CN106455113A

CN106455113A - Random access method, device and system

Info

Publication number: CN106455113A
Application number: CN201510491483.4A
Authority: CN
Inventors: 高雪娟; 邢艳萍
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-08-11
Filing date: 2015-08-11
Publication date: 2017-02-22
Anticipated expiration: 2035-08-11
Also published as: CN106455113B; WO2017024912A1

Abstract

The invention discloses a random access method, device and system for solving a large feedback overhead if the msg3 of each terminal performs ACK / NACK feedback by using an independent UL grant in a coverage enhancement scene. The method comprises the following steps: the terminal determines the RNTI dedicated to the ACK/NACK feedback and corresponding to the RA-RNTI of the terminal according to a correspondence relationship between the RA-RNTI and the RNTI dedicated to the ACK/NACK feedback; using the RNTI dedicated to the ACK/NACK feedback to detect a downlink control channel to obtain a downlink message for carrying the ACK/NACK feedback corresponding to Msg3; and acquiring the ACK/NACK feedback of the Msg3 of the terminal from the downstream message according to the location of the ACK/NACK feedback of the Msg3 of the terminal in the downlink message, thereby saving system resources.

Description

A kind of accidental access method, equipment and system

Technical field

The present invention relates to communication technical field, particularly to the Stochastic accessing side under a kind of coverage enhancement scene Method, equipment and system.

Background technology

Competition Stochastic accessing refer to base station (eNodeB, eNB) be not terminal (User Terminal, and Claim user equipment, User Equipment, UE) distribution private resource, completely by terminal random initiate with Machine access procedure.Competition Stochastic accessing is applied to all five kinds of scenes, for wireless heterogeneous networks (Radio Resource Control, RRC) scene that reaches of connection establishment, RRC connection reconstruction and upstream data, with It is entirely spontaneous by terminal that machine accesses, and eNB does not have any prior information；Switching and downlink data are arrived Reach scene, terminal indicates according to eNB initiates Stochastic accessing, it is, in general, that eNB meeting prioritizing selection is non-competing Strive Stochastic accessing, only in the case that non-competing random access resource not distributes, just can instruction terminal send out Play competition Stochastic accessing.Competition random access procedure divides four steps to complete, as shown in figure 1, each step is referred to as one This four steps are referred to as Msg1～Msg4 in relevant criterion by bar message (Message, abbreviation Msg). Wherein：

(1)Msg1：Leading (preamble) sequence.

This message is upstream message, is sent by terminal, and eNB receives, and is carried on Physical Random Access Channel Send in (Physical Random Access Channel, PRACH).For competition Stochastic accessing, whole The preamble sequence that end sends is randomly choosing in specific preamble set, different Preamble sequence there are different identification informations, i.e. preamble index (index).

(2)Msg2：Accidental access response (Random Access Response, RAR).

This message is downstream message, is sent by eNB, and terminal receives.

Msg2 be eNB after receiving Msg1 to terminal initiate Stochastic accessing response it is necessary to Send in accidental access response window.Accidental access response window starting point is to meet first available descending son of n+3 Frame, last subframe that n sends for preamble sequence, length is 2～10ms, by eNB in system Specify in message.

Msg2 medium education (Media Access Control, MAC) layer define descending shared Channel (Downlink Shared Channel, DL-SCH) carries, and shares in the corresponding physical down of physical layer Channel (Physical Downlink Shared Channel, PDSCH).Article one, Msg2 can respond multiple The random access request of terminal, carries the RAR of multiple terminals simultaneously, and therefore Msg2 does not mix automatically Repeat requests (Hybrid Automatic Repeat reQuest, HARQ) process, that is, do not have repeat request mistake Journey.

Random access radio network temporary mark (the Random by transmission in public search space for the eNB Access Radio Network Temporary Identifier, RA-RNTI) physical down that scrambles controls letter Road (Physical Downlink Control Channel, PDCCH) dispatch Msg2, RA-RNTI by send out The PRACH running time-frequency resource position sending Msg1 determines；Terminal meter using identical PRACH running time-frequency resource Calculation obtains identical RA-RNTI, and its RAR information package sends in same RAR message, this RAR Message bearing transmits in the DSCH Downlink Shared Channel of the PDCCH scheduling being scrambled by this RA-RNTI, and should DSCH Downlink Shared Channel is also scrambled using this RA-RNTI.

Content in Msg2 includes：Backoff (rollback) parameter preamble sequence corresponding with Msg1 Row identification information, uplink Timing Advance (TA), Msg3 uplink scheduling license (UL grant, Be also called RAR grant in physical layer), interim (Temporary) cell-level Radio Network Temporary Identifier (Cell- Radio Network Temporary Identifier, C-RNTI), abbreviation TC-RNTI.Wherein, backoff If parameter is used for indicating this random access failure, terminal initiates the time delay average of Stochastic accessing next time.

Terminal passes through the PRACH time-frequency domain resources being used from transmission preamble sequence in Msg1 The RA-RNTI determining, the RAR message that identification carries itself RAR (sends in DL-SCH Msg2), according to the mark letter from the preamble sequence sending in Msg1 in this RAR message Breath determination is sent to the RAR of oneself.If terminal is not properly received Msg2, according to backoff The time delay of parameter limits and determines the time delay next time initiating Stochastic accessing, in addition selects random access resource to initiate Stochastic accessing next time.Reach after largest random accesses number of times, the MAC layer of terminal to rrc layer report with Machine accesses problem, triggers Radio Link Failure (Radio Link Failure, RLF) process.

(3)Msg3：First time scheduling of upstream transmissions.

This message is upstream message, is sent by terminal, and eNB receives.

, after receiving Msg2, the UL grant included in the RAR of itself obtaining is (i.e. for terminal RAR grant) indicated by ascending resource on the uplink that carries out, i.e. the RAR grant according to itself In transmitting scheduling information Physical Uplink Shared Channel (Physical Uplink Shared Channel, PUSCH), the corresponding MAC layer of this PUSCH Uplink Shared Channel (Uplink Shared Channel, UL-SCH).Using HARQ procedure, ascending resource minimum can transmit 56 bits.

The initial transmission of Msg3 is unique uplink by MAC layer dynamic dispatching, needs at MAC layer Reason, therefore Msg3 and Msg2 is at least spaced 6ms, and the re-transmission of other Msg3 is all to be completed by PDCCH , this PDCCH transmits in public search space, and is scrambled using TC-RNTI.

For different scenes, in Msg3, comprise different contents：

It is initially accessed：Carry the RRC connection request message of rrc layer generation, do not comprise Non-Access Stratum (Non Access Stratum, NAS) message；It is CCCH in the corresponding logic channel of MAC layer (Common Control Channel, CCCH) transmits；

Connection reconstruction：Carry the RRC connection reconstruction request of rrc layer generation, do not comprise NAS message； It is CCCH in the corresponding logic channel of MAC layer；

Switching：The RRC handoff completion message that transmission rrc layer generates, in MAC layer corresponding logic letter Road is with dedicated control channels (Dedicate Control Channel, DCCH)；The C-RNTI of transmission terminal； If resource enough, can comprise up buffer status report (BSR)；

Up-downgoing data reaches：The C-RNTI of at least transmission terminal.

(4)Msg4：Contention resolved.

This message is downstream message, is sent by eNB, and terminal receives.

ENB and terminal complete final contention resolved by Msg4.In the content of Msg4 and Msg3 Hold corresponding.

With the rise of Internet of Things, in long evolving system (Long Term Evolution, LTE) system Middle support machine type communication (Machine Type Communication, MTC) is increasingly taken seriously. The physical layer set up the project for MTC in 3GPP Release 13 strengthens project.One MTC device ( Referred to as MTC terminal) it is likely to be of multiple machines and machine (Machine to Machine, M2M) communication Part of properties in characteristic, such as Hypomobility, transmitted data amount is little, insensitive to communication delay, require pole Low-power consumption etc..

In existing network, operator finds the terminal working under some scenes, such as works in basement, business Field or the terminal in building corner, because wireless signal is seriously blocked, signal is subject to very big decaying, no Method is communicated with network, and is directed to and carries out the depth covering of network under these scenes and can greatly increase network Networking cost.Through test it is believed that needing to carry out a certain degree of enhancing to existing covering.Realize covering and increase By force, a kind of more feasible method is using repeating transmission or similar techniques to existing channel, permissible in theory By carrying out to existing physical channel tens times to hundreds of time repeating the transmission a certain degree of covering gain of acquisition.

When carrying out coverage enhancement transmission, in order to improve transmission performance, need to carry out transmission is repeated several times.Right The dispatch of the message in above-mentioned random access procedure, each step and message itself and anti-accordingly Feedforward information is required for carrying out repeating to transmit.For public search space, substantial amounts of repeat transmission and lead to prop up Hold multiple terminals and be controlled information transfer simultaneously；On the other hand, have determined in MTC system and do not support Physical mixing retransmission indicating chanel (Physical Hybrid-ARQ Indicator Channel, PHICH) passes Defeated, if positive acknowledgment is carried out using an independent UL grant for each Msg3 (ACKnowledgement, ACK)/Negative Acknowledgement (Negative ACKnowledgement, NACK) Feedback, because UL grant is mainly used in schedule data transmission, wherein comprises related to data transfer in a large number Information field, the such as information such as resource allocation, modulation levels, the fresh information instructions field of only 1 bit in UL grant It is used to feeding back ACK/NACK, therefore, even if only needing feeding back ACK/NACK without finger Show the information such as resource allocation, modulation levels it is also desirable to repeat to send a UL grant, feedback overhead is larger, Need to consider the feedback system new to the ACK/NACK Feedback Design of Msg3, to improve feedback effect Rate, save resources expense.

Content of the invention

Embodiments provide a kind of accidental access method, equipment and system, for solving coverage enhancement Under scene, if the Msg3 for each terminal carries out ACK/NACK using an independent UL grant Feedback, can lead to the larger problem of feedback overhead.

A kind of accidental access method provided in an embodiment of the present invention, including：

Terminal according to RA-RNTI and be exclusively used in ACK/NACK feedback RNTI corresponding relation, really Make the corresponding RNTI being exclusively used in ACK/NACK feedback of RA-RNTI of described terminal；

Described terminal, using the described RNTI being exclusively used in ACK/NACK feedback, detects down control channel, To obtain the downstream message for carrying Msg3 corresponding ACK/NACK feedback；

Described terminal is fed back in described downstream message according to the corresponding ACK/NACK of Msg3 of described terminal In position, obtain from described downstream message described terminal Msg3 ACK/NACK feedback.

In force, described terminal obtains the Msg3's of described terminal from described downstream message Before ACK/NACK feedback, also include：

Described terminal determines that the Msg3 of described terminal corresponding ACK/NACK feedback descending disappears described Position in breath.

In force, as the first preferred implementation, described terminal determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback, including：

Described terminal position in RAR message according to the accidental access response RAR of described terminal, determines The corresponding ACK/NACK of Msg3 going out described terminal feeds back the position in described downstream message；

Wherein, row in described downstream message for the Msg3 of the different terminals corresponding ACK/NACK feedback Sortord in RAR message for the sequential mode RAR corresponding with this terminal is identical, described RAR message Scrambled by described RA-RNTI.

As the preferred implementation of second, described terminal determines that the Msg3 of described terminal is corresponding Position in described downstream message for the ACK/NACK feedback, including：

The identification information of the preamble sequence according to described terminal for the described terminal, determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback；

Wherein, each ACK/NACK in described downstream message feeds back the A bit letter before position Breath or A bit information afterwards are the preamble sequence that this ACK/NACK feeds back corresponding terminal Identification information, A is natural number.

As the third preferred implementation, described terminal determines that the Msg3 of described terminal is corresponding Position in described downstream message for the ACK/NACK feedback, including：

Physical Resource Block PRB, transmission Msg3 that described terminal is used according to described terminal transmission Msg3 The narrow band information being located and at least one transmitted in the pilot tone circular shift information that Msg3 is used are believed Breath, determines that the corresponding ACK/NACK of Msg3 of described terminal feeds back the position in described downstream message Put.

In the embodiment of the present invention, described down control channel is EPDCCH.

In the embodiment of the present invention, described downstream message is the DCI being exclusively used in transmitting ACK/NACK feedback, Wherein, described DCI comprises M-bit information, and described M-bit information is divided into N number of information field, institute State each information field in N number of information field to be respectively intended to carry an ACK/NACK feedback.

In the embodiment of the present invention, described down control channel transmits in public search space.

In the embodiment of the present invention, RA-RNTI is closed with the corresponding of the RNTI being exclusively used in ACK/NACK feedback Being is described terminal and base station is predefined, or is notified to described terminal by system message by base station.

Based on any of the above-described embodiment, described terminal obtains the Msg3 of described terminal from described downstream message ACK/NACK feedback after, also include：

If the ACK/NACK of the Msg3 of described terminal is fed back to NACK, described terminal is according to described end Hold corresponding RAR to permit the schedule information indicated by grant, again transmit the Msg3 of described terminal.

Another kind accidental access method provided in an embodiment of the present invention, including：

Base station receives the Msg3 that at least two terminals send, and produces the Msg3 of described at least two terminals Corresponding ACK/NACK feedback；

The Msg3 corresponding ACK/NACK feedback of described at least two terminals is mapped to down by described base station In row message；

RA-RNTI according to corresponding to described at least two terminals for the described base station be exclusively used in ACK/NACK The corresponding relation of the RNTI of feedback, determining described RA-RNTI, corresponding to be exclusively used in ACK/NACK anti- The RNTI of feedback；

Described base station is carried out to described downstream message using the described RNTI being exclusively used in ACK/NACK feedback Scrambling, and pass through down control channel, send the downstream message after scrambling.

In force, as the first preferred implementation, described base station is by described at least two terminals Msg3 corresponding ACK/NACK feedback is mapped in described downstream message, including：

Described base station position in RAR message according to the corresponding RAR of described at least two terminals, by institute The Msg3 corresponding ACK/NACK feedback stating at least two terminals is mapped in downstream message；

As the preferred implementation of second, the Msg3 of described at least two terminals is corresponded to by described base station ACK/NACK feedback be mapped in described downstream message, including：

The identification information of the preamble sequence according to described at least two terminals for the described base station, by described at least The Msg3 corresponding ACK/NACK feedback of two terminals is mapped in downstream message；

As the third preferred implementation, the Msg3 of described at least two terminals is corresponded to by described base station ACK/NACK feedback be mapped in described downstream message, including：

PRB that described base station is used according to described at least two terminal transmission Msg3, transmission Msg3 institute Narrow band information and the transmission pilot tone circular shift information that used of Msg3 at least one information, The Msg3 corresponding ACK/NACK feedback of described at least two terminals is mapped in downstream message.

In the embodiment of the present invention, RA-RNTI is closed with the corresponding of the RNTI being exclusively used in ACK/NACK feedback Being is terminal and base station is predefined, or is notified to terminal by system message by base station.

Based on any of the above-described embodiment, the method also includes：

Described base station is fed back to according to corresponding A CK/NACK indicated by the RAR grant of the terminal of NACK Schedule information, again receive ACK/NACK be fed back to the Msg3 that the terminal of NACK resends.

A kind of terminal provided in an embodiment of the present invention, including：

Determining module, for corresponding with the RNTI being exclusively used in ACK/NACK feedback according to RA-RNTI Relation, determines that the RA-RNTI of the terminal belonging to itself is corresponding and is exclusively used in what ACK/NACK fed back RNTI；

Downstream message acquisition module, for using the described RNTI being exclusively used in ACK/NACK feedback, inspection Survey down control channel, to obtain the downstream message for carrying Msg3 corresponding ACK/NACK feedback；

Processing module, feeds back under described for the corresponding ACK/NACK of Msg3 according to described terminal Position in row message, the ACK/NACK obtaining the Msg3 of described terminal from described downstream message is anti- Feedback.

In force, described processing module obtains the Msg3's of described terminal from described downstream message Before ACK/NACK feedback, it is additionally operable to：

Determine that the corresponding ACK/NACK of Msg3 of described terminal feeds back the position in described downstream message Put.

In force, as the first preferred implementation, described processing module determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback, including：

Position in RAR message for the accidental access response RAR according to described terminal, determines described end Position in described downstream message for the Msg3 corresponding ACK/NACK feedback at end；

As the preferred implementation of second, described processing module determines that the Msg3 of described terminal corresponds to Position in described downstream message for the ACK/NACK feedback, including：

The identification information of the preamble sequence according to described terminal, determines the Msg3 of described terminal Position in described downstream message for the corresponding ACK/NACK feedback；

As the third preferred implementation, described processing module determines that the Msg3 of described terminal corresponds to Position in described downstream message for the ACK/NACK feedback, including：

Narrow band information that the PRB that used according to described terminal transmission Msg3, transmission Msg3 are located, with And at least one information in the transmission pilot tone circular shift information that used of Msg3, determine described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback.

Based on any of the above-described embodiment, described terminal also includes：

Retransmission module, when being fed back to NACK for the ACK/NACK of the Msg3 in described terminal, presses According to the schedule information indicated by RAR grant, again transmit the Msg3 of described terminal.

A kind of base station provided in an embodiment of the present invention, including：

Receiver module, for receiving the Msg3 that at least two terminals send；

Feedback information generation module, the Msg3 for producing described at least two terminals is corresponding ACK/NACK feeds back；

Mapping block, for reflecting the Msg3 corresponding ACK/NACK feedback of described at least two terminals It is mapped in downstream message；

Determining module, for the RA-RNTI according to corresponding to described at least two terminals be exclusively used in The corresponding relation of the RNTI of ACK/NACK feedback, determines that described RA-RNTI is corresponding and is exclusively used in The RNTI of ACK/NACK feedback；

Sending module, for descending being disappeared to described using the described RNTI being exclusively used in ACK/NACK feedback Breath is scrambled, and passes through down control channel, sends the downstream message after scrambling.

In force, as the first preferred implementation, described mapping block specifically for：

According to position in RAR message for the corresponding RAR of described at least two terminals, by described at least two The Msg3 corresponding ACK/NACK feedback of individual terminal is mapped in downstream message；

As the preferred implementation of second, described mapping block specifically for：

The identification information of the preamble sequence according to described at least two terminals, by described at least two terminals Msg3 corresponding ACK/NACK feedback be mapped in downstream message；

As the third preferred implementation, described mapping block specifically for：

The arrowband that PRB, the transmission Msg3 being used according to described at least two terminal transmission Msg3 is located At least one information in information and the transmission pilot tone circular shift information that used of Msg3, will be described The Msg3 corresponding ACK/NACK feedback of at least two terminals is mapped in downstream message.

Based on any of the above-described embodiment, described receiver module is additionally operable to：

It is fed back to the scheduling letter indicated by RAR grant of the terminal of NACK according to corresponding A CK/NACK Breath, again receives ACK/NACK and is fed back to the Msg3 that the terminal of NACK resends.

Another kind terminal provided in an embodiment of the present invention, including：Transceiver and being connected with described transceiver At least one processor, wherein：

Described processor, for reading the program in memorizer, executes following process：

According to the corresponding relation of the RA-RNTI and RNTI being exclusively used in ACK/NACK feedback, determination is come from The corresponding RNTI being exclusively used in ACK/NACK feedback of the RA-RNTI of the terminal belonging to body；Using described It is exclusively used in the RNTI of ACK/NACK feedback, detects down control channel, be used for carrying Msg3 to obtain The downstream message of corresponding ACK/NACK feedback；Corresponding according to the Msg3 of described terminal Position in described downstream message for the ACK/NACK feedback, obtains described terminal from described downstream message Msg3 ACK/NACK feedback；

Described transceiver, for receiving and sending data under the control of described processor.

In force, described processor obtains the Msg3's of described terminal from described downstream message Before ACK/NACK feedback, also execute following process：

In force, as the first preferred implementation, described computing device determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback, including：

As the preferred implementation of second, described computing device determines Msg3 pair of described terminal Position in described downstream message for the ACK/NACK feedback answered, including：

As the third preferred implementation, described computing device determines Msg3 pair of described terminal Position in described downstream message for the ACK/NACK feedback answered, including：

Based on any of the above-described embodiment, described transceiver also executes following process：

When the ACK/NACK of the Msg3 of described terminal is fed back to NACK, should according to described terminal-pair The schedule information indicated by RAR grant, again transmit the Msg3 of described terminal.

Another kind base station provided in an embodiment of the present invention, including：Transceiver and be connected with this transceiver At least one processor, wherein：

Transceiver executes following process：Receive the Msg3 that at least two terminals send；

Processor, for reading the program in memorizer, executes following process：

Produce the Msg3 corresponding ACK/NACK feedback of described at least two terminals；By described at least two The Msg3 corresponding ACK/NACK feedback of individual terminal is mapped in downstream message；According to described at least two The corresponding relation of the RA-RNTI corresponding to the individual terminal and RNTI being exclusively used in ACK/NACK feedback, really Make the corresponding RNTI being exclusively used in ACK/NACK feedback of described RA-RNTI；It is exclusively used in using described The RNTI of ACK/NACK feedback scrambles to described downstream message, and under controlling described transceiver to pass through Row control channel, sends the downstream message after scrambling.

In force, as the first preferred implementation, described process implement body executes following process：

As the preferred implementation of second, described process implement body executes following process：

As the third preferred implementation, described process implement body executes following process：

A kind of communication system provided in an embodiment of the present invention, including：

Base station, for receiving the Msg3 that at least two terminals send, and produces described at least two terminals Msg3 corresponding ACK/NACK feedback；Will be corresponding for the Msg3 of described at least two terminals ACK/NACK feedback is mapped in downstream message；According to corresponding to described at least two terminals The corresponding relation of the RA-RNTI and RNTI being exclusively used in ACK/NACK feedback, determines described The corresponding RNTI being exclusively used in ACK/NACK feedback of RA-RNTI；It is exclusively used in using described The RNTI of ACK/NACK feedback scrambles to described downstream message, and passes through down control channel, sends out Send the downstream message after scrambling；

Terminal, for the corresponding relation according to the RA-RNTI and RNTI being exclusively used in ACK/NACK feedback, Determine the corresponding RNTI being exclusively used in ACK/NACK feedback of the RA-RNTI of described terminal；Using institute State the RNTI being exclusively used in ACK/NACK feedback, detect down control channel, be used for carrying Msg3 to obtain The downstream message of corresponding ACK/NACK feedback；Corresponding according to the Msg3 of described terminal Position in described downstream message for the ACK/NACK feedback, obtains described terminal from described downstream message Msg3 ACK/NACK feedback.

Embodiments provide and a kind of be exclusively used in correspondingly by the RA-RNTI with terminal The Msg3's of down control channel transmission terminal of RNTI scrambling of ACK/NACK feedback The scheme of ACK/NACK feedback is it is achieved that the group of ACK/NACK feedback to the Msg3 of multiple terminals Broadcasting, thus improve feedback efficiency, saving system resource.

Brief description

Fig. 1 is the schematic flow sheet of competition random access procedure；

Fig. 2 is a kind of schematic diagram of the accidental access method of end side provided in an embodiment of the present invention；

Fig. 3 be carrying RAR provided in an embodiment of the present invention DSCH Downlink Shared Channel in different terminals RAR Mapping mode schematic diagram；

Fig. 4 is the Msg3 corresponding ACK/NACK feedback of the first terminal provided in an embodiment of the present invention The schematic diagram of the mapping mode in downstream message；

Fig. 5 is the Msg3 corresponding ACK/NACK feedback of second terminal provided in an embodiment of the present invention The schematic diagram of the mapping mode in downstream message；

Fig. 6 is the schematic diagram of the PRB using during terminal transmission Msg3 provided in an embodiment of the present invention；

Fig. 7 is the Msg3 corresponding ACK/NACK feedback of the third terminal provided in an embodiment of the present invention The schematic diagram of the mapping mode in downstream message；

Fig. 8 is a kind of schematic diagram of the accidental access method of end side provided in an embodiment of the present invention；

Fig. 9 is the schematic diagram of the first terminal provided in an embodiment of the present invention；

Figure 10 is the schematic diagram of the first base station provided in an embodiment of the present invention；

Figure 11 is the schematic diagram of second terminal provided in an embodiment of the present invention；

Figure 12 is the schematic diagram of second base station provided in an embodiment of the present invention；

Figure 13 is the schematic diagram of communication system provided in an embodiment of the present invention.

Specific embodiment

With reference to Figure of description, the embodiment of the present invention is described in further detail.It should be appreciated that herein Described embodiment is merely to illustrate and explains the present invention, is not intended to limit the present invention.

A kind of accidental access method of end side provided in an embodiment of the present invention, as shown in Fig. 2 the method bag Include following process：

S21, terminal according to RA-RNTI and be exclusively used in ACK/NACK feedback RNTI corresponding relation, Determine the corresponding RNTI being exclusively used in ACK/NACK feedback of the RA-RNTI of this terminal；

S22, terminal, using the RNTI being exclusively used in ACK/NACK feedback determining, detect descending control Channel, to obtain the downstream message for carrying Msg3 corresponding ACK/NACK feedback；

S23, terminal are fed back in this downstream message according to the corresponding ACK/NACK of Msg3 of this terminal Position, obtains the ACK/NACK feedback of the Msg3 of this terminal from this downstream message.

In the embodiment of the present invention, terminal is according to the RA-RNTI and RNTI being exclusively used in ACK/NACK feedback Corresponding relation, determine the RA-RNTI of this terminal corresponding be exclusively used in ACK/NACK feedback RNTI；Using the RNTI being exclusively used in ACK/NACK feedback determining, detect down control channel, To obtain the downstream message for carrying Msg3 corresponding ACK/NACK feedback；According to this terminal Position in this downstream message for the Msg3 corresponding ACK/NACK feedback, obtaining from this downstream message should The ACK/NACK feedback of the Msg3 of terminal.Embodiments provide a kind of by with terminal The down control channel that RA-RNTI is exclusively used in the RNTI scrambling of ACK/NACK feedback correspondingly passes The scheme of the ACK/NACK feedback of the Msg3 of defeated terminal is it is achieved that to the Msg3's of multiple terminals The multicast of ACK/NACK feedback, thus improve feedback efficiency, saves system resource.

In the embodiment of the present invention, RA-RNTI is closed with the corresponding of the RNTI being exclusively used in ACK/NACK feedback Being is terminal and base station is predefined, or notifies to terminal by base station by system message, such as by being System chunk (System Information Block, SIB) notifies.

Specifically, the embodiment of the present invention do not limit RA-RNTI be exclusively used in ACK/NACK feedback RNTI Corresponding relation specific implementation, this corresponding relation can be real using the corresponding relation list shown in table 1 Existing；

Table 1

RA-RNTI	AN-RNTI (is exclusively used in the RNTI of ACK/NACK feedback)
		RA-RNTI-1	AN-RNTI-1
RA-RNTI-2	AN-RNTI-2

RA-RNTI-3	AN-RNTI-3
		RA-RNTI-4	AN-RNTI-4
RA-RNTI-5	AN-RNTI-5
		RA-RNTI-6	AN-RNTI-6
RA-RNTI-7	AN-RNTI-7
		RA-RNTI-8	AN-RNTI-8
RA-RNTI-9	AN-RNTI-9
		RA-RNTI-10	AN-RNTI-10
……	……

This corresponding relation can also be realized by the way of equation below：AN-RNTI=RA-RNTI+X, its In, AN-RNTI represents that the RNTI being exclusively used in ACK/NACK feedback, X represent RA-RNTI deviant.

In the embodiment of the present invention, the down control channel being detected in S22 is to strengthen Physical Downlink Control Channel (Enhanced PDCCH, EPDCCH).

In the embodiment of the present invention, the down control channel being detected in S22 transmits in public search space.

In the embodiment of the present invention, the downstream message getting in S22 is to be exclusively used in transmitting ACK/NACK The Downlink Control Information (Downlink Control Information, DCI) of feedback, wherein, this DCI bag Information containing M-bit, this M-bit information is divided into N number of information field, each in this N number of information field Information field is respectively intended to carry an ACK/NACK feedback.

Specifically, downstream message always sends according to fixed size, for example, always send according to M-bit, Wherein M-bit is divided into N number of region, and each region in this N number of region is used for carrying one ACK/NACK feeds back, and in once sending, in this downstream message, the ACK/NACK of actual bearer is anti- Feedback number, with Msg2 in using RA-RNTI scrambling and in same Physical Downlink Shared Channel Transmission RAR number (i.e. using RA-RNTI scrambling and in same Physical Downlink Shared Channel The terminal number of transmission RAR) identical.If the RAR number deficiency of transmission is N number of, then N number of area Other regions in domain are set to 0 occupy-place, indicate no information.

In force, in S23, terminal obtains the ACK/NACK of the Msg3 of this terminal from downstream message Before feedback, also include：

Terminal determines position in downstream message for the Msg3 of this terminal corresponding ACK/NACK feedback.

Further, terminal determines that the corresponding ACK/NACK of the Msg3 of this terminal feeds back in downstream message In position, including following three kinds of preferred implementations：

Mode 1, terminal are according to the RAR of this terminal in RAR message (being subsequently referred to as Msg2) Position, determines that the corresponding ACK/NACK of Msg3 of this terminal feeds back the position in downstream message；

Wherein, sequence side in downstream message for the Msg3 of the different terminals corresponding ACK/NACK feedback Sortord in Msg2 for the formula RAR corresponding with this terminal is identical, and Msg2 is by this terminal RA-RNTI scrambling (the scrambling initialization carrying the PDSCH of Msg2 is determined by RA-RNTI)；Separately Outward, the PDCCH/EPDCCH dispatching this Msg2 (carries this Msg2 schedule information PDCCH/EPDCCH, schedule information is used for indicating the information such as transfer resource and the transmission means of Msg2) Also scrambled using this RA-RNTI.

Illustrate it is assumed that using identical PRACH time-frequency domain resources (RA-RNTI determining is identical) Different terminals the RAR of the RAR comprising multiple terminals that carried in Physical Downlink Shared Channel of RAR As shown in figure 3, wherein, the RAR of terminal 1 is in the 1st position, i.e. Fig. 2 for mapping mode in message In MAC RAR1, the RAR of terminal 2 the 2nd position, i.e. MAC RAR2 in Fig. 2, eventually The RAR at end 3 is in the 3rd position, i.e. MAC RAR3 in Fig. 2, the RAR sequence of other-end By that analogy.Mapping in downstream message for the Msg3 corresponding ACK/NACK feedback of this different terminals Sortord in Msg2 for the mode RAR corresponding with this terminal is identical, carries the Msg3 of different terminals The downstream message of corresponding ACK/NACK feedback is as shown in figure 4, the Msg3 of terminal 1 is corresponding The 1st position, the Msg3 corresponding ACK/NACK feedback of terminal 2 is for ACK/NACK feedback 2 positions, the corresponding ACK/NACK of Msg3 of terminal 3 feeds back the 3rd position, other-end The sequence of Msg3 corresponding ACK/NACK feedback is by that analogy.

Mode 2, terminal, according to the identification information of the preamble sequence of this terminal, determine this terminal Position in downstream message for the Msg3 corresponding ACK/NACK feedback；

Wherein, each ACK/NACK in downstream message feed back A bit information before position or A bit information after person is the mark of the preamble sequence that this ACK/NACK feeds back corresponding terminal Information, A is natural number.

Illustrate, in this downstream message, the ACK/NACK of each terminal feeds back the A before position Bit information or A bit information afterwards are an instructions field, and this instructions field is used for indicating this terminal The identification information (as the numbering of preamble sequence, index etc.) of preamble sequence, as shown in figure 5, The instructions field instruction terminal of the A bit information before the Msg3 corresponding ACK/NACK feedback of terminal 1 The index of 1 preamble sequence, i.e. preamble index1；The Msg3 of terminal 2 is corresponding The rope of the preamble sequence of the instructions field instruction terminal 2 of A bit information before ACK/NACK feedback Draw, i.e. preamble index2；A ratio before the Msg3 corresponding ACK/NACK feedback of terminal 3 The index of the preamble sequence of the instructions field instruction terminal 3 of special information, i.e. preamble index3, other The corresponding ACK/NACK of Msg3 of terminal feeds back by that analogy.

Physical Resource Block (the Physical Resource that mode 3, terminal are used according to this terminal transmission Msg3 Block, PRB), the narrow band information that is located of transmission Msg3 and the transmission pilot tone that used of Msg3 follow At least one information in ring shift information, determines that the corresponding ACK/NACK of Msg3 of this terminal is anti- Position in downstream message for the feedback.

Specifically, position in downstream message for the Msg3 of the different terminals corresponding ACK/NACK feedback This different terminals that are ordered as transmit the numbering of PRB that Msg3 used from big to small or from small to large suitable Sequence.Due to definition carry different terminals Msg3 corresponding ACK/NACK feedback downstream message when, According to all arrowbands sequence of positions definition in system, then terminal employ which narrow band transmission its Msg3, then the Msg3 of this terminal corresponding ACK/NACK feedback be just mapped in right in this downstream message On the position answered.Position in downstream message for the Msg3 corresponding ACK/NACK feedback of different terminals Sequence transmit, with this different terminals, the sequence consensus of pilot tone circular shift information that Msg3 is used.

Illustrate it is assumed that the PRB that terminal 1～terminal 6 transmission Msg3 is used is in same subband PRB1～PRB6, as shown in fig. 6, terminal can also be using the PRB in different sub-band, the present invention is real Apply example this not to be defined；Base station according to the numbering order from small to large of PRB, by terminal 1～terminal 6 Msg3 corresponding ACK/NACK feedback is mapped in downstream message, as shown in fig. 7, using PRB1 Terminal 1 the corresponding ACK/NACK of Msg3 feed back the 1st position, using the terminal 2 of PRB2 The corresponding ACK/NACK of Msg3 feed back the 2nd position, using the Msg3 of the terminal 3 of PRB3 Corresponding ACK/NACK feeds back in the 3rd position, the corresponding ACK/NACK of Msg3 of other-end The sequence of feedback is by that analogy.

Based on any of the above-described embodiment, in S23, terminal obtains the Msg3's of this terminal from downstream message After ACK/NACK feedback, also include：

If the ACK/NACK of the Msg3 of terminal is fed back to NACK, this terminal is corresponding according to this terminal Schedule information indicated by RAR grant, transmits the Msg3 of this terminal again, this RAR grant i.e. this end Entrained UL grant in itself RAR that end obtains in Msg2, schedule information includes transfer resource position Put, the information such as modulation coding mode.

Based on same inventive concept, in the embodiment of the present invention, additionally provide a kind of Stochastic accessing side of base station side Method, because the principle of the method solve problem is corresponding with the accidental access method of above-mentioned end side, the therefore party The enforcement of method may refer to the enforcement of end side method, repeats no more in place of repetition.

A kind of base station side accidental access method provided in an embodiment of the present invention, as shown in figure 8, the method includes Following process：

S81, base station receive the Msg3 that at least two terminals send, and produce this at least two terminal The corresponding ACK/NACK of Msg3 feeds back；

Corresponding for the Msg3 of this at least two terminal ACK/NACK feedback is mapped to descending by S82, base station In message；

S83, RA-RNTI according to corresponding to this at least two terminal for the base station be exclusively used in ACK/NACK The corresponding relation of the RNTI of feedback, determines that this RA-RNTI corresponding at least two terminals is corresponding It is exclusively used in the RNTI of ACK/NACK feedback；

S84, base station are entered to this downstream message using the RNTI being exclusively used in ACK/NACK feedback determining Row scrambling, and pass through down control channel, send the downstream message after scrambling.

In the embodiment of the present invention, the down control channel in S84 is EPDCCH.

In the embodiment of the present invention, the down control channel in S84 transmits in public search space.

In the embodiment of the present invention, the downstream message in S82 and S84 is to be exclusively used in transmitting ACK/NACK The DCI of feedback, wherein, this DCI comprises M-bit information, and this M-bit information is divided into N number of letter Breath domain, each information field in this N number of information field is respectively intended to carry an ACK/NACK feedback.

In force, corresponding for the Msg3 of this at least two terminal ACK/NACK is fed back by S82 end base station It is mapped in downstream message, including following three kinds of preferred implementations：

Mode one is corresponding with aforesaid way 1, specially：

Base station position in Msg2 according to the corresponding RAR of this at least two terminal, by this at least two The Msg3 corresponding ACK/NACK feedback of terminal is mapped in downstream message；

Wherein, sequence side in downstream message for the Msg3 of the different terminals corresponding ACK/NACK feedback Sortord in Msg2 for the formula RAR corresponding with this terminal is identical, and Msg2 is scrambled by RA-RNTI (the scrambling initialization carrying the PDSCH of Msg2 is determined by RA-RNTI)；In addition, dispatching this Msg2 PDCCH/EPDCCH (carry the PDCCH/EPDCCH of this Msg2 schedule information, scheduling letter Cease the information such as transfer resource and transmission means for indicating Msg2) also scrambled using this RA-RNTI.

Mode two is corresponding with aforesaid way 2, specially：

Base station according to the identification information of the preamble sequence of this at least two terminal, by this at least two terminal Msg3 corresponding ACK/NACK feedback be mapped in downstream message；

Mode three is corresponding with aforesaid way 3, specially：

It is narrow that PRB, the transmission Msg3 that base station is used according to this at least two terminal transmission Msg3 is located At least one information in information and the transmission pilot tone circular shift information that used of Msg3, by institute The Msg3 corresponding ACK/NACK feedback stating at least two terminals is mapped in downstream message.

Based on any of the above-described embodiment, the method also includes：

Base station is fed back to the tune indicated by RAR grant of the terminal of NACK according to corresponding A CK/NACK Degree information, again receives ACK/NACK and is fed back to the Msg3 that the terminal of NACK resends, this RAR Grant is entrained UL grant in the RAR of this terminal that eNB sends in Msg2, schedule information Including transfer resource position, the information such as modulation coding mode.

Further, base station receives ACK/NACK and is fed back to the Msg3 that the terminal of NACK resends Afterwards, the Msg3 corresponding ACK/NACK feedback that the terminal receiving is retransmitted by base station is mapped to descending In message, wherein, the terminal that the corresponding ACK/NACK of last Msg3 is fed back to ACK is corresponding ACK/NACK feedback on the position in downstream message for the ACK/NACK feedback is set to 0, as accounting for Position information.

Below by a complete random access procedure, to illustrate that the present invention is real from the interaction of base station and terminal The scheme of example offer is provided.Detailed process is as follows：

(1) Msg1 transmission：

1) terminal subframe n1～n2 (comprise at least one subframe, with PRACH whether repeat transmission and Iterative transfer times are mated, the interval concept of following subframe with similar herein) in, in identical PRACH In time-frequency domain resources, terminal 1 repeats to have sent preamble1 that (i.e. the numbering of preamble sequence is Preamble1), terminal 2 repeats to have sent preamble2, and (i.e. the numbering of preamble sequence is Preamble2) terminal 3 repeats to have sent preamble3 (i.e. the numbering of preamble sequence is preamble3)；

2) in subframe n1～n2, the reception in corresponding PRACH time-frequency domain resources is above-mentioned for base station Preamble sequence, merges the preamble sequence in multiple subframes, to obtain terminal 1, terminal 2, end Preamble1, preamble2, preamble 3 that end 3 sends respectively.

(2) Msg2 transmission：

1) base station is according to identical PRACH time-frequency domain resources, according to formula RA-RNTI=1+ T_id+10*f_id, wherein：T_id is the numbering of corresponding first subframe of specific PRACH resource, 0≤t_id <10；F_id is the numbering of the specific PRACH resource of sub- frame in, according to frequency domain ascending order numbering, 0≤f_id< 6, it is calculated identical RA-RNTI-1；Base station in subframe n3～n4, in public search space, Repeat to send by down control channel and (Downlink is permitted using the descending scheduling of this RA-RNTI-1 scrambling Grant, DL grant), in subframe n5～n6, according to the descending control letter being scrambled by this RA-RNTI-1 Schedule information in road, in corresponding resource, by DSCH Downlink Shared Channel repeat send carry at least terminal 1, 2nd, the message of the RAR of terminal 3, wherein mapping in this DSCH Downlink Shared Channel for the RAR of different terminals Mode is as shown in Figure 3；

2) terminal 1, terminal 2 and terminal 3 determine RA-RNTI according to above-mentioned base station the same manner；In son In frame n3～n4, in public search space, detection is using the descending control letter of this RA-RNTI-1 scrambling Road, merges the information in multiple subframes, obtains the schedule information that this down control channel is carried, according to this Schedule information, receives RAR by DSCH Downlink Shared Channel in subframe n5～n6, merges in multiple subframes Information, obtains the RAR that this DSCH Downlink Shared Channel is carried, and according to itself institute in this DSCH Downlink Shared Channel The numbering of the preamble sequence sending, determines its corresponding RAR information；Wherein, terminal 1 determines it In the 1st position, i.e. MAC RAR1 in Fig. 3, terminal 2 determines its RAR the 2nd position to RAR Put, i.e. MAC RAR2 in Fig. 3, terminal 3 determines its RAR the 3rd position, that is, in Fig. 3 MAC RAR3, the RAR of other-end sorts by that analogy.

(3)Msg3：

Transmit for the first time：

1) terminal 1, terminal 2, terminal 3 are taken according in the respective RAR determining in Msg2 respectively The schedule information of the UL grant of band, repeats to transmit respective Msg3, such as terminal 1 in subframe n7～n8 In subband 1 PRB2 transmission, using modulation coding mode (Modulation and Coding Scheme, MCS) 1, PRB3 transmission in subband 1 for the terminal 2, using MCS2, terminal 3 is in subband 1 PRB5 transmission, using MCS3, the PRB in one of subband is as shown in Figure 6；It is not precluded within not With subband and by the way of identical or different DMRS cyclic shifts；

2) corresponding, base station is also according to terminal 1, terminal 2, terminal 3 corresponding UL grant respectively Schedule information, receive the Msg3 of each terminal in subframe n7～n8, merge and obtain final Msg3 message, And produce each terminal Msg3 ACK/NACK feedback, be mapped to according to particular order be exclusively used in transmit Ad-hoc location in the DCI of ACK/NACK feedback：Sequential Mapping for example according to each terminal RAR ACK/NACK, then as shown in figure 4, or, according to as shown in figure 5, the ACK/NACK of each terminal Information all corresponds to an instructions field, and this instructions field is used for indicating the numbering of the preamble sequence of different terminals, Or, according to PRB numbering (also can be from big to small) Sequential Mapping from small to large, different sub-band can also It is placed in same DCI, Sequential Mapping, as shown in Figure 7；Base station according to RA-RNTI-1 be exclusively used in ACK/NACK feedback RNTI (hereinafter referred to as AN-RNTI) corresponding relation, determine with The corresponding AN-RNTI-1 of RA-RNTI-1；Base station in subframe n9～n10, in public search space, Repeat to send the down control channel being scrambled by this AN-RNTI-1, this down control channel carries above-mentioned special The DCI of the corresponding ACK/NACK of the Msg3 for carrying terminal feedback；

3) terminal 1, terminal 2, terminal 3 determine AN-RNTI-1 according to the same manner of above-mentioned base station side, In subframe n9～n10, in public search space, detection is using the descending control of AN-RNTI-1 scrambling Channel, the information in multiple subframes is merged, and obtains the DCI of loading ACK/NACK feedback, according to Base station side mapping ACK/consistent method of NACK feedback determines concrete position in this DCI for its feedback information Put；Determine whether to retransmit according to feedback information further, if ACK, then Msg3 acceptance is correct, no Need to retransmit, otherwise, in subframe n11～n12, according to the schedule information of first time Msg3 transmission, weight Pass this Msg3 (i.e. non-self-adapting re-transmission)；

For example, the feedback information of terminal 1 is ACK, terminal 2 and terminal 3 be fed back to NACK, then Terminal 2 and terminal 3 need to retransmit its Msg3；The step receiving terminal 2 in above-mentioned 2) is then repeated in base station With the Msg3 retransmission information of terminal 3, and produce ACK/NACK feedback, map in the same way Send in DCI, that is, the ACK/NACK mapping position in DCI for the feedback of terminal 2 and terminal 3 is not Change, now, the ACK/NACK due to not needing feedback terminal 1 feeds back, counterpart terminal 1 in DCI ACK/NACK feedback can be set to 0, as occupy-place information；Accordingly, end side, terminal 1 is not Need to monitor the down control channel of AN-RNTI-1 scrambling again, terminal 2 and terminal 3 also need to according to upper State 3) in same steps obtain its Msg3 re-transmission ACK/NACK feedback, by that analogy, until Msg3 transmits maximum retransmission that is correct or reaching Msg3.

Said method handling process can be realized with software program, and this software program can be stored in storage medium In, when the software program of storage is called, execute said method step.

Based on same inventive concept, in the embodiment of the present invention, additionally provide a kind of terminal, because this terminal solves The principle of problem is similar to a kind of accidental access method of the end side shown in above-mentioned Fig. 2, therefore this terminal Implement to may refer to the enforcement of the method shown in Fig. 2, repeat no more in place of repetition.

A kind of terminal provided in an embodiment of the present invention, as shown in figure 9, this terminal includes：

Determining module 91, for according to the RA-RNTI and RNTI's being exclusively used in ACK/NACK feedback Corresponding relation, determining the RA-RNTI of the terminal belonging to itself, corresponding to be exclusively used in ACK/NACK anti- The RNTI of feedback；

Downstream message acquisition module 92, for being exclusively used in, using described, the RNTI that ACK/NACK feeds back, Detection down control channel, to obtain descending the disappearing for carrying Msg3 corresponding ACK/NACK feedback Breath；

Processing module 93, feeds back described for the corresponding ACK/NACK of Msg3 according to described terminal Position in downstream message, obtains the ACK/NACK of the Msg3 of described terminal from described downstream message Feedback.

In force, described processing module 93 obtains the Msg3's of described terminal from described downstream message Before ACK/NACK feedback, it is additionally operable to：

In force, as the first preferred implementation, described processing module 93 determines described end Position in described downstream message for the Msg3 corresponding ACK/NACK feedback at end, including：

As the preferred implementation of second, described processing module 93 determines the Msg3 of described terminal Position in described downstream message for the corresponding ACK/NACK feedback, including：

As the third preferred implementation, described processing module 93 determines the Msg3 of described terminal Position in described downstream message for the corresponding ACK/NACK feedback, including：

Retransmission module, when being fed back to NACK for the ACK/NACK of the Msg3 in described terminal, presses According to the schedule information indicated by described terminal corresponding RAR grant, again transmit the Msg3 of described terminal.

Based on same inventive concept, in the embodiment of the present invention, additionally provide a kind of base station, because this base station solves The principle of problem is similar to a kind of accidental access method of the base station side shown in above-mentioned Fig. 8, therefore this base station Implement to may refer to the enforcement of the method shown in Fig. 8, repeat no more in place of repetition.

A kind of base station provided in an embodiment of the present invention, as shown in Figure 10, this base station includes：

Receiver module 101, for receiving the Msg3 that at least two terminals send；

Feedback information generation module 102, the Msg3 for producing described at least two terminals is corresponding ACK/NACK feeds back；

Mapping block 103, for feeding back the corresponding ACK/NACK of Msg3 of described at least two terminals It is mapped in downstream message；

Determining module 104, for the RA-RNTI according to corresponding to described at least two terminals be exclusively used in The corresponding relation of the RNTI of ACK/NACK feedback, determines that described RA-RNTI is corresponding and is exclusively used in The RNTI of ACK/NACK feedback；

Sending module 105, for using described be exclusively used in ACK/NACK feedback RNTI to described descending Message is scrambled, and passes through down control channel, sends the downstream message after scrambling.

In force, as the first preferred implementation, described mapping block 103 specifically for：

As the preferred implementation of second, described mapping block 103 specifically for：

As the third preferred implementation, described mapping block 103 specifically for：

Based on any of the above-described embodiment, described receiver module 101 is additionally operable to：

With reference to preferred hardware configuration, to the structure of terminal provided in an embodiment of the present invention, processing mode Illustrate.

As shown in figure 11, terminal provided in an embodiment of the present invention include transceiver 111 and with this transceiver At least one processor 112 of 111 connections, wherein：

Processor 112, for reading the program in memorizer 113, executes following process：

Transceiver 111, for receiving and sending data under the control of processor 112.

In fig. 11, bus architecture (being represented with bus 110), bus 110 can include any amount The bus of interconnection and bridge, one or more process that bus 110 will include being represented by general processor 112 The various circuit of the memorizer of device and memorizer 113 representative link together.Bus 110 can also be by such as Various other circuit of ancillary equipment, manostat and management circuit or the like link together, and these are all It is it is known in the art, therefore, no longer it is described further herein.EBI 114 is total Interface is provided between line 110 and transceiver 111.Transceiver 111 can be an element or many Individual element, such as multiple receptors and transmitter, are provided for being led to various other devices over a transmission medium The unit of letter.For example：Transceiver 111 receives external data from other equipment.Transceiver 111 is used for locating Data is activation after reason device 112 process is to other equipment.Depending on the property of computing system, may also provide User interface 115, such as keypad, display, speaker, mike, stick.

Processor 112 is responsible for bus 110 and common process, as aforementioned described operation general operation system System.And memorizer 113 can be used for storing the data that processor 112 is used in execution operation.

Optionally, processor 112 can be central processing unit (Central Processing Unit, CPU), Application-specific IC (Application Specific Integrated Circuit, ASIC), scene can be compiled Journey gate array (Field Programmable Gate Array, FPGA), or CPLD (Complex Programmable Logic Device, CPLD).

In force, described processor 112 obtains the Msg3's of described terminal from described downstream message Before ACK/NACK feedback, also execute following process：

In force, as the first preferred implementation, described processor 112 execution is determined described Position in described downstream message for the Msg3 corresponding ACK/NACK feedback of terminal, including：

As the preferred implementation of second, the Msg3 of described terminal is determined in described processor 112 execution Position in described downstream message for the corresponding ACK/NACK feedback, including：

As the third preferred implementation, the Msg3 of described terminal is determined in described processor 112 execution Position in described downstream message for the corresponding ACK/NACK feedback, including：

Based on any of the above-described embodiment, described transceiver 111 also executes following process：

With reference to preferred hardware configuration, to the structure of base station provided in an embodiment of the present invention, processing mode Illustrate.

As shown in figure 12, base station provided in an embodiment of the present invention include transceiver 121 and with this transceiver At least one processor 122 of 121 connections, wherein：

Transceiver 121 executes following process：Receive the Msg3 that at least two terminals send；

Processor 122, for reading the program in memorizer 123, executes following process：

Produce the Msg3 corresponding ACK/NACK feedback of described at least two terminals；By described at least two The Msg3 corresponding ACK/NACK feedback of individual terminal is mapped in downstream message；According to described at least two The corresponding relation of the RA-RNTI corresponding to the individual terminal and RNTI being exclusively used in ACK/NACK feedback, really Make the corresponding RNTI being exclusively used in ACK/NACK feedback of described RA-RNTI；It is exclusively used in using described The RNTI of ACK/NACK feedback scrambles to described downstream message, and controls described transceiver 121 By down control channel, send the downstream message after scrambling.

In fig. 12, bus architecture (being represented with bus 120), bus 120 can include any amount The bus of interconnection and bridge, bus 120 by the one or more processors including being represented by processor 122 and The various circuit of the memorizer that memorizer 123 represents link together.Bus 120 can also be by such as periphery Various other circuit of equipment, manostat and management circuit or the like link together, and these are all these Well known to field, therefore, no longer it is described further herein.EBI 124 is in bus 120 Interface is provided and transceiver 121 between.Transceiver 121 can be an element or multiple element, Such as multiple receptors and transmitter, provide the list for communicating over a transmission medium with various other devices Unit.The data that treated device 122 is processed is transmitted on the radio medium by antenna 125, further, Antenna 125 also receiving data simultaneously transfers data to processor 122.

Processor 122 is responsible for bus 120 and common process, may also provide various functions, including Regularly, peripheral interface, voltage-regulation, power management and other control functions.And memorizer 123 is permissible It is used for storing the data that processor 122 is used in execution operation.

Optionally, processor 122 can be CPU, ASIC, FPGA or CPLD.

In force, as the first preferred implementation, described processor 122 specifically executes following mistake Journey：

As the preferred implementation of second, described processor 122 specifically executes following process：

As the third preferred implementation, described processor 122 specifically executes following process：

Based on any of the above-described embodiment, described transceiver 121 also executes following process：

Based on same inventive concept, the embodiment of the present invention additionally provides a kind of communication system, as shown in figure 13, This system includes：

Base station 131, for receiving the Msg3 that at least two terminals send, and produces described at least two eventually The Msg3 corresponding ACK/NACK feedback at end；Will be corresponding for the Msg3 of described at least two terminals ACK/NACK feedback is mapped in downstream message；According to corresponding to described at least two terminals The corresponding relation of the RA-RNTI and RNTI being exclusively used in ACK/NACK feedback, determines described The corresponding RNTI being exclusively used in ACK/NACK feedback of RA-RNTI；It is exclusively used in using described The RNTI of ACK/NACK feedback scrambles to described downstream message, and passes through down control channel, sends out Send the downstream message after scrambling；

Terminal 132, for corresponding with the RNTI being exclusively used in ACK/NACK feedback according to RA-RNTI Relation, determines the corresponding RNTI being exclusively used in ACK/NACK feedback of the RA-RNTI of described terminal； Using the described RNTI being exclusively used in ACK/NACK feedback, detect down control channel, be used for obtaining Carry the downstream message of Msg3 corresponding ACK/NACK feedback；Corresponding according to the Msg3 of described terminal Position in described downstream message for the ACK/NACK feedback, obtains described terminal from described downstream message Msg3 ACK/NACK feedback.

Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can be using complete hardware embodiment, complete software embodiment or knot Close the form of the embodiment of software and hardware aspect.And, the present invention can adopt and wherein wrap one or more Computer-usable storage medium containing computer usable program code (including but not limited to disk memory, CD-ROM, optical memory etc.) the upper computer program implemented form.

The present invention is to produce with reference to method according to embodiments of the present invention, equipment (system) and computer program The flow chart of product and/or block diagram are describing.It should be understood that can by computer program instructions flowchart and / or block diagram in 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.These computer program instructions can be provided to general purpose computer, special-purpose computer, embed The processor of formula datatron or other programmable data processing device is to produce a machine so that passing through to calculate The instruction of the computing device of machine or other programmable data processing device produces for realizing in flow chart one The device of the function of specifying in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and computer or other programmable datas can be guided to process and set So that being stored in this computer-readable memory in the standby computer-readable memory working in a specific way Instruction produce and include the manufacture of command device, the realization of this command device is in one flow process or multiple of flow chart The function of specifying in flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, makes Obtain and series of operation steps is executed on computer or other programmable devices to produce computer implemented place Reason, thus the instruction of execution is provided for realizing in flow chart one on computer or other programmable devices The step of the function of specifying in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know base This creative concept, then can make other change and modification to these embodiments.So, appended right will Ask and be intended to be construed to including preferred embodiment and fall into being had altered and changing of the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the present invention Bright spirit and scope.So, if the present invention these modification and modification belong to the claims in the present invention and Within the scope of its equivalent technologies, then the present invention is also intended to comprise these changes and modification.

Claims

1. a kind of accidental access method is it is characterised in that the method includes：

Terminal according to random access radio network temporary mark RA-RNTI be exclusively used in positive acknowledgment ACK/ The corresponding relation of the RNTI of Negative Acknowledgement NACK feedback, determines that the RA-RNTI of described terminal corresponds to Be exclusively used in ACK/NACK feedback RNTI；

2. the method for claim 1 is it is characterised in that described terminal is from described downstream message Before the ACK/NACK feedback of the Msg3 obtaining described terminal, also include：

3. method as claimed in claim 2 is it is characterised in that described terminal determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback, including：

4. method as claimed in claim 2 is it is characterised in that described terminal determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback, including：

5. method as claimed in claim 2 is it is characterised in that described terminal determines described terminal Position in described downstream message for the Msg3 corresponding ACK/NACK feedback, including：

6. the method for claim 1 is it is characterised in that described down control channel is enhancing thing Reason down control channel EPDCCH.

7. the method for claim 1 is it is characterised in that described downstream message is to be exclusively used in transmitting The Downlink Control Information DCI of ACK/NACK feedback, wherein, described DCI comprises M-bit information, institute State M-bit information and be divided into N number of information field, each information field in described N number of information field is used respectively To carry an ACK/NACK feedback.

8. the method for claim 1 is it is characterised in that described down control channel is searched public Transmit in rope space.

9. the method for claim 1 it is characterised in that RA-RNTI be exclusively used in ACK/NACK The corresponding relation of the RNTI of feedback is described terminal and base station is predefined, or passes through system by base station Message informing gives described terminal.

10. the method as described in any one of claim 1～9 is it is characterised in that described terminal is from described After the ACK/NACK feedback of the Msg3 obtaining described terminal in row message, also include：

A kind of 11. accidental access methods are it is characterised in that the method includes：

12. methods as claimed in claim 11 are it is characterised in that described base station is by described at least two The Msg3 corresponding ACK/NACK feedback of terminal is mapped in described downstream message, including：

13. methods as claimed in claim 11 are it is characterised in that described base station is by described at least two The Msg3 corresponding ACK/NACK feedback of terminal is mapped in described downstream message, including：

14. methods as claimed in claim 11 are it is characterised in that described base station is by described at least two The Msg3 corresponding ACK/NACK feedback of terminal is mapped in described downstream message, including：

15. methods as claimed in claim 11 are it is characterised in that described down control channel is EPDCCH.

16. methods as claimed in claim 11 are it is characterised in that described downstream message is to be exclusively used in passing The DCI of defeated ACK/NACK feedback, wherein, described DCI comprises M-bit information, described M-bit Information is divided into N number of information field, and each information field in described N number of information field is respectively intended to carry one Individual ACK/NACK feedback.

17. methods as claimed in claim 11 are it is characterised in that described down control channel is public Transmit in search space.

18. methods as claimed in claim 11 it is characterised in that RA-RNTI be exclusively used in The corresponding relation of the RNTI of ACK/NACK feedback is terminal and base station is predefined, or is led to by base station Cross system message to notify to terminal.

19. methods as described in any one of claim 11～18 are it is characterised in that the method also includes：

A kind of 20. terminals are it is characterised in that this terminal includes：

21. terminals as claimed in claim 20 are it is characterised in that described processing module is from described descending Before the ACK/NACK feedback of the Msg3 obtaining described terminal in message, it is additionally operable to：

22. terminals as claimed in claim 21 it is characterised in that described processing module determine described Position in described downstream message for the Msg3 corresponding ACK/NACK feedback of terminal, including：

23. terminals as claimed in claim 21 it is characterised in that described processing module determine described Position in described downstream message for the Msg3 corresponding ACK/NACK feedback of terminal, including：

24. terminals as claimed in claim 21 it is characterised in that described processing module determine described Position in described downstream message for the Msg3 corresponding ACK/NACK feedback of terminal, including：

25. terminals as claimed in claim 20 are it is characterised in that described down control channel is EPDCCH.

26. terminals as claimed in claim 20 are it is characterised in that described downstream message is to be exclusively used in passing The DCI of defeated ACK/NACK feedback, wherein, described DCI comprises M-bit information, described M-bit Information is divided into N number of information field, and each information field in described N number of information field is respectively intended to carry one Individual ACK/NACK feedback.

27. terminals as claimed in claim 20 are it is characterised in that described down control channel is public Transmit in search space.

28. terminals as claimed in claim 20 it is characterised in that RA-RNTI be exclusively used in The corresponding relation of the RNTI of ACK/NACK feedback is described terminal and base station is predefined, or by base Stand and notified to described terminal by system message.

29. terminals as described in any one of claim 20～28 are it is characterised in that described terminal also includes：

A kind of 30. base stations are it is characterised in that this base station includes：

Receiver module, for receiving the Msg3 that at least two terminals send；

31. base stations as claimed in claim 30 it is characterised in that described mapping block specifically for：

32. base stations as claimed in claim 30 it is characterised in that described mapping block specifically for：

33. base stations as claimed in claim 30 it is characterised in that described mapping block specifically for：

34. base stations as claimed in claim 30 are it is characterised in that described down control channel is EPDCCH.

35. base stations as claimed in claim 30 are it is characterised in that described downstream message is to be exclusively used in passing The DCI of defeated ACK/NACK feedback, wherein, described DCI comprises M-bit information, described M-bit Information is divided into N number of information field, and each information field in described N number of information field is respectively intended to carry one Individual ACK/NACK feedback.

36. base stations as claimed in claim 30 are it is characterised in that described down control channel is public Transmit in search space.

37. base stations as claimed in claim 30 it is characterised in that RA-RNTI be exclusively used in The corresponding relation of the RNTI of ACK/NACK feedback is terminal and base station is predefined, or is led to by base station Cross system message to notify to terminal.

38. base stations as described in any one of claim 30～37 it is characterised in that described receiver module also For：

A kind of 39. communication systems are it is characterised in that this system includes：