CN108811160A - A kind of the accidental access signal sending method and device of multi-sub-band system - Google Patents
A kind of the accidental access signal sending method and device of multi-sub-band system 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
- 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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Abstract
The present invention provides a kind of the accidental access signal sending method and device of multi-sub-band system.The method includes configuring multiple covering grades for each cell in multi-sub-band system；It is that different covering grades configures different signal parameters according to preset signals multiplexing rule, so that UE is according to corresponding covering grade setting signal parameter, generates preamble signals and sent；The preset signals are multiplexed rule：Any one of frequency division multiplexing, code division multiplexing and time division multiplexing.The present invention is that each cell configures multiple covering grades, and different covering grades are distinguished with frequency division, code point or time-division, sent using different accidental access signal formats.UE selects corresponding covering grade according to oneself covering power, obtains the covering grade relevant parameter, is accessed with corresponding random signal format.The present invention can improve the demodulation performance of random access channel, and support system extensively covers demand.
Description
Technical field
The present invention relates to fields of communication technology, are sent more particularly, to a kind of accidental access signal of multi-sub-band system
Method and apparatus.
Background technology
Currently, multi-sub-band system selects M as broadcasting sub-band in several physics subbands, accidental access signal occupies
The uplink frame position of broadcasting sub-band, each radio frames have 4 random access channel to be used for different community；In this way in order to ensure 8
The cell cluster of a identical networking, each every 2 radio frames of cell have 8 random access channel, are time-multiplexed for 8 cells.
Each random access channel can support N number of user to carry out code and be tapped into simultaneously.Therefore, accidental access signal sending cycle is 2
Radio frames, i.e., at interval of 2 radio frames, once random access send opportunity, a but only random access guiding of transmission
Preamble signals, as shown in Figure 5.
With flourishing for the continuous development and mobile Internet and Internet of Things industry for wirelessly communicating new technology, respectively
Industry drastically expands the business demand of low rate, low cost, wide covering and large capacity.Each of current multi-sub-band system connects
Enter only send a random access guiding preamble signal, the channel demodulation of this random access transmission scheme in the period
Performance is not enough to the demand for supporting extensively to cover.
Invention content
The present invention provide a kind of multi-sub-band system for overcoming the above problem or solving the above problems at least partly with
Machine accesses signaling method and device.
According to an aspect of the present invention, a kind of accidental access signal sending method of multi-sub-band system is provided, including：
Multiple covering grades are configured for each cell in multi-sub-band system；
It is that different covering grades configures different signal parameters according to preset signals multiplexing rule, so that UE is according to correspondence
Covering grade setting signal parameter, generate preamble signals sent；
The preset signals are multiplexed rule：Any one of frequency division multiplexing, code division multiplexing and time division multiplexing.
Further, the configuration of the signal parameter includes：
When preset signals multiplexing rule is frequency division multiplexing, different PRACH moneys are configured for different covering grades
Source number；Identical or different preamble code numbers are configured for different covering grades；
When preset signals multiplexing rule is code division multiplexing, different PRACH moneys are configured for different covering grades
Source number；Identical or different preamble code numbers are configured for different covering grades；It is configured for different covering grades different
The PRACH periods；
When preset signals multiplexing rule is is time-multiplexed, different PRACH moneys are configured for different covering grades
Source number；Identical or different preamble code numbers are configured for different covering grades；It is identical for different covering grade configurations
The PRACH periods；Different initial time offsets is configured for different covering grades.
Further, described to be according to preset signals multiplexing rule when preset signals multiplexing rule is frequency division multiplexing
Different covering grades configures different signal parameters and further comprises：
When there is i covering grade, M broadcasting sub-band is divided into i covering grade and accesses subband, the signal parameter
Configuration is as follows：
The PRACH number of resources of the i covering grade access subband is configured to：{Nrep_F1, Nrep_F2..., Nrep_
Fi}；
The preamble code numbers of the i covering grade access subband are configured to：
{Npreamble_F1, Npreamble_F2..., Npreamble_Fi}；
Wherein, i is the natural number more than or equal to 1.
Further, described to be according to preset signals multiplexing rule when preset signals multiplexing rule is code division multiplexing
Different covering grades configures different signal parameters and further comprises：
When there is i covering grade, the code resource of each random access channel is divided into i covering grade code character, institute
It is as follows to state signal parameter configuration：
The PRACH number of resources of the i covering grade code character is configured to：{Nrep_C1, Nrep_C2..., Nrep_Ci}；
The PRACH period assignments of the i covering grade code character are：{Ncycle_C1,Ncycle_C2..., Ncycle_
Ci}；
The preamble code numbers of the i covering grade code character are configured to：{Npreamble_C1, Npreamble_
C2..., Npreamble_Ci}；
Wherein, i is the natural number more than or equal to 1.
Further, described to be according to preset signals multiplexing rule when preset signals multiplexing rule is is time-multiplexed
Different covering grades configures different signal parameters and further comprises：
When there is i covering grade, the time-domain resource of each random access channel is divided into i covering grade time domain,
The signal parameter configuration is as follows：
The PRACH number of resources of the i covering grade time domain is configured to：{Nrep_T1, Nrep_T2..., Nrep_Ti}；
The PRACH period assignments of the i covering grade time domain are：{Ncycle_T1,Ncycle_T2..., Ncycle_
Ti}；
The initial time offset configuration of the i covering grade time domain is：{Start_T1, Start_T2..., Start_
Ti}；
The preamble code numbers of the i covering grade time domain are configured to：{Npreamble_T1, Npreamble_
T2..., Npreamble_Ti}；
Wherein, i is the natural number more than or equal to 1.
According to another aspect of the present invention, a kind of accidental access signal sending method of multi-sub-band system is also provided, is wrapped
It includes：
UE is measured by RSRP, obtains itself covering grade；
Based on itself covering grade and preset signals multiplexing rule corresponding signal parameter configuration, selection it is described itself
The corresponding broadcasting sub-band of the covering grade either corresponding preamble code or described of itself covering grade
The corresponding time domain of itself covering grade, and setting signal parameter generate preamble signals；
The preamble signals are sent using the random access channel of the uplink frame of a broadcasting sub-band.
Further, believe when the random access channel of the uplink frame using a broadcasting sub-band sends the preamble
After number failure, is improved based on itself covering grade and regenerate preamble signals after a covering grade and sent.
Further, the signal parameter, which configures, includes：
It is different coverings etc. when preset signals multiplexing rule is frequency division multiplexing, code division multiplexing or time division multiplexing
Grade configures identical or different PRACH number of resources；Identical or different preamble code numbers are configured for different covering grades；
When preset signals multiplexing rule is code division multiplexing, configured for different covering grades identical or different
The PRACH periods；
When preset signals multiplexing rule is is time-multiplexed, configured identical PRACH weeks for different covering grades
Phase；Different initial time offsets is configured for different covering grades.
Further, the corresponding signal parameter of the preset signals multiplexing rule, which configures, includes：
When preset signals multiplexing rule is frequency division multiplexing, M broadcasting sub-band is divided into i covering grade access
Subband, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade access subband is configured to：{Nrep_F1, Nrep_F2..., Nrep_
Fi}；
The preamble code numbers of the i covering grade access subband are configured to：{Npreamble_F1,
Npreamble_F2..., Npreamble_Fi}；
Wherein, i is the natural number more than or equal to 1.
Further, the corresponding signal parameter of the preset signals multiplexing rule, which configures, includes：
When preset signals multiplexing rule is code division multiplexing, the code resource of each random access channel is divided into i
A covering grade code character, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade code character is configured to：{Nrep_C1, Nrep_C2..., Nrep_Ci}；
The PRACH period assignments of the i covering grade code character are：{Ncycle_C1,Ncycle_C2..., Ncycle_
Ci}；
The preamble code numbers of the i covering grade code character are configured to：{Npreamble_C1, Npreamble_
C2..., Npreamble_Ci}；
Wherein, i is the natural number more than or equal to 1.
Further, the corresponding signal parameter of the preset signals multiplexing rule, which configures, includes：
When preset signals multiplexing rule is is time-multiplexed, the time-domain resource of each random access channel is divided into
I covering grade time domain, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade time domain is configured to：{Nrep_T1, Nrep_T2..., Nrep_Ti}；
The PRACH period assignments of the i covering grade time domain are：{Ncycle_T1,Ncycle_T2..., Ncycle_
Ti}；
The initial time offset configuration of the i covering grade time domain is：{Start_T1, Start_T2..., Start_
Ti}；
The preamble code numbers of the i covering grade time domain are configured to：{Npreamble_T1, Npreamble_
T2..., Npreamble_Ti}；
Wherein, i is the natural number more than or equal to 1.
According to another aspect of the present invention, a kind of accidental access signal sending device of multi-sub-band system is also provided, is wrapped
It includes：
Covering grade configuration module, for configuring multiple covering grades for each cell in multi-sub-band system；And
Signal parameter configuration module, for being that different covering grades configures different letters according to preset signals multiplexing rule
Number parameter generates preamble signals and is sent so that UE is according to corresponding covering grade setting signal parameter；It is described default
Signal multiplexing rule is：Any one of frequency division multiplexing, code division multiplexing and time division multiplexing.
According to another aspect of the present invention, a kind of accidental access signal sending device of multi-sub-band system is also provided, is wrapped
It includes：
Grade acquisition module is measured by RSRP for UE, obtains itself covering grade；
Signal generation module, for based on itself covering grade and the corresponding signal parameter of preset signals multiplexing rule
Configuration selects the corresponding broadcasting sub-band of itself covering grade or itself covering grade one corresponding
Preamble codes or the corresponding time domain of itself covering grade, and setting signal parameter generate preamble letters
Number；And
Signal transmitting module is used for described in the random access channel transmission using the uplink frame of a broadcasting sub-band
Preamble signals.
The present invention proposes a kind of the accidental access signal sending method and device of multi-sub-band system, is configured for each cell more
A covering grade, different covering grades are distinguished with frequency division, code point or time-division, and different covering grades are using different random
Access signal format is sent.UE selects corresponding covering grade according to oneself covering power, obtains covering grade correlation
Parameter is accessed with corresponding random signal format.The present invention can improve the demodulation performance of random access channel, support system
The demand that system extensively covers.
Description of the drawings
Fig. 1 is a kind of accidental access signal sending method base station side flow chart of multi-sub-band system of the embodiment of the present invention；
Fig. 2 is covering grade code character schematic diagram of the embodiment of the present invention；
Fig. 3 is covering grade time domain schematic diagram of the embodiment of the present invention；
Fig. 4 is a kind of sides the accidental access signal sending method UE flow chart of multi-sub-band system of the embodiment of the present invention；
Fig. 5 is the prior art and accidental access signal frame format schematic diagram of the embodiment of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, the specific implementation mode of the present invention is described in further detail.Implement below
Example is not limited to the scope of the present invention for illustrating the present invention.
As shown in Figure 1, a kind of accidental access signal sending method of multi-sub-band system, including：
Multiple covering grades are configured for each cell in multi-sub-band system；
It is that different covering grades configures different signal parameters according to preset signals multiplexing rule, so that UE is according to correspondence
Covering grade setting signal parameter, generate preamble signals sent；
The preset signals are multiplexed rule：Any one of frequency division multiplexing, code division multiplexing and time division multiplexing.
The present embodiment is base station side covering grade configuration flow, and base station is that each cell configures multiple covering grades, different
Covering grade is distinguished with any in frequency division, code point and time-division, and each covering grade configures different signal parameters.It is logical
It crosses in the setting of different covering grades, and different covering grades and configures different signal parameters, random access letter can be improved
The demodulation performance in road, support system extensively cover demand.Different accidental access signals can be used when in different covering grades in UE
Format is sent.
In one embodiment, each cell in multi-sub-band system configures multiple covering grades and further wraps
It includes：
RSRP (Reference Signal Receiving based on each cell and each cell
Power, Reference Signal Received Power) measurement parameter, the user in cell is divided into multiple covering grades.
Dividing for specific covering grade can be true according to the performance requirement of system, the access customer number etc. of current area
It is fixed, it does not limit herein.In general, covering grade from high to low or from low to high, there is difference；The lower use of covering grade
The user of family, that is, spreadability difference can high number of repetition send preamble signals, the higher user, that is, spreadability of covering grade is good
User can with low number of repetition send preamble signals.In the sides UE, UE is measured by RSRP, obtains the spreadability of oneself
Can, that is, correspond to different covering grades；Then access, if access failure, Ke Yiti are attempted with corresponding covering grade
A high covering grade attempts access until being successfully accessed.
In one embodiment, base station passes through MIB (Master Information Block) or SIB (System
Information Block) it is that the multiple covering grade configures different signal parameters.
In one embodiment, the configuration of the signal parameter includes：
When preset signals multiplexing rule is frequency division multiplexing, different PRACH moneys are configured for different covering grades
Source number；Identical or different preamble code numbers are configured for different covering grades；
When preset signals multiplexing rule is code division multiplexing, different PRACH moneys are configured for different covering grades
Source number；Identical or different preamble code numbers are configured for different covering grades；It is configured for different covering grades different
The PRACH periods；
When preset signals multiplexing rule is is time-multiplexed, different PRACH moneys are configured for different covering grades
Source number；Identical or different preamble code numbers are configured for different covering grades；It is identical for different covering grade configurations
The PRACH periods；Different initial time offsets is configured for different covering grades.
In the present embodiment, three kinds of multiplex modes are required for configuration PRACH number of resources and preamble code numbers；In addition code point
The configuration PRACH periods are also needed to when multiplexing, when time division multiplexing also needs to configuration PRACH periods and initial time offset.Following
It is specifically described by three embodiments.
In one embodiment, described multiple according to preset signals when preset signals multiplexing rule is frequency division multiplexing
It is that different covering grades configures different signal parameters and further comprises with rule：
When there is i covering grade, M broadcasting sub-band is divided into i covering grade and accesses subband, the signal parameter
Configuration is as follows：
The PRACH number of resources of the i covering grade access subband is configured to：{Nrep_F1, Nrep_F2..., Nrep_
Fi}；
The preamble code numbers of the i covering grade access subband are configured to：{Npreamble_F1,
Npreamble_F2..., Npreamble_Fi}；
Wherein, i is the natural number more than or equal to 1.
The present embodiment comes to carry out signal parameter configuration to different covering grades with frequency division multiplexing.From Nrep_F1To Nrep_Fi
The corresponding PRACH number of resources of respectively i covering grade, i.e., different covering grades access the weight of the preamble codes on subband
Multiple transmission times；UE repeats to send preamble codes in corresponding subband according to itself covering grade.
From Npreamble_F1To Npreamble_FiThe corresponding preamble codes number of respectively i covering grade, due to
Frequency division multiplexing is that code, that is, yardage on different subbands, therefore on each subband is independent of each other, therefore the corresponding yardage of each subband
It may be the same or different, account for as the case may be.UE is according to itself covering grade in corresponding preamble codes
A preamble code is randomly choosed in range；Wherein, in the covering grade that non-competing user can select number of repetition minimum
Part code resource.
In one embodiment, described multiple according to preset signals when preset signals multiplexing rule is code division multiplexing
It is that different covering grades configures different signal parameters and further comprises with rule：
When there is i covering grade, the code resource of each random access channel is divided into i covering grade code character, institute
It is as follows to state signal parameter configuration：
The PRACH number of resources of the i covering grade code character is configured to：{Nrep_C1, Nrep_C2..., Nrep_Ci}；
The PRACH period assignments of the i covering grade code character are：{Ncycle_C1,Ncycle_C2..., Ncycle_
Ci}；
The preamble code numbers of the i covering grade code character are configured to：{Npreamble_C1, Npreamble_
C2..., Npreamble_Ci}；
Wherein, i is the natural number more than or equal to 1.
The present embodiment comes to carry out signal parameter configuration to different covering grades with code division multiplexing.On the whole, in same height
With in same random access channel, the preamble code character codes number of different covering grades is different, and PRACH number of resources is different,
PRACH sending cycles are also different.Certainly in multiple and different covering grades also can there are covering grade code number phase
Same situation.
From Nrep_C1To Nrep_CiThe corresponding PRACH number of resources of respectively i covering grade, i.e., different covering grades
The repetition transmission times of preamble codes in code character；UE repeats to send out according to itself covering grade with corresponding PRACH number of resources
Send preamble codes.
From Ncycle_C1To Ncycle_CiThe corresponding PRACH sending cycles of respectively i covering grade, UE is according to itself
Covering grade sends preamble codes in corresponding PRACH sending cycles.
From Npreamble_C1To Npreamble_CiThe corresponding preamble codes number of respectively i covering grade, UE are pressed
A preamble code is randomly choosed in corresponding preamble codes range according to itself covering grade；Wherein, non-competing user
Part code resource in the covering grade that number of repetition can be selected minimum.
In one embodiment, described multiple according to preset signals when preset signals multiplexing rule is is time-multiplexed
It is that different covering grades configures different signal parameters and further comprises with rule：
When there is i covering grade, the time-domain resource of each random access channel is divided into i covering grade time domain,
The signal parameter configuration is as follows：
The PRACH number of resources of the i covering grade time domain is configured to：{Nrep_T1, Nrep_T2..., Nrep_Ti}；
The PRACH period assignments of the i covering grade time domain are：{Ncycle_T1,Ncycle_T2..., Ncycle_
Ti}；
The initial time offset configuration of the i covering grade time domain is：{Start_T1, Start_T2..., Start_
Ti}；
The preamble code numbers of the i covering grade time domain are configured to：{Npreamble_T1, Npreamble_
T2..., Npreamble_Ti}；
Wherein, i is the natural number more than or equal to 1.
The present embodiment carries out signal parameter configuration to be time-multiplexed to different covering grades.It is divided from the time different
Covering grade turn-on time window, in different covering grade turn-on time windows, PRACH number of resources difference, that is, preamble repeats to send
Number is different.Certainly the PRACH number of resources for being also not excluded for part covering grade is identical.UE is selected according to the covering power of oneself
Different turn-on time windows.Access initial position is PRACH resource time start offsets.The PRACH periods of different covering grades
Unanimously, i.e. Ncycle_T1=Ncycle_T2=...=Ncycle_Ti。
From Nrep_T1To Nrep_TiThe corresponding PRACH number of resources of respectively i covering grade, i.e., different covering grades
The repetition transmission times of preamble codes in code character；UE repeats to send out according to itself covering grade with corresponding PRACH number of resources
Send preamble codes.
From Ncycle_T1To Ncycle_TiThe corresponding PRACH sending cycles of respectively i covering grade, in the present embodiment
The sending cycle of each covering grade is identical.
From Start_T1To Start_TiThe corresponding PRACH resources initial time offset of respectively i covering grade, UE are pressed
Preamble codes are sent with the corresponding start offset time according to itself covering grade.
From Npreamble_T1To Npreamble_TiThe corresponding preamble codes number of respectively i covering grade, UE are pressed
A preamble code is randomly choosed in corresponding preamble codes range according to itself covering grade；Wherein, non-competing user
Part code resource in the covering grade that number of repetition can be selected minimum.
Illustrate covering grade of the present invention and its signal parameter configuration below by specific embodiment.With each random
Channel 8 users of support are accessed, for certain cell supports 3 covering grades, subband differentiation, code point timely subregion point are covered etc.
The transmission hair method of grade is described as follows：
(1) frequency division, that is, subband distinguishes covering grade：M broadcasting sub-band is divided into according to the number of users of different covering grades
Different covering grades accesses subband, and different covering grades accesses subband preamble and repeats transmission times difference.UE according to
The covering grade of selection repeats to send preamble codes in corresponding subband.
Signal parameter configuration is as follows：
PRACH number of resources：{ Nrep1, Nrep2, Nrep3 }；
The preamble code numbers of each covering grade be Npreamble-Npreamble_noncompete,
Npreamble, Npreamble }, the part code resource in the minimum covering grade of non-competing user occupancy number of repetition；UE is pressed
A preamble code is randomly choosed in corresponding preamble codes range according to the covering grade of selection.
(2) code subregion divides covering grade：By the code resource of each random access channel, according to the user of different covering grades
Quantity is divided into different covering grade code characters.UE is selected according to the covering grade of selection in corresponding preamble codes range at random
Select a preamble code.The preamble code character codes number of different covering grades is different, repeats transmission times difference, sends week
Phase is also different.
Signal parameter configuration is as follows：
PRACH number of resources：{ Nrep1, Nrep2, Nrep3 }；
The PRACH periods：{ Ncycle1, Ncycle2, Ncycle3 }；
Preamble code numbers：{ Npreamble1, Npreamble2, Npreamble3 }.
As illustrated in fig. 2, it is assumed that have 0-7 totally 8 code resources, the code minimum to one number of repetition of non-competing resource allocation money
Source, covering grade 1 distribute 4 code resources, and covering grade 2 distributes 2 code resources, and covering grade 3 distributes 1 code resource.
(3) time-division distinguishes covering grade：Different covering grade turn-on time windows, different covering grades are divided from the time
In turn-on time window, it is different that preamble repeats transmission times.UE selects different turn-on times according to the covering power of oneself
Window.Access initial position is PRACH resource time start offsets.The PRACH periods, each covering grade was consistent.
Signal parameter configuration is as follows：
PRACH number of resources：{ Nrep1, Nrep2, Nrep3 }；
PRACH resource time start offsets：{ StartT1, StartT 2, StartT 3 }；
The PRACH periods：Ncycle；
The preamble code numbers of each covering grade be Npreamble-Npreamble_noncompete,
Npreamble, Npreamble }, the part code resource in the minimum covering grade of non-competing user occupancy number of repetition；UE is pressed
A preamble code is randomly choosed in corresponding preamble codes range according to the covering grade of selection.
As shown in figure 3, the PRACH periods all in the present embodiment are consistent, the different covering grades within a PRACH period
Turn-on time start offset it is different.
As shown in figure 4, the present invention also provides a kind of accidental access signal sending methods of multi-sub-band system, including：
UE is measured by RSRP, obtains itself covering grade；
Based on itself covering grade and preset signals multiplexing rule corresponding signal parameter configuration, selection it is described itself
The corresponding broadcasting sub-band of the covering grade either corresponding preamble code or described of itself covering grade
The corresponding time domain of itself covering grade, and setting signal parameter generate preamble signals；
The preamble signals are sent using the random access channel of the uplink frame of a broadcasting sub-band.
The present embodiment is that UE lateral roots configure signal parameter according to covering grade and send the flow of signal.Pass through with base station side
RSRP (Reference Signal Receiving Power, Reference Signal Received Power), which is measured, divides covering grade correspondence
, UE measures the covering grade where obtaining oneself by RSRP, the signal parameter configuration of the covering grade is obtained, with corresponding
Random signal format is accessed.
Preset signals multiplexing rule with specific reference to this cell is frequency division multiplexing, code division multiplexing or time division multiplexing, and is selected
The corresponding broadcasting sub-band of itself covering grade or the corresponding preamble code of itself covering grade,
Or the corresponding time domain of itself covering grade, and configured according to other signal parameters and complete setting for signal parameter
It sets, generates preamble signals.The present embodiment can improve the demodulation performance of random access channel, and support system, which extensively covers, to be needed
It asks.
Specifically, generating preamble signals as follows：
1. generating ZC sequences using root parameter u：
2. generating frequency-region signal by DFT：
3. intermediate zero padding is to NSEQPoint：
X=[Xu((Nzc-1)/2),…,Xu(Nzc-1),0,0,…,0,Xu(0),Xu(1),…Xu((Nzc-1)/2-1)]
Simultaneously cyclic shift obtains PRACH basic sequences to 4.IDFT：
su(n)=circshift (ifft (X (k)), Ncp)/(NZC/NSEQ)。
The preamble signals can be made multiple users while being accessed by different displacements.Wherein, NZCFor ZC sequence lengths,
Ncp is circulating prefix-length, NSEQFor PRACH sequence lengths, ifft () is inverse Fourier transform function, and circshift () is
Cyclic shift function.
In the present embodiment, the random access channel of the uplink frame using a broadcasting sub-band sends the preamble
Signal, as shown in figure 5, the random access channel by multi-sub-band system in the prior art sends preamble signals.
In one embodiment, described in being sent when the random access channel of the uplink frame using a broadcasting sub-band
After preamble Signal Fails, preamble signals are regenerated after improving a covering grade based on itself covering grade
It is sent.
Present embodiments provide the processing method after a kind of signal access failure.If UE is in itself current covering grade
Signal Fail is accessed, then a covering grade is improved, to improve the probability that signal is successfully accessed.
The signal parameter configures：
In one embodiment, when preset signals multiplexing rule is frequency division multiplexing, code division multiplexing or time division multiplexing,
Identical or different PRACH number of resources is configured for different covering grades；It is configured for different covering grades identical or different
Preamble code numbers；
When preset signals multiplexing rule is code division multiplexing, configured for different covering grades identical or different
The PRACH periods；
When preset signals multiplexing rule is is time-multiplexed, configured identical PRACH weeks for different covering grades
Phase；Different initial time offsets is configured for different covering grades.
The signal parameter configuration consistency of the present embodiment and base station side.
In one embodiment, the corresponding signal parameter of the preset signals multiplexing rule, which configures, includes：
When preset signals multiplexing rule is frequency division multiplexing, M broadcasting sub-band is divided into i covering grade access
Subband, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade access subband is configured to：{Nrep_F1, Nrep_F2..., Nrep_
Fi}；
The preamble code numbers of the i covering grade access subband are configured to：{Npreamble_F1,
Npreamble_F2..., Npreamble_Fi}；
Wherein, i is the natural number more than or equal to 1.
The signal parameter configuration consistency of the present embodiment and base station side, the preset signals multiplexing rule is frequency division multiplexing.
In one embodiment, the corresponding signal parameter of the preset signals multiplexing rule, which configures, includes：
When preset signals multiplexing rule is code division multiplexing, the code resource of each random access channel is divided into i
A covering grade code character, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade code character is configured to：{Nrep_C1, Nrep_C2..., Nrep_Ci}；
The PRACH period assignments of the i covering grade code character are：{Ncycle_C1,Ncycle_C2..., Ncycle_
Ci}；
The preamble code numbers of the i covering grade code character are configured to：{Npreamble_C1, Npreamble_
C2..., Npreamble_Ci}；
Wherein, i is the natural number more than or equal to 1.
The signal parameter configuration consistency of the present embodiment and base station side, the preset signals multiplexing rule is code division multiplexing.
In one embodiment, the corresponding signal parameter of the preset signals multiplexing rule, which configures, includes：
When preset signals multiplexing rule is is time-multiplexed, the time-domain resource of each random access channel is divided into
I covering grade time domain, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade time domain is configured to：{Nrep_T1, Nrep_T2..., Nrep_Ti}；
The PRACH period assignments of the i covering grade time domain are：{Ncycle_T1,Ncycle_T2..., Ncycle_
Ti}；
The initial time offset configuration of the i covering grade time domain is：{Start_T1, Start_T2..., Start_
Ti}；
The preamble code numbers of the i covering grade time domain are configured to：{Npreamble_T1, Npreamble_
T2..., Npreamble_Ti}；
Wherein, i is the natural number more than or equal to 1.
The signal parameter configuration consistency of the present embodiment and base station side, the preset signals multiplexing rule is time division multiplexing.
The present invention also provides a kind of accidental access signal sending devices of multi-sub-band system, including：
Covering grade configuration module, for configuring multiple covering grades for each cell in multi-sub-band system；And
Signal parameter configuration module is difference according to preset signals multiplexing rule for being based on the multiple covering grade
Covering grade configure different signal parameters, so that UE is according to corresponding covering grade setting signal parameter, generate
Preamble signals are sent；The preset signals are multiplexed rule：Appointing in frequency division multiplexing, code division multiplexing and time division multiplexing
It is a kind of.
The present invention also provides a kind of accidental access signal sending devices of multi-sub-band system, including：
Grade acquisition module is measured by RSRP for UE, obtains itself covering grade；
Signal generation module, for based on itself covering grade and the corresponding signal parameter of preset signals multiplexing rule
Configuration selects the corresponding broadcasting sub-band of itself covering grade or itself covering grade one corresponding
Preamble codes or the corresponding time domain of itself covering grade, and setting signal parameter generate preamble letters
Number；And
Signal transmitting module is used for described in the random access channel transmission using the uplink frame of a broadcasting sub-band
Preamble signals.
The present invention proposes a kind of the accidental access signal sending method and device of multi-sub-band system, is configured for each cell more
A covering grade, different covering grades are distinguished with frequency division, code point or time-division, and different covering grades are using different random
Access signal format is sent.UE selects corresponding covering grade according to oneself covering power, obtains covering grade correlation
Parameter is accessed with corresponding random signal format.The present invention can meet wireless communication technique development in low rate, it is low at
Originally, the business demand of wide covering and large capacity, improves the demodulation performance of random access channel, the demand that support system extensively covers.
Finally, method of the invention is only preferable embodiment, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention
Within the scope of.
Claims (10)
1. a kind of accidental access signal sending method of multi-sub-band system, which is characterized in that including：
Multiple covering grades are configured for each cell in multi-sub-band system；
It is that different covering grades configures different signal parameters according to preset signals multiplexing rule, so that UE is covered according to corresponding
Lid hierarchy designating signal parameter generates preamble signals and is sent；
The preset signals are multiplexed rule：Any one of frequency division multiplexing, code division multiplexing and time division multiplexing.
2. method as described in claim 1, which is characterized in that the configuration of the signal parameter includes：
When preset signals multiplexing rule is frequency division multiplexing, different PRACH number of resources is configured for different covering grades；
Identical or different preamble code numbers are configured for different covering grades；
When preset signals multiplexing rule is code division multiplexing, different PRACH number of resources is configured for different covering grades；
Identical or different preamble code numbers are configured for different covering grades；It is configured for different covering grades different
The PRACH periods；
When preset signals multiplexing rule is is time-multiplexed, different PRACH number of resources is configured for different covering grades；
Identical or different preamble code numbers are configured for different covering grades；It is identical for different covering grade configurations
The PRACH periods；Different initial time offsets is configured for different covering grades.
3. method as claimed in claim 2, which is characterized in that described when preset signals multiplexing rule is frequency division multiplexing
Different signal parameters is configured according to preset signals multiplexing rule for different covering grades to further comprise：
When there is i covering grade, M broadcasting sub-band is divided into i covering grade and accesses subband, the signal parameter configuration
It is as follows：
The PRACH number of resources of the i covering grade access subband is configured to：{Nrep_F1, Nrep_F2..., Nrep_Fi}；
The preamble code numbers of the i covering grade access subband are configured to：{Npreamble_F1, Npreamble_
F2..., Npreamble_Fi}；
Wherein, i is the natural number more than or equal to 1.
4. method as claimed in claim 2, which is characterized in that described when preset signals multiplexing rule is code division multiplexing
Different signal parameters is configured according to preset signals multiplexing rule for different covering grades to further comprise：
When there is i covering grade, the code resource of each random access channel is divided into i covering grade code character, the letter
Number parameter configuration is as follows：
The PRACH number of resources of the i covering grade code character is configured to：{Nrep_C1, Nrep_C2..., Nrep_Ci}；
The PRACH period assignments of the i covering grade code character are：{Ncycle_C1,Ncycle_C2..., Ncycle_Ci}；
The preamble code numbers of the i covering grade code character are configured to：{Npreamble_C1, Npreamble_C2...,
Npreamble_Ci}；
Wherein, i is the natural number more than or equal to 1.
5. method as claimed in claim 2, which is characterized in that described when preset signals multiplexing rule is is time-multiplexed
Different signal parameters is configured according to preset signals multiplexing rule for different covering grades to further comprise：
When there is i covering grade, the time-domain resource of each random access channel is divided into i covering grade time domain, it is described
Signal parameter configuration is as follows：
The PRACH number of resources of the i covering grade time domain is configured to：{Nrep_T1, Nrep_T2..., Nrep_Ti}；
The PRACH period assignments of the i covering grade time domain are：{Ncycle_T1,Ncycle_T2..., Ncycle_Ti}；
The initial time offset configuration of the i covering grade time domain is：{Start_T1, Start_T2..., Start_Ti}；
The preamble code numbers of the i covering grade time domain are configured to：{Npreamble_T1, Npreamble_T2...,
Npreamble_Ti}；
Wherein, i is the natural number more than or equal to 1.
6. a kind of accidental access signal sending method of multi-sub-band system, which is characterized in that including：
UE is measured by RSRP, obtains itself covering grade；
Based on itself covering grade and the corresponding signal parameter configuration of preset signals multiplexing rule, selection itself covering
The corresponding broadcasting sub-band of grade either the corresponding preamble code of itself covering grade or it is described itself
The corresponding time domain of covering grade, and setting signal parameter generate preamble signals；
The preamble signals are sent using the random access channel of the uplink frame of a broadcasting sub-band.
7. method as claimed in claim 6, which is characterized in that when the random access of the uplink frame using a broadcasting sub-band
After channel sends the preamble Signal Fails, regenerated after improving a covering grade based on itself covering grade
Preamble signals are sent.
8. method as claimed in claim 6, which is characterized in that
When preset signals multiplexing rule is frequency division multiplexing, the regular corresponding signal parameter configuration of preset signals multiplexing
Including：
When preset signals multiplexing rule is frequency division multiplexing, M broadcasting sub-band is divided into i covering grade access
Band, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade access subband is configured to：{Nrep_F1, Nrep_F2..., Nrep_Fi}；
The preamble code numbers of the i covering grade access subband are configured to：{Npreamble_F1, Npreamble_
F2..., Npreamble_Fi}；
When preset signals multiplexing rule is code division multiplexing, the regular corresponding signal parameter configuration of preset signals multiplexing
Including：
When preset signals multiplexing rule is code division multiplexing, the code resource of each random access channel is divided into i and is covered
Lid grade code character, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade code character is configured to：{Nrep_C1, Nrep_C2..., Nrep_Ci}；
The PRACH period assignments of the i covering grade code character are：{Ncycle_C1,Ncycle_C2..., Ncycle_Ci}；
The preamble code numbers of the i covering grade code character are configured to：{Npreamble_C1, Npreamble_C2...,
Npreamble_Ci}；
When preset signals multiplexing rule is is time-multiplexed, the preset signals are multiplexed the corresponding signal parameter configuration of rule
Including：
When preset signals multiplexing rule is is time-multiplexed, the time-domain resource of each random access channel is divided into i
Covering grade time domain, the signal parameter configuration are as follows：
The PRACH number of resources of the i covering grade time domain is configured to：{Nrep_T1, Nrep_T2..., Nrep_Ti}；
The PRACH period assignments of the i covering grade time domain are：{Ncycle_T1,Ncycle_T2..., Ncycle_Ti}；
The initial time offset configuration of the i covering grade time domain is：{Start_T1, Start_T2..., Start_Ti}；
The preamble code numbers of the i covering grade time domain are configured to：{Npreamble_T1, Npreamble_T2...,
Npreamble_Ti}；
Wherein, i is the natural number more than or equal to 1.
9. a kind of accidental access signal sending device of multi-sub-band system, which is characterized in that including：
Covering grade configuration module, for configuring multiple covering grades for each cell in multi-sub-band system；And
Signal parameter configuration module, for being that different covering grades configures different signal ginsengs according to preset signals multiplexing rule
Number generates preamble signals and is sent so that UE is according to corresponding covering grade setting signal parameter；The preset signals
Being multiplexed rule is：Any one of frequency division multiplexing, code division multiplexing and time division multiplexing.
10. a kind of accidental access signal sending device of multi-sub-band system, which is characterized in that including：
Grade acquisition module is measured by RSRP for UE, obtains itself covering grade；
Signal generation module is matched for being based on itself covering grade and the corresponding signal parameter of preset signals multiplexing rule
It sets, selects the corresponding broadcasting sub-band of itself covering grade or itself covering grade one corresponding
Preamble codes or the corresponding time domain of itself covering grade, and setting signal parameter generate preamble letters
Number；And
Signal transmitting module, the random access channel for the uplink frame using a broadcasting sub-band send the preamble and believe
Number.
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