CN106455113B

CN106455113B - A kind of accidental access method, equipment and system

Info

Publication number: CN106455113B
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: 2019-09-17
Anticipated expiration: 2035-08-11
Also published as: CN106455113A; WO2017024912A1

Abstract

The invention discloses a kind of accidental access method, equipment and systems, for solving under coverage enhancement scene, if the Msg3 for each terminal uses an independent UL grant to carry out ACK/NACK feedback, will lead to the larger problem of feedback overhead.Method includes: corresponding relationship of the terminal according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback, determines the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI of the terminal；It is exclusively used in the RNTI of ACK/NACK feedback using this, detects down control channel, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；The position in the downstream message is fed back according to the corresponding ACK/NACK of the Msg3 of the terminal, the ACK/NACK feedback of the Msg3 of the terminal is obtained from the downstream message, to save system resource.

Description

A kind of accidental access method, equipment and system

Technical field

Accidental access method, equipment the present invention relates to field of communication technology, in particular under a kind of coverage enhancement scene And system.

Background technique

Competition random access refers to that (User Terminal, also known as user are not set for terminal for base station (eNodeB, eNB) It is standby, User Equipment, UE) distribution private resource, the random access procedure initiated at random by terminal completely.Competition connects at random Entering to be suitable for institute, there are five types of scenes, wireless heterogeneous networks (Radio Resource Control, RRC) connection are established, RRC The scene that connection reconstruction and upstream data reach, random access be entirely it is spontaneous by terminal, eNB does not have any prior information； Scene is reached for switching and downlink data, terminal indicates to initiate random access according to eNB, it is, in general, that eNB can be selected preferentially Non-competing random access just can instruction terminal initiation competition only in the case where non-competing random access resource not enough distributes Random access.It competes four steps of random access procedure point to complete, as shown in Figure 1, each step is known as a piece of news (Message, abbreviation Msg), this four steps are known as Msg1~Msg4 in relevant criterion.Wherein:

(1) Msg1: leading (preamble) sequence.

The message is upstream message, is sent by terminal, and eNB is received, and is carried on Physical Random Access Channel (Physical Random Access Channel, PRACH) in send.For competing random access, the preamble sequence that terminal is sent is Specific preamble set in randomly selected one, different preamble sequences have different identification informations, i.e., Preamble index (index).

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

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

Msg2 is the response for the random access that eNB initiates terminal after receiving Msg1, it is necessary to be rung in random access It answers in window and sends.Random access response window starting point is first available downlink subframe for meeting n+3, and n is preamble sequence hair The last one subframe sent, length are 2~10ms, are specified in system message by eNB.

The DSCH Downlink Shared Channel that Msg2 is defined in media access control (Media Access Control, MAC) layer (Downlink Shared Channel, DL-SCH) carrying, corresponds to Physical Downlink Shared Channel (Physical in physical layer Downlink Shared Channel, PDSCH).One Msg2 can respond the random access request of multiple terminals, i.e., simultaneously The RAR of multiple terminals is carried, therefore Msg2 does not have hybrid automatic repeat-request (Hybrid Automatic Repeat ReQuest, HARQ) process, that is, there is no repeat request process.

ENB is with random access radio network temporary identifier (the Random Access by transmitting in public search space Radio Network Temporary Identifier, RA-RNTI) scrambled Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) scheduling Msg2, RA-RNTI by send Msg1 PRACH running time-frequency resource position It determines；Identical RA-RNTI is calculated using the terminal of identical PRACH running time-frequency resource, RAR information package is same It is sent in RAR message, which transmits in the DSCH Downlink Shared Channel by the scrambled PDCCH scheduling of the RA-RNTI, And the DSCH Downlink Shared Channel is also scrambled using the RA-RNTI.

Content in Msg2 includes: backoff (rollback) parameter, the mark of preamble sequence corresponding with Msg1 letter (UL grant is also known as RAR in physical layer for the uplink scheduling license of breath, uplink Timing Advance (TA), Msg3 Grant), interim (Temporary) cell-level radio network temporary identifier (Cell- Radio Network Temporary Identifier, C-RNTI), abbreviation TC-RNTI.Wherein, if backoff parameter is used to indicate this random access failure, The time delay mean value of initiation terminal next time random access.

Terminal, which passes through, sends the RA- that PRACH time-frequency domain resources used in preamble sequence determine certainly in Msg1 RNTI, identification carries the RAR message (Msg2 sent in DL-SCH) of itself RAR, according to itself in the RAR message The identification information of the preamble sequence sent in Msg1 determines the RAR for being sent to oneself.If terminal is not properly received To Msg2, then the time delay for initiating random access next time is determined according to the time delay limitation of backoff parameter, in addition selection is random Access-in resource initiates random access next time.After reaching largest random access number, the MAC layer of terminal reports at random to rrc layer Access problem triggers Radio Link Failure (Radio Link Failure, RLF) process.

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

The message is upstream message, is sent by terminal, and eNB is received.

Terminal is after receiving Msg2, the UL grant included in the RAR of itself of acquisition (i.e. RAR grant) The uplink carried out on indicated ascending resource, i.e., physically according to the transmitting scheduling information in the RAR grant of itself Row is shared channel (Physical Uplink Shared Channel, PUSCH), and the uplink which corresponds to MAC layer is shared Channel (Uplink Shared Channel, UL-SCH).Using HARQ procedure, ascending resource minimum can transmit 56 bits.

The initial transmission of Msg3 is uniquely to need MAC layer to handle, therefore Msg3 by the uplink of MAC layer dynamic dispatching It is at least spaced 6ms with Msg2, the re-transmission of other Msg3 is completed by PDCCH, which passes in public search space It is defeated, and scrambled using TC-RNTI.

Include different contents in Msg3 for different scenes:

It is initially accessed: carrying the RRC connection request message that rrc layer generates, do not include Non-Access Stratum (Non Access Stratum, NAS) message；The corresponding logic channel of MAC layer be common control channel (Common Control Channel, CCCH it) transmits；

Connection reconstruction: the RRC connection reconstruction request that rrc layer generates is carried, NAS message is not included；It patrols MAC layer is corresponding Collecting channel is CCCH；

Switching: the RRC handoff completion message that transmission rrc layer generates is with exclusive control in the corresponding logic channel of MAC layer Channel (Dedicate Control Channel, DCCH)；The C-RNTI of transmission terminal；If resource is enough, may include Row buffer status report (BSR)；

Uplink and downlink data reach: at least C-RNTI of transmission terminal.

(4) Msg4: contention resolved.

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

ENB and terminal complete final contention resolved by Msg4.The content of Msg4 is corresponding with the content of Msg3.

With the rise of Internet of Things, machine is supported in long evolving system (Long Term Evolution, LTE) system Device class communication (Machine Type Communication, MTC) is increasingly taken seriously.It sets up the project in 3GPP Release 13 Enhance project for the physical layer of MTC.One MTC device (also referred to as MTC terminal) may have a variety of machines and machine Part of properties in (Machine to Machine, M2M) communication characteristic, such as Hypomobility, transmitted data amount it is small, to communication when Prolong it is insensitive, require extremely low power dissipation etc..

In existing network, operator finds the terminal to work under certain scenes, for example works in basement, market or build The terminal for building corner, since wireless signal is seriously blocked, signal can not be communicated by very big decaying with network, and The networking cost of network can be greatly increased for the depth covering for carrying out network under these scenes.By test, it is believed that needs pair Existing covering carries out a degree of enhancing.Realize coverage enhancement, a kind of more feasible method is to existing channel using weight Multiple transmission or similar techniques, theoretically can be by repeating transmission acquisition one to the progress of existing physical channel tens times to several hundred times Determine the covering gain of degree.

When carrying out coverage enhancement transmission, in order to improve transmission performance, need to carry out multiplicating transmission.For it is above-mentioned with Machine access procedure, the dispatch and message itself of the message in each step and accordingly feedback information require to carry out weight Multiple transmission.For public search space, a large amount of repetition transmission causes to support multiple terminals while carry out control information to pass It is defeated；On the other hand, it is had determined in MTC system and does not support physical mixing retransmission indicating chanel (Physical Hybrid-ARQ Indicator Channel, PHICH) transmission, if it is certainly true to use an independent UL grant to carry out for each Msg3 (ACKnowledgement, ACK)/negative confirmation (Negative ACKnowledgement, NACK) feedback is recognized, due to UL Grant is mainly used for schedule data transmission, wherein comprising largely information field relevant to data transmission, such as resource allocation, modulation The information such as grade, only the new information instructions field of 1 bit is for feeding back ACK/NACK, therefore, even if only needing in UL grant Want feeding back ACK/NACK without indicating the information such as resource allocation, modulation levels, it is also desirable to it repeats to send a UL grant, Feedback overhead is larger, needs to consider the new feedback system of the ACK/NACK Feedback Design to Msg3, to improve feedback efficiency, saves Resource overhead.

Summary of the invention

The embodiment of the invention provides a kind of accidental access method, equipment and systems, for solving under coverage enhancement scene, If the Msg3 for each terminal uses an independent UL grant to carry out ACK/NACK feedback, feedback overhead will lead to Larger problem.

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

Terminal determines the terminal according to the corresponding relationship of the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback The corresponding RNTI for being exclusively used in ACK/NACK feedback of RA-RNTI；

The terminal detects down control channel, using the RNTI for being exclusively used in ACK/NACK feedback to be used for Carry the downstream message of the corresponding ACK/NACK feedback of Msg3；

The terminal feeds back the position in the downstream message according to the corresponding ACK/NACK of Msg3 of the terminal, from The ACK/NACK feedback of the Msg3 of the terminal is obtained in the downstream message.

In an implementation, the ACK/NACK that the terminal obtains the Msg3 of the terminal from the downstream message feeds back it Before, further includes:

The terminal determines that the corresponding ACK/NACK of the Msg3 of the terminal feeds back the position in the downstream message.

In an implementation, as the first preferred implementation, the terminal determines that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message, comprising:

Position of the terminal according to the random access response RAR of the terminal in RAR message, determines the terminal The corresponding ACK/NACK of Msg3 feed back the position in the downstream message；

Wherein, sortord and the end of the corresponding ACK/NACK feedback of the Msg3 of different terminals in the downstream message Hold sortord of the corresponding RAR in RAR message identical, the RAR message is scrambled by the RA-RNTI.

As second of preferred implementation, the terminal determines the corresponding ACK/NACK of the Msg3 of the terminal Feed back the position in the downstream message, comprising:

The terminal determines the Msg3 of the terminal according to the identification information of the preamble sequence of the terminal Corresponding ACK/NACK feeds back the position in the downstream message；

Wherein, the A bit information or later before each ACK/NACK feedback position in the downstream message A bit information be the ACK/NACK feed back corresponding terminal preamble sequence identification information, A is natural number.

As the third preferred implementation, the terminal determines the corresponding ACK/NACK of the Msg3 of the terminal Feed back the position in the downstream message, comprising:

Narrowband where terminal Physical Resource Block PRB according to used in the terminal transmission Msg3, transmission Msg3 At least one of pilot tone circular shift information information used in information and transmission Msg3, determines the terminal The corresponding ACK/NACK of Msg3 feeds back the position in the downstream message.

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

In the embodiment of the present invention, the downstream message is the DCI for being exclusively used in transmission ACK/NACK feedback, wherein the DCI Comprising M-bit information, the M-bit information is divided into N number of information field, each information field difference in N number of information field For carrying an ACK/NACK feedback.

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

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

Based on any of the above-described embodiment, the terminal obtains the ACK/ of the Msg3 of the terminal from the downstream message After NACK feedback, further includes:

If the ACK/NACK of the Msg3 of the terminal is fed back to NACK, the terminal is permitted according to the corresponding RAR of the terminal Can scheduling information indicated by grant, transmit the Msg3 of the terminal again.

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

Base station receives the Msg3 of at least two terminals transmission, and the Msg3 for generating at least two terminal is corresponding ACK/NACK feedback；

The corresponding ACK/NACK feedback of the Msg3 of at least two terminal is mapped in downstream message by the base station；

Base station RA-RNTI according to corresponding at least two terminal be exclusively used in ACK/NACK feedback The corresponding relationship of RNTI determines the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI；

The base station scrambles the downstream message using the RNTI for being exclusively used in ACK/NACK feedback, and passes through Down control channel, the downstream message after sending scrambling.

In an implementation, as the first preferred implementation, the base station is by Msg3 pairs of at least two terminal The ACK/NACK feedback answered is mapped in the downstream message, comprising:

Position of the base station according to the corresponding RAR of at least two terminal in RAR message, by described at least two The corresponding ACK/NACK feedback of the Msg3 of terminal is mapped in downstream message；

As second of preferred implementation, the base station is by the corresponding ACK/ of Msg3 of at least two terminal NACK feedback is mapped in the downstream message, comprising:

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

As the third preferred implementation, the base station is by the corresponding ACK/ of Msg3 of at least two terminal NACK feedback is mapped in the downstream message, comprising:

Narrowband letter where base station PRB according to used in at least two terminal transmissions Msg3, transmission Msg3 It ceases and transmits at least one of pilot tone circular shift information used in Msg3 information, by least two terminal The corresponding ACK/NACK feedback of Msg3 is mapped in downstream message.

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

In the embodiment of the present invention, the corresponding relationship of RA-RNTI and the RNTI for being exclusively used in ACK/NACK feedback are terminal and base It stands predetermined, or is notified by system message to terminal by base station.

Based on any of the above-described embodiment, this method further include:

The base station is fed back to scheduling information indicated by the RAR grant of the terminal of NACK according to corresponding A CK/NACK, Again it receives ACK/NACK and is fed back to the Msg3 that the terminal of NACK retransmits.

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

Determining module, for the corresponding relationship according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback, determination is come from The corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI of terminal belonging to body；

Downstream message obtains module, for being exclusively used in the RNTI of ACK/NACK feedback, detection downlink control letter described in use Road, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；

Processing module feeds back the position in the downstream message for the corresponding ACK/NACK of Msg3 according to the terminal It sets, the ACK/NACK feedback of the Msg3 of the terminal is obtained from the downstream message.

In an implementation, the processing module obtained from the downstream message Msg3 of the terminal ACK/NACK it is anti- Before feedback, it is also used to:

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

In an implementation, as the first preferred implementation, the processing module determines Msg3 pairs of the terminal The ACK/NACK answered feeds back the position in the downstream message, comprising:

According to position of the random access response RAR of the terminal in RAR message, Msg3 pairs for determining the terminal The ACK/NACK answered feeds back the position in the downstream message；

As second of preferred implementation, the processing module determines the corresponding ACK/ of the Msg3 of the terminal NACK feeds back the position in the downstream message, comprising:

According to the identification information of the preamble sequence of the terminal, determine that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message；

As the third preferred implementation, the processing module determines the corresponding ACK/ of the Msg3 of the terminal NACK feeds back the position in the downstream message, comprising:

According to PRB used in the terminal transmission Msg3, the narrow band information where transmission Msg3 and transmission Msg3 institute At least one of the pilot tone circular shift information used information determines the corresponding ACK/NACK feedback of the Msg3 of the terminal Position in the downstream message.

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

Based on any of the above-described embodiment, the terminal further include:

Retransmission module, it is signified according to RAR grant when the ACK/NACK for the Msg3 in the terminal is fed back to NACK The scheduling information shown transmits the Msg3 of the terminal again.

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

Receiving module, for receiving the Msg3 of at least two terminals transmission；

Feedback information generation module, the corresponding ACK/NACK feedback of Msg3 for generating at least two terminal；

Mapping block, for the corresponding ACK/NACK feedback of the Msg3 of at least two terminal to be mapped to downstream message In；

Determining module for the RA-RNTI according to corresponding at least two terminal and is exclusively used in ACK/NACK feedback RNTI corresponding relationship, determine the RA-RNTI it is corresponding be exclusively used in ACK/NACK feedback RNTI；

Sending module, the RNTI for being exclusively used in ACK/NACK feedback described in use scramble the downstream message, And the downstream message by down control channel, after sending scrambling.

In an implementation, as the first preferred implementation, the mapping block is specifically used for:

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

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

According to the identification information of the preamble sequence of at least two terminal, by the Msg3 of at least two terminal Corresponding ACK/NACK feedback is mapped in downstream message；

As the third preferred implementation, the mapping block is specifically used for:

According to PRB used in at least two terminal transmissions Msg3, the narrow band information where transmission Msg3, Yi Jichuan At least one of pilot tone circular shift information information used in defeated Msg3, the Msg3 of at least two terminal is corresponding ACK/NACK feedback is mapped in downstream message.

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

Based on any of the above-described embodiment, the receiving module is also used to:

It is fed back to scheduling information indicated by the RAR grant of the terminal of NACK according to corresponding A CK/NACK, is received again ACK/NACK is fed back to the Msg3 that the terminal of NACK retransmits.

It is provided in an embodiment of the present invention another kind terminal, comprising: transceiver and connect with the transceiver at least one A processor, in which:

The processor executes following process for reading the program in memory:

According to the corresponding relationship of the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback, the terminal belonging to itself is determined RA-RNTI it is corresponding be exclusively used in ACK/NACK feedback RNTI；Use the RNTI for being exclusively used in ACK/NACK feedback, detection Down control channel, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；According to the terminal The corresponding ACK/NACK of Msg3 feeds back the position in the downstream message, and the terminal is obtained from the downstream message The ACK/NACK of Msg3 is fed back；

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

In an implementation, the processor obtains the ACK/NACK feedback of the Msg3 of the terminal from the downstream message Before, following process is also executed:

In an implementation, as the first preferred implementation, the processor executes the Msg3 for determining the terminal Corresponding ACK/NACK feeds back the position in the downstream message, comprising:

As second of preferred implementation, the corresponding ACK/ of the Msg3 of the terminal is determined in the processor execution NACK feeds back the position in the downstream message, comprising:

As the third preferred implementation, the corresponding ACK/ of the Msg3 of the terminal is determined in the processor execution NACK feeds back the position in the downstream message, comprising:

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

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

When the ACK/NACK of the Msg3 of the terminal is fed back to NACK, according to the corresponding RAR grant institute of the terminal The scheduling information of instruction transmits the Msg3 of the terminal again.

It is provided in an embodiment of the present invention another kind base station, comprising: transceiver and connect with the transceiver at least one Processor, in which:

Transceiver executes following process: receiving the Msg3 of at least two terminals transmission；

Processor executes following process for reading the program in memory:

Generate the corresponding ACK/NACK feedback of Msg3 of at least two terminal；By the Msg3 of at least two terminal Corresponding ACK/NACK feedback is mapped in downstream message；According to RA-RNTI corresponding at least two terminal with it is dedicated In the corresponding relationship of the RNTI of ACK/NACK feedback, determines that the RA-RNTI is corresponding and be exclusively used in what ACK/NACK was fed back RNTI；The downstream message is scrambled using the RNTI for being exclusively used in ACK/NACK feedback, and controls the transceiver Downstream message by down control channel, after sending scrambling.

In an implementation, as the first preferred implementation, the processing implement body executes following process:

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

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

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

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

Base station for receiving the Msg3 of at least two terminals transmission, and generates Msg3 pairs of at least two terminal The ACK/NACK feedback answered；The corresponding ACK/NACK feedback of the Msg3 of at least two terminal is mapped in downstream message； According to the corresponding relationship of RA-RNTI corresponding at least two terminal and RNTI for being exclusively used in ACK/NACK feedback, determine The corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI out；It is exclusively used in what ACK/NACK was fed back using described RNTI scrambles the downstream message, and the downstream message by down control channel, after sending scrambling；

Terminal determines the end for the corresponding relationship according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback The corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI at end；Use the RNTI for being exclusively used in ACK/NACK feedback, inspection Down control channel is surveyed, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；According to the terminal The corresponding ACK/NACK of Msg3 feeds back the position in the downstream message, and the terminal is obtained from the downstream message The ACK/NACK of Msg3 is fed back.

The embodiment of the invention provides a kind of RA-RNTI by with terminal, to be exclusively used in ACK/NACK correspondingly anti- The scheme of the ACK/NACK feedback of the Msg3 of the scrambled down control channel transmission terminal of the RNTI of feedback, realized to multiple ends The multicast of the ACK/NACK feedback of the Msg3 at end saves system resource to improve feedback efficiency.

Detailed description of the invention

Fig. 1 is the flow diagram for competing random access procedure；

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

Fig. 3 is the mapping side of the RAR of different terminals in the DSCH Downlink Shared Channel of carrying RAR provided in an embodiment of the present invention The schematic diagram of formula；

Fig. 4 is that the corresponding ACK/NACK of Msg3 of the first terminal provided in an embodiment of the present invention is fed back in downstream message Mapping mode schematic diagram；

Fig. 5 is that the corresponding ACK/NACK of Msg3 of second of terminal provided in an embodiment of the present invention is fed back in downstream message Mapping mode schematic diagram；

The schematic diagram for the PRB that Fig. 6 is used when being terminal transmission Msg3 provided in an embodiment of the present invention；

Fig. 7 is that the corresponding ACK/NACK of Msg3 of the third terminal provided in an embodiment of the present invention is fed back in downstream message Mapping mode schematic diagram；

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

Figure 12 is the schematic diagram of second of 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

The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.It should be appreciated that described herein Embodiment only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.

The accidental access method of a kind of terminal side provided in an embodiment of the present invention, as shown in Fig. 2, this method includes following mistake Journey:

S21, terminal determine the terminal according to the corresponding relationship of the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback RA-RNTI it is corresponding be exclusively used in ACK/NACK feedback RNTI；

S22, terminal detect down control channel using the RNTI for being exclusively used in ACK/NACK feedback determined, to obtain For carrying the downstream message of the corresponding ACK/NACK feedback of Msg3；

S23, terminal feed back the position in the downstream message according to the corresponding ACK/NACK of the Msg3 of the terminal, from this under The ACK/NACK feedback of the Msg3 of the terminal is obtained in row message.

In the embodiment of the present invention, terminal according to RA-RNTI be exclusively used in ACK/NACK feedback RNTI corresponding relationship, Determine the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI of the terminal；ACK/ is exclusively used in using what is determined The RNTI of NACK feedback, detects down control channel, is disappeared with obtaining for carrying the downlink that the corresponding ACK/NACK of Msg3 is fed back Breath；The position in the downstream message is fed back according to the corresponding ACK/NACK of the Msg3 of the terminal, is obtained from the downstream message The ACK/NACK of the Msg3 of the terminal is fed back.The embodiment of the invention provides a kind of by corresponding with the RA-RNTI of terminal Be exclusively used in ACK/NACK feedback the scrambled down control channel transmission terminal of RNTI Msg3 ACK/NACK feedback side Case realizes and saves system to improve feedback efficiency to the multicast of the ACK/NACK feedback of the Msg3 of multiple terminals Resource.

In the embodiment of the present invention, the corresponding relationship of RA-RNTI and the RNTI for being exclusively used in ACK/NACK feedback are terminal and base It stands predetermined, or is notified such as to pass through system information block (System to terminal by system message by base station Information Block, SIB) notice.

Specifically, the embodiment of the present invention does not limit the corresponding relationship of RA-RNTI with the RNTI for being exclusively used in ACK/NACK feedback Specific implementation, which can be realized using corresponding relationship list shown in table 1；

Table 1

RA-RNTI	AN-RNTI (RNTI for being exclusively used in 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
……	……

The corresponding relationship can also be realized by the way of following formula: AN-RNTI=RA-RNTI+X, wherein AN- RNTI indicates that the RNTI for being exclusively used in ACK/NACK feedback, X indicate RA-RNTI deviant.

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

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

In the embodiment of the present invention, the downstream message got in S22 is the downlink for being exclusively used in transmission ACK/NACK feedback It controls information (Downlink Control Information, DCI), wherein the DCI includes M-bit information, M-bit letter Breath is divided into N number of information field, and each information field in N number of information field is respectively intended to one ACK/NACK feedback of carrying.

Specifically, downstream message is always sent according to fixed size, such as is always sent according to M-bit, wherein M-bit quilt It is divided into N number of region, each region in N number of region should in primary send for carrying an ACK/NACK feedback The number of the ACK/NACK feedback of actual bearer, uses RA-RNTI scrambled and in the same object with Msg2 in downstream message The number of the RAR transmitted in reason DSCH Downlink Shared Channel (uses RA-RNTI scrambled and in the same Physical Downlink Shared Channel The terminal number of middle transmission RAR) it is identical.If RAR number of transmission is insufficient N number of, other regions in N number of region are set to 0 occupy-place indicates no information.

In an implementation, in S23, terminal is before the ACK/NACK for the Msg3 for obtaining the terminal in downstream message feedback, also Include:

Terminal determines that the corresponding ACK/NACK of the Msg3 of the terminal feeds back the position in downstream message.

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

The position of mode 1, terminal according to the RAR of the terminal in RAR message (subsequent referred to as Msg2), determines the end The corresponding ACK/NACK of the Msg3 at end feeds back the position in downstream message；

Wherein, sortord and the terminal pair of the corresponding ACK/NACK feedback of the Msg3 of different terminals in downstream message Sortord of the RAR answered in Msg2 is identical, and Msg2 (carries the PDSCH's of Msg2 by the RA-RNTI scrambling of the terminal Scrambling initialization is determined by RA-RNTI)；In addition, the PDCCH/EPDCCH for dispatching the Msg2 (carries the Msg2 scheduling information PDCCH/EPDCCH, scheduling information are used to indicate the information such as transfer resource and the transmission mode of Msg2) also use the RA-RNTI Scrambling.

It illustrates, it is assumed that use the different terminals of identical PRACH time-frequency domain resources (i.e. determining RA-RNTI is identical) Mapping mode such as Fig. 3 institute of the RAR in the RAR message for the RAR comprising multiple terminals that Physical Downlink Shared Channel is carried Show, wherein MAC RAR1 of the RAR of terminal 1 in the 1st position, i.e. Fig. 2, the RAR of terminal 2 is the 2nd position, i.e. Fig. 2 In MAC RAR2, MAC RAR3 of the RAR of terminal 3 in the 3rd position, i.e. Fig. 2, the RAR of other terminals sort with such It pushes away.The corresponding ACK/NACK of the Msg3 of the different terminals feeds back the mapping mode RAR corresponding with the terminal in downstream message Sortord in Msg2 is identical, carries downstream message such as Fig. 4 institute of the corresponding ACK/NACK feedback of Msg3 of different terminals Show, the corresponding ACK/NACK feedback of the Msg3 of terminal 1 exists in the 1st position, the corresponding ACK/NACK feedback of the Msg3 of terminal 2 2nd position, the corresponding ACK/NACK feedback of the Msg3 of terminal 3 is in the 3rd position, the corresponding ACK/ of the Msg3 of other terminals The sequence and so on of NACK feedback.

Mode 2, terminal determine that the Msg3 of the terminal is corresponding according to the identification information of the preamble sequence of the terminal ACK/NACK feed back position in downstream message；

Wherein, the A bit information before each ACK/NACK feedback position in downstream message or A ratio later Special information is the identification information for the preamble sequence that the ACK/NACK feeds back corresponding terminal, and A is natural number.

For example, in the downstream message each terminal ACK/NACK feedback position before A bit information or A bit information after person is an instructions field, which is used to indicate the identification information of the preamble sequence of the terminal (such as number of preamble sequence, index), as shown in figure 5, the A before the corresponding ACK/NACK feedback of the Msg3 of terminal 1 The index of the preamble sequence of the instructions field instruction terminal 1 of bit information, i.e. preamble index1；The Msg3 of terminal 2 The index of the preamble sequence of the instructions field instruction terminal 2 of A bit information before corresponding ACK/NACK feedback, i.e., preamble index2；The instructions field instruction terminal 3 of A bit information before the corresponding ACK/NACK feedback of the Msg3 of terminal 3 Preamble sequence index, i.e. preamble index3, the Msg3 of other terminals corresponding ACK/NACK feedback are with such It pushes away.

Mode 3, terminal Physical Resource Block (the Physical Resource according to used in terminal transmission Msg3 Block, PRB), used in the narrow band information where transmission Msg3 and transmission Msg3 in pilot tone circular shift information extremely A kind of few information determines that the corresponding ACK/NACK of the Msg3 of the terminal feeds back the position in downstream message.

Specifically, position of the corresponding ACK/NACK feedback of the Msg3 of different terminals in downstream message is ordered as this not With the sequence of PRB used in terminal transmission Msg3 numbered from big to small or from small to large.Due to carrying different ends in definition It when the downstream message of the corresponding ACK/NACK feedback of the Msg3 at end, is defined according to all narrowband sequence of positions in system, So terminal has used its Msg3 of which narrow band transmission, then the corresponding ACK/NACK feedback of the Msg3 of the terminal is just mapped in this On corresponding position in downstream message.Position of the corresponding ACK/NACK feedback of the Msg3 of different terminals in downstream message The sequence consensus of sequence and pilot tone circular shift information used in different terminals transmission Msg3.

Illustrate, it is assumed that 1~terminal of terminal 6 transmit Msg3 used in PRB be the same subband in PRB1~ PRB6, as shown in fig. 6, the PRB in different sub-band also can be used in terminal, the embodiment of the present invention is defined not to this；Base station According to the sequence of PRB numbered from small to large, the corresponding ACK/NACK feedback of the Msg3 of 1~terminal of terminal 6 is mapped in downlink In message, as shown in fig. 7, the corresponding ACK/NACK of Msg3 using the terminal 1 of PRB1 is fed back the 1st position, PRB2 is used The corresponding ACK/NACK of Msg3 of terminal 2 feed back the 2nd position, use the corresponding ACK/ of Msg3 of the terminal 3 of PRB3 NACK feedback is in the 3rd position, the sequence and so on of the corresponding ACK/NACK feedback of the Msg3 of other terminals.

Based on any of the above-described embodiment, in S23 terminal obtained from downstream message the Msg3 of the terminal ACK/NACK it is anti- After feedback, further includes:

If the ACK/NACK of the Msg3 of terminal is fed back to NACK, the terminal is signified according to the corresponding RAR grant of the terminal The scheduling information shown transmits the Msg3 of the terminal again, in itself RAR that the RAR grant i.e. terminal obtains in Msg2 Entrained UL grant, scheduling information include transfer resource position, the information such as modulation coding scheme.

Based on the same inventive concept, a kind of accidental access method of base station side is additionally provided in the embodiment of the present invention, due to The principle that this method solves the problems, such as is corresponding with the accidental access method of above-mentioned terminal side, therefore the implementation of this method may refer to end The implementation of side approach, overlaps will not be repeated.

A kind of base station side accidental access method provided in an embodiment of the present invention, as shown in figure 8, this method includes following mistake Journey:

S81, base station receive the Msg3 of at least two terminals transmission, and the Msg3 for generating at least two terminal is corresponding ACK/NACK feedback；

The corresponding ACK/NACK feedback of the Msg3 of at least two terminal is mapped in downstream message by S82, base station；

S83, base station RA-RNTI according to corresponding at least two terminal and the RNTI for being exclusively used in ACK/NACK feedback Corresponding relationship, determine RA-RNTI corresponding at least two terminal it is corresponding be exclusively used in ACK/NACK feedback RNTI；

S84, base station scramble the downstream message using the RNTI for being exclusively used in ACK/NACK feedback determined, and lead to Down control channel is crossed, the downstream message after sending 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 the DCI for being exclusively used in transmission ACK/NACK feedback, Wherein, which includes M-bit information, which is divided into N number of information field, each information in N number of information field Domain is respectively intended to one ACK/NACK feedback of carrying.

In an implementation, the corresponding ACK/NACK feedback of the Msg3 of at least two terminal is mapped to downlink by the end base station S82 In message, preferred implementation is included the following three types:

It is mode one, corresponding with aforesaid way 1, specifically:

Position of the base station according to the corresponding RAR of at least two terminal in Msg2, by the Msg3 of at least two terminal Corresponding ACK/NACK feedback is mapped in downstream message；

Wherein, sortord and the terminal pair of the corresponding ACK/NACK feedback of the Msg3 of different terminals in downstream message Sortord of the RAR answered in Msg2 is identical, and Msg2 scrambles (the i.e. scrambling initialization of the PDSCH of carrying Msg2 by RA-RNTI It is determined by RA-RNTI)；In addition, the PDCCH/EPDCCH for dispatching the Msg2 (carries the PDCCH/ of the Msg2 scheduling information EPDCCH, scheduling information are used to indicate the information such as transfer resource and the transmission mode of Msg2) also scrambled using the RA-RNTI.

It is mode two, corresponding with aforesaid way 2, specifically:

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

It is mode three, corresponding with aforesaid way 3, specifically:

Base station PRB according to used at least two terminal transmission Msg3, transmission Msg3 where narrow band information and At least one of pilot tone circular shift information used in Msg3 information is transmitted, the Msg3 of at least two terminal is corresponding ACK/NACK feedback be mapped in downstream message.

Based on any of the above-described embodiment, this method further include:

Base station is fed back to scheduling information indicated by the RAR grant of the terminal of NACK according to corresponding A CK/NACK, again It receives ACK/NACK and is fed back to the Msg3 that the terminal of NACK retransmits, the end which sends in Msg2 Entrained UL grant in the RAR at end, scheduling information includes transfer resource position, the information such as modulation coding scheme.

Further, base station receives ACK/NACK and is fed back to after the Msg3 of terminal retransmission of NACK, and base station will connect The corresponding ACK/NACK feedback of the Msg3 that the terminal received retransmits is mapped in downstream message, wherein last Msg3 is corresponding The corresponding ACK/NACK of terminal that ACK/NACK is fed back to ACK feeds back the ACK/NACK feedback on the position in downstream message It is set to 0, as occupy-place information.

Below by a complete random access procedure, illustrate that the embodiment of the present invention is mentioned from the interaction of base station and terminal The scheme of confession.Detailed process is as follows:

(1) Msg1 is transmitted:

1) whether terminal (includes at least one subframe, repeats to transmit and repeat transmission time with PRACH in subframe n1~n2 Number matching, the concept in subframe section below with it is similar herein) in, in identical PRACH time-frequency domain resources, terminal 1 repetition It having sent preamble1 (i.e. the number of preamble sequence is preamble1), terminal 2 repeats to have sent preamble2, (i.e. the number of preamble sequence is preamble2) terminal 3 repeats to have sent preamble3 (the i.e. volume of preamble sequence Number be preamble3)；

2) reception above-mentioned preamble sequence of the base station in subframe n1~n2, in corresponding PRACH time-frequency domain resources Column, merge the preamble sequence in multiple subframes, with obtain preamble1 that terminal 1, terminal 2, terminal 3 send respectively, preamble2、preamble 3。

(2) Msg2 is transmitted:

1) base station is according to identical PRACH time-frequency domain resources, according to formula RA-RNTI=1+ t_id+10*f_id, In: t_id is the number of corresponding first subframe of specific PRACH resource, 0≤t_id < 10；F_id is specific in a subframe The number of PRACH resource is numbered according to frequency domain ascending order, and identical RA-RNTI-1 is calculated in 0≤f_id < 6；Base station is in son In frame n3~n4, in public search space, repeat to send using the scrambled downlink of the RA-RNTI-1 by down control channel Scheduling grant (Downlink grant, DL grant), in subframe n5~n6, according to by the scrambled downlink of the RA-RNTI-1 Scheduling information in control channel repeatedly sends carrying at least terminal 1,2, end by DSCH Downlink Shared Channel in corresponding resource The message of the RAR at end 3, wherein mapping mode of the RAR of different terminals in the DSCH Downlink Shared Channel 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 subframe n3~n4, In public search space, detection uses the scrambled down control channel of the RA-RNTI-1, merges the information in multiple subframes, obtains The scheduling information carried to the down control channel passes through the shared letter of downlink according to the scheduling information in subframe n5~n6 Road receives RAR, merges the information in multiple subframes, obtains the RAR that the DSCH Downlink Shared Channel is carried, and in the shared letter of the downlink The number of preamble sequence in road according to transmitted by itself determines its corresponding RAR information；Wherein, terminal 1 determines it MAC RAR1 of the RAR in the 1st position, i.e. Fig. 3, terminal 2 determine MAC RAR2 of its RAR in the 2nd position, i.e. Fig. 3, Terminal 3 determines MAC RAR3 of its RAR in the 3rd position, i.e. Fig. 3, the RAR sequence of other terminals and so on.

(3) Msg3:

It transmits for the first time:

1) terminal 1, terminal 2, terminal 3 are respectively according to the UL grant's carried in the respective RAR determined in Msg2 Scheduling information repeats to transmit respective Msg3, such as PRB2 transmission of the terminal 1 in subband 1 in subframe n7~n8, uses tune Coding mode (Modulation and Coding Scheme, MCS) 1 processed, PRB3 transmission of the terminal 2 in subband 1, uses MCS2, PRB5 transmission of the terminal 3 in subband 1, using MCS3, the PRB in one of subband is as shown in Figure 6；It is not precluded within Different sub-band and by the way of same or different DMRS cyclic shift；

2) correspondingly, base station is also according to terminal 1, terminal 2, the scheduling information of the corresponding UL grant of terminal 3, The Msg3 of each terminal is received in subframe n7~n8, merging obtains final Msg3 message, and generates the ACK/ of the Msg3 of each terminal NACK feedback is mapped to the specific position being exclusively used in the DCI of transmission ACK/NACK feedback: such as basis according to particular order The Sequential Mapping ACK/NACK of each terminal RAR, then as shown in figure 4, alternatively, according to as shown in figure 5, each terminal ACK/ NACK information all corresponds to an instructions field, which is used to indicate the number of the preamble sequence of different terminals, alternatively, According to PRB number, (can also be from big to small) Sequential Mapping, different sub-band can also be placed in the same DCI from small to large, sequence Mapping, as shown in Figure 7；Base station is according to RA-RNTI-1 and RNTI (the hereinafter referred to as AN- for being exclusively used in ACK/NACK feedback RNTI corresponding relationship) determines AN-RNTI-1 corresponding with RA-RNTI-1；Base station is searched in subframe n9~n10 public In rope space, repeat to send by the scrambled down control channel of the AN-RNTI-1, down control channel carrying is above-mentioned to be exclusively used in Carry the DCI of the corresponding ACK/NACK feedback of Msg3 of terminal；

3) terminal 1, terminal 2, terminal 3 determine AN-RNTI-1 according to the same manner of above-mentioned base station side, subframe n9~ In n10, in public search space, detection uses the scrambled down control channel of AN-RNTI-1, by the information in multiple subframes Merge, obtain loading ACK/NACK feedback DCI, determines that it is anti-according to consistent method is fed back with base station side mapping ACK/NACK Specific location of the feedforward information in the DCI；Further determine whether to retransmit according to feedback information, receive if it is ACK, Msg3 Correctly, it does not need to retransmit, otherwise, in subframe n11~n12, according to the scheduling information that first time Msg3 is transmitted, retransmits the Msg3 (i.e. non-adaptive re-transmission)；

For example, the feedback information of terminal 1 is ACK, terminal 2 and terminal 3 are fed back to NACK, then terminal 2 and terminal 3 need Retransmit its Msg3；Base station then repeat it is above-mentioned 2) in step receive the Msg3 retransmission information of terminal 2 and terminal 3, and generate ACK/ NACK feedback, is mapped in DCI sends in the same way, i.e. the ACK/NACK of terminal 2 and terminal 3 is fed back in DCI Mapping position does not change, at this point, due to the ACK/NACK feedback for not needing feedback terminal 1, the ACK/ of counterpart terminal 1 in DCI NACK feedback can be set to 0, as occupy-place information；Correspondingly, terminal side, terminal 1 no longer needs to monitor AN-RNTI-1 scrambled Down control channel, terminal 2 and terminal 3 also need according to it is above-mentioned 3) in same steps obtain its Msg3 re-transmission ACK/NACK Feedback, and so on, until Msg3 transmission is correct or reaches the maximum retransmission of Msg3.

Above method process flow can realize that the software program can store in storage medium with software program, when When the software program of storage is called, above method step is executed.

Based on the same inventive concept, a kind of terminal is additionally provided in the embodiment of the present invention, is solved the problems, such as due to the terminal Principle is similar to a kind of above-mentioned accidental access method of terminal side shown in Fig. 2, therefore the implementation of the terminal may refer to Fig. 2 institute The implementation for the method shown, overlaps will not be repeated.

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

Determining module 91 is determined for the corresponding relationship according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback The corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI of terminal belonging to itself；

Downstream message obtains module 92, for being exclusively used in the RNTI of ACK/NACK feedback, detection downlink control described in use Channel, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；

Processing module 93 is fed back in the downstream message for the corresponding ACK/NACK of Msg3 according to the terminal Position obtains the ACK/NACK feedback of the Msg3 of the terminal from the downstream message.

In an implementation, the processing module 93 obtains the ACK/NACK of the Msg3 of the terminal from the downstream message Before feedback, it is also used to:

In an implementation, as the first preferred implementation, the processing module 93 determines the Msg3 of the terminal Corresponding ACK/NACK feeds back the position in the downstream message, comprising:

As second of preferred implementation, the processing module 93 determines that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message, comprising:

As the third preferred implementation, the processing module 93 determines that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message, comprising:

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

Based on any of the above-described embodiment, the terminal further include:

Retransmission module, it is corresponding according to the terminal when ACK/NACK for the Msg3 in the terminal is fed back to NACK RAR grant indicated by scheduling information, transmit the Msg3 of the terminal again.

Based on the same inventive concept, a kind of base station is additionally provided in the embodiment of the present invention, is solved the problems, such as due to the base station Principle is similar to a kind of above-mentioned accidental access method of base station side shown in Fig. 8, therefore the implementation of the base station may refer to Fig. 8 institute The implementation for the method shown, overlaps will not be repeated.

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

Receiving module 101, for receiving the Msg3 of at least two terminals transmission；

Feedback information generation module 102, the corresponding ACK/NACK of Msg3 for generating at least two terminal are anti- Feedback；

Mapping block 103, for the corresponding ACK/NACK feedback of the Msg3 of at least two terminal to be mapped to downlink In message；

Determining module 104 for the RA-RNTI according to corresponding at least two terminal and is exclusively used in ACK/NACK The corresponding relationship of the RNTI of feedback determines the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI；

Sending module 105, the RNTI for being exclusively used in ACK/NACK feedback described in use add the downstream message It disturbs, and the downstream message by down control channel, after sending scrambling.

In an implementation, as the first preferred implementation, the mapping block 103 is specifically used for:

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

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

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

Based on any of the above-described embodiment, the receiving module 101 is also used to:

Below with reference to preferred hardware configuration, structure, the processing mode of terminal provided in an embodiment of the present invention are said It is bright.

As shown in figure 11, terminal provided in an embodiment of the present invention includes transceiver 111 and connect with the transceiver 111 At least one processor 112, in which:

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

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

In Figure 11, bus architecture (is represented) with bus 110, and bus 110 may include the total of any number of interconnection Line and bridge, bus 110 will include the one or more processors represented by general processor 112 and what memory 113 represented deposits The various circuits of reservoir link together.Bus 110 can also will peripheral equipment, voltage-stablizer and management circuit etc. it Various other circuits of class link together, and these are all it is known in the art, therefore, no longer carry out further to it herein Description.Bus interface 114 provides interface between bus 110 and transceiver 111.Transceiver 111 can be an element, can also To be multiple element, such as multiple receivers and transmitter, provide for being communicated over a transmission medium with various other devices Unit.Such as: transceiver 111 receives external data from other equipment.Transceiver 111 be used for by processor 112 treated number According to being sent to other equipment.Depending on the property of computing system, user interface 115, such as keypad, display can also be provided Device, loudspeaker, microphone, control stick.

Processor 112 is responsible for management bus 110 and common processing, and the general-purpose operating system is run as described in aforementioned.And it deposits Reservoir 113 can be used for the used data when executing operation of storage processor 112.

Optionally, processor 112 can be central processing unit (Central Processing Unit, CPU), specific use Way integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field Programmable Gate Array, FPGA) or Complex Programmable Logic Devices (Complex Programmable Logic Device, CPLD).

In an implementation, the ACK/NACK for the Msg3 that the processor 112 obtains the terminal from the downstream message is anti- Before feedback, following process is also executed:

In an implementation, as the first preferred implementation, the terminal is determined in the execution of processor 112 The corresponding ACK/NACK of Msg3 feeds back the position in the downstream message, comprising:

As second of preferred implementation, the execution of processor 112 determines that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message, comprising:

As the third preferred implementation, the execution of processor 112 determines that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message, comprising:

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

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

Below with reference to preferred hardware configuration, structure, the processing mode of base station provided in an embodiment of the present invention are said It is bright.

As shown in figure 12, base station provided in an embodiment of the present invention includes transceiver 121 and connect with the transceiver 121 At least one processor 122, in which:

Transceiver 121 executes following process: receiving the Msg3 of at least two terminals transmission；

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

Generate the corresponding ACK/NACK feedback of Msg3 of at least two terminal；By the Msg3 of at least two terminal Corresponding ACK/NACK feedback is mapped in downstream message；According to RA-RNTI corresponding at least two terminal with it is dedicated In the corresponding relationship of the RNTI of ACK/NACK feedback, determines that the RA-RNTI is corresponding and be exclusively used in what ACK/NACK was fed back RNTI；The downstream message is scrambled using the RNTI for being exclusively used in ACK/NACK feedback, and controls the transceiver 121 downstream message by down control channel, after sending scrambling.

In Figure 12, bus architecture (is represented) with bus 120, and bus 120 may include the total of any number of interconnection Line and bridge, the memory that bus 120 will include the one or more processors represented by processor 122 and memory 123 represents Various circuits link together.Bus 120 can also be by such as peripheral equipment, voltage-stablizer and management circuit or the like Various other circuits link together, and these are all it is known in the art, therefore, are no longer further retouched to it herein It states.Bus interface 124 provides interface between bus 120 and transceiver 121.Transceiver 121 can be an element, can also To be multiple element, such as multiple receivers and transmitter, provide for being communicated over a transmission medium with various other devices Unit.The data handled through processor 122 are transmitted on the radio medium by antenna 125, and further, antenna 125 also connects It receives data and transfers data to processor 122.

Processor 122 is responsible for management bus 120 and common processing, can also provide various functions, including timing, periphery Interface, voltage adjusting, power management and other control functions.And memory 123 can be used for storage processor 122 and hold Used data when row operation.

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

In an implementation, as the first preferred implementation, the processor 122 specifically executes following process:

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

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

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

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

Based on the same inventive concept, the embodiment of the invention also provides a kind of communication systems, as shown in figure 13, the system packet It includes:

Base station 131 for receiving the Msg3 of at least two terminals transmission, and generates the Msg3 of at least two terminal Corresponding ACK/NACK feedback；The corresponding ACK/NACK feedback of the Msg3 of at least two terminal is mapped to downstream message In；According to RA-RNTI corresponding at least two terminal be exclusively used in ACK/NACK feedback RNTI corresponding relationship, Determine the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI；It is fed back using the ACK/NACK that is exclusively used in RNTI the downstream message is scrambled, and the downstream message by down control channel, after sending scrambling；

Terminal 132 determines institute for the corresponding relationship according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback State the corresponding RNTI for being exclusively used in ACK/NACK feedback of RA-RNTI of terminal；It is exclusively used in what ACK/NACK was fed back using described RNTI detects down control channel, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；According to described The corresponding ACK/NACK of the Msg3 of terminal feeds back the position in the downstream message, from the downstream message described in acquisition The ACK/NACK of the Msg3 of terminal is fed back.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more, The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces The form of product.

The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions each in flowchart and/or the block diagram The combination of process and/or box in process and/or box and flowchart and/or the block diagram.It can provide these computers Processor of the program instruction to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices To generate a machine, so that generating use by the instruction that computer or the processor of other programmable data processing devices execute In the dress for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram It sets.

These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates, Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims

1. a kind of accidental access method, which is characterized in that this method comprises:

Terminal according to random access radio network temporary identifier RA-RNTI with to be exclusively used in positive acknowledgment ACK/ negative confirmation NACK anti- The corresponding relationship of the RNTI of feedback determines the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI of the terminal；

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

The terminal feeds back the position in the downstream message according to the corresponding ACK/NACK of the Msg3 of the terminal, from described The ACK/NACK feedback of the Msg3 of the terminal is obtained in downstream message.

2. the method as described in claim 1, which is characterized in that the terminal obtains the terminal from the downstream message Before the ACK/NACK feedback of Msg3, further includes:

3. method according to claim 2, which is characterized in that the terminal determines the corresponding ACK/ of the Msg3 of the terminal NACK feeds back the position in the downstream message, comprising:

Position of the terminal according to the random access response RAR of the terminal in RAR message, determines the terminal The corresponding ACK/NACK of Msg3 feeds back the position in the downstream message；

Wherein, sortord and the terminal pair of the corresponding ACK/NACK feedback of the Msg3 of different terminals in the downstream message Sortord of the RAR answered in RAR message is identical, and the RAR message is scrambled by the RA-RNTI.

4. method according to claim 2, which is characterized in that the terminal determines the corresponding ACK/ of the Msg3 of the terminal NACK feeds back the position in the downstream message, comprising:

The terminal determines that the Msg3 of the terminal is corresponding according to the identification information of the preamble sequence of the terminal ACK/NACK feed back position in the downstream message；

Wherein, the A bit information before each ACK/NACK feedback position in the downstream message or A ratio later Special information is the identification information for the preamble sequence that the ACK/NACK feeds back corresponding terminal, and A is natural number.

5. method according to claim 2, which is characterized in that the terminal determines the corresponding ACK/ of the Msg3 of the terminal NACK feeds back the position in the downstream message, comprising:

Terminal Physical Resource Block PRB according to used in the terminal transmission Msg3, transmission Msg3 where narrow band information, And at least one of pilot tone circular shift information used in transmission Msg3 information, determine that the Msg3 of the terminal is corresponding ACK/NACK feed back position in the downstream message.

6. the method as described in claim 1, which is characterized in that the down control channel is enhancing Physical Downlink Control Channel EPDCCH。

7. the method as described in claim 1, which is characterized in that the downstream message is to be exclusively used in transmission ACK/NACK to feed back Downlink Control Information DCI, wherein the DCI includes M-bit information, and the M-bit information is divided into N number of information field, described Each information field in N number of information field is respectively intended to one ACK/NACK feedback of carrying.

8. the method as described in claim 1, which is characterized in that the down control channel transmits in public search space.

9. the method as described in claim 1, which is characterized in that pair of RA-RNTI and the RNTI for being exclusively used in ACK/NACK feedback It should be related to predetermined for the terminal and base station, or be notified by system message to the terminal by base station.

10. method as described in any one of claims 1 to 9, which is characterized in that the terminal is obtained from the downstream message After the ACK/NACK feedback of the Msg3 of the terminal, further includes:

If the ACK/NACK of the Msg3 of the terminal is fed back to NACK, the terminal is rung according to the corresponding random access of the terminal It should permit scheduling information indicated by RAR grant, transmit the Msg3 of the terminal again.

11. a kind of accidental access method, which is characterized in that this method comprises:

Base station receives the Msg3 of at least two terminals transmission, and generates the corresponding ACK/ of Msg3 of at least two terminal NACK feedback；

Pair of base station RA-RNTI according to corresponding at least two terminal and the RNTI for being exclusively used in ACK/NACK feedback It should be related to, determine the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI；

The base station scrambles the downstream message using the RNTI for being exclusively used in ACK/NACK feedback, and passes through downlink Control channel, the downstream message after sending scrambling.

12. method as claimed in claim 11, which is characterized in that the base station is corresponding by the Msg3 of at least two terminal ACK/NACK feedback be mapped in the downstream message, comprising:

Position of the base station according to the corresponding RAR of at least two terminal in RAR message, by least two terminal Msg3 corresponding ACK/NACK feedback be mapped in downstream message；

13. method as claimed in claim 11, which is characterized in that the base station is corresponding by the Msg3 of at least two terminal ACK/NACK feedback be mapped in the downstream message, comprising:

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

14. method as claimed in claim 11, which is characterized in that the base station is corresponding by the Msg3 of at least two terminal ACK/NACK feedback be mapped in the downstream message, comprising:

Base station PRB according to used in at least two terminal transmissions Msg3, transmission Msg3 where narrow band information, with And at least one of pilot tone circular shift information used in transmission Msg3 information, by Msg3 pairs of at least two terminal The ACK/NACK feedback answered is mapped in downstream message.

15. method as claimed in claim 11, which is characterized in that the down control channel is EPDCCH.

16. method as claimed in claim 11, which is characterized in that the downstream message is to be exclusively used in transmission ACK/NACK feedback DCI, wherein the DCI includes M-bit information, and the M-bit information is divided into N number of information field, N number of information field In each information field be respectively intended to carrying one ACK/NACK feedback.

17. method as claimed in claim 11, which is characterized in that the down control channel passes in public search space It is defeated.

18. method as claimed in claim 11, which is characterized in that the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback Corresponding relationship is that terminal and base station are predetermined, or are notified by system message to terminal by base station.

19. such as the described in any item methods of claim 11~18, which is characterized in that this method further include:

20. a kind of terminal, which is characterized in that the terminal includes:

Determining module determines itself institute for the corresponding relationship according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback The corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI of the terminal of category；

Downstream message obtains module, and the RNTI fed back for being exclusively used in ACK/NACK described in use detects down control channel, with Obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；

Processing module feeds back the position in the downstream message for the corresponding ACK/NACK of Msg3 according to the terminal, The ACK/NACK feedback of the Msg3 of the terminal is obtained from the downstream message.

21. terminal as claimed in claim 20, which is characterized in that described in the processing module is obtained from the downstream message Before the ACK/NACK feedback of the Msg3 of terminal, it is also used to:

22. terminal as claimed in claim 21, which is characterized in that the processing module determines that the Msg3 of the terminal is corresponding ACK/NACK feed back position in the downstream message, comprising:

According to position of the random access response RAR of the terminal in RAR message, determine that the Msg3 of the terminal is corresponding ACK/NACK feeds back the position in the downstream message；

23. terminal as claimed in claim 21, which is characterized in that the processing module determines that the Msg3 of the terminal is corresponding ACK/NACK feed back position in the downstream message, comprising:

According to the identification information of the preamble sequence of the terminal, the corresponding ACK/ of the Msg3 of the terminal is determined NACK feeds back the position in the downstream message；

24. terminal as claimed in claim 21, which is characterized in that the processing module determines that the Msg3 of the terminal is corresponding ACK/NACK feed back position in the downstream message, comprising:

It is used according to PRB used in the terminal transmission Msg3, the narrow band information where transmission Msg3 and transmission Msg3 At least one of pilot tone circular shift information information, determine the corresponding ACK/NACK feedback of the Msg3 of the terminal in institute State the position in downstream message.

25. terminal as claimed in claim 20, which is characterized in that the down control channel is EPDCCH.

26. terminal as claimed in claim 20, which is characterized in that the downstream message is to be exclusively used in transmission ACK/NACK feedback DCI, wherein the DCI includes M-bit information, and the M-bit information is divided into N number of information field, N number of information field In each information field be respectively intended to carrying one ACK/NACK feedback.

27. terminal as claimed in claim 20, which is characterized in that the down control channel passes in public search space It is defeated.

28. terminal as claimed in claim 20, which is characterized in that the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback Corresponding relationship is that the terminal and base station are predetermined, or are notified by system message to the terminal by base station.

29. such as the described in any item terminals of claim 20~28, which is characterized in that the terminal further include:

Retransmission module, when the ACK/NACK for the Msg3 in the terminal is fed back to NACK, according to indicated by RAR grant Scheduling information transmits the Msg3 of the terminal again.

30. a kind of base station, which is characterized in that the base station includes:

Mapping block, for the corresponding ACK/NACK feedback of the Msg3 of at least two terminal to be mapped in downstream message；

Determining module for the RA-RNTI according to corresponding at least two terminal and is exclusively used in ACK/NACK feedback The corresponding relationship of RNTI determines the corresponding RNTI for being exclusively used in ACK/NACK feedback of the RA-RNTI；

Sending module, the RNTI for being exclusively used in ACK/NACK feedback described in use scrambles the downstream message, and leads to Down control channel is crossed, the downstream message after sending scrambling.

31. base station as claimed in claim 30, which is characterized in that the mapping block is specifically used for:

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

32. base station as claimed in claim 30, which is characterized in that the mapping block is specifically used for:

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

33. base station as claimed in claim 30, which is characterized in that the mapping block is specifically used for:

Narrow band information and transmission according to where PRB used in at least two terminal transmissions Msg3, transmission Msg3 At least one of pilot tone circular shift information information used in Msg3, the Msg3 of at least two terminal is corresponding ACK/NACK feedback is mapped in downstream message.

34. base station as claimed in claim 30, which is characterized in that the down control channel is EPDCCH.

35. base station as claimed in claim 30, which is characterized in that the downstream message is to be exclusively used in transmission ACK/NACK feedback DCI, wherein the DCI includes M-bit information, and the M-bit information is divided into N number of information field, N number of information field In each information field be respectively intended to carrying one ACK/NACK feedback.

36. base station as claimed in claim 30, which is characterized in that the down control channel passes in public search space It is defeated.

37. base station as claimed in claim 30, which is characterized in that the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback Corresponding relationship is that terminal and base station are predetermined, or are notified by system message to terminal by base station.

38. such as the described in any item base stations of claim 30~37, which is characterized in that the receiving module is also used to:

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

39. a kind of communication system, which is characterized in that the system includes:

Base station, for receiving the Msg3 of at least two terminals transmission, and the Msg3 for generating at least two terminal is corresponding ACK/NACK feedback；The corresponding ACK/NACK feedback of the Msg3 of at least two terminal is mapped in downstream message；According to The corresponding relationship of RA-RNTI corresponding at least two terminal and the RNTI for being exclusively used in ACK/NACK feedback, determine institute State the corresponding RNTI for being exclusively used in ACK/NACK feedback of RA-RNTI；Using the RNTI for being exclusively used in ACK/NACK feedback to institute It states downstream message to be scrambled, and the downstream message by down control channel, after sending scrambling；

Terminal determines the terminal for the corresponding relationship according to the RA-RNTI and RNTI for being exclusively used in ACK/NACK feedback The corresponding RNTI for being exclusively used in ACK/NACK feedback of RA-RNTI；Using the RNTI for being exclusively used in ACK/NACK feedback, under detection Row control channel, to obtain the downstream message for carrying the corresponding ACK/NACK feedback of Msg3；According to the Msg3 of the terminal Corresponding ACK/NACK feeds back the position in the downstream message, obtains the Msg3's of the terminal from the downstream message ACK/NACK feedback.