CN103533663A

CN103533663A - Random access method and equipment thereof

Info

Publication number: CN103533663A
Application number: CN201310452277.3A
Authority: CN
Inventors: 付喆; 许芳丽
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-09-27
Filing date: 2013-09-27
Publication date: 2014-01-22
Anticipated expiration: 2033-09-27
Also published as: CN103533663B

Abstract

The invention discloses a random access method and equipment thereof. According to the invention, a random access procedure between UE (User Equipment) and an SeNB (Secondary evolved Node B) is realized under a multi-base-station polymerization scene, in particular a separation bearing scene, through a direct mutual cooperative manner of the UE and the SeNB or an MeNB (Master evolved Node B) assistant manner, and the random access procedure of the UE, which supports the multi-base-station polymerization, in particular the separation bearing, on the SeNB is solved, so that synchronization of the UE and the SeNB is realized or uplink and downlink transmission resources are obtained from the SeNB.

Description

Accidental access method and equipment thereof

Technical field

The present invention relates to the communications field, relate in particular to accidental access method and equipment thereof.

Background technology

E-UTRAN(evolved Universal Terrestrial Radio Access Network, the general continental rise wireless access network of evolution) as shown in Figure 1, E-UTRAN is by eNB(evolved NodeB for the network architecture, enode b, i.e. base station) form.ENB completes Access Network function, with UE(User Equipment, subscriber equipment, i.e. terminal) pass through idle port communication.Between UE and eNB, not only exist chain of command to be connected but also exist user's face to connect.For each, be attached to the UE of network, by a MME(Mobile Management Entity, Mobility Management Entity) for it provides service, between MME and eNB, adopt S1-MME interface to be connected.S1-MME interface, for UE provides chain of command service, comprises mobile management and bearer management function.S-GW(Serving Gate Way, gateway) with between eNB adopt S1-U interface to be connected, the UE that is attached to network for each, has a S-GW to provide service for it.S1-U interface provides the service of user's face for UE, and the user face data of UE is carried between S-GW and eNB and is transmitted by S1-U.

Along with fast development and the continuous growth of user to data service rate and capacity requirement of intelligent terminal, traditional macro base station individual layer overlay network can not meet people's business demand.Therefore, the mode that 3GPP has introduced layering networking solves this problem: by hot spot region, the little overlay environment such as family's indoor environment, working environment lays some lower powered nodes and (is called home base stations Local eNB or small-cell Small cell, comprise the forms such as Femto, Pico or relaying), provide among a small circle and cover, obtain the effect of cell splitting, make operator to provide more high data rate, business more cheaply for user.

In layering networking situation, in order to strengthen mobile management or to improve peak rate, the resource of the community of a plurality of base stations of UE possibility polymerization, also can support further a kind of separated network architecture of carrying, make a part of radio bearer (Radio Bearer of UE, RB) and RRC(Radio Resource Control, Radio Resource control) connect and maintain MeNB(Master eNB, main control base station) on the community of management, another part radio bearer is in SeNB(Secondary eNB, slave base stations) management community on.

Under carrying separation scene, a part of Deta bearer of UE maintains management on MeNB community, and another part Deta bearer carries out maintenance management on SeNB community, and the carrying of the chain of command of UE is managed by MeNB cell maintenance.

Random access procedure (Random Access Procedure, RA procedure) be UE and network side set up wireless link must be through process.Only, after having accessed at random, between eNB and UE, just may carry out regular data transmission and reception.UE can realize two basic functions by random access: (1) obtain and eNB between uplink synchronous; (2) application uplink transmission resource.Random access procedure is applied to following 6 kinds of scenes: (1) is idle from RRC_IDLE(RRC) state initially accesses community, and RRC connects and sets up; (2) after Radio Link Failure, recover, i.e. RRC connection reconstruction; (3) in handoff procedure, synchronize with Target cell; (4) downlink data arrival and UE eat dishes without rice or wine in uplink loss state; (5) upstream data arrives and UE eats dishes without rice or wine in uplink loss state, though or not step-out but need by random access application uplink transmission resource; (6) assist location, network utilisation accesses acquisition time lead (Timing Advance, TA) at random.

In random access procedure, UE is at PRACH(Physical Random Access Channel, Physical Random Access Channel) upper leading to eNB transmission Preamble() code, the Preamble code possibility of selecting based on UE bumps, random access procedure can be divided into the random access of competition (Contention Based Random Access, CBRA) and two types of non-competing random accesses (Contention-Free Random Access, CFRA).For RRC, connect and set up, RRC connection reconstruction, UL(Uplink, up) data arrival scene, random access is independently triggered by UE, and eNB is without any prior information, and be therefore at war with random access; For handoff scenario, DL(Downlink, descending) data arrival scene, UE is according to the non-competing random access of eNB indication initiation.

Fig. 2 A shows competition random access procedure, and this flow process can comprise:

(1) Msg1: send random access Preamble

This message is UL message.ENB is responsible for being configured to preamble code and for transmitting the PRACH channel resource of Preamble code, and will configure (comprising ra-PreambleIndex, prach-ConfigIndex, PRACH Mask Index etc.) result and notify to UE.

For competing the Preamble set of random access, can Further Division be two Preamble code character: A groups and B group.After having selected Preamble code character, from then on UE selects a Preamble code in all Preamble codes corresponding to code character at random equably, and select equably at random a PRACH channel in continuous three subframes that start in the subframe that comprises PRACH channel from first, on the PRACH channel of selecting, send the Preamble code of selecting.

(2) Msg2: accidental access response (RAR)

This message is DL message.This message is eNB response to UE after receiving Msg1, and accidental access response message sends in accidental access response window.UE is in PCell(main plot) on CSS(public search space) the upper RA-RNTI(RA-Radio Network Temporary Identity that detects, random access radio network temporary mark) the PDCCH(Physical Downlink Control Channel of scrambling, Physical Downlink Control Channel) detect RAR message.

(3) Msg3: scheduled transmission

This message is UL message.UE correctly receives after Msg2, in the uplink transmission resource of its distribution, transmits Msg3.

(4) Msg4: competition solves

This message is DL message, for solving potential competition, has determined the concrete UE of this random access procedure.UE starts competition and solves timer when sending Msg3, and restarts this timer when retransmitting Msg3 at every turn.Msg4 content is corresponding with Msg3 content.

Fig. 2 B shows the flow process of non-competing random access procedure, and this flow process can comprise:

(1) Msg0: random access indication

Msg0 message content comprises that UE initiates PRACH resource and Preamble resource that non-competing RA is used.

(2) Msg1: send Preamble code

The Preamble code sending has been distributed by eNB and has indicated, so UE does not need to select Preamble code character and Preamble code.If eNB does not indicate the PRACH channel set that allows use, in the subframe that UE comprises PRACH channel at first, select equably at random a PRACH channel; Otherwise UE selects article one PRACH channel in allowing the PRACH channel set using.UE sends the Preamble code of appointment on the PRACH channel of selecting afterwards.

(3) Msg2: accidental access response (RAR)

The sending and receiving of RAR message is basic identical with the processing in competition random access procedure.Difference is:

A) there is not competition in non-competing random access, therefore do not relate to the transmission of Msg3, do not need to comprise Msg3 transfer resource assignment information in accidental access response message;

While b) needing again to send Preamble code after receiving random access response message failure, UE need to not wait for a period of time based on keeping out of the way indication, but can directly start the transmission of the definite and Preamble code of PRACH channel;

C) if UE judgement accidental access response message receives successfully, think that whole non-competing random access procedure successfully finishes.

Due to a plurality of base stations of UE polymerization, the frequency band that each base station (comprising SeNB and MeNB) is used may be different, and deployed position also may be different, so UE may need to be supported in the random access procedure on SeNB community.

Summary of the invention

The embodiment of the present invention provides and has counted at random method and equipment thereof, in order to particularly to carry under separated scene in the polymerization of many base stations, realizes terminal in the random access of slave base stations.

An accidental access method, comprising:

Terminal in the community of main control base station or the community of slave base stations receive the physical downlink control channel commands PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, obtain random access lead code resource and/or the Physical Random Access Channel PRACH resource of the community of slave base stations described in described PDCCH order, described random access lead code is used at the community of described slave base stations initiating random access procedure;

Described terminal sends random access lead code according to described random access lead code resource and/or PRACH resource;

Described terminal in the community of main control base station or the community of described slave base stations monitor the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, obtain the accidental access response message that belongs to described terminal in described PDCCH; Wherein, the random access lead code that the described accidental access response message carrying in the PDCCH of the RA-RNTI scrambling receiving in the community of described main control base station is described slave base stations to be sent according to described terminal generates and sends to described main control base station.

An accidental access method, comprising:

Slave base stations sends the physical downlink control channel commands PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, or, to send to main control base station for the random access lead code resource of terminal distribution and/or PRACH resource, so that described main control base station sends the PDCCH order of C-RNTI scrambling; In described PDCCH order, carrying described slave base stations is random access lead code resource and/or the PRACH resource of terminal distribution, and described random access lead code is used at the community of described slave base stations initiating random access procedure;

Described slave base stations receives described terminal and sends random access lead code according to described random access lead code resource and/or PRACH resource;

The PDCCH of described slave base stations scheduling random access radio network temporary mark RA-RNTI scrambling, or, the accidental access response message for described terminal is sent to described main control base station, so that the PDCCH of described main control base station scheduling RA-RNTI scrambling; In described PDCCH, carry the accidental access response message for described terminal.

An accidental access method, comprising:

Main control base station receives random access lead code resource and/or the Physical Random Access Channel PRACH resource that slave base stations is terminal distribution, and send the physical down control command PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, in described PDCCH order, carrying described slave base stations is random access lead code resource and/or the PRACH resource of terminal distribution, and described random access lead code is used at the community of described slave base stations initiating random access procedure; And/or

Described main control base station receives the accidental access response message for described terminal that slave base stations is sent, and dispatches the PDCCH of random access radio network temporary mark RA-RNTI scrambling, carries the accidental access response message for described terminal in described PDCCH.

, comprising:

The first processing module, for in the community of main control base station or the community of slave base stations receive the physical downlink control channel commands PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, obtain random access lead code resource and/or the Physical Random Access Channel PRACH resource of the community of slave base stations described in described PDCCH order, described random access lead code is used at the community of described slave base stations initiating random access procedure;

The second processing module, sends random access lead code for described random access lead code resource and/or the PRACH resource getting according to described the first processing module;

The 3rd processing module, for in the community of main control base station or the community of described slave base stations monitor the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, obtain the accidental access response message that belongs to described terminal in described PDCCH; Wherein, the random access lead code that the described accidental access response message carrying in the PDCCH of the RA-RNTI scrambling receiving in the community of described main control base station is described slave base stations to be sent according to described terminal generates and sends to described main control base station.

, described base station is slave base stations, described slave base stations comprises:

The first processing module, for sending the physical downlink control channel commands PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, or, the community of main control base station will be sent to for the random access lead code resource of terminal distribution and/or PRACH resource, so that described main control base station sends the PDCCH order of C-RNTI scrambling; In described PDCCH order, carrying described slave base stations is random access lead code resource and/or the PRACH resource of terminal distribution, and described random access lead code is used at the community of described slave base stations initiating random access procedure;

The second processing module, sends random access lead code for receiving described terminal according to described random access lead code resource and/or PRACH resource;

The 3rd processing module, for dispatching the PDCCH of random access radio network temporary mark RA-RNTI scrambling, or, the accidental access response message for described terminal is sent to the community of described main control base station, so that the PDCCH of described main control base station scheduling RA-RNTI scrambling; In described PDCCH, carry the accidental access response message for described terminal.

, described base station is main control base station, described main control base station comprises:

The first forwarding module, for receiving random access lead code resource and/or the Physical Random Access Channel PRACH resource that slave base stations is terminal distribution, and send the physical down control command PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, in described PDCCH order, carrying described slave base stations is random access lead code resource and/or the PRACH resource of terminal distribution, and described random access lead code is used at the community of described slave base stations initiating random access procedure; And/or

The second forwarding module, for receiving the accidental access response message for described terminal that slave base stations is sent, and dispatch the PDCCH of random access radio network temporary mark RA-RNTI scrambling, in described PDCCH, carry the accidental access response message for described terminal.

, comprising:

Terminal sends random access lead code in the community of slave base stations;

Described terminal is monitored the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling in the community of described slave base stations, obtain the accidental access response message that belongs to described terminal in described PDCCH; Or, in the community of main control base station, monitor the PDCCH of RA-RNTI scrambling, obtain the accidental access response message that belongs to described terminal in described PDCCH, the described accidental access response message random access lead code that to be described slave base stations send according to described terminal generates and sends to described main control base station;

Described terminal sends scheduled transmission message in the community that sends described random access lead code;

Described terminal solves message in the cell detection competition that sends described random access lead code.

, comprising:

The random access lead code that slave base stations receiving terminal sends;

The random access lead code that described slave base stations sends according to described terminal generates the accidental access response message for described terminal, the physical downlink control channel PDCCH of scheduling random access radio network temporary mark RA-RNTI scrambling, or described accidental access response message is sent to main control base station, so that the PDCCH of described main control base station scheduling RA-RNTI scrambling; Wherein, in described PDCCH, carry the accidental access response message for described terminal;

Described slave base stations receives in the community that sends described lead code the scheduled transmission message that described terminal sends, and after random access contention solves, sends competition solve message in the community that sends described lead code.

, comprising:

Main control base station receives the accidental access response message that slave base stations is sent;

The physical downlink control channel PDCCH of described main control base station scheduling random access radio network temporary mark RA-RNTI scrambling, carries described accidental access response message in described PDCCH.

, comprising:

The first processing module, sends random access lead code for the community in slave base stations;

The second processing module, monitors the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling for the community in described slave base stations, obtain the accidental access response message that belongs to described terminal in described PDCCH; Or, in the community of main control base station, monitor the PDCCH of RA-RNTI scrambling, obtain the accidental access response message that belongs to described terminal in described PDCCH, the described accidental access response message random access lead code that to be described slave base stations send according to described terminal generates and sends to described main control base station;

The 3rd processing module, sends scheduled transmission message for the community sending described random access lead code;

The 4th processing module, solves message for the cell detection competition sending described random access lead code.

The first processing module, the random access lead code sending for receiving terminal;

The second processing module, for the random access lead code sending according to described terminal, generate the accidental access response message for described terminal, physical downlink control channel PDCCH in the cell scheduling random access radio network temporary mark RA-RNTI of described slave base stations scrambling, or described accidental access response message is sent to the community of main control base station, so that the physical downlink control channel PDCCH of described main control base station scheduling random access radio network temporary mark RA-RNTI scrambling; Wherein, in described PDCCH, carry the accidental access response message for described terminal;

The 3rd processing module, receives for the community sending described lead code the scheduled transmission message that described terminal sends;

The 4th processing module, after solving at random access contention, sends competition in the community that sends described lead code and solves message.

Receiver module, the accidental access response message sending for receiving the community of slave base stations;

Forwarding module, for dispatching the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, carries described accidental access response message in described PDCCH.

In sum, in the embodiment of the present invention, in the polymerization of many base stations, particularly carry under separated scene, the mode of coordinating by UE and SeNB direct interaction, or by the auxiliary mode of MeNB, realized the random access procedure between UE and SeNB, solved and supported the polymerization of many base stations particularly to carry the random access procedure of separated UE on SeNB, and then realized and the synchronizeing or obtain up-downgoing transfer resource from SeNB of SeNB.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly introduced, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is e-UTRAN network architecture schematic diagram in prior art;

Fig. 2 A is competition random access procedure schematic diagram of the prior art;

Fig. 2 B is non-competing random access procedure schematic diagram of the prior art;

Fig. 3 is hierarchical network deployment scenario schematic diagram of the prior art;

The non-competing random access procedure schematic diagram that Fig. 4 provides for the embodiment of the present invention;

The competition random access procedure schematic diagram that Fig. 5 provides for the embodiment of the present invention;

The random access procedure schematic diagram that Fig. 6 provides for the embodiment of the present invention one;

The random access procedure schematic diagram that Fig. 7 provides for the embodiment of the present invention two;

The random access procedure schematic diagram that Fig. 8 provides for the embodiment of the present invention three;

The random access procedure schematic diagram that Fig. 9 provides for the embodiment of the present invention four;

Figure 10 is the MAC RAR structural representation in the embodiment of the present invention;

The random access procedure schematic diagram that Figure 11 provides for the embodiment of the present invention five;

The random access procedure schematic diagram that Figure 12 provides for the embodiment of the present invention six;

The random access procedure schematic diagram that Figure 13 provides for the embodiment of the present invention seven;

The random access procedure schematic diagram that Figure 14 provides for the embodiment of the present invention eight;

One of terminal structure schematic diagram that Figure 15 provides for the embodiment of the present invention;

One of architecture of base station schematic diagram that Figure 16 provides for the embodiment of the present invention;

Two of the architecture of base station schematic diagram that Figure 17 provides for the embodiment of the present invention;

Two of the terminal structure schematic diagram that Figure 18 provides for the embodiment of the present invention;

Three of the architecture of base station schematic diagram that Figure 19 provides for the embodiment of the present invention;

Four of the architecture of base station schematic diagram that Figure 20 provides for the embodiment of the present invention.

Embodiment

The embodiment of the present invention is applicable to the polymerization of many base stations, particularly carries separated scene.

Fig. 3 shows a kind of typical layered network architecture.As shown in Figure 3, macro base station (note is Macro eNB) provides basis to cover, lower powered local node (being labeled as Small cell in figure) provides focus to cover, between local node and Macro eNB, have data and/or signaling interface (can be wired or wireless interface), UE can be operated under Macro eNB or local node.The cell coverage area of controlling due to local node is little, and the UE of service is few, so be connected to the UE of local node, often can obtain better service quality.Therefore,, when being connected to the UE of Macro eNB and entering the coverage of the corresponding community of local node, can transfer to the service that local node provides to obtain local node; When UE is during away from the corresponding cell coverage area of local node, need to transfer to the community that Macro eNB controls, to keep wireless connections.

The network architecture shown in Fig. 2 can support carrying separated.Under carrying separation scene, in Macro eNB community and Small cell community overlapping covered, support the separated UE of carrying to may be simultaneously operated under Macro eNB and Small Cell, use the resource of a plurality of base stations.

Especially, when UE supports CA(Carrier Aggregation under SeNB, carrier aggregation) time, under SeNB, can there is one and the similar community of MeNB PCell (hereinafter to be referred as SeNB PCell) in UE, this community possesses the function of similar MeNB PCell, supported data transmission, dispose PUCCH(Physical Uplink Control CHannel, physical uplink control channel) etc., but can not be as per UE(according to UE) the community that maintains of RRC link use.

It has been generally acknowledged that: under many base stations polymerization scene of (comprising the base station polymerization that carrying is separated), in a plurality of base stations of UE polymerization, using and provide the base station of grand covering Macro eNB as main control base station Master eNB(or claim MeNB), using and provide the Small Cell base station of focus covering as Secondary eNB(or claim SeNB).Take below that grand covering to be provided and to maintain the base station being connected with UE RRC be MeNB, other base stations of UE polymerization are that SeNB is example explanation.

The embodiment of the present invention is particularly carried separated scene for the polymerization of many base stations, has proposed non-competing accidental access method and competitive random access method, realizes terminal in the random access of slave base stations.

In conjunction with accessing at random, initiate scene and carrying separated transmission framework, conventionally in following several possibility situations, need to trigger the random access procedure of UE on SeNB community:

-according to load balancing, UE measurement, reporting as MeNB, judgement need to be separated to the part carrying of supporting the UE that carrying is separated when managing on selected SeNB and transmitting, and MeNB triggers the carrying separation process of this UE and selected SeNB.UE is according to the carrying detach message of MeNB notice, and initiating random access procedure on corresponding SeNB, to realize the uplink synchronous with SeNB;

-according to load balancing, UE measurement, report when SeNB telegon (being small cell coordinator), judgement need to be separated to the part carrying of supporting the UE that carrying is separated when managing on another SeNB and transmitting, this UE of base station triggers of SeNB master controller notice UE work at present and the carrying separation process of selected SeNB.UE is according to the carrying detach message that receives, and initiating random access procedure on corresponding SeNB, to realize the uplink synchronous with SeNB.Wherein, when small cell cluster(small-cell cluster) do not belong to any MeNB coverage, and support, in the separated situation of carrying, to introduce small cell coordinator.Small cell coordinator is used for its coordination of descending all small cell, route, management etc., can be an independently entity, can be also a logical functional entity;

-carry separated UE in up with SeNB community UL() desynchronizing state, and the UE that is separated in the upper transmission of SeNB is when carrying corresponding downlink data and arriving;

-carry separated UE in SeNB community UL desynchronizing state, and the UE that is separated in the upper transmission of SeNB is when carrying corresponding upstream data and arriving;

-carry separated UE in SeNB community, not configure D-SR(Dedicated Scheduling Request, specific schedule request) resource or D-SR transmission surpasses maximum transmission times, and the UE that is separated in the upper transmission of SeNB is when carrying corresponding upstream data and arriving.

In above-mentioned several situation, there is in two kinds of situations base station cannot know that UE SeNB community RA demand or SeNB community UL scheduling of resource demand: UE are when SeNB cell uplink step-out and upstream data reach, or when UE upstream data arrives but do not configure the D-SR of corresponding SeNB or D-SR transmission and surpass maximum transmission times.To both of these case, need UE initiatively initiating random access procedure, i.e. CBRA.Under other SeNB RA scenes, because SeNB has prior information, conventionally adopt CFRA process (when competition RA resource is inadequate, can indicate UE to initiate CBRA by base station).

Below in conjunction with accompanying drawing, respectively non-competing accidental access method and competitive random access method are described.

Referring to Fig. 4, the non-competing random access procedure schematic diagram providing for the embodiment of the present invention.As shown in the figure, this flow process can comprise:

Step 401:SeNB sends the PDCCH order of C-RNTI scrambling, or, preamble resource and/or the PRACH resource of for UE, distributing are sent to MeNB, so that MeNB sends the PDCCH order of C-RNTI scrambling; In described PDCCH order, carry preamble resource and/or PRACH resource that described SeNB distributes for this UE, this preamble is used at the community of described SeNB initiating random access procedure.

Accordingly, UE in the community of MeNB or the community of SeNB receive the PDCCHorder of C-RNTI scrambling, obtain preamble resource and/or the PRACH resource of the SeNB community of indicating in described PDCCH order.

Step 402:UE sends preamble according to described preamble resource and/or PRACH resource.

Step 403: described SeNB receives after this preamble of UE transmission, the PDCCH of scheduling RA-RNTI scrambling, or, the accidental access response message for this UE is sent to MeNB, so that the PDCCH of MeNB scheduling RA-RNTI scrambling; In described PDCCH, carry the accidental access response message for this UE.

Accordingly, this UE in the community of MeNB or the community of SeNB monitor the PDCCH of RA-RNTI scrambling, obtain the accidental access response message that belongs to this UE in this PDCCH.

In a kind of optimal way, in the PDCCH order that SeNB or MeNB send, also carry the identification information of the community of the SeNB corresponding with preamble resource and/or PRACH resource, so that UE sends preamble according to community corresponding to being identified at of the community of this SeNB.Accordingly, in step 401, UE receives after the PDCCH order of C-RNTI scrambling in the community of MeNB, obtains preamble resource and/or PRACH resource in this PDCCHorder, and the sign of the community of the SeNB corresponding with this preamble resource and/or PRACH resource; In step 402, this UE, according to the sign of the community of this preamble resource and/or PRACH resource and this SeNB, sends preamble in the community of corresponding SeNB.

By above-mentioned preferred implementation, can make the SeNB cell ID of UE in can the PDCCH order of basis, at this, identify corresponding community (being SeNB community) and send preamble, thereby trigger the random access procedure on SeNB.

In a kind of optimal way, in step 403, UE can judge whether accidental access response message belongs to this UE in the following manner:

Mode one: the sign of portability SeNB community in RN-RNTI.Accordingly, UE obtains cell ID from RA-RNTI, if this cell ID is identical with the sign of the community of transmission preamble, and the preamble detecting is identical with the preamble that this UE sends, and the accidental access response message in the PDCCH of RA-RNTI scrambling belongs to this UE;

Mode two: portability C-RNTI in accidental access response message, this C-RNTI is the C-RNTI of this UE in the community that sends preamble.Accordingly, UE obtains C-RNTI from accidental access response message, if this C-RNTI is the C-RNTI of this UE in the community that sends preamble, this accidental access response message belongs to this UE.

By above-mentioned preferred implementation, can guarantee that UE can correctly receive one's own accidental access response message, thereby can be successfully completed random access procedure.

In a kind of optimal way, in step 403, UE can monitor at the public search space of the community of MeNB the PDCCH of RA-RNTI scrambling.

In a kind of optimal way, in step 403, SeNB can be at the public search space of the PCell of this SeNB, or at the public search space that sends the community of preamble, the PDCCH of scheduling RA-RNTI scrambling.When the public search space that sends the community of preamble is dispatched PDCCH, in RA-RNTI, can carry the cell ID of SeNB.Accordingly, UE can be at the public search space of the PCell of SeNB, or at the public search space that sends the community of preamble, monitors the PDCCH of RA-RNTI scrambling.

Flow process by Fig. 4 can be found out, in the polymerization of many base stations, particularly carry under separated scene, the mode of coordinating by UE and SeNB direct interaction, or by the auxiliary mode of MeNB, realized the random access procedure between UE and SeNB, solved and supported the polymerization of many base stations particularly to carry the non-competing random access procedure of separated UE on SeNB, and then realized and the synchronizeing or obtain up-downgoing transfer resource from SeNB of SeNB.

Referring to Fig. 5, the competition random access procedure schematic diagram providing for the embodiment of the present invention.As shown in the figure, this flow process can comprise:

Step 501:UE sends preamble in the community of SeNB.

Step 502: the preamble that this SeNB sends according to this UE generates the accidental access response message for this UE, and at the PDCCH of the cell scheduling RA-RNTI of this SeNB scrambling, or this accidental access response message is sent to MeNB, so that the PDCCH of MeNB scheduling RA-RNTI scrambling.In described PDCCH, carry the accidental access response message for this UE.

Accordingly, UE in the community of this SeNB or the community of MeNB monitor the PDCCH of RA-RNTI scrambling, obtain the accidental access response message that belongs to this UE in this PDCCH.

Step 503: this UE sends scheduled transmission message in the community that sends this preamble.

Step 504:SeNB receives in the community that sends this preamble the scheduled transmission message sending, and after random access contention solves, sends competition solve message in the community that sends this preamble.Accordingly, this UE solves message in the cell detection competition that sends this preamble.

In a kind of optimal way, UE, before the community of SeNB sends preamble, also can comprise a kind of or combination in following processing operation:

(1) UE selects preamble in specifying preamble group, and the preamble in described appointment preamble group is exclusively used in UE and initiates the use of competition random access procedure at SeNB.Accordingly, in step 501, UE sends in the community of SeNB the preamble selecting from this appointment preamble group.

(2) UE selects PRACH in specifying PRACH group, and the PRACH in described appointment PRACH group is exclusively used in UE and initiates the use of competition random access procedure at SeNB.Accordingly, in step 501, UE, according to the PRACH selecting from specify PRACH group, sends preamble in the community of SeNB.

(3) UE selects to specify preamble format(pramble form) and the PRACH corresponding with described appointment preamble format, described appointment preamble format is exclusively used in UE and uses at the community of SeNB initiation competition random access procedure.Accordingly, in step 501, UE, according to the described appointment preamble format selecting and the PRACH corresponding with described appointment preamble format, sends preamble in the community of SeNB.

By above-mentioned optimal way, can make SeNB pass through specific preamble, specific PRACH or specific preamble format, judging this is the competition random access procedure that UE initiates on SeNB community, thereby the competition random access procedure of this UE is processed.

In a kind of optimal way, the sign of portability SeNB community in RN-RNTI.Accordingly, in step 502, UE judges whether accidental access response message belongs to this UE in the following manner: from RA-RNTI, obtain cell ID, if this cell ID is identical with the sign of the community of transmission preamble, and the preamble detecting is identical with the preamble that this UE sends, and the accidental access response message in PDCCH belongs to this UE.By above-mentioned preferred implementation, can guarantee that UE can correctly receive one's own accidental access response message, thereby can be successfully completed random access procedure.

In a kind of optimal way, in step 502, UE can monitor at the public search space of the PCell of MeNB the PDCCH of RA-RNTI scrambling.

In a kind of optimal way, in step 502, UE can be at the public search space of the PCell of SeNB, or at the public search space that sends the community of preamble, monitors the PDCCH of RA-RNTI scrambling.

Flow process by Fig. 5 can be found out, in the polymerization of many base stations, particularly carry under separated scene, the mode of coordinating by UE and SeNB direct interaction, or by the auxiliary mode of MeNB, realized the competition random access procedure between UE and SeNB, solved and supported the polymerization of many base stations particularly to carry the random access procedure of separated UE on SeNB, and then realized and the synchronizeing or obtain up-downgoing transfer resource from SeNB of SeNB.

For clearer, the embodiment of the present invention is described, below by embodiment mono-, embodiment bis-, embodiment tri-and embodiment tetra-, the non-competing random access procedure that the embodiment of the present invention is provided is described in detail, by embodiment five, embodiment six, embodiment seven and embodiment eight, the competition random access procedure that the embodiment of the present invention is provided is described in detail.

Embodiment mono-

When needs UE is during at SeNB initiating random access procedure, can force UE at SeNB community CSS, to monitor (take have the scene of MeNB be example).

As shown in Figure 6, when network-triggered UE CFRA process, this CFRA process can comprise:

Step 601: send random access indication (Msg0).

The selected UE of SeNB sends Preamble resource and/or the PRACH resource of Msg1, and on SeNB community, dispatches UE random access procedure by the PDCCH order of C-RNTI scrambling.SeNB community herein can be SeNB PCell, or the dispatching cell of preamble transmission community, or preamble sends community (preamble sends community and refers to the community that sends preamble, as follows).

Step 602: send Preamble code (Msg1).

UE receives after PDCCH order, according to the Preamble resource of configuration and/or PRACH resource, sends preamble.Further, UE can send the PDCCH of the CSS of community or the CSS of SeNB PCell monitoring RA-RNTI scrambling at preamble, to obtain RAR message.

Step 603: receive RAR(Msg2).

SeNB receives and decodes after the preamble in this PRACH resource, generates RAR message, and on the community sending at this preamble or SeNB PCell, the PDCCH by RA-RNTI scrambling dispatches this UE SeNB RAR.

For distinguishing UE, can adopt a kind of in following several mode:

Mode one: indicate the SeNB cell identity information that sends Preamble by RA-RNTI.UE detects whether there is the SeNBRAR for oneself on the CSS of SeNB PCell or preamble transmission community.When UE detects RAR on SeNB PCell, if the community of the RA-RNTI detecting indication is the community of this UE transmission preamble, and the preamble detecting is identical with the preamble that this UE sends, confirm that this SeNB RAR is for this UE, UE obtains SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI from this SeNB RAR.While detecting RAR on the community that UE sends at preamble, if the preamble detecting is identical with the preamble that this UE sends, confirm that this SeNB RAR is for this UE, UE obtains SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI from this SeNB RAR.

Mode two: in RAR, TC-RNTI is distributed to C-RNTI with the UE C-RNTI(polymerization base station United Dispatching of corresponding SeNB, the C-RNTI of the corresponding SeNB of UE is that MeNB PCell is not yet assigned to the C-RNTI that other UE is used.In addition, the preamble resource coordination configuration between MeNB and SeNB, the non-competing preamble resource of the pre-SeNB of the non-competing preamble resource of MeNB staggers; MeNB and SeNB competition preamble assembly is put overlapping) replace, UE, according to the C-RNTI in SeNB RAR whether for oneself, obtains the information such as TAC, UL-grant that SeNB is its configuration, TC-RNTI.Figure 10 shows a kind of MAC RAR message format.

Mode three: adopt the preamble resource coordination configuration between SeNB Xia Ge community, the non-competing preamble resource of each SeNB community staggers, the overlapping mode of competition preamble resource distribution.

Further, in many base stations, share Small cell(SeNB) scene under, UE and SeNB select main Macro eNB as the auxiliary MeNB of the random access of SeNB.In this case, need to be by main MacroeNB sign notice to UE, also need to be between a plurality of base stations of polymerization the sign of mutual main Macro eNB.

Embodiment bis-

When needs UE is during at SeNB initiating random access procedure, can force UE at SeNB community CSS, to detect the CFRA of the scene that has MeNB (take be example).

As shown in Figure 7, when network-triggered UE CFRA process, this CFRA process can comprise:

Step 701: send random access indication (Msg0).

The selected UE of SeNB sends Preamble resource and/or the PRACH resource of Msg1, by information notifications such as UE sign, selected preamble resource, cell IDs to MeNB.By MeNB, in MeNB community, (as MeNB PCell) dispatches UE random access procedure with the PDCCH order of C-RNTI scrambling.In Msg0, also need to carry the information such as cell ID, SeNB sign of the selected preamble of transmission.

Step 702: send Preamble code (Msg1).

UE receives after PDCCH order, in the PRACH resource of selected SeNB community, sends selected preamble.Further, UE sends the PDCCH of the CSS of community or the CSS of SeNB PCell monitoring RA-RNTI scrambling at preamble, to obtain RAR message.

Step 703: receive RAR(Msg2).

For distinguishing UE, can adopt a kind of in following several mode:

Mode one: indicate the SeNB cell identity information that sends Preamble by RA-RNTI.UE monitors whether there is the SeNBRAR for oneself on the CSS of SeNB PCell or preamble transmission community.When UE detects RAR on SeNB PCell, if the community of the RA-RNTI detecting indication is the community of this UE transmission preamble, and the preamble detecting is identical with the preamble that this UE sends, confirm that this SeNB RAR is for this UE, UE obtains SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI from this SeNB RAR.While detecting RAR on the community that UE sends at preamble, if the preamble detecting is identical with the preamble that this UE sends, confirm that this SeNB RAR is for this UE, UE obtains SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI from this SeNB RAR.

Embodiment tri-

When needs UE is when SeNB initiates CFRA process, UE can send in SeNB community Preamble, and on MeNB PCell, receives the SeNB RAR of the PDCCH scheduling of RA-RNTI scrambling.(take have the carrying separation scene of MeNB be example).

As shown in Figure 8, when network-triggered UE SeNB CFRA process, this CFRA process can comprise:

Step 801: send random access indication (Msg0).

The selected UE of SeNB sends Preamble resource and/or the PRACH resource of Msg1, and the PDCCH order by C-RNTI scrambling in SeNB community (as SeNB PCell or preamble send the dispatching cell of community, or preamble sends community) upper scheduling UE random access procedure.

Step 802: send Preamble code (Msg1).

UE receives after PDCCH order, in the PRACH resource of selected SeNB community, sends selected preamble.Further, UE can open RAR window after preamble sends 2ms, and (SeNBRAR window length needs expansion, the minimum value of widow is 2ms+backhaul time delay, maximum length can reach 10ms+backhaul time delay), prepare to receive the SeNB RAR message that may send in MeNB community.

Step 803: receive RAR(Msg2).

SeNB sends community at selected preamble and receives after selected preamble, generates RAR and RAR prefix, and UE sign, preamble are sent to the information such as cell ID, RAR, RAR prefix and notify to MeNB.MeNB PCell receives after the information of SeNB notice, passes through the UE SeNB RAR of the PDCCH scheduling of RA-RNTI scrambling on MeNB PCell.

For distinguishing UE, can adopt a kind of in following several mode:

Mode one: by RA-RNTI, indicate the SeNB cell identity information that sends Preamble, as, RA-RNTI=1+t_id+10*f_id+100*cell_id;

Mode two: in RAR, TC-RNTI is distributed to C-RNTI with the UE C-RNTI(polymerization base station United Dispatching of corresponding SeNB, the C-RNTI of the corresponding SeNB of UE is that MeNB PCell is not yet assigned to the C-RNTI that other UE is used.In addition, the preamble resource coordination configuration between MeNB and SeNB, the non-competing preamble resource of the pre-SeNB of the non-competing preamble resource of MeNB staggers; MeNB and SeNB competition preamble assembly are put overlapping) replace.Figure 10 shows a kind of MAC RAR message format.

Mode three: can adopt the preamble resource coordination configuration between MeNB and SeNB, the non-competing preamble resource of MeNB and the non-competing preamble resource of SeNB stagger, and the non-competing preamble resource of Xia Ge community, this base station staggers.Overlapping mode is put in MeNB and SeNB competition preamble assembly.

UE detects the SeNB RAR whether having for oneself on the CSS of MeNB PCell, if the community of the RA-RNTI detecting indication is the community of this UE transmission preamble, and the preamble detecting is identical with the preamble that this UE sends, confirm that this SeNB RAR is for this UE, UE obtains SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI from this SeNB RAR.

Embodiment tetra-

As shown in Figure 9, when network-triggered UE SeNB CFRA process, this CFRA process can comprise:

Step 901: send random access indication (Msg0).

The selected UE of eNB sends Preamble resource and/or the PRACH resource of Msg1, by information notifications such as UE sign, selected preamble resource, cell IDs to MeNB.By MeNB, in MeNB community, (as MeNB PCell) dispatches UE random access procedure with the PDCCH order of C-RNTI scrambling.In Msg0, also need to carry the information such as cell ID, SeNB sign of the selected preamble of transmission.

Step 902: send Preamble code (Msg1).

Step 903: receive RAR(Msg2).

For distinguishing UE, can adopt a kind of in following several mode:

Embodiment five

When needs UE is when SeNB initiates CBRA process, UE sends Preamble(and select preamble from Random Access Preambles group C in SeNB community), and on MeNB PCell, receive the SeNB RAR of the PDCCH scheduling of RA-RNTI scrambling.UE take at SeNB community sending/receiving Msg3/Msg4(that to have the carrying separation scene of MeNB be example).

In the present embodiment, on the basis of the Random of existing corresponding SeNB Access Preambles group A and Random Access Preambles group B, introduce and in new Random AccessPreambles group(the present embodiment, be called Random Access Preambles group C).RandomAccess Preambles group C can notice to UE, also can notify to UE in carrying separation process after carrying separation completes.Random Access Preambles group C is exclusively used in and supports the separated UE of carrying to initiate CBRA process at SeNB.Between each base station of polymerization, guarantee concrete preamble resource in consistent packet mode and grouping.When needs trigger SeNB RA process, UE or SeNB select preamble resource at Random Access Preambles group C.

As shown in figure 11, UE can comprise in the process of SeNB community initiation SeNB CBRA:

Step 1101: send Preamble code (Msg1)

When supporting that the separated UE of carrying triggers SeNB CBRA process, UE selects preamble resource at Random AccessPreambles group C, selects PRACH resource in SeNB community, and the PRACH resource of selecting with oneself sends the preamble selecting.Further, UE can open RAR window after preamble sends 2ms, and (SeNB RAR window length needs expansion, the minimum value of widow is 2ms+backhaul time delay, maximum length can reach 10ms+backhaul time delay), prepare to receive the SeNB RAR message that may send in MeNB community.

Step 1102: receive RAR(Msg2)

SeNB receives and decodes after the preamble in this PRACH resource, the Random Access Preambles group of judgement preamble ownership, and whether generate the RAR information for this UE, if Random Access Preambles group is C and judges the corresponding RAR of generation, SeNB generates RAR information, RAR head, and preamble is sent to cell ID, RAR, RAR, and first-class information is notified to MeNB.MeNB PCell receives after the information of SeNB notice, passes through the UE SeNB RAR of the PDCCH scheduling of RA-RNTI scrambling on MeNB PCell.

Can adopt the mode identical with the mode one providing in embodiment tetra-or mode three to distinguish UE, such as can embody the SeNB cell identity information that sends Preamble in RA-RNTI.UE detects the SeNB RAR whether having for oneself on the CSS of MeNB PCell, to obtain the information such as TAC, UL-grant that SeNB is its configuration.

Step 1103～1104:Msg3 sends and Msg4(competition solves)

UE receives and decodes (Msg2 whether successfully receives discriminant approach and current mechanism is similar) after SeNB Msg2 message, on the SeNB community that sends peamble, send Msg3 message, in message, at least carry the C-RNTI of the UE of corresponding SeNB, this C-RNTI is that network is notified to UE and used at SeNB when carrying is separated.UE sends after Msg3, and the competition of opening corresponding SeNB community solves timer, and the SeNB community that starts to send at preamble receives SeNB RA Msg4 message.When UE listens to SeNB, send the PDCCH of C-RNTI scrambling that send, corresponding SeNB on community at UE preamble, UE thinks that SeNB CBRA is successful, completes competition and solves.

In addition, in many base stations, share Small cell(SeNB) scene under, UE and SeNB select main Macro eNB as the auxiliary MeNB of SeNB RA.In this case, need to be by main Macro eNB sign notice to UE, also need to be between a plurality of base stations of polymerization the sign of mutual main Macro eNB.

Embodiment six

When needs UE is when SeNB initiates CBRA process, UE sends Preamble(and is supporting polymerization UE in many base stations to select PRACH resource in special-purpose PRACH resource group B in SeNB community), and on MeNB PCell, receive the SeNB RAR of the PDCCH scheduling of RA-RNTI scrambling.UE take at SeNB community sending/receiving Msg3/Msg4(that to have the carrying separation scene of MeNB be example).

In the present embodiment, introduce the mode of the PRACH resource grouping of corresponding SeNB,, to existing PRACH running time-frequency resource grouping, part PRACH resource (as PRACH resource group A) is for traditional RA process, and other PRACH resources (as PRACH resource group B) are exclusively used in supports the separated UE of carrying at SeNB, to initiate the process of RA.The grouping information of PRACH resource can notice to UE, also can be notified to UE in carrying separation process after carrying separation completes.Between each base station of polymerization, guarantee concrete PRACH resource in consistent packet mode and grouping.When needs trigger SeNB RA process, UE or SeNB select PRACH resource in suitable PRACH resource grouping (as PRACH resource group B).

As shown in figure 12, UE can comprise in the process of SeNB community initiation SeNB CBRA:

Step 1201: send Preamble code (Msg1)

When supporting that the separated UE of carrying triggers SeNB CBRA process, UE selects PRACH resource in PRACH resource group B, and on SeNB, utilizes the PRACH resource of selecting from PRACH resource group B to send the random preamble code of selecting.Further, UE can open RAR window after preamble sends 2ms, and (SeNB RAR window length needs expansion, the minimum value of widow is 2ms+backhaul time delay, maximum length can reach 10ms+backhaul time delay), prepare to receive the SeNB RAR message that may send in MeNB community.

Step 1202: receive RAR(Msg2)

SeNB receives and decodes after the preamble in this PRACH resource, the PRACH resource grouping of judgement PRACH resource ownership, and whether generate the RAR information for this UE, if PRACH resource be grouped into group B(be exclusively used in support the separated UE of carrying at SeNB, to initiate the resource group of RA process) and judge and generate corresponding RAR, SeNB generates RAR information, RAR head, and the information such as cell ID, RAR, RAR prefix that preamble is sent are notified to MeNB.MeNB PCell receives after the information of SeNB notice, passes through the UESeNB RAR of the PDCCH scheduling of RA-RNTI scrambling on MeNB PCell.

Step 1203～1204:Msg3 sends and Msg4(competition solves)

UE receives and decodes (Msg2 whether successfully receives discriminant approach and current mechanism is similar) after SeNB Msg2 message, on the SeNB community that sends peamble, sends Msg3 message, at least carries the C-RNTI of the UE of corresponding SeNB in message.Send after Msg3, the competition that UE opens corresponding SeNB community solves timer, and the SeNB community that starts to send at preamble receives SeNB RA Msg4 message.When UE listens to SeNB, send the PDCCH of C-RNTI scrambling that send, corresponding SeNB on community at UE preamble, UE thinks that SeNB CBRA is successful, completes competition and solves.

Embodiment seven

When needs UE is when SeNB initiates CBRA process, UE sends Preamble(and is supporting polymerization UE in many base stations to select PRACH resource corresponding to new preamble format in SeNB community), and on MeNB PCell, receive the SeNB RAR of the PDCCH scheduling of RA-RNTI scrambling.UE take at SeNB community sending/receiving Msg3/Msg4(that to have the carrying separation scene of MeNB be example).

In the present embodiment, introduced new lead code form (new preamble format), for supporting that carry separated UE initiates CBRA process on SeNB.To frame structure 1, new preamble format can corresponding PRACH configuration index(PRACH configuration index) one or more values in value 30,46,60,61,62.To frame structure 2, the one or more values of new preamble format in can corresponding PRACHconfiguration index value 58～63.When needs trigger SeNB RA process, UE or SeNB select the PRACH that new preamble format is corresponding to initiate SeNB RA process.

As shown in figure 13, the SeNB CBRA process that UE initiates in SeNB community can comprise:

Step 1301: send Preamble code (Msg1)

When supporting that the separated UE of carrying triggers SeNB CBRA process, UE selects the PRACH resource that new preamble format is corresponding on SeNB community, the random competition preamble resource of selecting corresponding SeNB community sends preamble in selected PRACH resource.。Further, UE can open RAR window after preamble sends 2ms, and (SeNB RAR window length needs expansion, the minimum value of widow is 2ms+backhaul time delay, maximum length can reach 10ms+backhaul time delay), prepare to receive the SeNB RAR message that may send in MeNB community.

Step 1302: receive RAR(Msg2)

SeNB receives and decodes after the preamble in this PRACH resource, judges whether to generate the RAR information for this UE, and if so, SeNB generates RAR information, RAR head, and the information such as cell ID, RAR, RAR prefix that preamble is sent are notified to MeNB.MeNB PCell receives after the information of SeNB notice, passes through the UESeNB RAR of the PDCCH scheduling of RA-RNTI scrambling on MeNB PCell.

Can adopt the mode identical with the mode one providing in embodiment tetra-or mode three to distinguish UE, such as can embody the SeNB cell identity information that sends Preamble in RA-RNTI.UE detects the SeNB RAR whether having for oneself on the CSS of MeNB PCell, to obtain SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI.

Step 1303～1304:Msg3 sends and Msg4(competition solves)

UE receives and decodes after SeNB Msg2 message, on the SeNB community that sends peamble, sends Msg3 message, at least carries the C-RNTI of the UE of corresponding SeNB in message.Send after Msg3, the competition that UE opens corresponding SeNB community solves timer, and the SeNB community that starts to send at preamble receives SeNB RA Msg4 message.When UE listens to SeNB, send the PDCCH of C-RNTI scrambling that send, corresponding SeNB on community at UE preamble, UE thinks that SeNB CBRA is successful, completes competition and solves.

Embodiment eight

When needs UE is during at SeNB initiating random access procedure, can force UE at SeNB community CSS, to detect (take have the scene of MeNB be example).

As shown in figure 14, the SeNB CBRA process that UE initiates in SeNB community can comprise:

Step 1401: send Preamble code (Msg1).

When needs UE initiatively triggers CBRA, UE carries out selecting on RA community PRACH resource and Preamble resource at needs.Further, the CSS that UE sends community or SeNB PCell at preamble monitors the PDCCH of RA-RNTI scrambling, to obtain RAR message.

Step 1402: receive RAR(Msg2).

SeNB receives and decodes after the preamble in this PRACH resource, generates RAR message, and on the community sending at this preamble or SeNB PCell, the PDCCH by RA-RNTI scrambling dispatches this UE SeNB RAR.Can adopt the mode identical with the mode one providing in embodiment bis-or mode three to distinguish UE, such as can embody the SeNB cell identity information that sends Preamble in RA-RNTI.UE detects the SeNB RAR whether having for oneself on the CSS of MeNB PCell, if the community of the RA-RNTI detecting indication is the community of this UE transmission preamble, and the preamble detecting is identical with the preamble that this UE sends, confirm that this SeNB RAR is for this UE, UE obtains SeNB for information such as TAC, the UL-grant of its configuration, TC-RNTI from this SeNB RAR.

Step 1403～1404:Msg3 sends and Msg4(competition solves)

In sum, in the embodiment of the present invention, in the polymerization of many base stations, particularly carry under separated scene, the mode of coordinating by UE and SeNB direct interaction, or by the auxiliary mode of MeNB, realized the random access procedure between UE and SeNB, solved and supported the polymerization of many base stations particularly to carry the random access procedure of separated UE on SeNB, and then realized and the synchronizeing and obtain uplink transmission resource from SeNB of SeNB.

Technical conceive based on identical, the embodiment of the present invention also provides the structure of terminal and base station.Terminal shown in Figure 15, and the base station shown in Figure 16 and Figure 17, can be applicable to the non-competing random access procedure that above-described embodiment provides.Terminal described in Figure 18, and the base station shown in Figure 19 and Figure 20, can be applicable to the competition random access procedure that above-described embodiment provides.

As shown in figure 15, this terminal can comprise:

The first processing module 1501, for in the community of main control base station or the community of slave base stations receive the physical downlink control channel commands PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, obtain random access lead code resource and/or the Physical Random Access Channel PRACH resource of the community of slave base stations described in described PDCCH order, described random access lead code is used at the community of described slave base stations initiating random access procedure;

The second processing module 1502, sends random access lead code for described random access lead code resource and/or the PRACH resource getting according to described the first processing module;

The 3rd processing module 1503, for in the community of main control base station or the community of described slave base stations monitor the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, obtain the accidental access response message that belongs to described terminal in described PDCCH; Wherein, the random access lead code that the described accidental access response message carrying in the PDCCH of the RA-RNTI scrambling receiving in the community of described main control base station is described slave base stations to be sent according to described terminal generates and sends to described main control base station.

Concrete, the first processing module 1501 can receive in the community of main control base station after the PDCCH order of C-RNTI scrambling, obtain random access lead code resource and/or PRACH resource in described PDCCH order, and the sign of the community of the described slave base stations corresponding with described random access lead code resource and/or PRACH resource; The sign of the described random access lead code resource that the second processing module 1502 can get according to described the first processing module and/or the community of PRACH resource and described slave base stations, sends random access lead code in the community of corresponding slave base stations.

Concrete, the 3rd processing module 1503 can judge whether accidental access response message belongs to described terminal in the following manner:

From described RA-RNTI, obtain cell ID, if described cell ID is identical with the sign of the community of transmission random access lead code, and the random access lead code detecting is identical with the described random access lead code that described terminal sends, and the accidental access response message in described PDCCH belongs to described terminal; Or, from described accidental access response message, obtain C-RNTI, if described C-RNTI is the C-RNTI of described terminal in the community that sends described random access lead code, described accidental access response message belongs to described terminal.

Concrete, the first processing module 1501 can be monitored the PDCCH of RA-RNTI scrambling at the public search space of the main plot of described main control base station.

Concrete, the first processing module 1501 can be at the public search space of the main plot of described slave base stations, or monitors the PDCCH of RA-RNTI scrambling at the public search space that sends the community of described random access lead code.

As shown in figure 16, this base station can be SeNB, and this base station can comprise:

The first processing module 1601, for sending the physical downlink control channel commands PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, or, the community of main control base station will be sent to for the random access lead code resource of terminal distribution and/or PRACH resource, so that described main control base station sends the PDCCH order of C-RNTI scrambling; In described PDCCH order, carrying described slave base stations is random access lead code resource and/or the PRACH resource of terminal distribution, and described random access lead code is used at the community of described slave base stations initiating random access procedure;

The second processing module 1602, sends random access lead code for receiving described terminal according to described random access lead code resource and/or PRACH resource;

The 3rd processing module 1603, for dispatching the PDCCH of random access radio network temporary mark RA-RNTI scrambling, or, the accidental access response message for described terminal is sent to the community of described main control base station, so that the PDCCH of described main control base station scheduling RA-RNTI scrambling; In described PDCCH, carry the accidental access response message for described terminal.

Concrete, in described PDCCH order, also carry the sign of the community of the slave base stations corresponding with described random access lead code resource and/or PRACH resource, so that described terminal sends random access lead code according to community corresponding to being identified at of the community of described slave base stations.

Concrete, in described RA-RNTI, carry the sign of the community of described slave base stations; And/or, in described accidental access response message, carrying C-RNTI, described C-RNTI is the C-RNTI of described terminal in the community that sends described random access lead code.

Concrete, the 3rd processing module 1603 can be in the main plot of described slave base stations or in the community that sends described random access lead code, the PDCCH of scheduling RA-RNTI scrambling.

As shown in figure 17, this base station can be MeNB, and this base station can comprise:

The first forwarding module 1701, for receiving random access lead code resource and/or the Physical Random Access Channel PRACH resource that slave base stations is terminal distribution, and send the physical down control command PDCCH order of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI scrambling, in described PDCCH order, carrying described slave base stations is random access lead code resource and/or the PRACH resource of terminal distribution, and described random access lead code is used at the community of described slave base stations initiating random access procedure; And/or

The second forwarding module 1702, for receiving the accidental access response message for described terminal that slave base stations is sent, and dispatch the PDCCH of random access radio network temporary mark RA-RNTI scrambling, in described PDCCH, carry the accidental access response message for described terminal.

Concrete, in described PDCCH order, also carry the sign of the community of the slave base stations corresponding with described random access lead code resource and/or PRACH resource, the sign of the community of described slave base stations is that described slave base stations sends to described main control base station, so that described terminal sends random access lead code according to community corresponding to being identified at of the community of described slave base stations.

Concrete, the second forwarding module 1702 can send in the main plot of described main control base station the PDCCH of RA-RNTI scrambling.

As shown in figure 18, this terminal can comprise:

The first processing module 1801, sends random access lead code for the community in slave base stations;

The second processing module 1802, monitors the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling for the community in described slave base stations, obtain the accidental access response message that belongs to described terminal in described PDCCH; Or, in the community of main control base station, monitor the PDCCH of RA-RNTI scrambling, obtain the accidental access response message that belongs to described terminal in described PDCCH, the described accidental access response message random access lead code that to be described slave base stations send according to described terminal generates and sends to described main control base station;

The 3rd processing module 1803, sends scheduled transmission message for the community sending described random access lead code;

The 4th processing module 1804, solves message for the cell detection competition sending described random access lead code.

Further, before the first processing module 1801 also can send random access lead code in the community of slave base stations, in specifying random access lead code group, select lead code, the lead code in described appointment random access lead code group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations; The first processing module 1801 can send the lead code of selecting from described appointment random access lead code group in the community of slave base stations.

Further, before the first processing module 1801 also can send random access lead code in the community of slave base stations, in specifying Physical Random Access Channel PRACH group, select PRACH, the PRACH in described appointment PRACH group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations; The first processing module 1801 can, according to the PRACH selecting from described appointment PRACH group, send random access lead code in the community of slave base stations.

Further, before the first processing module 1801 also can send random access lead code in the community of slave base stations, select to specify lead code form and the PRACH corresponding with described appointment lead code form, described appointment lead code form is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations; The first processing module 1801 can, according to the described appointment lead code form of selecting and the PRACH corresponding with described appointment lead code form, send random access lead code in the community of slave base stations.

Concrete, the second processing module 1802 can judge whether accidental access response message belongs to described terminal in the following manner: from described RA-RNTI, obtain cell ID, if described cell ID is identical with the sign of the community of the described random access lead code of transmission, and the random access lead code detecting is identical with the described random access lead code that described terminal sends, and the accidental access response message in described PDCCH belongs to described terminal.

Concrete, the second processing module 1802 can be monitored the PDCCH of RA-RNTI scrambling at the public search space of the main plot of described main control base station.

Concrete, the second processing module 1802 can be at the public search space of the main plot of described slave base stations, or at the public search space that sends the community of described random access lead code, monitors the PDCCH of RA-RNTI scrambling.

As shown in figure 19, this base station can be SeNB, and this base station can comprise:

The first processing module 1901, the random access lead code sending for receiving terminal;

The second processing module 1902, for the random access lead code sending according to described terminal, generate the accidental access response message for described terminal, physical downlink control channel PDCCH in the cell scheduling random access radio network temporary mark RA-RNTI of described slave base stations scrambling, or described accidental access response message is sent to the community of main control base station, so that the physical downlink control channel PDCCH of described main control base station scheduling random access radio network temporary mark RA-RNTI scrambling; Wherein, in described PDCCH, carry the accidental access response message for described terminal;

The 3rd processing module 1903, receives for the community sending described lead code the scheduled transmission message that described terminal sends;

The 4th processing module 1904, after solving at random access contention, sends competition in the community that sends described lead code and solves message.

Concrete, random access lead code is for specifying the lead code in random access lead code group, and the lead code in described appointment random access lead code group is exclusively used in terminal and uses at slave base stations initiation competition random access procedure.

Concrete, listening to the Physical Random Access Channel PRACH of described random access lead code for specifying the PRACH in PRACH group, the PRACH in described appointment PRACH group is exclusively used in terminal and uses at slave base stations initiation competition random access procedure.

Concrete, described random access lead code is for specifying lead code form, and described appointment lead code form is exclusively used in terminal and uses at slave base stations initiation competition random access procedure.

Concrete, in described RA-RNTI, carry the sign of the community of described slave base stations.

Concrete, the second processing module 1902 can be in the main plot of described slave base stations or in the community that sends described random access lead code, the PDCCH of scheduling RA-RNTI scrambling.

As shown in figure 20, this base station can be MeNB, and this base station can comprise:

Receiver module 2001, the accidental access response message sending for receiving the community of slave base stations;

Forwarding module 2002, for dispatching the physical downlink control channel PDCCH of random access radio network temporary mark RA-RNTI scrambling, carries described accidental access response message in described PDCCH.

Concrete, forwarding module 2002 can be at the PDCCH of the main plot of described main control base station scheduling RA-RNTI scrambling.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be in computer program instructions realization flow figure and/or block diagram each flow process and/or the flow process in square frame and flow chart and/or 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, the instruction of carrying out by the processor of computer or other programmable data processing device is produced for realizing the device in the function of flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized 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 in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing 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 on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.

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

Claims

1. a non-competing accidental access method, is characterized in that, comprising:

2. the method for claim 1, is characterized in that, obtains random access lead code resource and/or the PRACH resource of the community of slave base stations described in described PDCCH order, comprising:

Described terminal receives after the PDCCH order of C-RNTI scrambling in the community of main control base station, obtain random access lead code resource and/or PRACH resource in described PDCCH order, and the sign of the community of the described slave base stations corresponding with described random access lead code resource and/or PRACH resource;

Described terminal sends random access lead code according to described random access lead code resource and/or PRACH resource, comprising:

Described terminal, according to the sign of the community of described random access lead code resource and/or PRACH resource and described slave base stations, sends random access lead code in the community of corresponding slave base stations.

3. the method for claim 1, is characterized in that, described terminal judges whether accidental access response message belongs to described terminal in the following manner:

From described RA-RNTI, obtain cell ID, if described cell ID is identical with the sign of the community of transmission random access lead code, and the random access lead code detecting is identical with the described random access lead code that described terminal sends, and the accidental access response message in described PDCCH belongs to described terminal; Or

From described accidental access response message, obtain C-RNTI, if described C-RNTI is the C-RNTI of described terminal in the community that sends described random access lead code, described accidental access response message belongs to described terminal.

4. the method as described in any one in claim 1-3, is characterized in that, described terminal is monitored the PDCCH of RA-RNTI scrambling in the community of main control base station, comprising:

Described terminal, at the public search space of the main plot of described main control base station, is monitored the PDCCH of RA-RNTI scrambling.

5. the method as described in any one in claim 1-3, is characterized in that, described terminal is monitored the PDCCH of RA-RNTI scrambling in the community of described slave base stations, comprising:

Described terminal is at the public search space of the main plot of described slave base stations, or at the public search space that sends the community of described random access lead code, monitors the PDCCH of RA-RNTI scrambling.

6. a non-competing accidental access method, is characterized in that, comprising:

7. method as claimed in claim 6, it is characterized in that, in described PDCCH order, also carry the sign of the community of the slave base stations corresponding with described random access lead code resource and/or PRACH resource, so that described terminal sends random access lead code according to community corresponding to being identified at of the community of described slave base stations.

8. method as claimed in claim 6, is characterized in that, carries the sign of the community of described slave base stations in described RA-RNTI; And/or

In described accidental access response message, carry C-RNTI, described C-RNTI is the C-RNTI of described terminal in the community that sends described random access lead code.

9. the method as described in any one in claim 6-8, is characterized in that, the PDCCH of described slave base stations scheduling RA-RNTI scrambling, comprising:

Described slave base stations, in the main plot of described slave base stations or in the community that sends described random access lead code, is dispatched the PDCCH of RA-RNTI scrambling.

10. a non-competing accidental access method, is characterized in that, comprising:

11. methods as claimed in claim 10, it is characterized in that, in described PDCCH order, also carry the sign of the community of the slave base stations corresponding with described random access lead code resource and/or PRACH resource, the sign of the community of described slave base stations is that described slave base stations sends to described main control base station, so that described terminal sends random access lead code according to community corresponding to being identified at of the community of described slave base stations.

12. methods as claimed in claim 10, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI; And/or

13. methods as described in any one in claim 10-12, is characterized in that, the PDCCH of described main control base station scheduling RA-RNTI scrambling, comprising:

Described main control base station is at the PDCCH of the main plot of described main control base station scheduling RA-RNTI scrambling.

14. 1 kinds of terminals, is characterized in that, comprising:

15. terminals as claimed in claim 14, it is characterized in that, described the first processing module specifically for, in the community of main control base station, receive after the PDCCH order of C-RNTI scrambling, obtain random access lead code resource and/or PRACH resource in described PDCCH order, and the sign of the community of the described slave base stations corresponding with described random access lead code resource and/or PRACH resource;

Described the second processing module specifically for, the sign of the described random access lead code resource getting according to described the first processing module and/or the community of PRACH resource and described slave base stations, sends random access lead code in the community of corresponding slave base stations.

16. terminals as claimed in claim 14, is characterized in that, described the 3rd processing module specifically for, judge in the following manner whether accidental access response message belongs to described terminal:

17. terminals as described in any one in claim 14-16, is characterized in that, described the first processing module specifically for, at the public search space of the main plot of described main control base station, monitor the PDCCH of RA-RNTI scrambling.

18. terminals as described in any one in claim 14-16, it is characterized in that, described the first processing module specifically for, public search space in the main plot of described slave base stations, or monitor the PDCCH of RA-RNTI scrambling at the public search space that sends the community of described random access lead code.

19. 1 kinds of base stations, is characterized in that, described base station is slave base stations, and described slave base stations comprises:

20. base stations as claimed in claim 19, it is characterized in that, in described PDCCH order, also carry the sign of the community of the slave base stations corresponding with described random access lead code resource and/or PRACH resource, so that described terminal sends random access lead code according to community corresponding to being identified at of the community of described slave base stations.

21. base stations as claimed in claim 19, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI; And/or

22. base stations as described in any one in claim 19-21, is characterized in that, described the 3rd processing module specifically for, in the main plot of described slave base stations or in the community that sends described random access lead code, the PDCCH of scheduling RA-RNTI scrambling.

23. 1 kinds of base stations, is characterized in that, described base station is main control base station, and described main control base station comprises:

24. base stations as claimed in claim 23, it is characterized in that, in described PDCCH order, also carry the sign of the community of the slave base stations corresponding with described random access lead code resource and/or PRACH resource, the sign of the community of described slave base stations is that described slave base stations sends to described main control base station, so that described terminal sends random access lead code according to community corresponding to being identified at of the community of described slave base stations.

25. base stations as claimed in claim 23, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI; And/or

26. base stations as described in any one in claim 23-25, is characterized in that, described the second forwarding module specifically for, in the main plot of described main control base station, send the PDCCH of RA-RNTI scrambling.

27. 1 kinds of competitive random access method, is characterized in that, comprising:

Terminal sends random access lead code in the community of slave base stations;

28. methods as claimed in claim 27, is characterized in that, terminal, before the community of slave base stations sends random access lead code, also comprises:

Described terminal is selected lead code in specifying random access lead code group, and the lead code in described appointment random access lead code group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations;

Described terminal sends random access lead code in the community of slave base stations, comprising:

Described terminal sends in the community of slave base stations the lead code of selecting from described appointment random access lead code group.

29. methods as claimed in claim 27, is characterized in that, terminal, before the community of slave base stations sends random access lead code, also comprises:

Described terminal is selected PRACH in specifying Physical Random Access Channel PRACH group, and the PRACH in described appointment PRACH group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations;

Described terminal, according to the PRACH selecting from described appointment PRACH group, sends random access lead code in the community of slave base stations.

30. methods as claimed in claim 27, is characterized in that, terminal, before the community of slave base stations sends random access lead code, also comprises:

Described terminal selects to specify lead code form and the PRACH corresponding with described appointment lead code form, and described appointment lead code form is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations;

Described terminal, according to the described appointment lead code form of selecting and the PRACH corresponding with described appointment lead code form, sends random access lead code in the community of slave base stations.

31. methods as described in any one in claim 27-30, is characterized in that, described terminal judges whether accidental access response message belongs to described terminal in the following manner:

From described RA-RNTI, obtain cell ID, if described cell ID is identical with the sign of the community of the described random access lead code of transmission, and the random access lead code detecting is identical with the described random access lead code that described terminal sends, and the accidental access response message in described PDCCH belongs to described terminal.

32. methods as described in any one in claim 27-30, is characterized in that, described terminal is monitored the PDCCH of RA-RNTI scrambling in the community of main control base station, comprising:

Described terminal is monitored the PDCCH of RA-RNTI scrambling at the public search space of the main plot of described main control base station.

33. methods as described in any one in claim 27-30, is characterized in that, described terminal is monitored the PDCCH of RA-RNTI scrambling in the community of described slave base stations, comprising:

34. 1 kinds of competitive random access method, is characterized in that, comprising:

The random access lead code that slave base stations receiving terminal sends;

35. methods as claimed in claim 34, it is characterized in that, described random access lead code is for specifying the lead code in random access lead code group, and the lead code in described appointment random access lead code group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations.

36. methods as claimed in claim 34, it is characterized in that, listen to the Physical Random Access Channel PRACH of described random access lead code for specifying the PRACH in PRACH group, the PRACH in described appointment PRACH group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations.

37. methods as claimed in claim 34, is characterized in that, described random access lead code is for specifying lead code form, and described appointment lead code form is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations.

38. methods as described in any one in claim 34-37, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI.

39. methods as described in any one in claim 34-37, is characterized in that, described slave base stations sends the PDCCH of RA-RNTI scrambling, comprising:

Described slave base stations, in the main plot of described slave base stations or in the community that sends described random access lead code, sends the PDCCH of RA-RNTI scrambling.

40. 1 kinds of competitive random access method, is characterized in that, comprising:

41. methods as claimed in claim 40, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI.

42. methods as described in claim 40 or 41, is characterized in that, the PDCCH of described main control base station scheduling RA-RNTI scrambling, comprising:

43. 1 kinds of terminals, is characterized in that, comprising:

44. terminals as claimed in claim 43, it is characterized in that, the first processing module also for, before the community of slave base stations sends random access lead code, in specifying random access lead code group, select lead code, the lead code in described appointment random access lead code group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations;

Described the first processing module specifically for, in the community of slave base stations, send the lead code of selecting from described appointment random access lead code group.

45. terminals as claimed in claim 43, it is characterized in that, described the first processing module also for, before the community of slave base stations sends random access lead code, in specifying Physical Random Access Channel PRACH group, select PRACH, the PRACH in described appointment PRACH group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations;

Described the first processing module specifically for, according to the PRACH selecting, in the community of slave base stations, send random access lead code from described appointment PRACH group.

46. terminals as claimed in claim 43, it is characterized in that, described the first processing module also for, before the community of slave base stations sends random access lead code, select to specify lead code form and the PRACH corresponding with described appointment lead code form, described appointment lead code form is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations;

Described the first processing module specifically for, according to the described appointment lead code form of selecting and the PRACH corresponding with described appointment lead code form, in the community of slave base stations, send random access lead code.

47. terminals as described in any one in claim 43-46, is characterized in that, described the second processing module specifically for, judge in the following manner whether accidental access response message belongs to described terminal:

48. terminals as described in any one in claim 43-46, is characterized in that, described the second processing module specifically for, at the public search space of the main plot of described main control base station, monitor the PDCCH of RA-RNTI scrambling.

49. terminals as described in any one in claim 43-46, it is characterized in that, described the second processing module specifically for, public search space in the main plot of described slave base stations, or at the public search space that sends the community of described random access lead code, monitor the PDCCH of RA-RNTI scrambling.

50. 1 kinds of base stations, is characterized in that, described base station is slave base stations, and described slave base stations comprises:

51. base stations as claimed in claim 50, it is characterized in that, described random access lead code is for specifying the lead code in random access lead code group, and the lead code in described appointment random access lead code group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations.

52. base stations as claimed in claim 50, it is characterized in that, listen to the Physical Random Access Channel PRACH of described random access lead code for specifying the PRACH in PRACH group, the PRACH in described appointment PRACH group is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations.

53. methods as claimed in claim 50, is characterized in that, described random access lead code is for specifying lead code form, and described appointment lead code form is exclusively used in terminal and initiates the use of competition random access procedure in slave base stations.

54. base stations as described in any one in claim 50-53, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI.

55. base stations as described in any one in claim 50-53, is characterized in that, described the second processing module specifically for, in the main plot of described slave base stations or in the community that sends described random access lead code, the PDCCH of scheduling RA-RNTI scrambling.

56. 1 kinds of base stations, is characterized in that, described base station is main control base station, and described main control base station comprises:

57. base stations as claimed in claim 56, is characterized in that, carry the sign of the community of described slave base stations in described RA-RNTI.

58. base stations as described in claim 56 or 57, is characterized in that, described forwarding module specifically for, at the PDCCH of the main plot of described main control base station scheduling RA-RNTI scrambling.