize related accidental access response, user terminal is from Stochastic accessing
The timing advance order of timing group is obtained in response, the uplink synchronous of secondary cell is carried out.It is multiple fixed to be realized by the present invention
When group uplink synchronous, it is to avoid because it is up it is asynchronous bring base station end data receive interference the problem of.
Brief description of the drawings
Fig. 1 is the flow chart of non-competing access in the prior art；
Fig. 2 is the flow chart of contention access in the prior art；
Fig. 3 is the main process figure of the initial access method under many timings provided in an embodiment of the present invention are organized；
The timing group schematic diagram of a scenario of Fig. 4 embodiment of the present invention one and embodiment three；
The timing group schematic diagram of a scenario of Fig. 5 embodiment of the present invention two；
Fig. 6 is the structural representation of the accidental access response used in the embodiment of the present invention three；
Fig. 7 is a kind of user terminal provided in an embodiment of the present invention；
Fig. 8 is a kind of base station provided in an embodiment of the present invention.
Embodiment
It is by the following examples and referring to the drawings, right for the object, technical solutions and advantages of the present invention are more clearly understood
The present invention is further described.
The main process figure of initial access method under many timing groups that Fig. 3 provides for the present invention, this method includes as follows
Step：
Step 301, each timing group and the mapping relations of up-link carrier to user terminal sent by system information；
In the system information include Physical Random Access Channel PRACH configuration informations, and each timing group with it is upper
The mapping relations of row carrier wave；
Step 302, user terminal realize being initially accessed for user terminal on main plot.
Step 303, addition and activation are not belonging to the secondary cell of same timing group with main plot；
It is same fixed that the embodiment of the present invention is not belonging to by radio resource control RRC connection reallocation message addition with main plot
When group secondary cell, user terminal obtains the PRACH configuration informations of the secondary cell of addition from RRC connection reallocation messages, wherein
PRACH configuration informations are comprising special Stochastic accessing configuration information or do not include；
Base station by medium access key-course control unit (Media Access Control-Control Element,
MAC CE) activate the secondary cell newly added；
After step 304, activation secondary cell, user terminal initiates Stochastic accessing on the up-link carrier of secondary cell, if not having
Collide, then base station issues timing belonging to the secondary cell that newly activates and organizes related accidental access response, user terminal from
Obtained in machine access response after the timing advance order of timing group belonging to secondary cell, uplink synchronous is carried out in secondary cell.
Base station issue timing belonging to the secondary cell that newly activates organize related accidental access response and user terminal from it is described with
The timing advance order of timing group belonging to secondary cell is obtained in machine access response following three kinds of methods：
If the up-downgoing carrier wave of method one, newly a pair of secondary cells of activation, and up-link carrier therein is not belonging to main plot
Same timing group, then base station is sent on the descending carrier of main plot regularly organizes the random of correlation belonging to the secondary cell newly activated
Access response, user terminal is received on the descending carrier of main plot regularly organizes connecing at random for correlation belonging to the secondary cell newly activated
Enter response, and therefrom obtain the timing advance order of timing group belonging to secondary cell.
If the up-downgoing carrier wave of method two, newly a pair of secondary cells of activation, and up-link carrier therein is not belonging to main plot
Same timing group, then base station is sent on the descending carrier of secondary cell regularly organizes the random of correlation belonging to the secondary cell newly activated
Response is accessed, user terminal receives on the descending carrier of the secondary cell newly activated and regularly organizes correlation belonging to new activation secondary cell
Accidental access response, and therefrom obtain the timing advance order of timing group belonging to secondary cell.
If the up-downgoing carrier wave of method three, newly a pair of secondary cells of activation, and up-link carrier therein is not belonging to main plot
Same timing group, then base station is sent on the descending carrier of main plot regularly organizes the random of correlation belonging to the secondary cell newly activated
Access response, user terminal is received on the descending carrier of main plot regularly organizes connecing at random for correlation belonging to the secondary cell newly activated
Enter response, indicated by the secondary cell in the accidental access response, know the timing advance life in the accidental access response
Which timing group order belongs to, and therefrom obtains the timing advance order of the timing group.
Embodiment one
Fig. 4 is in lte-a system, the scene of two carrier aggregations, wherein up-link carrier 1 and descending carrier 1 is main plot
Cell carrier supplemented by carrier wave, up-link carrier 2 and descending carrier 2, up-link carrier 1 and up-link carrier 2 are belonging respectively to timing group 1 and fixed
When group 2, and up-link carrier 1 and descending carrier 1 are that system information block 2 is SIB2 connections, and up-link carrier 2 and descending carrier 2 are
SIB2 connections.By the relevant parameter in by obtaining SIB2 message in descending carrier 1 on up-link carrier 1, such as band in the present invention
Width, frequency etc., referred to as up-link carrier 1 and descending carrier 1 are SIB2 connections, similarly, by obtaining SIB2 message in descending carrier 2
In relevant parameter on up-link carrier 2, up-link carrier 2 and descending carrier 2 are also SIB2 connections.
The embodiment makes user terminal acquiescence know that the timing advance order received at this stage is by implicit mode
Belong to the timing advance group that newly activates, comprise the following steps that：
Step 1, user terminal carry out cell search process, and according to 3GPP Rel-10 specification, select descending carrier 1
Carry out the reception of down-going synchronous and system information；User terminal needs what is included in correct detecting system information, system information
Physical Random Access Channel PRACH configuration informations, in addition to：The base station control under all timing groups map information, i.e., on
Row carrier wave 1 belongs to timing group 1, and up-link carrier 2 belongs to timing group 2；
Step 2, user terminal are according to the PRACH configuration informations of main plot, and random selection PRACH resources are in up-link carrier 1
Upper to send, wherein PRACH resources include the time-frequency location of lead code and up transmission；
Step 3, user terminal complete random access procedure according to 3GPP Rel-10 specification, complete on up-link carrier 1
Into the uplink synchronous with base station, and set up wireless heterogeneous networks (Radio Resource Control, RRC) connection；
Step 4, base station are by RRC connection reconstitution process, and new addition up-link carrier 2 and descending carrier 2 are used as pairing, its
In, it is sent in base station in the RRC of user terminal connection reallocation messages in addition to comprising content as defined in 3GPPRel-10, also
Include the PRACH configuration informations of up-link carrier 2 in timing group 2, wherein PRACH configuration informations are configured comprising special Stochastic accessing
Information does not include；
Step 5, according to demand, base station passes through medium access key-course control unit (Media according to Rel-10 regulation
Access Control-Control Element, MAC CE) activate secondary cell, i.e. up-link carrier 2 and descending carrier 2；
Step 6, user terminal are according to the PRACH configuration informations of secondary cell, and random selection PRACH resources are in up-link carrier 2
Upper to send, wherein PRACH resources include the time-frequency location of lead code and up transmission；
Step 7, base station receive user terminal send come up it is leading after, if it find that not with other users terminal rush
It is prominent, then send in the accidental access response of timing group 2, accidental access response and mainly wrapped to the user terminal on descending carrier 1
Include timing advance order, uplink authorization and the Temporary Cell Radio Network temporary mark of timing group 2, the form of accidental access response
It is consistent with 3GPP Rel-10 with content；
If base station finds the situation for having conflict, solved according to the method for contention resolved as defined in 3GPP Rel-10.
Step 8, user terminal are received after the accidental access response sent on descending carrier 1, give tacit consent to this Stochastic accessing sound
The content answered is that correlation is organized in timing belonging to the secondary cell newly activated, and user terminal obtains timing group 2 from accidental access response
Timing advance order after, carry out uplink synchronous.
Embodiment two：
Fig. 5 is in lte-a system, the scene of two carrier aggregations, wherein up-link carrier 1 and descending carrier 1 is main plot
Cell carrier supplemented by carrier wave, up-link carrier 2 and descending carrier 2, up-link carrier 1 and up-link carrier 2 are belonging respectively to timing group 1 and fixed
When group 2, and up-link carrier 1 and descending carrier 1 are SIB2 connections, and up-link carrier 2 and descending carrier 2 are SIB2 connections, specifically
Step is as follows：
Step 1, user terminal carry out cell search process, and according to 3GPP Rel-10 specification, select descending carrier 1
Carry out the reception of down-going synchronous and system information；PRACH configuration informations are included in the correct detecting system information of user terminal, also
Including：The information of all timing groups under the control of the base station, i.e. up-link carrier 1 belong to timing group 1, and up-link carrier 2 belongs to timing
Group 2；
Step 2, user terminal are according to the PRACH configuration informations of main plot, and random selection PRACH resources are in up-link carrier 1
Upper to send, wherein PRACH resources include the time-frequency location of lead code and up transmission；
Step 3, user terminal complete random access procedure according to 3GPP Rel-10 specification, complete on up-link carrier 1
Into the uplink synchronous with base station, and set up RRC connections；
Step 4, base station are by RRC connection reconstitution process, new addition up-link carrier 2 and descending carrier 2, wherein RRC connections
In reallocation message in addition to comprising content as defined in 3GPP Rel-10, include the PRACH of the up-link carrier 2 in timing group 2
Configuration information, wherein PRACH configuration informations are comprising special Stochastic accessing configuration information or do not include；
Step 5, according to demand, base station activates secondary cell according to 3GPP Rel-10 regulation by MAC CE, i.e., up
Carrier wave 2 and descending carrier 2；
Step 6, user terminal are according to the PRACH configuration informations of secondary cell, and random selection PRACH resources are in up-link carrier 2
Upper to send, wherein PRACH resources include the time-frequency location of lead code and up transmission；
Base station receive user terminal send come up it is leading after, if it find that do not conflict with other users terminal, this
Shi Jizhan then sends the accidental access response of timing group 2, the form of accidental access response on descending carrier 2 to the user terminal
It is consistent with 3GPP Rel-10 with content；
Step 7, base station receive user terminal send come up it is leading after, if it find that not with other users terminal rush
It is prominent, then the accidental access response of timing group 2 is sent to the user terminal on descending carrier 2, wherein mainly including timing group 2
Timing advance order, uplink authorization and Temporary Cell Radio Network temporary mark, the format and content of accidental access response with
3GPP Rel-10 are consistent；
If base station finds the situation for having conflict, solved according to the method for contention resolved as defined in 3GPP Rel-10.
Step 9, user terminal are obtained after the timing advance order of timing group 2, carry out uplink synchronous.
Embodiment three：
The scene of two carrier aggregations of lte-a system based on Fig. 4, wherein up-link carrier 1 and descending carrier 1 are main plot
Cell carrier supplemented by carrier wave, up-link carrier 2 and descending carrier 2, up-link carrier 1 and up-link carrier 2 are belonging respectively to timing group 1 and fixed
When group 2, and up-link carrier 1 and descending carrier 1 are SIB2 connections, and up-link carrier 2 and descending carrier 2 are SIB2 connections.The reality
Apply example in an explicit way, user terminal is clearly told by MACCE, which timing advance group the timing advance order is.
Comprise the following steps that：
Step 1, user terminal carry out cell search process, and according to 3GPP Rel-10 specification, select descending carrier 1
Carry out the reception of down-going synchronous and system information；The PRACH configuration informations included in the correct detecting system information of user terminal,
Also include：The information of all timing groups under the control of the base station, i.e. up-link carrier 1 belong to timing group 1, and up-link carrier 2 belongs to fixed
When group 2；
Step 2, user terminal are according to the PRACH configuration informations of main plot, and random selection PRACH resources are in up-link carrier 1
Upper to send, wherein PRACH resources include the time-frequency location of lead code and up transmission；
Step 3, user terminal complete random access procedure according to 3GPP Rel-10 specification, complete on up-link carrier 1
Into the uplink synchronous with base station, and set up RRC connections；
Step 4, base station are by RRC connection reconstitution process, new addition up-link carrier 2 and descending carrier 2, wherein RRC connections
The PRACH of up-link carrier 2 matches somebody with somebody in reallocation message in addition to comprising content as defined in 3GPP Rel-10, in addition in timing group 2
Confidence ceases, and wherein PRACH configuration informations are comprising special Stochastic accessing configuration information or do not include；
Step 5, according to demand, base station activates secondary cell according to 3GPP Rel-10 regulation by MAC CE, i.e., up
Carrier wave 2 and descending carrier 2；
Step 6, user terminal are according to the PRACH configuration informations of secondary cell, and random selection PRACH resources are in up-link carrier 2
Upper to send, wherein PRACH resources include the time-frequency location of lead code and up transmission
Step 7, base station receive user terminal send come up it is leading after, if it find that not with other users terminal rush
It is prominent, then the accidental access response of timing group 2 is sent to the user terminal on descending carrier 1, i.e. MAC RAR, its structure is shown in figure
6, marked temporarily including reservation bit, secondary cell instruction, timing advance order, uplink authorization and Temporary Cell Radio Network
Know, unlike the prior art, this embodiment increases secondary cell instruction, for telling determining in user terminal MAC RAR
When advance command be which secondary cell belonged to；
If base station finds the situation for having conflict, solved according to the method for contention resolved as defined in 3GPP Rel-10.
Step 9, user terminal detection medium access key-course accidental access response (MAC RAR), and pass through Stochastic accessing
Secondary cell in response is indicated, knows that the timing advance order in MAC RAR belongs to timing group 2, user terminal will use this timing
Advance command carries out uplink synchronous.
Example IV
A kind of user terminal that Fig. 7 is provided for the present invention based on above-mentioned Application Example, the user terminal 700 includes：
Acquisition module 701, PRACH configuration informations and Ge Ding for obtaining main plot from the system information that base station is issued
The mapping relations of Shi Zuyu up-link carriers；And the PRACH configuration informations of secondary cell are obtained from RRC connection reconfiguration messages；
Main plot AM access module 702, for being initially accessed according to the system information of acquisition to main plot.
Further, the user terminal also includes secondary cell synchronization module 703, is initially connect for being realized on main plot
After entering, uplink synchronous is carried out in secondary cell, based on previous embodiment, by three kinds of modes user terminal can be realized in secondary cell
Synchronous, these three modes correspond to the synchronous mould of the first secondary cell synchronization module, the second secondary cell synchronization module, the 3rd secondary cell respectively
Block；
First secondary cell synchronization module, newly activation a pair of secondary cells up-downgoing carrier wave, and up-link carrier therein with
When main plot is not belonging to same timing group, is received on the descending carrier of main plot and regularly organize phase belonging to the secondary cell newly activated
The accidental access response of pass, and the timing advance order of timing group belonging to secondary cell is therefrom obtained, then carried out in the secondary cell
Uplink synchronous；
Second secondary cell synchronization module, for small in newly a pair of secondary cell up-downgoing carrier waves of activation and the up-link carrier and master
When area is not belonging to same timing group, timing group belonging to new activation secondary cell is received on the descending carrier of the secondary cell newly activated
Related accidental access response, and the timing advance order of timing group belonging to secondary cell is therefrom obtained, then enter in the secondary cell
Row uplink synchronous；
3rd secondary cell synchronization module, for newly activating the up-downgoing carrier wave of a pair of secondary cells, and up load therein
When ripple is not belonging to same timing with main plot, timing group belonging to the secondary cell newly activated is received on the descending carrier of main plot
Related accidental access response, is indicated by the secondary cell in the accidental access response, known in the accidental access response
Timing advance order which timing group belonged to, and the timing advance order of the timing group is therefrom obtained, in corresponding secondary cell
Upper carry out uplink synchronous.
Embodiment five
A kind of base station that Fig. 8 is provided for the present invention based on above-mentioned Application Example, the base station 800 includes：
Module 801 is issued, main plot is included in system information, the system information for being sent to user terminal
PRACH configuration informations and each timing group and the mapping relations of up-link carrier；
Processing module 802 is accessed in main plot, and the main plot access request for responding user terminal completes user terminal and existed
Main plot is initially accessed.
Active module 803 is added, for adding and activating secondary cell；
Accidental access response module 804, it is described for the accidental access response for the secondary cell for sending main plot and newly activating
The timing advance order of timing group belonging to secondary cell is included in the accidental access response of the secondary cell newly activated.
The accidental access response module 804 sends timing belonging to the secondary cell newly activated on the descending carrier of main plot
Included in the related accidental access response of group, the accidental access response：The timing advance of timing group belonging to new activation secondary cell
Order, uplink authorization and Temporary Cell Radio Network temporary mark；Or included in the accidental access response：Secondary cell instruction,
Timing advance order, uplink authorization and Temporary Cell Radio Network temporary mark；Or the accidental access response module swashs newly
Related accidental access response is organized in timing belonging to new activation secondary cell is sent on the descending carrier of secondary cell living, described to connect at random
Enter and included in response：Timing advance order, uplink authorization and the Temporary Cell Radio Network of timing group belonging to new activation secondary cell
Temporary mark.
Based on above-described embodiment four and embodiment five, the present invention also provides and is initially accessed system under a kind of many timings are organized,
The system contains the base station that the user terminal that example IV provided and embodiment five are provided.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also use one or more integrated circuits to realize.Accordingly
Each module/unit in ground, above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all
Any modifications, equivalent substitutions and improvements made within the spirit and principles in the present invention etc., should be included in the protection of the present invention
Within the scope of.
Claims (11)
1. the initial access method under a kind of many timing groups, it is characterised in that this method includes：
Each timing group and the mapping relations of up-link carrier are sent to user terminal by system information；
Being initially accessed for user terminal is realized on main plot；
Addition and activation are not belonging to the secondary cell of same timing group with main plot；
Issue timing belonging to the secondary cell newly activated and organize related accidental access response, user terminal is obtained from accidental access response
Take after the timing advance order of timing group belonging to secondary cell, uplink synchronous is carried out in secondary cell.
2. according to the method described in claim 1, it is characterised in that Physical Random Access Channel is included in the system information
PRACH configuration informations, and each timing group and the mapping relations of up-link carrier.
3. according to the method described in claim 1, it is characterised in that
The secondary cell that reallocation message addition is not belonging to same timing group with main plot is connected by radio resource control RRC, used
Family terminal obtains the PRACH configuration informations of the secondary cell of addition, wherein PRACH configuration informations bag from RRC connection reallocation messages
Containing special Stochastic accessing configuration information or do not include；
Base station secondary cell is activated by medium access key-course control unit MAC CE.
4. according to the method described in claim 1, it is characterised in that described to issue timing group correlation belonging to the secondary cell newly activated
Accidental access response and user terminal obtained from the accidental access response regularly organized belonging to secondary cell timing advance life
The method of order is：
If the newly up-downgoing carrier wave of a pair of secondary cells of activation, and up-link carrier therein is not belonging to same timing with main plot
Group, then base station is sent on the descending carrier of main plot regularly organizes related accidental access response belonging to the secondary cell newly activated,
User terminal receives the accidental access response that correlation is regularly organized belonging to the secondary cell newly activated on the descending carrier of main plot, and
Therefrom obtain the timing advance order of timing group belonging to secondary cell.
5. according to the method described in claim 1, it is characterised in that described to issue timing group correlation belonging to the secondary cell newly activated
Accidental access response and user terminal obtained from the accidental access response regularly organized belonging to secondary cell timing advance life
The method of order is：
If the newly up-downgoing carrier wave of a pair of secondary cells of activation, and up-link carrier therein is not belonging to same timing with main plot
Group, then base station is sent on the descending carrier of secondary cell regularly organizes related accidental access response belonging to the secondary cell newly activated,
User terminal receives the Stochastic accessing that correlation is regularly organized belonging to new activation secondary cell on the descending carrier of the secondary cell newly activated
Response, and therefrom obtain the timing advance order of timing group belonging to secondary cell.
6. according to the method described in claim 1, it is characterised in that described to issue timing group correlation belonging to the secondary cell newly activated
Accidental access response and user terminal obtained from the accidental access response regularly organized belonging to secondary cell timing advance life
The method of order is：
If the newly up-downgoing carrier wave of a pair of secondary cells of activation, and up-link carrier therein is not belonging to same timing with main plot
Group, then base station is sent on the descending carrier of main plot regularly organizes related accidental access response belonging to the secondary cell newly activated,
User terminal receives the accidental access response that correlation is regularly organized belonging to the secondary cell newly activated on the descending carrier of main plot, leads to
The secondary cell crossed in the accidental access response is indicated, knows which the timing advance order in the accidental access response belongs to
Timing group, and therefrom obtain the timing advance order of the timing group.
7. a kind of user terminal UE, it is characterised in that the user terminal includes：
Acquisition module, for from the system information that base station is issued obtain main plot PRACH configuration informations and each timing group with
The mapping relations of up-link carrier；And the PRACH configuration informations of secondary cell are obtained from RRC connection reconfiguration messages；
Main plot AM access module, for being initially accessed according to the system information of acquisition to main plot；
Secondary cell synchronization module, after realization is initially accessed on main plot, uplink synchronous is carried out in secondary cell.
8. user terminal according to claim 7, it is characterised in that
The secondary cell synchronization module, specifically for newly activating the up-downgoing carrier wave of a pair of secondary cells, and up load therein
When ripple is not belonging to same timing group with main plot, timing belonging to the secondary cell newly activated is received on the descending carrier of main plot
The related accidental access response of group, and the timing advance order of timing group belonging to secondary cell is therefrom obtained, then in the secondary cell
Carry out uplink synchronous；Or
Specifically for being not belonging to same timing in newly a pair of secondary cell up-downgoing carrier waves of activation and the up-link carrier and main plot
During group, the Stochastic accessing for regularly organizing correlation belonging to the new activation secondary cell of reception on the descending carrier of the secondary cell newly activated rings
Should, and the timing advance order of timing group belonging to secondary cell is therefrom obtained, then carry out uplink synchronous in the secondary cell；Or
Specifically for newly activation a pair of secondary cells up-downgoing carrier wave, and up-link carrier therein be not belonging to main plot it is same
During individual timing, the accidental access response that correlation is regularly organized belonging to the secondary cell newly activated is received on the descending carrier of main plot,
Indicated by the secondary cell in the accidental access response, know which the timing advance order in the accidental access response belongs to
Individual timing group, and the timing advance order of the timing group is therefrom obtained, uplink synchronous is carried out in corresponding secondary cell.
9. a kind of base station, it is characterised in that the base station includes：
Module is issued, for sending the PRACH configuration informations comprising main plot and each timing in system information, the system information
Group and the mapping relations of up-link carrier；
Processing module is accessed in main plot, and the main plot access request for responding user terminal realizes user terminal in main plot
Be initially accessed；
Active module is added, for adding and activating secondary cell；
Accidental access response module, for the accidental access response for the secondary cell for sending main plot and newly activating, the secondary cell
Accidental access response in include the timing advance order of timing group belonging to secondary cell.
10. base station according to claim 9, it is characterised in that
The accidental access response module is sent on the descending carrier of main plot regularly organizes correlation belonging to the secondary cell newly activated
Accidental access response, include in the accidental access response：The timing advance order of timing group belonging to new activation secondary cell, on
Row is authorized and Temporary Cell Radio Network temporary mark；Or included in the accidental access response：Secondary cell is indicated, timing advance
Order, uplink authorization and Temporary Cell Radio Network temporary mark；Or
The accidental access response module sends timing belonging to new activation secondary cell on the descending carrier of the secondary cell newly activated
Included in the related accidental access response of group, the accidental access response：The timing advance of timing group belonging to new activation secondary cell
Order, uplink authorization and Temporary Cell Radio Network temporary mark.
11. a kind of many timings are organized and lower are initially accessed system, it is characterised in that including the user terminal described in claim 7 with
Base station described in claim 9.
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| CN201110203972.7A CN102892192B (en) | 2011-07-20 | 2011-07-20 | Initial access method, apparatus and system under a kind of many timing groups |
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| CN201110203972.7A CN102892192B (en) | 2011-07-20 | 2011-07-20 | Initial access method, apparatus and system under a kind of many timing groups |
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| WO2015141637A1 (en) * | 2014-03-19 | 2015-09-24 | シャープ株式会社 | Terminal device, base station device, communication system, communication method, and integrated circuit |
| CN106160973B (en) * | 2015-04-07 | 2019-04-19 | 上海诺基亚贝尔股份有限公司 | The method and device that data for controlling supplementary cell are transmitted |
| CN106817776B (en) * | 2015-12-02 | 2020-04-07 | 展讯通信（上海）有限公司 | Random access method for base station and user equipment |
| SG11201811641VA (en) * | 2016-06-30 | 2019-01-30 | Beijing Xiaomi Mobile Software Co Ltd | Method and apparatus for transmitting system information |
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| CN108112033B (en) * | 2016-11-25 | 2022-07-08 | 中兴通讯股份有限公司 | Method and device for switching primary carrier and secondary carrier |
| JP7039610B2 (en) * | 2017-03-20 | 2022-03-22 | オッポ広東移動通信有限公司 | How to transmit system information, base stations and terminals |
| JP6951458B2 (en) * | 2017-03-20 | 2021-10-20 | オッポ広東移動通信有限公司Ｇｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． | How to transmit system information, base stations and terminals |
| CN108632986B (en) * | 2017-03-24 | 2020-08-14 | 华为技术有限公司 | Synchronization method and device |
| CN109802817B (en) * | 2017-11-17 | 2023-06-16 | 华为技术有限公司 | Information sending and receiving method and device |
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