CN103298121A

CN103298121A - Terminal frequency point mapping and configuring method

Info

Publication number: CN103298121A
Application number: CN2012100542858A
Authority: CN
Inventors: 刘建明; 陶雄强; 李祥珍; 邢益海; 闫淑辉; 胡炜; 徐宏; 祝锋; 邓晓晖; 李庆华; 易三军
Original assignee: Potevio Institute of Technology Co Ltd
Current assignee: Potevio Information Technology Co Ltd
Priority date: 2012-03-02
Filing date: 2012-03-02
Publication date: 2013-09-11
Anticipated expiration: 2032-03-02
Also published as: CN103298121B

Abstract

The invention provides a terminal frequency point mapping and configuring method which includes the following steps that a terminal acquires frequency points of a broadcast channel, receives broadcast information at the frequency points of the broadcast channel, and selects a time slot to send Msg1; after receiving the Msg1, a base station selects a frequency point from the selectable frequency points, and generates and sends Msg2 which carries the selected frequency point information; the terminal obtains time frequency resources of the Msg2 according to the mapping relationship of the Msg1 and the Msg2 and receives the Msg2 on the time frequency resources; the terminal sends Msg3 and receives Msg4 at the assigned frequency point of the Msg2.

Description

A kind of terminal frequency mapping and collocation method

Technical field

The present invention relates to the mobile communication technology field, relate in particular to a kind of terminal frequency mapping and collocation method.

Background technology

TD-LTE is the Long Term Evolution version of the third generation (3G) mobile communication standard TD-SCDMA, adopt OFDM (OFDM), multiple-input and multiple-output technology such as (MIMO), making has very big lifting (under the 20MHz bandwidth, the descending 100Mbps of peak rate, up 50Mbps) on the systematic function.The TD-LTE230 system is the Wireless Broadband Communication Systems at the application of power communication private network that adopts the TD-LTE core technology development to go out.

The TD-LTE230 system uses the 230MHz frequency range.At present the 230MHz frequency range is mainly used in data radio station and bears long-range data collection task, can only be used for some simple communications applications because the speed that provides is very low, can't satisfy intelligent grid and the growing business demand of sensing net.According to the national grid planning in future, require to seek a kind of new broadband connections technology, satisfy the business demand in its distribution automation, load management, power information collection, intelligent grid user service, emergency first-aid repair, special area video monitoring six big fields.

For the data transmission service of two-forty is provided in the 230MHz frequency range, the applicant combines OFDM (OFDM) with carrier aggregation and frequency spectrum perception technology, a kind of low-power consumption is provided, high spectrum utilization, the multi-business communication system flexibly of high reliability, can farthest satisfy the business need of power load monitoring system, solid technological accumulation is provided and use demonstration for the planning of national grid next generation network simultaneously.

The frequency spectrum of State Grid Corporation of China's 230 frequency range mandates as shown in Figure 1, being divided into is 3 bunches, first bunch comprises 15 frequencies, second bunch comprises 10 frequencies, the 3rd bunch comprises 15 frequencies, each frequency is discrete spectrum.

Near 40 frequencies that State Grid Corporation of China obtains the authorization, may there be the frequency in 230 traditional radio station, therefore may there be the problem of phase mutual interference in traditional 230 radio station and TD-LTE230 system.And in actual applications, also may there be the problem of system spectral resources deficiency.Therefore after local networks are opened, need take situation according to frequency spectrum, set effective frequency points and frequency position.

In addition, the mandate frequency of petroleum pipeline system is also at 230MHz, the number the unknown of obtaining the authorization (relation being arranged with concrete province), and the mandate frequency position that obtains is also undetermined.If the TD-LTE230 project in the petroleum pipeline system applies, then faces the problem that frequency changes, need reselect the frequency position.

In the prior art, portable terminal is linked into a complete wireless communication system by access way at random, and its signalling interactive process comprises 4 basic steps, as shown in Figure 2:

Step 201:UE goes up (eNB) transmission random access lead code (preamble) (message 1 or Msg1) to the base station in Random Access Channel (RACH);

RA-RNTI, PARCH take slot number and are specified at random by the MAC floor of terminal transmitter side, when eNodeB receives, can directly know.Communicty preambel sign indicating number displacement (preamble shift) then is that terminal is known from base station transmission broadcast when Cell searching.Physical layer uses the preamble sequence transmitted power of appointment and fixing preamble sequence to transmit in the PRACH resource of indication.

In order to reduce to compete the collision probability that inserts at random, each UE selects time-domain resource equiprobably at random in some cycles, frequency domain resource and lead code resource emission competition random access lead code.The synchronous subband index of the PRACH resource of its allocating cell lead code on the middle and senior level displacement and transmission random access code, indicate corresponding lead code resource by the displacement of communicty preambel sign indicating number, only need on the synchronous subband of synchronous subband index correspondence, picked at random PRACH resource get final product.

Step 202: the accidental access response (message 2 or Msg2) that produces to UE transmission MAC layer is gone up in the base station at DSCH Downlink Shared Channel (DL-SCH).

Msg2 has following feature:

With Msg1 half synchronous (the accidental access response receiver window is one or more TTI);

Do not support HARQ;

PDSCH channel (this moment, PCFICH channel Indication message was 1) is with the RA-RNTI scrambling;

Carry Backoff in the message, the time shifts to an earlier date information, initial uplink mandate, and distribution T-C-RNTI;

In this downstream message, can comprise a UE.

Step 203:UE transmits the schedule information (message 3 or Msg3) of uplink first at Uplink Shared Channel (UL-SCH).

Msg3 has following feature:

With Msg2 synchronous (receiving the next radio frame transmission of Msg2);

Support HARQ;

Msg3 uses a radio frame transmission;

For initial access: send RRC that rrc layer produces by CCCH and connect and set up request message; Carry NAS layer UE ID, but do not carry NAS message; Rlc layer adopts the TM transmission mode: not segmentation;

For RRC connection reconstruction process: send the RRC connection reconstruction message that rrc layer produces by CCCH; The not segmentation of RLC TM pattern; Do not carry any NAS message.

Step 204:eNB is in the descending competition resolution of DL-SCH transmission information (message 4 or Msg4).

Msg4 has following feature:

Adopt the settlement mechanism of competition resolution in advance (be eNB when solving competitive mode and insert at random, do not need to wait for the response message of NAS);

Do not need with Msg3 synchronous;

Support HARQ;

Sign on PDSCH (this moment, PCFICH channel Indication message was 1) or PDCCH: for the situation of initial access and Radio Link Failure, be sign with T-C-RNTI; For the UE of RRC_CONNECTED state, be sign with C-RNTI;

The UE that only detects the own competition resolution sign that sends in Msg3 can send the HARQ feedback.

The flow process of terminal frequency configuration of the prior art comprises the steps: as shown in Figure 3

Step 301: terminal is adjusted frequency to broadcast channel, receives broadcast.

Step 302: after terminal is finished timing synchronously, initiate accidental access signal, send Msg1 message.

Step 303: the equal idle subband of up-downgoing is searched in the base station after receiving Msg1 message, and by Msg2 message informing terminal.

Step 304: terminal is searched the frequency of Msg2 message maps according to the position of access point, jumps to corresponding frequency then and receives Msg2 message.

Step 305: after on the terminal to base station specified frequency, send Msg3, and receive Msg4, finish initial access.

Step 306: when terminal was finished authentication startup RRC reconfiguration course, eNodeB provided frequency available information or frequency configuration information in reallocation message.

In current state net system, the method for employing is: terminal fixedly installs three broadcasting frequencies in software, and the frequency point number that needs to send Msg3, receives Msg4 with 6 bit indications in Msg2 message.And utilizing the RRC reprovision, 40 frequencies that current mandate is available show with 40 Bit.

In traditional TD-LTE230 system, the Msg2 mapping mode as shown in Figure 4.UE is chosen in the sub-frame of uplink of the subband that receives broadcasting and UpPts and goes up and send accidental access signal, adds up to 4 time periods of inserting at random on the radio frames, gives a residential quarter for every section and uses, and 16 windows (under the big radius of society situation 8 windows being arranged) is arranged in every section.The corresponding common subband of each window, just the transmission window point that inserts has at random determined UE to insert which residential quarter and which subband (receiving MSG2).

Accordingly, Msg2 corresponding subband allocation algorithm is as follows: for two bunches of 15 subbands, two radio frames have 14 RA resources, 14 professional subbands in just in time can having shone upon bunch.For 10 subbands bunch, then be corresponding 9 the common subbands of 14 RA resources, shine upon according to rule this moment.

Therefore, current TD-LTE230 system applies is when other system, and the problem of Msg2 is embodied as: the Msg2 working frequency points is that software binding is related with 16 time slot points that terminal inserts, and can't change.And when total frequency during less or inter-frequency networking, the base station provides terminal can tail off to the frequency that receives Msg2, and terminal can't adapt to the situation that receives Msg2 frequency negligible amounts this moment automatically.When available frequency more for a long time, the situation of frequency spectrum resource waste can appear equally, a large amount of idle frequencies can not be used for the reception of Msg2 information.

The wireless frequency configuration of the mandate that petroleum system is corresponding with state net TD-LTE230 system is also inconsistent.Therefore the TD-LTE230 system applies needs to revise corresponding software and handling process when petroleum system.In addition, national great special project---wireless wide-area covers project, and its radio frequency band is 400MHz, and working frequency points is also also inconsistent with existing State Grid Corporation of China.

If keep current handling process, the TD-LTE230 system applies is when other system or different frequency range, and terminal software modification amount in follow-up is very big, so need address the problem:

When terminal receives Msg2 information, the working frequency points position of system assignment.Be how terminal and base station send the time-frequency message of MSG1 and the configuration information of this residential quarter according to terminal, draw the time-frequency position that terminal receives Msg2 message.

Above-mentioned key point is the migration of wireless communication system or the problem that must solve when being transplanted to the another one wireless communication system.Otherwise entire wireless communication system will be absorbed in the state that can't work.

Summary of the invention

The invention provides the mapping of a kind of terminal frequency and collocation method, can adapt to the difference that inserts running time-frequency resource and the difference of feedback information running time-frequency resource, mapping and the configuration of realization frequency.

The embodiment of the invention provides a kind of terminal frequency mapping and collocation method, and this method comprises the steps:

A, terminal are obtained the frequency of broadcast channel, and receiving broadcasting information 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 that carries selected frequency point information;

C, terminal obtain the running time-frequency resource of Msg2 according to the mapping relations of Msg1 and Msg2, receive Msg2 at this running time-frequency resource;

D, terminal send Msg3 and receive Msg4 at the frequency of Msg2 appointment.

Preferably, one configuration file is set in terminal, and preserving current area in this configuration file can be with the frequency total length, be used for showing whether whether occupied bitmap table, frequency sign, frequency position, spectrum allocation may pattern, frequency are to broadcast frequency and mapping relations to each frequency;

The frequency that the described terminal of steps A is obtained broadcast channel is: terminal reads the frequency configuration of broadcast channel from configuration file.

Preferably, terminal sends Msg1 at the N frame slot in the steps A;

Among the step C, insert if terminal is competition, receive Msg2 at the N+2 frame slot; If terminal is non-competing access, receive Msg2 at the N+3 frame slot.

Preferably, comprise in the described configuration file that following long number of bits is according to Z: displacement number is inserted for Physical Random Access Channel PARCH in the high order bit position, which frequency intermediate bit position indication UE is positioned at, and low bit is the random access radio network temporary mark RA-RNTI of UE;

The described terminal of step C comprises according to the running time-frequency resource that the mapping relations of Msg1 and Msg2 obtain Msg2:

C1, according to home base stations whether Da Qu and identical networking whether, from configuration file, obtain actual available frequency number and can receive MSG2 frame position quantity, and these data are mapped to prime number sequence corresponding sequence number, find corresponding prime number p;

C2, will grow number of bits and count the prime number p of correspondence according to Z divided by available frequency, obtain a remainder N; This remainder N multiply by available frequency quantity, then divided by this prime number p, and rounds up, and is the mapping frequency point number of access;

C3, will to shine upon frequency point number corresponding one by one with actual frequency point number divided by 2 backs, obtains current MSG2 working frequency points number.

Preferably, when residential quarter, UE place is Da Qu when processed, described long number of bits is 3 bits according to the high order bit position of Z; When the cabin at UE place is residential quarter when processed, described long number of bits is 4 bits according to the high order bit position of Z.

Preferably, 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 of Z.

Preferably, the described terminal of step C is according to the mapping relations of Msg1 and Msg2, and the running time-frequency resource that obtains Msg2 comprises:

Terminal is numbered the on-position of MSG1, and the access slot of any one Physical Random Access Channel number carries out index order in the following manner:

Prach_index=Group_index+Group_No*slot_index, wherein, Group_No represents current bunch or frequency group quantity, Group_index represents that slot_index represents the timeslot number of current access current bunch number;

To compete and insert running time-frequency resource and non-competing running time-frequency resource is configured at each frequency: non-competing running time-frequency resource will be mapped to available frequency in mode one to one; Competition inserts running time-frequency resource and is mapped to remaining available frequency.

Preferably, described competition inserts running time-frequency resource and is mapped to remaining available frequency and comprises:

Judge whether the PRACH of system total quantity is less than or equal to available running time-frequency resource, if,

Determine the frequency position of Msg2 according to formula MSG2_Position=(Prach_index+ (SFN mod 2*M)) Mod 2*M; Wherein, MSG2_Position is the frequency position of Msg2, and M is competition access frequency point quantity, and Prach_index is the numbering of Physical Random Access Channel, and SFN is for eating dishes without rice or wine System Frame Number;

Otherwise, judge whether (Prach_index) 〉=2*M+ (SFN mod 2*M) or (Prach_index)＜(SFN mod 2*M), if, cancelling this Msg2 sends, otherwise, determine the frequency position of Msg2 according to formula MSG2_Position=(Prach_index+ (SFN mod 2*M)) Mod 2*M.

Preferably, this method further comprises:

Terminal is obtained current area and can be used the frequency total length according to configuration file, thus the frequency bitmap table length that decision will receive;

The base station can send the frequency bitmap table with the configuration of frequency situation at this residential quarter industry;

Terminal is according to the frequency bitmap table that receives, and the comparative arrangement file disposes thereby obtain available frequency.

As can be seen from the above technical solutions, determine Msg2 by mapping relations, can adapt to the difference that inserts running time-frequency resource and the difference of feedback information (Msg2) running time-frequency resource, the implementation method simple and flexible, can adapt to different operative scenario, when having solved communication system change operating frequency and working frequency points, need the problem of update software and various settings.The present invention program's principle is simple and reliable, and be easy to realize, and save interface-free resources to greatest extent, and very little to existing connecting system flow process change, reduced the software modification amount.

Description of drawings

Fig. 1 is the spectrum diagram of State Grid Corporation of China's 230 frequency range mandates;

Fig. 2 is linked into the Signalling exchange schematic diagram of wireless communication system by random access procedure for portable terminal;

Fig. 3 is the schematic flow sheet of terminal frequency configuration of the prior art;

Fig. 4 is the Msg2 mapping mode schematic diagram in the traditional TD-LTE230 system;

The frequency point setting schematic flow sheet that Fig. 5 provides for the embodiment of the invention;

Fig. 6 is the Msg2 frequency mapping relations schematic diagram in the embodiment of the invention;

Fig. 7 is the concrete form schematic diagram of the on-position numbering of embodiment two;

Fig. 8 is the competition access running time-frequency resource of embodiment two and the schematic diagram that non-competing running time-frequency resource is configured at each frequency;

Fig. 9 is that the Msg1 of embodiment two is to the mapping relations schematic diagram of Msg2;

Figure 10 upgrades current available frequency schematic diagram for terminal in the embodiment of the invention.

Embodiment

The present invention proposes a kind of terminal frequency mapping and collocation method, its core concept is: observe with the mapping relations of a kind of Msg1 to the Msg2 frequency terminal and base station, determine the frequency of Msg2 behind the terminal reception Msg1 according to these mapping relations, and receive Msg2 at this frequency.

This method comprises the steps:

D, terminal send Msg3 and receive Msg4 at the frequency of Msg2 appointment.

Clearer for the know-why, advantage and the technique effect that make technical solution of the present invention, below by specific embodiment the present invention program is described in detail.

In existing state net TD-LTE230 system, exist an independent configuration file to be used for expression user ID and simple configuration information; Other wireless communication system is GSM/CDMA/LTE etc. for example, all has respective profiles, is used for preserving user configuration information, exists in the SIM card usually.The inventive method is expanded this configuration file, at different industries and different regions, by increasing the industry configuration information, information such as useful frequency position and standby frequency position, guarantee final eat dishes without rice or wine most effective.

One configuration file is set in terminal, preserves following information in this configuration file: current area can be with the frequency total length, be used for showing each frequency whether occupied bitmap table (bitmap), frequency sign, frequency position (representing with frequency values), spectrum allocation may pattern, frequency type (whether being to broadcast frequency), mapping relations.Mapping relations can be for comprising broadcast location, timeslot number, the HASH function of available frequency quantity or the mapping relations of other types.The length of Bitmap can be consistent with the frequency sum with current area.For example, current configuration file represents that available frequency adds up to 60, and then the length of BIT MAP is 60bit.Except adopting the mode of configuration file, also can adopt other modes to make terminal know mapping relations and other information, for example the above-mentioned information of transmitting signaling downwards can be passed through in the base station.

The frequency point setting flow process that the embodiment of the invention provides comprises the steps: as shown in Figure 5

Step 501: terminal reads the frequency configuration of broadcast channel from configuration file (for example user file or SIM card storage file etc.), and receiving broadcasting information on frequency points corresponding selects time slot to send Msg1.

Step 502: the base station generates and sends Msg2, specifies the frequency (possessing 64 optional frequencies) that 6bit represents in Msg2, and the frequency agreement is included in the configuration file.

Step 503: terminal is obtained mapping relations by configuration file, obtains the running time-frequency resource of Msg2, receives Msg2 at this running time-frequency resource.

Step 504: terminal sends Msg3 at the frequency of Msg2 appointment, receives Msg4.

Msg2 frequency mapping relations in the embodiment of the invention as shown in Figure 6.At the N frame, this residential quarter sends Msg1.At the idle time slot of N+1 frame, according to available frequency number, broadcasting frequency point number, obtain the running time-frequency resource of Msg2 by frequency time slot mapping function; If competition inserts, receive Msg2 at the N+2 frame slot; If non-competing access receives Msg2 at the N+3 frame slot.

The input variable of frequency time slot mapping function wherein comprises: 1, PRACH access slot number.2, current available frequency number.3, the broadcasting frequency point number of current access.4, the RA-RNTI of current UE.5, inter-frequency networking pattern.6, whether be the Da Qu mode of operation.Output then is that UE receives MSG2 or application failure at which available frequency at which frame.

Because the core of frequency time slot mapping function is to guarantee that input can be mapped in the output uniformly.Usually output frequency number is less, and input variation space is bigger, therefore has many-to-one mapping.Usually can adopt the method for HASH function or manual establishment rule to solve above-mentioned mapping problems.Below the specific implementation of frequency time slot mapping function is illustrated.

Embodiment one: realize the frequency time slot mapping by the Hash function.

Use this embodiment and need satisfy following precondition:

1, when home base stations is configured to inter-frequency networking, the networking mode by broadcasting or each terminal home base stations of adhering to of system message update (SIB, system information Block) information notification is inter-frequency networking.During starting up of terminal work, be defaulted as the identical networking mode of operation.

Terminal can be determined the frequency point number of which kind of spectrum allocation may pattern of current employing and use according to the frequency of work at present.The frequency sign is kept in the configuration file with the corresponding relation of spectrum allocation may pattern.Owing to adopt Physical Cell Identifier (PCI, Physical Cell Identifier) gets surplus mode divided by 3 and carry out frequency point allocation, so by master sync signal (PSS, primary synchronization signal), auxiliary synchronous signal (SSS, secondary synchronization signal) demodulation, can obtain current PCI value, and the PCI value can confirm which group frequency is current area choose.Thus, terminal can be obtained the legal working frequency points in this residential quarter number, and corresponding spectrum position.

2, be configured to Da Qu when processed when home base stations, inform that by broadcasting each terminal home base stations that the base station is adhered to is configured to the Da Qu system.When terminal sends MSG1 by this validation of information, can allow the number of timeslots that sends.Usually the number of timeslots of residential quarter system permission transmission is 15, and Da Qu then is 7.

Consider the realization workload, configuration file can be realized this Hash function in the following way:

1, PARCH is inserted shift number as high order bit position (when being Da Qu when processed, select 3Bit, be residential quarter selection 4Bit when processed, namely Prach Slot number)

2, UE is positioned at which frequency as intermediate bit position (be 2Bit, represent which bunch)

3, with 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.

The Hash function that utilizes that embodiment one provides determines that the process of frequency is as follows:

According to home base stations whether Da Qu and identical networking whether, from configuration file, obtain actual available frequency number and can receive MSG2 frame position quantity (current is 2), and these data are mapped to prime number sequence corresponding sequence number, find corresponding prime number p.Table 1 has been listed sequence number in the prime number sequence 2 to the prime number of sequence number 10 correspondences.

Sequence number	The 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.P is that sequence number is the prime number of m in the tabulation, and for example prime number is 173 during m=40 (being that available frequency and MSG2 frame position quantity add up to 40), and prime number is 67 when 19;

Long Bit is counted Z, count the prime number p of correspondence divided by available frequency, will obtain a remainder N.This remainder multiply by available frequency quantity, then divided by this prime number, and rounds up, and is the mapping frequency point number of access.

What obtain by said method is the mapping frequency point number, and for example during inter-frequency networking, current is 13 available work frequencies, supports 2 frames to receive, and then shining upon frequency point number is 0～25 (because present frame and next frame can be used).To be converted to the method for actual frequency point number as follows and will shine upon frequency point number:

1, according to current collocation method (for example with frequency/alien frequencies, can pass through number acquisition of MSG1 access frequency point), obtains the frequency of each real work.(can obtain corresponding 40 frequencies or 13 corresponding real work frequencies of frequency).

2, it is corresponding one by one with actual frequency point number divided by 2 backs to shine upon frequency point number, obtain current MSG2 working frequency points number, and after shining upon frequency point number mould 2, then correspondence is that MSG2 is present frame or next frame reception.

By said method, can guarantee that each frequency can use uniformly, guarantees the fairness of used channel.

Embodiment two: realize the frequency time slot mapping by the System Frame Number of eating dishes without rice or wine (SFN) reflection method

Application Example two need satisfy following prerequisite hypothesis:

1, before sending MSG1 message, the UE terminal can be obtained the current System Frame Number of eating dishes without rice or wine (SFN), and length is 16bit.

2, UE can clearly be known the current several bunches of frequencies (being frequency group quantity) that exist.

The SFN reflection method that passes through that embodiment two provides determines that the process of frequency is as follows:

At first, terminal is numbered the on-position of MSG1.

The concrete form of on-position numbering can be referring to Fig. 7.Wherein Group_No represents current bunch or frequency group quantity, and for example current have three bunches, then Group_No=3.Group_index represents then that for example current is the 0th bunch current bunch number, and then this value is 0.Slot_No then represents time slot (slot) total quantity of available Prach, and Da Qu is 7, and the residential quarter is 14.Any one Prach inserts Slot number, will carry out index order: Prach_index=Group_index+Group_No*slot_index in the following manner.Slot_index represents slot number of current access.

Next, will compete access running time-frequency resource and non-competing running time-frequency resource is configured at each frequency.

As shown in Figure 8, suppose that competition access frequency point quantity is M (for example under the LTE230 project normal condition, M=37 under the identical networking situation, M=13 under the inter-frequency networking situation), and the 2nd frame and the reception of the 3rd frame that Msg2 can be after Msg1 sends.Therefore, the access frequency point number consecutively that the 1st time is received Msg2 is 0～M-1, and to the 2nd time, then number consecutively is M～2*M-1.At non-competing access situation, suppose to possess K frequency resource, it is 0～K-1 that this resource is received the frequency resource settings according to the 1st time, is K～2*K-1 and receive the frequency resource settings the 2nd time.

Be following mapping with MSG1 to the process setting of MSG2, specifically as shown in Figure 9:

For competing access-in resource:

0～2*M-1 the running time-frequency resource in MSG1 frequency position (0～Group_No*slot_No-1)-".

For non-competing access-in resource:

0～2*K-1 the running time-frequency resource in MSG1 frequency position (0～Group_No*Nslot_No-1)-".

The current non-competing resource of TD-LTE230 default is mapping mode one by one, corresponding available frequency position, each MSG1 frequency position.When system designs, will preferentially tell available frequency and offer non-competing resource, remaining available frequency then is used for the competition frequency.

For competitive resource, there are three kinds of situations at present:

1, Group_No*Slot_No＜2*M (being that the PRACH of system total quantity is less than available running time-frequency resource), this moment, system possessed enough MSG2 frequency resources, was used for distributing.Obtain this moment as follows

MSG2_Position＝(Prach_index+(SFN mod 2*M))Mod 2*M

The purpose of introducing SFN is to guarantee that each Prach inserts slot and can be linked at random on the whole available frequency, guarantees the access frequency point interference randomization.

2, Group_No*Slot_No=2*M (being that the PRACH of system total quantity is corresponding one by one with available running time-frequency resource).At this moment, the running time-frequency resource of MSG2 reception is realized as follows:

MSG2_Position＝(Prach_index+(SFN mod 2*M))Mod 2*M

SFN is option in expression formula.

3, Group_No*Slot_No＞2*M (be that system's PRACH total quantity is too much, part PRACH inserts actual invalid).The MSG2 receiver, video resource of this moment realizes as follows:

If(Prach_index)≥2*M+(SFN mod 2*M)or(Prach_index)＜(SFN mod 2*M)，

This random access information is invalid, and cancellation sends.

Else

MSG2_Position＝(Prach_index+(SFN mod 2*M))Mod 2*M

SFN is option in expression formula.

For example:

If current Group_No=3, slot_No=14, and the too much situation of PRACH quantity then must take place in M=10, supposes SFN=0 this moment;

Then satisfy more than or equal to 0 or less than 20 the time as prach_index, can insert, otherwise cancel this emission.And under the situation that above-mentioned condition satisfies, Msg2_position just is equivalent to Prach_index.

Because MSG2_Postion is corresponding one by one with real work frequency and working time slot, concrete computational methods can be narrated with reference to the front.Therefore base station and terminal can accurately obtain the time-frequency information of MSG2.

When terminal can change with frequency, need upgrade current available frequency by RRC reprovision process notice terminal.Idiographic flow comprises the steps: as shown in figure 10

Step 1001: terminal is obtained current area and can be used the frequency total length according to configuration file, thus the frequency bitmap table length that decision will receive.What configuration file comprised is general information, for example the whole available frequencies of the industry in an area.

Step 1002: the base station can send the frequency bitmap table with the configuration of frequency situation at this residential quarter industry.

Step 1003: terminal is according to the frequency bitmap table that receives, and the comparative arrangement file disposes thereby obtain available frequency.

It is emphasized that and should obtain all possible situation, and the input configuration file, guarantee to increase in actual use extra available frequency.If increased extra frequency temporarily, then must solve by the Bit Map that sends 480 length.For example, current configuration file represents that available frequency adds up to 60, and indicates frequency point number in configuration file.When the RRC reprovision, be 60 BIT MAP information with sending a length, this BIT MAP correspondence is put 1 frequency point number, for current terminal can be used frequency.Thereby terminal is obtained definite frequency position.

Compared to existing technology, the present invention program has following beneficial effect:

1, can adapt to the difference that inserts running time-frequency resource and the difference of feedback information (MSG2) running time-frequency resource, and original method is fixed correspondence, can't change flexibly.

2, implementation method simple and flexible can adapt to different operative scenario, when having solved communication system change operating frequency and working frequency points, needs the problem of update software and various settings.

3, principle is simple and reliable, is easy to realize, and saves interface-free resources to greatest extent.

4, very little to existing connecting system flow process change, reduced the software modification amount.

Above embodiment is example with the TD-LTE230 systems technology only, based on identical or similar inventive concept, this scheme can be applied to the communication system of other wireless technologys equally, comprise mobile communication system, for example trunked communication systems such as the cell mobile communication systems of Long Term Evolution project (LTE), global system for mobile communications GSM, CDMA and Tetra, IDEN, PDT.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims

1. a terminal frequency shines upon and collocation method, it is characterized in that this method comprises the steps:

D, terminal send Msg3 and receive Msg4 at the frequency of Msg2 appointment.

2. method according to claim 1, it is characterized in that, one configuration file is set in terminal, and preserving current area in this configuration file can be with the frequency total length, be used for showing whether whether occupied bitmap table, frequency sign, frequency position, spectrum allocation may pattern, frequency are to broadcast frequency and mapping relations to each frequency;

3. method according to claim 1 is characterized in that, terminal sends Msg1 at the N frame slot in the steps A;

4. method according to claim 2, it is characterized in that, comprise in the described configuration file that following long number of bits is according to Z: displacement number is inserted for Physical Random Access Channel PARCH in the high order bit position, which frequency intermediate bit position indication UE is positioned at, and low bit is the random access radio network temporary mark RA-RNTI of UE;

5. method according to claim 4 is characterized in that, when residential quarter, UE place is Da Qu when processed, described long number of bits is 3 bits according to the high order bit position of Z; When the cabin at UE place is residential quarter when processed, described long number of bits is 4 bits according to the high order bit position of Z.

6. method according to claim 4 is characterized 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 of Z.

7. method according to claim 2 is characterized in that, the described terminal of step C is according to the mapping relations of Msg1 and Msg2, and the running time-frequency resource that obtains Msg2 comprises:

8. method according to claim 7 is characterized in that, described competition access running time-frequency resource is mapped to remaining available frequency and comprises:

9. according to each described method of claim 1 to 8, it is characterized in that this method further comprises: