CN108322282A - Generation method, indicating means and the device of random access leader sequence - Google Patents
Generation method, indicating means and the device of random access leader sequence Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0055—ZCZ [zero correlation zone]
- H04J13/0059—CAZAC [constant-amplitude and zero auto-correlation]
- H04J13/0062—Zadoff-Chu
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/10—Code generation
- H04J13/12—Generation of orthogonal codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W74/002—Transmission of channel access control information
- H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
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Abstract
This application discloses a kind of generation methods of random access leader sequence, including：Random access configuration information is received, the random access configuration information includes leader sequence resources pond information, and leader sequence resources pond information includes：Available basic sequence；M sequence is generated according to basic sequence, the M is more than 1；Random access leader sequence is generated according to the M sequence.Disclosed herein as well is a kind of generating means of random access leader sequence, a kind of random access configuration information indicating means and devices.Using technical solution disclosed in the present application, the operation of 5G medium-high frequency section multi-beams is can adapt to, the performance of system random access process is improved.
Description
Technical field
This application involves the generation methods and dress of wireless communication technology field more particularly to a kind of random access leader sequence
It sets, a kind of random access configuration information indicating means and device.
Background technology
With the fast development of information industry, especially from mobile Internet and Internet of Things (IoT, internet of
Things increased requirement) brings unprecedented challenge to future mobile.Such as according to International Telecommunication Union ITU
Report ITU-R M. [IMT.BEYOND 2020.TRAFFIC], it is contemplated that arrive the year two thousand twenty, mobile service amount increases opposite
(the 4G epoch) in 2010 will increase nearly 1000 times, and it also will be more than 17,000,000,000 that user equipment, which connects number, with magnanimity IoT equipment by
Mobile communications network is gradually penetrated into, connection number of devices will be more surprising.In order to cope with this unprecedented challenge, communications industry circle
Extensive 5th third-generation mobile communication technical research (5G) is expanded with academia, towards the year two thousand twenty generation.At present in the report of ITU
Accuse in the frame and overall goals that future 5G is discussed in ITU-R M. [IMT.VISION], wherein the demand to 5G look forward to,
Application scenarios and every important performance indexes elaborate.For the new demand in 5G, the report ITU-R M. of ITU
[IMT.FUTURE TECHNOLOGY TRENDS] provides the relevant information of technological trend for 5G, it is intended to which solution system gulps down
The amount of spitting is obviously improved, user experience consistency, autgmentability are to support IoT, time delay, efficiency, cost, network flexibility, new industrial
The prominent questions such as the support of business and flexible spectrum utilization.
The performance of random access directly influences the experience of user.Traditional wireless communication system, such as LTE and LTE-
In Advanced, random access procedure is applied to as established initial link, cell switching, re-establishing uplink, RRC companies
Multiple scenes such as reconstruction are connect, and random access competition-based is divided into according to the whether exclusive leader sequence resources of user
(Contention-based Random Access) and based on non-competing random access (Contention-free
Random Access).Due in random access competition-based, each user during attempting to establish uplink, from
Targeting sequencing is selected in same leader sequence resources pond, it is possible that multiple users select identical targeting sequencing to be sent to base
The case where standing, therefore, Conflicts management strategy are the important research directions in random access.How collision probability, how fast is reduced
Speed solves the conflict having occurred and that, is the key index for influencing random access performance.
Random access procedure competition-based is divided into four steps in LTE-A, as shown in Figure 1：
The first step, user randomly choose a targeting sequencing from leader sequence resources pond, are sent to base station；It docks base station
The collection of letters number carries out a correlation detection, to identify the targeting sequencing transmitted by user.
Second step, base station send random access response (Random Access Response, RAR) to user, including with
Machine access lead sequence identifier, according between user and base station time delay estimation determined by timing advance instruction, Temporary Cell without
Line Network Temporary Identifier (Cell-Radio Network Temporary Identifier, C-RNTI) and for user next time
The running time-frequency resource that uplink is distributed.
Third walks, and user sends Article 3 message (Msg3) according to the information in RAR, to base station.Include user in Msg3
The information such as terminal iidentification and RRC linking requests, wherein the user terminal identification is that user is unique, for solving conflict.
4th step, base station send Conflict solving mark to user, and the user for containing the user to win in Conflict solving is whole
End mark.If user therefrom detects the mark of oneself, interim C-RNTI is upgraded into C-RNTI, and send to base station
Ack signal completes random access procedure, and waits for the scheduling of base station；Otherwise, user start new random after being delayed at one section
Access procedure.
For that can be that user's distribution is leading since base station known users identify based on non-competing random access procedure
Sequence.Therefore when user leads sequence before sending, sequence need not be randomly choosed, and the targeting sequencing distributed can be used.Base
It stands after detecting the targeting sequencing distributed, corresponding random access response, including timing advance and ascending resource can be sent
The information such as distribution.After user receives random access response, it is believed that uplink synchronous is completed, waits for the further scheduling of base station.
Therefore, only include two steps based on non-competing random access procedure：Step 1 is that terminal sends targeting sequencing to base station；Step
Rapid two send random access response for base station to terminal.
Targeting sequencing format in existing LTE defines the sequence length of targeting sequencing and the length of corresponding cyclic prefix
Degree.For the operation of the multi-beam of 5G medium-high frequency sections, due to needing to take into account the terminal for considering that there is wave beam reciprocity and not have
There is the terminal of wave beam reciprocity, while also needing to take into account the demand of MPS process.In addition, it is contemplated that wireless communication in high-frequency band environment
In, since frequency deviation caused by phase noise is more serious, the targeting sequencing format in LTE will be unable to meet random in 5G at present
Access demand needs to develop new targeting sequencing format and targeting sequencing generating mode, to meet the access demand of 5G.
Invention content
This application provides a kind of generation method of random access leader sequence and devices and a kind of random access to configure
Information indicating method and device improve the performance of system random access process to adapt to the operation of 5G medium-high frequency section multi-beams.
This application discloses a kind of generation methods of random access leader sequence, including：
Random access configuration information is received, the random access configuration information includes leader sequence resources pond information, described
Leader sequence resources pond information includes：Available basic sequence；
M sequence is generated according to the basic sequence in the available basic sequence, the M is more than 1；
Random access leader sequence is generated according to the M sequence.
Preferably, described include according to M sequence generation random access leader sequence：
It is described that corresponding M time domain sequences are generated according to the M sequence, in each sequence of the M time domain sequences
Preceding addition cyclic prefix CP, M time domain sequences after addition CP are end to end successively, and add and protect after the last one sequence
Shield interval GT, obtains random access leader sequence.
Preferably, described include according to the corresponding M time domain sequences of M sequence generation：According to the M sequence and
The shape information of base station instruction, generates corresponding M time domain sequences.
Preferably, the M sequence of basic sequence generation according in the available basic sequence includes：With it is described can
A basic sequence in the basic sequence used is as each in the M sequence.
Preferably, leader sequence resources pond information further includes：Available set of cyclic shifts；
The basic sequence according in the available basic sequence generates M sequence：It respectively can according to
Each cyclic shift parameter in a set of cyclic shifts in set of cyclic shifts, in the available basic sequence
One basic sequence carries out corresponding cyclic shift, obtains the M sequence.
Preferably, leader sequence resources pond information further includes：Available set of cyclic shifts and available orthogonal code；
The basic sequence according in the available basic sequence generates M sequence：It respectively can according to
Each cyclic shift parameter in a set of cyclic shifts in set of cyclic shifts, in the available basic sequence
One basic sequence carries out corresponding cyclic shift, obtains the M intermediate sequence；It uses in the available orthogonal code again
One orthogonal code handles the M intermediate sequence, obtains the M sequence.
Preferably, leader sequence resources pond information further includes：Available orthogonal code；
The basic sequence according in the available basic sequence generates M sequence：Using described available
An orthogonal code in orthogonal code handles a basic sequence in the available basic sequence, obtains the M
Sequence.
Preferably, the M sequence of basic sequence generation according in the available basic sequence includes：It can by described in
Each in S basic sequence in basic sequence respectively as one basic sequence, be respectively adopted it is described can
Orthogonal code in set of cyclic shifts and/or the available orthogonal code in set of cyclic shifts carries out corresponding processing, obtains
To M_s sequence, wherein M=M_s*S, M_s >=2, S >=2.
Preferably, the M sequence of basic sequence generation according in the available basic sequence includes：To it is described can
A basic sequence in basic sequence is using a set of cyclic shifts in the available set of cyclic shifts and described
An orthogonal code in available orthogonal code carries out corresponding processing, obtains M_s sequence, and the M_s sequence is repeated S
It is secondary, obtain the M sequence, wherein M=M_s*S, M_s >=2, S >=2.
Preferably, the M sequence of basic sequence generation according in the available basic sequence includes：To it is described can
A basic sequence in basic sequence using at least one of available set of cyclic shifts set of cyclic shifts and/
Or at least one of described available orthogonal code orthogonal code carries out corresponding processing, obtains M sequence.
Preferably,
Carrying out processing to sequence using orthogonal code includes：It is multiplied by the element of orthogonal code respectively in corresponding sequence.
Preferably, being that terminal is selected from available basic sequence or base for generating the basic sequence of M sequence
It stands and is allocated to terminal from available basic sequence；
Set of cyclic shifts for carrying out cyclic shift to basic sequence is that terminal is selected from available set of cyclic shifts
Or base station be allocated to terminal from available set of cyclic shifts；
Orthogonal code for being handled sequence is that terminal is selected from available orthogonal code or base station is from available
Orthogonal code in be allocated to terminal.
Preferably, the cyclic shift parameter in the set of cyclic shifts is related to cell ID.
Preferably, the generating mode of the set of cyclic shifts is：
Wherein,The cyclic shift corresponding to m-th of sequence for i-th group of cyclic shift, parameter NcsBetween two sequences
Cyclic shift it is poor,It is shifted for permitted largest loop,For the initial cycle displacement of i-th group of cyclic shift, institute
It statesIt is related to cell ID.
Preferably, the generating mode of the initial cycle displacement of the 0th set of cyclic shifts is：
Wherein,For cell ID, function f () is to generate 0 to arriveBetween random number pseudorandom
Function, other set of cyclic shifts in addition to the 0th set of cyclic shifts according toThe cyclic shift interval between groupLine
Property generate,
The generating mode of function f () is：
Wherein, f1, f2For sum term starting point and terminal, function c () is pseudo-random generation function, and initial value is by small
Area's mark determines.
Preferably, the identifier of the random access leader sequence generated includes with lower part：Used basic sequence
Identifier and set of cyclic shifts index.
Preferably, the identifier of the random access leader sequence generated includes with lower part：Used basic sequence
The index of identifier, the index of set of cyclic shifts and orthogonal code.
Preferably, the identifier of the random access leader sequence generated includes with lower part：Used basic sequence
The index of identifier and orthogonal code.
Preferably, the identifier of the random access leader sequence generated includes with lower part：Used basic sequence
Identifier and the index of used set of cyclic shifts and/or the index of used orthogonal code.
Disclosed herein as well is a kind of generating means of random access leader sequence, including：Configuration module, sequence generate mould
Block, targeting sequencing generation module, wherein：
The configuration module, for receiving random access configuration information, the random access configuration information includes leading sequence
Row resource pool information, leader sequence resources pond information include：Available basic sequence；
The sequence generating module, for generating M sequence according to basic sequence, the M is more than 1；
The targeting sequencing generation module, for generating random access leader sequence according to the M sequence.
Disclosed herein as well is a kind of random access configuration information indicating means, including：
Random access configuration information is sent to terminal, the random access configuration information includes leader sequence resources pond letter
Breath, leader sequence resources pond information include：Available basic sequence, set of cyclic shifts and orthogonal code；
The random access leader sequence generated according to leader sequence resources pond information is received from terminal.
Preferably, the parameter in the set of cyclic shifts meets condition：Using each set of cyclic shifts to each basic sequence
After row carry out cyclic shift, basic sequence will not be obtained, the cyclic shift between different set of cyclic shifts is also not present and interferes with each other.
Disclosed herein as well is a kind of random access configuration information instruction devices, including：Sending module and receiving module,
In：
The sending module, for sending random access configuration information to terminal, the random access configuration information includes
Leader sequence resources pond information, leader sequence resources pond information include：Available basic sequence, set of cyclic shifts and orthogonal
Code；
The receiving module, before receiving the random access generated according to leader sequence resources pond information from terminal
Lead sequence.
Disclosed herein as well is a kind of generation methods of random access leader sequence, including：
Down-going synchronous is carried out, according to the energy of primary synchronization signal and subsynchronous signal in the synchronizing signal block detected, really
Fixed optimal synchronizing signal block is read in the system information that synchronizing signal block index and broadcast channel therein are carried
Random access channel configuration information；
Random access leader sequence is generated according to random access channel configuration information, in configuration or selection random access
It is sent on channel resource；Wherein：Random access channel configuration information includes leader sequence resources pond information and corresponding covering
Code code word.
Preferably, the overlay code is orthogonal covering codes.
Preferably, the overlay code is the overlay code based on sequence；
After determining optimal synchronizing signal block, further include：According to primary synchronization signal, subsynchronous signal, broadcast channel
The reference signal information being inserted at least one of system information three of middle carrying and synchronizing channel block determines that this is same
Walk the index of block or the index of corresponding downlink transmission wave beam；
It is described to include according to random access channel configuration information generation random access leader sequence：According to identified index
And preset overlay code generating mode, generate the corresponding overlay code of synchronizing channel block, and the leading sequence to being generated
Row obtain final targeting sequencing after being handled.
Preferably, described include according to random access channel configuration information generation random access leader sequence：According to terminal
Wave beam reciprocity sexuality, select corresponding overlay code to generate random access leader sequence.
As seen from the above technical solution, the application passes through the format and generating mode of improvement random access leader sequence, energy
Enough adapt to 5G medium-high frequency section multi-beams operation, can more flexible distribution targeting sequencing, and can preferably fight due to
Frequency deviation caused by phase noise, so as to improve the performance of system random access process.
In addition, a kind of generation method of random access leader sequence disclosed in the present application, by down-going synchronous from multiple same
It walks and determines optimal synchronizing signal block in block, and by reading synchronizing signal block index and broadcast channel therein institute
Random access channel configuration information in the system information of carrying generates random access leader sequence, so as to solve multi-beam
Random access problems under system improve the performance of system random access process.
Description of the drawings
Fig. 1 is tradition random access procedure schematic diagram competition-based；
Fig. 2 is the random access leader sequence form schematic diagram in the embodiment of the present application one；
Fig. 3 is targeting sequencing generating mode schematic diagram in the embodiment of the present application one；
Fig. 4 is the relation schematic diagram between cyclic shift in the embodiment of the present application one；
Fig. 5 is targeting sequencing identifier schematic diagram in the embodiment of the present application one；
Fig. 6 is the targeting sequencing structural schematic diagram employed in the embodiment of the present application two；
Fig. 7 is the generating mode schematic diagram of targeting sequencing in the embodiment of the present application two；
Fig. 8 is the targeting sequencing identifier structure in a kind of compromise realization method of the application；
Fig. 9 is the indexical relation signal between downlink broadcast channel and random access channel resource in the embodiment of the present application two
Figure；
Figure 10 is the targeting sequencing structural schematic diagram in the embodiment of the present application three；
Figure 11 is the composed structure schematic diagram of the generating means of one preferable random access leader sequence of the application；
Figure 12 is the composed structure schematic diagram of one preferable random access configuration information instruction device of the application.
Specific implementation mode
To make the object, technical solution and advantage of the application be more clearly understood, develop simultaneously embodiment referring to the drawings, right
The application is described in further detail.
The application provides a kind of generation method of random access leader sequence, and detailed process is as follows：
Terminal receives the random access configuration information of base station side transmission.The configuration information includes leader sequence resources pond letter
Breath.Wherein, leader sequence resources pond information includes at least：Available basic sequence.Preferably, can also include：It can use
Cyclic shift parameter and/or available orthogonal code etc..Wherein, preferably, cyclic shift parameter exists in the form of organizing, also may be used
Referred to as set of cyclic shifts.
According to the leader sequence resources pond information in the random access configuration information received, terminal is according to available basic
Basic sequence in sequence generates M sequence, wherein M is more than 1；Then cycle is added before each sequence of the M sequence
Prefix (CP), then M sequence after addition CP is end to end successively, and add protection interval after the last one sequence
(GT), random access leader sequence is obtained.
Wherein, terminal includes according to the mode of the basic sequence M sequence of generation in available basic sequence：
S1. according to the basic sequence and set of cyclic shifts of random selection or base station configuration, on the basis of basic sequence
M intermediate sequence is generated according to set of cyclic shifts；
S2. it on the basis of the M intermediate sequence that step S1 is generated, is given birth to according to the orthogonal code of random selection or base station configuration
At M sequence.
After obtaining M sequence, random access leader sequence is obtained according to foregoing method, before random access
It leads sequential structure and generates baseband signal.
It should be noted that since uplink may use a variety of different waveforms, such as OFDM or SC-FDMA,
Base station notifies terminal to send the shape information that targeting sequencing uses by broadcast channel, and terminal is given birth to according to step S1 and step S2
After M sequence, according to the shape information or preset shape information indicated in broadcast channel, corresponding M time domain is generated
Then sequence adds CP and GT on the basis of the M time domain sequences, finally obtains random access leader sequence.
Compared with prior art, mode provided by the present invention is capable of providing more available targeting sequencing, while can lead to
It crosses the modes such as cyclic shift randomization and mitigates inter-cell interference, provide better covering power, and can preferably support height
Multi-beam operation in multiband wireless communications environment.
Technical scheme is further elaborated below by several preferred embodiments.
Embodiment one
In the present embodiment, a kind of random access leader sequence generating mode of specific system introduction will be combined.Assuming that system work
Make in high band, to make up serious path loss in wireless communication in high-frequency band environment, base station and terminal are all made of wave beam forming
Or the mode of mixed-beam figuration, by matching the wave beam pair of transmitting-receiving two-end, to obtain beam forming gain.
In the scheme that the present embodiment is provided, random access leader sequence format is as shown in Figure 2.
As shown in Fig. 2, the random access leader sequence of the present embodiment forms (such as Fig. 2 by multiple identical or different sequences
Shown sequence 1, sequence 2 ... sequence M), cyclic prefix (Cyclic Prefix, CP) is added before each sequence, in full sequence
Later, addition protection interval (Guard Time, GT).In the present embodiment, first by taking the different situation of each sequence as an example,
The generating mode of the targeting sequencing is illustrated.
Different sequences in targeting sequencing are generated using identical basic sequence.Basic sequence is orthogonal with cyclic shift
The Zadoff-Chu sequence (ZC sequences) of characteristic.The basic sequence by terminal in the leader sequence resources pond that base station configures with etc.
Probability randomly chooses to obtain, or configures to obtain (such as exempting from the random access procedure of competition) by base station.In targeting sequencing not
It is generated by the different cyclic shift of the basic sequence with sequence.For example, being recycled to basic sequence according to set of cyclic shifts
The cyclic shift of displacement, m-th of sequence is Cm, wherein m is the serial number of cyclic shift in set of cyclic shifts, 1≤m≤M.This is followed
The generating mode of ring displacement group or cyclic shift parameter notifies terminal by base station by random access channel configuration information, or
It is to be configured by preset mode.Another configuration mode is, base station will likely set of cyclic shifts as random access
The part in the leader sequence resources pond terminal in notifying cell in a broadcast manner, terminal when there is random access demand, from
A set of cyclic shifts is randomly choosed in random access leader sequence resource pool from available set of cyclic shifts with equiprobability to use
In each sequence for combining the basic sequence selected to generate composition targeting sequencing.In addition, the terminal for working in connected state
It is used based on the random access procedure for exempting from competition, basic sequence and corresponding set of cyclic shifts configuration information, by base station
Configuration.
After generating multiple sequences, terminal selects orthogonal superposition code (Orthogonal Cover Code, OCC), and each
The corresponding element that is multiplied respectively in a sequence obtains M sequence.For example, the orthogonal superposition code selected for：W=[w (1) ..., w
(M)] m-th of sequence is after, then handlingWherein, sequenceTo be produced by basic sequence cyclic shift
M-th raw of sequence, sequence dmFor the sequence after being multiplied with orthogonal superposition code, element w (m) is m-th of orthogonal superposition code
Element.According to the difference for the sequence number for constituting targeting sequencing, selected orthogonal superposition code can be Walsh codes, be based on DFT
Orthogonal code etc..For example, the Walsh codes that length is 2 or 4 can be written as：
And
Wherein, every a line in matrix indicates an orthogonal sequence.I.e. for length be 2 Walsh codes, it is selectable just
It is 2 to hand over code number；The Walsh codes for being 4 for length, selectable orthogonal code number are up to 4.
It is specific as follows based on DFT designs orthogonal code by taking length is 3 orthogonal code as an example：
Wherein, every a line in matrix indicates that an orthogonal sequence, available orthogonal sequence number are 3.
Optional orthogonal code sequence notifies terminal by random access configuration information, and end is allocated in a manner of preset
End, terminal are selected with equiprobability from optional orthogonal code sequence；For working in the terminal of connected state, need to initiate to be based on to exempt from
When the random access procedure of competition, orthogonal code sequence is configured by base station.
The mode of above-mentioned generation targeting sequencing can be sketched with Fig. 3.
In Fig. 3, sequence, parameter selection include：The selection and generation of basic sequence, cyclic shift parameter and orthogonal sequence
Selection etc..Parameter w (m) is m-th of element in the orthogonal sequence of selected (or configuration).Sequence generates：Generate time domain
Sequence, and add CP and add the last GT of targeting sequencing.
Assuming that each sequence length of basic sequence namely targeting sequencing is Npre, terminal is selected from resource pool or base
The basic sequence configured of standing is xu, nth elements xu(n), 0≤n≤NpreThe meaning of -1, subscript u are available ZC sequences
U-th sequence.
A kind of representation of cyclic shift is：To m-th of sequence, it is by the sequence of cyclic shift：xU, m(n)=[xu
(n+Cm)]mod Npre.The case where this mode results from time domain suitable for targeting sequencing, such as the wave using SC-FDMA waveforms
Shape configures, and the cyclic shift parameter in set of cyclic shifts is defined and configured in the time domain.
The representation of another cyclic shift is：To m-th of sequence, it is by the sequence of cyclic shift：Wherein, αmWith aforementioned CmRelationship be αm=2 π Cm/Npre.This mode is suitable for leading sequence
Row the case where resulting from frequency domain, such as using the contoured configuration of OFDM waveforms, the cyclic shift parameter in set of cyclic shifts is in frequency
It defines and configures on domain.
In view of definition of the cyclic shift parameter on frequency domain or time domain has one-to-one relationship, base station only sends definition
The realization method of cyclic shift is determined according to used waveform with time domain or the set of cyclic shifts relevant parameter of frequency domain, terminal.
Orthogonal sequence is w, and m-th of element is w (m), wherein 0≤m≤M-1, wherein M are the length of orthogonal sequence,
The number of sequence i.e. in targeting sequencing.By time domain extension (namely orthogonal covering codes), treated that m-th of sequence is expressed as：
yU, m(n)=w (m) xU, m(n).Sequences yU, m(namely time-domain signal generation), which is generated, by baseband signal obtains m-th of sequence.
It should be noted that a kind of special case as the above situation, constituting multiple sequences of a targeting sequencing can make
With identical cyclic shift.At this point, different basic sequences can be characterized with different cyclic shifts, therefore the reality in corresponding Fig. 3
The step of in existing mode without cyclic shift.
Similar, as exemplary a kind of special case shown in Fig. 3, constituting multiple sequences of a targeting sequencing can use not
Same cyclic shift, meanwhile, it is extended without using orthogonal code.Correspondingly, nothing multiplies after cyclic shift in realization method shown in Fig. 3
The step of with spreading factor w (i).
To reduce inter-cell interference, the generation of cyclic shift can be related to cell ID (Cell ID).For example, it is a kind of with
The generating mode of the relevant set of cyclic shifts of cell ID can be expressed as：
Wherein,The cyclic shift corresponding to m-th of sequence for i-th group of cyclic shift.Parameter NcsBetween two sequences
Cyclic shift it is poor,It is shifted for permitted largest loop,It, should for the initial cycle displacement of i-th group of cyclic shift
Parameter is related to cell ID.A kind of possible mode is that the generating mode of the initial cycle displacement of the 0th group of cyclic shift is：
Wherein,For cell ID, function f () is to generate 0 to arriveBetween random number pseudorandom
Function.Other set of cyclic shifts can basisThe cyclic shift interval between groupLinear generating, in general,A kind of simple generating mode of function f () is：
Wherein, f1, f2For sum term starting point and terminal, function c () is pseudo-random generation function, such as using based on M
The generating mode of sequence or Gold sequence, initial value are determined by cell ID.
Conflict, while the basic sequence Jing Guo cyclic shift are not generated to meet the cyclic shift between different set of cyclic shifts
It will not become other basic sequences, the relationship between each cyclic shift in the cyclic shift of basic sequence, set of cyclic shifts is answered
Meet relationship shown in Fig. 4.
Example relationship shown in Fig. 4 indicates, after selecting basic sequence, which will not become another by cyclic shift
A basic sequence；Cyclic shift between different groups will not interfere with each other.
In the present embodiment, leader sequence resources pond information includes：Basic sequence information, available cycles displacement group information, can
With orthogonal sequence information.Above-mentioned leader sequence resources pond information passes through main letter by random access configuration information in broadcast channel
The system information block for ceasing block or Master Information Block instruction notifies terminal.For needing using random access procedure competition-based
Terminal, with equiprobability random selection basic sequence, set of cyclic shifts and orthogonal sequence in leader sequence resources pond, before
The mode of stating generates targeting sequencing.For needing using the terminal based on the random access procedure for exempting from competition, for generating leading sequence
The information of row is directly configured by base station, i.e., base station notifies configured basic sequence, cyclic shift group information and orthogonal sequence
Information.
Terminal generates targeting sequencing in the manner previously described, and sends on the random access channel resource of base station configuration leading
Sequence.For there is no wave beam reciprocity, need to attempt multiple terminals for sending beam direction, above structure can use same send wave
Beam is sent in random access channel resource, and base station configures multiple random access channel resources, and terminal is in different random access
The different transmissions for sending wave beam and carrying out random access leader sequence is used on channel resource.Another situation is different sequence
Row are sent using different transmission wave beams.
If base station detects the transmission of targeting sequencing, it will send in corresponding random access response detection window and connect at random
Enter response.Random access response includes that the Temporary Cell of targeting sequencing identifier, timing-advance information and base station distribution is wireless
The information such as Network Temporary Identifier (TC-RNTI).Wherein, in the present embodiment, targeting sequencing identifier can consist of the following parts：
Basic sequence identifier, cyclic shift group index and orthogonal code index, as shown in Figure 5.
Wherein, basic sequence identifier length is determined by basic sequence number, and cyclic shift group index length is followed by available
The number of ring displacement group determines that orthogonal code index length is determined by available orthogonal code length.Base station is according to the leading sequence detected
Row, determine targeting sequencing identifier content, and sent in random access response.
Terminal determines the targeting sequencing mark detected in random access response according to used targeting sequencing generating mode
Know whether symbol is consistent with the targeting sequencing of transmission.
Embodiment two
In the present embodiment, a kind of generation method of random access leader sequence of specific system introduction will be combined.Embodiment one
Described in scheme be constitute a targeting sequencing multiple sequences generated by identical basic sequence.In the present embodiment, one is constituted
Multiple sequences of a targeting sequencing are generated by different basic sequences.In the present embodiment, it is still assumed that system works in high band,
Multi-beam operation and mixed-beam figuration or analog beam figuration are used to obtain the wave beam forming for being enough to make up path loss
Gain.
Targeting sequencing structure employed in the present embodiment is as shown in Figure 6.
In structure shown in Fig. 6, a targeting sequencing adds CP, and in leading sequence by multiple Sequence compositions before each sequence
The last addition GT of row.Wherein, it is generated by identical basic sequence per M_s sequence, a referred to as sequence group.Specific to Fig. 6, one
For a targeting sequencing by M Sequence composition, wherein M is even number.Each two flanking sequence is generated by identical basic sequence, i.e.,：Fig. 6
In shown example, M_s 2, in practical applications, the value of M_s can be the other values more than 2.Here, M_s >=2, S >=2.
The sequence generated by identical basic sequence, generating mode is similar with previous embodiment one, i.e., according to selected
Basic sequence, or the basic sequence configured generate each sequence, and according to institute with the cyclic shift in set of cyclic shifts
The orthogonal code of selection or configuration generates each sequence for constituting targeting sequencing.The generating mode of targeting sequencing is such as in the present embodiment
Shown in Fig. 7.
In mode shown in Fig. 7, according to the configuration in leader sequence resources pond, S are chosen from leader sequence resources pond substantially
Sequence, set of cyclic shifts and orthogonal sequence generate each sequence for constituting targeting sequencing, ultimately generate by multiple sequences respectively
The targeting sequencing of composition.
In this generating mode, targeting sequencing identifier is made of S part, the structure of each part as shown in figure 5, by
Basic sequence identifier, cyclic shift group index and orthogonal sequence index composition.
In another simple generating mode, terminal is according to the configuration information in leader sequence resources pond, therefrom with equiprobability
A basic sequence, a set of cyclic shifts and an orthogonal sequence are selected, M_s sequence is generated.By this M_s sequence weight
It answers S times and adds GT at sequence end, as the targeting sequencing for random access procedure.
Mode described in this method and Fig. 7 the difference is that, the different sequence group of mode shown in Fig. 7 is by different basic
Sequence, different cyclic shifts and different orthogonal codes generate.And in above-mentioned simple generating mode, different sequence groups by
Identical basic sequence, identical cyclic shift and identical orthogonal code generate.It is aforementioned relative to generating mode shown in Fig. 7
Simple generating mode, it is advantageous that, the length of targeting sequencing identifier can greatly shorten.
In the realization method of another kind compromise, terminal selects a basic sequence in available resource pool, and selects one
A or multiple set of cyclic shifts and one or more orthogonal sequences.Its generating mode is similar with Fig. 7.It is leading in this mode
The structure of sequence identifier is as shown in figure 8, include：Basic sequence identifier, the index of cyclic shift 1, orthogonal code 1, which index ... follows
Ring shifts S indexes, orthogonal code S indexes.
Base station determines targeting sequencing identifier according to the targeting sequencing detected, and is sent in random access response.Eventually
End from leader sequence resources pond when sending targeting sequencing with the randomly selected targeting sequencing of equiprobability or base station according to being configured
Targeting sequencing, determine whether targeting sequencing identifier therein matches in the random access response detected.
Embodiment three
The present embodiment will provide a kind of downlink broadcast channel in conjunction with random access leader sequence structure provided by the present invention
Mapping relations between random access resource.In the present embodiment, system is operated using multi-beam, i.e., is realized by multiple narrow beams
Covering on a large scale.Meanwhile base station uses multiple synchronizing signal blocks, each synchronizing signal block includes primary synchronization signal, subsynchronous
Signal and broadcast channel.Each synchronizing signal block corresponds to similar and different base station side and sends wave beam.It is in the block to send wave beam
Broadcast channel notifies the corresponding random access of respective synchronization block (or broadcast channel) by the system information carried thereon
The running time-frequency resource location information of channel and corresponding random access leader sequence resource pool information.
In the present embodiment, multiple synchronizing signal broadcast channels in the block indicate identical random access channel running time-frequency resource,
Different synchronizing signal blocks sends wave beam using similar and different downlink.Fig. 9 show downlink broadcast channel in the present embodiment
Indexical relation schematic diagram between random access channel resource.
In Fig. 9, base station is in down-going synchronous using N number of downlink synchronous signal block (with 1~SS of SS block in figure
Block N are indicated).Each synchronizing signal block sends wave beam using a downlink and is sent.It is different in example shown in Fig. 9
Synchronizing signal block sends wave beam using different downlink.In practical application, different synchronizing signal blocks can also use identical
Downlink send wave beam.One or more random access channel running time-frequency resources, multiple synchronizing signal block institutes are distributed in up channel
The random access channel running time-frequency resource of instruction is identical.In example shown in Fig. 9, the random access letter indicated by two synchronizing signal blocks
Road running time-frequency resource is identical, such as：SS block1 and SS block2 indicate RACH1.The running time-frequency resource of random access channel is logical
The random access channel crossed in system information is configured.It is further to note that different random accesses channel time-frequency
The corresponding synchronizing signal block number of resource can be different.
Random access channel configuration in system information can configure random access leader sequence resource pool information.It is different with
The random access leader sequence resource pool of machine access channel running time-frequency resource can configure identical random access leader sequence.And by
In needing to distinguish different synchronizing signal block (to which the different downlink of implicit indication sends wave beam), identical random access letter is indicated
The different synchronizing signal blocks of road running time-frequency resource need to indicate mutually disjoint when indicating random access leader sequence resource pool
Random access leader sequence resource pool, for determining that base station is believed by the running time-frequency resource and synchronizing signal block for sending targeting sequencing
Breath determines that the downlink for sending random access response sends wave beam.
A kind of simple indicating mode is, when indicating leader sequence resources pond, by the way of targeting sequencing index, and instruction
The starting index and targeting sequencing quantity that targeting sequencing indexes in leader sequence resources pond, or instruction targeting sequencing originate rope
Regard it as and targeting sequencing terminates to index, for indicating the targeting sequencing index range in leader sequence resources pond.
According to targeting sequencing generating mode provided by the present invention, complete random access leader sequence is by multiple and different
Targeting sequencing forms, and multiple different targeting sequencing can pass through cyclic shift and orthogonal by one or more basic sequences
Overlay code handles to obtain, then a kind of method of salary distribution in simple leader sequence resources pond is：
Include two parts in leader sequence resources pond：Targeting sequencing (or combination of basic sequence and set of cyclic shifts) with
And orthogonal covering codes.Indicated leader sequence resources pond only includes an orthogonal covering codes in one random access channel configuration
Numeral.The corresponding targeting sequencing format of foregoing description can be indicated with Figure 10.
In Figure 10, orthogonal covering codes length used is 2, and it is real number to be expressed as w=[w1 w2], wherein w1 and w2.It connects at random
Enter targeting sequencing to be made of multiple sequences, adjacent two sequence each of which elements are multiplied by w1 and w2 respectively.It is a kind of more broadly
It is described as, orthogonal covering codes length is nocc, the multiplication can carry out before carrying out IDFT (or IFFT), or in IDFT
It is carried out after (or IFFT).Cascade forms random access leader sequence after each sequence addition CP generated.
The multiple sequences for constituting same random access leader sequence can be the different sequences in leader sequence resources pond, or
It is to be generated by multiple cyclic shifts by a sequence in leader sequence resources pond.For the former, random access leader sequence
Resource pool is made of multiple targeting sequencings and an orthogonal covering codes code word, and terminal selects multiple targeting sequencings to constitute random access
Targeting sequencing；For the latter, random access leader sequence resource pool by one or more basic sequences, multiple set of cyclic shifts with
And an orthogonal covering codes code word composition, terminal select basic sequence and set of cyclic shifts to constitute random access leader sequence.
The n handled with same orthogonal covering codesoccA continuous sequence can be in random access leader sequence resource pool
A basic sequence in randomly selected multiple sequences or random access leader sequence resource pool is formed by cyclic shift
Multiple sequences or random access leader sequence resource pool in multiple sequences etc. for being repeatedly formed of a sequence.
Aforementioned orthogonal covering codes can be orthogonal sequence, such as Walsh codes, DFT code words.When using orthogonal code, pass through
The index of the prespecified corresponding codewords of mode of look-up table, respective orthogonal code is notified in allocating random access channel configuration information
The index of code word.Table 1 show the Walsh code code book index examples that length is 2, and table 2 show the DFT code book ropes that length is 3
Draw example, table 3 show the Walsh code code book index examples that length is 4.
Table 1：The Walsh code code book indexes that length is 2
| Index | Code word |
| 0 | [+1 +1] |
| 1 | [+1 -1] |
Table 2：The DFT code book indexes that length is 3
Table 3：The Walsh code code book indexes that length is 4
| Index | Code word |
| 0 | [+1 +1 +1 +1] |
| 1 | [+1 +1 -1 -1] |
| 2 | [+1 -1 -1 +1] |
| 3 | [+1 -1 +1 -1] |
Code word in aforementioned code book is merely illustrative, it is possible to use other orthogonal code code books are as orthogonal covering codes.It removes
Outside above-mentioned example, quasi-orthogonal code word may be used in the overlay code.A kind of simple example is using M sequence or Gold sequences
Row etc. are based on polynomial pseudo-random sequence, and agreement generates the generator polynomial of pseudo-random sequence in advance, while M sequence is initial
State is related to the index of synchronizing signal block used.For example, formation sequence is w (i)=c (i+Nc), wherein NcFor pseudorandom sequence
Row interception initial position, is configured by high-level signaling.Function c (n) is pseudo-random sequence generating function, can be M sequence, or
Gold sequence.The original state of M sequence is cinit=f (Nss)；If Gold sequence, a kind of possible mode is, it is fixed wherein
The original state of one M sequence, and the original state of another M sequence is cinit=f (Nss).Wherein, NssIt is selected same
Walk the index of block, f (Nss) be and NssRelevant function.The overlay code that this kind of mode generates is expressed as：W=[w
(1) ..., w (Nocc)], multiple targeting sequencings of terminal selection or one or more basic sequences of terminal selection are by following
Multiple targeting sequencings that ring displacement generates, each element of i-th of sequence are multiplied by w (i), add CP after being transformed into time domain and cascade
Form random access leader sequence.Multiple targeting sequencings of terminal selection or the basic sequence of one or more of terminal selection
Multiple targeting sequencings that row are generated by cyclic shift, after being transformed into time domain, each element of i-th of sequence is multiplied by w (i), adds
Add CP and forms random access leader sequence after cascading.
Use orthogonal covering codes, end side behavior that can be summarized as follows according to the scheme that the present embodiment is provided：
Step 1：Down-going synchronous is carried out, random access channel configuration information is obtained.Specifically, according to receiving and detect
Synchronizing signal block in primary synchronization signal and subsynchronous signal energy, determine optimal synchronizing signal block；Read synchronization letter
Random access channel configuration information in the system information that number block index and broadcast channel therein are carried.
Step 2：Random access leader sequence is generated according to random access channel configuration information, configuration or selection
It is sent on random access channel resource.Wherein, random access channel configuration information includes leader sequence resources pond information and phase
The orthogonal covering codes code word answered.
If terminal uses the overlay code based on sequence, terminal behavior as follows：
Step 1：Down-going synchronous.According to primary synchronization signal and subsynchronous signal in the synchronizing signal block for receiving and detecting
Detection energy, determine optimal synchronizing signal block.The optimal synchronizing signal block means the maximum synchronous letter of detection energy
Number block.
Step 2：According in the system information three carried in primary synchronization signal, subsynchronous signal, broadcast channel at least
The reference signal information being inserted into one kind and synchronizing channel block determines the index of the synchronizing signal block, or corresponding downlink hair
Send the index of wave beam.
Step 3：According to identified index and preset overlay code generating mode, the synchronizing channel block is generated
Corresponding overlay code, and generated targeting sequencing is handled, final targeting sequencing is generated, and configuration or selection random
It is sent on access channel resource.
According to the scheme that the present embodiment is provided, base station side behavior can be summarized as follows：
Step 1：Base station configuration concurrency send downlink synchronous signal.
Step 2：Base station receives and detects random access leader sequence.
Step 3：Base station determines and sends at random according to random access channel running time-frequency resource information and targeting sequencing information
The downlink of access response sends wave beam.
If terminal uses the overlay code based on sequence, base station behavior that can be described as follows：
Step 1：Base station configuration concurrency send downlink synchronous signal.
Step 2：Base station receives and detects random access leader sequence.
Step 3：Base station is according to random access channel running time-frequency resource information and targeting sequencing information (targeting sequencing overlying
The information of lid code), determine that the downlink for sending random access response sends wave beam.
Meanwhile above-mentioned targeting sequencing distinguishes mode and can be used for distinguishing with wave beam reciprocity and do not have a wave beam reciprocity
The terminal of property.Specifically, there is wave beam reciprocity random access letter identical with the terminal multiplexing without wave beam reciprocity
Road running time-frequency resource.As previously mentioned, leader sequence resources pond consists of two parts：Targeting sequencing (or basic sequence is moved with cycle
The combination of hyte) and overlay code.Due to leading used in the terminal with wave beam reciprocity and without wave beam reciprocity
In sequence resources pond, targeting sequencing (or combination of basic sequence and set of cyclic shifts) part is identical, but two leading sequences
Row resource pool uses different overlay codes, such as the overlay code that different orthogonal covering codes words or different sequences generate.
After terminal reads system information, with equiprobability, from all available targeting sequencings, (or basic sequence is moved with cycle
The combination of hyte) in, one targeting sequencing of selection, the targeting sequencing distributed using base station (or basic sequence and cycle
The combination of displacement group), and according to terminal beams reciprocity sexuality, corresponding overlay code is selected, before generating final random access
Sequence is led, and is sent on corresponding random access channel running time-frequency resource.
Example IV
In the present embodiment, a kind of terminal using targeting sequencing generating mode provided by the present invention and base station will be introduced
Communication process.
In the present embodiment, synchronizing signal block is by primary synchronization signal, subsynchronous signal and broadcast channel composition.To adapt to high frequency
Multi-beam operation in section wireless communication, the distinct symbols of each synchronizing signal block are sent out by identical base station down wave beam
It send, different synchronizing signal blocks sends wave beam using identical or different base station down and sent.Synchronizing signal is in the block wide
It broadcasts in channel, sends Master Information Block, wherein Master Information Block includes to access some essential information of network, including System Frame Number,
Position (such as time index etc. of synchronizing signal block) of the synchronizing signal block in radio frames, remaining minimum system information
Scheduling information (such as the control information time-frequency of RMSI of (Remaining Minimum System Information, RMSI)
Resource allocation information etc.), system bandwidth information etc..
It include random access configuration information in RMSI.Wherein, in the random access configuration information, including random access letter
Road configuration information, leader sequence resources pond information etc..For multi-beam operating system, base station is needed according to synchronizing signal block
The correspondence of (or corresponding downlink signal) between random access channel running time-frequency resource and targeting sequencing determine base station send with
The downlink of machine access response sends wave beam.When multiple synchronizing signal blocks are mapped to identical random access channel running time-frequency resource,
The downlink signal (or synchronizing signal block) corresponding to packet notification terminal by targeting sequencing will be may require that, to determine downlink
Send wave beam.
If for different downlink sending directions, RMSI transferring contents are identical, then the random access configuration information in RMSI needs
Random access configuration information corresponding to fully synchronized block is notified to terminal.
The present embodiment will mainly introduce the advice method of random access leader sequence resource pool.In the present embodiment, connect at random
Entering configuration information includes：The corresponding random access channel configuration information of synchronizing signal block, the corresponding random access of synchronizing signal block
Leader sequence resources pond information.Mode due in the present invention, using overlay code distinguishes the random of corresponding different downlink signals
Access lead sequence resources, the advice method that may be used are：A. leader sequence resources pond is divided into sequence resources pond and covering
Code resource.The random access configuration of corresponding different downlink signals uses identical sequence resources pond, corresponding different transmission wave beams
Random access configuration uses different overlay code.B. leader sequence resources pond is divided into sequence resources pond and overlay code resource.
The random access configuration of corresponding different downlink signals uses different sequence resources pond, corresponding different the random of wave beam that send to connect
Enter configuration and uses different overlay code.C. the combination of above two mode, such as correspond to the random access of different downlink signals
Configuration uses identical or different sequence resources pond, uses identical sequence resources pond but corresponds to and send wave beam without downlink
Random access configuration uses different overlay codes.
For the advice method of overlay code resource, possible advice method is as follows：
1. only notifying available orthogonal covering codes set, indicated according to prespecified correspondence or in RMSI
Correspondence determines overlay code used in synchronizing signal block.A kind of possible mode is that the index according to synchronizing signal block is true
Fixed corresponding overlay code.One simple example is the orthogonal covering codes for using length as M, is indexed as nSSSynchronizing signal block
Corresponding overlay code indexes：
mSS=mod(nSS, M)
Wherein, mod () is modulo operation.
Another simple example is the orthogonal covering codes for using length as M, is indexed as nSSSynchronizing signal block it is corresponding
Overlay code indexes：
First way, which is equivalent to, indexes adjacent synchronizing signal block using different orthogonal covering codes, that is, assumes adjacent
Multiple synchronizing signal blocks may be mapped in identical random access running time-frequency resource.Such as M=2, the synchronizing signal that number is 16
Block, the corresponding orthogonal covering codes codewords indexes of different synchronizing signal blocks are：
[0 10101010101010 1] second way, which is equivalent to, indexes adjacent synchronizing signal block
It may be used identical orthogonal covering codes, such as M=2, the synchronizing signal block that number is 16, different synchronizing signal blocks are corresponding just
Hand over overlay code codewords indexes be：
In [0 01100110011001 1] aforesaid way, it is only necessary to notify available overlay code code word
And respective index.If the rule of correspondence is determined in a manner of prespecified, additional information notice is not needed.Except this it
Outside, corresponding rule can also be notified by RMSI.
2. notify available orthogonal covering codes set, and notify in RMSI each synchronizing signal block is corresponding orthogonal to cover
Lid code codewords indexes.The corresponding overlay code of each synchronizing signal block is arranged in RMSI according to the index of synchronizing signal block to index,
The sequence for notifying the index to constitute in RMSI.With M=2, for synchronizing signal block number is 16, the index notified in RMSI is constituted
Sequence be：
In [0 01010110101000 1] above-mentioned example, the different synchronizing signal blocks in part correspond to phase
Same random access channel running time-frequency resource needs different orthogonal covering codes to distinguish different targeting sequencings, such as synchronous letter
Number block 1,2.It is one-to-one relationship between another part synchronizing signal block and corresponding random access channel running time-frequency resource.
When available orthogonal covering codes code word is more, this required signaling overheads of mode is larger, but supports more
Add flexible correspondence.
3. aforementioned two ways is suitable for the case where RMSI all sames transmitted by different beams.For different beams institute
The different situations of RMSI of transmission, in addition to still can be in a manner of described in occupation mode 1, what different base station downlink wave beam was sent
RMSI can carry its corresponding overlay code index.
4. in being configured for the corresponding random access of different downlink wave beams, the different situation in sequence resources pond is possible
Configuration mode is that the sequence in RMSI according to synchronizing signal block index lists the corresponding random access of each synchronizing signal block
Sequence quantity in configuration in sequence resources pond, and corresponding overlay code codewords indexes.In addition, being sent out for different base station downlink
The RMSI transmitted by wave beam is sent to carry the identical situation of INFORMATION OF INCOMPLETE, as long as each downlink sends the RMSI that wave beam is sent and carries
Sequence quantity and overlay code codewords indexes in the corresponding sequence resources pond of the wave beam.
Outside based on several ways as proposed above, in some cases, different synchronizing signal blocks connects at random from different
It is corresponding to enter running time-frequency resource.At this point, the corresponding downlink in base station can be notified to send beam information by random access running time-frequency resource,
It does not need to multiple overlay codes and sends wave beam to distinguish downlink.In this case, a kind of possible mode is, in random access
Overlay code open instruction information is added in configuration information, such as variable OCC_flag is added in random access configuration information.If
The instruction information is 1, then illustrates that the targeting sequencing generating mode of overlay code mode is opened, leading using carrying out as described above
The instruction of sequence resources；If the instruction information is 0, illustrate that the targeting sequencing generating mode of overlay code mode is not turned on, this
Under kind mode, the targeting sequencing generating mode based on overlay code or certain is not used to think that overlay code is complete 1 sequence.It is another
Possible mode is, the configuration mode for still using the present embodiment to be provided, for the synchronizing signal block that is likely to occur with it is random
The case where being corresponded between access channel running time-frequency resource, it is 1 to configure available covering number of codes, and is complete 1 sequence.It is covering
Code open instruction is 0, when expression does not use the targeting sequencing generating mode of overlay code form, the instruction of overlay code correlation (such as cover
Lid code index instruction etc.) still may exist, but terminal will ignore related instruction (i.e. overlay code correlation instruction failure), still adopt
With the generation for carrying out targeting sequencing without using the targeting sequencing generating mode of overlay code.
It is to set a variety of targeting sequencing formats that whether another kind configuration, which chooses the targeting sequencing mode of overlay code form,
In some targeting sequencing formats do not use aforementioned overlay code mode targeting sequencing generating mode (or acquiescence covering code length for
1, or think that overlay code is complete 1 sequence), other targeting sequencing formats are generated using the targeting sequencing of aforementioned overlay code mode
Mode.
Terminal determines that the mode of random access leader sequence Pooled resources used is as follows：
Terminal carries out the detection of downlink synchronous signal.Terminal detects that one or more measurement results are higher than by blind examination
The synchronizing signal block of preset threshold value.Wherein measurement result includes that the reference signal of primary synchronization signal receives energy etc..
Terminal selects synchronizing signal block, and the primary system information in read broadcast channel according to predetermined criterion.Institute
It is usually to choose the maximum synchronizing signal block of measurement result to state criterion；Or with equiprobability in measurement result higher than preset
A synchronizing signal block is selected in the synchronizing signal block of threshold value.Terminal reads synchronizing signal primary system information in the block, and obtains
Synchronizing signal block indexes.
Terminal reads the random access configuration information in RMSI according to the instruction in primary system information.Random access matches confidence
Breath includes random access channel running time-frequency resource information, targeting sequencing format information, leader sequence resources pond information etc..Terminal is read
Sequence resources pond information and synchronizing signal block index corresponding overlay code index information, know leader sequence resources pond information.
According to the mode of aforementioned overlay code open instruction, then terminal needs to read the overlay code open instruction, if overlay code unlatching refers to
Show and be shown as 1, that is, open the relevant instruction of overlay code, then read sequence resources pond information and the relevant instruction of overlay code, uses
The generating mode of the targeting sequencing of overlay code.If overlay code open instruction is shown as 0, that is, it is not turned on the relevant instruction of overlay code,
Sequence resources pond information is then only read, but does not read the instruction of overlay code correlation.
Terminal generates targeting sequencing, and in corresponding random access channel according to the instruction in random access configuration information
Targeting sequencing is sent on running time-frequency resource.
The mode that random access leader sequence was detected and received in base station is similar with embodiment three, is summarized as follows：
Base station detect random access channel running time-frequency resource on information, if detecting the transmission of targeting sequencing, according to when
Frequency resource and overlay code index information determine that base station down sends wave beam；
Base station determines that terminal detects most according to the correspondence between running time-frequency resource and overlay code index and downlink signal
Excellent synchronizing signal block index, and determine that optimal downlink sends wave beam according to this, for sending random access response.
It is further to note that the method provided in the present embodiment is suitable for base station with or without wave beam reciprocity
The case where property.For not having the case where wave beam reciprocity, can be adapted to by configuring targeting sequencing format repeatedly,
Have no effect on configuration mode provided in this embodiment.
Corresponding to the above method, present invention also provides a kind of generating means of random access leader sequence, composition knots
Structure is as shown in figure 11, including：Configuration module, sequence generating module, targeting sequencing generation module, wherein：
The configuration module, for receiving random access configuration information, the random access configuration information includes leading sequence
Row resource pool information, leader sequence resources pond information include：Available basic sequence；
The sequence generating module, for generating M sequence according to basic sequence, the M is more than 1；
The targeting sequencing generation module, for generating random access leader sequence according to the M sequence.
Corresponding to the generation method of above-mentioned random access leader sequence, present invention also provides a kind of random access to match confidence
Indicating means is ceased, base station side is applied to, including：
Random access configuration information is sent to terminal, the random access configuration information includes leader sequence resources pond letter
Breath, leader sequence resources pond information include：Available basic sequence, set of cyclic shifts and orthogonal code；
The random access leader sequence generated according to leader sequence resources pond information is received from terminal.
Corresponding to the above method, present invention also provides a kind of random access configuration information instruction device, composed structures
As shown in figure 12, including：Sending module and receiving module, wherein：
The sending module, for sending random access configuration information to terminal, the random access configuration information includes
Leader sequence resources pond information, leader sequence resources pond information include：Available basic sequence, set of cyclic shifts and orthogonal
Code；
The receiving module, before receiving the random access generated according to leader sequence resources pond information from terminal
Lead sequence.
The foregoing is merely the preferred embodiments of the application, not limiting the application, all essences in the application
With within principle, any modification, equivalent substitution, improvement and etc. done should be included within the scope of the application protection god.
Claims (15)
1. a kind of generation method of random access leader sequence, which is characterized in that including：
Random access configuration information is received, the random access configuration information includes leader sequence resources pond information, described leading
Sequence resources pond information includes：Available basic sequence；
M sequence is generated according to the basic sequence in the available basic sequence, the M is more than 1；
Random access leader sequence is generated according to the M sequence.
2. according to the method described in claim 1, it is characterized in that：
It is described to include according to M sequence generation random access leader sequence：
According to the shape information that the M sequence and base station indicate, corresponding M time domain sequences are generated, in the M time domain sequence
Cyclic prefix CP is added before each sequence of row, M time domain sequences after addition CP are end to end successively, and at the last one
Protection interval GT is added after sequence, obtains random access leader sequence.
3. method according to claim 1 or 2, which is characterized in that the base according in the available basic sequence
It includes at least one below that this sequence, which generates M sequence,：
A, use a basic sequence in the available basic sequence as each in the M sequence；
B, respectively according to each cyclic shift parameter in a set of cyclic shifts in available set of cyclic shifts, to it is described can
A basic sequence in basic sequence carries out corresponding cyclic shift, obtains the M sequence；Wherein, described leading
Sequence resources pond information further includes：Available set of cyclic shifts；The identifier of the random access leader sequence generated include with
Lower part：The identifier of used basic sequence and the index of set of cyclic shifts；
C, respectively according to each cyclic shift parameter in a set of cyclic shifts in available set of cyclic shifts, to it is described can
A basic sequence in basic sequence carries out corresponding cyclic shift, obtains the M intermediate sequence；Again using available
Orthogonal code in an orthogonal code M intermediate sequence is handled, obtain the M sequence；Wherein, described leading
Sequence resources pond information further includes：Available set of cyclic shifts and available orthogonal code；The random access leader sequence generated
Identifier include with lower part：Used basic sequence identifier, the index of set of cyclic shifts and the index of orthogonal code；
D, the M sequence of basic sequence generation according in the available basic sequence includes：Using available orthogonal code
In an orthogonal code basic sequence in the available basic sequence is handled, obtain the M sequence；Its
In, leader sequence resources pond information further includes：Available orthogonal code；The identifier of the random access leader sequence generated
Including with lower part：The index of used basic sequence identifier and orthogonal code.
4. according to the method described in claim 3, it is characterized in that, the basic sequence according in the available basic sequence
M sequence of column-generation includes at least one below：
Using each in S basic sequence in the available basic sequence as one basic sequence, divide
Set of cyclic shifts and/or the orthogonal code in the available orthogonal code that Cai Yong be in the available set of cyclic shifts carry out pair
The processing answered obtains M_s sequence, wherein M=M_s*S, M_s >=2, S >=2；Wherein, the random access guiding sequence generated
The identifier of row includes with lower part：The identifier of used basic sequence and the index of used set of cyclic shifts and/
Or the index of used orthogonal code.
To a basic sequence in the available basic sequence using a cycle in the available set of cyclic shifts
An orthogonal code in displacement group and the available orthogonal code carries out corresponding processing, M_s sequence is obtained, by the M_s
A sequence repeats S times, obtains the M sequence, wherein M=M_s*S, M_s >=2, S >=2；
To a basic sequence in the available basic sequence using at least one of described available set of cyclic shifts
At least one of set of cyclic shifts and/or the available orthogonal code orthogonal code carry out corresponding processing, obtain M sequence；
Wherein, the identifier of the random access leader sequence generated includes with lower part：The identifier of used basic sequence and
The index of the index of used set of cyclic shifts and/or used orthogonal code.
5. method according to claim 3 or 4, it is characterised in that：
Carrying out processing to sequence using orthogonal code includes：It is multiplied by the element of orthogonal code respectively in corresponding sequence.
6. method according to any one of claims 1 to 5, it is characterised in that：
Basic sequence for generating M sequence is that terminal is selected from available basic sequence or base station is from available base
Terminal is allocated in this sequence；
For to basic sequence carry out cyclic shift set of cyclic shifts be it is that terminal is selected from available set of cyclic shifts or
Person base station is allocated to terminal from available set of cyclic shifts；
Orthogonal code for being handled sequence be that terminal is selected from available orthogonal code or base station from it is available just
It hands in code and is allocated to terminal.
7. according to claim 3 to 5 any one of them method, it is characterised in that：
Cyclic shift parameter in the set of cyclic shifts is related to cell ID；
The generating mode of the set of cyclic shifts is：
Wherein,The cyclic shift corresponding to m-th of sequence for i-th group of cyclic shift, parameter NcsFollowing between two sequences
Ring displacement is poor,It is shifted for permitted largest loop,It is described for the initial cycle displacement of i-th group of cyclic shift
It is related to cell ID；
Wherein, the generating mode of the initial cycle displacement of the 0th set of cyclic shifts is：
Wherein,For cell ID, function f () is to generate 0 to arriveBetween random number pseudo-random function,
Other set of cyclic shifts in addition to the 0th set of cyclic shifts according toThe cyclic shift interval between groupIt is linear raw
At,
The generating mode of function f () is：
Wherein, f1, f2For sum term starting point and terminal, function c () is pseudo-random generation function, and initial value is by cell mark
Know and determines.
8. a kind of generating means of random access leader sequence, which is characterized in that including：It is configuration module, sequence generating module, preceding
Sequence generating module is led, wherein：
The configuration module, for receiving random access configuration information, the random access configuration information includes targeting sequencing money
Source pond information, leader sequence resources pond information include：Available basic sequence；
The sequence generating module, for generating M sequence according to basic sequence, the M is more than 1；
The targeting sequencing generation module, for generating random access leader sequence according to the M sequence.
9. a kind of random access configuration information indicating means, which is characterized in that including：
Random access configuration information is sent to terminal, the random access configuration information includes leader sequence resources pond information, institute
Stating leader sequence resources pond information includes：Available basic sequence, set of cyclic shifts and orthogonal code；
The random access leader sequence generated according to leader sequence resources pond information is received from terminal.
10. according to the method described in claim 9, it is characterized in that：
Parameter in the set of cyclic shifts meets condition：Cycle shifting is carried out to each basic sequence using each set of cyclic shifts
Behind position, basic sequence will not be obtained, the cyclic shift between different set of cyclic shifts is also not present and interferes with each other.
11. a kind of random access configuration information instruction device, which is characterized in that including：Sending module and receiving module, wherein：
The sending module, for sending random access configuration information to terminal, the random access configuration information includes leading
Sequence resources pond information, leader sequence resources pond information include：Available basic sequence, set of cyclic shifts and orthogonal code；
The receiving module, for receiving the random access guiding sequence generated according to leader sequence resources pond information from terminal
Row.
12. a kind of generation method of random access leader sequence, which is characterized in that including：
Down-going synchronous is carried out, according to the energy of primary synchronization signal and subsynchronous signal in the synchronizing signal block detected, is determined most
Excellent synchronizing signal block is read random in the system information that synchronizing signal block index and broadcast channel therein are carried
Access channel configuration information；
Random access leader sequence is generated according to random access channel configuration information, in configuration or selection random access channel
It is sent in resource；Wherein：Random access channel configuration information includes leader sequence resources pond information and corresponding overlay code code
Word.
13. according to the method for claim 12, it is characterised in that：
The overlay code is orthogonal covering codes.
14. according to the method for claim 12, it is characterised in that：
The overlay code is the overlay code based on sequence；
After determining optimal synchronizing signal block, further include：It is held according in primary synchronization signal, subsynchronous signal, broadcast channel
The reference signal information being inserted at least one of system information three of load and synchronizing channel block determines that the synchronization is believed
The index of number block or corresponding downlink send the index of wave beam；
It is described to include according to random access channel configuration information generation random access leader sequence：According to it is identified index and
Preset overlay code generating mode, generates the corresponding overlay code of synchronizing channel block, and the targeting sequencing to being generated into
Final targeting sequencing is obtained after row processing.
15. according to claim 12 to 14 any one of them method, it is characterised in that：
It is described to include according to random access channel configuration information generation random access leader sequence：According to the wave beam reciprocity of terminal
Ability selects corresponding overlay code to generate random access leader sequence.
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| US16/478,460 US11284440B2 (en) | 2017-01-16 | 2018-01-16 | Method and apparatus for performing random access |
| KR1020180005642A KR102514774B1 (en) | 2017-01-16 | 2018-01-16 | Method and apparatus for performing random access |
| PCT/KR2018/000749 WO2018131985A1 (en) | 2017-01-16 | 2018-01-16 | Method and apparatus for performing random access |
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|---|---|
| KR102514774B1 (en) | 2023-03-28 |
| KR20180084669A (en) | 2018-07-25 |
| CN108322282B (en) | 2021-11-12 |
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