CN110247743A - A kind of accidental access method and device, equipment, storage medium - Google Patents

A kind of accidental access method and device, equipment, storage medium Download PDF

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Publication number
CN110247743A
CN110247743A CN201810190370.4A CN201810190370A CN110247743A CN 110247743 A CN110247743 A CN 110247743A CN 201810190370 A CN201810190370 A CN 201810190370A CN 110247743 A CN110247743 A CN 110247743A
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China
Prior art keywords
subchannel
dedicated
public
random access
subchannels
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CN201810190370.4A
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CN110247743B (en
Inventor
袁雁南
黄学艳
段然
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China Mobile Communications Group Co Ltd
China Mobile Communications Co Ltd
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China Mobile Communications Group Co Ltd
China Mobile Communications Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention discloses a kind of accidental access method and device, equipment, storage mediums, wherein the described method includes: PRACH channel is divided into m public RA subchannels and n dedicated RA subchannels；Wherein, a public RA subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for the random access of a UE；M and n is the integer more than or equal to 1；The configuration information of the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent to corresponding UE, to complete random access procedure.

Description

A kind of accidental access method and device, equipment, storage medium
Technical field
The present invention relates to collaboration multicast communication technology more particularly to a kind of accidental access method and device, equipment, storage Jie Matter.
Background technique
In CoMP, (Coordinated Multiple Points Transmission/Reception, collaboration multiple spot are passed It is defeated) in more UE (User Equipment, terminal) communication systems, it is (non-in order to reduce CoUEs (collaboration terminal) and non-CoUEs Collaboration terminal) between interfere with each other, facilitate central location to recognize CoUEs in Centralizing inspection, by PRACH (Physical Random Access Channel, Physical Random Access Channel) for two RA, (Random Access, connects frequency division multiplexing at random Enter) subchannel and protection interval between the two.Two sub-channels respectively correspond two different Preamble root sequences. The random access procedure of CoUEs and non-CoUEs carries out in different RA subchannels respectively, so as to avoid between the two Interference.
Existing PRACH subchannel partitioning technology solves only interfering with each other between CoUEs and non-CoUEs.Do not solve In certainly same RA subchannel, collision problem that different UE are generated in random access procedure competition-based.
Summary of the invention
In view of this, the embodiment of the present invention be solves the problems, such as it is existing in the prior art at least one and provide it is a kind of at random Cut-in method and device, equipment, storage medium are able to solve in same RA subchannel, and different UE connect at random competition-based The collision problem generated during entering.
The technical solution of the embodiment of the present invention is achieved in that
The embodiment of the present invention provides a kind of accidental access method, which comprises
PRACH channel is divided into m public RA subchannels and n dedicated RA subchannels；Wherein, a public RA Subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for the random access of a UE；M and n For the integer more than or equal to 1；
The configuration information of the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent to Corresponding UE, to complete random access procedure.
The embodiment of the present invention provides a kind of accidental access method, which comprises
UE receives the configuration information and the n dedicated RA subchannels for the m public RA subchannels that base station is sent Configuration information；
UE selects common Preamble sequence and dedicated Preamble sequence, according to the m public RA subchannels Configuration information and the configuration information of the n dedicated RA subchannel select a public RA subchannel and a dedicated RA letter Road；
UE sends dedicated Preamble sequence in the dedicated RA subchannel of selection, in the public RA subchannel of selection Send common Preamble sequence.
The embodiment of the present invention provides a kind of terminal, including memory, processor and storage on a memory and can handled The computer program run on device, the processor realize the accidental access method of above-mentioned terminal side when executing described program In step.
The embodiment of the present invention provides a kind of base station, including memory, processor and storage on a memory and can handled The computer program run on device, the processor are realized in the accidental access method of above-mentioned base station side when executing described program Step.
The embodiment of the present invention provides a kind of computer readable storage medium, is stored thereon with computer program, the computer The step in the accidental access method of above-mentioned base station side is realized when program is executed by processor；Alternatively, the computer program is located It manages when device executes and realizes step in the accidental access method of terminal side.
The embodiment of the present invention provides a kind of accidental access device, and described device includes:
Division unit, for PRACH channel to be divided into m public RA subchannels and n dedicated RA subchannels；Wherein, One public RA subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for a UE's Random access；
First transmission unit, for by the configuration information of the m public RA subchannel and the n dedicated RA subchannels Configuration information be sent to corresponding UE, to complete random access procedure.
The embodiment of the present invention provides a kind of accidental access device, and described device includes:
Second receiving unit, the configuration information and the n for receiving the m public RA subchannels of base station transmission are a The configuration information of dedicated RA subchannel；
Selecting unit, it is public according to described m for selecting common Preamble sequence and dedicated Preamble sequence A public RA subchannel and one are selected with the configuration information of RA subchannel and the configuration information of the n dedicated RA subchannels Dedicated RA subchannel；
Second transmission unit is being selected for sending dedicated Preamble sequence in the dedicated RA subchannel of selection Public RA subchannel on send common Preamble sequence.
In the embodiment of the present invention, PRACH channel is divided into m public RA subchannels and n dedicated RA subchannels；Its In, a public RA subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for one The random access of UE；M and n is the integer more than or equal to 1；The configuration information of a public RA subchannel of the m and the n is special It is sent to corresponding UE with the configuration information of RA subchannel, to complete random access procedure；It so, it is possible to solve same RA letter In road, collision problem that different UE are generated in random access procedure competition-based.
Detailed description of the invention
Figure 1A is the implementation process schematic diagram of accidental access method of the embodiment of the present invention；
Figure 1B is the division schematic diagram of PRACH subchannel in the embodiment of the present invention；
Fig. 2 is the implementation process schematic diagram that the end UE of the embodiment of the present invention sends MSG1；
Fig. 3 is the implementation process schematic diagram of eNB of embodiment of the present invention end TA estimation；
Fig. 4 is the implementation process schematic diagram of random access after PRACH of embodiment of the present invention subchannel divides；
Fig. 5 A is the schematic diagram of the public RA subchannel relevant peaks testing result (a) of the embodiment of the present invention；
Fig. 5 B is the schematic diagram of the public RA subchannel relevant peaks testing result (b) of the embodiment of the present invention；
Fig. 5 C is the position of each RA subchannel relevant peaks of the embodiment of the present invention and the schematic diagram of size；
Fig. 5 D is the schematic diagram that relevant peaks of the embodiment of the present invention adjudicate (UE1)；
Fig. 6 is the composed structure schematic diagram of accidental access device of the embodiment of the present invention；
Fig. 7 is a kind of hardware entities schematic diagram of random access equipment in the embodiment of the present invention.
Specific embodiment
PRACH is access channel when UE initiates calling at the beginning, can basis after UE receives FPACH response message The information of Node B instruction sends RRC Connection Request (RRC connection request) message in PRACH channel, carries out RRC establishment of connection.UE reaches multi-upstream access between LTE system and synchronous by uplink RACH.
The leader sequence Preamble sent on PRACH is to be generated by Zadoff-Chu (ZC) sequence by cyclic shift , they are originated from the root sequence of one or more Zadoff-Chu sequences, and sequence length is 839 or 139, PRACH sub-carriers Between be divided into 1.25K.There are 64 leader sequences in one cell, network side configures the leader sequence that can be used in cell, and First is broadcasted by the parameter rootSequenceIndex (root sequence index value, the value between 0 to 837) in SIB2 ZC root sequence is shifted root sequence by certain regular cyclic, generates corresponding PRACH leader sequence.
ENodeB sends RACH-ConfigCommon (RACH common configuration information) by broadcast SIB-2, tells UE The grouping of Preamble, threshold value, the power configuration of 3 size of Msg etc..It is big according to possible Msg 3 when UE initiates random access Small and pathloss (path loss) etc., selects suitable Preamble.
CoMP refers to the multiple transmission point separated on geographical location, and collaboration participates in passing for the data (PDSCH) of a terminal Defeated or joint receives the data (PUSCH) that a terminal is sent.
In the more UE communication systems of CoMP, in order to reduce interfering with each other between CoUEs and non-CoUEs, facilitate center Unit recognizes CoUEs in Centralizing inspection, by PRACH channel frequency division multiplexing between two RA subchannels and protection between the two Every.Two sub-channels respectively correspond two different Preamble root sequences.The random access procedure of CoUEs and non-CoUEs It is carried out in different RA subchannels respectively, so as to avoid interference between the two.
Existing PRACH subchannel partitioning technology solves only interfering with each other between CoUEs and non-CoUEs.Do not solve In certainly same RA subchannel, collision problem that different UE are generated in random access procedure competition-based.
The technical solution of the present invention is further elaborated with reference to the accompanying drawings and examples.
The present embodiment proposes a kind of accidental access method, is able to solve in same RA subchannel, and different UE are based on competition Random access procedure in the collision problem that generates, this method is applied to base station, and the function that this method is realized can pass through base Processor caller code in standing realizes that certain program code can be stored in computer storage medium, it is seen then that should Base station includes at least pocessor and storage media.
Figure 1A is the implementation process schematic diagram of accidental access method of the embodiment of the present invention, as shown in Figure 1A, this method comprises:
PRACH channel is divided into m public RA subchannels and n dedicated RA subchannels by step S101；Wherein, one The public RA subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for the random of a UE Access；M and n is the integer more than or equal to 1；
Wherein, more than one includes one, two, three etc., i.e., public RA subchannel can access a UE can also To access more than two UE, and dedicated RA subchannel is merely capable of one UE of access.
The configuration information of the m public RA subchannel and the n dedicated RA subchannels are matched confidence by step S102 Breath is sent to corresponding UE, to complete random access procedure.
Wherein, m=1, n are the integer more than or equal to 1, and n is more than or equal to the UE for carrying out random access in cell simultaneously Several discreet values；That is, PRACH channel is divided into a public RA subchannel and n dedicated RA subchannels by frequency division multiplexing.
Wherein, it is provided between each RA subchannel in the m public RA subchannels and the n dedicated RA subchannels Protection interval.
In other examples, the Preamble generated by different ZC root sequences is sent in each RA subchannel respectively Sequence, the length of public Preamble sequence are consistent with the length of corresponding public RA subchannel, dedicated Preamble sequence The length of column is identical as the length of corresponding dedicated RA subchannel.That is, the length of public Preamble sequence and the transmission public affairs It is consistent with the length of the public RA subchannel of Preamble sequence, the length of dedicated Preamble sequence and transmission are described specially Length with the dedicated RA subchannel of Preamble sequence is identical.Wherein, Preamble is random access preamble Abbreviation, i.e. random access lead code is used to identify UE identity when random access.
Wherein, the length of each Preamble sequence need to be less than or equal to subcarrier number shared by corresponding RA subchannel. The method is applied to random access procedure competition-based in wireless access system, alternatively, the method is applied to wirelessly connect Enter the random access procedure in user under switch instances in system；Alternatively, the method is applied in wireless access system The random access procedure of user under step loss condition of eating dishes without rice or wine.The frequency domain of public RA subchannel in random access procedure competition-based The frequency domain resource of resource and dedicated RA subchannel is static generation, and can be using dynamically or quiet under switching or step loss condition of eating dishes without rice or wine State generates the mode of public and dedicated RA subchannel frequency domain resource；In addition, in random access procedure competition-based, dedicated RA Channel UE is any selection one, and switches or eat dishes without rice or wine under step loss condition, and dedicated RA subchannel is assigned to solid by instruction message Determine UE use.
In other examples, when the method is applied to random access procedure competition-based in wireless access system When, the frequency domain resource of a public RA subchannel of m and the frequency domain resource of n dedicated RA subchannels are static generate；It is described by institute The configuration information of the configuration information and the n dedicated RA subchannels of stating m public RA subchannels is sent to corresponding UE, wraps It includes:
By broadcasting the message the m configuration informations of public RA subchannel and matching for a dedicated RA subchannel of the n Confidence ceases the UE being sent in cell.Wherein, status information is also carried in the broadcast message, the status information is for leading to Know that the mode that UE uses PRACH subchannel to divide in the cell carries out random access.The status information occupancy expands 1bit.
In other examples, when the method be applied in wireless access system under switch instances user with When machine access procedure, the frequency domain resource of a public RA subchannel of m and the frequency domain resource of n dedicated RA subchannels are either statically or dynamically It generates；The configuration information by the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent To corresponding UE, comprising: by HANDOVER COMMAND message by the configuration information of the m public RA subchannel and described The configuration information of n dedicated RA subchannels is sent to the UE in user under switch instances in cell.
In other examples, when the method is applied in wireless access system the user under step loss condition of eating dishes without rice or wine Random access procedure when, the frequency domain resource of frequency domain resource and the n dedicated RA subchannels of m public RA subchannel be it is static or Dynamic generation；The configuration information by the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels It is sent to corresponding UE, comprising: by PDCCH Order message by the configuration information and the n of the m public RA subchannel The configuration information of a dedicated RA subchannel is sent in cell in the UE to eat dishes without rice or wine under step loss condition.
In other examples, the method also includes:
Step S11 receives the dedicated Preamble sequence that at least one UE is sent in dedicated RA subchannel, public The common Preamble sequence sent in RA subchannel；
Step S12, if by detect the n dedicated RA subchannels and the m public RA subchannels determine have with When the UE of machine access interference, by the relevant peaks of the public RA subchannel of each of the UE for having random access collision UE and The relevant peaks of dedicated RA subchannel determine TA value.
In other examples, described by detecting the n dedicated RA subchannel and the m public RA subchannels Determine the UE for having random access collision, comprising:
Step S121 detects occupied first number p1 in the n dedicated RA subchannels；
Step S122 detects the second number of the Preamble sequence that index value is different in the m public RA subchannels p2；
Step S123 determines the UE of random access collision if the first number p1 is greater than the second number p2.
In other examples, the method also includes:
Step S21 receives the dedicated Preamble sequence that at least one UE is sent in dedicated RA subchannel, public The common Preamble sequence sent in RA subchannel；
Step S22, it is occupied by detecting a described n dedicated RA subchannel discovery only dedicated RA subchannel, lead to It crosses public RA subchannel or occupied dedicated RA subchannel and random access procedure is completed to corresponding UE.
In other examples, the method also includes:
Step S31 receives the dedicated Preamble sequence that at least one UE is sent in dedicated RA subchannel, public The common Preamble sequence sent in RA subchannel；
Step S32 detects occupied first number p1 in the n dedicated RA subchannels；
Step S33 detects the second number of the Preamble sequence that index value is different in the m public RA subchannels p2；
Step S34 is determined if the first number p1 is equal to the second number p2 without access interference；Pass through public RA subchannel Or occupied dedicated RA subchannel completes random access procedure to corresponding UE.
In other examples, public RA by each of the UE for having random access collision UE believes The relevant peaks of the relevant peaks in road and dedicated RA subchannel determine TA value, comprising:
Step S41, if can be connect at random to having according to the time delay of the time delay of dedicated RA subchannel and public RA subchannel The UE for entering conflict is distinguished, by the relevant peaks of the public RA subchannel of each of the UE for having random access collision UE It is overlapped with the relevant peaks of dedicated RA subchannel；
Step S42 has each in the UE of random access collision according to superposition value and the determination of corresponding decision threshold The TA value of a UE.
It is in example in others, public RA by each of the UE for having random access collision UE believes The relevant peaks of the relevant peaks in road and dedicated RA subchannel determine TA value, comprising:
If can not be to there is random access collision according to the time delay of the time delay of dedicated RA subchannel and public RA subchannel UE is distinguished, and the estimated result of the relevant peaks of relevant peaks and public RA subchannel to dedicated RA subchannel takes mean value；
The mean value is had to the TA value of every UE in the UE of random access collision as described in.
The present embodiment proposes a kind of accidental access method, is able to solve in same RA subchannel, and different UE are based on competition Random access procedure in the collision problem that generates, this method is applied to UE, and the function that this method is realized can be by UE Processor caller code realize that certain program code can be stored in computer storage medium, it is seen then that the UE is extremely It less include pocessor and storage media.
Step S51, UE receive the configuration information and the n dedicated RA for the m public RA subchannels that base station is sent The configuration information of subchannel；
Step S52, UE select common Preamble sequence and dedicated Preamble sequence, public according to the m The configuration information of the configuration information of RA subchannel and the n dedicated RA subchannels selects a public RA subchannel and one specially With RA subchannel；
Step S53, UE send dedicated Preamble sequence in the dedicated RA subchannel of selection, in the public RA of selection Common Preamble sequence is sent in subchannel.
In other examples, the UE receive the m public RA subchannels that base station is sent configuration information and The configuration information of the n dedicated RA subchannels, comprising:
When UE is in random access procedure competition-based, pass through m described in broadcast message reception public RA subchannels Configuration information and the n dedicated RA subchannel configuration information.
In other examples, the UE receive the m public RA subchannels that base station is sent configuration information and The configuration information of the n dedicated RA subchannels, comprising:
When UE is in the random access procedure under switch instances, pass through m described in HANDOVER COMMAND message sink The configuration information of configuration information and the n dedicated RA subchannel of a public RA subchannel.
In other examples, the UE receive the m public RA subchannels that base station is sent configuration information and The configuration information of the n dedicated RA subchannels, comprising:
When UE is in the random access procedure eated dishes without rice or wine under step loss condition, pass through m described in PDCCH Order message sink The configuration information of configuration information and the n dedicated RA subchannel of public RA subchannel.
In the case where more base station CoMP, intensive UE, multiple UE have certain probability that can send tool on same time-frequency location There is the Preamble of identical Index.For random access competition-based, Preamble Index is randomly choosed by UE 's.If the Index of these Preambles for being in same time-frequency location is also identical, access interference will be generated, so as to cause Additional random access time delay.
In the embodiment of the present invention, PRACH channel is divided into a public RA subchannel by frequency division multiplexing and n dedicated RA subchannel, and there are certain protection intervals between each RA subchannel；Wherein, n should be greater than be equal to in cell simultaneously into The discreet value of the UE number of row random access.Public RA subchannel is used for the random access of all UE, in addition, each UE is single respectively A solely corresponding different dedicated RA subchannel.The Preamble generated by different ZC root sequences is sent in each RA subchannel respectively The length of sequence, Preamble sequence is adjusted accordingly according to the length for marking off RA subchannel.Public Preamble sequence Length should be consistent with public RA subchannel, and the length of dedicated Preamble sequence should be with the length of dedicated RA subchannel It is identical.
In the process of implementation, the frequency bandwidth of public RA subchannel is greater than the frequency bandwidth of a dedicated RA subchannel.
As shown in Figure 1B, PRACH channel is divided into a public RA subchannel and 3 by frequency division multiplexing by n=3 Dedicated RA subchannel, and there are certain protection intervals, such as public RA subchannel and dedicated RA between each RA subchannel There are a protection intervals between channel (1), and there are a protections between dedicated RA subchannel (1) and dedicated RA subchannel (2) Interval, there are a protection intervals between dedicated RA subchannel (2) and dedicated RA subchannel (3).
It is needed to pay attention to when generating Preamble sequence some: 1) being both needed to generate one in every RA subchannel Preamble sequence；2) each Preamble sequence is still generated by ZC root sequence to guarantee its correlation；3) each Preamble sequence The length of column need to be less than or equal to subcarrier number shared by respective sub-channel.
Technical solution provided in an embodiment of the present invention at least can be used for following two usage scenario, first is that being widely used in Random access procedure competition-based in wireless access system, second is that being applied in wireless access system in switching or eating dishes without rice or wine The random access procedure of user under step loss condition.
Under above two scene, technical solution provided in an embodiment of the present invention passes through public RA subchannel and dedicated RA Channel reduces collision probability, to improve random access success rate, and then reduces random access time delay.In above two scene, The usage mode of RA subchannel can be all different.It is public when being commonly used in random access procedure competition-based in scene 1 Total RA subchannel and dedicated RA subchannel in the system initial stage by frequency division multiplexing mode, and by way of statically reserving Generation finishes, and the usage mode of RA subchannel and is notified by broadcast message small for random access procedure competition-based User (UE) in area.In addition, " being commonly used to " in scene 1 is embodied in, there is no specially towards a certain for dedicated RA subchannel A UE, user randomly choose dedicated RA subchannel.In scene 2, under for the step loss condition that switches or eat dishes without rice or wine user with When machine access procedure, the usage mode of RA subchannel is the random access mistake for user under the step loss condition that switches or eat dishes without rice or wine Journey, public RA subchannel and dedicated RA subchannel generate as needed when switching or eating dishes without rice or wine step-out, i.e., scene 2 is to be based on Event is triggered and is temporarily distributed, and wherein event triggering includes " time for the step-out that switches or eat dishes without rice or wine ".In scene 2, ENB can notify public RA subchannel and dedicated RA subchannel arrangements information, dedicated RA letter by the dedicated configuration information of user Road is specially towards switching or the step-out UE that eats dishes without rice or wine.Wherein, dedicated configuration information can be ANDOVER in a handover situation COMMAND message can be Physical Downlink Control Channel (Physical Downlink Control under step loss condition of eating dishes without rice or wine Channel, PDCCH) Order message.
For being based on competition random access procedure, when eNB completes public RA subchannel and dedicated RA subchannel generates.It is logical A kind of potential mode for knowing UE in cell is sent by SIB message.For example, eNB broadcasts SIB-2 message, removed in SIB-2 message Configuration information also includes the status information (subchannel-Config) of a 1bit, makes for notifying UE in the cell Random access is carried out with the mode that PRACH subchannel divides.The status information of the 1bit is expanded on original SIB-2 message structure Open up 1bit information.SIB-2 message structure after extension is as follows:
radioResourceConfigCommon
rach-ConfigCommon
bcch-Config
pcch-Config
prach-Config
pdsch-ConfigCommon
pusch-ConfigCommon
ul-ReferenceSignalsPUSCH
soundingRS-UL-ConfigCommon
uplinkPowerControlCommon
subchannel-Config
ue-TimersAndConstants
freqInfo
For the random access procedure of user under the step loss condition that switches or eat dishes without rice or wine, when eNB temporarily completes public RA on demand When subchannel and dedicated RA subchannel generate.A kind of switch potential mode of UE of notice is to pass through switching command (HANDOVER COMMAND) message is sent.ENB detects uplink loss, and downlink has can pass through PDCCH when data transmission The public RA subchannel of Order message informing user and dedicated RA subchannel information.
The present embodiment carries out frequency domain division to PRACH channel, and designs each Preamble sequence according to the subchannel marked off Column improve in the case where not sacrificing access delay for multi-user while access base station and are successfully accessed rate, to improve access The access capacity of channel.This method includes the division of PRACH subchannel, the design of corresponding Preamble sequence in each subchannel, The modification of SIB-2 message structure for access module switching and corresponding access procedure.The scheme that this example provides can increase Add frequency spectrum resource utilization rate, is averagely successfully accessed rate to improve, the final user experience improved in cell.
The following are the specific examples of LTE PRACH subchannel application.
Fig. 2 is the implementation process schematic diagram that the end UE of the embodiment of the present invention sends MSG1, as shown in Fig. 2, this method comprises:
Step S201, UE randomly chooses Preamble Index, and determines public Preamble sequence to be sent；
Step S202, UE randomly chooses a dedicated RA subchannel, and determines dedicated Preamble sequence to be sent；
Step S203 determines the time-frequency location for sending Preamble according to the configuration information in SIB-2, and by time-frequency location Determine corresponding RA-RNTI；
Step S204 determines target received power, sends MSG1.
From the above, it can be seen that UE selects Preamble Index first, (UE selects two from Preamble sequence group Preamble Index, the index value of respectively public Preamble sequence and the index value of dedicated Preamble sequence), and really Fixed public Preamble sequence to be sent.Then a dedicated RA subchannel is selected, and determination is sent out in this RA subchannel The dedicated Preamble sequence sent.According to the configuration information in SIB-2, UE be can choose out for sending Preamble's PRACH resource.In addition, the time-frequency location of Preamble can determine the value of RA-RNTI.After finally determining target received power, It can transmission power transmission Preamble appropriate.
Fig. 3 is the implementation process schematic diagram of eNB of embodiment of the present invention end TA estimation, as shown in figure 3, the process includes:
Step S301, receives Preamble；
Step S302 checks dedicated RA subchannel；
Step S303 judges whether more UE, if so, S304 is entered step, if not, entering step S308；
Step S304 checks public RA subchannel；
Step S305 judges whether to conflict, if so, S306 is entered step, if not, entering step S308；
Step S306, dedicated Preamble do related to local Preamble；
Step S307 calculates private subchannel deviation post, and the displacement of the result of previous step is superimposed to public subchannel；
Step S308, public Preamble do related to local Preamble；
Step S309 completes TA estimation.
From the above, it can be seen that first detecting dedicated RA subchannel after eNB receives the Preamble of UE transmission.If hair Only one existing dedicated RA subchannel is occupied, just illustrates current only one UE access eNB, then uses public RA subchannel Random process is completed, while completing TA estimation using the Preamble sequence in public RA subchannel and receiving power to estimate.Such as Fruit discovery has multiple dedicated RA subchannels occupied simultaneously, has multiple UE to access eNB in same time-frequency location with regard to explanation, then detect Public RA subchannel.If there is the different Preamble sequence of multiple Index, then public RA subchannel can be used and complete at random Access procedure, and power estimation is estimated and received by the TA that these Preamble sequences complete each UE；If public RA letter There was only a kind of Preamble sequence on road, mean that and produce access interference, needs to complete by the auxiliary of dedicated RA subchannel TA estimation and reception power estimation.
Since time delay of the same UE in different RA subchannels is identical, the public RA subchannel of UE and dedicated RA letter Offset between road is constant.Related available UE is done to dedicated Preamble to the public Preamble of UE respectively Public relevant peaks and dedicated relevant peaks.Dedicated relevant peaks are shifted, are superimposed upon it in public relevant peaks.Thus can Increase the amplitude of public relevant peaks, to be ruled out.It should be noted that time delay is relative time delay, in Fig. 5 C, " to take PRACH channel frequency length is 839 subcarriers, the public RA subchannel that length is 419, two length be 205 it is special It being illustrated for the protection interval for being 5 with RA subchannel and two length ", UE1 is 0 in the time delay of public RA subchannel, UE1 selects dedicated RA subchannel 1, then the time delay in dedicated RA subchannel 1 is also 0；UE2 is in the time delay of public RA subchannel 40, the UE2 dedicated RA subchannels 2 of selection, then the time delay in dedicated RA subchannel 2 is also 40.
Fig. 4 is the implementation process schematic diagram of random access after PRACH of embodiment of the present invention subchannel divides, as shown in figure 4, The random access procedure includes:
Step S401, eNB send SIB2 (System Information Block 2, system information block) message；Wherein, The status information of 1bit (bit) is carried in SIB2 message, the RPACH subchannel for telling UE to use divides；RPACH is also carried to match Confidence breath；
Step S402, UE send Preamble sequence, which includes: (1) UE random selection Preamble Index； (2) UE sends public Preamble and dedicated Preamble respectively；
Step S403, eNB send RAR to UE, which includes: that (1) eNB detects dedicated RA subchannel；(2) eNB is detected Public RA subchannel；(3) eNB carries out TA estimation；(4) eNB distributes TC-RNTI；(5) eNB is that MSG3 distributes ascending resource；
Step S404, UE send MSG3 to eNB, which includes: (1) UE adjustment uplink synchronous；(2) UE sends itself only One identifier；
Step S405, eNB carry out Conflict solving (Contention Resolution), which includes: (1) eNB conflict It solves；(2) TC-RNTI is converted C-RNTI by eNB；
Wherein, after dividing PRACH subchannel, by complete random access procedure competition-based, such UE obtains TA After estimated result, uplink synchronous is adjusted, and complete Conflict solving.
In this case more UE TA estimation for convenience of explanation, in case where two UE conflict.Under normal circumstances, Taking PRACH channel frequency length is 839 subcarriers, can be classified as the public RA subchannel that a length is 419, two long The protection interval that the dedicated RA subchannel and two length that degree is 205 are 5.Public RA subchannel corresponds to the ZC root that length is 419 Sequence, dedicated channel correspond to the ZC root sequence that length is 205.
When random access collision occurs for two UE, two UE use the Preamble sequence of identical Index on common channel. As shown in Figure 5A, since the time delay of two UE is different, so and can be obtained after local Preamble sequence progress related operation Two relevant peaks.Using only the information that public RA subchannel obtains, eNB is can not to judge which each relevant peaks respectively correspond UE's, so the information for needing to introduce privately owned channel is judged.If the time delay of two UE is close, the position of two relevant peaks It will be difficult to differentiate between and come, as shown in Figure 5 B, at this point it is possible to think that the TA of two UE is identical, to the estimated result of two relevant peaks Take mean value as the TA value finally estimated.
If the delay inequality of two UE away from sufficiently large, can carry out two UE using the information in dedicated channel It distinguishes.The time delay that can be seen that same UE from Fig. 5 C is identical on entire PRACH channel, so same UE's is public The offset of Preamble and dedicated Preamble on frequency domain is also identical.Belong to the phase in the different RA subchannels of same UE Relative displacement between Guan Feng is fixed and invariable.Therefore, receiving end can be by the relevant peaks in dedicated RA subchannel It is shifted, is superimposed upon it in corresponding public RA subchannel relevant peaks.As shown in Figure 5 D, two relevant peaks of UE1 are folded After adding, then taking decision threshold is 500, so that it may be ruled out the relevant peaks for belonging to UE1, to estimate the TA value of UE1.Together Sample, the TA value of UE2 can also in kind be found out.
It can be used for from the above, it can be seen that the present embodiment proposes one kind based on competition random access procedure, or switch/ It eats dishes without rice or wine the random access scheme divided based on subchannel of user's random access procedure under step loss condition.
(1) in based on competition random access procedure, subchannel is completed in the system initial stage and divides and generates, and is notified Community user.In the case where switching/eating dishes without rice or wine step loss condition in user's random access procedure, according to switch or eat dishes without rice or wine mis-synchronization event triggering i.e. When complete subchannel and divide and generate, and notify specific user.
(2) subchannel splitting scheme, which refers to, is divided into a public RA subchannel by frequency division multiplexing for random access channel With n dedicated RA subchannels, and there are certain protection intervals between each RA subchannel, and wherein n should be greater than being equal to cell The discreet value of UE number that is interior while carrying out random access.
(3) public RA subchannel is used for the random access of all UE, in addition, each UE respectively correspond one it is different special With RA subchannel.
(4) length of public Preamble sequence should be less than equal to public RA subchannel, and dedicated Preamble sequence Length should be less than the length equal to dedicated RA subchannel.
(5) it can be solved by public blob detection related to private subchannel joint using hair when single subchannel random access The problem of raw collision, and then complete the TA estimation of UE.Specific method may be respectively to the public subchannel Preamble of UE and Private subchannel Preamble does the public relevant peaks and dedicated relevant peaks of the related available UE.Dedicated relevant peaks are carried out Displacement, is superimposed upon it in public relevant peaks.The amplitude of public relevant peaks can thus be increased, to be ruled out.
(6) in based on competition random access procedure, the mode of user's subchannel arrangements information may in the notifying cell eNB It is to pass through SIBS-2.It also include the status information of a 1bit, for notifying that UE is small at this in addition to configuration information in IB-2 message Random access is carried out using the mode that PRACH subchannel divides in area.
(7) in the case where switching/eating dishes without rice or wine step loss condition in user's random access procedure, eNB notifies specific user's subchannel arrangements The mode of information may be by HANDOVER COMMAND/PDCCH Order message.
Compared with prior art, the present embodiment has the advantage that
(1) in random access procedure competition-based, existing single subchannel Random Access is compared, can reduce and touch Probability is hit, random access is improved and succeeds, reduce random access time delay.
(2) in switching/eating dishes without rice or wine the random access procedure under step loss condition, existing single subchannel random access side is compared The robustness of formula, random access is stronger, improves random access success rate.
(3) in random access procedure competition-based, existing single subchannel Random Access is compared, as multiple UE When clashing, this programme still estimates the TA value of each UE, and former scheme cannot.
(4) it can be improved compared to existing single subchannel Random Access due to using multiple subchannels to be accessed Random access user capacity and resource utilization.It should be understood that because UE needs to believe in public RA subchannel and dedicated RA Message is sent on road, single random access procedure may need more power.Because random access success rate improves, overall power becomes Change little.
Based on embodiment above-mentioned, the embodiment of the present invention provides a kind of accidental access device, which includes first device And second device, each module included by each unit and each unit included by first device can pass through the place in base station Device is managed to realize；Each module included by each unit included by second device and each unit can pass through the place in terminal Device is managed to realize；The function that certain processor is realized can also be realized by logic circuit；In the process of implementation, processor can be with For central processing unit (CPU), microprocessor (MPU), digital signal processor (DSP) or field programmable gate array (FPGA) Deng.
Fig. 6 is the composed structure schematic diagram of accidental access device of the embodiment of the present invention, as shown in fig. 6, described device includes First device 600 and second device 610, wherein the first device 600 includes division unit 601 and the first transmission unit 602, Second device 610 includes the second receiving unit 611, selecting unit 612 and the second transmission unit 613；Wherein:
Division unit 601, for PRACH channel to be divided into m public RA subchannels and n dedicated RA subchannels；Its In, a public RA subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for one The random access of UE；
First transmission unit 602, for by the configuration information of the m public RA subchannel and the n dedicated RA The configuration information of channel is sent to corresponding UE, to complete random access procedure.
Second receiving unit 611, for receiving the configuration information of the m public RA subchannels of base station transmission and described The configuration information of n dedicated RA subchannels；
Selecting unit 612, for selecting common Preamble sequence and dedicated Preamble sequence, according to the m The configuration information of the configuration information and the n of a public RA subchannel dedicated RA subchannel select a public RA subchannel and One dedicated RA subchannel；
Second transmission unit 613 is being selected for sending dedicated Preamble sequence in the dedicated RA subchannel of selection Common Preamble sequence is sent in the public RA subchannel selected.
Wherein, m=1, n are the integer more than or equal to 1, and n is more than or equal to the UE for carrying out random access in cell simultaneously Several discreet values；That is, PRACH channel is divided into a public RA subchannel and n dedicated RA subchannels by frequency division multiplexing.
Wherein, it is provided between each RA subchannel in the m public RA subchannels and the n dedicated RA subchannels Protection interval.
In other examples, the Preamble generated by different ZC root sequences is sent in each RA subchannel respectively Sequence, the length of public Preamble sequence are consistent with the length of corresponding public RA subchannel, dedicated Preamble sequence The length of column is identical as the length of corresponding dedicated RA subchannel.That is, the length of public Preamble sequence and the transmission public affairs It is consistent with the length of the public RA subchannel of Preamble sequence, the length of dedicated Preamble sequence and transmission are described specially Length with the dedicated RA subchannel of Preamble sequence is identical.
Wherein, the length of each Preamble sequence need to be less than or equal to subcarrier number shared by corresponding RA subchannel. The method is applied to random access procedure competition-based in wireless access system, alternatively, the method is applied to wirelessly connect Enter the random access procedure in user under switch instances in system；Alternatively, the method is applied in wireless access system The random access procedure of user under step loss condition of eating dishes without rice or wine.
In other examples, when the method is applied to random access procedure competition-based in wireless access system When, first transmission unit, for by broadcast message that the configuration information of a public RA subchannel of the m and the n is a The configuration information of dedicated RA subchannel is sent to the UE in cell.
Wherein, status information is also carried in the broadcast message, the status information is for notifying UE in the cell Random access is carried out using the mode that PRACH subchannel divides.
Wherein, the status information occupies the 1bit for expanding and.
In other examples, when the method be applied in wireless access system under switch instances user with When machine access procedure, first transmission unit, for being believed the m public RA by HANDOVER COMMAND message The configuration information in road and the configuration information of the n dedicated RA subchannels are sent in cell in user under switch instances UE。
In other examples, when the method is applied in wireless access system the user under step loss condition of eating dishes without rice or wine Random access procedure when, first transmission unit, for being believed public RA of the m by PDCCH Order message The configuration information in road and the configuration information of the n dedicated RA subchannels are sent to be in cell and eat dishes without rice or wine under step loss condition UE。
In other examples, the first device further include:
First receiving unit, the dedicated Preamble sequence sent in dedicated RA subchannel for receiving at least one UE Column, the common Preamble sequence sent in public RA subchannel；
Determination unit, if for being determined by detecting the n dedicated RA subchannel and the m public RA subchannels When having the UE of random access collision, by the correlation of the public RA subchannel of each of the UE for having random access collision UE The relevant peaks of peak and dedicated RA subchannel determine TA value.
In other examples, the first device further include:
First receiving unit, the dedicated Preamble sequence sent in dedicated RA subchannel for receiving at least one UE Column, the common Preamble sequence sent in public RA subchannel；
First access unit, for only having a dedicated RA subchannel by detecting described n dedicated RA subchannel discovery It is occupied, random access procedure is completed to corresponding UE by public RA subchannel or occupied dedicated RA subchannel.
In other examples, the determination unit includes:
First detection module, for detecting occupied first number p1 in the n dedicated RA subchannels；
Second detection module, for detecting index value is different in the m public RA subchannels Preamble sequence Second number p2；
First determining module determines the UE of random access collision if being greater than the second number p2 for the first number p1.
In other examples, the method also includes:
First receiving unit, the dedicated Preamble sequence sent in dedicated RA subchannel for receiving at least one UE Column, the common Preamble sequence sent in public RA subchannel；
First detection unit, for detecting occupied first number p1 in the n dedicated RA subchannels；
Second detection unit, for detecting index value is different in the m public RA subchannels Preamble sequence Second number p2；
Second access unit determines if being equal to the second number p2 for the first number p1 without access interference；Cross public RA Subchannel or occupied dedicated RA subchannel complete random access procedure to corresponding UE.
In other examples, the determination unit, comprising: laminating module, if for according to dedicated RA subchannel Time delay and the time delay of public RA subchannel can have random access punching for described to there is the UE of random access collision to distinguish The relevant peaks of the public RA subchannel of each of prominent UE UE and the relevant peaks of dedicated RA subchannel are overlapped；
Second determining module, for there is the UE of random access collision according to superposition value and the determination of corresponding decision threshold Each of UE TA value.
In other examples, the determination unit includes:
Mean module is taken, if for can not be to having according to the time delay of the time delay of dedicated RA subchannel and public RA subchannel The UE of random access collision is distinguished, the estimation knot of the relevant peaks of relevant peaks and public RA subchannel to dedicated RA subchannel Fruit takes mean value；
Third determining module, for the mean value to be had to the TA of every UE in the UE of random access collision as described in Value.
In other examples, second receiving unit, for being in random access procedure competition-based as UE When, confidence is matched by the configuration information of the public RA subchannel of m described in broadcast message reception and the n dedicated RA subchannels Breath.
In other examples, second receiving unit, for being in the random access mistake under switch instances as UE Cheng Shi passes through the configuration information and the n dedicated RA of m described in HANDOVER COMMAND message sink public RA subchannels The configuration information of subchannel.
In other examples, second receiving unit, for being in connecing under step loss condition at random of eating dishes without rice or wine as UE When entering process, pass through the configuration information and the n dedicated RA of m described in PDCCH Order message sink public RA subchannels The configuration information of subchannel.
The description of apparatus above embodiment, be with the description of above method embodiment it is similar, have same embodiment of the method Similar beneficial effect.For undisclosed technical detail in apparatus of the present invention embodiment, embodiment of the present invention method is please referred to Description and understand.
It should be noted that in the embodiment of the present invention, above-mentioned connect at random if realized in the form of software function module Enter method, and when sold or used as an independent product, also can store in a computer readable storage medium.Base In such understanding, substantially the part that contributes to existing technology can be in other words for the technical solution of the embodiment of the present invention The form of software product embodies, which is stored in a storage medium, including some instructions to So that a random access equipment executes all or part of each embodiment the method for the present invention.And storage medium above-mentioned Include: that USB flash disk, mobile hard disk, read-only memory (Read Only Memory, ROM), magnetic or disk etc. are various can store The medium of program code.It is combined in this way, the embodiment of the present invention is not limited to any specific hardware and software.
Accordingly, the embodiment of the present invention provides a kind of terminal, including memory, processor and storage are on a memory and can The computer program run on a processor, the processor realize the random access side of above-mentioned terminal side when executing described program Step in method.
Accordingly, the embodiment of the present invention provides a kind of base station, including memory, processor and storage are on a memory and can The computer program run on a processor, the processor realize the random access side of above-mentioned base station side when executing described program Step in method.
Accordingly, the embodiment of the present invention provides a kind of computer readable storage medium, is stored thereon with computer program, should The step in the accidental access method of above-mentioned base station side is realized when computer program is executed by processor；Alternatively, the computer journey Step in the accidental access method of terminal side is realized when sequence is executed by processor.
The description of medium stored above and apparatus embodiments, be with the description of above method embodiment it is similar, have same The similar beneficial effect of embodiment of the method.For undisclosed technical detail in storage medium of the present invention and apparatus embodiments, ask Referring to embodiment of the present invention method description and understand.
It should be noted that Fig. 7 is a kind of hardware entities schematic diagram of random access equipment in the embodiment of the present invention, such as scheme Shown in 7, which can be base station or terminal, and the hardware entities of the equipment include: that processor 701, communication connect Mouth 702 and memory 703, wherein
The overall operation of the usually control random access equipment 700 of processor 701.
Communication interface 702 can make random access equipment pass through network and other terminals or server communication.
Memory 703 is configured to store the instruction and application that can be performed by processor 701, can also cache device to be processed 701 and random access equipment 700 in each module is to be processed or processed data, can by flash memory (FLASH) or with Machine accesses memory (Random Access Memory, RAM) and realizes.
It should be understood that " one embodiment " or " embodiment " that specification is mentioned in the whole text mean it is related with embodiment A particular feature, structure, or characteristic is included at least one embodiment of the present invention.Therefore, occur everywhere in the whole instruction " in one embodiment " or " in one embodiment " not necessarily refer to identical embodiment.In addition, these specific features, knot Structure or characteristic can combine in any suitable manner in one or more embodiments.It should be understood that in various implementations of the invention In example, magnitude of the sequence numbers of the above procedures are not meant that the order of the execution order, the execution sequence Ying Yiqi function of each process It can determine that the implementation process of the embodiments of the invention shall not be constituted with any limitation with internal logic.The embodiments of the present invention Serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do There is also other identical elements in the process, method of element, article or device.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it Its mode is realized.Apparatus embodiments described above are merely indicative, for example, the division of the unit, only A kind of logical function partition, there may be another division manner in actual implementation, such as: multiple units or components can combine, or It is desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed each composition portion Mutual coupling or direct-coupling or communication connection is divided to can be through some interfaces, the INDIRECT COUPLING of equipment or unit Or communication connection, it can be electrical, mechanical or other forms.
Above-mentioned unit as illustrated by the separation member, which can be or may not be, to be physically separated, aobvious as unit The component shown can be or may not be physical unit；Both it can be located in one place, and may be distributed over multiple network lists In member；Some or all of units can be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in various embodiments of the present invention can be fully integrated in one processing unit, it can also To be each unit individually as a unit, can also be integrated in one unit with two or more units；It is above-mentioned Integrated unit both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through The relevant hardware of program instruction is completed, and program above-mentioned can store in computer-readable storage medium, which exists When execution, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: movable storage device, read-only deposits The various media that can store program code such as reservoir (Read Only Memory, ROM), magnetic or disk.
If alternatively, the above-mentioned integrated unit of the present invention is realized in the form of software function module and as independent product When selling or using, it also can store in a computer readable storage medium.Based on this understanding, the present invention is implemented Substantially the part that contributes to existing technology can be embodied in the form of software products the technical solution of example in other words, The computer software product is stored in a storage medium, including some instructions are used so that a random access equipment is (whole End or base station etc.) execute all or part of each embodiment the method for the present invention.And storage medium above-mentioned includes: movement Store the various media that can store program code such as equipment, ROM, magnetic or disk.
The above, only embodiments of the present invention, but scope of protection of the present invention is not limited thereto, it is any to be familiar with Those skilled in the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all cover Within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.

Claims (25)

1. a kind of accidental access method, which is characterized in that the described method includes:
Physical Random Access Channel PRACH channel is divided into m public random access RA subchannels and n dedicated RA letters Road；Wherein, a public RA subchannel is used for the random access of more than one terminal UE, a dedicated RA subchannel Random access for a UE；M and n is the integer more than or equal to 1；
The configuration information of the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent to correspondence UE, to complete random access procedure.
2. the method according to claim 1, wherein m=1, n are random more than or equal to carrying out simultaneously in cell The discreet value of the UE number of access.
3. the method according to claim 1, wherein the m public RA subchannels and the n dedicated RA Protection interval is provided between each RA subchannel in channel.
4. according to the method described in claim 3, it is characterized in that, being sent respectively in each RA subchannel by different ZC root sequences The Preamble sequence of column-generation, the length of public Preamble sequence keep one with the length of corresponding public RA subchannel It causes, the length of dedicated Preamble sequence is identical as the length of corresponding dedicated RA subchannel.
5. according to the method described in claim 3, it is characterized in that, the length of each Preamble sequence need to be less than or equal to accordingly RA subchannel shared by subcarrier number.
6. method according to any one of claims 1 to 5, which is characterized in that when the method is applied to wireless access system In system when random access procedure competition-based, the frequency domain resource of a public RA subchannel of m and the frequency domain of n dedicated RA subchannels Resource is static generates；
The configuration information by the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent to Corresponding UE, comprising:
The configuration information of the m public RA subchannel and the n dedicated RA subchannels are matched into confidence by broadcasting the message Cease the UE being sent in cell.
7. described according to the method described in claim 6, it is characterized in that, also carry status information in the broadcast message The mode that status information is used to notify UE that PRACH subchannel is used to divide in the cell carries out random access.
8. according to the method described in claim 6, it is characterized in that, the status information occupies the 1bit for expanding and.
9. method according to any one of claims 1 to 5, which is characterized in that when the method is applied to wireless access system When being in the random access procedure of user under switch instances in system, the frequency domain resource and n dedicated RA of m public RA subchannels The frequency domain resource of channel either statically or dynamically generates；
The configuration information by the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent to Corresponding UE, comprising:
It is by switching command HANDOVER COMMAND message that the configuration information of a public RA subchannel of the m and the n is a The configuration information of dedicated RA subchannel is sent to the UE in user under switch instances in cell.
10. method according to any one of claims 1 to 5, which is characterized in that when the method is applied to wireless access system In system under step loss condition of eating dishes without rice or wine when the random access procedure of user, the frequency domain resource and n of a public RA subchannel of m are a dedicated The frequency domain resource of RA subchannel either statically or dynamically generates；
The configuration information by the configuration information of a public RA subchannel of the m and the n dedicated RA subchannels is sent to Corresponding UE, comprising:
By PDCCH Order message by the configuration information of the m public RA subchannel and the n dedicated RA subchannels Configuration information is sent in cell in the UE to eat dishes without rice or wine under step loss condition.
11. method according to any one of claims 1 to 5, which is characterized in that the method also includes:
The dedicated Preamble sequence that at least one UE is sent in dedicated RA subchannel is received, is sent out in public RA subchannel The common Preamble sequence sent；
If having random access collision by detecting the n dedicated RA subchannel and the m public RA subchannel determinations When UE, by the relevant peaks and dedicated RA subchannel of the public RA subchannel of each of the UE for having random access collision UE Relevant peaks determine TA value.
12. method according to any one of claims 1 to 5, which is characterized in that the method also includes:
The dedicated Preamble sequence that at least one UE is sent in dedicated RA subchannel is received, is sent out in public RA subchannel The common Preamble sequence sent；
It is occupied by detecting a described n dedicated RA subchannel discovery only dedicated RA subchannel, pass through public RA and believes Road or occupied dedicated RA subchannel complete random access procedure to corresponding UE.
13. according to the method for claim 11, which is characterized in that it is described by detect the n dedicated RA subchannels and The m public RA subchannels determine the UE for having random access collision, comprising:
Detect occupied first number p1 in the n dedicated RA subchannels；
Detect the second number p2 of the Preamble sequence that index value is different in the m public RA subchannels；
If the first number p1 is greater than the second number p2, the UE of random access collision is determined.
14. method according to any one of claims 1 to 5, which is characterized in that the method also includes:
The dedicated Preamble sequence that at least one UE is sent in dedicated RA subchannel is received, is sent out in public RA subchannel The common Preamble sequence sent；
Detect occupied first number p1 in the n dedicated RA subchannels；
Detect the second number p2 of the Preamble sequence that index value is different in the m public RA subchannels；
If the first number p1 is equal to the second number p2, by public RA subchannel or occupied dedicated RA subchannel to right The UE answered completes random access procedure.
15. according to the method for claim 11, which is characterized in that it is described will be every in the UE for having random access collision The relevant peaks of the public RA subchannel of one UE and the relevant peaks of dedicated RA subchannel determine TA value, comprising:
If according to the time delay of the time delay of dedicated RA subchannel and public RA subchannel can to have the UE of random access collision into Row is distinguished, and the relevant peaks of the public RA subchannel of each of the UE for having random access collision UE and dedicated RA are believed The relevant peaks in road are overlapped；
There is the TA value of each of the UE of random access collision UE according to superposition value and the determination of corresponding decision threshold.
16. according to the method for claim 11, which is characterized in that it is described will be every in the UE for having random access collision The relevant peaks of the public RA subchannel of one UE and the relevant peaks of dedicated RA subchannel determine TA value, comprising:
If according to the time delay of the time delay of dedicated RA subchannel and public RA subchannel can not to have the UE of random access collision into Row is distinguished, and the estimated result of the relevant peaks of relevant peaks and public RA subchannel to dedicated RA subchannel takes mean value；
The mean value is had to the TA value of every UE in the UE of random access collision as described in.
17. a kind of accidental access method, which is characterized in that the described method includes:
UE receives the configuration information for the m public RA subchannels that base station is sent and the configuration of the n dedicated RA subchannels Information；
UE selects common Preamble sequence and dedicated Preamble sequence, according to matching for a public RA subchannel of the m Confidence breath and the configuration information of the n dedicated RA subchannels select a public RA subchannel and a dedicated RA subchannel；
UE sends dedicated Preamble sequence in the dedicated RA subchannel of selection, sends in the public RA subchannel of selection Common Preamble sequence.
18. according to the method for claim 17, which is characterized in that the method also includes:
When UE is in random access procedure competition-based, pass through matching for a public RA subchannel of m described in broadcast message reception The configuration information of confidence breath and the n dedicated RA subchannels.
19. according to the method for claim 17, which is characterized in that the method also includes:
It is public by m described in HANDOVER COMMAND message sink when UE is in the random access procedure under switch instances With the configuration information of the configuration information of RA subchannel and the n dedicated RA subchannels.
20. according to the method for claim 17, which is characterized in that the method also includes:
It is public by m described in PDCCH Order message sink when UE is in the random access procedure eated dishes without rice or wine under step loss condition The configuration information of the configuration information of RA subchannel and the n dedicated RA subchannels.
21. a kind of terminal including memory, processor and stores the computer journey that can be run on a memory and on a processor Sequence, which is characterized in that the processor realizes the step in any one of claim 17 to 20 the method when executing described program Suddenly.
22. a kind of base station including memory, processor and stores the computer journey that can be run on a memory and on a processor Sequence, which is characterized in that the processor realizes the step in any one of claim 1 to 16 the method when executing described program Suddenly.
23. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program quilt The step in any one of claim 1 to 16 the method is realized when processor executes；Alternatively, the computer program is by processor The step in claim 17 or 20 the methods is realized when execution.
24. a kind of accidental access device, which is characterized in that described device includes:
Division unit, for PRACH channel to be divided into m public RA subchannels and n dedicated RA subchannels；Wherein, one The public RA subchannel is used for the random access of more than one UE, and a dedicated RA subchannel is used for the random of a UE Access；
First transmission unit, for matching the configuration informations of the m public RA subchannel and the n dedicated RA subchannels Confidence breath is sent to corresponding UE, to complete random access procedure.
25. a kind of accidental access device, which is characterized in that described device includes:
Second receiving unit, the configuration information and the n for receiving the m public RA subchannels of base station transmission are dedicated The configuration information of RA subchannel；
Selecting unit, for selecting common Preamble sequence and dedicated Preamble sequence, according to the m public RA The configuration information of the configuration information of subchannel and the n dedicated RA subchannels select a public RA subchannel and one it is dedicated RA subchannel；
Second transmission unit, for sending dedicated Preamble sequence in the dedicated RA subchannel of selection, in the public affairs of selection With sending common Preamble sequence in RA subchannel.
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