CN103298121B - A kind of terminal frequency point maps and collocation method - Google Patents
A kind of terminal frequency point maps and collocation method Download PDFInfo
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Abstract
The invention provides a kind of terminal frequency point to map and collocation method, the method comprises the steps: that A, terminal obtain the frequency of broadcast channel, receives broadcast message on the frequency of broadcast channel, selects time slot to send Msg1；After B, base station receive Msg1, from optional frequency, select a frequency, generate and send the Msg2 carrying selected frequency point information；C, the terminal mapping relations according to Msg1 and Msg2, obtain the running time-frequency resource of Msg2, receive Msg2 on this running time-frequency resource；D, terminal send Msg3 at the Msg2 frequency specified and receive Msg4.
Description
Technical field
The present invention relates to mobile communication technology field, particularly relate to a kind of terminal frequency point and map and collocation method.
Background technology
TD-LTE is the Long Term Evolution version of the third generation (3G) mobile communication standard TD-SCDMA, adopt the technology such as OFDM (OFDM), multiple-input and multiple-output (MIMO), make that systematic function has very big lifting (under 20MHz bandwidth, the descending 100Mbps of peak rate, up 50Mbps).TD-LTE230 system is the Wireless Broadband Communication Systems for the application of power communication private network adopting TD-LTE core technology development to go out.
TD-LTE230 system uses 230MHz frequency range.Current 230MHz frequency range is mainly used in data radio station and undertakes long-range data collection task, because the speed provided very low is only used for some simple communications applications, it is impossible to meet intelligent grid and the growing business demand of Sensor Network.According to the planning that national grid is following, it is desirable to find a kind of new broadband communications technologies, meet the business demand in its distribution automation, load management, power information collection, smart power grid user service, emergency first-aid repair, the big field of special area video monitoring six.
In order to provide the data transmission service of two-forty in 230MHz frequency range, OFDM (OFDM) is combined by applicant with carrier aggregation and frequency spectrum perception technology, provide a kind of low-power consumption, high spectrum utilization, the multi-business communication system flexibly of high reliability, the business need of power load monitoring system be can farthest meet, solid technological accumulation and Applied D emonstration provided for the planning of national grid next generation network simultaneously.
The frequency spectrum of State Grid Corporation of China 230 frequency range mandate is as it is shown in figure 1, be divided into 3 bunches, and first bunch comprises 15 frequencies, and second bunch comprises 10 frequencies, and the 3rd bunch comprises 15 frequencies, and each frequency is discrete spectrum.
Obtaining near 40 frequencies authorized in State Grid Corporation of China, it is understood that there may be the frequency in 230 traditional radio station, therefore traditional 230 radio station and TD-LTE230 system would be likely to occur the problem interfered.And in actual applications, it is also possible to there is the problem that system spectral resources is not enough.Therefore, after local networks are opened, it is necessary to according to spectrum occupancy, effective frequency points and frequency position are set.
Additionally, the mandate frequency of petroleum pipeline system is also at 230MHz, it is thus achieved that authorization number unknown (having relation with concrete province), the mandate frequency position of acquisition is also undetermined.If TD-LTE230 project is applied in petroleum pipeline system, then face the problem that frequency changes, it is necessary to reselect frequency position.
In prior art, mobile terminal is linked into a complete wireless communication system by Random Access, and its signalling interactive process includes 4 basic steps, as shown in Figure 2:
Step 201:UE sends random access lead code (preamble) (message 1 or Msg1) to base station (eNB) on RACH (RACH)；
RA-RNTI, PARCH take No. slot and are randomly assigned by the MAC layer of terminal sending side, when eNodeB receives, it is possible to directly know.It is then that terminal is known from base station transmission broadcast when cell searching that communicty preambel code bit moves (preambleshift).Physical layer uses the preamble sequence transmit power specified and fixing preamble sequence to be transmitted in the PRACH resource of instruction.
In order to reduce the collision probability of competition Stochastic accessing, each UE randomly chooses time-domain resource, frequency domain resource and preamble resource equiprobably in some cycles and launches competition random access lead code.The synchronization subband index of the PRACH resource of random access code is moved and transmitted to its configuration communicty preambel code bit on the middle and senior level, moved by communicty preambel code bit and indicate corresponding preamble resource, only need to randomly select PRACH resource on the synchronization subband that synchronization subband index is corresponding.
Step 202: the accidental access response (message 2 or Msg2) that MAC layer produces is transmitted, to UE, in base station on DSCH Downlink Shared Channel (DL-SCH).
Msg2 has the feature that
Tong Bu with Msg1 half (it is one or more TTI that accidental access response receives window)；
Do not support HARQ；
PDSCH channel (now PCFICH channel indication message is 1) is with RA-RNTI scrambling；
Message is carried Backoff, time advance information, initial uplink mandate, and distributes T-C-RNTI；
This downstream message can comprise a UE.
Step 203:UE transmits the schedule information (message 3 or Msg3) of uplink first on Uplink Shared Channel (UL-SCH).
Msg3 has the feature that
Tong Bu with Msg2 (receiving the next radio frame transmission of Msg2)；
Support HARQ；
Msg3 uses a radio frame transmission；
For being initially accessed: send, by CCCH, the RRC connection establishment request message that rrc layer produces；Carry NAS layer UEID, but do not carry NAS message；Rlc layer adopts TM transmission mode: not segmentation；
For RRC connection reconstruction process: send, by CCCH, the RRC connection reconstruction message that rrc layer produces；RLCTM pattern not segmentation；Do not carry any NAS message.
Step 204:eNB transmits descending competition resolution information (message 4 or Msg4) on DL-SCH.
Msg4 has the feature that
Adopt the settlement mechanism of competition resolution in advance (namely eNB is when solving competitive mode Stochastic accessing, it is not necessary to wait the response message of NAS)；
Need not be synchronize with Msg3；
Support HARQ；
Mark on PDSCH (now PCFICH channel indication message is 1) or PDCCH: during for being initially accessed with Radio Link Failure, with T-C-RNTI for mark；For the UE of RRC_CONNECTED state, with C-RNTI for mark；
Only detect that the UE of the competition resolution mark oneself sent in Msg3 can send HARQ feedback.
The flow process of terminal frequency point of the prior art configuration is as it is shown on figure 3, comprise the steps:
Step 301: terminal adjusts frequency to broadcast channel, receives broadcast.
Step 302: after terminal completion timing synchronizes, initiates accidental access signal, sends Msg1 message.
Step 303: the subband that up-downgoing is all idle, after receiving Msg1 message, is searched in base station, and by Msg2 message informing terminal.
Step 304: the terminal position according to access point, searches the frequency that Msg2 message maps, and then branches to corresponding frequency and receives Msg2 message.
Step 305: after in the frequency that terminal to base station is specified, sends Msg3, and receives Msg4, complete to be initially accessed.
Step 306: when terminal completes authentication startup RRC reconfiguration course, eNodeB provides frequency available information or frequency configuration information in reallocation message.
In current state's net system, the method for employing is: terminal is fixedly installed three broadcast frequencies in software, and needs to send Msg3, receive the frequency point number of Msg4 with 6 bit instructions in Msg2 message.And utilize RRC heavily to join, by current grant can 40 frequencies show with 40 Bit.
In traditional TD-LTE230 system, Msg2 mapping mode is as shown in Figure 4.UE selects to send accidental access signal on the sub-frame of uplink and UpPts of the subband receiving broadcast, one radio frames adds up to the time period of 4 Stochastic accessing, give a community for every section to use, every section has 16 windows (having 8 windows in big radius of society situation).The corresponding common sub-band of each window, namely the transmission window point of Stochastic accessing determines UE and accesses which community and which subband (receiving MSG2).
Accordingly, Msg2 corresponding subband allocation algorithm is as follows: for two bunches of 15 subbands, and two radio frames have 14 RA resources, just can map bunch 14 interior business subbands.For 10 subbands bunch, then be corresponding 9 common sub-band of 14 RA resources, now map according to rule.
Therefore, when current TD-LTE230 system is applied to other system, the problem of Msg2 is embodied as: 16 time slot points that Msg2 working frequency points accesses with terminal are that software binding associates, it is impossible to change.And when total frequency is less or during inter-frequency networking, base station provides terminal can tail off to the frequency receiving Msg2, terminal now cannot adapt to receive the situation of Msg2 frequency negligible amounts automatically.When available frequency is more, there will be the situation of frequency spectrum resource waste equally, a large amount of idle frequencies cannot be used for the reception of Msg2 information.
Petroleum system nets mandate wireless frequency configuration corresponding to TD-LTE230 system and inconsistent with state.Therefore when TD-LTE230 system is applied to petroleum system, it is necessary to the corresponding software of amendment and handling process.It addition, country's key special subjects wireless wide-area covers project, its radio frequency band is 400MHz, working frequency points also with existing State Grid Corporation of China inconsistent.
If maintaining current handling process, when TD-LTE230 system is applied to other system or different frequency range, terminal software is very big in follow-up middle modification amount, so needing to solve following problem:
When terminal receives Msg2 information, system assignment frequency position.Namely how terminal sends the time-frequency message of MSG1 and the configuration information of this community with base station according to terminal, show that terminal receives the time-frequency location of Msg2 message.
Above-mentioned key point is the problem that wireless communication system must solve when migrating or be transplanted to another one wireless communication system.Otherwise, whole wireless communication system will sink into the state that cannot work.
Summary of the invention
The invention provides a kind of terminal frequency point to map and collocation method, it is possible to adapt to the difference of difference and the feedback information running time-frequency resource accessing running time-frequency resource, it is achieved the mapping of frequency and configuration.
The embodiment of the present invention provides a kind of terminal frequency point to map and collocation method, and the method comprises the steps:
A, terminal obtain the frequency of broadcast channel, receive broadcast message on the frequency of broadcast channel, select time slot to send Msg1；
After B, base station receive Msg1, from optional frequency, select a frequency, generate and send the Msg2 carrying selected frequency point information；
C, the terminal mapping relations according to Msg1 and Msg2, obtain the running time-frequency resource of Msg2, receive Msg2 on this running time-frequency resource；
D, terminal send Msg3 at the Msg2 frequency specified and receive Msg4.
Preferably, one configuration file is set in the terminal, this configuration file preserves current area can with frequency total length, be used for showing whether the whether occupied bitmap table of each frequency, frequency mark, frequency position, frequency spectrum allocation model, frequency are broadcast frequency and mapping relations；
Terminal described in step A obtains the frequency of broadcast channel: the frequency configuration of terminal read broadcast channel from configuration file.
It is preferred that terminal sends Msg1 at nth frame time slot in step A；
In step C, if terminal is contention access, receive Msg2 at N+2 frame slot；If terminal is non-contention access, receive Msg2 at N+3 frame slot.
Preferably, described configuration file includes following long number of bits according to Z: high order bit position is that Physical Random Access Channel PARCH accesses displacement number, which frequency intermediate bit position instruction UE is positioned at, and low bit position is the random access radio network temporary mark RA-RNTI of UE；
The running time-frequency resource that terminal described in step C obtains Msg2 according to the mapping relations of Msg1 and Msg2 includes:
C1, according to home base stations whether great Qu and whether identical networking, from configuration file, obtain actual available frequency count and MSG2 frame position quantity can be received, and map the data to the sequence number that Prime sequences is corresponding, find corresponding prime number p；
C2, by long number of bits according to Z divided by available frequency count correspondence prime number p, obtain a remainder N；This remainder N is multiplied by available frequency point quantity, then divided by this prime number p, and rounds up, and is the mapping frequency point number of access；
C3, will map frequency point number divided by after 2 with actual frequency point number one_to_one corresponding, obtain current MSG2 working frequency points number.
It is preferred that when community, UE place is great Qu, described long number of bits is 3 bits according to the high order bit position of Z；When the cabin at UE place is Small Section Mode, described long number of bits is 4 bits according to the high order bit position of Z.
It is preferred that described long number of bits is 2 bits according to the intermediate bit position of Z, and/or, described long number of bits is 7 bits according to the low bit position of Z.
It is preferred that the mapping relations that terminal described in step C is according to Msg1 and Msg2, the running time-frequency resource obtaining Msg2 includes:
The on-position of MSG1 is numbered by terminal, the access slot number of any one Physical Random Access Channel, is indexed sequence as follows:
Prach_index=Group_index+Group_No*slot_index, wherein, Group_No represents current bunch or frequency group quantity, and Group_index represents current bunch number, and slot_index represents the timeslot number being currently accessed；
Contention access running time-frequency resource and non-competing running time-frequency resource are configured on each frequency: non-competing running time-frequency resource is mapped to available frequency in mode one to one；Contention access time-frequency resource maps is to remaining available frequency.
It is preferred that described contention access time-frequency resource maps includes to remaining available frequency:
Judge that whether system PRACH total quantity is less than or equal to available running time-frequency resource, if so,
The frequency position of Msg2 is determined according to formula MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M；Wherein, MSG2_Position is the frequency position of Msg2, and M is contention access frequency quantity, and Prach_index is the numbering of Physical Random Access Channel, and SFN is System Frame Number of eating dishes without rice or wine；
Otherwise, judge whether (Prach_index) >=2*M+ (SFNmod2*M) or (Prach_index) < (SFNmod2*M), if, cancel this Msg2 to send, otherwise, the frequency position of Msg2 is determined according to formula MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M.
It is preferred that the method farther includes:
Terminal, according to configuration file, obtains current area and can use frequency total length, thus determining the frequency position layout length that will receive；
Base station, for this community industry available frequency point situation configuration, sends frequency bitmap table；
Terminal is according to the frequency bitmap table received, comparative arrangement file, thus obtaining available frequency configuration.
As can be seen from the above technical solutions, Msg2 is determined by mapping relations, can adapt to the difference of difference and feedback information (Msg2) running time-frequency resource accessing running time-frequency resource, realize method simple and flexible, can adapt to different operative scenario, when solving communication system change operating frequency and working frequency points, it is necessary to the problem updating software and various setting.The present invention program principle is simple and reliable, it is easy to accomplish, and save interface-free resources to greatest extent, and existing access system flow is changed only small, decrease software modification amount.
Accompanying drawing explanation
Fig. 1 is the spectrum diagram of State Grid Corporation of China 230 frequency range mandate；
Fig. 2 is that mobile terminal is linked into the Signalling exchange schematic diagram of wireless communication system by random access procedure；
Fig. 3 is the schematic flow sheet of terminal frequency point of the prior art configuration；
Fig. 4 is the Msg2 mapping mode schematic diagram in traditional TD-LTE230 system；
The frequency point setting schematic flow sheet that Fig. 5 provides for the embodiment of the present invention；
Fig. 6 is the Msg2 frequency mapping relations schematic diagram in the embodiment of the present invention；
Fig. 7 is the concrete form schematic diagram of the on-position numbering of embodiment two；
Fig. 8 is the schematic diagram that contention access running time-frequency resource and the non-competing running time-frequency resource of embodiment two carries out configuring on each frequency；
Fig. 9 is the mapping relations schematic diagram of Msg1 to the Msg2 of embodiment two；
Figure 10 is that in the embodiment of the present invention, terminal updates currently available frequency schematic diagram.
Detailed description of the invention
The present invention proposes a kind of terminal frequency point and maps and collocation method, and its core concept is: the mapping relations of same Msg1 to Msg2 frequency are observed in terminal and base station, determine the frequency of Msg2 according to these mapping relations, and receive Msg2 on this frequency after terminal reception Msg1.
The method comprises the steps:
A, terminal obtain the frequency of broadcast channel, receive broadcast message on the frequency of broadcast channel, select time slot to send Msg1；
After B, base station receive Msg1, from optional frequency, select a frequency, generate and send the Msg2 carrying selected frequency point information；
C, the terminal mapping relations according to Msg1 and Msg2, obtain the running time-frequency resource of Msg2, receive Msg2 on this running time-frequency resource；
D, terminal send Msg3 at the Msg2 frequency specified and receive Msg4.
For making the know-why of technical solution of the present invention, advantage and technique effect clearly, below by way of specific embodiment, the present invention program is described in detail.
Net in TD-LTE230 system in existing state, there is an independent configuration file for representing ID and simple configuration information；, all there is respective profiles, be used for preserving user configuration information, be usually present in SIM in other wireless communication system such as GSM/CDMA/LTE etc..This configuration file is extended by the inventive method, for different industries and different geographical, by information such as increase industry distribution information, useful frequency position and standby frequency positions, it is ensured that final air-interface efficiency is the highest.
One configuration file is set in the terminal, this configuration file preserves following information: current area can with frequency total length, be used for showing the whether occupied bitmap table (bitmap) of each frequency, frequency mark, frequency position (representing with frequency values), frequency spectrum allocation model, frequency type (whether being broadcast frequency), mapping relations.Mapping relations can for comprising broadcast location, timeslot number, the HASH function of available frequency point quantity or other kinds of mapping relations.The length of Bitmap can use frequency sum consistent with current area.Such as, current configuration file represents that available frequency adds up to 60, then the length of BITMAP is 60bit.Except adopting the mode of configuration file, it would however also be possible to employ other modes make terminal know mapping relations and other information, for instance the above-mentioned information of transmitting signaling downwards can be passed through in base station.
The frequency point setting flow process that the embodiment of the present invention provides is as it is shown in figure 5, comprise the steps:
Step 501: terminal is the frequency configuration of read broadcast channel from configuration file (such as user file or SIM storage file etc.), receives broadcast message, select time slot to send Msg1 on corresponding frequency.
Step 502: base station generates and sends Msg2, specifies the 6bit frequency (possessing 64 optional frequencies) represented in Msg2, and frequency agreement is included in configuration file.
Step 503: terminal obtains mapping relations by configuration file, obtains the running time-frequency resource of Msg2, receives Msg2 on this running time-frequency resource.
Step 504: terminal sends Msg3 at the Msg2 frequency specified, receives Msg4.
Msg2 frequency mapping relations in the embodiment of the present invention are as shown in Figure 6.In nth frame, this community sends Msg1.At N+1 frame free timeslot, count out according to available frequency, broadcast frequency point number, obtained the running time-frequency resource of Msg2 by frequency time slot mapping function；If contention access, receive Msg2 at N+2 frame slot；If non-competing access, receive Msg2 at N+3 frame slot.
The input variable of frequency time slot mapping function therein includes: 1, PRACH access slot number.2, currently available frequency number.3, the broadcast frequency point number being currently accessed.4, the RA-RNTI of current UE.5, inter-frequency networking pattern.6, whether it is great Qu mode of operation.Output is then UE at which available frequency at which frame reception MSG2 or applies for unsuccessfully.
Owing to the core of frequency time slot mapping function is to ensure that input can be mapped in output uniformly.Generally output frequency number is less, and it is relatively big to input change space, therefore there is many-to-one mapping.The method that generally can adopt HASH function or hand weaving rule solves above-mentioned mapping problems.Hereinafter the specific implementation of frequency time slot mapping function is illustrated.
Embodiment one: realize frequency time slot mapping by Hash function.
Apply this embodiment to need to meet following precondition:
1, when home base stations is configured to inter-frequency networking, it is inter-frequency networking by the networking mode of broadcast or each terminal local base station of system message update (SIB, systeminformationBlock) information notification attachment.During starting up of terminal work, it is defaulted as identical networking mode of operation.
Terminal can according to the frequency of work at present, it is determined that the frequency point number of which kind of frequency spectrum allocation model currently employed and use.The corresponding relation of frequency mark and frequency spectrum allocation model is saved in configuration file.Owing to adopting Physical Cell Identifier (PCI, PhysicalCellIdentifier) frequency point allocation is carried out divided by the mode of 3 remainders, so by master sync signal (PSS, primarysynchronizationsignal), auxiliary synchronous signal (SSS, secondarysynchronizationsignal) demodulation, current PCI value can be obtained, and PCI value is able to confirm which group frequency current area chooses.Thus, terminal can obtain the working frequency points number that this community is legal and the spectrum position of correspondence.
2, when home base stations is configured to great Qu, it is configured to great Qu system by broadcasting each terminal local base station of signals base attachment.When terminal sends MSG1 by this validation of information, it is possible to allow the number of timeslots sent.Usual Small Section Mode allows the number of timeslots sent to be 15, and great Qu is then 7.
Considering to realize workload, configuration file can realize this Hash function in the following way:
1, PARCH is accessed No. shift as high order bit position (when for great Qu, select 3Bit, during for Small Section Mode select 4Bit, namely No. PrachSlot)
2, which frequency UE is positioned at as intermediate bit position (for 2Bit, represent which bunch)
3, using the Radio Network Temporary Identifier (RA-RNTI) of UE as low-order bit position (being 7Bit at present)
This three constitutes a long number of bits according to Z.
Embodiment one provide utilize Hash function to determine the process of frequency is as follows:
According to home base stations whether great Qu and whether identical networking, from configuration file, obtain actual available frequency count and MSG2 frame position quantity (being currently 2) can be received, and map the data to the sequence number that Prime sequences is corresponding, find the prime number p of correspondence.Table 1 lists sequence number 2 in Prime sequences and arrives the prime number of sequence number 10 correspondence.
| Sequence number | Prime number value |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 11 |
| 7 | 13 |
| 8 | 17 |
| 9 | 19 |
| 10 | 23 |
| …… | …… |
Table 1
Described table of primes is used for obtaining random seed.In list, p is sequence number is the prime number of m, for instance during m=40 (namely available frequency and MSG2 frame position amount total are 40), prime number is 173, and when 19, prime number is 67；
By long Bit number Z, the prime number p of correspondence of counting divided by available frequency, a remainder N will be obtained.This remainder is multiplied by available frequency point quantity, then divided by this prime number, and rounds up, and is the mapping frequency point number of access.
What obtained by said method is map frequency point number, for instance during inter-frequency networking, is currently 13 available work frequencies, supports that 2 frames receive, then map frequency point number be 0～25 (because present frame and next frame can with).And this mapping frequency point number is converted to actual frequency point number method is as follows:
1, according to current collocation method (such as with frequency/alien frequencies, MSG1 access frequency point number can be passed through and obtain), the frequency of each real work is obtained.(corresponding 40 frequencies or 13 frequency correspondence real work frequencies can be obtained).
2, will map frequency point number divided by after 2 with actual frequency point number one_to_one corresponding, obtain current MSG2 working frequency points number, and after mapping frequency point number mould 2, then correspondence is MSG2 be present frame or next frame reception.
Pass through said method, it is possible to ensure that each frequency can use uniformly, it is ensured that the fairness of channel used.
Embodiment two: realize frequency time slot mapping by System Frame Number of eating dishes without rice or wine (SFN) reflection method
Application Example two needs to meet following hypotheses:
1, before sending MSG1 message, UE terminal can obtain current System Frame Number of eating dishes without rice or wine (SFN), and length is 16bit.
2, UE can clearly be known and there is currently several bunches of frequencies (i.e. frequency group quantity).
By SFN reflection method, what embodiment two provided determines that the process of frequency is as follows:
First, the on-position of MSG1 is numbered by terminal.
The concrete form of on-position numbering may refer to Fig. 7.Wherein Group_No represents current bunch or frequency group quantity, for instance currently have three bunches, then Group_No=3.Group_index then represents current bunch number, for instance be currently the 0th bunch, then this value is 0.Slot_No then represents time slot (slot) total quantity of available Prach, and great Qu is 7, and community is 14.Any one Prach accesses No. Slot, will be indexed sequence as follows: Prach_index=Group_index+Group_No*slot_index.Slot_index represents No. slot be currently accessed.
It follows that contention access running time-frequency resource and non-competing running time-frequency resource are configured on each frequency.
As shown in Figure 8, it is assumed that contention access frequency quantity is M (such as LTE230 project is under normal circumstances, M=37 in identical networking situation, M=13 in inter-frequency networking situation), and Msg2 can receive at the 2nd frame after Msg1 sends and the 3rd frame.Therefore, the access frequency point number consecutively receiving Msg2 to the 1st time is 0～M-1, and to the 2nd time, then number consecutively is M～2*M-1.For non-competing access situation, it is assumed that possess K frequency resource, according to the 1st time, this resource is received frequency resource settings is 0～K-1, and receiving frequency resource settings for the 2nd time is K～2*K-1.
By the mapping that the process setting of MSG1 to MSG2 is following, specifically as shown in Figure 9:
For contention access resource:
MSG1 frequency position (0～Group_No*slot_No-1)-" 0～2*M-1 running time-frequency resource.
For non-competing access-in resource:
MSG1 frequency position (0～Group_No*Nslot_No-1)-" 0～2*K-1 running time-frequency resource.
The current non-competing resource of TD-LTE230 default is mapping mode, corresponding available frequency position, each MSG1 frequency position one by one.During system design, being supplied to non-competing resource by preferentially separating available frequency, remaining available frequency is then used for competing frequency.
For competitive resource, presently, there are three kinds of situations:
1, Group_No*Slot_No < 2*M (namely system PRACH total quantity is less than available running time-frequency resource), now system possesses enough MSG2 frequency resources, is used for distributing.Now obtain as follows
MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M
Introduce SFN purpose be to ensure that each Prach access slot can Stochastic accessing to whole available frequency, it is ensured that access frequency point interference randomization.
2, Group_No*Slot_No=2*M (i.e. system PRACH total quantity and available running time-frequency resource one_to_one corresponding).Now, the running time-frequency resource that MSG2 receives realizes as follows:
MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M
SFN is option in expression formula.
3, Group_No*Slot_No > 2*M (namely system PRACH total quantity is too much, and part PRACH accesses actual invalid).MSG2 now receives video resource and realizes as follows:
If (Prach_index) >=2*M+ (SFNmod2*M) or (Prach_index) < (SFNmod2*M),
This random access information is invalid, cancels and sending.
Else
MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M
SFN is option in expression formula.
Citing:
If current Group_No=3, slot_No=14, and M=10, then necessarily there is the situation that PRACH quantity is too much, now suppose SFN=0；
Then when prach_index meets be more than or equal to 0 or less than 20, it is possible to access, otherwise cancel this and launch.And when above-mentioned condition meets, Msg2_position is equivalent to Prach_index.
Due to MSG2_Postion and real work frequency and working time slot one_to_one corresponding, circular is referred to above describe.Therefore base station and terminal can accurately obtain the Time-Frequency Information of MSG2.
When terminal can change with frequency, it is necessary to notify that terminal updates currently available frequency by RRC reconstitution process.Idiographic flow as shown in Figure 10, comprises the steps:
Step 1001: terminal, according to configuration file, obtains current area and can use frequency total length, thus determining the frequency position layout length that will receive.What configuration file comprised is general information, for instance regional industry all available frequency.
Step 1002: base station, for this community industry available frequency point situation configuration, sends frequency bitmap table.
Step 1003: terminal is according to the frequency bitmap table received, comparative arrangement file, thus obtaining available frequency configuration.
It is emphasized that and should obtain all possible situation, and input configuration file, it is ensured that increase extra available frequency in actual use.If add extra frequency temporarily, then must flow through the BitMap sending 480 length and solve.Such as, current configuration file represents that available frequency adds up to 60, and indicates frequency point number in configuration file.When RRC heavily timing, sending the BITMAP information that length is 60, this BITMAP correspondence puts the frequency point number of 1, can use frequency for present terminal.Terminal is thus obtaining definite frequency position.
Compared to existing technology, the present invention program has the advantages that
1, can adapt to the difference of difference and feedback information (MSG2) running time-frequency resource accessing running time-frequency resource, and original method is fixed correspondence, it is impossible to change flexibly.
2, method simple and flexible is realized, it is possible to adapt to different operative scenario, when solving communication system change operating frequency and working frequency points, it is necessary to the problem updating software and various setting.
3, principle is simple and reliable, it is easy to accomplish, and save interface-free resources to greatest extent.
4, existing access system flow is changed only small, decrease software modification amount.
Above example is only for TD-LTE230 systems technology, based on same or similar inventive concept, the program can be applied equally to the communication system of other wireless technologys, including mobile communication system, for instance Long Term Evolution project (LTE), global system for mobile communications GSM, CDMA the trunked communication system such as cell mobile communication systems and Tetra, IDEN, PDT.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within the scope of protection of the invention.
Claims (6)
1. a terminal frequency point maps and collocation method, it is characterized in that, one configuration file is set in the terminal, this configuration file preserves current area can with frequency total length, be used for showing whether the whether occupied bitmap table of each frequency, frequency mark, frequency position, frequency spectrum allocation model, frequency are broadcast frequency and mapping relations；Described configuration file includes following long number of bits according to Z: high order bit position is that Physical Random Access Channel PARCH accesses displacement number, and which frequency intermediate bit position instruction UE is positioned at, and low bit position is the random access radio network temporary mark RA-RNTI of UE；The method comprises the steps:
The frequency configuration of A, terminal read broadcast channel from configuration file, receives broadcast message on the frequency of broadcast channel, selects time slot to send Msg1；
After B, base station receive Msg1, from optional frequency, select a frequency, generate and send the Msg2 carrying selected frequency point information；
C1, according to home base stations whether great Qu and whether identical networking, from configuration file, obtain actual available frequency count and Msg2 frame position quantity can be received, and map the data to the sequence number that Prime sequences is corresponding, find corresponding prime number p；
C2, by long number of bits according to Z divided by available frequency count correspondence prime number p, obtain a remainder N；This remainder N is multiplied by available frequency point quantity, then divided by this prime number p, and rounds up, and is the mapping frequency point number of access；
C3, will map frequency point number divided by after 2 with actual frequency point number one_to_one corresponding, obtain current Msg2 working frequency points number, reception Msg2 in current Msg2 working frequency points number；
D, terminal send Msg3 at the Msg2 frequency specified and receive Msg4.
2. method according to claim 1, it is characterised in that in step A, terminal sends Msg1 at nth frame time slot；
In step C, if terminal is contention access, receive Msg2 at N+2 frame slot；If terminal is non-contention access, receive Msg2 at N+3 frame slot.
3. method according to claim 1, it is characterised in that when community, UE place is great Qu, described long number of bits is 3 bits according to the high order bit position of Z；When the community at UE place is Small Section Mode, described long number of bits is 4 bits according to the high order bit position of Z.
4. method according to claim 1, it is characterised in that described long number of bits is 2 bits according to the intermediate bit position of Z, and/or, described long number of bits is 7 bits according to the low bit position of Z.
5. a terminal frequency point maps and collocation method, it is characterized in that, one configuration file is set in the terminal, this configuration file preserves current area can with frequency total length, be used for showing whether the whether occupied bitmap table of each frequency, frequency mark, frequency position, frequency spectrum allocation model, frequency are broadcast frequency and mapping relations；The method comprises the steps:
The frequency configuration of A, terminal read broadcast channel from configuration file, receives broadcast message on the frequency of broadcast channel, selects time slot to send Msg1；
After B, base station receive Msg1, from optional frequency, select a frequency, generate and send the Msg2 carrying selected frequency point information；
The on-position of Msg1 is numbered by C, terminal, the access slot number of any one Physical Random Access Channel, is indexed sequence as follows:
Prach_index=Group_index+Group_No*slot_index, wherein, Group_No represents current bunch or frequency group quantity, and Group_index represents current bunch number, and slot_index represents the timeslot number being currently accessed；
Contention access running time-frequency resource and non-competing running time-frequency resource are configured on each frequency: non-competing running time-frequency resource is mapped to available frequency in mode one to one；
Judge that whether system PRACH total quantity is less than or equal to available running time-frequency resource, if so,
The frequency position of Msg2 is determined according to formula MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M；Wherein, MSG2_Position is the frequency position of Msg2, and M is contention access frequency quantity, and Prach_index is the numbering of Physical Random Access Channel, and SFN is System Frame Number of eating dishes without rice or wine；
Otherwise, judge whether (Prach_index) >=2*M+ (SFNmod2*M) or (Prach_index) < (SFNmod2*M), if, cancel this Msg2 to send, otherwise, the frequency position of Msg2 is determined according to formula MSG2_Position=(Prach_index+ (SFNmod2*M)) Mod2*M；
Msg2 is received in the frequency position of described Msg2；
D, terminal send Msg3 at the Msg2 frequency specified and receive Msg4.
6. the method according to any one of claim 1 to 5, it is characterised in that the method farther includes:
Terminal, according to configuration file, obtains current area and can use frequency total length, thus determining the frequency position layout length that will receive；
Base station, for this community industry available frequency point situation configuration, sends frequency bitmap table；
Terminal is according to the frequency bitmap table received, comparative arrangement file, thus obtaining available frequency configuration.
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| ES2707723T3 (en) * | 2013-12-17 | 2019-04-04 | Huawei Tech Co Ltd | Apparatus and method of determining uplink data transmission |
| CN106612552A (en) * | 2015-10-23 | 2017-05-03 | 普天信息技术有限公司 | Cell frequency point allocation device in communication system |
| KR102622879B1 (en) * | 2016-02-03 | 2024-01-09 | 엘지전자 주식회사 | Method and Apparatus for Transmitting and Receiving Narrow Band Synchronization Signals |
| CN107277897A (en) * | 2016-04-07 | 2017-10-20 | 中兴通讯股份有限公司 | RA-RNTI collocation method and device |
| CN106385708B (en) * | 2016-09-13 | 2020-05-12 | 哈尔滨海能达科技有限公司 | Data transmission method and wireless link machine |
| CN108810905B (en) * | 2017-05-04 | 2023-10-24 | 华为技术有限公司 | Method and device for transmitting uplink channel and method and device for transmitting downlink channel |
| CN109041228B (en) * | 2017-06-12 | 2021-03-12 | 维沃移动通信有限公司 | Information transmission method, base station, mobile terminal, and computer-readable storage medium |
| CN109275190B (en) * | 2017-07-17 | 2021-10-26 | 华为技术有限公司 | Communication method and device |
| CN110190873B (en) * | 2019-05-30 | 2022-04-08 | 磐基技术有限公司 | Wired communication method supporting multiple users |
| CN111986766B (en) * | 2020-09-04 | 2024-06-18 | 首都儿科研究所附属儿童医院 | Community medical big data acquisition method and system |
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| EP2099248A2 (en) * | 2008-03-03 | 2009-09-09 | Lg Electronics Inc. | Method for resolving collision of uplink signals |
| CN101827450A (en) * | 2009-03-04 | 2010-09-08 | 华为技术有限公司 | Random access method, device and system |
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| CN101827450A (en) * | 2009-03-04 | 2010-09-08 | 华为技术有限公司 | Random access method, device and system |
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