CN104837209A - Random access method for dual connectivity communication and device - Google Patents
Random access method for dual connectivity communication and device Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W74/08—Non-scheduled access, e.g. ALOHA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/0858—Random access procedures, e.g. with 4-step access with collision treatment collision detection
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Abstract
The invention discloses a random access method for dual connectivity communication and a device. Aiming at the problem that great increase of the BD frequency may be brought in due to execution of a CBRA scheme in an auxiliary cell of the dual connectivity communication, the dual connectivity communication disclosed in the invention enables the BD frequency to be slightly increased or to be not increased according to the CBRA scheme of the auxiliary cell. In one embodiment, the DCI format sent by scheduling RAR information is limited to one type, so that complexity for treating UE is prevented against being improved. The device keeps compatibility with an existing system maximum.
Description
Technical field
The present invention relates to the accidental access method in the dual link communication in mobile communication technology field and device, particularly relate to the scheme that have employed the Stochastic accessing of the scene Zhong Fu community of the dual link communication technology in Long Term Evolution (LTE – Long Term Evolusion) system.
Background technology
Third generation partner program (3GPP – 3rd Generation Partner Project) is at version 12(R12 – Release12) in introduce Microcell and strengthen the problem of (SCE-Small CellEnhancement), the basis of R11 research is studied cellulor and disposes the solution improving message capacity in especially large scale deployment scene further.As a key technology of SCE, dual link (Dual Connectivity) scheme becomes study hotspot, and namely subscriber equipment (UE-User Equipment) keeps being connected with main plot (usually being maintained by macro base station) and auxiliary community (usually being maintained by micro-base station) simultaneously.Dual link communication can improve message capacity and robustness, and such as connected by macrocellular in the process of cellulor switching and keep communication to avoid call drop, such as uplink downlink can be connected to different honeycombs to obtain best link-quality again.
When dual link is implemented by different carrier, be the carrier aggregation (CA-Carrier Aggregation) between a kind of eNB in essence.Compare with the CA of R11, the passback between the macrocellular of dual link communication and cellulor is nonideal, and namely time delay is not 0.3GPP determines that in RAN2#84 meeting in dual link communication, UE can at content-based (CB-Contention Based) Stochastic accessing (RA-Random Access) of auxiliary community trip, JiUEFu community sends Stochastic accessing pilot frequency sequence (RAPS-Random Access Preamble Sequence), then obtain the Dynamic controlling identified by the tentative mark (RA-RNTI:RARadio Network Temporary Identifier) of Stochastic accessing (RA) wireless network from auxiliary community and indicate (DCI-Dynamical Control Indicator), the Physical Downlink Shared Channel (PDSCH-Physical Downlink Shared Channel) of described DCI scheduling contains replys (RAR-Random Access Response) message (Message) for the Stochastic accessing of described RAPS.
According to the design of existing LTE, the DCI of RA-RNTI mark transmits at public search space (CSS-Common Search Space), possible DCI format is 1A and 1C, different payload size that difference is corresponding, for the target DCI of the payload size in each CSS, subscriber equipment (UE-User Equipment) performs and is no more than 6 blind Detecting (BD-Blind Decoding) to obtain described target DCI.Namely, in traditional LTE, UE performs the target DCI that the BD being no more than at most 12 times detects RA-RNTI mark in CSS.In traditional CA, UE does not detect the CSS of auxiliary community, make maximum BD the number performed in auxiliary community be reduced to 32 times, namely in the specific search volume of UE (USS:UE-specific Search Space) for 2 kinds of payload size perform BD-wherein often kind of payload size perform 16 times.
For in dual link communication for for the CBRA of auxiliary community, one intuitively method be the CSS that requirement UE detects in auxiliary community, even if BD the number of UE on auxiliary community bring up to 44 times.But the increase of BD number can bring the raising of process complexity to UE.For this problem, the invention discloses the CBRA scheme for auxiliary community in the communication of a kind of dual link, the number of times of as far as possible few increase BD.
Summary of the invention
The invention discloses a kind of method in UE, wherein, comprise the steps:
A. on first service community, receive the high-level signaling for configuring second service community, described high-level signaling comprises Random Access Channel configuration signal
B. on second service community, send characteristic sequence, described characteristic sequence is Stochastic accessing pilot frequency sequence (RAPS)
C. the blind Detecting operation detection target DCI being no more than K time is performed in the DCI search volume in the first subframe of second service community
Wherein, described target DCI is identified by a RNTI, and described target DCI scheduling replys the transmission of (RAR) message for the Stochastic accessing of described characteristic sequence, and the DCI format of described target DCI is unique, described K is positive integer, and the first subframe belongs to the RAR window of described characteristic sequence.
Described RAPS is Zadoff-Chu sequence, and described RAR window is the time window configured by system side, and UE receives described RAR message in described RAR window.
As an embodiment, described Random Access Channel configuration signal is PRACH-ConfigSCell information particle (IE-Information Element), is configured with Physical Random Access Channel (the PRACH-Physical Random AccessChannel) resource of second service community.
Concrete, according to an aspect of the present invention, it is characterized in that, described DCI search volume is USS, and the DCI format of described target DCI is 1A, and described K is the maximum blind Detecting quantity for a kind of payload size in USS space, namely 16 times.
The essence of above-mentioned aspect is, the USS that UE sends RAPS Hou Zhifu community on auxiliary community performs the CSS that BD(does not detect auxiliary community), and existing LTE system keeps compatible.
Concrete, according to an aspect of the present invention, it is characterized in that, described DCI search volume is CSS, and the DCI format of described target DCI is 1A or 1C, and described K is the maximum blind Detecting quantity for a kind of payload size in CSS space, namely 6 times.
The essence of above-mentioned aspect is, the CSS that UE sends RAPS Hou Fu community on auxiliary community performs blind Detecting for a kind of DCI format (payload size), makes maximum BD several increase on auxiliary community 6 times.If described target DCI is fixed as DCI format 1A, can obtains and dispatch more flexibly, if described target DCI be fixed as DCI format 1C, the better quality of reception or MPS process can be obtained.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, a RNTI is the RA-RNTI be associated with the PRACH receiving described characteristic sequence.
As an embodiment, in CBRA traditionally, determine that the method for RA-RNTI determines a RNTI:
One RNTI=1+t_id+10*f_id
Wherein t_id is first subframe index that described PRACH takies, and 0≤t_id<10, f_id are the index of described PRACH in first subframe, 0≤f_id<6.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps: before described step B
B0. on first service community, send the random access request of up signaling instruction on second service community
B1. on first service community, receive the index that downlink signaling obtains a RNTI and described characteristic sequence.
The essence of above-mentioned aspect is that a RNTI is configured by main plot.As an embodiment, a RNTI is the current community RNTI(C-RNTI:Cell RNTI be assigned with in first service community of the sender of described up signaling).Namely main plot and auxiliary community use identical RNTI.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
If D. described target DCI detected in described step C, second service community receives described RAR message according to the scheduling of described target DCI on PDSCH; If described target DCI do not detected and the second subframe belongs to the RAR window of described characteristic sequence in described step C, the second subframe continues perform the described blind Detecting being no more than K time and operate.Second subframe is first subframe after the first subframe.
The invention discloses a kind of method in base station, wherein, comprise the steps:
A. on first service community, send the high-level signaling for configuring second service community, described high-level signaling comprises Random Access Channel configuration signal
B. on first service community, receive up signaling obtain the random access request on second service community
C. on first service community, send the index of downlink signaling instruction the one RNTI and characteristic sequence
D. the index of feeding back signaling instruction the one RNTI and described characteristic sequence is sent by inter-base station interface
Wherein, described characteristic sequence is Stochastic accessing pilot frequency sequence.
As an embodiment, a RNTI is the current C-RNTI be assigned with in first service community of sender of described up signaling.
As an embodiment, described inter-base station interface is X2 interface.
The invention discloses a kind of method in base station, wherein, comprise the steps:
A. receive feature sequence, described characteristic sequence is Stochastic accessing pilot frequency sequence
B. target DCI is sent in the DCI search volume in a subframe in the RAR window of described characteristic sequence
C. the RAR message for described characteristic sequence is sent according to the scheduling of described target DCI
Wherein, described target DCI is identified by a RNTI, and the position of described target DCI in described DCI search volume is one of K position candidate, and the DCI format of described target DCI is unique, and described K is positive integer.
If described DCI search volume is CSS, a described K position candidate is traditionally LTE scheme pre-determining; If described DCI search volume is USS, a described K position candidate traditionally LTE scheme is determined by a RNTI.
Concrete, according to an aspect of the present invention, it is characterized in that, described DCI search volume is USS, and the DCI format of described target DCI is 1A, and described K is the maximum blind Detecting quantity for a kind of payload size in USS space, namely 16.
Concrete, according to a further aspect of the invention, it is characterized in that, described DCI search volume is CSS, and the DCI format of described target DCI is 1A or 1C, and described K is the maximum blind Detecting quantity for a kind of payload size in USS space, namely 6.
As an embodiment of above-mentioned aspect, a RNTI is the RA-RNTI be associated with the PRACH receiving described characteristic sequence.
Concrete, according to above-mentioned aspect of the present invention, it is characterized in that, also comprise the steps: before described steps A
A0. receive by inter-base station interface the index that feeding back signaling obtains a RNTI and described characteristic sequence.
As an embodiment of above-mentioned aspect, it is characterized in that, a RNTI is the C-RNTI that the Serving cell of the current sender at described feeding back signaling of sender of described characteristic sequence is assigned with.
The invention discloses a kind of subscriber equipment, wherein, comprise as lower module:
First module: for receiving the high-level signaling for configuring second service community on first service community, described high-level signaling comprises Random Access Channel configuration signal
Second module: for sending characteristic sequence on second service community, described characteristic sequence is Stochastic accessing pilot frequency sequence
3rd module: for performing the blind Detecting operation detection target DCI being no more than K time in the DCI search volume in the first subframe of second service community
Wherein, described target DCI is identified by a RNTI, and described target DCI scheduling is for the transmission of the RAR message of described characteristic sequence, and the DCI format of described target DCI is unique, and described K is positive integer, and the first subframe belongs to the RAR window of described characteristic sequence.
As an embodiment, the said equipment also comprises:
Four module: for sending the random access request of up signaling instruction on second service community on first service community
5th module: the index obtaining a RNTI and described characteristic sequence for receiving downlink signaling on first service community.
The invention discloses a kind of base station equipment, wherein, comprise as lower module:
First module: for sending the high-level signaling for configuring second service community on first service community, described high-level signaling comprises Random Access Channel configuration signal
Second module: obtain the random access request on second service community for receiving up signaling on first service community
3rd module: for sending the index of downlink signaling instruction the one RNTI and characteristic sequence on first service community
Four module: for being sent the index of feeding back signaling instruction the one RNTI and described characteristic sequence by inter-base station interface
Wherein, described characteristic sequence is Stochastic accessing pilot frequency sequence.
The invention discloses a kind of base station equipment, wherein, comprise as lower module:
First module: for receive feature sequence, described characteristic sequence is Stochastic accessing pilot frequency sequence
Second module: for sending target DCI in the DCI search volume in a subframe in the RAR window of described characteristic sequence
3rd module: for sending the RAR message for described characteristic sequence according to the scheduling of described target DCI
Wherein, described target DCI is identified by a RNTI, and the position of described target DCI in described DCI search volume is one of K position candidate, and the DCI format of described target DCI is unique, and described K is positive integer.
As an embodiment, the said equipment also comprises:
Four module: for receiving by inter-base station interface the index that feeding back signaling obtains a RNTI and described characteristic sequence.
Perform on dual link communication Zhong Fu community this problem of a larger increase that CBRA may bring BD number, the invention discloses the CBRA scheme for auxiliary community in the communication of a kind of dual link, increase on a small quantity or do not increase BD number.As an embodiment, the DCI format that scheduling RAR message sends is restricted to one, avoids the raising of UE process complexity.The present invention and existing system maintain maximum compatibility.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the flow chart carrying out CBRA on auxiliary community according to an embodiment of the invention;
Fig. 2 shows the RNTI configuration flow figure of the scheduling DCI of auxiliary community according to an embodiment of the invention RAR message;
Fig. 3 shows the structured flowchart for the processing unit in UE according to an embodiment of the invention;
Fig. 4 shows the structured flowchart for the processing unit in base station according to an embodiment of the invention;
Fig. 5 shows the structured flowchart for the processing unit in base station according to still another embodiment of the invention;
Embodiment
Hereafter will be described in further detail technical scheme of the present invention by reference to the accompanying drawings, and it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 Shi Fu community is carried out the flow chart of CBRA, as shown in Figure 1.In accompanying drawing 1, base station N2 is the maintenance base station of first service community, and base station N3 is the maintenance base station of second service community.
For
uE U1, in step s 11, first service community receives the high-level signaling for configuring second service community; In step s 12, second service community sends characteristic sequence; In step s 13, the blind Detecting operation detection target DCI being no more than K time is performed in the DCI search volume in the first subframe of second service community; In step S14: if described target DCI detected in described step S13, second service community receives RAR message according to the scheduling of described target DCI on PDSCH, if described target DCI do not detected and the second subframe belongs to the RAR window of described characteristic sequence in described step S13, second subframe continues to perform the described blind Detecting operation being no more than K time, and the second subframe is first subframe after the first subframe.
For
base station N2, in the step s 21, first service community sends the high-level signaling for configuring second service community.
For
base station N3, in step S31, receive described characteristic sequence; In step s 32, target DCI is sent in the DCI search volume in a subframe in the RAR window of described characteristic sequence; In step S33, send the RAR message for described characteristic sequence according to the scheduling of described target DCI.Wherein, the position of described target DCI in described DCI search volume is one of K position candidate.
In embodiment 1, described high-level signaling comprises Random Access Channel configuration signal (the PRACH-ConfigSCell IE in such as LTE), characteristic sequence is Stochastic accessing pilot frequency sequence, described target DCI is identified by a RNTI, described target DCI scheduling is for the transmission of the RAR message of described characteristic sequence, the DCI format of described target DCI is unique, and described K is positive integer, and the first subframe belongs to the RAR window of described characteristic sequence.
As a sub-embodiment of embodiment 1, described DCI search volume is USS, and the DCI format of described target DCI is 1A, and described K is 16.
As another sub-embodiment of embodiment 1, described DCI search volume is CSS, and the DCI format of described target DCI is 1A, and described K is 6.
As another sub-embodiment of embodiment 1, described DCI search volume is CSS, and the DCI format of described target DCI is 1C, and described K is 6.
Embodiment 2
The RNTI configuration flow figure of the scheduling DCI of embodiment 2 Shi Fu community RAR message, as shown in Figure 2.In embodiment 2, base station N5 is the maintenance base station of first service community, and base station N6 is the maintenance base station of second service community.Connected by X2 interface between base station N5 and base station N6.
For
uE U4, in step S41, first service community sends the random access request of up signaling instruction on second service community; In step s 51, first service community receives the index that downlink signaling obtains a RNTI and characteristic sequence.
For
base station N5, in step s 51, first service community receives up signaling and obtains the random access request on second service community; In step S52, first service community sends the index of downlink signaling instruction the one RNTI and characteristic sequence; In step S53, sent the index of feeding back signaling instruction the one RNTI and described characteristic sequence by inter-base station interface.
For
base station N6, in step S61, receive by inter-base station interface the index that feeding back signaling obtains a RNTI and described characteristic sequence.
In embodiment 2, described characteristic sequence is Stochastic accessing pilot frequency sequence, and described inter-base station interface is X2 interface.
Embodiment 3
Embodiment 3 is the structured flowcharts for the processing unit in UE, as shown in Figure 3.In accompanying drawing 3, the processing unit 200 in UE is by receiver module 201, and sending module 202, receiver module 203, sending module 204, detection module 205 forms, wherein the module of dotted line frame F1 mark, i.e. sending module 202 and receiver module 203 is optional modules.
Receiver module 201 for receiving the high-level signaling for configuring second service community on first service community, and described high-level signaling comprises Random Access Channel configuration signal; Sending module 202 for sending the random access request of up signaling instruction on second service community on first service community; Receiver module 203 obtains the index of a RNTI and characteristic sequence for receiving downlink signaling on first service community; Sending module 204 for sending the characteristic sequence identified by described index on second service community; Detection module 205 is for performing the blind Detecting operation detection target DCI being no more than K time in the DCI search volume in the first subframe of second service community
Wherein, described characteristic sequence is Stochastic accessing pilot frequency sequence, described target DCI is identified by a RNTI, described target DCI scheduling is for the transmission of the RAR message of described characteristic sequence, the DCI format of described target DCI is unique, described K is positive integer, and the first subframe belongs to the RAR window of described characteristic sequence.
As a sub-embodiment of embodiment 3, sending module 202 and receiver module 203 do not exist, and described characteristic sequence is selected voluntarily by described UE, and a RNTI is the RA-RNTI be associated with the PRACH receiving described characteristic sequence.
As another sub-embodiment of embodiment 3, a RNTI is the current C-RNTI be assigned with on first service community of described UE, and namely described UE uses a RNTI to carry out blind check to the DCI on first service community simultaneously.
Embodiment 4
Embodiment 4 is structured flowcharts for the processing unit in base station according to an embodiment of the invention, as shown in Figure 4.In accompanying drawing 4, base station apparatus 300 is by sending module 301, and receiver module 302, sending module 303, sending module 304 forms.
Sending module 301 for sending the high-level signaling for configuring second service community on first service community, and described high-level signaling comprises Random Access Channel configuration signal; Receiver module 302 obtains the random access request on second service community for receiving up signaling on first service community; Sending module 303 for sending the index of downlink signaling instruction the one RNTI and characteristic sequence on first service community; Sending module 304 is for sending the index of feeding back signaling instruction the one RNTI and described characteristic sequence by inter-base station interface.
In embodiment 4, described characteristic sequence is Stochastic accessing pilot frequency sequence, and described up signaling is high-level signaling.
Embodiment 5
Embodiment 5 is structured flowcharts for the processing unit in base station according to still another embodiment of the invention, as shown in Figure 5.In accompanying drawing 5, base station apparatus 400 is by receiver module 401, and receiver module 402, sending module 403, sending module 404 forms.Wherein, dotted line frame F2 identify module and receiver module 401 be optional.
Receiver module 401 is for receiving by inter-base station interface the index that feeding back signaling obtains a RNTI and characteristic sequence; Receiver module 402 receives the characteristic sequence identified by described index; Sending module 403 is for sending target DCI in the DCI search volume in a subframe in the RAR window of described characteristic sequence; Sending module 404 is for sending the RAR message for described characteristic sequence according to the scheduling of described target DCI
In embodiment 5, described characteristic sequence is Stochastic accessing pilot frequency sequence, and described target DCI is identified by a RNTI, and the position of described target DCI in described DCI search volume is one of K position candidate, the DCI format of described target DCI is unique, and described K is positive integer.
As a sub-embodiment of embodiment 5, receiver module 401 does not exist, and a RNTI is determined according to the PRACH of the characteristic sequence received in base station.
The all or part of step that one of ordinary skill in the art will appreciate that in said method can be carried out instruction related hardware by program and complete, and described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improves, all should be included within protection scope of the present invention.
Claims (20)
1. the method in UE, wherein, comprises the steps:
A. on first service community, receive the high-level signaling for configuring second service community, described high-level signaling comprises Random Access Channel configuration signal
B. on second service community, send characteristic sequence, described characteristic sequence is Stochastic accessing pilot frequency sequence
C. the blind Detecting operation detection target DCI being no more than K time is performed in the DCI search volume in the first subframe of second service community
Wherein, described target DCI is identified by a RNTI, and described target DCI scheduling is for the transmission of the RAR message of described characteristic sequence, and the DCI format of described target DCI is unique, and described K is positive integer, and the first subframe belongs to the RAR window of described characteristic sequence.
2. method according to claim 1, is characterized in that, described DCI search volume is USS, and the DCI format of described target DCI is 1A, and described K is the maximum blind Detecting quantity for a kind of payload size in USS space.
3. method according to claim 1, is characterized in that, described DCI search volume is CSS, and the DCI format of described target DCI is 1A or 1C, and described K is the maximum blind Detecting quantity for a kind of payload size in CSS space.
4. according to claim 1,2, the method described in 3, is characterized in that, also comprises the steps: before described step B
B0. on first service community, send the random access request of up signaling instruction on second service community
B1. on first service community, receive the index that downlink signaling obtains a RNTI and described characteristic sequence.
5. method according to claim 3, is characterized in that, a RNTI is the RA-RNTI be associated with the PRACH receiving described characteristic sequence.
6. method according to claim 1, is characterized in that, also comprises the steps:
If D. described target DCI detected in described step C, second service community receives described RAR message according to the scheduling of described target DCI on PDSCH; If described target DCI do not detected and the second subframe belongs to the RAR window of described characteristic sequence in described step C, the second subframe continues perform the described blind Detecting being no more than K time and operate.Second subframe is first subframe after the first subframe.
7. method according to claim 4, is characterized in that, a RNTI is the current C-RNTI be assigned with in first service community of sender of described up signaling.
8. the method in base station, wherein, comprises the steps:
A. on first service community, send the high-level signaling for configuring second service community, described high-level signaling comprises Random Access Channel configuration signal
B. on first service community, receive up signaling obtain the random access request on second service community
C. on first service community, send the index of downlink signaling instruction the one RNTI and characteristic sequence
D. the index of feeding back signaling instruction the one RNTI and described characteristic sequence is sent by inter-base station interface
Wherein, described characteristic sequence is Stochastic accessing pilot frequency sequence.
9. method according to claim 8, is characterized in that, a RNTI is the current C-RNTI be assigned with in first service community of sender of described up signaling.
10. the method in base station, wherein, comprises the steps:
A. receive feature sequence, described characteristic sequence is Stochastic accessing pilot frequency sequence
B. target DCI is sent in the DCI search volume in a subframe in the RAR window of described characteristic sequence
C. the RAR message for described characteristic sequence is sent according to the scheduling of described target DCI
Wherein, described target DCI is identified by a RNTI, and the position of described target DCI in described DCI search volume is one of K position candidate, and the DCI format of described target DCI is unique, and described K is positive integer.
11. methods according to claim 10, is characterized in that, described DCI search volume is USS, and the DCI format of described target DCI is 1A, and described K is the maximum blind Detecting quantity for a kind of payload size in USS space.
12. methods according to claim 10, is characterized in that, described DCI search volume is CSS, and the DCI format of described target DCI is 1A or 1C, and described K is the maximum blind Detecting quantity for a kind of payload size in USS space.
13. according to claim 10, and 11, the method described in 12, is characterized in that, also comprises the steps: before described steps A
A0. receive by inter-base station interface the index that feeding back signaling obtains a RNTI and described characteristic sequence.
14. methods according to claim 12, is characterized in that, a RNTI is the RA-RNTI be associated with the PRACH receiving described characteristic sequence.
15. methods according to claim 13, is characterized in that, a RNTI is the C-RNTI that the Serving cell of the current sender at described feeding back signaling of sender of described characteristic sequence is assigned with.
16. 1 kinds of subscriber equipmenies, wherein, comprise as lower module:
First module: for receiving the high-level signaling for configuring second service community on first service community, described high-level signaling comprises Random Access Channel configuration signal
Second module: for sending characteristic sequence on second service community, described characteristic sequence is Stochastic accessing pilot frequency sequence
3rd module: for performing the blind Detecting operation detection target DCI being no more than K time in the DCI search volume in the first subframe of second service community
Wherein, described target DCI is identified by a RNTI, and described target DCI scheduling is for the transmission of the RAR message of described characteristic sequence, and the DCI format of described target DCI is unique, and described K is positive integer, and the first subframe belongs to the RAR window of described characteristic sequence.
17. equipment according to claim 16, is characterized in that, this equipment also comprises:
Four module: for sending the random access request of up signaling instruction on second service community on first service community
5th module: the index obtaining a RNTI and described characteristic sequence for receiving downlink signaling on first service community.
18. 1 kinds of base station equipments, wherein, comprise as lower module:
First module: for sending the high-level signaling for configuring second service community on first service community, described high-level signaling comprises Random Access Channel configuration signal
Second module: obtain the random access request on second service community for receiving up signaling on first service community
3rd module: for sending the index of downlink signaling instruction the one RNTI and characteristic sequence on first service community
Four module: for being sent the index of feeding back signaling instruction the one RNTI and described characteristic sequence by inter-base station interface
Wherein, described characteristic sequence is Stochastic accessing pilot frequency sequence.
19. 1 kinds of base station equipments, wherein, comprise as lower module:
First module: for receive feature sequence, described characteristic sequence is Stochastic accessing pilot frequency sequence
Second module: for sending target DCI in the DCI search volume in a subframe in the RAR window of described characteristic sequence
3rd module: for sending the RAR message for described characteristic sequence according to the scheduling of described target DCI
Wherein, described target DCI is identified by a RNTI, and the position of described target DCI in described DCI search volume is one of K position candidate, and the DCI format of described target DCI is unique, and described K is positive integer.
20. equipment according to claim 19, is characterized in that, this equipment also comprises:
Four module: for receiving by inter-base station interface the index that feeding back signaling obtains a RNTI and described characteristic sequence.
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