CN103944663B

CN103944663B - A kind of enhancing PBCH transmission method and device

Info

Publication number: CN103944663B
Application number: CN201310019846.5A
Authority: CN
Inventors: 徐伟杰; 邢艳萍; 贾民丽
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-01-18
Filing date: 2013-01-18
Publication date: 2017-11-14
Anticipated expiration: 2033-01-18
Also published as: CN103944663A; WO2014111023A1

Abstract

The invention discloses a kind of enhancing PBCH transmission method and device, for while PBCH covering performances are ensured, reducing the production cost of M2M terminals.This method is：Network side is using T radio frames as a TTI transmitting enhancing PBCH, and in a TTI, enhancing PBCH is only mapped in wherein N number of radio frames（N is less than or equal to T）；In each radio frames of above-mentioned N number of radio frames, the symbol for strengthening PBCH after repetition, is mapped on predefined L RE and transmitted by network side.So, only need a PBCH transmission cycle, network side can obtain required merging gain by repeating mapping, this can not only reach enhancing PBCH covering requirement, simultaneously, also data soft bit required for greatly reducing M2M terminals detection PBCH caches, the increase entered without causing M2M terminal chip costs.

Description

A kind of enhancing PBCH transmission method and device

Technical field

The present invention relates to the communications field, more particularly to a kind of enhancing PBCH transmission method and device.

Background technology

Technology of Internet of things is in the ascendant, in 3-G (Generation Three mobile communication system) and its LTE（Long Term Evolution, Long Term Evolution）Need to support MTC in system（Machine Type Communications, machine-type communication）Function.One MTC device（Also referred to as MTC terminal）There may be a variety of M2M（Machine to Machine, machine and machine）Communication characteristic it In part of properties, such as：Hypomobility, transmitted data amount be small, it is insensitive to communication delay, require the features such as extremely low power dissipation.

M2M communication is as a kind of new communication theory, and the purpose is to by a variety of different types of organic knots of the communication technology Close, such as：Machine-to-machine communication, apparatus control communication, man-machine interaction communication, mobile interchange communication etc., so as to promote society Production and the development of life style.It is expected that the business of following Human To Human communication may only account for the 1/3 of whole M2M terminal markets, and Greater amount of communication is machinery compartment（Small bandwidth system）Communication service.

Current mobile communications network is for interpersonal communication scheme, such as：Determination of network capacity etc..Such as The characteristics of fruit is desirable with mobile communications network to support small bandwidth system communication just to need to communicate according to small bandwidth system is to moving The mechanism of dynamic communication system optimizes, so as to be communicated on traditional person to person not by or by smaller situation about influenceing Under, small bandwidth system communication is better achieved.

MTC communication some characteristics that may be present being currently recognized that have：MTC terminal has Hypomobility；MTC terminal with The time that network side carries out data transmission is controllable, i.e., MTC terminal can only be accessed within the period that network is specified； MTC terminal is not high to requirement of real-time to data transfer with the data transfer that network side is carried out, i.e.,：With time tolerance；MTC Final energy is limited, it is desirable to extremely low power consumption；The information transfer of small data quantity is only carried out between MTC terminal and network side； MTC terminal can be managed in units of group；... the MTC terminal of a reality can have above-mentioned one or more Characteristic.

At present, PBCH（Physical Broadcast Channel, Physical Broadcast Channel）It is for carrying MIB （Master Information Block, host system message block）, transmit for the parameter that is initially accessed, in order to ensure PBCH Receptivity, the information bit carried in PBCH is fewer, only 24 bits, joins comprising system necessary to access system Number, including：The PHICH of downlink bandwidth information, cell（Physical Hybrid ARQ Indicator Channel, physics mix Close automatic repeat request instruction channel）And SFN（System Frame Number, System Frame Number）.

It is mainly that passage time diversity gain ensures PBCH receptivity in LTE system；In the transmission of reality, one Individual BCH transmission blocks（Carry downlink bandwidth information, the PHICH and SFN of cell）By adding CRC（Cyclic Redundancy Code, cyclic redundancy）Verify, after convolutional encoding and rate-matched, can be mapped in four radio frames and transmit, it is specific such as Fig. 1 It is shown：

Step 100：CRC is added in BCH transmission blocks waiting for transmission.

For example, in the information a of 24 bits₀,a₁,a₂,a₃,...,a_A-1(A=24) add 16 bit CRC and obtain length as 40 The bit stream c of bit₀,c₁,c₂,c₃,...,c_K-1(k=40)。

Step 110：Convolutional encoding.

By the bit stream c that length is 40 bits₀,c₁,c₂,c₃,...,c_K-1(k=40), by the ratio of convolutional encoding output 120 Special bit stream

Step 120：Rate-matched.

Sequence after will be convolutionally encoded is after rate-matched, output bit flow e₀,e₁,e₂,e₃,...,e_E-1, normal Advise CP（Cyclic Prefix, cyclic prefix）Under, bitstream length E is 1920 bits；The information flow length E in the case where extending CP For 1728 bits.Because PBCH channels are mapped in 4 radio frames, 480 bits are carried under conventional CP per frame so converting into, extension 432 bits are carried under CP per frame.

Step 130：Scrambling.

By the bit stream e Jing Guo rate-matched₀,e₁,e₂,e₃,...,e_E-1Before modulation using the exclusive sequence of a cell Row are scrambled.Scramble the Gold sequence used, each is wireless frame number n_fMeet n_fMod4=0 radio frames（That is PBCH Transmission starting radio frames）Corresponding bit stream scramble sequence initial value beSpecifically scrambling formula is：

Conventional CP, E=1920；Extend CP, E=1728)

Step 140：QPSK（Quadrature Phase Shift Keying, QPSK）Modulation.

By the bit stream after scramblingTurn into information symbol by QPSK modulation

Step 150：Layer mapping and precoding.

It is, layer related to multiple antennas that symbol sebolic addressing after modulation is carried out into layer mapping and pre-encode operation, this process Mapping is that the data symbol modulated is mapped on layer, and layer is the independent channel that can be distinguished in space, is had with channel circumstance Close；Then each layer of data carry out pre-encode operation, have done a matrix change equivalent in transmitting terminal, have made channel quadrature Change, obtain the channel gain of maximum.After layer mapping and precoding, symbolic vector

PBCH is only capable of being transmitted the multi-antenna transmission of diversity, i.e., in two antenna ports, precoding SFBC （Space Frequency Block Coding, space-frequency block codes）, during four antenna ports, precoding uses SFBC/FSTD（Null tone Block code/Frequency Switched Transmit Diversity, frequency error factor send diversity）.Therefore, user is receiving End is only it is to be understood that the mode of precoding, it is possible to knows that antenna port configures.

Step 160：Resource impact.

Resource impact is the mapping for realizing data to actual physical resources, above-mentioned scrambled, modulation, precoding and layer The symbol sebolic addressing of the PBCH channels of mapping is mapped to 4 continuous radio frames（Respectively radio frames 4K, 4K+1,4K+2,4K+3） On, under conventional CP, a radio frames need to map 240 bit lengths（That is M_symb=240）Symbol sebolic addressing, in each radio frames The 0th subframe the 2nd slot（Time slot）Preceding 4 OFDM（Orthogonal Frequency Division Multiplexing, OFDM）The subcarrier upload of centre 72 of symbol is defeated, and exemplified by under conventional CP, one wireless Frame needs to map 240 bit lengths（That is M_symb=240）Symbol sebolic addressing, the symbol sebolic addressing can be mapped in foregoing 4 just Remaining 240 RE of resource shared by downlink reference signal are removed on 72 subcarriers among symbol（Resource Element, Resource unit）On.

PBCH channels are placed on the reason for 72 subcarriers upload among frequency band is defeated to be：Receiving PBCH channel datas Before, user is not aware that system descending bandwidth, only knows the center frequency point of downstream bands, thus PBCH transmission have to Downlink bandwidth size is unrelated, and user completes PSS（Primary Synchronization Signal, master sync signal）With SSS（Secondary Synchronization Signal, secondary synchronizing signal）Reception after, it is possible to know PBCH time-frequency Position, PBCH time-frequency location are specifically as shown in Figure 2.

PBCH channels are mapped to 4 radio frames it can be seen from above-mentioned PBCH sending method（Respectively radio frames 4K, 4K+1、4K+2、4K+3）On, therefore, for the M2M terminals that channel condition is poor, above-mentioned 4 nothings can be distributed in using merging The signal of line frame is to obtain merging gain.Due to M2M terminals and do not know which radio frames is PBCH channel start frames, therefore, M2M terminals repeated detection is needed to attempt to obtain PBCH channel start frames.Detailed process：M2M terminals receive the PBCH of 4 radio frames The data of time-frequency location, data symbol is carried out to include channel equalization, SFBC or SFBC+FSTD decodings/decoding, solution QPSK modulation After operating procedure, the soft bit data using the exclusive scrambler of cell to 4 radio frames（Under conventional CP, each frame is 1920/4= 480 bits, in the case of extending CP, each frame is 1728/4=432 bit）Descrambled, then by solution rate-matched, convolution The series of processing steps such as decoding and CRC check, if CRC check success, illustrate first of 4 received radio frames Radio frames are exactly the start frame of PBCH channels, if CRC check fails, M2M terminals need to abandon first nothing in 4 radio frames The PBCH of line frame data, and the PBCH data of a new radio frames are received, repeat said process.So, tasted by most 4 times Examination, M2M terminals can confirm the start frame of PBCH channels, the SFN values carried with reference to PBCH channels, it is possible to determine each The SFN of radio frames.As can be seen that after M2M terminals merge the data of 4 radio frames, it is necessary to preserve the demodulation of 4 radio frames The symbol data of soft bit data or similar data volume（For example, it is also possible to the data before demodulation are preserved）.

To reach 20dB coverage enhancement, a kind of feasible method is using repetition transmission etc. to LTE system existing channel Reduce the transmission technology of code check., it is necessary to which covering for 20dB can just be met by repeating 100 times even hundreds of times for PBCH channels Lid enhancing.However, because PBCH carries MIB, wherein carrying SFN information, in a PBCH repetition period, the SFN values of carrying Constant can just be obtained in M2M end sides must be kept to merge gain.This method is also referred to as the scheme of coverage enhancement, i.e., by PBCH After the operations such as data block is encoded, rate-matched, data bit flow uniformly scrambles and is mapped to M（M is to meet coverage enhancement mesh Target PBCH numbers of repetition may be 100 to hundreds of）Transmitted in individual radio frames.Accordingly, 4 pieces are merged with existing M2M terminals PBCH data are the same, and M2M terminals are needed according to by the way of sliding window reception, and the PBCH of trial detection each time needs to receive simultaneously The PBCH data of M radio frames and unified descrambling are preserved, until decoding is correct and confirms PBCH transmission starting radio frames, this phase Between, it is desirable to M2M terminals need to preserve the intermediate data of M block PBCH data（For example, the soft bit data after demodulation）.

It is can be seen that from above-mentioned introduction according to PBCH coverage enhancement schemes, decode PBCH each time and attempt to be required to connect Receive and preserve the PBCH data of M radio frames, in order to reach the gain of 20dB coverage enhancements, it is necessary to which existing PBCH channels are repeated At least 100 times, therefore it also will be at least 100 times of existing demand that M2M terminals, which need the data volume that caches,.

By taking the soft bit after M2M terminal buffers demodulation as an example, each wireless soft ratio of frame buffer 480 of existing PBCH channels It is special（Consideration must support conventional CP）, existing method merge 4 radio frames PBCH signals, accordingly M2M terminals need to cache 480*4=1920 soft bit, if reaching 20dB coverage enhancement, the PBCH data for merging M=400 radio frames are needed, it is right 192000 soft bits should be cached.

For the M2M terminals of 3M bandwidth, its HARQ soft bit caching quantity can substantially store about 57600 soft ratios Special data（Consider that M2M terminals support 8 processes）, it can be seen that, even if the caching of M2M terminals is completely used for into PBCH reception Processing, it far can not also meet the soft bit demand of PBCH detection process in above-mentioned PBCH coverage enhancements scheme.

As can be seen here, the problem of transmission plan according to PBCH coverage enhancements can bring M2M terminal buffers to be significantly increased, And in M2M terminal chips for processing data to be buffered in accounting in M2M terminal chip costs larger, thus, use is above-mentioned PBCH coverage enhancements scheme can cause the increase of M2M terminal costs, and it is clearly not that this is popularized for the mass market of M2M terminals Profit.

The content of the invention

The embodiment of the present invention provides a kind of enhancing PBCH transmission method, to while PBCH covering performances are ensured, Reduce the production cost of M2M terminals.

Concrete technical scheme provided in an embodiment of the present invention is as follows：

A kind of enhancing PBCH transmission method, including：

Network side is using T radio frames as a TTI, and in a TTI, network side determines the N for carrying enhancing PBCH Individual radio frames, wherein, N be less than or equal to T, N and T be it is default be more than 1 positive integer；

Network side in each radio frames in N number of radio frames, will strengthen PBCH symbol by repeating respectively Afterwards, map on default L resource unit RE and transmit, wherein, L be it is default be more than 1 positive integer.

A kind of enhancing PBCH transmitting device, the enhancing PBCH that the device is sent using T radio frames as a TTI, including：

Determining unit, in a TTI, it is determined that N number of radio frames for carrying enhancing PBCH, wherein, N is less than etc. In T, N and T be it is default be more than 1 positive integer；

Main Processor Unit, for respectively in each radio frames in N number of radio frames, PBCH symbol will to be strengthened After repetition, map on default L resource unit RE and transmit, wherein, L be it is default be more than 1 positive integer.

A kind of enhancing PBCH method of reseptance, including：

End side receives the enhancing PBCH using T radio frames as a Transmission Time Interval TTI, and end side determines that needs connect The radio frames number N of receipts ', N ' is default positive integer；

End side is repeated below process, until correct detect to strengthen PBCH：

The individual radio frames of continuous N ' are once received, in each radio frames of reception, from repeating mapping in default L Symbolic solution on individual RE separates out enhancing PBCH symbol；

N number of radio frames are chosen from the individual radio frames of the N '；

The symbol of enhancing PBCH corresponding to N number of radio frames is formed into a complex-valued symbol sequence, to the complex-valued symbol sequence Row detection trial recovers PBCH information bits;Wherein, N be less than or equal to T, N and T be it is default be more than 1 positive integer.

A kind of enhancing PBCH reception device, the device receive the increasing using T radio frames as a Transmission Time Interval TTI Strong PBCH, including：

Determining unit, for determining to need the radio frames number N received ', N ' is default positive integer；

Resolution unit, for being repeated below process, until correct detect to strengthen PBCH：

The individual radio frames of continuous N ' are once received, in each radio frames of reception, from repeating mapping at default L Symbolic solution on RE separates out enhancing PBCH symbol；

In the embodiment of the present invention, network side in a TTI, increases using T radio frames as a TTI transmitting enhancing PBCH Strong PBCH is only mapped in wherein N number of radio frames（N is less than or equal to T）；In each radio frames of above-mentioned N number of radio frames, network The symbol for strengthening PBCH after repetition, is mapped on predefined L RE and transmitted by side.So, it is only necessary to which a PBCH is passed Defeated cycle, network side can obtain required merging gain by repeating mapping, and this can not only reach covering for enhancing PBCH Lid requirement, meanwhile, data soft bit required for also greatly reducing M2M terminals detection PBCH caches, and enters without causing M2M whole Hold the increase of chip cost.

Brief description of the drawings

Fig. 1 is base station side PBCH Channel Processing flow charts under prior art；；

Fig. 2 is the time-frequency location schematic diagram of PBCH under prior art；

Fig. 3 is that network side carries out strengthening PBCH transfer process figures in the embodiment of the present invention；

Fig. 4 is the enhancing PBCH flow charts that M2M terminals receive network side transmission in the embodiment of the present invention；

Fig. 5 is the downlink reference signal schematic diagram under common CP in the embodiment of the present invention；

Fig. 6 is that the downlink reference signal schematic diagram under CP is extended in the embodiment of the present invention；

Fig. 7 is to strengthen PBCH resource impact schematic diagrames in the embodiment of the present invention under the first TDD standard routine CP；

Fig. 8 is to strengthen PBCH resource impact schematic diagrames in the embodiment of the present invention under second of TDD standard routines CP；

Fig. 9 is network side apparatus illustrative view of functional configuration in the embodiment of the present invention；

Figure 10 is M2M termination function structural representations in the embodiment of the present invention.

Embodiment

In order to while PBCH covering performances are ensured, the production cost of M2M terminals is reduced, in the embodiment of the present invention, net Network side is using T radio frames as a TTI（Transmission Time Interval, Transmission Time Interval）Transmission enhancing PBCH, in a TTI, enhancing PBCH is only mapped in N number of radio frames（N is less than or equal to T）, and network side is respectively above-mentioned N number of In each radio frames in radio frames, by the symbol for strengthening PBCH after repetition, map on default L RE and transmit.

The preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

As shown in fig.3, in the embodiment of the present invention, the idiographic flow that network side strengthen PBCH transmission is as follows：

Step 300：Network side sends enhancing PBCH by a TTI of T radio frames, and in a TTI, network side determines For carry enhancing PBCH N number of radio frames, wherein, N be less than or equal to T, N and T be it is default be more than 1 positive integer.

In the embodiment of the present invention, carrying strengthens PBCH N number of radio frames in the T radio frames in corresponding TTI with one Fixed pattern distribution, network side and T of the M2M terminals beforehand through N number of radio frames shared by protocol conventions enhancing PBCH in TTI Position distribution in individual radio frames.Preferably, carrying enhancing PBCH N number of radio frames are T radio frames in corresponding TTI N number of continuous radio frames of the interior radio frames using any one agreement as starting radio frames；Or carrying enhancing PBCH N Individual radio frames are any N number of discontinuous radio frames in T radio frames in corresponding TTI；Or carrying enhancing PBCH N Individual radio frames be corresponding TTI in T radio frames in arbitrarily N number of partial discontinuous radio frames（Partial discontinuous refers to portion Divide between radio frames discontinuously）；Or carrying enhancing PBCH N number of radio frames can also be T radio frames in corresponding TTI In top n radio frames.

Further, the starting radio frames in the TTI that preferable network sides use is wireless frame number n_fAnd it is n to meet_f ModT=0 radio frames.

Step 310：Network side in each radio frames in above-mentioned N number of radio frames, will strengthen PBCH symbol respectively After repetition, map on default L RE and transmit, wherein, L be it is default be more than 1 positive integer.

So-called enhancing PBCH symbol be refer to strengthen PBCH carry source information bit by addition CRC, convolutional encoding, It is M to obtain length after rate-matched, scrambling, QPSK modulation, precoding and layer mapping_symbComplex-valued symbol sequence, performing step When rapid 310, network side is divided into N sections after above-mentioned complex-valued symbol sequence is generated, wherein, each section of complex-valued symbol of acquisition Sequence length is M_symb/ N and a radio frames in above-mentioned N number of radio frames, i.e. i-th section of complex-valued symbol sequence are corresponded to respectively（i= 1,2 ... ... N）I-th of radio frames in N number of radio frames where correspondence mappings to enhancing PBCH, then, network side respectively will Each section of complex-valued symbol sequence obtains L symbol based on predefined recurring rule in corresponding radio frames by repeating, then Corresponding L symbol is mapped on default L RE in each radio frames in N number of radio frames respectively and transmitted.

Further, preferably, strengthening the resource shared by PBCH（L RE in i.e. N number of radio frames in each radio frames） For except existing protocol（3GPP versions 11 and LTE protocol before）Specified in channel and signal (e.g., PBCH, PDCCH （Physical Downlink Control Channel, Physical Downlink Control Channel）, downlink synchronous signal and with reference to letter Number) shared by RE outside default L RE.In corresponding radio frames, carrying enhancing PBCH L RE running time-frequency resource, It can be located on one or more subcarriers at system centre frequency band（Overlapped with the frequency band shared by existing system PBCH or Partially overlap）, can also be located at other out-of-band frequency bands of system centre frequency at and with existing system PBCH channels shared by Frequency band is misaligned, and network side is with M2M terminals beforehand through in the frequency band and system shared by the PBCH of protocol conventions coverage enhancement Position relationship between heart frequency, wherein, frequency band shared by existing system PBCH refers to 3GPP versions 11 and Long Term Evolution before PBCH as defined in LTE protocol.

For example, the L RE that network side uses in a radio frame, in systems on J subcarrier of heart frequency band, The time-domain symbol that removing existing system PBCH, downlink synchronous signal take in one or more descending sub frames in above-mentioned radio frames Except the RE on the RE shared by descending public reference signal on K symbol；Subframe, the position in subframe shared by K symbol By network and the advance protocol conventions of M2M terminals, wherein, of RE shared by the reference symbol on K symbol of L=J*K-J subcarrier Number.

In another example：The L RE that network side uses in a radio frame, it is at system of distance center frequency point B MHz （Numbered than existing system center frequency point small or big）Subcarrier centered on J subcarrier on, one in above-mentioned radio frames Or the RE in multiple descending sub frames on K symbol in addition to the RE that descending public reference signal takes；Subframe shared by K symbol, Position in subframe by network and the advance protocol conventions of M2M terminals, wherein, the reference on K symbol of L=J*K-J subcarrier The number of RE shared by symbol.

On the other hand, when performing step 310, network side is by the data bit that coverage enhancement PBCH is carried by addition After CRC, convolutional encoding, rate-matched, scrambling, QPSK modulation, precoding and layer mapping, the complex-valued symbol sequence of output is y（p） (i), i=0 ..., M_symb- 1, above-mentioned processing step is consistent with existing PBCH handling processes, but the data ratio of rate-matched output Special length is E ', and E ' is more than E for agreement is predefined（E size is introduced in the introduction）Integer, and E ' is N Integral multiple.M_symb=E’/2.It is M by length after above-mentioned processing_symbComplex-valued symbol sequence, be mapped in N number of radio frames, The complex-valued symbol number that each radio frames need to carry is M_{symbsingleframe}=M_symb/ N, i.e., complex-valued symbol sequence is divided into N sections Afterwards, the length of each section of complex-valued symbol sequence is M_{symbsingleframe}=M_symb/ N, then, each radio frames are by carrying M_{symbsingleframe}Individual symbol is mapped on the L RE for the PBCH that coverage enhancement is carried in the radio frames.Specific method includes：In N In each radio frames in individual radio frames, network side is by corresponding M_{symbsingleframe}Individual symbol repeats to advise according to predefined Then pass through Q=L/M_{symbsingleframe}Secondary repetition and after selecting L symbol, the Sequential Mapping according to time domain after first frequency domain is in L On RE；Wherein, by taking i-th section of complex-valued symbol sequence as an example, if L is M_{symbsingleframe}Integral multiple, then network side is multiple by i-th section Value symbol sebolic addressing passes through L/（M_symb/N）L symbol is directly obtained after secondary repetition；If the non-M of L_symb/ N integral multiple, then network side will I-th section of complex-valued symbol sequence is passed throughAfter secondary repetition, L symbol before being chosen in all symbols of acquisition, or Person, middle L symbol is chosen, or, L symbol after selection, or, choose any L symbol.

Above-mentioned predefined recurring rule includes but is not limited to the following two kinds：

The first is：Network side is in each radio frames in N number of radio frames, by corresponding M_{symbsingleframe}Individual symbol Number（I.e. corresponding a certain section of complex-valued symbol sequence）It is repeated several times as an entirety.

It is for second：Network side is in each radio frames in N number of radio frames, by corresponding M_{symbsingleframe}Individual symbol Number（I.e. corresponding a certain section of complex-valued symbol sequence）It is repeated several times with symbol rank, i.e., by complex-valued symbol sequence according to symbol One symbol of rank a symbol be repeated several times.

In the above-described embodiments, with prior art similarly, enhancing PBCH is that MIB is mainly comprising descending for transmitting MIB The PHICH and SFN of bandwidth information, cell, wherein, letter of the network with M2M terminals beforehand through protocol conventions enhancing PBCH carryings Cease the concrete meaning expressed by SFN domains in domain.

Specifically, SFN domains are used for the starting radio frames for representing the enhancing PBCH cycles（First radio frames in TTI）Or terminate Radio frames（Last radio frames in TTI）Or the corresponding wireless frame number of the radio frames of other agreements, or, SFN domains are used In the starting radio frames for representing the enhancing PBCH cycles（First radio frames in TTI）Or terminate radio frames（Last nothing in TTI Line frame）Or the high X positions of the binary bits of the corresponding wireless frame number of the radio frames of other agreements, X be protocol conventions just Integer value.

Wherein, when the high X positions of the binary bits of the wireless frame number of SFN domain representations, remaining low S position not carried leads to The PBCH decoded implicits for crossing enhancing obtain, and 2^S>=T.

For example, it is assumed that SFN values are made up of 10 binary bits, what it is when the expression of SFN domains is first in enhancing PBCHTTI Radio frames it is high 3, then strengthen first radio frames in PBCH TTI low 7 be binary sequence " 0000000 ", are strengthened Low 7 of second radio frames are binary sequence " 0000001 " in PBCH TTI, the 3rd radio frames in enhancing PBCH TTI Low 7 the rest may be inferred for binary sequence " 0000010 " ... ....

Based on above-described embodiment, as shown in fig.4, accordingly, M2M terminals receive the detailed of the enhancing PBCH of network side transmission Thread journey is as follows：

Step 400：M2M terminals receive to be determined to need by enhancing PBCH, the M2M terminal that a TTI is transmitted of T radio frames The radio frames number N of reception ', N ' is default positive integer.

Preferably, strengthen N number of nothing where PBCH in the above-mentioned TTI that M2M terminals are made an appointment based on local and network side The position distribution of line frame determines N ' size.Specially：

If N number of radio frames where strengthening PBCH based on agreement are to be arranged in T radio frames in TTI with any one N number of continuous radio frames of the radio frames as starting radio frames, or, the top n in T radio frames in the TTI is wireless Frame, then N=N '；

If for example, N number of radio frames be TTI in continuous 3 radio frames, e.g., radio frames K, radio frames K+1, radio frames K+ 2, then N '=3.

If N number of radio frames where strengthening PBCH based on agreement are any N number of discontinuous in T radio frames in TTI Radio frames, or, for the radio frames of any N number of partial discontinuous in T radio frames in TTI, then N ' is to include N number of enhancing First radio frames of PBCH radio frames and last radio frames and its between all radio frames number sum.

If for example, N number of radio frames be TTI in discontinuous 3 radio frames, e.g., radio frames K, radio frames K+2, radio frames K + 4, then N '=5.

Step 410：M2M end sides are repeated below process, until correct detect to strengthen PBCH：

In the embodiment of the present invention, M2M terminals once receive the individual radio frames of continuous N ', in each radio frames of reception In, can be first respectively in the N ' of reception from repeating mapping when the symbolic solution on default L RE separates out enhancing PBCH symbol In each radio frames in individual radio frames, L symbol is read from default L RE, then respectively by each radio frames pair The L symbol answered carries out deduplication, and it is M to obtain length corresponding to each radio frames_symb/ N complex-valued symbol sequence；It is so-called to go Repeat to refer to the replicated relation in L symbol of the member based on the determination reading of predefined recurring rule between each symbol, then institute Resolution unit is stated to merge the symbol repeated, wherein, predefined recurring rule is, using one section of complex-valued symbol sequence as One entirety is repeated several times；Or one section of complex-valued symbol sequence is repeated several times with symbol rank.

In the embodiment of the present invention, when M2M terminals choose N number of radio frames from the individual radio frames of N ', local and net can be based on The position distribution of N number of radio frames in the TTI that network side is made an appointment where enhancing PBCH, wherein N is chosen in the individual radio frames of N ' Individual radio frames.Specially：

If N number of radio frames where strengthening PBCH based on agreement are to be arranged in T radio frames in TTI with any one N number of continuous radio frames of the radio frames as starting radio frames, or, it is the top n radio frames in T radio frames in TTI, N number of radio frames that then M2M terminals are chosen are the individual radio frames of N ' of reception；

If N number of radio frames where strengthening PBCH based on agreement are any N number of discontinuous in T radio frames in TTI Radio frames, or, for the radio frames of any N number of partial discontinuous in T radio frames in TTI, then M2M terminals are individual wireless by N ' First radio frames of frame as enhancing PBCH where first radio frames, and according to enhancing PBCH where N number of radio frames Distribution determine all N number of radio frames（Referring specifically to the associated description of step 400, will not be repeated here）.

In the embodiment of the present invention, the L RE that M2M terminals are read in each radio frames makes an appointment to be local with network Except PBCH as defined in 3GPP versions 11 and Long Term Evolution LTE protocol before, physical downlink control channel PDCCH, descending same Outside RE shared by step channel and downlink reference signal, L RE.

And the L RE that M2M terminals are read in each radio frames, the one or more at system centre frequency band On subcarrier, and overlap or partially overlap with the frequency band shared by first kind PBCH, or, end side is read in each radio frames The L RE taken, on other out-of-band frequency bands of system centre frequency, and it is misaligned with the frequency band shared by first kind PBCH； Wherein, PBCH as defined in the Long Term Evolution LTE protocols of first kind PBCH for 3GPP versions 11 and before.

On the other hand, the SFN domains that the enhancing PBCH that M2M terminals receive is carried, for representing enhancing PBCH TTI starting The corresponding wireless frame number of radio frames or the radio frames of end radio frames or agreement；Or for representing enhancing PBCH TTI Starting radio frames or terminate radio frames or agreement radio frames corresponding wireless frame number binary bits high X positions, X For the positive integer of setting.

In the above-described embodiments, further, M2M terminals are after it have received the individual radio frames of N ', if from the N number of wireless of selection Enhancing PBCH is correctly parsed in frame, then terminates flow, if failing correctly to parse enhancing from N number of radio frames of selection PBCH, then first radio frames in the individual radio frames of N ' are deleted, and receive a new radio frames, it is individual wireless to form new N ' Frame, then choose N number of radio frames from the new individual radio frames of N ' and continue parsing enhancing PBCH ... ... by that analogy, until correct solution Separate out enhancing PBCH.

Further description is made to above-described embodiment using specific application scenarios below.

Under the first application scenarios, enhancing PBCH and existing PBCH uses identical center frequency point.

Under this application scenarios, coverage enhancement PBCH is sent by the cycle of 400 radio frames, the starting radio frames in each cycle For wireless frame number n_fMeet n_fMod400=0 radio frames, enhancing PBCH are mapped in preceding 40 radio frames in the cycle.With showing Have that mode is similar, the PBCH information bits of 24 bits add 16 bit CRC totally 40 bits, are 120 ratios by convolutional encoding output Spy, the information bit after rate-matched are 480 bits under conventional CP（The PBCH bits of a radio frames carrying can herein Think 240 symbols, exemplified by corresponding to 480 bits, actual bit stream length depends on the stock number of PBCH in a radio frames）* 40（PBCH is mapped to 40 radio frames）=19200 bits, by scrambler sequence scrambling of the length for 19200 bits, QPSK modulation Afterwards, 9600 symbols be mapped to enhancing PBCH where 40 radio frames on, needed in each radio frames carrying 240 symbol Number, length is 240 symbol sebolic addressing（It is designated as S1）It is repeated 10 times, is transformed to the symbol sebolic addressing that length is 2400.

Table 1

（TDD ascending-descending subframes proportional arrangement tables）

In TDD（Time Division Duplex, time division duplex）Under standard, consider to support various TDD ascending-descending subframes Configuration（It is specific as shown in table 1）, strengthen the symbol sebolic addressing that length corresponding to PBCH is 2400 and be mapped in descending sub frame 0, descending son Frame 1, descending sub frame 5 and descending sub frame 6, consider that special subframe is configured with a variety of situations, put aside and mapped in special subframe PBCH。

So, in conventional CP, length be 2400 symbol sebolic addressing according to time domain after first frequency domain Sequential Mapping in system Symbol 3, symbol 5 and the symbol 6 of first time slot of the subframe 0 at heart frequency in 15 PRB, the He of symbol 4 of second time slot Symbol 5, and first time slot of subframe 5 symbol 3 to the symbol 0 of 6, second time slots of symbol to totally 15 symbols of symbol 5 On, totally 2400 RE of RE shared by cell own reference signal are removed, wherein, RE shared by cell own reference signal is specifically such as Fig. 5 Shown in Fig. 6.

Extend under CP, the symbol sebolic addressing length that a radio frames need to carry is 2160, can be mapped in first of subframe 0 The symbol 2 of time slot arrives symbol 5, the symbol 4 of second time slot, when the symbol 2 of first time slot of subframe 5 is to symbol 5, second The symbol 0 of gap arrives symbol 4.

In FDD（Frequency Division Duplex, FDD）Under standard, a radio frames are shared under 10 Row subframe.So the symbol sebolic addressing that length corresponding to enhancing PBCH is 2400 can have more resource selections.

Under conventional CP, strengthen Sequential Mapping of the symbol sebolic addressing according to time domain after first frequency domain that length corresponding to PBCH is 2400 In symbol 3, symbol 4, symbol 5 and the symbol 6 of first time slot of the subframe 0 at system centre frequency in 6 PRB, subframe 5 The symbol 3 of first time slot arrives symbol 6, the symbol 0 of second time slot to symbol 6 totally 15 symbols.

Extend under CP, the symbol sebolic addressing length that a radio frames need to carry is 2160, can be mapped in first of subframe 0 The symbol 2 of time slot is to symbol 5, the symbol 2 of first time slot of subframe 5 to the symbol 0 of 5, second time slots of symbol to symbol 5.

With TDD standards, under conventional CP exemplified by, coverage enhancement PBCH resource impact schematic diagram is as shown in Figure 7.

M2M terminals are in detection, and exemplified by under conventional CP, M2M terminals read each wireless in a PBCH cycle first 2400 symbols on frame, it is the former symbol sebolic addressing that length is 240 by 2400 symbol mergings, demodulated, being changed into length is The soft bit sequence of 480 bits.Obviously, M2M terminals only need to preserve the soft ratio of the bit of 480*40=19200 of 40 radio frames Special sequence, you can to detect PBCH.

The covering gain source of such scheme, from two parts：Rate matching procedure, such scheme are existing PBCH side 10 times of repetitions of case；Resource impact process carries out 10 times of repetitions, equivalent to the 100 times repetitions of both compounds again.

As can be seen that in a PBCH transmission cycle, aforesaid way increases the merging for the repetition that can obtain 100 times Benefit, and the soft bit data buffer storage of M2M terminals is reduced to original 10%（From 192000 soft bits be reduced to 19200 it is soft Bit）, greatly reduce the buffer size needed for M2M terminals demodulation PBCH.Certainly, it is limited by the limit of TDD descending sub frame quantity System, above-mentioned resource impact only consider the descending sub frame that can be configured in subframe 0 and subframe 5 these various TDD uplink-downlink configurations, And do not account for carrying out PBCH resource impacts in special subframe 1 and special subframe 6（6, band system band center, PRB is not carried together The symbol of signal is walked, the subcarrier beyond 6 PRB of the heart can carry the PBCH of coverage enhancement in systems）；If consider in spy Bigger M2M terminal bandwidths are only supported in different subframe mapping PBCH resources and consideration（5MHz bandwidth and more than）, then each nothing 240 symbol sebolic addressing S1 of line frame carrying can pass through to be repeated more times, and then M2M terminal buffers PBCH is further greatly reduced Required soft bit resource overhead, until not having any increase to the cost of M2M terminals.

Under second of application scenarios, enhancing PBCH and existing PBCH uses different frequency bands.

If coverage enhancement PBCH uses the frequency band different from existing PBCH, that is, 6 PRB of system centre frequency band are not take up, Then coverage enhancement PBCH resource impact will not be influenceed by existing PBCH, synchronizing signal etc..So take identical PRB Number, there can be more resource transmission coverage enhancement PBCH.

It is identical with the first application scenarios, it is assumed that coverage enhancement PBCH takes 15 PRB, and in frequency band shared by the PBCH The distance of the center frequency point of center carrier wave system of distance bandwidth is 5MHz.M2M terminals cover with network beforehand through protocol conventions Strengthen the relative position relation of frequency band and system centre frequency shared by PBCH.

Only by taking resource-constrained TDD standards as an example（FDD standards can have more descending sub frame carrying PBCH, using this Scheme can obtain bigger gain）, first Slot symbol 3 of subframe 0, subframe 1, subframe 5 and subframe 6 can be taken to symbol Numbers 6, all 7 symbols of second time slot, remove resource shared by public reference signal, share 4* [(（4+7）*12-20)*15] =6720 RE.Because single radio frames can repeat the length under the first application scenarios for the symbol sebolic addressing S1 of 240 bits Up to 28 times, then M2M terminals are thus further greatly reduced and receive data soft bit caching needed for PBCH signals.Illustrate in detail such as Under：

PBCH is sent by the cycle of 400 radio frames, and the start frame in each cycle is wireless frame number n_fMeet n_fMod400= 0 radio frames, PBCH are mapped in preceding 16 radio frames in the cycle.It is similar with existing way, the PBCH information bits of 24 bits The CRC of 16 bits totally 40 bit is added, is 120 bits by convolutional encoding output, the information bit after rate-matched exists It is 480 bits under conventional CP（The PBCH bits of a radio frames carrying can be carried as 240 symbols, corresponding 480 bits herein Exemplified by, actual bit stream length depends on the stock number of PBCH in a radio frames）*16（PBCH is mapped to 16 radio frames）= 7680 bits.Scrambled by length for the scrambler sequence of 7680 bits, after QPSK modulation, 7680 symbols are mapped to where PBCH 16 radio frames on, in each radio frames carry 240 symbols, length be 240 symbol sebolic addressing（It is designated as S1）Repeat 28 times, it is transformed to the symbol sebolic addressing that length is 6720.The symbol sebolic addressing that length is 6720 is mapped in subframe 0, subframe 1, the and of subframe 5 Symbol 3 in first time slot of subframe 6 is to symbol 6, all 7 symbols of second time slot, in addition to public reference signal Altogether on 6720 RE.

With TDD standards, under conventional CP exemplified by, coverage enhancement PBCH resource impact schematic diagram is as shown in Figure 8.

When M2M terminals detect, exemplified by under conventional CP, M2M terminals read each radio frames in a PBCH cycle first On 6720 symbols, be the former symbol sebolic addressing that length is 240 by 6720 symbol mergings, it is demodulated, be changed into length as 480 The soft bit sequence of bit.M2M terminals only need the soft bit sequence that 480*16=7680 for preserving 4 radio frames are grown, you can with PBCH is detected, is reduced to the 4% of original scheme, and the buffer size amount has been less than M2M terminals HARQ and cached.Amount to number of repetition For 4（Rate matching procedure is repeated 4 times）*28（Resource impact process repeats 28 times）=112 times.

Based on above-described embodiment, as shown in fig.9, in the embodiment of the present invention, network side apparatus is using T radio frames as one TTI sends enhancing PBCH, and the device includes：

Determining unit 90, in a TTI, it is determined that N number of radio frames for carrying enhancing PBCH, wherein, N is less than Equal to T, N and T be it is default be more than 1 positive integer；

Main Processor Unit 91, for respectively in each radio frames in above-mentioned N number of radio frames, PBCH symbol will to be strengthened Number after repetition, map on default L resource unit RE and transmit, wherein, L be it is default be more than 1 positive integer.

Concrete operations performed by above-mentioned determining unit 90 and Main Processor Unit 91 are relative with the method in above-described embodiment Should, this is no longer going to repeat them.

As shown in fig.10, in the embodiment of the present invention, terminal receives enhancing PBCH, the end by a TTI of T radio frames End includes determining unit 100 and resolution unit 101, wherein,

Determining unit 100, for determining to need the radio frames number N received ', N ' is default positive integer；

Resolution unit 101, for being repeated below process, until correct detect to strengthen PBCH：

N number of radio frames are chosen from the individual radio frames of above-mentioned N '；

Concrete operations performed by above-mentioned determining unit 100 and resolution unit 101 are relative with the method in above-described embodiment Should, this is no longer going to repeat them.

In summary, in the embodiment of the present invention, network side is using T radio frames as a TTI transmitting enhancing PBCH, at one In TTI, enhancing PBCH is only mapped in wherein N number of radio frames（N is less than or equal to T）；In each radio frames of above-mentioned N number of radio frames Interior, network side will transmit in the symbol repeating mapping for strengthening PBCH to predefined L RE.So, it is only necessary to which a PBCH is passed Defeated cycle, network side can obtain required merging gain by repeating mapping, and this can not only reach covering for enhancing PBCH Lid requirement, meanwhile, data soft bit required for also greatly reducing M2M terminals detection PBCH caches, and enters without causing M2M whole Hold the increase of chip cost.

It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program production of upper implementation The form of product.

The present invention is with reference to method according to embodiments of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.

These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or The function of being specified in multiple square frames.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in individual square frame or multiple square frames.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification without departing from this hair to the embodiment of the present invention The spirit and scope of bright embodiment.So, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention And its within the scope of equivalent technologies, then the present invention is also intended to comprising including these changes and modification.

Claims

1. a kind of transmission method for strengthening Physical Broadcast Channel PBCH, network side is using T radio frames as a Transmission Time Interval TTI sends enhancing PBCH, it is characterised in that including：

In a TTI, network side determines N number of radio frames for carrying enhancing PBCH, wherein, it is pre- that N, which is less than T, N and T, If be more than 1 positive integer；

Network side will strengthen source information bit that PBCH carries by addition cyclic redundancy CRC, convolutional encoding, rate-matched plus It is M to disturb, obtain length after QPSK QPSK modulation, precoding and layer mapping_symbComplex-valued symbol sequence, and will described in Complex-valued symbol sequence is divided into N sections, wherein, each section of complex-valued symbol sequence length of acquisition is M_symb/ N and correspond to respectively described A radio frames in N number of radio frames；

Each section of complex-valued symbol sequence is based on predefined recurring rule through overweight by network side in corresponding radio frames respectively Regain L symbol；

Corresponding L symbol is mapped to default L by network side in each radio frames in N number of radio frames respectively Transmitted on RE.

2. the method as described in claim 1, it is characterised in that be used to carry enhancing PBCH in the TTI that network side uses N number of radio frames, including：

The N number of radio frames made an appointment in the TTI by network side and end side.

3. method as claimed in claim 2, it is characterised in that by network side and end side in the TTI that network side uses The N number of radio frames made an appointment, including：

It is N number of continuous wireless using the radio frames of any one agreement as starting radio frames in T radio frames in the TTI Frame；Or

The top n radio frames in T radio frames in the TTI；Or

Any N number of discontinuous radio frames in T radio frames in the TTI；Or

The radio frames of any N number of partial discontinuous in T radio frames in the TTI.

4. the method as described in claim 1, it is characterised in that the starting radio frames in the TTI that network side uses is nothings Line frame number n_fAnd it is n to meet_fModT=0 radio frames.

5. the method as described in claim any one of 1-4, it is characterised in that network side is respectively in N number of radio frames In each radio frames, by the symbol for strengthening PBCH after repetition, map on default L resource unit RE and transmit, wrap Include：

Network side in each radio frames in N number of radio frames, by the symbol for strengthening PBCH after repetition, reflects respectively It is incident upon except PBCH as defined in 3GPP versions 11 and Long Term Evolution LTE protocol before, physical downlink control channel PDCCH, descending Outside RE shared by synchronizing channel and downlink reference signal, transmitted on default L RE.

6. the method as described in claim 1, it is characterised in that network side is by any one section of complex-valued symbol sequence in corresponding nothing L symbol is obtained by repeating based on predefined recurring rule in line frame, including：

If L is M_symb/ N integral multiple, then any one section of complex-valued symbol sequence is passed through into L/ (M_symb/ N) after secondary repetition directly Obtain L symbol；

If the non-M of L_symb/ N integral multiple, then any one section of complex-valued symbol sequence is passed throughAfter secondary repetition, L symbol before being chosen in all symbols of acquisition, or, middle L symbol is chosen, or, L symbol after selection, or Choose any L symbol.

7. the method as described in claim 1, it is characterised in that the predefined recurring rule that network side uses includes：It will appoint One section of complex-valued symbol sequence of meaning is repeated several times as an entirety；Or by any one section of complex-valued symbol sequence with Symbol rank is repeated several times.

8. the method as described in claim any one of 1-4, it is characterised in that the L RE that network side uses, in system On one or more subcarriers at heart frequency band, and overlap or partially overlap with the frequency band shared by first kind PBCH, or,

Network side use L RE, on other out-of-band frequency bands of system centre frequency, and with first kind PBCH shared by Frequency band is misaligned；

Wherein, PBCH as defined in the Long Term Evolution LTE protocols of the first kind PBCH for 3GPP versions 11 and before.

9. the method as described in claim any one of 1-4, it is characterised in that the SFN that the enhancing PBCH of network side transmission is carried Domain, the corresponding radio frames for the starting radio frames for representing enhancing PBCHTTI or the radio frames for terminating radio frames or agreement are compiled Number；Or

The SFN domains that the enhancing PBCH of network side transmission is carried, for representing enhancing PBCH TTI starting radio frames or terminating nothing The high X positions of the binary bits of the corresponding wireless frame number of the radio frames of line frame or agreement, X is the positive integer of setting.

10. a kind of transmitting device for strengthening Physical Broadcast Channel PBCH, the device is using T radio frames as a Transmission Time Interval TTI sends enhancing PBCH, it is characterised in that including：

Determining unit, in a TTI, it is determined that N number of radio frames for carrying enhancing PBCH, wherein, N is less than T, N and T Be it is default be more than 1 positive integer；

Main Processor Unit, for the source information bit by PBCH carryings are strengthened by addition cyclic redundancy CRC, convolutional encoding, speed It is M to obtain length after rate matching, scrambling, QPSK QPSK modulation, precoding and layer mapping_symbComplex-valued symbol sequence Row, and the complex-valued symbol sequence is divided into N sections, wherein, each section of complex-valued symbol sequence length of acquisition is M_symb/ N and A radio frames in N number of radio frames are corresponded to respectively, and respectively by each section of complex-valued symbol sequence corresponding wireless L symbol, and each nothing in N number of radio frames respectively are obtained by repeating based on predefined recurring rule in frame Corresponding L symbol is mapped on default L RE in line frame and transmitted.

11. device as claimed in claim 10, it is characterised in that the TTI that the determining unit determines to use is used to hold Enhancing PBCH N number of radio frames are carried, including：

12. device as claimed in claim 11, it is characterised in that by net in the TTI that the determining unit determines to use N number of radio frames that network side and end side are made an appointment, including：

The top n radio frames in T radio frames in the TTI；Or

Any N number of discontinuous radio frames in T radio frames in the TTI；Or

13. device as claimed in claim 10, it is characterised in that rising in the TTI that the determining unit determines to use Beginning radio frames are wireless frame number n_fAnd it is n to meet_fModT=0 radio frames.

14. the device as described in claim any one of 10-13, it is characterised in that the Main Processor Unit is respectively in the N In each radio frames in individual radio frames, by the symbol for strengthening PBCH after repetition, default L resource unit is mapped to Transmitted on RE, including：

In each radio frames in N number of radio frames, the symbol for strengthening PBCH is passed through respectively for the Main Processor Unit After repeating, PBCH, Physical Downlink Control Channel as defined in Long Term Evolution LTE protocol except 3GPP versions 11 and before are mapped to Outside RE shared by PDCCH, descending synchronous signal channel and downlink reference signal, transmitted on default L RE.

15. device as claimed in claim 10, it is characterised in that the Main Processor Unit is by any one section of complex-valued symbol sequence L symbol is obtained by repeating based on predefined recurring rule in corresponding radio frames, including：

If L is M_symb/ N integral multiple, then the Main Processor Unit any one section of complex-valued symbol sequence is passed through into L/ (M_symb/ N) L symbol is directly obtained after secondary repetition；

If the non-M of L_symb/ N integral multiple, then the Main Processor Unit any one section of complex-valued symbol sequence is passed throughAfter secondary repetition, L symbol before being chosen from all symbols obtained, or, middle L symbol is chosen, or Person, L symbol after selection, or, choose any L symbol.

16. device as claimed in claim 10, it is characterised in that the predefined recurring rule that the Main Processor Unit uses Including：It is repeated several times any one section of complex-valued symbol sequence as an entirety；Or any one section of complex value is accorded with Number sequence is repeated several times with symbol rank.

17. the device as described in claim any one of 10-13, it is characterised in that the L RE that the Main Processor Unit uses, On one or more subcarriers at system centre frequency band, and overlap with the frequency band shared by first kind PBCH or partly weigh Close, or,

The L RE that the Main Processor Unit uses, on other out-of-band frequency bands of system centre frequency, and and the first kind Frequency band shared by PBCH is misaligned；

18. the device as described in claim any one of 10-13, it is characterised in that the enhancing of the Main Processor Unit transmission The SFN domains that PBCH is carried, strengthen PBCH TTI starting radio frames for expression or terminate the radio frames of radio frames or agreement Corresponding wireless frame number；Or

The SFN domains that the enhancing PBCH of the Main Processor Unit transmission is carried, for representing enhancing PBCH TTI starting radio frames Or terminating the high X positions of the binary bits of the corresponding wireless frame number of the radio frames of radio frames or agreement, X is the just whole of setting Number.

19. a kind of method of reseptance for strengthening Physical Broadcast Channel PBCH, end side are received using T radio frames as a transmission time It is spaced TTI enhancing PBCH, it is characterised in that including：

End side determines to need the radio frames number N received ', N ' is default positive integer；

End side is repeated below process, until correct detect to strengthen PBCH：

Respectively in each radio frames in the individual radio frames of N ' of reception, L symbol is read from default L RE, and Respectively will L symbol progress deduplication corresponding to each described radio frames, obtain each radio frames corresponding to length be M_symb/ N complex-valued symbol sequence；

The symbol of enhancing PBCH corresponding to N number of radio frames is formed into a complex-valued symbol sequence, the complex-valued symbol sequence is examined Survey trial and recover PBCH information bits；Wherein, N be less than T, N and T be it is default be more than 1 positive integer.

20. method as claimed in claim 19, it is characterised in that end side determines to need the radio frames number N received ', bag Include：

The position point of N number of radio frames in the TTI that end side is made an appointment based on local and network side where enhancing PBCH Cloth determines N ' size.

21. method as claimed in claim 20, it is characterised in that described in end side is made an appointment based on local and network side The position distribution of N number of radio frames in TTI where enhancing PBCH determines N ' size, including：

If N number of radio frames where strengthening PBCH based on agreement are to be arranged in T radio frames in the TTI with any one Radio frames as starting radio frames N number of continuous radio frames, or, be the TTI in T radio frames in top n without Line frame, then N=N '；

If N number of radio frames where strengthening PBCH based on agreement are any N number of discontinuous in T radio frames in the TTI Radio frames, or, for the radio frames of any N number of partial discontinuous in T radio frames in the TTI, then N ' is to include N number of increasing First radio frames and last radio frames of strong PBCH radio frames and its between all radio frames number sum.

22. method as claimed in claim 19, it is characterised in that end side respectively will L corresponding to each described radio frames Individual symbol carries out deduplication, including：

Replicated relation in the L symbol that end side is read based on the determination of predefined recurring rule between each symbol；

End side merges the symbol repeated；

Wherein, the predefined recurring rule is to be repeated several times one section of complex-valued symbol sequence as an entirety；Or Person, one section of complex-valued symbol sequence is repeated several times with symbol rank.

23. method as claimed in claim 20, it is characterised in that chosen from the individual radio frames of the N ' N number of wireless in end side Frame, including：

The position point of N number of radio frames in the TTI that end side is made an appointment based on local and network side where enhancing PBCH Cloth, wherein N number of radio frames are chosen in the individual radio frames of the N '.

24. method as claimed in claim 23, it is characterised in that described in end side is made an appointment based on local and network side The position distribution of N number of radio frames in TTI where enhancing PBCH, chooses wherein N number of radio frames in the individual radio frames of the N ', wraps Include：

If N number of radio frames where strengthening PBCH based on agreement are to be arranged in T radio frames in the TTI with any one Radio frames as starting radio frames N number of continuous radio frames, or, be the TTI in T radio frames in top n without Line frame, the then N number of radio frames chosen are the individual radio frames of N ' of reception；

If N number of radio frames where strengthening PBCH based on agreement are any N number of discontinuous in T radio frames in the TTI Radio frames, or, be the TTI in T radio frames in arbitrarily N number of partial discontinuous radio frames, then by the individual nothings of the N ' First radio frames of line frame are as first radio frames where enhancing PBCH, and according to N number of wireless where enhancing PBCH Frame is distributed to determine all N number of radio frames.

25. the method as described in claim any one of 19-24, it is characterised in that read in each radio frames end side L RE, be as defined in the Long Term Evolution LTE protocol except 3GPP versions 11 and before made an appointment locally by terminal and network Outside RE shared by PBCH, physical downlink control channel PDCCH, descending synchronous signal channel and downlink reference signal, L RE.

26. the method as described in claim any one of 19-24, it is characterised in that read in each radio frames end side L RE, on one or more subcarriers at system centre frequency band, and overlap with the frequency band shared by first kind PBCH or Partially overlap, or, the L RE that end side is read in each radio frames, positioned at system centre frequency it is out-of-band other On frequency band, and it is misaligned with the frequency band shared by first kind PBCH；The first kind PBCH is long-term for 3GPP versions 11 and before PBCH as defined in evolution LTE protocol.

27. the method as described in claim any one of 19-24, it is characterised in that what the enhancing PBCH that end side receives was carried SFN domains, for representing enhancing PBCH TTI starting radio frames or terminating wireless corresponding to the radio frames of radio frames or agreement Frame number；Or

The SFN domains that the enhancing PBCH that end side receives is carried, for representing enhancing PBCH TTI starting radio frames or terminating nothing The high X positions of the binary bits of the corresponding wireless frame number of the radio frames of line frame or agreement, X is the positive integer of setting.

28. a kind of reception device for strengthening Physical Broadcast Channel PBCH, the device are received using T radio frames as a transmission time It is spaced TTI enhancing PBCH, it is characterised in that including：

29. device as claimed in claim 28, it is characterised in that the determining unit determines to need the radio frames number received N ', including：

Strengthen N number of radio frames where PBCH in the TTI that the determining unit is made an appointment based on local and network side Position distribution determines N ' size.

30. device as claimed in claim 29, it is characterised in that the determining unit is based on local and network side and made an appointment The TTI in strengthen the position distributions of N number of radio frames where PBCH and determine N ' size, including：

If N number of radio frames where strengthening PBCH based on agreement are to be arranged in T radio frames in the TTI with any one Radio frames as starting radio frames N number of continuous radio frames, or, be the TTI in T radio frames in top n without Line frame, it is determined that N=N '；

If N number of radio frames where strengthening PBCH based on agreement are any N number of discontinuous in T radio frames in the TTI Radio frames, or, for the radio frames of any N number of partial discontinuous in T radio frames in the TTI, it is determined that N ' is to include N First radio frames and last radio frames of individual enhancing PBCH radio frames and its between all radio frames number sum.

31. device as claimed in claim 28, it is characterised in that the resolution unit respectively will each described radio frames pair The L symbol answered carries out deduplication, including：

Replicated relation in the L symbol that the resolution unit is read based on the determination of predefined recurring rule between each symbol；

The resolution unit merges the symbol repeated；

32. device as claimed in claim 29, it is characterised in that the resolution unit chooses N from the individual radio frames of the N ' Individual radio frames, including：

Strengthen N number of radio frames where PBCH in the TTI that the resolution unit is made an appointment based on local and network side Position distribution, wherein N number of radio frames are chosen in the individual radio frames of the N '.

33. device as claimed in claim 32, it is characterised in that the resolution unit is based on local and network side and made an appointment The TTI in strengthen PBCH where N number of radio frames position distribution, wherein N number of nothing is chosen in the individual radio frames of the N ' Line frame, including：

If N number of radio frames where strengthening PBCH based on agreement are to be arranged in T radio frames in the TTI with any one Radio frames as starting radio frames N number of continuous radio frames, or, be the TTI in T radio frames in top n without Line frame, then N number of radio frames that the resolution unit is chosen are the individual radio frames of N ' of reception；

If N number of radio frames where strengthening PBCH based on agreement are any N number of discontinuous in T radio frames in the TTI Radio frames, or, be any radio frames of N number of partial discontinuous in T radio frames in the TTI, then the resolution unit Using first radio frames of the individual radio frames of the N ' as first radio frames where enhancing PBCH, and according to enhancing PBCH institutes The distributions of N number of radio frames determine all N number of radio frames.

34. the device as described in claim any one of 29-33, it is characterised in that the resolution unit is in each radio frames L RE of middle reading, for as defined in the local Long Term Evolution LTE protocol except 3GPP versions 11 and before made an appointment with network Outside RE shared by PBCH, physical downlink control channel PDCCH, descending synchronous signal channel and downlink reference signal, L RE.

35. the device as described in claim any one of 29-33, it is characterised in that the resolution unit is in each radio frames L RE of middle reading, on one or more subcarriers at system centre frequency band, and the frequency band shared by with first kind PBCH Overlap or partially overlap, or, the L RE that end side is read in each radio frames, outside system centre frequency frequency band Other frequency bands on, it is and misaligned with the frequency band shared by first kind PBCH；The first kind PBCH is for 3GPP versions 11 and before Long Term Evolution LTE protocol as defined in PBCH.

36. the device as described in claim any one of 29-33, it is characterised in that the enhancing PBCH that the resolution unit receives The SFN domains of carrying, for the starting radio frames for representing enhancing PBCH TTI or the correspondence for the radio frames for terminating radio frames or agreement Wireless frame number；Or