CN110062472A - Frequency offset parameter determination method, user equipment and computer-readable medium - Google Patents
Frequency offset parameter determination method, user equipment and computer-readable medium Download PDFInfo
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- CN110062472A CN110062472A CN201810057947.4A CN201810057947A CN110062472A CN 110062472 A CN110062472 A CN 110062472A CN 201810057947 A CN201810057947 A CN 201810057947A CN 110062472 A CN110062472 A CN 110062472A
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- random access
- access channel
- leader sequence
- frequency offset
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/002—Transmission of channel access control information
- H04W74/008—Transmission of channel access control information with additional processing of random access related information at receiving side
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
Embodiment of the disclosure discloses a kind of method for determining frequency offset parameter of the leader sequence in random access channel, comprising: obtains the random access channel subcarrier spacing Δ f from base stationRA, preamble sequence length LRAWith up channel subcarrier spacing Δ f；And according to acquired random access channel subcarrier spacing Δ fRA, preamble sequence length LRAWith up channel subcarrier spacing Δ f, frequency offset parameter of the leader sequence in random access channel is determinedEmbodiment of the disclosure also discloses corresponding UE and corresponding computer-readable medium.
Description
Technical field
This application involves wireless communication technology fields, more particularly to one kind is for determining leader sequence in random access channel
In frequency offset parameter method and corresponding user equipment and computer-readable medium.
Background technique
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's (English
Literary full name: International Telecommunication Union, english abbreviation: 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, user equipment (UE) connection number also will be more than 17,000,000,000, as the IoT equipment of magnanimity gradually penetrates into movement
Communication network, connection number of devices will be more surprising.In order to cope with this unprecedented challenge, communications industry circle and academia are
Extensive 5th third-generation mobile communication technical research (5G) is expanded, towards the year two thousand twenty generation.At present in the report ITU-R M. of ITU
In [IMT.VISION] discuss future 5G frame and overall goals, wherein the demand to 5G is looked forward to, application scenarios and
Every important performance indexes elaborate.For the new demand in 5G, the report ITU-R M. [IMT.FUTURE of ITU
TECHNOLOGY TRENDS] provide the relevant information of technological trend for 5G, it is intended to it solves throughput of system and significantly mentions
Liter, user experience consistency, scalability with support IoT, time delay, efficiency, cost, network flexibility, emerging service support and
The prominent questions such as flexible spectrum utilization.
Random access (full name in English: Random Access) process is the important means of UE access.UE is same by downlink
It after walking signal completion down-going synchronous, needs to carry out random access procedure, to complete the registration in cell, obtains uplink timing advance
Uplink synchronous is completed in instruction.Random access competition-based is divided into according to the whether exclusive leader sequence resources of UE
(Contention-based Random Access) and based on non-competing random access (Contention-free
Random Access).Since in random access competition-based, each UE is during attempting to establish uplink, from phase
Leader sequence is selected in same leader sequence resources, it is possible that multiple UE select identical leader sequence to be sent to base station,
Therefore Conflicts management strategy is the important research direction in random access, how to reduce collision probability, how quickly to solve
The conflict of generation 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.Start it in random access procedure
Before, the configuration information of random access procedure is sent to UE by base station, and UE carries out random access mistake according to the configuration information received
Journey.
In step 1, UE randomly chooses a leader sequence from leader sequence resources pond, is sent to base station, base station pair
It receives signal and carries out correlation detection, to identify leader sequence transmitted by UE；
In step 2, base station sends random access response (full name in English: Random Access Response, English to UE
Text abbreviation: RAR), identified timing advance is estimated comprising random access leader sequence identifier, according to time delay between UE and base station
Instruction, Temporary Cell Radio Network temporary identifier (full name in English: Temporary Cell-Radio Network Temporary
Identifier, english abbreviation: TC-RNTI), and by the UE running time-frequency resource that next time, uplink distributed；
In step 3, UE sends message three (english abbreviation: MSg3) to base station, wraps in MSg3 according to the information in RAR
Containing for information such as UEUE mark and RRC linking requests, wherein UEUE mark is UE unique, for solving conflict
Mark；
In step 4, base station sends Conflict solving mark to UE, contains the UEUE mark won in Conflict solving, UE
After the mark for detecting oneself, Temporary Cell Radio Network temporary identifier is upgraded into Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (English
Literary full name: Cell-Radio Network Temporary Identifier, english abbreviation: C-RNTI), and sent to base station
Confirm character (full name in English: Acknowledgement, english abbreviation: ACK) signal, completes random access procedure, and wait base
The scheduling stood, otherwise, UE will start new random access procedure after one section of delay.
For based on non-competing random access procedure, UE is identified as known to base station, leader sequence can be distributed for UE,
Therefore when UE leads sequence before sending, random selection sequence is not needed, and will use the leader sequence distributed.It is detecting base station
To after the leader sequence distributed, corresponding random access response, including the letter such as timing advance and ascending resource distribution can be sent
Breath.After UE receives random access response, it is believed that uplink synchronous is completed, waits the further scheduling of base station.Therefore, it initially connects
Enter and only include two steps based on non-competing random access procedure: step 1 is sends leader sequence；Step 2 is random
Access the transmission of response.
Either based on competition or non-competing random access, first step for initiating random access is random
Leader sequence is sent on access channel.In LTE, it is as follows that baseband signal generates formula:
In above formula, βPRACHFor the amplitude Dynamic gene calculated by power control process, NZCFor sequence length, xU, v(n) it is
Leader sequence, K are the factor for adjusting random access channel and up channel subcarrier spacing gap, Δ fRAFor random access
The subcarrier spacing of channel, k0For the parameter for adjusting location of frequency domain of random access channel, TCPFor circulating prefix-length.ParameterFor the frequency domain position for adjusting random access leader sequence, the bandwidth for being allowed to the Uplink Shared Channel apart from both ends is identical
(namely the protection interval at leader sequence both ends is identical), specific value is as shown in table 1.
Table 1: parameterValue
It can be seen that the parameter and random access channel subcarrier spacing are directly related.
For 5G system, between the subcarrier that the subcarrier spacing and random access channel that system is supported are supported
Every more various.Specifically, the subcarrier spacing that uplink is supported includes 15/30/60/120kHz, and random access channel
Subcarrier spacing include 1.25/5/15/30/60/120kHz.A variety of up channels and random access channel subcarrier spacing
Combination causes the adjustment for leader sequence position more complicated.
In existing 5G technology, the subcarrier spacing that the subcarrier spacing and random access channel that uplink is supported are supported is more
Add diversification, single or a few parameter for being used to adjust leader sequence frequency domain position will be unable to meet all possible sub- loads
Wave spacing combination.
Summary of the invention
The disclosure is intended to the technical issues of solving and is, in the prior art for adjusting leader sequence in frequency domain position
The scheme of parameter is unable to satisfy in 5G between a variety of possible Uplink Shared Channel subcarrier spacings and random access channel subcarrier
Every.In order to solve this problem, the present disclosure proposes a kind of for determining frequency offset of the leader sequence in random access channel
The scheme of parameter can be suitable for the combination of each subcarrier spacings.
According to the one side of the disclosure, it provides a kind of for determining that frequency domain of the leader sequence in random access channel is inclined
The method of shifting parameter, comprising: obtain the random access channel subcarrier spacing Δ f from base stationRA, preamble sequence length LRAWith
Up channel subcarrier spacing Δ f；And according to acquired random access channel subcarrier spacing Δ fRA, preamble sequence length
LRAWith up channel subcarrier spacing Δ f, frequency offset parameter of the leader sequence in random access channel is determined
According to another aspect of the present disclosure, a kind of UE is provided, comprising:
Processor；And
Memory is stored with computer executable instructions, described instruction when being executed by processor, execute processor with
Lower operation: the random access channel subcarrier spacing Δ f from base station is obtainedRA, preamble sequence length LRAIt is carried with up channel
Wave spacing Δ f；And according to acquired random access channel subcarrier spacing Δ fRA, preamble sequence length LRABelieve with uplink
Channel sub-carrier interval delta f determines frequency offset parameter of the leader sequence in random access channel
In one exemplary embodiment, frequency offset parameter of the leader sequence in random access channel is determinedFurther
It include: to calculate frequency offset parameter of the leader sequence in random access channel according to the following formula
Wherein, NuIndicate the number for being used as the subcarrier of guard band in random access channel, symbol [] indicates to be rounded
Operation.
In one exemplary embodiment, frequency offset parameter of the leader sequence in random access channel is determinedFurther
It include: to calculate frequency offset parameter of the leader sequence in random access channel according to the following formula
Wherein, NuIndicate the number for being used as the subcarrier of guard band in random access channel, symbol [] indicates to be rounded
Operation.
In one exemplary embodiment, frequency offset parameter of the leader sequence in random access channel is determinedFurther
It include: to calculate frequency offset parameter of the leader sequence in random access channel according to the following formula
Wherein, NuIndicate the number for being used as the subcarrier of guard band in random access channel, symbol [] indicates to be rounded
Operation.
In one exemplary embodiment,WhereinFor every uplink
The random access channel Physical Resource Block number of channel sub-carrier interval delta fSymbolFor upper rounding
It operates, wherein NSCFor the subcarrier number of a Physical Resource Block.
In one exemplary embodiment, N is obtained according to following mapping tableu:
In one exemplary embodiment, frequency offset parameter of the leader sequence in random access channel is determinedFurther
It include: that frequency offset parameter of the leader sequence in random access channel is determined according to one of following mapping table
According to another ten thousand face of this liter, a kind of computer-readable medium is provided, is stored with instruction, the finger on it
It enables when executed by the processor, the processor is made to execute foregoing method.
Detailed description of the invention
Fig. 1 schematically shows traditional random access procedure schematic diagram competition-based；
Fig. 2 schematically shows be used to determine leader sequence what the side UE executed according to disclosure exemplary embodiment
The flow chart of the method for frequency offset parameter in random access channel；
Fig. 3 schematically shows random access channel guard band schematic diagram；
Fig. 4 schematically shows another random access channel guard band schematic diagrames；
Fig. 5 schematically shows the structural schematic diagram of the UE according to disclosure exemplary embodiment.
Fig. 6 is the baseband signal generating mode based on DFT；
Fig. 7 is improved leader sequence baseband signal generating mode；
Fig. 8 is another mode for generating baseband signal.
Specific embodiment
Embodiment of the disclosure is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the disclosure, and cannot be construed to the limitation to the disclosure.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in the specification of the disclosure
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.It is used herein to arrange
Diction "and/or" includes one or more associated wholes for listing item or any cell and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term), there is meaning identical with the general understanding of those of ordinary skill in disclosure fields.Should also
Understand, those terms such as defined in the general dictionary, it should be understood that have in the context of the prior art
The consistent meaning of meaning, and unless idealization or meaning too formal otherwise will not be used by specific definitions as here
To explain.
Those skilled in the art of the present technique are appreciated that " UE " used herein above, " terminal " both include reception of wireless signals
The equipment of device only has the equipment of the wireless signal receiver of non-emissive ability, and the equipment including receiving and emitting hardware,
It has the reception that on bidirectional communication link, can carry out two-way communication and emits the equipment of hardware.This equipment can wrap
It includes: honeycomb or other communication equipments, with single line display or multi-line display or without the bee of multi-line display
Nest or other communication equipments；PCS (PerSonal CommunicationS Service, PCS Personal Communications System), can combine
Voice, data processing, fax and/or communication ability；(PerSonal Digital ASSiStant, individual digital help PDA
Reason), may include radio frequency receiver, pager, the Internet/intranet access, web browser, notepad, calendar and/or
GPS (Global PoSitioning SyStem, global positioning system) receiver；Conventional laptop and/or palmtop computer
Or other equipment, have and/or the conventional laptop including radio frequency receiver and/or palmtop computer or other equipment.
" UE " used herein above, " terminal " can be it is portable, can transport, be mounted on the vehicles (aviation, sea-freight and/or land)
In, or be suitable for and/or be configured in local runtime, and/or with distribution form, operate in a times in the earth and/or space
What other positions operation." UE " used herein above, " terminal " can also be that communication terminal, access terminals, music/video play
Terminal, such as can be PDA, MID (Mobile Internet Device, mobile internet device) and/or there is music/view
The mobile phone of frequency playing function is also possible to the equipment such as smart television, set-top box.In addition, " UE ", " terminal " can also be with " use
Family ", " user equipment " replacement.
A variety of possibility in 5G are unable to satisfy in the parameter of frequency domain position for adjusting leader sequence in the prior art
Uplink Shared Channel subcarrier spacing and random access channel subcarrier spacing, embodiment of the disclosure propose one kind at UE
The method for generating baseband signal executed, comprising the following steps:
The random access configuration information from base station is read, including random access channel configuration information and leader sequence are matched
Confidence breath etc.；
Random access channel subcarrier spacing is obtained from random access channel configuration information, and is configured from leader sequence
Preamble sequence length information is obtained in information；And the other systems information transmitted by the base station (such as least residue system letter
Breath, Remaining Minimum System Information, RMSI) in obtain up channel subcarrier spacing；
It is long according to acquired random access channel subcarrier spacing, up channel subcarrier spacing and leader sequence
Degree, determines frequency offset parameter of the leader sequence in random access channel；And
Baseband signal is generated according to frequency offset parameter of the identified leader sequence in random access channel.
Specifically, according to formula (1), baseband signal is generated:
K=Δ f/ Δ fRA (1)
Wherein, parameter LRAFor preamble sequence length, k0For the parameter for adjusting random access channel position, Δ f is upper line number
It is believed that the up channel subcarrier spacing in road or initial access, Δ fRAFor random access channel subcarrier spacing,It is preceding
Lead the circulating prefix-length of sequence, TcFor the sampling interval,For the ginseng for adjusting leader sequence position in random access channel
Number, i.e., the frequency offset parameter of leader sequence herein in random access channel.
Thus, the disclosure focuses on frequency offset parameter of the leader sequence in random access channelDetermination.
Hereinafter with reference to Fig. 2, to according to disclosure exemplary embodiment executed at UE for determining leader sequence
The flow chart of the method for frequency offset parameter in random access channel is specifically described.
Fig. 2 schematically shows according to disclosure exemplary embodiment executed at UE for determining leader sequence
The flow chart of the method 200 of frequency offset parameter in random access channel.As shown in Fig. 2, method 200 may include step
201 and step 202.
In step 201, the available random access channel subcarrier spacing Δ f from base station of UERA, leader sequence it is long
Spend LRAWith up channel subcarrier spacing Δ f.
In step 202, UE can be according to acquired random access channel subcarrier spacing Δ fRA, preamble sequence length
LRAWith up channel subcarrier spacing Δ f, frequency offset parameter of the leader sequence in random access channel is determined
Frequency offset parameter of the leader sequence in random access channelIt can be obtained by calculation or can pass through
Search predefined random access channel subcarrier spacing Δ fRA, preamble sequence length LRAWith up channel subcarrier spacing Δ f
With frequency offset parameter of the leader sequence in random access channelMapping table obtain.
Herein, unless otherwise indicated, " up channel " all refers to uplink data channels, such as Physical Uplink Shared Channel
(PUSCH)。
Frequency offset parameter of the leader sequence in random access channel is being obtained by calculationEmbodiment in, can be with
The random access channel subcarrier spacing Δ f according to acquired in from base stationRA, preamble sequence length LRAWith up channel subcarrier
Interval delta f calculates frequency offset parameter of the leader sequence in random access channelThe disclosure this embodiment offers with
Lower several embodiments.
Embodiment one
In this embodiment, frequency offset parameter of the leader sequence in random access channel is being calculatedValue when,
It is necessary to ensure that the protection bandwidth between the subcarrier of the nearest transmission data of leader sequence both ends distance is consistent.
As shown in figure 3, passing through parameter Kk0Setting, the son of the first subcarrier of random access channel and up channel carries
Between wave is overlapping, therefore the first subcarrier distance of random access channel is closed between the last one subcarrier of up channel
Away from the subcarrier spacing for a up channel.
It can be seen that removing needs when the first subcarrier distance for calculating leader sequence closes on the guard band of up channel
It calculates outside the guard band inside random access channel, it is also necessary to calculate the subcarrier width of a up channel.And it is counting
When the last one subcarrier distance of calculation leader sequence closes on the guard band of up channel, then more calculating one is needed to connect at random
Enter the subcarrier spacing of channel.
Specifically, it is assumed that pass through up channel subcarrier spacing and random access channel subcarrier spacing Δ fRAAnd it is preceding
Lead sequence length LRACalculating, the number for being used as the subcarrier of guard band in random access channel can be obtained, be denoted as Nu, then
In the bandwidth-distance for the up channel subcarrier that the subcarrier distance for calculating leader sequence both ends is closed on, the bandwidth BWgFor (Nu+
1)ΔfRA+ Δ f, wherein Nu+ 1 considers the subcarrier and random access channel for being used as guard band in random access channel
Subcarrier spacing between the last one subcarrier and neighbouring up channel, the subcarrier spacing are the subcarrier of random access channel
Interval；Δ f is up channel subcarrier spacing, when the calculating first subcarrier distance of leader sequence closes on up channel subcarrier
For calculating guard band bandwidth.AndIndicate that the first subcarrier distance of first leader sequence closes on last height of up channel
The number of random access channel subcarrier in the guard band of carrier wave.The parameter can calculate as follows:
The bandwidth for calculating data subcarrier of the random access leader sequence apart from both ends first is as follows:
BWg=(Nu+1)ΔfRA+Δf
The bandwidth of side protection band can be obtained later:
BWh=BWg/2
According to the subcarrier width of up channel, the subcarrier in aforementioned front side in random access channel can be obtained
Number are as follows:
Wherein, symbol [] indicates floor operation, which can be used rounding or lower rounding symbol replaces.
To sum up, parameterIt can be calculated by following formula:
Wherein, symbol [] indicates floor operation, which can be used rounding or lower rounding symbol replaces.
Embodiment two
In this embodiment, when calculating the subcarrier spacing in random access channel, random access channel is not calculated
Spacing between the last one interior subcarrier and neighbouring up channel, i.e., calculate the last one subcarrier of leader sequence with adjacent to upper
When guard band between row channel sub-carrier, the subcarrier number in random access channel is only calculated.At this point, parameterIt calculates such as
Under.
The bandwidth for calculating data subcarrier of the random access leader sequence apart from both ends first is as follows:
BWg=NuΔfRA+Δf
The bandwidth of side protection band can be obtained later:
BWh=BWg/2
According to the subcarrier width of up channel, the subcarrier in aforementioned front side in random access channel can be obtained
Number are as follows:
Wherein, symbol [] indicates floor operation.Rounding can be used in the floor operation or lower rounding symbol replaces.
To sum up, parameterIt can be calculated by following formula:
Wherein, symbol [] indicates floor operation.Rounding can be used in the floor operation or lower rounding symbol replaces.
Embodiment three
In this embodiment, only consider the subcarrier number in random access channel, make it in random access preamble sequence
The subcarrier number for arranging two sides is approximately equal, as shown in Figure 4.
At this point, the subcarrier number for guard band before the first subcarrier of leader sequenceIt can calculate as follows:
Wherein, symbol [] indicates floor operation.Rounding can be used in the floor operation or lower rounding symbol replaces.
Although the disclosure provide only three above embodiment as calculate leader sequence in random access channel
Frequency offset parameterIllustrative embodiments, but the disclosure is not limited to this, other are used for according to random access channel
Carrier wave interval delta fRA, preamble sequence length LRALeader sequence is calculated with up channel subcarrier spacing Δ f to believe in random access
Frequency offset parameter in roadAny suitable method also fall within the scope of the present disclosure.
In above-mentioned calculation process, NuFor the subcarrier number for being used for guard band in random access channel, can lead to
It crosses and searches predefined random access channel subcarrier spacing Δ fRA, preamble sequence length LRAWith up channel subcarrier spacing
Δ f and NuMapping table (table 2 below) obtain, or according to random access channel subcarrier spacing Δ fRA, leading sequence
Column length LRAIt is calculated with up channel subcarrier spacing Δ f.
Table 2: protection subcarrier number
N is being obtained by calculationuEmbodiment in, calculate the random access channel of every up channel subcarrier spacing first
Physical Resource Block number:
Wherein, NscFor the subcarrier number of a Physical Resource Block, value can be fixed as 12；For every up channel
The random access channel Physical Resource Block number at carrier wave interval；SymbolFor upper floor operation.
The subcarrier number calculated in random access channel for guard band later is as follows:
By searching for predefined random access channel subcarrier spacing Δ fRA, preamble sequence length LRABelieve with uplink
The frequency offset parameter of channel sub-carrier interval delta f and leader sequence in random access channelMapping table obtain it is leading
Frequency offset parameter of the sequence in random access channelEmbodiment in, the disclosure gives following several possible correspondences
Relation table.
A kind of possible mapping table is as shown in table 3.
Table 3: parameterA kind of possible value
Alternatively possible mapping table is as shown in table 4.
Table 4: parameterAlternatively possible value
The third possible mapping table is as shown in table 5.
Table 5: parameterAnother possible value
In the example shown in above-mentioned table 3,4,5, the known predefined mapping table of UE and base station passes through
The random access channel subcarrier spacing Δ f obtained from base stationRA, preamble sequence length LRAAnd the uplink letter in system information
Channel sub-carrier interval delta f can know corresponding parameter from the mapping table
Alternatively, table 5 can be simplified according to leader sequence format or preamble sequence length, specific as follows:
If sequence length LRAIt is 139, thenValue is 3；
If sequence length LRAIt is 839, and up channel subcarrier spacing is not 60kH, thenValue is 13；
If sequence length LRAIt is 839, and up channel subcarrier spacing is 60kH, thenValue is 157.
Further, since random access channel subcarrier spacing and sequence length are directly determined by leader sequence format
, frequency domain position offset can be determined according to leader sequence format and up channel subcarrier spacing
Still by taking table 5 as an example:
For leader sequence format 0,1,2, if up channel subcarrier spacing is not 60kHz, frequency offset measurement value
It is 13；If up channel subcarrier spacing is 60kHz, value 157；
For leader sequence format 3, then frequency offset measurement value is 13；
For leader sequence format A0, A1, A2, A3, B1, B2, B3, C0, C2, A1/B1, frequency offset measurement value is 3.On
Stating description can also be determined in a manner of tabling look-up.
For the mapping table (such as table 3 and table 4) of other modes, corresponding relationship can also be carried out in a similar way
The optimization of table.The first two columns index in table 3,4,5 is merged, as leader sequence format.For example, it may be possible to mode such as
Shown in table 6,7,8.
Table 6: parameterMay determine mode
Table 7: parameterAnother method of determination
Table 8: parameterAnother value mode
Hereinafter with reference to Fig. 5, the structure of UE according to an exemplary embodiment of the present invention is described.Fig. 5 is schematically
Show the structural block diagram of UE 500 according to an exemplary embodiment of the present invention.UE 500 can be used for executing to be described with reference to Fig. 2
Method 200.For simplicity, only the schematic structure of the UE according to disclosure exemplary embodiment is described herein, and
The details being described in detail in method 200 described in reference to Fig. 2 is omitted as preceding.
As shown in figure 5, UE 500 include processing unit or processor 501, the processor 501 can be individual unit or
The combination of the multiple units of person, for executing the different step of method；Memory 502, wherein computer executable instructions are stored with,
Described instruction makes processor 501 execute following operation when being executed by processor 501: obtaining the random access letter from base station
Channel sub-carrier interval delta fRA, preamble sequence length LRAWith up channel subcarrier spacing Δ f；And according to acquired random
Access channel sub-carrier interval delta fRA, preamble sequence length LRAWith up channel subcarrier spacing Δ f, determine that leader sequence exists
Frequency offset parameter in random access channel
As previously mentioned, frequency offset parameter of the leader sequence in random access channelIt can be for example, by above-mentioned three kinds
Embodiment is calculated or can be by searching for predefined random access channel subcarrier spacing Δ fRA, leader sequence
Length LRAWith the frequency offset parameter of up channel subcarrier spacing Δ f and leader sequence in random access channelCorrespondence
Relation table (for example, one of table above-mentioned 3~8) obtains, and specifically may refer to the associated description of the method 200 for Fig. 2.
A kind of generating mode of random access leader sequence baseband signal explained below.As in the foregoing embodiment, with
Machine is accessed baseband signal and is generated using following formula.
K=Δ f/ Δ fRA
Wherein,For the frequency domain sequence that leader sequence generates, generated using following formula.
βPRACHFor the amplitude Dynamic gene that power control obtains, for so that the signal sent meets the pact of power control
Beam.yU, v(k) frequency-region signal that frequency domain acquisition is transformed to for leader sequence, is obtained using following formula.
Wherein, xU, vIt (m) is time domain preamble sequence.
It can be seen that, to generate baseband signal, needed from foregoing description by following steps: (discrete Fourier becomes DFT
Change), it is used for from timing leader sequence xU, v(m) frequency domain sequence y is generatedU, v(n)；Subcarrier maps, for being believed according to random access
The frequency domain position of position selection leader sequence of the frequency domain position and leader sequence in road in random access channel；IDFT (from
Dissipate inverse fourier transform), for generating final time domain baseband signals.Above-mentioned steps can be indicated with Fig. 6.
For some leader sequence formats, need to be repeated in time domain.Replicated blocks in Fig. 6 are duplicate for generating
Leader sequence symbol.
In view of in practical implementations, DFT and IDFT generally use FFT (Fast Fourier Transform) and IFFT (quick Fu
Vertical leaf inverse transformation) it realizes, the power that FFT points are 2.According to above-mentioned generating mode, due to random access channel and uplink
The mismatch of data channel subcarrier spacing, it will lead to some problems when realizing.
Specifically, the case where being greater than random access subcarrier spacing for up channel subcarrier spacing believes in frequency domain
Used IFFT will need biggish IFFT point number when number being converted into time-domain signal.One simply example is random access letter
It is divided into 1.25kHz between channel sub-carrier, the case where up channel is 15kHz, to meet the sampling interval specified in agreement, needs to adopt
It is for using interval in LTE in time, it is also desirable to using 24576 points of IFFT with 49152 point IFFT.
And the case where random access subcarrier spacing is less than for up channel subcarrier spacing, directly use up channel
Subcarrier spacing will cause some wastes again.
A kind of possible improved method is, using the points of the IFFT determined according to random access leader sequence length,
The sampling interval of time-domain sampling determines according to the points of IFFT and the subcarrier spacing of random access channel.In addition cyclic prefix
Sample rate is adjusted afterwards.
The flow chart of this improved method is as shown in Figure 7.
In Fig. 7, the points of IDFT are selected according to sequence length.For example, the leader sequence for being 839 for length, selection
1024 points of IDFT；The leader sequence for being 139 for length selects 512 points of IDFT.
The sampling interval of time domain selects according to IDFT points and random access channel sub-carrier frequencies, specific choice such as following table
It is shown:
Table 9: the selection of time-domain sampling frequency
The circulating prefix-length of subsequent addition also should be according to above-mentioned required sampling frequency domain and final sample frequency
Between relationship be adjusted.It is f in the sample frequency of time-domain signal generated after IDFTRA, sampling interval TRA=
1/fRA, then the circulating prefix-length added isWherein,For the circulation calculated according to IDFT points
Prefix points can be predefined according to leader sequence format.
In view of being not above maximum sample frequency as defined in 5G, therefore for various possible time-domain sampling intervals
A liter sampling can be used in subsequent sampling interval adjustment, will be after IDFT, possible time domain repeat and add cyclic prefix
Time-domain signal carries out a liter sampling, generates and meets time-domain signal as defined in 5G system using rate.
Due to there is no frequency domain position to select (in flow chart shown in Fig. 6, completing using sub-carrier selection) in foregoing schemes,
Therefore it needs to carry out frequency domain position adjustment to the time-domain signal of generation.In view of frequency domain position reflection is phase tune in the time domain
It is whole, therefore the module carries out phase adjustment for the time-domain signal of generation.
One specific example is, if the first subcarrier of leader sequence needs the deviation post φ on frequency domaink, then time point t
Signal need the phase adjustment that carries out to beIf considering the influence of CP, phase adjustment be should beWherein TcFor systematic sampling rate.It should be noted that the frequency offset position in this example be with
What the subcarrier spacing Δ f of up channel was measured.It is measured, is then needed according to the subcarrier spacing of random access channel
Modification is made to formula, the phase adjustment of time point t isIf considering the influence of CP, phase adjustment
ForWherein, K=Δ f/ Δ fRA。
In aforementioned exemplary, leader sequence is defined in the time domain, it is therefore desirable to which progress DFT transforms it into frequency domain letter first
Number.Another simple mode is, the use of length is directly LRAFrequency domain sequence, i.e., directly use sequences yU, v(k) or sequenceAt this point, the flow chart for generating leader sequence baseband signal is as shown in Figure 8.
For realizing the computer executable instructions or program of various embodiments of the present invention function, can recorde can in computer
It reads on storage medium.It can be by making computer system read the program that be recorded in the recording medium and executing these programs
To realize corresponding function.So-called " computer system " herein can be built-in the computer system in the equipment, can be with
Including operating system or hardware (such as peripheral equipment)." computer readable storage medium " can be semiconductor recording medium, optics
Recording medium, magnetic recording medium, the in short-term recording medium of dynamic memory program or any other computer-readable record are situated between
Matter.
It can be by circuit (for example, monolithic or more with the various feature or function modules of equipment in the above-described embodiments
Piece integrated circuit) Lai Shixian or execution.The circuit for being designed to carry out this specification described function may include general place
Reason device, digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array (FPGA) or other can compile
Any combination of journey logical device, discrete door or transistor logic, discrete hardware component or above-mentioned device.General procedure
Device can be microprocessor, be also possible to any existing processor, controller, microcontroller or state machine.Foregoing circuit can
To be digital circuit, it is also possible to analog circuit.There is the new of the existing integrated circuit of substitution because of the progress of semiconductor technology
Integrated circuit technique in the case where, these new integrated circuit techniques also can be used in one or more embodiments of the invention
To realize.
Those skilled in the art of the present technique are appreciated that the disclosure includes being related to for executing in operation described herein
One or more equipment.These equipment can specially design and manufacture for required purpose, or also may include general
Known device in computer.These equipment have the computer program being stored in it, these computer programs are selectively
Activation or reconstruct.Such computer program can be stored in equipment (for example, computer) readable medium or be stored in
It e-command and is coupled in any kind of medium of bus respectively suitable for storage, the computer-readable medium includes but not
Be limited to any kind of disk (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only
Read memory), RAM (Random AcceSS Memory, immediately memory), EPROM (EraSable Programmable
Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically EraSable
Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or light card
Piece.It is, readable medium includes by equipment (for example, computer) with any Jie for the form storage or transmission information that can be read
Matter.
Those skilled in the art of the present technique be appreciated that can be realized with computer program instructions these structure charts and/or
The combination of each frame and these structure charts and/or the frame in block diagram and/or flow graph in block diagram and/or flow graph.This technology neck
Field technique personnel be appreciated that these computer program instructions can be supplied to general purpose computer, special purpose computer or other
The processor of programmable data processing method is realized, to pass through the processing of computer or other programmable data processing methods
The scheme specified in frame or multiple frames of the device to execute structure chart and/or block diagram disclosed in the disclosure and/or flow graph.
Those skilled in the art of the present technique have been appreciated that in the disclosure the various operations crossed by discussion, method, in process
Steps, measures, and schemes can be replaced, changed, combined or be deleted.Further, each with what is crossed by discussion in the disclosure
Kind of operation, method, other steps, measures, and schemes in process may also be alternated, changed, rearranged, decomposed, combined or deleted.
Further, in the prior art to have and the step in various operations, method disclosed in the disclosure, process, measure, scheme
It may also be alternated, changed, rearranged, decomposed, combined or deleted.
The above is only some embodiments of the disclosure, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from disclosure principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the disclosure.
Claims (9)
1. a kind of method for determining frequency offset parameter of the leader sequence in random access channel, comprising:
Obtain the random access channel subcarrier spacing Δ f from base stationRA, preamble sequence length LRABetween up channel subcarrier
Every Δ f；And
According to acquired random access channel subcarrier spacing Δ fRA, preamble sequence length LRAWith up channel subcarrier spacing
Δ f determines frequency offset parameter of the leader sequence in random access channel
2. according to the method described in claim 1, wherein determining frequency offset parameter of the leader sequence in random access channel
Further comprise:
Frequency offset parameter of the leader sequence in random access channel is calculated according to the following formula
Wherein, NuIndicate the number for being used as the subcarrier of guard band in random access channel, symbol [] indicates floor operation.
3. according to the method described in claim 1, wherein determining frequency offset parameter of the leader sequence in random access channel
A poor step includes:
Frequency offset parameter of the leader sequence in random access channel is calculated according to the following formula
Wherein, NuIndicate the number for being used as the subcarrier of guard band in random access channel, symbol [] indicates floor operation.
4. according to the method described in claim 1, wherein determining frequency offset parameter of the leader sequence in random access channel
Further comprise:
Frequency offset parameter of the leader sequence in random access channel is calculated according to the following formula
Wherein, NuIndicate the number for being used as the subcarrier of guard band in random access channel, symbol [] indicates floor operation.
5. the method according to any one of claim 2-4, wherein
WhereinFor the random access channel Physical Resource Block number of every up channel subcarrier spacing Δ f
SymbolFor upper floor operation, wherein NscFor the subcarrier number of a Physical Resource Block.
6. the method according to any one of claim 2-4, wherein obtaining N according to following mapping tableu:
7. according to the method described in claim 1, wherein determining frequency offset parameter of the leader sequence in random access channel
Further comprise:
Frequency offset parameter of the leader sequence in random access channel is determined according to one of following mapping table
8. a kind of user equipment (UE), comprising:
Processor；And
Memory is stored with computer executable instructions, and described instruction makes processor execute following behaviour when being executed by processor
Make:
Obtain the random access channel subcarrier spacing Δ f from base stationRA, preamble sequence length LRABetween up channel subcarrier
Every Δ f；And
According to acquired random access channel subcarrier spacing Δ fRA, preamble sequence length LRAWith up channel subcarrier spacing
Δ f determines frequency offset parameter of the leader sequence in random access channel
9. a kind of computer-readable medium, is stored with instruction on it, described instruction when executed by the processor, makes the processing
Device executes method according to any one of claim 1 to 7.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211269632.9A CN115643645A (en) | 2018-01-19 | 2018-01-19 | Frequency domain offset parameter determination method, user equipment and computer readable medium |
| CN201810057947.4A CN110062472B (en) | 2018-01-19 | 2018-01-19 | Frequency domain offset parameter determination method, user equipment and computer readable medium |
| KR1020190004172A KR20190085881A (en) | 2018-01-11 | 2019-01-11 | Method of determining frequency-domain offset parameter, ue, random access method, method for configuring random access information, corresponding device and computer readable medium |
| PCT/KR2019/000506 WO2019139426A1 (en) | 2018-01-11 | 2019-01-11 | Method of determining frequency-domain offset parameter, user equipment (ue), random access method, method for configuring random access information, corresponding device and computer readable medium |
| EP19738844.0A EP3698595A4 (en) | 2018-01-11 | 2019-01-11 | Method of determining frequency-domain offset parameter, user equipment (ue), random access method, method for configuring random access information, corresponding device and computer readable medium |
| US16/245,850 US10986673B2 (en) | 2018-01-11 | 2019-01-11 | Method of determining frequency-domain offset parameter, user equipment (UE), random access method, method for configuring random access information, corresponding device and computer readable medium |
| US17/233,879 US11601988B2 (en) | 2018-01-11 | 2021-04-19 | Method of determining frequency-domain offset parameter, user equipment (UE), random access method, method for configuring random access information, corresponding device and computer readable medium |
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| EP4124148A4 (en) * | 2020-04-09 | 2023-03-29 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting random access signal |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104951A (en) * | 2009-12-17 | 2011-06-22 | 中兴通讯股份有限公司 | Method and device for timing shift estimation |
| US20110158104A1 (en) * | 2008-07-03 | 2011-06-30 | Telefonaktiebolaget L M Ericsson (Publ) | Determining Preamble Sequences For Random Access |
| US20160286578A1 (en) * | 2007-06-19 | 2016-09-29 | Texas Instruments Incorporated | Signaling of random access preamble parameters in wireless networks |
| CN105992385A (en) * | 2015-02-12 | 2016-10-05 | 苏州简约纳电子有限公司 | Physical random access channel (PRACH) signal generation method |
| US20170006637A1 (en) * | 2014-03-25 | 2017-01-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhanced PRACH Preamble Format |
| CN106357580A (en) * | 2015-07-15 | 2017-01-25 | 塔塔顾问服务有限公司 | Detecting physical random access channel preambles in a long term evolution communication system |
| US20170265230A1 (en) * | 2016-03-14 | 2017-09-14 | Futurewei Technologies, Inc. | System and Method for Random Access Backoffs |
-
2018
- 2018-01-19 CN CN201810057947.4A patent/CN110062472B/en active Active
- 2018-01-19 CN CN202211269632.9A patent/CN115643645A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160286578A1 (en) * | 2007-06-19 | 2016-09-29 | Texas Instruments Incorporated | Signaling of random access preamble parameters in wireless networks |
| US20110158104A1 (en) * | 2008-07-03 | 2011-06-30 | Telefonaktiebolaget L M Ericsson (Publ) | Determining Preamble Sequences For Random Access |
| CN102104951A (en) * | 2009-12-17 | 2011-06-22 | 中兴通讯股份有限公司 | Method and device for timing shift estimation |
| US20170006637A1 (en) * | 2014-03-25 | 2017-01-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhanced PRACH Preamble Format |
| CN105992385A (en) * | 2015-02-12 | 2016-10-05 | 苏州简约纳电子有限公司 | Physical random access channel (PRACH) signal generation method |
| CN106357580A (en) * | 2015-07-15 | 2017-01-25 | 塔塔顾问服务有限公司 | Detecting physical random access channel preambles in a long term evolution communication system |
| US20170265230A1 (en) * | 2016-03-14 | 2017-09-14 | Futurewei Technologies, Inc. | System and Method for Random Access Backoffs |
Non-Patent Citations (2)
| Title |
|---|
| HUAWEI: "Correct selection of Random access preamble and PRACH resource explicitly signalled to the UE NCT based random access procedure for high speed scenario", 《3GPP TSG-RAN5 MEETING #77：R5-176985》 * |
| TEXAS INSTRUMENTS: "Random Access Preamble Sequence Length for E-UTRA", 《3GPP TSG RAN WG1 #49：R1-072191》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4124148A4 (en) * | 2020-04-09 | 2023-03-29 | Huawei Technologies Co., Ltd. | Method and apparatus for transmitting random access signal |
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