CN102271418B

CN102271418B - A kind of method of Stochastic accessing and device

Info

Publication number: CN102271418B
Application number: CN201110214191.8A
Authority: CN
Inventors: 高雪娟; 林亚男; 许芳丽; 沈祖康
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-07-28
Filing date: 2011-07-28
Publication date: 2016-04-20
Anticipated expiration: 2031-07-28
Also published as: CN102271418A

Abstract

The invention discloses a kind of method of Stochastic accessing, for realizing random access procedure, not increasing UE on the basis of the blind check of PDCCH, to realize the uplink synchronous of user side and network side.Described method comprises: UE receives Stochastic accessing configuration information, and determines exclusive preamble sequence that the community that needs to carry out Stochastic accessing uses and exclusive PRACH resource according to described configuration information; Described UE sends described exclusive preamble sequence by described exclusive PRACH resource to base station on described community; Described UE detects the PDCCH adopting RA-RNTI scrambling in dedicated search space, from described PDCCH, obtain accidental access response, and described accidental access response at least comprises for the described TA that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.The invention also discloses the device for realizing described method.

Description

A kind of method of Stochastic accessing and device

Technical field

The present invention relates to the communications field, particularly relate to method and the device of Stochastic accessing.

Background technology

Random access procedure (Randomaccessprocedure) is for setting up subscriber equipment (UE, UserEquipment) with the uplink synchronous of base station (eNB), by configure in systems in which for using PRACH (PhysicalRandomAccessChannel in the sub-frame of uplink of Stochastic accessing, Physical Random Access Channel) send random access guiding (preamble) sequence, and receive the accidental access response (RAR of base station feedback, RandomAccessResponse), uplink synchronous is realized.Random access procedure is divided into competition Stochastic accessing and non-competing Stochastic accessing.

Non-competing random access procedure is shown in Figure 1, and it comprises: UE receives the message (Msg0) for configuring exclusive preamble and the PRACH resource that non-competing Stochastic accessing uses that eNB sends.The content of Msg0 carrying at least comprises ra-PreambleIndex (RandomAccessPreamble) and ra-PRACH-MaskIndex (PRACHMaskIndex).Ra-PreambleIndex is used to indicate dedicated preamble numbering, and ra-PRACH-MaskIndex is used to indicate PRACH resource number.UE sends the dedicated preamble sequence (Msg1) of configuration in corresponding PRACH resource to eNB according to PRACH resource number.UE is by PDSCH (PhysicalDownlinkSharedChannel, Physical Downlink Shared Channel) receive the RAR (Msg2) that eNB returns, wherein RAR is by RA-RNTI (RandomAccess-RadioNetworkTemporaryIdentifier, the wireless network of Stochastic accessing identifies temporarily) PDCCH (PhysicalDownlinkControlChannel of scrambling, Physical Downlink Control Channel) scheduling, the PDSCH that this PDCCH dispatches transmits, the RAR of multiple UE can be comprised in this PDSCH, the RAR of each UE comprises TA value and transmits uplink scheduling license (ULgrant) of (or follow-up uplink) for dispatching this UEMsg3.RA-RANTI and PRACH resource one_to_one corresponding, PRACH resource is corresponding RA-RNTI, a RA-RNTI=1+t_id+10*f_id only, wherein: t_id is the numbering of first subframe corresponding to PRACH resource, value 0≤t_id < 10; F_id is that in a subframe, PRACH resource, in the numbering of frequency domain, is numbered according to frequency domain ascending order, value (0≤f_id < 6).The UE that have sent preamble needs the PDCCH monitoring RA-RNTI scrambling in the RAR receiver window of in-system define, if detected, and comprise the preamble mark that it sends in this RAR, then UE thinks that RAR receives successfully, and apply the TA (TimeAlignment carried in this RAR, Timing Advance) carry out uplink synchronous adjustment, represent Stochastic accessing success, then random access procedure terminates.

UE needs to determine PRACH resource before sending Msg1.At LTE (LongTermEvolution, Long Term Evolution) in system, define 5 kinds of PRACH (Preamble) structures, the length to some extent difference of often kind of structure in time domain, as shown in table 1, frequency domain is all take 6 PRB (PhysicalResourceBlock, Physical Resource Block) (i.e. 72 subcarriers).For FDD (FrequencyDivisionDuplex, Frequency Division Duplexing (FDD)) system, in a subframe, there is a PRACH at the most.For TDD (TimeDivisionDuplex, time division duplex) system, 6 PRACH in a subframe, are had at most to carry out frequency division multiplexing.According to transmission density and the preambleformat (targeting sequencing form) of PRACH, 64 kinds of PRACH configurations are defined in FDD system, TDD system defines 58 kinds of PRACH configurations, often kind of PRACH configures the sub-frame set that can be used to send PRACH in a kind of preambleformat (targeting sequencing form) and a radio frames used in this system of correspondence, the PRACH configuration index (PRACHConfigurationIndex) that high-level signaling notice UE uses.

Table 1, Preamble parameter

From above flow process, in Msg2, eNB all needs to be dispatched by PDCCH by the RAR of PDSCH transmission, and transmits on PDSCH.

For LTE-A (LongTermEvolutionAdvanced, long-term evolution upgrading) system, for supporting than LTE (LongTermEvolution, Long Term Evolution) system bandwidth that system is larger, some spectrum aggregatings of existing system can be distributed to, gather into large bandwidth to use, i.e. carrier aggregation technology (CA, CarrierAggregation).Now in system, up-downgoing carrier wave can asymmetricly configure, and namely user may take N1 >=1 (N1 is parameter preset) individual carrier wave and carries out downlink transfer, and N2 >=1 (N2 is parameter preset) individual carrier wave carries out uplink, as shown in Figure 2.

In LTE-ARel-10 (version 10) CA system, up direction only supports continuous print carrier aggregation, and each UE is by base station assigns Pcell (Primarycell, main plot): a descending carrier and a up-link carrier are comprised for a Cell (community) FDD system, namely a Cell is become for a carrier wave TDD system.In LTE-ARel-10, the Stochastic accessing of CAUE occurs over just on Pcell, and all Cell use identical TA to carry out uplink synchronous adjustment.UE only needs blind check public search space on PCell, to determine the PDCCH dispatching RAR.On SCell (Secondarycell, auxiliary community), UE only needs blind check UE dedicated search space, to obtain the PDCCH for data dispatch.For the UE ability of Rel-10, CAUE in the design of physical layer PDCCH blind check number of times, not included on SCell to the blind check of public search space.

Different from LTE-ARel-10 system, LTE-ARel-11 (version 11) system needs to support more complicated carrier aggregation scene, comprising: the 1) carrier aggregation of up different frequency range; 2) the carrier aggregation deployment scheme that mixes of macro base station (MacroeNB) and RRH (RemoteRadioHead, long distance wireless head).Wherein the example of the carrier aggregation deployment scheme of macro base station and RRH mixing as shown in Figure 3 and Figure 4.For Fig. 3, frequency F1 is used by macro base station, and provide grand covering, frequency F2 is used by RRH, provides the higher throughput of hot zones.UE in high-speed mobile carries out work in the frequency of F1, ensures that business continuity is capable.F1 and F2 is in different frequency ranges in frequency, and such as F1 is positioned in 800MHz or 2GHz frequency range, and F2 is positioned in 3.5GHz frequency range.In the geographic area that F2RRH covers, F2 can carry out carrier aggregation with F1.For Fig. 4, frequency F1 and F2 is used by macro base station, and due to frequency range, F2 compares F1 and has less coverage, therefore disposes RRH at the cell edge of F2 and carries out covering expansion.Cover overlapping region at F1 and F2, F1 and F2 can carry out carrier aggregation.

Because the radio signal propagation characteristic of different frequency range is different, if therefore UE sends signal to base station on the member carrier being positioned at two distant frequency ranges simultaneously, then the time that two signals arrive base stations there will be difference.In addition, according to the example in Fig. 3 and Fig. 4, if UE is in the geographic area that macro base station and RRH cover jointly, and carried out the carrier aggregation of F1 and F2, then because F1 is that macro base station uses, F2 is that RRH uses, then the signal in two frequencies is through different propagation paths, and difference appears in the time that the signal causing UE simultaneously to send on F1 and F2 arrives base station.Therefore, in the carrier aggregation of different frequency range, or in the carrier aggregation deployment scenario of macro base station and RRH mixing, Pcell with Scell signal path is different can cause the transmission time different, multiple community Cell needs independently to set up and safeguards the uplink synchronous with base station, therefore need to be supported on Scell and carry out Stochastic accessing, to realize uplink synchronous adjustment.The Random Access of above-mentioned scene is not defined in current standard.

Summary of the invention

The embodiment of the present invention provides a kind of method and device of Stochastic accessing, for realizing random access procedure, especially on auxiliary community, realizes random access procedure, so that user side and network side realize uplink synchronous and do not increase the blind check of UE to PDCCH.

A method for Stochastic accessing, is applied to UE side, comprises the following steps:

User equipment (UE) receives the Stochastic accessing configuration information that base station sends, and determines exclusive random access guiding preamble sequence that the community that needs to carry out Stochastic accessing uses and the dedicated physical Random Access Channel PRACH resource for sending described exclusive preamble sequence according to described configuration information;

Described UE sends described exclusive preamble sequence by the described exclusive PRACH resource determined to base station on the community needing to carry out Stochastic accessing;

Described UE detects the physical downlink control channel PDCCH adopting random access radio network temporary mark RA-RNTI scrambling in the dedicated search space of described UE, have sent the accidental access response of the community of exclusive preamble sequence described in obtaining from described PDCCH, described accidental access response at least comprises for the described timing advance TA that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.

A method for Stochastic accessing, is applied to base station side, comprises the following steps:

Base station sends Stochastic accessing configuration information to user equipment (UE), needs cell configuration exclusive random access guiding preamble sequence and the dedicated physical Random Access Channel PRACH resource of carrying out Stochastic accessing for described UE;

Described base station is configuring to the exclusive preamble sequence exclusive PRACH resource of described UE receiving described UE transmission;

Timing advance TA value corresponding to the community of described exclusive preamble sequence is determined to receive according to the exclusive preamble sequence received in described base station;

Described base station is in the dedicated search space of described UE, by the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, send accidental access response to described UE, described accidental access response at least comprises for the described TA receiving the uplink synchronous adjustment of the community of exclusive preamble sequence.

A kind of subscriber equipment, comprising:

Receiver module, for receiving the Stochastic accessing configuration information that base station sends;

Control module, for determining exclusive random access guiding preamble sequence that the community needing to carry out Stochastic accessing uses and the dedicated physical Random Access Channel PRACH resource for sending described exclusive preamble sequence according to described configuration information;

Sending module, for sending described exclusive preamble sequence by the described exclusive PRACH resource determined to base station on the community needing to carry out Stochastic accessing;

Described receiver module also for detecting the physical downlink control channel PDCCH adopting random access radio network temporary mark RA-RNTI scrambling in the dedicated search space of described UE, have sent the accidental access response of the community of exclusive preamble sequence described in obtaining from described PDCCH, described accidental access response at least comprises for the described timing advance TA that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.

A kind of base station, comprising:

Sending module, for sending Stochastic accessing configuration information to user equipment (UE), needs cell configuration exclusive random access guiding preamble sequence and the dedicated physical Random Access Channel PRACH resource of carrying out Stochastic accessing for described UE;

Receiver module, for configuring to the exclusive preamble sequence exclusive PRACH resource of described UE receiving described UE transmission;

Control module, the timing advance TA value that the community for determining to receive described exclusive preamble sequence according to the exclusive preamble sequence received is corresponding;

Described sending module is also in the dedicated search space of described UE, by the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, send accidental access response to described UE, described accidental access response at least comprises for the described TA receiving the uplink synchronous adjustment of the community of exclusive preamble sequence.

In the dedicated search space of UE, utilize the Physical Downlink Control Channel (PDCCH) of random access radio network temporary mark (RA-RNTI) scrambling to transmit accidental access response in the embodiment of the present invention, achieve random access procedure, be particularly useful for SCell, the PDCCH of RA-RNTI scrambling is at the dedicated search space propagation of UE, do not increase the blind check number of times of UE to PDCCH, and do not need at PDSCH transmission accidental access response, also just avoid on SCell and dispatch PDSCH transmission by the PDCCH of RA-RNTI scrambling, compared with the PDSCH dispatched at the PDCCH of RA-RNTI scrambling with accidental access response transmits, save the expense of downlink data transmission to a certain extent.

Accompanying drawing explanation

Fig. 1 is the method flow diagram of non-competing Stochastic accessing in prior art;

Fig. 2 is the schematic diagram of prior art intermediate frequency spectrum polymerization;

Fig. 3 and Fig. 4 is the schematic diagram of macro base station and RRH mixed deployment in prior art;

Fig. 5 be in the embodiment of the present invention Stochastic accessing at the method flow diagram of UE side;

Fig. 6 be in the embodiment of the present invention Stochastic accessing at the method flow diagram of base station side;

Fig. 7 is not across the method flow diagram of Stochastic accessing during carrier dispatching in the embodiment of the present invention;

Fig. 8 is the method flow diagram across Stochastic accessing during carrier dispatching in the embodiment of the present invention;

Fig. 9 is the structure chart of UE in the embodiment of the present invention;

Figure 10 is the structure chart of base station in the embodiment of the present invention.

Embodiment

See Fig. 5, in the present embodiment, Stochastic accessing is as follows at the method flow of UE side:

Step 501:UE receives the Stochastic accessing configuration information that base station sends, and determines exclusive random access guiding (preamble) sequence that the community that needs to carry out Stochastic accessing uses and dedicated physical Random Access Channel (PRACH) resource for sending described exclusive preamble sequence according to described configuration information.Concrete, described UE receives by PDCCH order (order) or wireless heterogeneous networks (RRC) signaling the Stochastic accessing configuration information that base station sends, and described Stochastic accessing configuration information at least comprises configuration and needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

Step 502: described UE sends described exclusive preamble sequence by the described exclusive PRACH resource determined to base station on the community needing to carry out Stochastic accessing.

Step 503: described UE detects the Physical Downlink Control Channel (PDCCH) adopting random access radio network temporary mark (RA-RNTI) scrambling in the dedicated search space of described UE, have sent the accidental access response of the community of exclusive preamble sequence from described PDCCH described in obtaining.Described accidental access response at least comprises for the described Timing Advance (TA) that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.UE can carry out uplink synchronous adjustment according to the value of this TA.

Preferably, described accidental access response also comprise described in have sent uplink scheduling license ULgrant signaling corresponding to the community of exclusive preamble sequence.

UE is corresponding in the described community that have sent exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, detects the PDCCH of described RA-RNTI scrambling.

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, the community of the dispatch that the community for have sent exclusive preamble sequence described in transmitting is corresponding and the described community that have sent exclusive preamble sequence are same community.Then, detect the PDCCH of described RA-RNTI scrambling in the dedicated search space of the described UE of described UE on the described community that have sent exclusive preamble sequence, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling.Such as, UE have sent exclusive preamble sequence on community 1, and the dispatch of community 1 just sends on community 1, detects the PDCCH of RA-RNTI scrambling in the UE dedicated search space of ZeUE community 1, therefrom obtains the TA of respective cell 1; The accidental access response carried in the PDCCH of the RA-RNTI scrambling that UE detects on community 1 is the accidental access response of community 1.

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, the community of the dispatch that the community for have sent exclusive preamble sequence described in transmitting is corresponding may be different districts with the described community that have sent described exclusive preamble sequence.Then, described UE is carrying out in the dedicated search space across the described UE on the community of carrier dispatching to the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.Such as, UE have sent exclusive preamble sequence in community 2 and community 3, the schedule information of community 2 and community 3 sends on community 1, detects the PDCCH of RA-RNTI scrambling in the UE dedicated search space of ZeUE community 1, therefrom obtains the TA of respective cell 1 and community 2; Wherein, the accidental access response respective cell 2 carried in the PDCCH of multiple RA-RNTI scramblings that UE detects on community or community 3, indicated by the carrier wave instructions field carried in PDCCH.

It should be noted that, above-mentioned UE dedicated search space specifically refers to the community for have sent the dispatch of the community of exclusive preamble sequence described in transmit, and corresponds to the part searches space that this have sent the community of exclusive preamble sequence in the dedicated search space of described UE.

Preferably, the DCI format (format) that the transmission mode that have sent the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprises for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

If only comprise TA order in the accidental access response carried in the PDCCH of described RA-RNTI scrambling, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+A, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.Preferably, described K=11, described A=3.Such as, if described K=11, described A=3, then such as, for FDD and TDD system: all can use for the DCIformat carrying ULgrant and DLgrant at UE dedicated search space propagation of existing definition, DCIformat0/1/1A/1B/2/2A/2B/2C/4 etc.; Namely the DCIformat supported under have sent the transmission mode of the community of exclusive preamble sequence can be used for transmitting accidental access response.

Or, if comprise TA order and ULgrant in the accidental access response carried in the PDCCH of described RA-RNTI scrambling simultaneously, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in have sent the bit number of ULgrant corresponding to the community of exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L+A, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in have sent the bit number of ULgrant corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.Preferably, described K=11, described L=20, described A=3.Such as, if described K=11, described L=20, described A=3, then for TDD system (no matter whether adopting across carrier dispatching), available DCIformat comprises: DCIformat0 (upstream bandwidth being applicable to described community is not less than 20MHz), DCIformat1/1B/1D (downlink bandwidth being applicable to described community is not less than 10MHz), DCIformat1A (downlink bandwidth being applicable to described community is not less than 20MHz), DCIformat2/2A/2B/2C (can use arbitrary bandwidth of described community), DCIformat4 (upstream bandwidth being applicable to described community is not less than 3MHz), for FDD system (no matter whether adopting across carrier dispatching), available DCIformat comprises: DCIformat1 (downlink bandwidth being applicable to described community is not less than 10MHz), DCIformat2 (can use arbitrary bandwidth of described community), DCIformat2A/2C (downlink bandwidth being applicable to described community is not less than 3MHz), DCIformat2B (downlink bandwidth being applicable to described community is not less than 5MHz), DCIformat4 (upstream bandwidth being applicable to described community is not less than 5MHz), namely, in the DCIformat supported under have sent the transmission mode of the community of exclusive preamble sequence, the DCIformat meeting above-mentioned condition can be used for transmitting accidental access response.

Preferably, described in the present embodiment need to carry out Stochastic accessing community and/or described in have sent exclusive preamble sequence community be the auxiliary community of described UE, the random access scheme that the present embodiment provides is particularly useful for auxiliary community, does not certainly also get rid of and is applied in main plot.PRACH configuration on each Scell can be identical with Pcell, also can be different.Especially, when defining multiple community in system and sharing a TA as a TA group (group), described community also can refer to pre-defined (making an appointment in UE and base station) or signal deployment (high-level signaling or PDCCH signaling at least one community that the TAgroup of a shared TA comprises, wherein high-level signaling can comprise wireless heterogeneous networks (RRC) signaling or medium education (MAC) signaling) a community, for the community belonging to same TAgroup, UE only needs to carry out above-mentioned random access procedure on a community of pre-defined or signal deployment, obtain TA value, and this TA is applied to all communities belonging to this TAgroup.

Preferably, in the accidental access response receive window (RARwindow) of the only in-system define of UE described in the present embodiment, in the dedicated search space of described UE, the PDCCH of described RA-RNTI scrambling is detected; If exceed RARwindow, UE does not still receive the PDCCH of described RA-RNTI scrambling, then UE can think and resends the exclusive preamble sequence of described community by this random access failure.

Relative with UE side, see Fig. 6, in the present embodiment, Stochastic accessing is as follows at the method flow of base station side:

Step 601: base station sends Stochastic accessing configuration information to subscriber equipment (UE), needs the exclusive random access guiding of the configuration of the community of carrying out Stochastic accessing (preamble) sequence and dedicated physical Random Access Channel (PRACH) resource for this UE.Concrete, base station sends Stochastic accessing configuration information by PDCCH order order or radio resource control RRC signaling to UE, and described Stochastic accessing configuration information at least comprises the index information configured to the index information of exclusive random access guiding (preamble) sequence of described UE and dedicated physical Random Access Channel (PRACH) resource.

Step 602: described base station is configuring to the exclusive preamble sequence exclusive PRACH resource of described UE receiving described UE transmission.

Step 603: Timing Advance (TA) value corresponding to the community of described exclusive preamble sequence is determined to receive according to the exclusive preamble sequence received in base station.

Step 604: base station is in the dedicated search space of described UE, by the Physical Downlink Control Channel (PDCCH) of random access radio network temporary mark (RA-RNTI) scrambling, send accidental access response to described UE, described accidental access response at least comprises for the described TA receiving the uplink synchronous adjustment of the community of exclusive preamble sequence.

Base station is corresponding in the described community receiving exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, by the PDCCH of described RA-RNTI scrambling, sends accidental access response to described UE.

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, the community of the dispatch that the community for receiving exclusive preamble sequence described in transmitting is corresponding and the described community receiving exclusive preamble sequence are same community.Then, in the dedicated search space of the described UE of base station on the community receiving exclusive preamble sequence, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling.Such as, base station receives exclusive preamble sequence on community 1, and the dispatch of community 1 just sends on community 1, then the PDCCH of RA-RNTI scrambling is transmitted in base station in the UE dedicated search space of community 1, and the TA of respective cell 1 is sent to UE; The accidental access response carried in the PDCCH of the RA-RNTI scrambling of transmission on community 1 is the accidental access response of community 1.

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, the community of the dispatch that the community for receiving exclusive preamble sequence described in transmitting is corresponding may be different districts with the described community receiving exclusive preamble sequence.Then, described base station is being carried out in the dedicated search space across the described UE on the community of carrier dispatching to the described community receiving exclusive preamble sequence, transmit the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

Preferably, the DCI format (format) that the transmission mode receiving the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprises for carrying the uplink scheduling license DCIformat of (ULgrant) and the DCIformat for bearing downlink scheduling grant (DLgrant).

If only comprise TA order in the accidental access response carried in the PDCCH of described RA-RNTI scrambling, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+A, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.Preferably, described K=11, described A=3.Such as, if described K=11, described A=3, then such as, for FDD and TDD system: all can use for the DCIformat carrying ULgrant and DLgrant at UE dedicated search space propagation of existing definition, DCIformat0/1/1A/1B/2/2A/2B/2C/4 etc.; Namely the DCIformat supported under receiving the transmission mode of the community of exclusive preamble sequence can be used for transmitting accidental access response.

Preferably, described in the present embodiment need to carry out Stochastic accessing community and/or described in have sent exclusive preamble sequence community be the auxiliary community of described UE, the random access scheme that the present embodiment provides is particularly useful for auxiliary community, does not certainly also get rid of and is applied in main plot.PRACH configuration on each Scell can be identical with Pcell, also can be different.Especially, when defining multiple community in system and sharing a TA as a TA group (group), described community also can refer to pre-defined (making an appointment in UE and base station) or signal deployment (high-level signaling or PDCCH signaling at least one community that the TAgroup of a shared TA comprises, wherein high-level signaling can comprise wireless heterogeneous networks (RRC) signaling or medium education (MAC) signaling) a community, for the community belonging to same TAgroup, base station only needs to carry out above-mentioned random access procedure on a community of pre-defined or signal deployment, send TA value, this TA value can be applicable to all communities belonging to this TAgroup.

Owing to existing across carrier dispatching with not across carrier dispatching two kinds of situations, introduce implementation procedure in detail below by two exemplary embodiments.

See Fig. 7, not as follows across the method flow of Stochastic accessing during carrier dispatching in the present embodiment:

Step 701: base station sends Stochastic accessing configuration information by PDCCHorder or RRC signaling to UE.Described Stochastic accessing configuration information at least comprises the index information configured to the index information of the exclusive preamble sequence of described UE and exclusive PRACH resource.

After step 702:UE receives Stochastic accessing configuration information, determine exclusive preamble sequence that the community that needs to carry out Stochastic accessing uses and the exclusive PRACH resource for sending described exclusive preamble sequence according to described configuration information.

Step 703:UE sends described exclusive preamble sequence by the described exclusive PRACH resource determined to base station on the community needing to carry out Stochastic accessing.

Step 704: after base station receives exclusive preamble sequence, determines to receive TA value corresponding to the community of described exclusive preamble sequence according to the exclusive preamble sequence received.

Step 705: in the dedicated search space of the described UE of base station on the community receiving exclusive preamble sequence, by the PDCCH of RA-RNTI scrambling, send accidental access response to described UE, described accidental access response at least comprises the TA of the uplink synchronous adjustment of the community for receiving exclusive preamble sequence.The community of dedicated preamble sequence is have received described in the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to.When described accidental access response only comprises the TA of uplink synchronous adjustment of the community for receiving exclusive preamble sequence, the DCIformat that PDCCH adopts is that carrying bit number is not less than the DCIformat of K, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence; Or, when described accidental access response also comprises uplink scheduling license ULgrant signaling corresponding to the community that receives exclusive preamble sequence, the DCIformat that PDCCH adopts is the DCIformat that carrying bit number is not less than K+L, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in receive the bit number of ULgrant corresponding to the community of exclusive preamble sequence.

The PDCCH of described RA-RNTI scrambling is detected in the dedicated search space of the described UE of step 706:UE on the described community that have sent exclusive preamble sequence.The community of dedicated preamble sequence is have sent described in the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to.

See Fig. 8, as follows across the method flow of Stochastic accessing during carrier dispatching in the present embodiment:

Step 801: base station sends Stochastic accessing configuration information by PDCCHorder or RRC signaling to UE.Described Stochastic accessing configuration information at least comprises the index information configured to the index information of the exclusive preamble sequence of described UE and exclusive PRACH resource.

After step 802:UE receives Stochastic accessing configuration information, determine exclusive preamble sequence that the community that needs to carry out Stochastic accessing uses and the exclusive PRACH resource for sending described exclusive preamble sequence according to described configuration information.

Step 803:UE sends described exclusive preamble sequence by the described exclusive PRACH resource determined to base station on the community needing to carry out Stochastic accessing.

Step 804: after base station receives exclusive preamble sequence, determines to receive TA value corresponding to the community of described exclusive preamble sequence according to the exclusive preamble sequence received.

Step 805: the community that base station is receiving exclusive preamble sequence is corresponding, in the dedicated search space of the described UE on the community of transmitting the dispatch of this community, by the PDCCH of RA-RNTI scrambling, send accidental access response to described UE, described accidental access response at least comprises the TA of the uplink synchronous adjustment of the community for receiving exclusive preamble sequence.The accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

When described accidental access response only comprises the TA of uplink synchronous adjustment of the community for receiving exclusive preamble sequence, the DCIformat that PDCCH adopts is the DCIformat that carrying bit number is not less than K+A, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.Or, when described accidental access response also comprises uplink scheduling license ULgrant signaling corresponding to the community that receives exclusive preamble sequence, the DCIformat that PDCCH adopts is the DCIformat that carrying bit number is not less than K+L+A, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in receive the bit number of ULgrant corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.

The community that step 806:UE have sent exclusive preamble sequence is corresponding, detects the PDCCH of described RA-RNTI scrambling in the dedicated search space of the described UE on the community of transmitting the dispatch of this community.And the information that the carrier wave instructions field carried in PDCCH by described RA-RNTI scrambling comprises determines the community that the accidental access response that carries in the PDCCH of described RA-RNTI scrambling is corresponding.

By the foregoing describing the implementation procedure of having separated Stochastic accessing, this process realizes primarily of UE and base station, is introduced below to the internal structure of these two equipment and function.

See Fig. 9, in the present embodiment, UE comprises: receiver module 901, control module 902 and sending module 903.

The Stochastic accessing configuration information that receiver module 901 sends for receiving base station.Concrete, receiver module 901 receives by PDCCH order (order) or wireless heterogeneous networks (RRC) signaling the Stochastic accessing configuration information that base station sends, and described Stochastic accessing configuration information at least comprises configuration and needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

Control module 902 is for determining exclusive random access guiding preamble sequence that the community needing to carry out Stochastic accessing uses and the dedicated physical Random Access Channel PRACH resource for sending described exclusive preamble sequence according to described configuration information.

Sending module 903 for sending described exclusive preamble sequence by the described exclusive PRACH resource determined to base station on the community needing to carry out Stochastic accessing.

Described receiver module 901 also for detecting the physical downlink control channel PDCCH adopting random access radio network temporary mark RA-RNTI scrambling in the dedicated search space of described UE, have sent the accidental access response of the community of exclusive preamble sequence described in obtaining from described PDCCH, described accidental access response at least comprises for the described timing advance TA that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.

Preferably, described accidental access response also comprise described in have sent uplink scheduling license (ULgrant) signaling corresponding to the community of exclusive preamble sequence.

Described receiver module 901, specifically for corresponding in the described community that have sent exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, detects the PDCCH of described RA-RNTI scrambling.

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described receiver module 901 is in the dedicated search space of the described UE on the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling.

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described receiver module 901 is for carrying out in the dedicated search space across the described UE on the community of carrier dispatching to the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

Preferably, the DCI format format that the transmission mode that have sent the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprise for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+A, described K is for have sent the bit number of the TA order of the community of exclusive preamble sequence described in correspondence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.

Or, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in have sent the bit number of ULgrant corresponding to the community of exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L+A, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in have sent the bit number of ULgrant corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.

Preferably, described K=11, described L=20, described A=3.

Described need to carry out Stochastic accessing community and/or described in have sent exclusive preamble sequence community be the auxiliary community of described UE.

See Figure 10, in the present embodiment, base station comprises: sending module 1001, receiver module 1002 and control module 1003.

Sending module 1001, for sending Stochastic accessing configuration information to user equipment (UE), needs the exclusive random access guiding of cell configuration (preamble) sequence and dedicated physical Random Access Channel (PRACH) resource of carrying out Stochastic accessing for described UE.Concrete, sending module 1001 sends Stochastic accessing configuration information by PDCCH order (order) or wireless heterogeneous networks (RRC) signaling to described UE, and described Stochastic accessing configuration information at least comprises configuration and needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

Receiver module 1002 is for configuring to the exclusive preamble sequence exclusive PRACH resource of described UE receiving described UE transmission.

Control module 1003 is for Timing Advance (TA) value corresponding to the community of determining to receive described exclusive preamble sequence according to the exclusive preamble sequence that receives.

Described sending module 1001 is also in the dedicated search space of described UE, by the Physical Downlink Control Channel (PDCCH) of random access radio network temporary mark (RA-RNTI) scrambling, send accidental access response to described UE, described accidental access response at least comprises for the described TA receiving the uplink synchronous adjustment of the community of exclusive preamble sequence.

Preferably, described accidental access response also comprises uplink scheduling license ULgrant signaling corresponding to the community that receives exclusive preamble sequence described in correspondence.

Described sending module 1001 is specifically for corresponding in the described community receiving exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE.

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described sending module 1001 is in the dedicated search space of the described UE on the community receiving exclusive preamble sequence, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling.

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described sending module is for carrying out in the dedicated search space across the described UE on the community of carrier dispatching to the described community receiving exclusive preamble sequence, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

Preferably, the DCI format format that the transmission mode receiving the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprise for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in receive the bit number of ULgrant corresponding to the community of exclusive preamble sequence.

Or, when the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+A, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L+A, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in receive the bit number of ULgrant corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.

Preferably, described K=11, described L=20, described A=3.

Described need to carry out Stochastic accessing community and/or described in receive exclusive preamble sequence community be the auxiliary community of described UE.

In the dedicated search space of UE, utilize the Physical Downlink Control Channel (PDCCH) of random access radio network temporary mark (RA-RNTI) scrambling to transmit accidental access response in the embodiment of the present invention, achieve random access procedure, be particularly useful for SCell, the PDCCH of RA-RNTI scrambling is at the dedicated search space propagation of UE, do not increase the blind check number of times of UE to PDCCH, and do not need at PDSCH transmission accidental access response, also just avoid on SCell and dispatch PDSCH transmission by the PDCCH of RA-RNTI scrambling, compared with the PDSCH dispatched at the PDCCH of RA-RNTI scrambling with accidental access response transmits, save the expense of downlink data transmission to a certain extent.The embodiment of the present invention additionally provides across carrier dispatching with not across the solution of carrier dispatching.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims

1. a method for Stochastic accessing, is characterized in that, comprises the following steps:

Described UE is corresponding in the described community that have sent exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, detect the PDCCH of described RA-RNTI scrambling, have sent the accidental access response of the community of exclusive preamble sequence described in obtaining from described PDCCH, described accidental access response at least comprises for the described timing advance TA that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.

2. the method for claim 1, it is characterized in that, described UE receives the Stochastic accessing configuration information that base station sends and comprises: described UE receives by PDCCH order order or radio resource control RRC signaling the Stochastic accessing configuration information that described base station sends, and described Stochastic accessing configuration information at least comprises configuring needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

3. the method for claim 1, is characterized in that, have sent the uplink scheduling license ULgrant signaling that the community of exclusive preamble sequence is corresponding described in described accidental access response also comprises.

4. the method for claim 1, it is characterized in that, described UE is corresponding in the described community that have sent exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, detect the PDCCH of described RA-RNTI scrambling, specifically comprise: when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, in the dedicated search space of the described UE of described UE on the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling,

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described UE is carrying out in the dedicated search space across the described UE on the community of carrier dispatching to the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

5. the method as described in claim 3 or 4, it is characterized in that, the DCI format format that the transmission mode that have sent the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprise for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

6. method as claimed in claim 5, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence; Or,

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in have sent the bit number of ULgrant corresponding to the community of exclusive preamble sequence; Or,

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+A, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling; Or,

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L+A, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in have sent the bit number of ULgrant corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.

7. method as claimed in claim 6, is characterized in that, described K=11.

8. method as claimed in claim 6, is characterized in that, described L=20.

9. the method according to any one of Claims 1-4, is characterized in that, described need to carry out Stochastic accessing community and/or described in have sent exclusive preamble sequence community be the auxiliary community of described UE.

10. a method for Stochastic accessing, is characterized in that, comprises the following steps:

Described base station is corresponding in the described community receiving exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, described accidental access response at least comprises for the described TA receiving the uplink synchronous adjustment of the community of exclusive preamble sequence.

11. methods as claimed in claim 10, it is characterized in that, the step that base station sends Stochastic accessing configuration information to user equipment (UE) comprises: described base station sends Stochastic accessing configuration information by PDCCH order order or radio resource control RRC signaling to described UE, and described Stochastic accessing configuration information at least comprises configuring needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

12. methods as claimed in claim 10, is characterized in that, receive the uplink scheduling license ULgrant signaling that the community of exclusive preamble sequence is corresponding described in described accidental access response also comprises.

13. methods as claimed in claim 10, it is characterized in that, described base station is corresponding in the described community receiving exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, specifically comprise:

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, in the dedicated search space of the described UE of described base station on the described community receiving exclusive preamble sequence, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling;

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described base station is being carried out in the dedicated search space across the described UE on the community of carrier dispatching to the described community receiving exclusive preamble sequence, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

14. methods as described in claim 12 or 13, it is characterized in that, the DCI format format that the transmission mode receiving the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprise for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

15. methods as claimed in claim 14, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence; Or,

When the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in receive the bit number of ULgrant corresponding to the community of exclusive preamble sequence; Or,

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+A, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling; Or,

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described DCIformat is the DCIformat that carrying bit number is not less than K+L+A, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence, described L for described in receive the bit number of ULgrant corresponding to the community of exclusive preamble sequence, described A is the bit number of the carrier wave instructions field in the PDCCH of described RA-RNTI scrambling.

16. methods as claimed in claim 15, is characterized in that, described K=11.

17. methods as claimed in claim 15, is characterized in that, described L=20.

18. methods according to any one of claim 10 to 13, is characterized in that, described need to carry out Stochastic accessing community and/or described in receive exclusive preamble sequence community be the auxiliary community of described UE.

19. 1 kinds of user equipment (UE)s, is characterized in that, comprising:

Described receiver module is also for corresponding in the described community that have sent exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, detect the PDCCH of described RA-RNTI scrambling, have sent the accidental access response of the community of exclusive preamble sequence described in obtaining from described PDCCH, described accidental access response at least comprises for the described timing advance TA that have sent the uplink synchronous adjustment of the community of exclusive preamble sequence.

20. subscriber equipmenies as claimed in claim 19, it is characterized in that, described receiver module is used for, receive by PDCCH order order or radio resource control RRC signaling the Stochastic accessing configuration information that described base station sends, described Stochastic accessing configuration information at least comprises configuration and needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

21. subscriber equipmenies as claimed in claim 19, is characterized in that, have sent the uplink scheduling license ULgrant signaling that the community of exclusive preamble sequence is corresponding described in described accidental access response also comprises.

22. subscriber equipmenies as claimed in claim 19, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described receiver module is in the dedicated search space of the described UE on the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling;

When the PDCCH of described RA-RNTI scrambling adopts across carrier dispatching, described receiver module is for carrying out in the dedicated search space across the described UE on the community of carrier dispatching to the described community that have sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community indicated by carrier wave instructions field carried in the PDCCH of described RA-RNTI scrambling.

23. subscriber equipmenies as described in claim 21 or 22, it is characterized in that, the DCI format format that the transmission mode that have sent the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprise for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

24. subscriber equipmenies as claimed in claim 23, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in have sent the bit number of TA order corresponding to the community of exclusive preamble sequence; Or,

25. subscriber equipmenies as claimed in claim 24, is characterized in that, described K=11.

26. subscriber equipmenies as claimed in claim 24, is characterized in that, described L=20.

27. subscriber equipmenies according to any one of claim 19 to 22, is characterized in that, described need to carry out Stochastic accessing community and/or described in have sent exclusive preamble sequence community be the auxiliary community of described UE.

28. 1 kinds of base stations, is characterized in that, comprising:

Described sending module is also for corresponding in the described community receiving exclusive preamble sequence, in the dedicated search space of the described UE on the community of transmitting the dispatch of described community, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE, described accidental access response at least comprises for the described TA receiving the uplink synchronous adjustment of the community of exclusive preamble sequence.

29. base stations as claimed in claim 28, it is characterized in that, described sending module is used for, send Stochastic accessing configuration information by PDCCH order order or radio resource control RRC signaling to described UE, described Stochastic accessing configuration information at least comprises configuration and needs the index information of the exclusive preamble sequence of the community of carrying out Stochastic accessing and the index information of exclusive PRACH resource to described UE.

30. base stations as claimed in claim 28, is characterized in that, receive the uplink scheduling license ULgrant signaling that the community of exclusive preamble sequence is corresponding described in described accidental access response also comprises.

31. base stations as claimed in claim 28, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described sending module is in the dedicated search space of the described UE on the described community receiving exclusive preamble sequence, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UrE, the accidental access response carried in the PDCCH of described RA-RNTI scrambling corresponds to the community at the PDCCH transmission place of described RA-RNTI scrambling;

32. base stations as described in claim 30 or 31, it is characterized in that, the DCI format format that the transmission mode receiving the community of exclusive preamble sequence described in the PDCCH employing of described RA-RNTI scrambling is supported, described DCIformat comprise for carrying the uplink scheduling license DCIformat of ULgrant and the DCIformat for bearing downlink scheduling grant DLgrant.

33. base stations as claimed in claim 32, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt across carrier dispatching, described DCIformat is that carrying bit number is not less than the DCIformat of K, described K for described in receive the bit number of TA order corresponding to the community of exclusive preamble sequence; Or,

34. base stations as claimed in claim 33, is characterized in that, described K=11.

35. base stations as claimed in claim 33, is characterized in that, described L=20.

36. base stations according to any one of claim 28 to 31, is characterized in that, described need to carry out Stochastic accessing community and/or described in receive exclusive preamble sequence community be the auxiliary community of described UE.