CN102325382A

CN102325382A - Random access method and equipment

Info

Publication number: CN102325382A
Application number: CN201110183346A
Authority: CN
Inventors: 高雪娟; 林亚男; 赵锐; 潘学明
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-06-30
Filing date: 2011-06-30
Publication date: 2012-01-18
Anticipated expiration: 2031-06-30
Also published as: CN102325382B

Abstract

The embodiment of the invention discloses a random access method and equipment, relating to the technical field of radio communication and being used for solving the problem of random access way in a carrier aggregation system. In the invention, the method comprises the following steps of: sending a random access leader sequence to a base station by a terminal through a PRACH (Physical Random Access Channel) resource on a cell; confirming a random access radio network temporary identification (RA-RNTI) corresponding to the random access leader sequence according to the carrier identification information of the cell and the information of the PRACH resource, and detecting a physical downlink control channel (PDCCH) scrambled by using the RA-RNTI in a public searching space of a main cell; and receiving a physical downlink sharing channel (PDSCH) bearing a random access response corresponding to the random access leader sequence according to the detected PDCCH, and carrying out uplink synchronization adjustment on the cell according to an uplink timing advance (TA) in the random access response. By adopting the random access method and equipment, random access in an auxiliary cell or simultaneous random access in multiple cells in the carrier aggregation system is realized.

Description

Accidental access method and equipment

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of accidental access method and equipment.

Background technology

Random access procedure (Random access procedure) is divided into that competition inserts at random and non-competingly inserts at random, is used to set up the uplink synchronous of terminal (UE, User Equipment) and base station.

Competition inserts the media access control layer (MAC by UE at random; Medium Access Control) triggers; The random access leader sequence (preamble) that UE sends can be in specific preamble sequence set, to select at random; Sending the employed Physical Random Access Channel of preamble (PRACH, Physical Random Access Channel) resource also can be a resource of in specific a plurality of resources, selecting at random, therefore; When a plurality of UE have selected identical PRACH resource and preamble sequence simultaneously, there is competition.The triggering reason that competition inserts at random comprises: Radio Resource control (RRC; RadioResource Control) (promptly initial the access)/RRC rebuilds, up link (UL to connect foundation; Uplink) data arrives but UL step-out, do not dispose exclusive dispatch request (D-SR; Dedicated-SchedulingRequest) resource, D-SR reach maximum transmission times still fail (RA-SR, Random access-Scheduling Request).

Non-competing access at random; Physical downlink control channel commands (PDCCH order by the base station transmission; Physical Downlink Control Channel order) or the RRC signaling trigger; And distribute dedicated preamble and PRACH resource, and therefore there is not competition, it triggers reason and comprises: UE has down link (DL; Downlink) but data arrives UL step-out, sub-district are switched, the UL data volume increases, need the Timing Advance (TA, Time Alignment) of newly-increased sub-district and newly-increased sub-district and synchronous sub-district different, need the location.

In Long Term Evolution (LTE, Long Term Evolution) 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 Physical Resource Block (PRB), i.e. 72 number of sub-carrier on frequency domain.For FDD (FDD, Frequency Division Duplex) system, a PRACH is arranged at the most in the sub-frame; For time division duplex (TDD, Time Division Duplex) system, there are 6 PRACH to carry out frequency division multiplexing in the sub-frame at most.Transmission density and random access leader sequence form (preambleformat) according to PRACH; FDD system definition 64 kinds of PRACH configurations; By the employed PRACH configuration of high-level signaling notice UE; Thereby can confirm preamble format that UE sends and the subframe that can send PRACH, as shown in table 2.The TDD system has also defined 58 kinds of PRACH configurations; By the employed PRACH configuration of high-level signaling notice UE; Shown in table 3 and 4; Wherein table 3 has provided different preambleformat and different PRACH and has sent the combination between the density, is in the table 3 the available PRACH resource in every kind of preambleformat and the next radio frames of the combination of sending density shown in the table 4, by

The concrete physical resource position of the vector representation PRACH mapping of four parameter compositions, wherein f _RABe the frequency domain resource index, Be the radio frames index, expression PRACH will appear in the radio frames of each or even number or odd number,

Be the field index, expression PRACH is arranged in the preceding field or the back field of radio frames,

Be the sub-frame of uplink index, the starting point of indication Preamble begins to count by 0, owing to the PRACH one among the Format4 is positioned in the special time slot (UpPTS), therefore under this configuration

With (*) expression.Because the configuration one of ascending-descending subframes has 7 kinds in the TDD system frame structure, therefore can be used under the different uplink-downlink configuration, sent the concrete time-frequency domain resources position difference of PRACH.

Table 1

Table 2

Table 3

Table 4

Shown in Figure 1 is non-competing random access procedure, shown in Figure 2 for competing random access procedure.Wherein:

Message 0 (Msg0): the competition that is only applicable to non-competing access at random or base station triggers inserts at random; The content of carrying comprises at least:

Ra-PreambleIndex (Random Access Preamble): indication dedicated preamble numbering;

Ra-PRACH-MaskIndex (PRACH Mask Index): indication PRACH resource number, i.e. in a plurality of PRACH resources in dial gauge 2 or the table 4;

Message 1 (Msg1): to non-competing insert at random and compete at random to insert all be suitable for; Send the process of preamble to the base station through PRACH for UE;

Insert at random for non-competing, preamble sequence and PRACH resource all are that UE is exclusive, in Msg0, dispose; Therefore there is not competition;

Insert at random for competition, the preamble sequence is that UE is according to self being configured in a sequence of selecting at random in definite preamble group; For the FDD system, UE disposes according to PRACH, in a plurality of shown in the table 2 can send the subframe of PRACH, selects first available PRACH resource that PRACH resource subframe is arranged, and is used for sending preamble; For the TDD system, UE disposes according to PRACH, in a plurality of PRACH time-frequency domain resources shown in the table 4, begins from first available subframe that the PRACH resource is arranged, and in the PRACH of continuous three sub-frame resource, selects at random one (equiprobability); Therefore, when different UEs has been selected identical PRACH resource and preamble sequence, there is competition;

Message 2 (Msg2): to non-competing insert at random and compete at random to insert all be suitable for, do not support to mix automatic request retransmission (HARQ, Hybrid Automatic Repeat Request), promptly do not have re-transmission; UE receives the accidental access response (RAR, Random Access Response) that send the base station; This RAR is through random access radio network temporary mark (RA-RNTI; Random Access-Radio NetworkTemporary Identifier) PDCCH of scrambling scheduling; And at Physical Downlink Shared Channel (PDSCH; Physical Downlink Shared Channel) goes up transmission; The RAR that can comprise a plurality of UE among this PDSCH comprises TA adjusted value and the uplink scheduling signaling (UL grant) that is used for dispatching uplink transmission (competition is inserted at random, promptly dispatch message 3 (Msg3) transmission of this UE) among the RAR of each UE;

The UE that has sent preamble needs to monitor in the RAR receiver window of in-system define the PDCCH of RA-RNTI scrambling, if detect, and comprises the preamble sign of its transmission among this RAR, and then UE thinks that RAR receives successfully, and uses the TA that carries among this RAR; Otherwise, think that RAR takes defeat, initiate again after time-delay a period of time to insert at random;

If non-competing access at random thinks then and inserts at random successfully that random access procedure finishes;

If competition inserts at random, then temporarily can not think the random access procedure success because possibly there be competition, needs further to send Msg3;

RA-RNTI is corresponding 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 corresponding subframe of PRACH resource, and value is 0≤t_id＜10; F_id is that the PRACH resource is in the numbering of frequency domain in the sub-frame, and according to frequency domain ascending order numbering, value is 0≤f_id＜6;

Message 3 (Msg3): only access is suitable at random to competition, supports HARQ, promptly allows to retransmit; UE transmits Msg3 according to the UL grant among the RAR among the Msg2 on the frequency domain resource of corresponding Physical Uplink Shared Channel (PUSCH, Physicaluplink Shared Channel); For initial access, promptly RRC connects foundation/RRC reconstruction, comprises wireless resource control connection request (RRCConnection Request) and terminal Non-Access Stratum sign (UE NAS identifier) that rrc layer generates among the Msg3; To other situation,, comprise the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI, Cell-Radio Network Temporary Identifier) of UE among the Msg3 at least like up step-out;

Before reaching the Msg3 maximum transmission times; If the base station can not receive Msg3, can not carry out the HARQ feedback so, UE acquiescence HARQ is fed back to negative response (NACK); Can carry out sync retransmission automatically; When Msg3 reaches also success of maximum retransmission, UE can find access failure at random so, and time-delay is initiated competition a period of time once more and inserted at random.

Message 4 (Msg4): only competition insert is suitable at random, supports HARQ mechanism, the UE that only in Msg4, detects self UE sign just can carry out the HARQ feedback.Msg4 is through the PDCCH scheduling, in the PDSCH channel; Trigger former because RRC connects the situation that foundation/RRC rebuilds for inserting at random; This PDCCH uses interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (TC-RNTI; TemporaryCell-Radio Network Temporary Identifier) scrambling; For other scene, this PDCCH uses the C-RNTI scrambling;

If Msg3 comprises the C-RNTI of UE, it is any following two kinds of situation then to occur, thinks competition success:

The first, PRACH is that the MAC oneself of UE triggers, and the PDCCH of scheduling Msg4 is based on this C-RNTI addressing, and comprises the UL grant to new transfer;

The second, PRACH is a base station triggers, but the RACH of competition, and the PDCCH of scheduling Msg4 is based on this C-RNTI addressing.

Trigger former to rebuild if insert at random because RRC connects foundation/RRC; And the PDCCH of scheduling Msg4 is based on the TC-RNTI addressing; Solve identification medium access control cell (UE Contention Resolution Identity MAC CE) if comprise terminal challenge among the Msg4; And CCCH service data unit (CCCHSDU) is consistent among the UEcontention Resolution Identity among this MAC CE and the Msg3; Then think competition success, and TC-RNTI is upgraded to C-RNTI; Otherwise think and compete failure.

For long-term evolution upgrading (Long Term Evolution Advanced; LTE-A) system, for supporting the system bandwidth wideer than LTE system, can be with distributing to some spectrum aggregatings of existing systems; Gather into big bandwidth and supply with long-term evolution multi-carrier system use, i.e. carrier aggregation technology.The up-downgoing carrier wave can asymmetricly dispose in this moment system, and promptly the user may take N1 >=1 carrier wave and carries out downlink transfer, and N2 >=1 carrier wave carries out uplink, and is as shown in Figure 3.

Carrier aggregation (the CA of LTE-A version 10 (Rel-10); Carrier Aggregation) in the system; Up direction is only supported continuous carrier aggregation, and each UE by main plot of base station assigns (Primarycell, Pcell); A cell 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.Support among the LTE-ARel-10 that the access at random of the UE of CA occurs over just on the Pcell.Different with LTE-A Rel-10 system; LTE-A version 11 (Rel-11) system need support more complicated carrier aggregation scene; Comprise the carrier aggregation of up different frequency range and the carrier aggregation deployment scheme of macro base station (Macro eNB) and long distance wireless head (RRH, Remote Radio Head) mixing.Wherein the example of the carrier aggregation deployment scheme of macro base station and RRH mixing is shown in Fig. 4 A and Fig. 4 B.

For Fig. 4 A, 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 B, 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 of different frequency range is different, 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 shown in Fig. 4 A and Fig. 4 B,, and carried out the carrier aggregation of F1 and F2 if UE is in Macro and the common geographic area that covers of RRH; Then because F1 is the use of Macro base station; F2 is that RRH uses, and then the signal on two frequencies is through different propagation paths, causes the time of the signal arrival base station that UE sends on F1 and F2 simultaneously difference to occur.

Therefore, in the carrier aggregation of different frequency range, or in the carrier aggregation deployment scenario of macro base station and RRH mixing, also need carry out the TA adjustment on the auxilliary sub-district (Scell, Secondary cell), to guarantee the uplink synchronous of Scell and base station through inserting at random.During standardization is at present discussed, how to carry out access at random and a plurality of cell on the Scell in the carrier aggregation system and insert at random simultaneously and also do not have concrete implementation.

Summary of the invention

The embodiment of the invention provides a kind of accidental access method and equipment, is used for solving inserting at random and problem that a plurality of cell inserts simultaneously at random on the carrier aggregation system Scell.

Accidental access method in a kind of carrier aggregation system, this method comprises:

The terminal is confirmed the random access guiding preamble sequence that need on the sub-district that current subframe inserts at random, send and is sent the Physical Random Access Channel PRACH resource that random access leader sequence uses; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource;

The terminal is according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that sends on the said sub-district, use the physical downlink control channel PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

The terminal is according to detected said PDCCH; Reception carries the Physical Downlink Shared Channel PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up timing advance TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

The terminal is according to the information of sending the employed said PRACH resource of said random access leader sequence on the said sub-district; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that sends on the said sub-district, use the physical downlink control channel PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

The terminal is according to the indicated carrier identification information in the indication territory of the carrier identification among the detected said PDCCH; Reception carries the Physical Downlink Shared Channel PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up timing advance TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

Random access processing method in a kind of carrier aggregation system, this method comprises:

The base station random access guiding preamble sequence that receiving terminal sends on the Physical Random Access Channel PRACH of sub-district resource;

The base station is according to the information of the PRACH resource of the said random access leader sequence of transmission on carrier identification information and the said sub-district of the sub-district that receives random access leader sequence; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that receives on the said sub-district; Send the physical downlink control channel PDCCH of using this RA-RNTI scrambling in the common search space of setting the sub-district, receive with dispatch terminal and carry the Physical Downlink Shared Channel PDSCH that the random access leader sequence corresponding random inserts response;

The PDSCH that carries said accidental access response is sent to the terminal in the base station, comprises up timing advance TA in the said accidental access response.

The base station is according to the information of the PRACH resource of the said random access leader sequence of transmission on the sub-district that receives random access leader sequence; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that receives on the said sub-district; Send the PDCCH that carries carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of setting the sub-district, receive the PDSCH of the accidental access response that carries random access leader sequence with dispatch terminal; Said carrier identification indication territory indication receives the carrier identification information of the said sub-district of random access leader sequence;

A kind of terminal, this terminal comprises:

Transmitting element is used for confirming the random access guiding preamble sequence that need on the sub-district that current subframe inserts at random, send and sends the Physical Random Access Channel PRACH resource that random access leader sequence uses; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource;

Detecting unit; Be used for according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that sends on the said sub-district, use the physical downlink control channel PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

Lock unit; Be used for according to detected said PDCCH; Reception carries the Physical Downlink Shared Channel PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up timing advance TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

A kind of terminal, this terminal comprises:

Detecting unit; Be used for according to the information of sending the employed said PRACH resource of said random access leader sequence on the said sub-district; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that sends on the said sub-district, use the physical downlink control channel PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

Lock unit; Be used for the indicated carrier identification information in carrier identification indication territory according to detected said PDCCH; Reception carries the Physical Downlink Shared Channel PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up timing advance TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

A kind of base station, this base station comprises:

Receiving element is used for the random access guiding preamble sequence that receiving terminal sends on the Physical Random Access Channel PRACH of sub-district resource;

Scheduling unit; Be used for information according to the PRACH resource of the said random access leader sequence of transmission on carrier identification information and the said sub-district of the sub-district that receives random access leader sequence; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that receives on the said sub-district; Send the physical downlink control channel PDCCH of using this RA-RNTI scrambling in the common search space of setting the sub-district, receive with dispatch terminal and carry the Physical Downlink Shared Channel PDSCH that the random access leader sequence corresponding random inserts response;

Transmitting element is used for sending the PDSCH that carries said accidental access response to the terminal, comprises up timing advance TA in the said accidental access response.

A kind of base station, this base station comprises:

Scheduling unit; Be used for information according to the PRACH resource of the said random access leader sequence of transmission on the sub-district that receives random access leader sequence; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that receives on the said sub-district; Send the PDCCH that carries carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of setting the sub-district, receive the PDSCH of the accidental access response that carries random access leader sequence with dispatch terminal; Said carrier identification indication territory indication receives the carrier identification information of the said sub-district of random access leader sequence;

In a kind of scheme that the embodiment of the invention provides; Definite the inserting the preamble sequence at random and sending the PRACH resource that random access leader sequence uses of need on the sub-district that current subframe inserts at random, sending in terminal; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource; Then according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to send on the said sub-district; Use the PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal; According to detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.It is thus clear that, adopt this method, can realize in the carrier aggregation system end side in auxilliary sub-district perhaps a plurality of sub-districts insert at random simultaneously.

Accordingly; The base station preamble of the access at random sequence that receiving terminal sends on the PRACH of sub-district resource; Information according to the PRACH resource of the said random access leader sequence of transmission on the carrier identification information of the sub-district that receives random access leader sequence and the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to receive on the said sub-district; Send the PDCCH that uses this RA-RNTI scrambling in the common search space of setting the sub-district; Receive the PDSCH that carries random access leader sequence corresponding random access response with dispatch terminal, and send the PDSCH that carries said accidental access response, comprise up TA in the said accidental access response to the terminal.Thus it is clear that, adopt this method, base station side can realize that auxilliary sub-district or a plurality of sub-districts in the carrier aggregation system insert simultaneously at random.

In the another kind of scheme that the embodiment of the invention provides; Definite the inserting the preamble sequence at random and sending the PRACH resource that random access leader sequence uses of need on the sub-district that current subframe inserts at random, sending in terminal; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource; Then according to the information of sending the employed said PRACH resource of said random access leader sequence on the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to send on the said sub-district uses the PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal; According to the indicated carrier identification information in the indication territory of the carrier identification among the detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.It is thus clear that, adopt this method, can realize in the carrier aggregation system end side in auxilliary sub-district perhaps a plurality of sub-districts insert at random simultaneously.

Accordingly; The base station preamble of the access at random sequence that receiving terminal sends on the PRACH of sub-district resource; Information according to the PRACH resource of the said random access leader sequence of transmission on the sub-district that receives random access leader sequence; The corresponding RA-RNTI of said random access leader sequence that confirms to receive on the said sub-district; Send the PDCCH that carries carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of setting the sub-district, receive the PDSCH of the accidental access response that carries random access leader sequence with dispatch terminal; Said carrier identification indication territory indication receives the carrier identification information of the said sub-district of random access leader sequence; The PDSCH that carries said accidental access response is sent to the terminal in the base station then, comprises up TA in the said accidental access response.It is thus clear that, adopting this method, base station side can realize that auxilliary sub-district is perhaps inserted a plurality of sub-districts simultaneously at random in the carrier aggregation system.

Description of drawings

Fig. 1 is the non-competing figure of access process at random of the prior art;

Fig. 2 is competition of the prior art access process figure at random;

Fig. 3 is a spectrum aggregating system schematic of the prior art;

Fig. 4 A is the scene sketch map of macro base station of the prior art and RRH mixed deployment;

Fig. 4 B is the scene sketch map of another macro base station of the prior art and RRH mixed deployment;

The end side method flow sketch map that Fig. 5 provides for the embodiment of the invention;

The base station side method flow sketch map that Fig. 6 provides for the embodiment of the invention;

Another end side method flow sketch map that Fig. 7 provides for the embodiment of the invention;

Another base station side method flow sketch map that Fig. 8 provides for the embodiment of the invention;

The terminal structure sketch map that Fig. 9 provides for the embodiment of the invention;

The architecture of base station sketch map that Figure 10 provides for the embodiment of the invention.

Embodiment

In order to solve terminal in the carrier aggregation system how in auxilliary sub-district or the problem that inserts at random in a plurality of sub-districts simultaneously, the embodiment of the invention provides accidental access method and the random access processing method of respective base station side in a kind of carrier aggregation system of counterpart terminal side.

Referring to Fig. 5, the accidental access method in the carrier aggregation system that the embodiment of the invention provides may further comprise the steps:

Step 50: definite the inserting the preamble sequence at random and sending the PRACH resource that random access leader sequence uses of need on the sub-district that current subframe inserts at random, sending in terminal; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource;

Step 51: the terminal is according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to send on the said sub-district uses the PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

Step 52: the terminal is according to detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

Further, confirming at the terminal in the step 50 need be before the PRACH resource of random access leader sequence that sends on the sub-district that current subframe inserts at random and the use of transmission random access leader sequence; The terminal receives special-purpose random access leader sequence numbering and the PRACH resource number that send through PDCCH order or Radio Resource control (RRC) signaling the base station; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in said sub-district that need insert at random; Said PRACH resource number is used to indicate the said sub-district that need insert at random to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.The random access leader sequence of said special-purpose random access leader sequence numbering indication then on the PRACH resource of said PRACH resource number indication, is sent in the terminal in the step 50 to the base station.

Concrete, said terminal can receive said PDCCH order on the auxilliary sub-district or main plot at said terminal; Do not adopt when striding carrier dispatching when said PDCCH order, corresponding the non-competing of sub-district that triggers said PDCCH command transfer place inserted at random in the PDCCH order that said terminal receives; When carrier dispatching was striden in said PDCCH order employing, the corresponding carrier wave that triggers in the said PDCCH order of the PDCCH order that said terminal receives indicated the non-competing of indicated sub-district, territory to insert at random.

In the step 51, the corresponding RA-RNTI of said random access leader sequence that said terminal can be confirmed to send on the said sub-district according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

T_id is the numbering of first corresponding subframe of said PRACH resource, 0≤t_id＜10; F_id is the numbering of the interior PRACH resource of a sub-frame at frequency domain, 0≤f_id＜6; Cell_sign is the carrier identification information of said sub-district, and 0≤cell_sign＜N, N are the maximum carrier number in the system.

Concrete; Said carrier identification information is: the carrier index (cell_index) that safeguard at the terminal; Or the system-level numbering (i.e. the unique numbering in system scope of said sub-district is given in definition) that said sub-district is given in definition in the system, or in the set of cells of corresponding same main plot definition give a main plot level of said sub-district numbering (i.e. definition give said sub-district, with the corresponding set of cells scope in the main plot at said terminal in a unique numbering).

More excellent; When the random access procedure of said sub-district is non-competing when inserting at random; Said carrier identification information can be the carrier index (cell_index) of terminal maintenance; Or the system-level numbering that said sub-district is given in definition in the system, or define numbering in the set of cells of corresponding same main plot to a main plot level of said sub-district; When the random access procedure of said sub-district inserted for competition at random, said carrier identification information was the system-level numbering that said sub-district is given in definition in the system.

When said carrier identification information was the carrier index of terminal maintenance, terminal described in the step 52 received said PDSCH in the main plot at said terminal.In other cases, said terminal receives said PDSCH on the sub-district of the main plot at said terminal or said transmission random access leader sequence, and specifically which sub-district receiving said PDSCH in can make an appointment.

In this method, said sub-district is the auxilliary sub-district at said terminal, can certainly be the main plot.Special, when a plurality of sub-districts of definition in the system during as one group of shared TA, said sub-district also can refer to a sub-district of definition/configuration in advance in the cell set of a shared TA.

Referring to Fig. 6, the embodiment of the invention also provides the random access processing method in a kind of carrier aggregation system, may further comprise the steps:

Step 60: the base station preamble of the access at random sequence that receiving terminal sends on the PRACH of sub-district resource;

Step 61: the base station is according to the information of the PRACH resource of the said random access leader sequence of transmission on carrier identification information and the said sub-district of the sub-district that receives random access leader sequence; The corresponding RA-RNTI of said random access leader sequence that confirms to receive on the said sub-district; Send the PDCCH that uses this RA-RNTI scrambling in the common search space of setting the sub-district, receive with dispatch terminal and carry the PDSCH that the random access leader sequence corresponding random inserts response;

Step 62: the PDSCH that carries said accidental access response is sent to the terminal in the base station, comprises up TA in the said accidental access response.

Further; In the step 60 in the base station before the random access leader sequence that receiving terminal on the PRACH of the sub-district resource sends; The base station can be through PDCCH order or RRC signaling; Send special-purpose random access leader sequence numbering and PRACH resource number to the terminal; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in the sub-district that need insert at random, said PRACH resource number to be used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.The base station then can be only carries out receiving the random access leader sequence of said special-purpose random access leader sequence numbering indication on the PRACH resource of the said PRACH resource number indication on the non-competing sub-district of inserting at random having disposed the terminal in the step 60.

Concrete, said PDCCH order is sent in the base station on the auxilliary sub-district or main plot at the terminal that needs insert at random; Do not adopt when striding carrier dispatching when said PDCCH order, corresponding the non-competing of sub-district that triggers the said PDCCH order of transmission inserted at random in the said PDCCH order that send said base station; When said PDCCH ordered employing to stride carrier dispatching, indicated the non-competing of sub-district in carrier wave indication territory during the said PDCCH of the corresponding triggering of said PDCCH order that send said base station orders inserted at random.

In the step 61, the PDCCH that uses said RA-RNTI scrambling is sent in the common search space of setting the sub-district in said base station, and its concrete realization can be following:

Adopt non-competingly when inserting at random when said base station configuration terminal, the PDCCH that uses said RA-RNTI scrambling is sent in said base station in the common search space that is disposing the main plot of adopting the non-competing terminal of inserting at random; Perhaps,

When said base station configurating terminal adopt not non-competingly when inserting at random, the PDCCH that uses said RA-RNTI scrambling is sent in the common search space of all sub-districts in said base station.

In the step 61, the corresponding RA-RNTI of random access leader sequence that said base station can be confirmed to receive on the said sub-district according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

In the step 62, transmit the accidental access response of the random access leader sequence of the identical RA-RNTI of correspondence on the PDSCH that PDCCH dispatched of this RA-RNTI scrambling simultaneously said base station.

Concrete, said carrier identification information is the carrier index that safeguard at the terminal, or the system-level numbering that said sub-district is given in definition in the system, or defines the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

In the step 62, be the carrier index safeguarded of terminal and insert at random to non-competing when inserting at random that in said carrier identification information said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station.

In other cases, said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station; Perhaps, said PDSCH is sent in said base station on the sub-district at the said random access leader sequence place that receives, specifically which sub-district to send said PDSCH in and can make an appointment.

In this method, said sub-district is the auxilliary sub-district at terminal, can certainly be the main plot at terminal.Special, when a plurality of sub-districts of definition in the system during as one group of shared TA, said sub-district also can refer to a sub-district of definition/configuration in advance in the cell set of a shared TA.

In order to solve terminal in the carrier aggregation system how in auxilliary sub-district or many problems that insert at random a plurality of sub-districts simultaneously, the embodiment of the invention provides accidental access method and the random access processing method of respective base station side in the carrier aggregation system of another kind of counterpart terminal side.

Referring to Fig. 7, the accidental access method in the carrier aggregation system that the embodiment of the invention provides may further comprise the steps:

Step 70: definite the inserting the preamble sequence at random and sending the PRACH resource that random access leader sequence uses of need on the sub-district that current subframe inserts at random, sending in terminal; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource;

Step 71: the terminal is according to the information of sending the employed said PRACH resource of said random access leader sequence on the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to send on the said sub-district uses the PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

Step 72: the terminal is according to the indicated carrier identification information in the indication territory of the carrier identification among the detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

Further; Confirming at the terminal in the step 70 need be before the PRACH resource of random access leader sequence that sends on the sub-district that current subframe inserts at random and the use of transmission random access leader sequence; The terminal receives special-purpose random access leader sequence numbering and the PRACH resource number that send through PDCCH order or RRC signaling the base station; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in said sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.The random access leader sequence of said special-purpose random access leader sequence numbering indication then on the PRACH resource of said PRACH resource number indication, is sent in the terminal in the step 70 to the base station.

In the step 72; The terminal is according to the indicated carrier identification information in the indication territory of the carrier identification among the detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response; Be specially: the terminal receives the said PDCCH carry with the corresponding to carrier identification information of carrier identification information of the sub-district of said transmission random access leader sequence; The PDSCH that is dispatched, and then the said random access leader sequence corresponding random that obtains to send said sub-district from this PDSCH inserts response.

Concrete, said carrier identification information is the carrier index that safeguard at the terminal, or the system-level numbering that said sub-district is given in definition in the system, or defines the numbering of a main plot level of giving said sub-district in the corresponding set of cells in corresponding same main plot.

When said carrier identification information was the carrier index of terminal maintenance, the terminal received said PDSCH in the main plot at said terminal in the step 72.In other cases, the terminal receives said PDSCH on the sub-district of the main plot at said terminal or said transmission random access leader sequence, and specifically which sub-district receiving said PDSCH in can make an appointment.

Said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH.When said PDCCH adopts Downlink Control Information (DCI) form 1A; One or combination in any in the automatic request retransmission of reusable mixing (HARQ) process number indication territory, redundancy versions indication territory, the descending allocation index indication territory are as the indication of the carrier identification among said PDCCH territory.

Referring to Fig. 8, the embodiment of the invention also provides the random access processing method in a kind of carrier aggregation system, may further comprise the steps:

Step 80: the base station preamble of the access at random sequence that receiving terminal sends on the PRACH of sub-district resource;

Step 81: the base station is according to the information of the PRACH resource of the said random access leader sequence of transmission on the sub-district that receives random access leader sequence; The corresponding RA-RNTI of said random access leader sequence that confirms to receive on the said sub-district; Send the PDCCH that carries carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of setting the sub-district, receive the PDSCH of the accidental access response that carries random access leader sequence with dispatch terminal; Said carrier identification indication territory indication receives the carrier identification information of the said sub-district of random access leader sequence;

Step 82: the PDSCH that carries said accidental access response is sent to the terminal in the base station, comprises up TA in the said accidental access response.

Further; In step 80 base station before the random access leader sequence that receiving terminal on the PRACH of the sub-district resource sends; The base station can be through PDCCH order or RRC signaling; Send special-purpose random access leader sequence numbering and PRACH resource number to the terminal; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in the sub-district that need insert at random, said PRACH resource number to be used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.The base station then can be only carries out receiving the random access leader sequence of said special-purpose random access leader sequence numbering indication on the PRACH resource of the said PRACH resource number indication on the non-competing sub-district of inserting at random having disposed the terminal in the step 80.

In the step 81, the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling is sent in said base station in the common search space of setting the sub-district, and its concrete realization can be following:

Adopt non-competingly when inserting at random when said base station configuration terminal, the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling is sent in said base station in the common search space that is disposing the main plot of adopting the non-competing terminal of inserting at random; Perhaps,

When said base station configurating terminal adopt not non-competingly when inserting at random, the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling is sent in said base station in the common search space of all sub-districts.

In the step 82; Said base station is the accidental access response of identical RA-RNTI of correspondence and the random access leader sequence that on the sub-district with same carrier wave identification information, receives, indicates transmission simultaneously on the PDSCH that PDCCH dispatched of carrier identification information of said sub-district in carrier identification indication this RA-RNTI scrambling and that carry territory.

Be the carrier index safeguarded of terminal and insert at random to non-competing when inserting at random that in said carrier identification information said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station.In other cases, said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station; Perhaps, said PDSCH is sent in said base station on the sub-district at the random access leader sequence place that receives, specifically which sub-district to send said PDSCH in and can make an appointment.

Said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH.When said PDCCH adopted DCI form 1A, one or combination in any in the automatic request retransmission HARQ process number indication of reusable mixing territory, redundancy versions indication territory, the descending allocation index indication territory were as the indication of the carrier identification among said PDCCH territory.

Specify in the face of the present invention down:

In LTE-A CA system, when the UE polymerization during a plurality of cell, UE carries out according to following mode in the access at random on the Scell or simultaneously when a plurality of cell insert at random:

The UE end:

Step 1:UE confirms that the Scell that need insert at random goes up preamble sequence of sending and the PRACH resource that is used to send preamble, sends the preamble sequence of confirming through the PRACH channel resource of confirming on Scell;

Wherein the configuration of the PRACH on each Scell can be identical with Pcell, also can be different;

If Scell is last is non-competing access at random, then before this step, also comprises, UE receives exclusive preamble sequence and the PRACH resource that base station configuration is given UE through PDCCHorder or RRC signaling;

The PDCCH order of corresponding Scell can send on this Scell, perhaps also can send (the PDCCH UE on Pcell or other Scell sends exclusive search volume, needs configuration to stride carrier dispatching) on Pcell or other Scell;

More excellent, can't judge when receiving the preamble sequence for fear of the base station from which UE, thereby can't confirm the Pcell of this UE that the last access at random of Scell should adopt PDCCH order mode to trigger;

Step 2:UE is at the PDCCH of the RA-RNTI scrambling of the corresponding Scell accidental access response of the common search spatial detection of Pcell, and receives the PDSCH of the carrying Scell accidental access response of this PDCCH scheduling;

Wherein said PDSCH can transmit at Pcell; Also can transmit at Scell; Concrete mode can make an appointment by UE and base station (if there is carrier wave indication territory among this PDCCH, for example method 2, transmit on the carrier wave that the PDSCH that does not require this PDCCH scheduling indicates in carrier wave indication territory);

Said PDSCH can comprise a plurality of accidental access responses that on the identical PRACH resource (the time-frequency domain position is all identical) on this Scell, send the UE of preamble simultaneously; It is accidental access response transmission simultaneously in the PDSCH of the PDCCH of this RA-RNTI scrambling scheduling of the UE on the Scell of corresponding identical RA-RNTI;

Method 1:UE distinguishes the corresponding Scell of PDCCH of the RA-RNTI scrambling of sending in the Pcell common search space through the RA-RNTI relevant with carrier information;

Particularly, said carrier information can be carrier identification information (cell_sign), and promptly RA-RNTI is relevant with cell_sign; RA-RNTI=1+t_id+10*f_id+60*cell_sign for example, wherein: t_id is the numbering of first corresponding subframe of PRACH resource, value 0≤t_id＜10; F_id is the numbering of PRACH resource in the sub-frame; According to frequency domain ascending order numbering, value 0≤f_id＜6, cell_sign is the carrier identification of current Scell; Value 0≤cell_sign＜N, N are the maximum carrier number in the system;

The cell_sign of each Scell can be the exclusive carrier identification or the exclusive carrier identification of Pcell of carrier index (being that each UE safeguards independently cell_index) or system of UE maintenance; More excellent; Cell_sign is that the exclusive carrier identification of system (is the specific numbering that the sub-district is given in definition in the system; All cell in the system are unified to number) or the exclusive carrier identification (promptly with in the corresponding set of cells in same main plot defining a specific numbering of giving said sub-district, the unified numbering of the pairing Scell of the UE of all corresponding same Pcell) of Pcell; More excellent, when the random access procedure of Scell is non-competing when inserting at random, carrier identification can be exclusive carrier identification or the exclusive carrier identification of Pcell of carrier index (being that each UE safeguards independently cell_index) or system that UE safeguards; When the random access procedure of Scell inserted for competition at random, carrier identification was required to be the exclusive carrier identification of system;

When cell_sign is the carrier index that UE safeguards, require the PDSCH that carries the Scell accidental access response to send at Pcell.

For example: UE0 has been configured 2 Scell; Be respectively Scell-1 and Scell-2; UE0 simultaneously adopts identical PRACH time-frequency domain resources to send identical preamble on Scell-1 and Scell-2, and then UE0 t_id and the f_id corresponding according to the PRACH resource on the Scell-1, and the cell_sign of Scell-1 confirms the RA-RNTI-1 of the accidental access response correspondence on the Scell-1; In the common search space of Pcell, detect the PDCCH of RA-RNTI-1 scrambling; And (can on Pcell, transmit, also can on Scell, transmit, make an appointment in UE and base station to receive the PDSCH of this PDCCH scheduling; Be wherein a kind of transmission means of regulation in the standard), obtain the accidental access response of Scell-1; T_id and f_id that UE0 is corresponding according to the PRACH resource on the Scell-2; And the cell_sign of Scell-2 confirms the corresponding RA-RNTI-2 of accidental access response on the Scell-2; In the common search space of Pcell, detect the PDCCH of RA-RNTI-2 scrambling; And receive the PDSCH that this PDCCH dispatches, obtain the accidental access response of Scell-2; In the said process; On Scell-1 and Scell-2, send simultaneously among a plurality of UE of preamble sequence on the identical PRACH resource; The accidental access response of the UE of corresponding identical RA-RNTI carries in the PDSCH of the PDCCH of this RA-RNTI scrambling scheduling simultaneously; If promptly the PRACH resource of UE1 UE0 transmission preamble sequence on Scell-1 has been sent preamble sequence (preamble that is different from UE0) simultaneously; UE2 UE0 on Scell-2 sends the PRACH resource of preamble sequence and has sent preamble sequence (preamble that is different from UE0) simultaneously, then:

If the cell_sign of the Scell carrier identification exclusive or that Pcell is exclusive that is system; The carrier identification that is the Scell-1 that safeguards of UE1 is consistent with the carrier identification of the Scell-1 of UE0 maintenance; The carrier identification of the Scell-2 that UE2 safeguards is consistent with the carrier identification of the Scell-2 that UE0 safeguards; As shown in table 5; The RA-RNTI of the accidental access response correspondence on the Scell-1 that the cell_sign of the Scell-1 that then UE1 t_id and the f_id corresponding according to the PRACH resource on the Scell-1, and UE1 safeguards confirms is RA-RNTI-1 with the corresponding RA-RNTI of UE0 Scell-1; T_id and f_id that UE2 is corresponding according to the PRACH resource on the Scell-2; And the corresponding RA-RNTI of the accidental access response on the Scell-2 that confirms of the cell_sign of the Scell-2 that safeguards of UE2 is RA-RNTI-2, therefore with the corresponding RA-RNTI of UE0 Scell-2; The accidental access response of UE1 is carried among the PDSCH of PDCCH scheduling of RA-RNTI-1 scrambling equally; The accidental access response of UE2 is carried on the PDSCH of the PDCCH scheduling of RA-RNTI-2 scrambling equally, and UE1 uses RA-RNTI-1 in the common search space of Pcell, to detect PDCCH, and UE2 uses RA-RNTI-2 in the common search space of Pcell, to detect PDCCH;

	UE0	UE1	UE2
				Pcell	0	0	0
Scell-1	1√	1√	1
				Scell-2	2√	2	2√

Table 5

Wherein √ is illustrated on the identical PRACH resource and has sent preamble simultaneously.

If the cell_sign of Scell is the carrier index that UE safeguards; The numbering that is the Scell-1 that safeguards of UE1 is inconsistent with the numbering of the Scell-1 of UE0 maintenance; But the numbering of the Scell-2 that safeguards with UE0 is consistent; The numbering of the Scell-2 that the numbering of the Scell-2 that UE2 safeguards and UE0 safeguard is inconsistent; But the numbering of the Scell-1 that safeguards with UE0 is consistent, as shown in table 6, and then UE1 is according to the t_id and the f_id of the correspondence of the PRACH resource on the Scell-1; And the corresponding RA-RNTI of the accidental access response on the Scell-1 that confirms of the cell_index of the Scell-1 that safeguards of UE1 is with the corresponding RA-RNTI of UE0 Scell-2; Be RA-RNTI-2, t_id and f_id that UE2 is corresponding according to the PRACH resource on the Scell-2, and the corresponding RA-RNTI of the accidental access response on the Scell-2 that confirms of the cell_index of the Scell-2 that safeguards of UE2 is with the corresponding RA-RNTI of UE0 Scell-1; Be RA-RNTI-1; Therefore, the Scell-2 corresponding random that the Scell-1 corresponding random of UE1 inserts response and UE0 inserts among the PDSCH that responds the PDCCH scheduling that together is carried on the RA-RNTI-2 scrambling, and the Scell-2 corresponding random of UE2 inserts and responds the PDSCH that together is carried on the PDCCH scheduling of RA-RNTI-1 scrambling with the Scell-1 corresponding random access response of UE0; UE1 uses RA-RNTI-2 in the common search space of Pcell, to detect PDCCH, and UE2 uses RA-RNTI-1 in the common search space of Pcell, to detect PDCCH; Owing to carried the accidental access response that different Scell go up different UEs among the PDSCH of the PDCCH of same RA-RNTI scrambling scheduling, so this PDSCH can only transmit at Pcell;

	UE0	UE1	UE2
				Pcell	0	0	0
Scell-1	1√	2√	2
				Scell-2	2√	1	1√

Table 6

Wherein √ is illustrated on the identical PRACH resource and has sent preamble simultaneously

The corresponding Scell of PDCCH of the RA-RNTI scrambling that method 2:UE confirms through the carrier wave among the PDCCH of RA-RNTI scrambling indication territory to send in the Pcell common search space;

The PDSCH correspondence that the indicated information in carrier wave indication territory is dispatched for this PDCCH is carried the accidental access response of which Scell, and its indication information can be cell_sign;

When cell_sign is the carrier index that UE safeguards, require the PDSCH that carries the Scell accidental access response to send at Pcell;

The transmission simultaneously in the PDSCH of the carrier wave indication territory of this RA-RNTI scrambling PDCCH scheduling corresponding of the accidental access response of UE on the Scell of corresponding identical RA-RNTI and Scell sign with this Scell sign;

Original bit can or be reused for the additional bit that increases newly in carrier wave among the PDCCH of RA-RNTI scrambling indication territory;

More excellent, in order not increase blind check, the PDCCH of RA-RNTI scrambling can adopt DCI_format 1A, and this moment is reusable wherein:

HARQ process number (HARQ process number) indication territory is 3 bits for the FDD system, is 4 bits for the TDD system; And/or,

Redundancy versions (Redundancy version) indication territory all is 2 bits for FDD and TDD; And/or,

For the TDD system, descending allocation index (Downlink Assignment Index) indication territory, 2 bits;

For example: UE0 has been configured 2 Scell; Be respectively Scell-1 and Scell-2; UE0 simultaneously adopts the identical identical preamble of PRACH time-frequency domain resources transmission on Scell-1 and Scell-2; Then UE0 is according to the t_id and the f_id of the correspondence of the PRACH resource on Scell-1 and the Scell-2; Confirm the RA-RNTI that two Scell are corresponding identical, in the common search space of Pcell, detect the PDCCH of this RA-RNTI scrambling, obtain the PDCCH of 2 these RA-RNTI scramblings; Confirm that according to the indication of the carrier wave among these 2 PDCCH territory the PDSCH of each PDCCH scheduling (can transmit on Pcell again; Also can on Scell, transmit, make an appointment in UE and base station, i.e. wherein a kind of transmission means of regulation in the standard) comprise the accidental access response of which Scell: i.e. the cell_sign of the Scell-1 that the indication of carrier wave among PDCCH1 territory corresponding UE 0 is safeguarded; Therefore the accidental access response of confirming Scell-1 carries on the PDSCH of PDCCH1 scheduling, and UE0 obtains the accidental access response of Scell-1 from the PDSCH of PDCCH1 scheduling; Therefore the cell_sign of the Scell-2 that carrier wave indication territory corresponding UE 0 among the PDCCH2 is safeguarded confirms that the accidental access response of Scell-2 carries on the PDSCH of PDCCH2 scheduling, UE0 obtains the accidental access response of Scell-2 from the PDSCH of PDCCH2 scheduling; In the said process; The accidental access response that on Scell-1 and Scell-2, sends a plurality of UE of preamble sequence on the identical PRACH resource simultaneously transmits in the PDSCH of the PDCCH scheduling of the RA-RNTI scrambling in corresponding same carrier wave indication territory; If promptly UE1 has sent preamble sequence (preamble that is different from UE0) simultaneously on the PRACH resource of UE0 transmission preamble sequence on the Scell-1; UE2 has sent preamble sequence (preamble that is different from UE0) simultaneously on the PRACH resource of UE0 transmission preamble sequence on the Scell-2; UE1 uses the RA-RNTI identical with UE0 in the common search space of Pcell, to detect 2 PDCCH with UE2 is same; And according to carrier wave indication territory among each PDCCH; Obtain accidental access response sending among the PDSCH that the place consistent PDCCH of Scell numbering dispatches, be specially with self preamble:

If the cell_sign of the Scell carrier identification exclusive or that Pcell is exclusive that is system; The carrier identification that is the Scell-1 that safeguards of UE1 is consistent with the carrier identification of the Scell-1 of UE0 maintenance; The carrier identification of the Scell-2 that UE2 safeguards is consistent with the carrier identification of the Scell-2 that UE0 safeguards; As shown in table 5; Then: the cell_sign of the Scell-1 that UE1 safeguards is corresponding with the carrier wave indication territory among the PDCCH1, so the Scell-1 corresponding random of the UE1 Scell-1 corresponding random that inserts response and UE0 inserts the coexist PDSCH of PDCCH1 scheduling of response one and go up and carry, and UE1 obtains its Scell-1 corresponding random access and responds from the PDSCH of PDCCH1 scheduling; The cell_sign of the Scell-2 that UE2 safeguards is corresponding with the carrier wave indication territory among the PDCCH2; Therefore the Scell-2 corresponding random of the UE2 Scell-2 corresponding random that inserts response and UE0 inserts the coexist PDSCH of PDCCH2 scheduling of response one and goes up and carry, and UE2 obtains its Scell-2 corresponding random and inserts response from the PDSCH of PDCCH2 scheduling;

If the cell_sign of Scell is the exclusive carrier index of UE; The numbering that is the Scell-1 that safeguards of UE1 is inconsistent with the numbering of the Scell-1 of UE0 maintenance; But the numbering of the Scell-2 that safeguards with UE0 is consistent; The numbering of the Scell-2 that the numbering of the Scell-2 that UE2 safeguards and UE0 safeguard is inconsistent; But the numbering of the Scell-1 that safeguards with UE0 is consistent, as shown in table 6, and then: the cell index of the Scell-1 that UE1 safeguards indicates the territory corresponding with the carrier wave among the PDCCH2; Therefore the Scell-1 corresponding random of the UE1 Scell-2 corresponding random that inserts response and UE0 inserts the coexist PDSCH of PDCCH2 scheduling of response one and goes up and carry, and UE1 obtains its Scell-1 corresponding random and inserts response from the PDSCH of PDCCH2 scheduling; The cell index of the Scell-2 that UE2 safeguards is corresponding with the carrier wave indication territory among the PDCCH1; Therefore the Scell-2 corresponding random of the UE2 Scell-1 corresponding random that inserts response and UE0 inserts the coexist PDSCH of PDCCH1 scheduling of response one and goes up and carry, and UE2 obtains its Scell-2 corresponding random and inserts response from the PDSCH of PDCCH1 scheduling; Owing to carried the accidental access response that different Scell go up different UEs among the PDSCH of the PDCCH of same RA-RNTI scrambling scheduling, so this PDSCH can only transmit at Pcell;

In addition, the accidental access method on the above-mentioned Scell is also applicable to the access at random on the Pcell, and when Pcell and at least one Scell of UE inserted simultaneously at random, above-mentioned accidental access method was suitable equally.Special, as a plurality of cell of definition in the system during as one group of shared TA, above-mentioned accidental access method is suitable equally, and above-mentioned Scell can refer to the cell or the Pcell of definition/configuration in advance in the cell set of a shared TA.

Base station end:

Step 1: the base station receives the preamble sequence on the PRACH channel resource on the Scell;

If Scell is last is non-competing access at random, then before this step, also comprises, the base station is sent configuration information, preamble sequence that configuration UE is exclusive and PRACH resource through PDCCHorder or RRC signaling to the Scell of UE; The PDCCH order of corresponding Scell can send on this Scell, perhaps also can send (the PDCCH UE on Pcell or other Scell sends exclusive search volume, needs configuration to stride carrier dispatching) on Pcell or other Scell; If base station configuration non-competingly insert at random, then only need on the PRACH resource that has been configured the configuration on the non-competing Scell that inserts at random, receive the preamble sequence;

Step 2: the PDCCH of the RA-RNTI scrambling of corresponding Scell accidental access response is sent in the common search space of Pcell in the base station, and sends the PDSCH of the carrying Scell accidental access response of said PDCCH scheduling;

Wherein said PDSCH can transmit at Pcell, also can transmit at Scell, and concrete mode can be made an appointment by UE and base station;

Said PDSCH can comprise a plurality of accidental access responses that on the identical PRACH resource on this Scell, send the UE of preamble simultaneously; It is accidental access response transmission simultaneously in the PDSCH of the PDCCH of this RA-RNTI scrambling scheduling of the UE on the Scell of corresponding identical RA-RNTI;

Method 1: the PDCCH of the accidental access response of the corresponding Scell that the base station employing RA-RNTI scrambling relevant with carrier information sent in Pcell common search space;

Special, when the base station does not dispose non-competingly when inserting at random, if the base station receives the preamble sequence, the PDCCH that the PDSCH of RAR is carried in scheduling need be sent in the common search space of all cell in the base station;

For example: the base station has received the identical preamble0 sequence that UE0 sends on the identical PRACH resource on Scell-1 and the Scell-2; T_id and f_id that the base station is corresponding according to the PRACH resource of the preamble0 that receives on the Scell-1; And the cell_sign of Scell-1 confirms the corresponding RA-RNTI-1 of accidental access response of the transmission on the Scell-1, the PDSCH of the preamble corresponding random access response that receives on the PDCCH scheduling carrying Scell-1 of employing RA-RNTI-1 scrambling in the common search space of Pcell; T_id and f_id that the base station is corresponding according to the PRACH resource of the preamble0 that receives on the Scell-2; And the cell_sign of Scell-2 confirms the corresponding RA-RNTI-2 of accidental access response of the transmission on the Scell-2; (above-mentioned PDSCH can transmit on Pcell in the common search space of Pcell, to adopt the preamble corresponding random that receives on the PDCCH scheduling carrying Scell-2 of RA-RNTI-2 scrambling to insert the PDSCH that responds; Also can on Scell, transmit; Make an appointment in UE and base station, i.e. wherein a kind of transmission means of regulation in the standard); In the said process; If a plurality of preamble sequences that the base station receives on the identical PRACH resource on Scell-1 and Scell-2 simultaneously; The accidental access response of the preamble sequence of corresponding identical RA-RNTI is transmission simultaneously in the PDSCH of the PDCCH of this RA-RNTI scrambling scheduling; If promptly the base station is receiving the preamble1 sequence that has also received simultaneously on the PRACH resource of preamble0 sequence from UE1 on the Scell-1; Receiving the preamble2 sequence that has also received simultaneously on the PRACH resource of preamble0 sequence from UE2 on the Scell-2, then:

If the cell_sign of the Scell carrier identification exclusive or that Pcell is exclusive that is system; The carrier identification that is the Scell-1 that safeguards of UE1 is consistent with the carrier identification of the Scell-1 of UE0 maintenance; The carrier identification of the Scell-2 that UE2 safeguards is consistent with the carrier identification of the Scell-2 that UE0 safeguards; As shown in table 5; Then: t_id and f_id that the base station is corresponding according to the PRACH resource of the preamble1 that receives on the Scell-1; And the corresponding RA-RNTI of the accidental access response of the preamble1 on the Scell-1 that confirms of the cell_sign of Scell-1 is with the RA-RNTI of the accidental access response correspondence of preamble0 UE0 Scell-1 on; Be RA-RNTI-1; T_id and f_id that the base station is corresponding according to the PRACH resource of the preamble2 that receives on the Scell-2; And the corresponding RA-RNTI of the accidental access response of the preamble2 on the Scell-2 that confirms of the cell_sign of Scell-2 is RA-RNTI-2, therefore with the RA-RNTI of the accidental access response correspondence of preamble0 UE0 Scell-2 on; The base station has been transmitted the preamble1 corresponding random of UE1 on Scell-1 simultaneously and has been inserted response in the PDSCH of the PDCCH of RA-RNTI-1 scrambling scheduling (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-1 inserts response), the base station has been transmitted the preamble2 corresponding random of UE2 on Scell-2 simultaneously and inserted response in the PDSCH of the PDCCH of RA-RNTI-2 scrambling scheduling (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-2 inserts response);

If the cell_index of Scell is the carrier index that UE safeguards; The numbering that is the Scell-1 that safeguards of UE1 is inconsistent with the numbering of the Scell-1 of UE0 maintenance; But the numbering of the Scell-2 that safeguards with UE0 is consistent; The numbering of the Scell-2 that the numbering of the Scell-2 that UE2 safeguards and UE0 safeguard is inconsistent; But the numbering of the Scell-1 that safeguards with UE0 is consistent; As shown in table 6; Then: t_id and f_id that the base station is corresponding according to the PRACH resource of the preamble1 that receives on the Scell-1; And the corresponding RA-RNTI of the accidental access response of the preamble1 on the Scell-1 that confirms of the cell_index of Scell-1 is with the RA-RNTI of the accidental access response correspondence of preamble0 UE0 Scell-2 on; Be RA-RNTI-2, t_id and f_id that the base station is corresponding according to the PRACH resource of the preamble2 that receives on the Scell-2, and the corresponding RA-RNTI of the accidental access response of the preamble2 on the Scell-2 that confirms of the cell_index of Scell-2 is with the RA-RNTI of the accidental access response correspondence of preamble0 UE0 Scell-1 on; Be RA-RNTI-1; Therefore, the base station has been transmitted the preamble1 corresponding random of UE1 on Scell-1 simultaneously and has been inserted response in the PDSCH of the PDCCH of RA-RNTI-2 scrambling scheduling (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-2 inserts response), and the base station has been transmitted the preamble2 corresponding random of UE2 on Scell-2 simultaneously and inserted response in the PDSCH of the PDCCH of RA-RNTI-1 scrambling scheduling (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-1 inserts response); Owing to carried the accidental access response that different Scell go up different UEs among the PDSCH of the PDCCH of same RA-RNTI scrambling scheduling, so this PDSCH can only transmit at Pcell;

Method 2: the corresponding Scell of PDCCH of the RA-RNTI scrambling of sending in the Pcell common search space is indicated in the base station through the indication of the carrier wave among the PDCCH of RA-RNTI scrambling territory;

The PDSCH that the indicated information in carrier wave indication territory is dispatched for this PDCCH corresponds to the accidental access response of that Scell, and its indication information can be cell_sign;

The transmission simultaneously in the PDSCH of the carrier wave indication territory of this RA-RNTI scrambling PDCCH scheduling corresponding of the accidental access response of UE on the Scell of corresponding identical RA-RNTI and Scell sign with this Scell index;

More excellent, in order not increase blind check, the PDCCH of RA-RNTI scrambling can adopt DCI format 1A, and this moment is reusable wherein:

For example: the base station has received the identical preamble0 sequence that UE0 sends on the identical PRACH resource on Scell-1 and the Scell-2; Then the base station is according to the t_id and the f_id of the correspondence of the PRACH resource on Scell-1 and the Scell-2; Confirm the RA-RNTI that two Scell are corresponding identical; In the common search space of Pcell, send 2 PDCCH that adopt this RA-RNTI scrambling; Carrier wave indication territory among the PDCCH of the last preamble0 response of corresponding Scell-1 is changed to and the corresponding value of the carrier identification of Scell-1; And the accidental access response of the preamble0 that receives on the Scell-1 transmitted in the PDSCH of this PDCCH scheduling; Corresponding Scell-2 is gone up carrier wave indication territory is changed to and the corresponding value of the carrier identification of Scell-2 among the PDCCH of preamble0 response, and with the accidental access response of the preamble0 that receives on the Scell-2 in the PDSCH of this PDCCH scheduling transmission (above-mentioned PDSCH can transmit on Pcell, also can on Scell, transmit; Make an appointment in UE and base station, i.e. wherein a kind of transmission means of regulation in the standard); In the said process; If the preamble sequence that the base station receives on the identical PRACH resource on Scell-1 and Scell-2 simultaneously from a plurality of UE; The accidental access response of the preamble of then corresponding identical Scell carrier identification (corresponding with the carrier wave indication territory among the PDCCH) transmits in having the PDSCH that indicates the PDCCH of the RA-RNTI scrambling in territory to dispatch with the corresponding carrier wave of this Scell carrier identification simultaneously; If promptly the base station is receiving the preamble1 sequence that has also received simultaneously on the PRACH resource of preamble0 sequence from UE1 on the Scell-1; Receiving the preamble2 sequence that has also received simultaneously on the PRACH resource of preamble0 sequence from UE2 on the Scell-2, then:

If the cell_sign of the Scell carrier identification exclusive or that Pcell is exclusive that is system; The carrier identification that is the Scell-1 that safeguards of UE1 is consistent with the carrier identification of the Scell-1 of UE0 maintenance; The carrier identification of the Scell-2 that UE2 safeguards is consistent with the carrier identification of the Scell-2 that UE0 safeguards; As shown in table 5; Then: the base station has been transmitted the preamble1 corresponding random of UE1 on Scell-1 simultaneously and has been inserted response in the PDSCH (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-1 inserts response) that has with the PDCCH scheduling in the corresponding carrier wave of the cell_sign of Scell-1 indication territory, and the base station has been transmitted the preamble2 corresponding random of UE2 on Scell-2 simultaneously and inserted response in the PDSCH (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-2 inserts response) that has with the PDCCH scheduling in the corresponding carrier wave indication of the cell_sign of Scell-2 territory;

If the cell_sign of Scell is the exclusive carrier index of UE; The numbering that is the Scell-1 that safeguards of UE1 is inconsistent with the numbering of the Scell-1 of UE0 maintenance; But the numbering of the Scell-2 that safeguards with UE0 is consistent; The numbering of the Scell-2 that the numbering of the Scell-2 that UE2 safeguards and UE0 safeguard is inconsistent; But the numbering of the Scell-1 that safeguards with UE0 is consistent; As shown in table 6; Then: the base station has been transmitted the preamble1 corresponding random of UE1 on Scell-1 simultaneously and has been inserted response in the PDSCH (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-2 inserts response) that has with the PDCCH scheduling in the corresponding carrier wave of the cell index of Scell-2 indication territory, and the base station has been transmitted the preamble2 corresponding random of UE2 on Scell-2 simultaneously and inserted response in the PDSCH (promptly carrying the PDSCH that the preamble0 corresponding random of UE0 on Scell-1 inserts response) that has with the PDCCH scheduling in the corresponding carrier wave indication of the cell index of Scell-1 territory; Owing to carried the accidental access response that different Scell go up different UEs among the PDSCH of the PDCCH of same RA-RNTI scrambling scheduling, so this PDSCH can only transmit at Pcell;

The embodiment of the invention has provided a kind of method that inserts at random; This method can be supported a Scell; Perhaps Pcell and Scell insert on perhaps a plurality of Scell simultaneously at random, thereby need not increase on the basis of UE to PDCCH blind check number of times; When having guaranteed in the LTE-A system different frequency range carrier aggregation, various ce ll can independently carry out the TA adjustment.

Referring to Fig. 9, the embodiment of the invention provides a kind of terminal, it is characterized in that, this terminal comprises:

Transmitting element 90 is used for confirming the random access guiding preamble sequence that need on the sub-district that current subframe inserts at random, send and sends the Physical Random Access Channel PRACH resource that random access leader sequence uses; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource;

Detecting unit 91; Be used for according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that sends on the said sub-district, use the physical downlink control channel PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

Lock unit 92; Be used for according to detected said PDCCH; Reception carries the Physical Downlink Shared Channel PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up timing advance TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

This terminal also comprises:

Receiving element 93; Be used to receive special-purpose random access leader sequence numbering and the PRACH resource number that send through PDCCH order or radio resource control RRC signaling the base station; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in said sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.

Said receiving element 93 is used for:

On the auxilliary sub-district or main plot at said terminal; Receive said PDCCH order; When said PDCCH order is not adopted when striding carrier dispatching; The PDCCH order correspondence that receives triggers the non-competing of sub-district at said PDCCH command transfer place and inserts at random, and when carrier dispatching was striden in said PDCCH order employing, the corresponding carrier wave that triggers in the said PDCCH order of the PDCCH order that receives indicated the non-competing of indicated sub-district, territory to insert at random.

Said detecting unit 91 is used for:

Confirm said RA-RNTI according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

Said carrier identification information is: the carrier index that safeguard at the terminal, or the system-level numbering that said sub-district is given in definition in the system, or define numbering in the set of cells of corresponding same main plot to a main plot level of said sub-district.

Said lock unit 92 is used for:

When said carrier identification information is the carrier index of terminal maintenance, receive said PDSCH in the main plot at said terminal.

Said lock unit 92 is used for:

On the sub-district of the main plot at said terminal or said transmission random access leader sequence, receive said PDSCH.

Said sub-district is the auxilliary sub-district at said terminal.

Referring to Figure 10, the embodiment of the invention provides a kind of base station, and this base station comprises:

Receiving element 101 is used for the random access guiding preamble sequence that receiving terminal sends on the Physical Random Access Channel PRACH of sub-district resource;

Scheduling unit 102; Be used for information according to the PRACH resource of the said random access leader sequence of transmission on carrier identification information and the said sub-district of the sub-district that receives random access leader sequence; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that receives on the said sub-district; Send the physical downlink control channel PDCCH of using this RA-RNTI scrambling in the common search space of setting the sub-district, receive with dispatch terminal and carry the Physical Downlink Shared Channel PDSCH that the random access leader sequence corresponding random inserts response;

Transmitting element 103 is used for sending the PDSCH that carries said accidental access response to the terminal, comprises up timing advance TA in the said accidental access response.

This base station also comprises:

Indicating member 104; Be used for through PDCCH order or radio resource control RRC signaling; Send special-purpose random access leader sequence numbering and PRACH resource number to the terminal; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in the sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.

Said indicating member 104 is used for:

On the auxilliary sub-district or main plot at the terminal that needs insert at random; Send said PDCCH order; When said PDCCH order is not adopted when striding carrier dispatching; The non-competing of sub-district of the said PDCCH order of the corresponding triggering transmission of said PDCCH order of sending inserted at random, and when carrier dispatching was striden in said PDCCH order employing, the corresponding carrier wave that triggers in the said PDCCH order of the said PDCCH order of transmission indicated the non-competing of indicated sub-district, territory to insert at random.

Said scheduling unit 102 is used for:

Adopt non-competingly when inserting at random when said base station configuration terminal, send the PDCCH that uses said RA-RNTI scrambling in the common search space that is disposing the main plot of adopting the non-competing terminal of inserting at random;

When said base station configurating terminal adopt not non-competingly when inserting at random, send the PDCCH that uses said RA-RNTI scrambling in the common search space of all sub-districts.

Said scheduling unit 102 is used for:

Confirm said RA-RNTI according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

Said transmitting element 103 is used for:

With the accidental access response of the random access leader sequence of the identical RA-RNTI of correspondence, transmission simultaneously on the PDSCH that PDCCH dispatched of this RA-RNTI scrambling.

Said carrier identification information is the carrier index that safeguard at the terminal, or the system-level numbering that said sub-district is given in definition in the system, or defines the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

Said transmitting element 103 is used for:

Be the carrier index safeguarded of terminal and insert at random to non-competing and when inserting at random, send said PDSCH in said carrier identification information in the main plot at the corresponding terminal of the said random access leader sequence that receives.

Said transmitting element 103 is used for:

Said PDSCH is sent in main plot at the corresponding terminal of the said random access leader sequence that receives; Perhaps,

On the sub-district at the said random access leader sequence place that receives, send said PDSCH.

Said sub-district is the auxilliary sub-district at terminal.

Still referring to Fig. 9, the embodiment of the invention provides a kind of terminal, and this terminal comprises:

Detecting unit 91; Be used for according to the information of sending the employed said PRACH resource of said random access leader sequence on the said sub-district; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that sends on the said sub-district, use the physical downlink control channel PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal;

Lock unit 92; Be used for the indicated carrier identification information in carrier identification indication territory according to detected said PDCCH; Reception carries the Physical Downlink Shared Channel PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up timing advance TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.

This terminal also comprises:

Said receiving element 93 is used for:

Said lock unit 92 is used for:

Reception carries the said PDCCH with the corresponding to carrier identification information of carrier identification information of the sub-district of said transmission random access leader sequence; The PDSCH that is dispatched obtains the accidental access response of the random access leader sequence that said sub-district sends from this PDSCH.

Said lock unit 92 is used for:

Said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH.

When said PDCCH adopts DCI form 1A, reuse one or the combination in any of mixing in automatic request retransmission HARQ process number indication territory, redundancy versions indication territory, the descending allocation index indication territory, as the indication of the carrier identification among said PDCCH territory.

Said lock unit 92 is used for:

Said sub-district is the auxilliary sub-district at said terminal.

Still referring to Figure 10, the embodiment of the invention provides a kind of base station, and this base station comprises:

Scheduling unit 102; Be used for information according to the PRACH resource of the said random access leader sequence of transmission on the sub-district that receives random access leader sequence; Confirm the said random access leader sequence corresponding random access of radio network temporary mark RA-RNTI that receives on the said sub-district; Send the PDCCH that carries carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of setting the sub-district, receive the PDSCH of the accidental access response that carries random access leader sequence with dispatch terminal; Said carrier identification indication territory indication receives the carrier identification information of the said sub-district of random access leader sequence;

This base station also comprises:

Said indicating member 104 is used for:

Said scheduling unit 102 is used for:

Adopt non-competingly when inserting at random when said base station configuration terminal, send the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling in the common search space that is disposing the main plot of adopting the non-competing terminal of inserting at random;

When said base station configurating terminal adopt not non-competingly when inserting at random, send the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of all sub-districts.

Said transmitting element 103 is used for:

With the accidental access response of identical RA-RNTI of correspondence and the random access leader sequence that on sub-district, receives, indicate transmission simultaneously on the PDSCH that PDCCH dispatched of carrier identification information of said sub-district in carrier identification indication this RA-RNTI scrambling and that carry territory with same carrier wave identification information.

Said transmitting element 103 is used for:

On the sub-district at the random access leader sequence place that receives, send said PDSCH.

Said sub-district is the auxilliary sub-district at terminal.

To sum up, beneficial effect of the present invention comprises:

In a kind of scheme that the embodiment of the invention provides; Definite the inserting the preamble sequence at random and sending the PRACH resource that random access leader sequence uses of need on the sub-district that current subframe inserts at random, sending in terminal; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource; Then according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to send on the said sub-district; Use the PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal; According to detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.It is thus clear that, adopt this method, can realize that end side is being assisted the access at random in a plurality of sub-districts of sub-district or while in the carrier aggregation system.

Accordingly; The base station preamble of the access at random sequence that receiving terminal sends on the PRACH of sub-district resource; Information according to the PRACH resource of the said random access leader sequence of transmission on the carrier identification information of the sub-district that receives random access leader sequence and the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to receive on the said sub-district; Send the PDCCH that uses this RA-RNTI scrambling in the common search space of setting the sub-district; Receive the PDSCH that carries random access leader sequence corresponding random access response with dispatch terminal, and send the PDSCH that carries said accidental access response, comprise up TA in the said accidental access response to the terminal.It is thus clear that, adopting this method, base station side can realize assisting the access at random in a plurality of sub-districts of sub-district or while in the carrier aggregation system.

In the another kind of scheme that the embodiment of the invention provides; Definite the inserting the preamble sequence at random and sending the PRACH resource that random access leader sequence uses of need on the sub-district that current subframe inserts at random, sending in terminal; On said sub-district,, send said random access leader sequence to the base station through said PRACH resource; Then according to the information of sending the employed said PRACH resource of said random access leader sequence on the said sub-district; The corresponding RA-RNTI of said random access leader sequence that confirms to send on the said sub-district uses the PDCCH of this RA-RNTI scrambling in the common search spatial detection of the main plot at said terminal; According to the indicated carrier identification information in the indication territory of the carrier identification among the detected said PDCCH; Reception carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response, and according to the up TA in the said accidental access response uplink synchronous adjustment is carried out in said sub-district.It is thus clear that, adopt this method, can realize that end side is being assisted the access at random in a plurality of sub-districts of sub-district or while in the carrier aggregation system.

Accordingly; The base station preamble of the access at random sequence that receiving terminal sends on the PRACH of sub-district resource; Information according to the PRACH resource of the said random access leader sequence of transmission on the sub-district that receives random access leader sequence; The corresponding RA-RNTI of said random access leader sequence that confirms to receive on the said sub-district; Send the PDCCH that carries carrier identification indication territory that uses said RA-RNTI scrambling in the common search space of setting the sub-district, receive the PDSCH of the accidental access response that carries random access leader sequence with dispatch terminal; Said carrier identification indication territory indication receives the carrier identification information of the said sub-district of random access leader sequence; The PDSCH that carries said accidental access response is sent to the terminal in the base station then, comprises up TA in the said accidental access response.It is thus clear that, adopting this method, base station side can realize assisting the access at random in a plurality of sub-districts of sub-district or while in the carrier aggregation system.

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 through 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 ability 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 on computer or other programmable devices, carrying out 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.

Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.

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, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims

1. the accidental access method in the carrier aggregation system is characterized in that this method comprises:

2. the method for claim 1; It is characterized in that; Before the terminal confirmed and to send the PRACH resource of random access leader sequence use at the random access leader sequence that sends on the sub-district that current subframe inserts at random, this method further comprised:

The terminal receives special-purpose random access leader sequence numbering and the PRACH resource number that send through PDCCH order or radio resource control RRC signaling the base station; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in said sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.

3. method as claimed in claim 2; It is characterized in that; Said terminal is on the auxilliary sub-district or main plot at said terminal; Receive said PDCCH order, do not adopt when striding carrier dispatching when said PDCCH order, corresponding the non-competing of sub-district that triggers said PDCCH command transfer place inserted at random in the PDCCH order that said terminal receives; When carrier dispatching was striden in said PDCCH order employing, the corresponding carrier wave that triggers in the said PDCCH order of the PDCCH order that said terminal receives indicated the non-competing of indicated sub-district, territory to insert at random.

4. the method for claim 1; It is characterized in that; Said terminal confirms that according to the information of sending the employed said PRACH resource of said random access leader sequence on the carrier identification information of said sub-district and the said sub-district the corresponding RA-RNTI of said random access leader sequence that sends on the said sub-district comprises:

Confirm said RA-RNTI according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

5. like arbitrary described method among the claim 1-4; It is characterized in that; Said carrier identification information is: the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

6. method as claimed in claim 5 is characterized in that, when said carrier identification information was the carrier index of terminal maintenance, said terminal received said PDSCH in the main plot at said terminal.

7. like arbitrary described method among the claim 1-4, it is characterized in that said terminal receives the PDSCH of the accidental access response that carries the said random access leader sequence that sends on the corresponding said sub-district according to detected said PDCCH, comprising:

Said terminal receives said PDSCH on the sub-district of the main plot at said terminal or said transmission random access leader sequence.

8. like arbitrary described method among the claim 1-4, it is characterized in that said sub-district is the auxilliary sub-district at said terminal.

9. the accidental access method in the carrier aggregation system is characterized in that this method comprises:

10. method as claimed in claim 9; It is characterized in that; Before the terminal confirmed and to send the PRACH resource of random access leader sequence use at the random access leader sequence that sends on the sub-district that current subframe inserts at random, this method further comprised:

11. method as claimed in claim 10; It is characterized in that; Said terminal is on the auxilliary sub-district or main plot at said terminal; Receive said PDCCH order, do not adopt when striding carrier dispatching when said PDCCH order, corresponding the non-competing of sub-district that triggers said PDCCH command transfer place inserted at random in the PDCCH order that said terminal receives; When carrier dispatching was striden in said PDCCH order employing, the corresponding carrier wave that triggers in the said PDCCH order of the PDCCH order that said terminal receives indicated the non-competing of indicated sub-district, territory to insert at random.

12. method as claimed in claim 9; It is characterized in that; The terminal receives and carries the PDSCH that the said random access leader sequence corresponding random of sending on the said sub-district inserts response according to the indicated carrier identification information in the indication territory of the carrier identification among the detected said PDCCH, comprising:

The terminal receives the said PDCCH carry with the corresponding to carrier identification information of carrier identification information of the sub-district of said transmission random access leader sequence; The PDSCH that is dispatched obtains the accidental access response of the random access leader sequence that said sub-district sends from this PDSCH.

13. like arbitrary described method among the claim 9-12; It is characterized in that; Said carrier identification information is the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

14. method as claimed in claim 13 is characterized in that, when said carrier identification information was the carrier index of terminal maintenance, the terminal received said PDSCH in the main plot at said terminal.

15., it is characterized in that said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH like arbitrary described method among the claim 9-12.

16. method as claimed in claim 15; It is characterized in that; When said PDCCH adopts DCI form 1A; Reuse one or the combination in any of mixing in automatic request retransmission HARQ process number indication territory, redundancy versions indication territory, the descending allocation index indication territory, as the indication of the carrier identification among said PDCCH territory.

17., it is characterized in that the terminal receives said PDSCH like arbitrary described method among the claim 9-12 on the sub-district of the main plot at said terminal or said transmission random access leader sequence.

18., it is characterized in that said sub-district is the auxilliary sub-district at said terminal like arbitrary described method among the claim 9-12.

19. the random access processing method in the carrier aggregation system is characterized in that this method comprises:

20. method as claimed in claim 19 is characterized in that, before the random access leader sequence that receiving terminal on the PRACH of the sub-district resource sends, this method further comprises in the base station:

The base station is through PDCCH order or radio resource control RRC signaling; Send special-purpose random access leader sequence numbering and PRACH resource number to the terminal; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in the sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.

21. method as claimed in claim 20; It is characterized in that; The base station is on the auxilliary sub-district or main plot at the terminal that needs insert at random; Send said PDCCH order, do not adopt when striding carrier dispatching when said PDCCH order, corresponding the non-competing of sub-district that triggers the said PDCCH order of transmission inserted at random in the said PDCCH order that send said base station; When said PDCCH ordered employing to stride carrier dispatching, indicated the non-competing of sub-district in carrier wave indication territory during the said PDCCH of the corresponding triggering of said PDCCH order that send said base station orders inserted at random.

22. method as claimed in claim 19 is characterized in that, said PDCCH in the said RA-RNTI scrambling of common search space transmission use of setting the sub-district specifically comprises:

Adopt non-competingly when inserting at random when said base station configuration terminal, the PDCCH that uses said RA-RNTI scrambling is sent in said base station in the common search space that is disposing the main plot of adopting the non-competing terminal of inserting at random;

23. method as claimed in claim 19; It is characterized in that; Said base station confirms that according to the information of the PRACH resource of the said random access leader sequence of transmission on the carrier identification information of the sub-district that receives random access leader sequence and the said sub-district the corresponding RA-RNTI of random access leader sequence that receives on the said sub-district comprises:

Confirm said RA-RNTI according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

24., it is characterized in that said base station is transmitted the accidental access response of the random access leader sequence of the identical RA-RNTI of correspondence simultaneously like arbitrary described method among the claim 19-23 on the PDSCH that PDCCH dispatched of this RA-RNTI scrambling.

25. like arbitrary described method among the claim 19-23; It is characterized in that; Said carrier identification information is the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

26. method as claimed in claim 25; It is characterized in that; Be the carrier index safeguarded of terminal and insert at random to non-competing when inserting at random that in said carrier identification information said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station.

27., it is characterized in that the PDSCH that carries said accidental access response is sent to the terminal in said base station, comprising like arbitrary described method among the claim 19-23:

Said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station; Perhaps,

Said PDSCH is sent in said base station on the sub-district at the said random access leader sequence place that receives.

28., it is characterized in that said sub-district is the auxilliary sub-district at terminal like arbitrary described method among the claim 19-23.

29. the random access processing method in the carrier aggregation system is characterized in that this method comprises:

30. method as claimed in claim 29 is characterized in that, before the random access leader sequence that receiving terminal on the PRACH of the sub-district resource sends, this method further comprises in the base station:

31. method as claimed in claim 30; It is characterized in that; The base station is on the auxilliary sub-district or main plot at the terminal that needs insert at random; Send said PDCCH order, do not adopt when striding carrier dispatching when said PDCCH order, corresponding the non-competing of sub-district that triggers the said PDCCH order of transmission inserted at random in the said PDCCH order that send said base station; When said PDCCH ordered employing to stride carrier dispatching, indicated the non-competing of sub-district in carrier wave indication territory during the said PDCCH of the corresponding triggering of said PDCCH order that send said base station orders inserted at random.

32. method as claimed in claim 29 is characterized in that, the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling is sent in said base station in the common search space of setting the sub-district, specifically comprise:

Adopt non-competingly when inserting at random when said base station configuration terminal, the PDCCH that has carrier identification indication territory that uses said RA-RNTI scrambling is sent in said base station in the common search space that is disposing the main plot of adopting the non-competing terminal of inserting at random;

33. method as claimed in claim 29; It is characterized in that; Said base station is the accidental access response of identical RA-RNTI of correspondence and the random access leader sequence that on the sub-district with same carrier wave identification information, receives, indicates transmission simultaneously on the PDSCH that PDCCH dispatched of carrier identification information of said sub-district in carrier identification indication this RA-RNTI scrambling and that carry territory.

34. like arbitrary described method among the claim 29-33; It is characterized in that; Said carrier identification information is the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

35. method as claimed in claim 34; It is characterized in that; Be the carrier index safeguarded of terminal and insert at random to non-competing when inserting at random that in said carrier identification information said PDSCH is sent in the main plot at the corresponding terminal of the said random access leader sequence that receives in said base station.

36., it is characterized in that said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH like arbitrary described method among the claim 29-33.

37. method as claimed in claim 36; It is characterized in that; When said PDCCH adopts DCI form 1A; Reuse one or the combination in any of mixing in automatic request retransmission HARQ process number indication territory, redundancy versions indication territory, the descending allocation index indication territory, as the indication of the carrier identification among said PDCCH territory.

38., it is characterized in that the PDSCH that carries said accidental access response is sent to the terminal in said base station, comprising like arbitrary described method among the claim 29-33:

Said PDSCH is sent in said base station on the sub-district at the random access leader sequence place that receives.

39., it is characterized in that said sub-district is the auxilliary sub-district at terminal like arbitrary described method among the claim 29-33.

40. a terminal is characterized in that, this terminal comprises:

41. terminal as claimed in claim 40 is characterized in that, this terminal also comprises:

Receiving element; Be used to receive special-purpose random access leader sequence numbering and the PRACH resource number that send through PDCCH order or radio resource control RRC signaling the base station; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in said sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.

42. terminal as claimed in claim 41 is characterized in that, said receiving element is used for:

43. terminal as claimed in claim 40 is characterized in that, said detecting unit is used for:

Confirm said RA-RNTI according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

44. like arbitrary described terminal among the claim 40-43; It is characterized in that; Said carrier identification information is: the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

45. terminal as claimed in claim 44 is characterized in that, said lock unit is used for:

46., it is characterized in that said lock unit is used for like arbitrary described terminal among the claim 40-43:

47., it is characterized in that said sub-district is the auxilliary sub-district at said terminal like arbitrary described terminal among the claim 40-43.

48. a terminal is characterized in that, this terminal comprises:

49. terminal as claimed in claim 48 is characterized in that, this terminal also comprises:

50. terminal as claimed in claim 49 is characterized in that, said receiving element is used for:

51. terminal as claimed in claim 48 is characterized in that, said lock unit is used for:

52. like arbitrary described terminal among the claim 48-51; It is characterized in that; Said carrier identification information is the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

53. terminal as claimed in claim 52 is characterized in that, said lock unit is used for:

54., it is characterized in that said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH like arbitrary described terminal among the claim 48-51.

55. terminal as claimed in claim 54; It is characterized in that; When said PDCCH adopts DCI form 1A; Reuse one or the combination in any of mixing in automatic request retransmission HARQ process number indication territory, redundancy versions indication territory, the descending allocation index indication territory, as the indication of the carrier identification among said PDCCH territory.

56., it is characterized in that said lock unit is used for like arbitrary described terminal among the claim 48-51:

57., it is characterized in that said sub-district is the auxilliary sub-district at said terminal like arbitrary described terminal among the claim 48-51.

58. a base station is characterized in that, this base station comprises:

59. base station as claimed in claim 58 is characterized in that, this base station also comprises:

Indicating member; Be used for through PDCCH order or radio resource control RRC signaling; Send special-purpose random access leader sequence numbering and PRACH resource number to the terminal; Said special-purpose random access leader sequence numbering is used to indicate the employed random access leader sequence in the sub-district that need insert at random; Said PRACH resource number is used to indicate said sub-district to send the employed PRACH resource of said random access leader sequence, and said PDCCH order or RRC signaling are used to trigger the non-competing of said terminal and insert at random.

60. base station as claimed in claim 59 is characterized in that, said indicating member is used for:

61. base station as claimed in claim 58 is characterized in that, said scheduling unit is used for:

62. base station as claimed in claim 58 is characterized in that, said scheduling unit is used for:

Confirm said RA-RNTI according to following formula:

RA-RNTI=1+t_id+10*f_id+60*cell_sign, wherein:

63., it is characterized in that said transmitting element is used for like arbitrary described base station among the claim 58-62:

64. like arbitrary described base station among the claim 58-62; It is characterized in that; Said carrier identification information is the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

65., it is characterized in that said transmitting element is used for like the described base station of claim 64:

66., it is characterized in that said transmitting element is used for like arbitrary described base station among the claim 58-62:

67., it is characterized in that said sub-district is the auxilliary sub-district at terminal like arbitrary described base station among the claim 58-62.

68. a base station is characterized in that, this base station comprises:

69., it is characterized in that this base station also comprises like the described base station of claim 68:

70., it is characterized in that said indicating member is used for like the described base station of claim 69:

71., it is characterized in that said scheduling unit is used for like the described base station of claim 68:

72., it is characterized in that said transmitting element is used for like the described base station of claim 68:

73. like arbitrary described base station among the claim 68-72; It is characterized in that; Said carrier identification information is the carrier index that safeguard at the terminal; Or define a system-level numbering of giving said sub-district, or define the numbering of a main plot level of giving said sub-district in the set of cells of corresponding same main plot.

74., it is characterized in that said transmitting element is used for like the described base station of claim 73:

75., it is characterized in that said carrier identification indication territory is the reusing or the bit for increasing newly of original bit among the said PDCCH like arbitrary described base station among the claim 68-72.

76. like the described base station of claim 75; It is characterized in that; When said PDCCH adopts DCI form 1A; Reuse one or the combination in any of mixing in automatic request retransmission HARQ process number indication territory, redundancy versions indication territory, the descending allocation index indication territory, as the indication of the carrier identification among said PDCCH territory.

77., it is characterized in that said transmitting element is used for like arbitrary described base station among the claim 68-72:

78., it is characterized in that said sub-district is the auxilliary sub-district at terminal like arbitrary described base station among the claim 68-72.