CN102271418A

CN102271418A - Random access method and device

Info

Publication number: CN102271418A
Application number: CN2011102141918A
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: 2011-12-07
Anticipated expiration: 2031-07-28
Also published as: CN102271418B

Abstract

The invention discloses a random access method, which is used for realizing a random access process to realize uplink synchronization between a user side and a network side on the basis of not increasing the physical downlink control channel (PDCCH) blind detection of user equipment (UE). The method comprises that: the UE receives random access configuration information, and determines a dedicated preamble sequence and dedicated physical random access channel (PRACH) resources used by a cell required to perform random access according to the configuration information; the UE transmits the dedicated preamble sequence to an evolved NodeB (eNB) by the dedicated PRACH resources; and the UE detects a PDCCH scrambled by adopting a random access-radio network temporary identifier (RA-RNTI) in a dedicated searching space, and acquires a random access response to the PDCCH, wherein the random access response at least comprises a time alignment (TA) used for regulating the uplink synchronization of the cell transmitting the dedicated preamble sequence. The invention also discloses a device for implementing the method.

Description

A kind of method and device that inserts at random

Technical field

The present invention relates to the communications field, particularly relate to the method and the device that insert at random.

Background technology

Random access procedure (Random access procedure) is used to set up subscriber equipment (UE, User Equipment) with the uplink synchronous of base station (eNB), use PRACH (Physical Random Access Channel by the sub-frame of uplink that is used for inserting at random that in system, disposes, Physical Random Access Channel) sends random access guiding (preamble) sequence, and the accidental access response (RAR of reception base station feedback, Random Access Response), realize uplink synchronous.Random access procedure is divided into competition and inserts at random and non-competing access at random.

Non-competing random access procedure is referring to shown in Figure 1, and it comprises: UE receives that eNB sends is used to dispose the non-competing message (Msg0) that inserts employed exclusive preamble and PRACH resource at random.The content of Msg0 carrying comprises ra-PreambleIndex (Random Access Preamble) and ra-PRACH-MaskIndex (PRACH Mask Index) at least.Ra-PreambleIndex is used to indicate the dedicated preamble numbering, and ra-PRACH-MaskIndex is used to indicate the PRACH resource number.UE sends the dedicated preamble sequence (Msg1) of configuration to eNB on corresponding PRACH resource according to the PRACH resource number.UE is by PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) receives the RAR (Msg2) that eNB returns, wherein RAR is by RA-RNTI (Random Access-Radio Network Temporary Identifier, the wireless network of Jie Ruing is discerned temporarily at random) PDCCH (the Physical Downlink Control Channel of scrambling, Physical Downlink Control Channel) scheduling, on the PDSCH of this PDCCH scheduling, transmit, the RAR that can comprise a plurality of UE among this PDSCH comprises the TA value and is used to dispatch the uplink scheduling permission (UL grant) that this UE Msg3 transmits (perhaps follow-up uplink) among the RAR of each UE.RA-RANTI is corresponding one by one with the PRACH resource, the only corresponding RA-RNTI of PRACH resource, and RA-RNTI=1+t_id+10*f_id, wherein: t_id is the numbering of first subframe of PRACH resource correspondence, value 0≤t_id＜10; F_id is that the PRACH resource is numbered value (0≤f_id＜6) in the numbering of frequency domain in the subframe according to the frequency domain ascending order.The UE that has sent preamble needs the PDCCH of the interior RA-RNTI of monitoring of the RAR receiver window scrambling of in-system define, if detect, and the preamble sign that comprises its transmission among this RAR, then UE thinks that RAR receives successfully, and use TA (the Time Alignment that carries among this RAR, Timing Advance) carry out the uplink synchronous adjustment, expression inserts successfully at random, and then random access procedure finishes.

UE needs to determine the PRACH resource before sending Msg1.At LTE (Long Term Evolution, Long Term Evolution) in the system, defined 5 kinds of PRACH (Preamble) structure, the length of every kind of structure on time domain is difference to some extent, as shown in table 1, all be to take 6 PRB (Physical Resource Block, Physical Resource Block) (i.e. 72 subcarriers) on frequency domain.For FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) system, a PRACH is arranged at the most in the subframe.For TDD (Time Division Duplex, time division duplex) system, there are 6 PRACH to carry out frequency division multiplexing in the subframe at most.Transmission density and preamble format (targeting sequencing form) according to PRACH, 64 kinds of PRACH configurations have been defined in the FDD system, TDD system definition 58 kinds of PRACH configurations, can be used to send the subframe set of PRACH in a kind of preamble format (targeting sequencing form) that every kind of PRACH configuration is corresponding uses in this system and the radio frames, high-level signaling is notified the employed PRACH configuration index of UE (PRACH Configuration Index).

Table 1, Preamble parameter

By above flow process as can be known, in Msg2, eNB all needs the scheduling by PDCCH by the RAR of PDSCH transmission, and transmits on PDSCH.

For LTE-A (Long Term Evolution Advanced, long-term evolution upgrading) system, for supporting than LTE (Long Term Evolution, Long Term Evolution) the bigger system bandwidth of system, can some spectrum aggregatings of existing system will be distributed to, gather into big bandwidth and use, be i.e. carrier aggregation technology (CA, Carrier Aggregation).The up-downgoing carrier wave can asymmetricly dispose in this moment system, and promptly the user may take the individual carrier wave in N1 〉=1 (N1 is a parameter preset) and carries out downlink transfer, and the individual carrier wave in N2 〉=1 (N2 is a parameter preset) carries out uplink, as shown in Figure 2.

In LTE-A Rel-10 (version 10) the CA system, up direction is only supported continuous carrier aggregation, and each UE is by Pcell (Primary cell of base station assigns, the main plot): a Cell (sub-district) comprises a descending carrier and a up-link carrier for the FDD system, and a carrier wave promptly becomes a Cell for the TDD system.The access at random of CA UE occurs over just on the Pcell among the LTE-A Rel-10, and all Cell use identical TA to carry out the uplink synchronous adjustment.UE only need be on PCell blind check common search space, to be identified for dispatching the PDCCH of RAR.On SCell (Secondary cell, auxilliary sub-district), UE only needs blind check UE dedicated search space, to obtain the PDCCH that is used for data dispatch.For the UE ability of Rel-10, CA UE is not included in the last blind check to the common search space of SCell in the design of physical layer PDCCH blind check number of times.

Different with LTE-A Rel-10 system, LTE-A Rel-11 (version 11) system need support more complicated carrier aggregation scene, comprising: the 1) carrier aggregation of up different frequency range; 2) the carrier aggregation deployment scheme of macro base station (Macro eNB) and RRH (Remote Radio Head, long distance wireless head) mixing.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 grand covering is provided, and frequency F2 is used by RRH, and the more high-throughput of hot zones is provided.UE in the high-speed mobile carries out work on the frequency of F1, guarantee professional row continuously.F1 is in different frequency ranges with F2 on frequency, for example F1 is positioned on 800MHz or the 2GHz frequency range, and F2 is positioned on the 3.5GHz frequency range.In the geographic area that F2 RRH covers, F2 can carry out carrier aggregation with F1.For Fig. 4, frequency F1 and F2 are used by macro base station, because frequency range, F2 compares F1 and has littler coverage, therefore dispose RRH at the cell edge of F2 and cover expansion.Cover overlapping areas at F1 and F2, F1 and F2 can carry out carrier aggregation.

Because the radio signal propagation characteristic difference of different frequency range, if therefore UE on the member carrier that is positioned at two distances frequency range far away simultaneously to base station transmit signals, then difference can appear in two signals time of arriving the base station.In addition, according to the example among Fig. 3 and Fig. 4, if UE is in macro base station and the common geographic area that covers of RRH, and carried out the carrier aggregation of F1 and F2, then because F1 is the macro base station use, F2 is that RRH uses, and then the signal on two frequencies is through different propagation paths, and difference appears in the time that the signal that causes UE to send simultaneously on F1 and F2 arrives the base station.Therefore, carrier aggregation at different frequency range, or in the carrier aggregation deployment scenario of macro base station and RRH mixing, Pcell is different with the Scell signal path can to have caused the transmission time difference, a plurality of sub-district Cell need the uplink synchronous of independent foundation and maintenance and base station, therefore need be supported on the Scell and insert at random, to realize the uplink synchronous adjustment.Do not define the access way at random of above-mentioned scene at present in the standard.

Summary of the invention

The embodiment of the invention provides a kind of method and device that inserts at random, is used to realize random access procedure, especially realizes random access procedure on auxilliary sub-district, so that user side and network side are realized uplink synchronous and do not increased the blind check of UE to PDCCH.

A kind of method that inserts at random is applied to the UE side, may further comprise the steps:

User equipment (UE) receives the configuration information of access at random that the base station sends, and determines exclusive random access guiding preamble sequence of using on the sub-district that needs insert at random and the exclusive Physical Random Access Channel PRACH resource that is used to send described exclusive preamble sequence according to described configuration information;

Described UE sends described exclusive preamble sequence by described definite exclusive PRACH resource to the base station on the sub-district that needs insert at random;

Described UE detects the physical downlink control channel PDCCH that adopts random access radio network temporary mark RA-RNTI scrambling in the dedicated search space of described UE, obtain the described accidental access response that has sent the sub-district of exclusive preamble sequence from described PDCCH, described accidental access response comprises at least and is used for the timing advance TA that the described uplink synchronous that has sent the sub-district of exclusive preamble sequence is adjusted.

A kind of method that inserts at random is applied to base station side, may further comprise the steps:

The base station sends to user equipment (UE) and inserts configuration information at random, the cell configuration exclusive random access guiding preamble sequence and the exclusive Physical Random Access Channel PRACH resource that insert at random for the needs of described UE;

Described base station is given in configuration and is received the exclusive preamble sequence that described UE sends on the exclusive PRACH resource of described UE;

The timing advance TA value of the sub-district correspondence of described exclusive preamble sequence is determined to receive in described base station according to the exclusive preamble sequence of receiving;

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

A kind of subscriber equipment comprises:

Receiver module is used to receive the configuration information of access at random that the base station sends;

Control module is used for determining exclusive random access guiding preamble sequence of using on the sub-district that needs insert at random and the exclusive Physical Random Access Channel PRACH resource that is used to send described exclusive preamble sequence according to described configuration information;

Sending module is used for sending described exclusive preamble sequence by described definite exclusive PRACH resource to the base station on the sub-district that needs insert at random;

Described receiver module also is used for detecting the physical downlink control channel PDCCH that adopts random access radio network temporary mark RA-RNTI scrambling in the dedicated search space of described UE, obtain the described accidental access response that has sent the sub-district of exclusive preamble sequence from described PDCCH, described accidental access response comprises at least and is used for the timing advance TA that the described uplink synchronous that has sent the sub-district of exclusive preamble sequence is adjusted.

A kind of base station comprises:

Sending module is used for sending to user equipment (UE) and inserts configuration information at random, the cell configuration exclusive random access guiding preamble sequence and the exclusive Physical Random Access Channel PRACH resource that insert at random for the needs of described UE;

Receiver module is used for giving the exclusive preamble sequence that receives described UE transmission on the exclusive PRACH resource of described UE in configuration;

Control module is used for determining to receive according to the exclusive preamble sequence received the timing advance TA value of the sub-district correspondence of described exclusive preamble sequence;

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

In the dedicated search space of UE, utilize Physical Downlink Control Channel (PDCCH) the transmission accidental access response of random access radio network temporary mark (RA-RNTI) scrambling in the embodiment of the invention, realized random access procedure, be particularly useful for SCell, the PDCCH of RA-RNTI scrambling is in the transmission of the dedicated search space of UE, do not increase the blind check number of times of UE to PDCCH, and need not transmit accidental access response at PDSCH, the PDCCH scheduling PDSCH that has also just avoided SCell to go up by the RA-RNTI scrambling transmits, transmit on the PDSCH of the PDCCH of RA-RNTI scrambling scheduling with accidental access response and to compare, saved the expense of downlink data transmission to a certain extent.

Description of drawings

Fig. 1 is the non-competing method flow diagram that inserts at random in the prior art;

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

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

Fig. 5 is for inserting the method flow diagram in the UE side at random in the embodiment of the invention;

Fig. 6 is for inserting the method flow diagram in base station side at random in the embodiment of the invention;

Fig. 7 is the method flow diagram that inserts at random when not striding carrier dispatching in the embodiment of the invention;

Fig. 8 is the method flow diagram that inserts at random when striding carrier dispatching in the embodiment of the invention;

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

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

Embodiment

Referring to Fig. 5, insert at the method flow of UE side as follows in the present embodiment at random:

Step 501:UE receives the configuration information of access at random that the base station sends, and determines exclusive random access guiding (preamble) sequence of using on the sub-district that needs insert at random and exclusive Physical Random Access Channel (PRACH) resource that is used to send described exclusive preamble sequence according to described configuration information.Concrete, described UE receives the configuration information of access at random that the base station sends by PDCCH order (order) or Radio Resource control (RRC) signaling, and the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

Step 502: described UE sends described exclusive preamble sequence by described definite exclusive PRACH resource to the base station on the sub-district that needs insert at random.

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

Preferable, described accidental access response also comprises the described uplink scheduling permission UL grant signaling that has sent the sub-district correspondence of exclusive preamble sequence.

UE is in the described sub-district correspondence that has sent exclusive preamble sequence, is used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, detects the PDCCH of described RA-RNTI scrambling.

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, the sub-district and the described sub-district that has sent exclusive preamble sequence that are used to transmit the dispatch of the described sub-district correspondence that has sent exclusive preamble sequence are same sub-district.Then, detect the PDCCH of described RA-RNTI scrambling in the dedicated search space of the described UE of described UE on the described sub-district that has sent exclusive preamble sequence, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling.For example, UE has sent exclusive preamble sequence on sub-district 1, and the dispatch of sub-district 1 just sends on sub-district 1, and then UE detects the PDCCH of RA-RNTI scrambling in the UE of sub-district 1 dedicated search space, therefrom obtains the TA of respective cell 1; The accidental access response that carries among the PDCCH of UE detected RA-RNTI scrambling on sub-district 1 is the accidental access response of sub-district 1.

When the PDCCH of described RA-RNTI scrambling adopts when striding carrier dispatching, the sub-district and the described sub-district that has sent described exclusive preamble sequence that are used to transmit the dispatch of the described sub-district correspondence that has sent exclusive preamble sequence may be different districts.Then, in the dedicated search space of the described UE of described UE on the sub-district of the described sub-district that has sent exclusive preamble sequence being striden carrier dispatching, detect the PDCCH of described RA-RNTI scrambling, the carrier wave indication indicated sub-district, territory of carrying among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling.For example, UE has sent exclusive preamble sequence in sub-district 2 and sub-district 3, the schedule information of sub-district 2 and sub-district 3 sends on sub-district 1, and then UE detects the PDCCH of RA-RNTI scrambling in the UE of sub-district 1 dedicated search space, therefrom obtains the TA of respective cell 1 and sub-district 2; Wherein, the accidental access response respective cell 2 of carrying among the PDCCH of UE detected a plurality of RA-RNTI scramblings on the sub-district still is sub-district 3, by the carrier wave indication territory indication of carrying among the PDCCH.

Need to prove, above-mentioned UE dedicated search space specifically refers to be used to transmit the sub-district of the dispatch of the described sub-district that has sent exclusive preamble sequence, has sent the part search volume of the sub-district of exclusive preamble sequence in the dedicated search space of described UE corresponding to this.

Preferably, the DCI form (format) that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that has sent the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCI format of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

If only comprise the TA order in the accidental access response that carries among the PDCCH of described RA-RNTI scrambling, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is for carrying the DCI format that bit number is not less than K, and described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders.When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.Preferable, described K=11, described A=3.For example, if described K=11, described A=3, then for FDD and TDD system: all of existing definition can be used at the DCIformat that is used to carry UL grant and DL grant of UE dedicated search space transmission, for example DCI format 0/1/1A/1B/2/2A/2B/2C/4 etc.; Promptly send the DCI format that supports under the transmission mode of sub-district of exclusive preamble sequence and can be used for transmitting accidental access response.

Perhaps, if comprise TA order and UL grant in the accidental access response that carries among the PDCCH of described RA-RNTI scrambling simultaneously, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K+L for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence, and described L is the bit number of the UL grant of the described sub-district correspondence that has sent exclusive preamble sequence.When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+L+A for the carrying bit number, described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders, described L is the bit number of the UL grant of the described sub-district correspondence that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.Preferable, described K=11, described L=20, described A=3.For example, if described K=11, described L=20, described A=3, then for TDD system (striding carrier dispatching) no matter whether adopt, available DCI format comprises: DCI format 0 (upstream bandwidth that is applicable to described sub-district is not less than 20MHz), DCI format1/1B/1D (downlink bandwidth that is applicable to described sub-district is not less than 10MHz), DCI format 1A (downlink bandwidth that is applicable to described sub-district is not less than 20MHz), DCI format 2/2A/2B/2C (the arbitrary bandwidth to described sub-district can be used), DCI format 4 (upstream bandwidth that is applicable to described sub-district is not less than 3MHz); For FDD system (striding carrier dispatching) no matter whether adopt, available DCI format comprises: DCI format 1 (downlink bandwidth that is applicable to described sub-district is not less than 10MHz), DCI format 2 (the arbitrary bandwidth to described sub-district can be used), DCI format 2A/2C (downlink bandwidth that is applicable to described sub-district is not less than 3MHz), DCI format 2B (downlink bandwidth that is applicable to described sub-district is not less than 5MHz), DCI format 4 (upstream bandwidth that is applicable to described sub-district is not less than 5MHz); Promptly sent among the DCI format that supports under the transmission mode of sub-district of exclusive preamble sequence, the DCI format that satisfies above-mentioned condition can be used for transmitting accidental access response.

Preferable, the auxilliary sub-district that sub-district that described needs in the present embodiment insert at random and/or the described sub-district that has sent exclusive preamble sequence are described UE, the random access scheme that present embodiment provides is particularly useful for auxilliary sub-district, does not also get rid of certainly to be applied in the main plot.PRACH configuration on each Scell can be identical with Pcell, also can be different.Especially, when (group) shared TA is organized as a TA in a plurality of sub-districts of definition in the system, described sub-district also can refer to pre-defined (making an appointment in UE and base station) or signaling configuration (high-level signaling or PDCCH signaling at least one sub-district that the TA group of a shared TA comprises, wherein high-level signaling can comprise Radio Resource control (RRC) signaling or medium access control (MAC) signaling) a sub-district, for the sub-district that belongs to same TA group, UE only need carry out above-mentioned random access procedure on a sub-district of pre-defined or signaling configuration, obtain the TA value, and this TA is applied to belong to all sub-districts of this TA group.

Preferable, UE described in the present embodiment only in the accidental access response receive window of in-system define (RAR window), detects the PDCCH of described RA-RNTI scrambling in the dedicated search space of described UE; If exceed RAR window, UE does not still receive the PDCCH of described RA-RNTI scrambling, and then UE can think this access failure at random, resends the exclusive preamble sequence of described sub-district.

Relative with the UE side, referring to Fig. 6, insert at the method flow of base station side as follows in the present embodiment at random:

Step 601: the base station sends to subscriber equipment (UE) and inserts configuration information at random, the exclusive random access guiding of configuration (preamble) sequence and exclusive Physical Random Access Channel (PRACH) resource of the sub-district of inserting at random for the needs of this UE.Concrete, the base station sends to UE by PDCCH order order or radio resource control RRC signaling and inserts configuration information at random, and the described configuration information that inserts at random comprises that at least configuration is to the index information of exclusive random access guiding (preamble) sequence of described UE and the index information of exclusive Physical Random Access Channel (PRACH) resource.

Step 602: described base station is given in configuration and is received the exclusive preamble sequence that described UE sends on the exclusive PRACH resource of described UE.

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

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

The base station is in the described sub-district correspondence that receives exclusive preamble sequence, is used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, 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 when striding carrier dispatching, the sub-district and the described sub-district that receives exclusive preamble sequence that are used to transmit the dispatch of the described sub-district correspondence that receives exclusive preamble sequence are same sub-district.Then, in the dedicated search space of the described UE of base station on the sub-district that receives exclusive preamble sequence, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling.For example, the base station receives exclusive preamble sequence on sub-district 1, and the dispatch of sub-district 1 just sends on sub-district 1, and then the PDCCH of RA-RNTI scrambling is transmitted in the base station in the UE of sub-district 1 dedicated search space, and the TA of respective cell 1 is sent to UE; The accidental access response that carries among the PDCCH of the RA-RNTI scrambling of transmission on sub-district 1 is the accidental access response of sub-district 1.

When the PDCCH of described RA-RNTI scrambling adopts when striding carrier dispatching, the sub-district and the described sub-district that receives exclusive preamble sequence that are used to transmit the dispatch of the described sub-district correspondence that receives exclusive preamble sequence may be different districts.Then, in the dedicated search space of the described UE of described base station on the sub-district of the described sub-district that receives exclusive preamble sequence being striden carrier dispatching, transmit the PDCCH of described RA-RNTI scrambling, the carrier wave indication indicated sub-district, territory of carrying among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling.

Preferably, the DCI form (format) that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that receives the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCI format of (UL grant) and the DCI format that is used for bearing downlink scheduling grant (DL grant).

If only comprise the TA order in the accidental access response that carries among the PDCCH of described RA-RNTI scrambling, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is for carrying the DCI format that bit number is not less than K, and described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders.When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.Preferable, described K=11, described A=3.For example, if described K=11, described A=3, then for FDD and TDD system: all of existing definition can be used at the DCIformat that is used to carry UL grant and DL grant of UE dedicated search space transmission, for example DCI format 0/1/1A/1B/2/2A/2B/2C/4 etc.; Promptly receive the DCI format that supports under the transmission mode of sub-district of exclusive preamble sequence and can be used for transmitting accidental access response.

Preferable, the auxilliary sub-district that sub-district that described needs in the present embodiment insert at random and/or the described sub-district that has sent exclusive preamble sequence are described UE, the random access scheme that present embodiment provides is particularly useful for auxilliary sub-district, does not also get rid of certainly to be applied in the main plot.PRACH configuration on each Scell can be identical with Pcell, also can be different.Especially, when (group) shared TA is organized as a TA in a plurality of sub-districts of definition in the system, described sub-district also can refer to pre-defined (making an appointment in UE and base station) or signaling configuration (high-level signaling or PDCCH signaling at least one sub-district that the TA group of a shared TA comprises, wherein high-level signaling can comprise Radio Resource control (RRC) signaling or medium access control (MAC) signaling) a sub-district, for the sub-district that belongs to same TA group, above-mentioned random access procedure only need be carried out in the base station on a sub-district of pre-defined or signaling configuration, send the TA value, this TA value can be applicable to belong to all sub-districts of this TA group.

Stride carrier dispatching and do not stride two kinds of situations of carrier dispatching owing to exist, introduce implementation procedure in detail below by two exemplary embodiments.

Referring to Fig. 7, the method flow that inserts at random when not striding carrier dispatching in the present embodiment is as follows:

Step 701: the base station sends to UE by PDCCH order or RRC signaling and inserts configuration information at random.The described configuration information that inserts at random comprises that at least configuration is to the index information of the exclusive preamble sequence of described UE and the index information of exclusive PRACH resource.

After step 702:UE receives and to insert configuration information at random, determine exclusive preamble sequence of using on the sub-district that needs insert at random and the exclusive PRACH resource that is used to send described exclusive preamble sequence according to described configuration information.

Step 703:UE sends described exclusive preamble sequence by described definite exclusive PRACH resource to the base station on the sub-district that needs insert at random.

Step 704: after the base station receives exclusive preamble sequence, determine to receive the TA value of the sub-district correspondence of described exclusive preamble sequence according to the exclusive preamble sequence of receiving.

Step 705: in the dedicated search space of the described UE of base station on the sub-district that receives exclusive preamble sequence, PDCCH by the RA-RNTI scrambling, send accidental access response to described UE, described accidental access response comprises the TA that the uplink synchronous of the sub-district that is used to receive exclusive preamble sequence is adjusted at least.The accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the described sub-district that receives the dedicated preamble sequence.When described accidental access response only comprises the TA that the uplink synchronous of the sub-district that is used to receive exclusive preamble sequence adjusts, the DCI format that PDCCH adopts is for carrying the DCI format that bit number is not less than K, and described K is the bit number that the described TA that receives the sub-district correspondence of exclusive preamble sequence orders; Perhaps, when described accidental access response also comprises the uplink scheduling permission UL grant signaling of the sub-district correspondence that receives exclusive preamble sequence, the DCI format that PDCCH adopts is not less than the DCI format of K+L for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence, and described L is the bit number of the UL grant of the described sub-district correspondence that receives exclusive preamble sequence.

Detect the PDCCH of described RA-RNTI scrambling in the dedicated search space of the described UE of step 706:UE on the described sub-district that has sent exclusive preamble sequence.The accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the described sub-district that sends the dedicated preamble sequence.

Referring to Fig. 8, the method flow that inserts at random when striding carrier dispatching in the present embodiment is as follows:

Step 801: the base station sends to UE by PDCCH order or RRC signaling and inserts configuration information at random.The described configuration information that inserts at random comprises that at least configuration is to the index information of the exclusive preamble sequence of described UE and the index information of exclusive PRACH resource.

After step 802:UE receives and to insert configuration information at random, determine exclusive preamble sequence of using on the sub-district that needs insert at random and the exclusive PRACH resource that is used to send described exclusive preamble sequence according to described configuration information.

Step 803:UE sends described exclusive preamble sequence by described definite exclusive PRACH resource to the base station on the sub-district that needs insert at random.

Step 804: after the base station receives exclusive preamble sequence, determine to receive the TA value of the sub-district correspondence of described exclusive preamble sequence according to the exclusive preamble sequence of receiving.

Step 805: the base station is in the sub-district correspondence that receives exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of this sub-district, PDCCH by the RA-RNTI scrambling, send accidental access response to described UE, described accidental access response comprises the TA that the uplink synchronous of the sub-district that is used to receive exclusive preamble sequence is adjusted at least.The carrier wave indication indicated sub-district, territory of carrying among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling.

When described accidental access response only comprises the TA that the uplink synchronous of the sub-district that is used to receive exclusive preamble sequence adjusts, the DCI format that PDCCH adopts is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.Perhaps, when described accidental access response also comprises the uplink scheduling permission UL grant signaling of the sub-district correspondence that receives exclusive preamble sequence, the DCI format that PDCCH adopts is not less than the DCI format of K+L+A for the carrying bit number, described K is the bit number that the described TA that receives the sub-district correspondence of exclusive preamble sequence orders, described L is the bit number of the ULgrant of the described sub-district correspondence that receives exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.

Step 806:UE is in the sub-district correspondence that has sent exclusive preamble sequence, and the PDCCH of described RA-RNTI scrambling is detected in the dedicated search space that is used for transmitting the described UE on the sub-district of dispatch of this sub-district.And the information that comprises of the carrier wave that carries among the PDCCH by described RA-RNTI scrambling indication territory is determined the accidental access response corresponding district of carrying among the PDCCH of described RA-RNTI scrambling.

Understood the implementation procedure that inserts at random by above description, this process mainly realizes that by UE and base station internal structure and the function to these two equipment is introduced below.

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

Receiver module 901 is used to receive the configuration information of access at random that the base station sends.Concrete, receiver module 901 receives the configuration information of access at random that the base station sends by PDCCH order (order) or Radio Resource control (RRC) signaling, and the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

Control module 902 is used for determining exclusive random access guiding preamble sequence of using on the sub-district that needs insert at random and the exclusive Physical Random Access Channel PRACH resource that is used to send described exclusive preamble sequence according to described configuration information.

Sending module 903 is used for sending described exclusive preamble sequence by described definite exclusive PRACH resource to the base station on the sub-district that needs insert at random.

Described receiver module 901 also is used for detecting the physical downlink control channel PDCCH that adopts random access radio network temporary mark RA-RNTI scrambling in the dedicated search space of described UE, obtain the described accidental access response that has sent the sub-district of exclusive preamble sequence from described PDCCH, described accidental access response comprises at least and is used for the timing advance TA that the described uplink synchronous that has sent the sub-district of exclusive preamble sequence is adjusted.

Preferable, described accidental access response also comprises described uplink scheduling permission (UL grant) signaling that has sent the sub-district correspondence of exclusive preamble sequence.

Described receiver module 901 specifically is used in the described sub-district correspondence that has sent exclusive preamble sequence, is used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, detects the PDCCH of described RA-RNTI scrambling.

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described receiver module 901 is used for the dedicated search space of the described UE on the described sub-district that has sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling.

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described receiver module 901 is used for the dedicated search space of the described UE on the sub-district of the described sub-district that has sent exclusive preamble sequence being striden carrier dispatching, detect the PDCCH of described RA-RNTI scrambling, the carrier wave indication indicated sub-district, territory of carrying among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling.

Preferably, the DCI form format that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that has sent the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCI format of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K for the carrying bit number, and described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence.When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the corresponding described sub-district that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.

Perhaps, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K+L for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence, and described L is the bit number of the UL grant of the described sub-district correspondence that has sent exclusive preamble sequence.When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+L+A for the carrying bit number, described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders, described L is the bit number of the UL grant of the described sub-district correspondence that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.

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

The auxilliary sub-district that sub-district that described needs insert at random and/or the described sub-district that has sent exclusive preamble sequence are described UE.

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

Sending module 1001 is used for sending to user equipment (UE) and inserts configuration information at random, the exclusive random access guiding of cell configuration (preamble) sequence and exclusive Physical Random Access Channel (PRACH) resource that insert at random for the needs of described UE.Concrete, sending module 1001 sends to described UE by PDCCH order (order) or Radio Resource control (RRC) signaling and inserts configuration information at random, and the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

Receiver module 1002 is used for giving the exclusive preamble sequence that receives described UE transmission on the exclusive PRACH resource of described UE in configuration.

Control module 1003 is used for determining to receive according to the exclusive preamble sequence received Timing Advance (TA) value of the sub-district correspondence of described exclusive preamble sequence.

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

Preferable, described accidental access response also comprises the corresponding described uplink scheduling permission UL grant signaling that receives the sub-district correspondence of exclusive preamble sequence.

Described sending module 1001 specifically is used in the described sub-district correspondence that receives exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, 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 when striding carrier dispatching, described sending module 1001 is used for the dedicated search space of the described UE on the sub-district that receives exclusive preamble sequence, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling.

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described sending module is used for the dedicated search space of the described UE on the sub-district of the described sub-district that receives exclusive preamble sequence being striden carrier dispatching, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, the carrier wave that carries among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling indication indicated sub-district, territory.

Preferably, the DCI form format that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that receives the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCI format of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K for the carrying bit number, and described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence.When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K+L for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence, and described L is the bit number of the UL grant of the described sub-district correspondence that receives exclusive preamble sequence.

Perhaps, when carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+L+A for the carrying bit number, described K is the bit number that the described TA that receives the sub-district correspondence of exclusive preamble sequence orders, described L is the bit number of the UL grant of the described sub-district correspondence that receives exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.

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

The auxilliary sub-district that sub-district that described needs insert at random and/or the described sub-district that receives exclusive preamble sequence are described UE.

In the dedicated search space of UE, utilize Physical Downlink Control Channel (PDCCH) the transmission accidental access response of random access radio network temporary mark (RA-RNTI) scrambling in the embodiment of the invention, realized random access procedure, be particularly useful for SCell, the PDCCH of RA-RNTI scrambling is in the transmission of the dedicated search space of UE, do not increase the blind check number of times of UE to PDCCH, and need not transmit accidental access response at PDSCH, the PDCCH scheduling PDSCH that has also just avoided SCell to go up by the RA-RNTI scrambling transmits, transmit on the PDSCH of the PDCCH of RA-RNTI scrambling scheduling with accidental access response and to compare, saved the expense of downlink data transmission to a certain extent.The embodiment of the invention also provides the solution of striding carrier dispatching and not striding carrier dispatching.

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

The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. a method that inserts at random is characterized in that, may further comprise the steps:

2. the method for claim 1, it is characterized in that, described UE receives the configuration information of access at random that the base station sends and comprises: described UE receives the configuration information of access at random that described base station sends by PDCCH order order or radio resource control RRC signaling, and the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

3. the method for claim 1 is characterized in that, described accidental access response also comprises the described uplink scheduling permission UL grant signaling that has sent the sub-district correspondence of exclusive preamble sequence.

4. as claim 1 or 3 described methods, it is characterized in that described UE detects the PDCCH that adopts the RA-RNTI scrambling in the dedicated search space of described UE, comprising:

Described UE is in the described sub-district correspondence that has sent exclusive preamble sequence, is used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, detects the PDCCH of described RA-RNTI scrambling.

5. method as claimed in claim 4, it is characterized in that, described UE is in the described sub-district correspondence that has sent exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, detect the PDCCH of described RA-RNTI scrambling, specifically comprise: when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, in the dedicated search space of the described UE of described UE on the described sub-district that has sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling;

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, in the dedicated search space of the described UE of described UE on the sub-district of the described sub-district that has sent exclusive preamble sequence being striden carrier dispatching, detect the PDCCH of described RA-RNTI scrambling, the carrier wave indication indicated sub-district, territory of carrying among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling.

6. as claim 3,4 or 5 described methods, it is characterized in that, the DCI form format that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that has sent the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCIformat of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

7. method as claimed in claim 6, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is for carrying the DCI format that bit number is not less than K, and described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders; Perhaps,

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K+L for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence, and described L is the bit number of the UL grant of the described sub-district correspondence that has sent exclusive preamble sequence; Perhaps,

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling; Perhaps,

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+L+A for the carrying bit number, described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders, described L is the bit number of the UL grant of the described sub-district correspondence that has sent exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.

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

9. method as claimed in claim 7 is characterized in that, described L=20.

10. as each described method in the claim 1 to 9, it is characterized in that the auxilliary sub-district that sub-district that described needs insert at random and/or the described sub-district that has sent exclusive preamble sequence are described UE.

11. a method that inserts at random is characterized in that, may further comprise the steps:

12. method as claimed in claim 11, it is characterized in that, the base station sends the step insert configuration information at random to user equipment (UE) and comprises: described base station sends to described UE by PDCCH order order or radio resource control RRC signaling and inserts configuration information at random, and the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

13. method as claimed in claim 11 is characterized in that, described accidental access response also comprises the described uplink scheduling permission UL grant signaling that receives the sub-district correspondence of exclusive preamble sequence.

14. as claim 11 or 13 described methods, it is characterized in that, described base station is in the dedicated search space of described UE, and by the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, the step that sends accidental access response to described UE comprises:

Described base station is in the described sub-district correspondence that receives exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE.

15. method as claimed in claim 14, it is characterized in that, described base station is in the described sub-district correspondence that receives exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, specifically comprise:

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, in the dedicated search space of the described UE of described base station on the described sub-district that receives exclusive preamble sequence, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling;

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, in the dedicated search space of the described UE of described base station on the sub-district of the described sub-district that receives exclusive preamble sequence being striden carrier dispatching, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, the carrier wave that carries among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling indication indicated sub-district, territory.

16. as claim 13,14 or 15 described methods, it is characterized in that, the DCI form format that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that receives the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCIformat of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

17. method as claimed in claim 16, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is for carrying the DCIformat that bit number is not less than K, and described K is the bit number that the described TA that receives the sub-district correspondence of exclusive preamble sequence orders; Perhaps,

When the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is not less than the DCI format of K+L for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence, and described L is the bit number of the UL grant of the described sub-district correspondence that receives exclusive preamble sequence; Perhaps,

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+A for the carrying bit number, described K is the bit number of the TA order of the described sub-district correspondence that receives exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling; Perhaps,

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described DCI format is not less than the DCI format of K+L+A for the carrying bit number, described K is the bit number that the described TA that receives the sub-district correspondence of exclusive preamble sequence orders, described L is the bit number of the UL grant of the described sub-district correspondence that receives exclusive preamble sequence, and described A is the bit number in the carrier wave indication territory among the PDCCH of described RA-RNTI scrambling.

18. method as claimed in claim 17 is characterized in that, described K=11.

19. method as claimed in claim 17 is characterized in that, described L=20.

20., it is characterized in that the auxilliary sub-district that sub-district that described needs insert at random and/or the described sub-district that receives exclusive preamble sequence are described UE as each described method in the claim 11 to 19.

21. a user equipment (UE) is characterized in that, comprising:

22. subscriber equipment as claimed in claim 21, it is characterized in that, described receiver module is used for, receive the configuration information of access at random that described base station sends by PDCCH order order or radio resource control RRC signaling, the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

23. subscriber equipment as claimed in claim 21 is characterized in that, described accidental access response also comprises the described uplink scheduling permission UL grant signaling that has sent the sub-district correspondence of exclusive preamble sequence.

24. as claim 21 or 23 described subscriber equipmenies, it is characterized in that, described receiver module is used for, in the described sub-district correspondence that has sent exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, detect the PDCCH of described RA-RNTI scrambling.

25. subscriber equipment as claimed in claim 24, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described receiver module is used for the dedicated search space of the described UE on the described sub-district that has sent exclusive preamble sequence, detect the PDCCH of described RA-RNTI scrambling, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling;

When carrier dispatching is striden in the PDCCH of described RA-RNTI scrambling employing, described receiver module is used for the dedicated search space of the described UE on the sub-district of the described sub-district that has sent exclusive preamble sequence being striden carrier dispatching, detect the PDCCH of described RA-RNTI scrambling, the carrier wave indication indicated sub-district, territory of carrying among the PDCCH of the accidental access response that carries among the PDCCH of described RA-RNTI scrambling corresponding to described RA-RNTI scrambling.

26. as claim 23,24 or 25 described subscriber equipmenies, it is characterized in that, the DCI form format that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that has sent the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCIformat of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

27. subscriber equipment as claimed in claim 26, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is for carrying the DCI format that bit number is not less than K, and described K is the bit number that the described TA that has sent the sub-district correspondence of exclusive preamble sequence orders; Perhaps,

28. subscriber equipment as claimed in claim 27 is characterized in that, described K=11.

29. subscriber equipment as claimed in claim 27 is characterized in that, described L=20.

30., it is characterized in that the auxilliary sub-district that sub-district that described needs insert at random and/or the described sub-district that has sent exclusive preamble sequence are described UE as each described subscriber equipment in the claim 21 to 29.

31. a base station is characterized in that, comprising:

32. base station as claimed in claim 31, it is characterized in that, described sending module is used for, send to described UE by PDCCH order order or radio resource control RRC signaling and to insert configuration information at random, the described configuration information that inserts at random comprises that at least configuration gives the index information of exclusive preamble sequence of the sub-district that the needs of described UE insert at random and the index information of exclusive PRACH resource.

33. base station as claimed in claim 31 is characterized in that, described accidental access response also comprises the described uplink scheduling permission UL grant signaling that receives the sub-district correspondence of exclusive preamble sequence.

34. as claim 31 or 33 described base stations, it is characterized in that, described sending module is used for, in the described sub-district correspondence that receives exclusive preamble sequence, be used for transmitting the dedicated search space of the described UE on the sub-district of dispatch of described sub-district, by the PDCCH of described RA-RNTI scrambling, send accidental access response to described UE.

35. base station as claimed in claim 34, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described sending module is used for the dedicated search space of the described UE on the described sub-district that receives exclusive preamble sequence, PDCCH by described RA-RNTI scrambling, send accidental access response to described UE, the accidental access response that carries among the PDCCH of described RA-RNTI scrambling is corresponding to the sub-district at the PDCCH transmission place of described RA-RNTI scrambling;

36. as claim 33,34 or 35 described base stations, it is characterized in that, the DCI form format that the PDCCH of described RA-RNTI scrambling adopts the described transmission mode that receives the sub-district of exclusive preamble sequence to support, described DCI format comprise that being used to carry uplink scheduling permits the DCIformat of UL grant and the DCI format that is used for bearing downlink scheduling grant DL grant.

37. base station as claimed in claim 36, it is characterized in that, when the PDCCH of described RA-RNTI scrambling does not adopt when striding carrier dispatching, described DCI format is for carrying the DCIformat that bit number is not less than K, and described K is the bit number that the described TA that receives the sub-district correspondence of exclusive preamble sequence orders; Perhaps,

38. base station as claimed in claim 37 is characterized in that, described K=11.

39. base station as claimed in claim 37 is characterized in that, described L=20.

40., it is characterized in that the auxilliary sub-district that sub-district that described needs insert at random and/or the described sub-district that receives exclusive preamble sequence are described UE as each described base station in the claim 31 to 39.