CN102271023B - Method and device for detecting system frame number of long term evolution (LTE) system - Google Patents
Method and device for detecting system frame number of long term evolution (LTE) system Download PDFInfo
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Abstract
The invention relates to the field of wireless communication, and in particular relates to a method and device for detecting a system frame number of a long-term evolution (LTE) system. The method comprises the following steps of: equally dividing a scrambling sequence C of a TTI (transmission time interval) into four sections by using the self-decoding characteristic of PBCH (physical broadcast channel) data of a wireless frame, respectively descrambling with the PBCH data generated in the first step, after matching a descrambling rate, selecting whether to adopt a merge algorithm or not according to a condition, and then carrying out channel decoding and CRC (cyclic redundancy check), judging whether to continuously receive the data of a next wireless frame or not according to a CRC result, and determining the system frame number according to the adopted scrambling sequence. The device comprises a receiving module (10), a signal processing module (20) and an adjudicating module (30). The invention can improve the efficiency of a terminal in the blind check of the PBCH, decreases power consumption, and determines the system frame number as quickly as possible, so as to be convenient to the read of a subsequent system message.
Description
Technical field
The present invention relates to field of wireless communication, particularly a kind of method and device of Long Term Evolution LTE system of systems frame number detection.
Background technology
Day by day increase demand to the data business in order to satisfy people, (The 3 for third generation partner program
RdGeneration Partnership Project, abbreviation 3GPP) started 3GPP " Long Term Evolution project ", be called for short 3GPP LTE (Long Term Evolution), this project is intended to the 3G (Third Generation) Moblie 3G system by continuous evolution, provide more powerful data service support, for the user provides better service.
Among the 3GPP standard TS 36.211 definition LTE TDD system frame structure as shown in Figure 1, LTE FDD system frame structure is as shown in Figure 2.
LTE TDD system wireless frame length is 10ms, corresponding 307200Ts.Each radio frames again Further Division is the field of two 5ms, and each field comprises 5 1ms subframes.If system is 5ms in the up-downgoing transfer point cycle; then second subframe in each field is special subframe, and order comprises descending pilot frequency time slot (referred to as DwPTS), main protection interval (referred to as GP), uplink pilot time slot (referred to as UpPTS).Described DwPTS, GP, UpPTS are respectively applied to cell ID and up-downgoing protection interval and uplink synchronous are set up, provided to initial synchronisation.If system is 10ms in the up-downgoing transfer point cycle, then special subframe exists only in the first field in the radio frames.In each field, 5 subframes also comprise conventional subframe except special subframe, comprise again two 0.5ms time slots in each conventional subframe.Each subframe label i=0～9 in the radio frames, each conventional subframe jurisdiction time slot label is respectively 2i, 2i+1.Subframe 0,5, DwPTS are used for downlink transfer all the time, and the conventional subframe that is right after behind the special subframe and UpPTS are used for uplink all the time.
LTE FDD system wireless frame length also is 10ms, corresponding 307200Ts.A radio frames comprises 20 time slots, and sequence number is 0 to 19, the long 0.5ms of each time slot.A subframe is made of two continuous time slots, and namely subframe i comprises time slot 2i and 2i+1.10 subframes can be used for downlink transmission and also can be used for ul transmissions.The frequency domain isolation is pressed in the up-downgoing transmission.
No matter be at LTE TDD system frame structure, or in LTE FDD system frame structure, subframe # 0 always is used for downlink transfer, Physical Broadcast Channel (Physical broadcast channel is called for short PBCH) only is mapped on the subframe # 0 of radio frames.A Transmission Time Interval (Transmission Time Interval, abbreviation TTI) PBCH data-mapping is to the subframe # 0 of four continuous radio frames, and first radio frames of mapping must satisfy the condition of SFN mod 4=0, wherein, SFN represents System Frame Number, and mod represents the complementation computing.
In the LTE system, after terminal is finished cell initial search, in order to carry out the user data demodulation, need first read system message.Terminal is the Master Information Block of read system message (Master Information Block at first, MIB), because MIB transmits in PBCH, so by first demodulation PBCH, just can read MIB, and the acquisition system frame number SFN, then understand system information block 1 (System Information BlockType1 is called for short SIB1) and other system message according to SFN.Determining of system frame number SFN is most important to the deciphering of the system messages such as SIB1.
System Frame Number is represented by 10bit in the LTE system, and high 8bit dominant notice in MIB wherein just can be known after reading MIB; And low 2bit is by the recessive notice of PBCH mapping, as shown in Figure 3.In a TTI, first radio frames of mapping PBCH represents that 00, the second radio frames represents that 01, the three radio frames represents 10, the 4th radio frames represents 11, the low 2bit of the position determination system frame number SFN of the wireless frame data of passing through to receive in a TTI.
According to 3GPP standard TS 36.211 and TS 36.212 as can be known, Physical Broadcast Channel PBCH transmitting terminal signal processing flow, as shown in Figure 4:
1) the Master Information Block MIB of 24bit becomes 40bit after adding 16bit cyclic redundancy check (CRC) code CRC.
2) the 40bit data behind the additional CRC are through stinging the data that obtain 120bit after tail (Tail Biting) convolutional encoding.
3) the 120bit data after the chnnel coding if regular circulation prefix (CyclicPrefix is called for short CP) then obtains the data of 1920bit, if be expansion CP, then obtain the data of 1728bit through after the rate-matched.
4) then the scrambler sequence C of a TTI of generation carries out scrambling to the PBCH transmission block.
5) through after the QPSK modulation, obtain 960symbol (conventional CP) or 864symbol (expansion CP).
6) then through layer mapping and precoding processing.If number of transmit antennas is 1, then adopt layer mapping and pre-coding scheme based on the single antenna sending mode; If number of transmit antennas is 2 or 4, then adopt layer mapping and pre-coding scheme based on transmit diversity.
7) be mapped on the physical resource unit.Number of transmit antennas for 1,2 or 4 is used identical physical resource mapping mode, namely no matter how many number of transmit antennas is, always vacate the pilot resources of 4 antennas; In addition, the PBCH data-mapping of a TTI is on four continuous radio frames, and first radio frames of mapping must satisfy the condition of SFN mod 4=0, front 4 OFDM symbols of the slot# 1 of each radio frames (the 1.08MHz bandwidth at a band occupancy center (72 subcarriers)) are used for mapping PBCH data, as shown in Figure 3.
8) modulate to generate the PBCH baseband signal finally by crossing OFDM.
According to foregoing description as can be known, in order to determine system frame number SFN, not only need correctly to detect PBCH, with the high 8bit of acquisition SFN, but also need the definite position of wireless frame data in a TTI that receive, to obtain the low 2bit of SFN.Usually terminal receives the PBCH data of a complete TTI, and the signal processing of employing and transmitting terminal contrary, carries out the detection of PBCH, and with definite System Frame Number, but the efficient that this method is processed is lower, complexity is higher and power consumption of terminal is larger.
Summary of the invention
The technical problem that the present invention solves is to have proposed a kind of Long Term Evolution LTE system of systems frame number detection method, detect PBCH by a radio frames or the merging of a plurality of radio frames, determine System Frame Number, thereby reduce implementation complexity and the power consumption of terminal, and determine as early as possible System Frame Number, so that the reading of follow-up system message.
For overcoming the above problems, the present invention proposes a kind of Long Term Evolution LTE system of systems frame number detection method, as shown in Figure 5, comprising:
Steps A: terminal receives the time-domain signal of first subframe on the radio frames, adopts the signal processing with the transmitting terminal contrary, obtains treating the Physical Broadcast Channel PBCH data A of descrambling;
Step B: produce the scrambler sequence C of a time interval TTI, scrambler sequence C is divided into 4 sections, every segment length equals the length of data A, and data A is carried out descrambling with 4 sections scrambler sequence successively, obtains respectively data behind 4 parts of descramblings.
Step C: respectively the data behind 4 parts of descramblings are done rate de-matching, preserve rate de-matching output data;
Step D: the data behind the rate de-matching are done channel decoding;
Step e: channel decoding output data are done the cyclic redundancy CRC check, if there is any CRC check correct, then obtain System Frame Number, flow process finishes; Otherwise, go back to steps A, repeat above process until arbitrary CRC check is correct.
Preferably, as a kind of improvement execution mode, after described step C preserves rate de-matching output data, determine whether to receive the PBCH data for the first time, if so, direct execution in step D then; Otherwise the rate de-matching output data of preserving with the last time merge rear execution in step D.
Preferably, improve execution mode as another kind, if all CRC check of described step e are failure all, then determine whether to receive for the first time the PBCH data, if, then forward steps A to, otherwise, the rate de-matching output data of step C preservation are exported data with the rate de-matching of last time preservation respectively merge rear execution in step D.
Described data are merged into the rate de-matching output that the second segment scrambler sequence of this preservation is the corresponding rate de-matching output corresponding with the first paragraph scrambler sequence of preserving last time and are merged, the rate de-matching output that the 3rd section rate de-matching that scrambler sequence is corresponding output of this preservation is corresponding with the second segment scrambler sequence of preserving last time merges, the 4th section rate de-matching that scrambler sequence is corresponding output of this preservation is merged with the 3rd section rate de-matching that scrambler sequence the is corresponding output of preserving last time, and rate de-matching output corresponding to the first paragraph scrambler sequence of this preservation does not participate in merging; Addition after the two segment data contraposition weightings.
The coefficient of described weighting depends on the merging mode, and the merging mode adopts merging or equal gain combining or the high specific merging mode etc. selected.
For overcoming the above problems, the present invention also provides a kind of LTE system of systems frame number checkout gear, comprising:
Receiver module 10 for the time-domain signal that receives first first subframe on the radio frames, perhaps receives the time-domain signal of first subframe on the radio frames again according to the judgement indication of judging module 30;
Signal processing module 20, time-domain signal according to first subframe on the radio frames of receiver module 10 outputs, finish PBCH receiving end signal handling process, comprise that further removing CP unit 201, OFDM demodulating unit 202, solution resource mapping unit 203, channel estimating unit 204, detecting signal unit 205 and QPSK demodulating unit 206, scrambler generates and descrambling unit 207, rate de-matching unit 208, channel decoding unit 209 and CRC check unit 210;
Described signal processing module 20 further comprises:
PBCH counting unit 220, the PBCH counting also determines whether to receive for the first time the PBCH data;
Data merge cells 230 adopts and selects merging or the modes such as equal gain combining or high specific merging that rate de-matching output data are merged;
Data merge cells 230 determines whether work according to PBCH counting unit 220 judged results, if being judged as, PBCH counting unit 220 receives the PBCH data for the first time, then data merge cells 230 is not worked, data are directly passed to channel decoding unit 209, otherwise data pass to channel decoding unit 209 after data merge cells 230 is processed.
Judging module 30, CRC check result according to signal processing module 20 judges whether to finish, if described CRC check unit judges has any CRC check correct, then the high 8bit of System Frame Number obtains from MIB, the sequence number of the scrambler sequence that low 2bit adopts from step B obtains, thereby obtains System Frame Number; Otherwise indication receiver module 10 receives the time-domain signal of first subframe on the radio frames again.
The present invention utilizes the self-demarking code characteristic of the PBCH data of a radio frames, and the scrambler sequence C of a TTI is divided into 4 sections, and the PBCH data that generate with the first step are respectively carried out descrambling.Through behind the rate de-matching, according to circumstances select whether adopt merge algorithm, pass through again channel decoding and CRC check, judge whether that according to the CRC check result needs continue to receive next wireless frame data, and determine System Frame Number according to the scrambler sequence that adopts.Compared with prior art, System Frame Number detection method provided by the invention has following beneficial effect:
1) efficient of raising terminal blind check PBCH reduces power consumption
Although the PBCH data-mapping of a TTI transmits on 4 continuous radio frames, but the present invention has utilized the self-demarking code characteristic of radio frames PBCH data, the PBCH data of namely utilizing a radio frames successively 4 section scrambler sequence corresponding with 4 radio frames among the TTI are carried out descrambling, thereby avoid receiving the PBCH data of a complete TTI and detecting.Realized the correct PBCH of detection data within the shortest time, and definite System Frame Number.Even in the situation that channel circumstance worsens, also can merge mode by the PBCH data of a plurality of radio frames, be implemented in the correct PBCH of detection data in the short time.
2) the merge algorithm universality is strong
At transmitting terminal, first radio frames of the PBCH data-mapping of a TTI must satisfy SFN mod 4=0 condition, and the PBCH data transformation is identical between two TTI.During the terminal receive data, can not guarantee it is that first radio frames from TTI begins to receive.Terminal might be that from TTI second, the 3rd or the 4th radio frames begin to receive the PBCH data.No matter which radio frames of terminal from TTI begins to receive the PBCH data, can both utilize merge algorithm that the present invention proposes that itself and the data that receive are later merged, to reach the purpose of correct detection.
Description of drawings
Fig. 1 is prior art LTE system TDD mode frame structure;
Fig. 2 is the prior art LTE FDD of system mode frame structure;
Fig. 3 is the running time-frequency resource mapping graph of prior art PBCH;
Fig. 4 is prior art PBCH transmitting terminal signal processing flow;
Fig. 5 is LTE system of systems frame number detection method flow chart of the present invention;
Fig. 6 is LTE system of systems frame number detection method preferred implementation one flow chart of the present invention;
Fig. 7 is LTE system of systems frame number detection method preferred implementation two flow charts of the present invention;
Fig. 8 is consolidation strategy key diagram of the present invention;
Fig. 9 is LTE system of systems frame number structure of the detecting device figure of the present invention;
Figure 10 is LTE system of systems frame number checkout gear signal processing module structure chart of the present invention;
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and the embodiments, a kind of Long Term Evolution LTE of the present invention system of systems frame number detection method and device are described in further detail, known implementation no longer describes in detail, to avoid there be unnecessary obscuring with content of the present invention.
A kind of Long Term Evolution LTE of the present invention system of systems frame number detection method has numerous embodiments, is described below respectively.
Execution mode 1: single radio frames detection system frame number scheme, flow process as shown in Figure 6, concrete steps comprise:
101) terminal receives the time-domain signal of first subframe on the radio frames.Time-domain signal is removed CP, and through the OFDM demodulation, then 72 subcarriers in center of front 4 OFDM symbols of slot# 1 are PBCH data and corresponding reference signal on this subframe.Then through separating resource unit mapping, channel estimating, input and QPSK demodulation step, obtain treating the data A of descrambling.For conventional CP, the length of data A is 480; For expansion CP, the length of data A is 432;
102) the scrambler sequence C of a TTI of generation, for conventional CP, the length of scrambler sequence C is 1920; For expansion CP, the length of scrambler sequence C is 1728.Scrambler sequence C is divided into 4 sections, is designated respectively C1, C2, C3 and C4.Every segment length all equals the length of data A.Then the data A that step 101 is obtained carries out descrambling with 4 sections scrambler sequence successively, obtains respectively data D1 behind the descrambling, D2, D3 and D4;
The scrambler sequence C of a TTI of described generation namely generates the identical scrambler sequence of scrambler sequence C with a TTI of transmitting terminal, and the generation method is to make the scrambler sequence initial value
Then the expression Cell Identity CI generates scrambler sequence C with reference to 7.2 joints among the 3GPP standard TS 36.211.
103) respectively with the data D1 behind the descrambling, D2, D3 and D4 do rate de-matching, preserve rate de-matching output data;
104) data behind the rate de-matching are done channel decoding;
105) data after the channel decoding are done CRC check, if there is any CRC check correct, then the high 8bit of System Frame Number obtains from MIB, the sequence number of the scrambler sequence that low 2bit adopts from step 102 obtains, thereby obtain System Frame Number, otherwise rebound step 101 repeats above process until arbitrary CRC check is correct;
Verification sequence is obtained by CRC check bit and the scrambling of CRC mask in the described CRC check step.Wherein, the CRC check bit is with reference to 5.1.1 joint among the 3GPP standard TS 36.212, and the CRC mask is with reference to showing 5.3.1.1-1 among the 3GPP standard TS 36.211.
The sequence number of the scrambler sequence that described low 2bit adopts from step 102 obtains, and under the correct prerequisite of CRC check, if the scrambler sequence that adopts in the 2nd step is C1, then to go out the low 2bit of System Frame Number of the radio frames of up-to-date reception be 00 in deducibility; If the scrambler sequence that adopts is C2, then the low 2bit of System Frame Number is 01; If the scrambler sequence that adopts is C3, then the low 2bit of System Frame Number is 10; If the scrambler sequence that adopts is C4, then the low 2bit of System Frame Number is 11;
Execution mode 2: adopt a plurality of radio frames to merge detection system frame number schemes, flow process as shown in Figure 7, concrete steps comprise:
201) terminal receives the time-domain signal of first subframe on the radio frames.Time-domain signal is removed CP, and through the OFDM demodulation, then 72 subcarriers in center of front 4 OFDM symbols of slot# 1 are PBCH data and corresponding reference signal on this subframe.Then through separating resource unit mapping, channel estimating, input and QPSK demodulation step, obtain treating the data A of descrambling.For conventional CP, the length of data A is 480; For expansion CP, the length of data A is 432;
202) the scrambler sequence C of a TTI of generation, for conventional CP, the length of scrambler sequence C is 1920; For expansion CP, the length of scrambler sequence C is 1728.Scrambler sequence C is divided into 4 sections, is designated respectively C1, C2, C3 and C4.Every segment length all equals the length of data A.Then the data A that step 201 is obtained carries out descrambling with 4 sections scrambler sequence successively, obtains respectively data D1 behind the descrambling, D2, D3 and D4;
203) respectively with the D1 behind the descrambling, D2, D3 and D4 data obtain and preserve rate de-matching output data E1 through the rate de-matching step, E2, E3 and E4, and determine whether to receive the PBCH data for the first time, if so, direct execution in step 204 then; Otherwise the rate de-matching output data that then need to preserve with the last time merge, and then execution in step 204;
Described rate de-matching output data with this preservation merge with last rate de-matching output data of preserving, as shown in Figure 8.The output of rate de-matching described in the step 203 data E1, E2, E3 and E4 are corresponding with corresponding rate de-matching output, the 3rd section rate de-matching that scrambler sequence is corresponding output and the 4th section rate de-matching that scrambler sequence the is corresponding output of corresponding rate de-matching output, the second segment scrambler sequence of first paragraph scrambler sequence respectively.During merging, the always rate de-matching output that the second segment scrambler sequence of this preservation is the corresponding rate de-matching output corresponding with the first paragraph scrambler sequence of preserving last time merges, the rate de-matching output that the 3rd section rate de-matching that scrambler sequence is corresponding output of this preservation is corresponding with the second segment scrambler sequence of preserving last time merges, the 4th section rate de-matching that scrambler sequence is corresponding output of this preservation is merged with the 3rd section rate de-matching that scrambler sequence the is corresponding output of preserving last time, and rate de-matching output corresponding to the first paragraph scrambler sequence of this preservation does not participate in merging; Addition after the two segment data contraposition weightings;
The coefficient of described weighting depends on the merging mode, and the merging mode can for selecting merging or equal gain combining or high specific merging etc., be enumerated no longer one by one.The modes such as described selection merging or equal gain combining or high specific merging are conventionally known to one of skill in the art, therefore, no longer describe in detail.
204) rate de-matching is exported data E1, E2, E3 and E4 are through channel decoding;
205) data after the channel decoding are done CRC check, if there is any CRC check correct, then the high 8bit of System Frame Number obtains from MIB, and the sequence number of the scrambler sequence that low 2bit adopts from step 202 obtains, thereby obtains System Frame Number, and flow process finishes; Otherwise, rebound step 201 then.Until CRC check is correct.
Execution mode 3: single radio frames merges with many radio frames and mixes detection system frame number scheme, and the specific implementation step comprises:
301) terminal receives the time-domain signal of first subframe on the radio frames.Time-domain signal is removed CP, and through the OFDM demodulation, then 72 subcarriers in center of front 4 OFDM symbols of slot# 1 are PBCH data and corresponding reference signal on this subframe.Then through separating resource unit mapping, channel estimating, input and QPSK demodulation step, obtain treating the data A of descrambling.For conventional CP, the length of data A is 480; For expansion CP, the length of data A is 432;
302) the scrambler sequence C of a TTI of generation, for conventional CP, the length of scrambler sequence C is 1920; For expansion CP, the length of scrambler sequence C is 1728.Scrambler sequence C is divided into 4 sections, is designated respectively C1, C2, C3 and C4.Every segment length all equals the length of data A.Then the data A that step 301 is obtained carries out descrambling with 4 sections scrambler sequence successively, obtains respectively data D1 behind the descrambling, D2, D3 and D4;
303) respectively with the D1 behind the descrambling, D2, D3 and D4 data obtain and preserve rate de-matching output data E1, E2, E3 and E4 through the rate de-matching step;
304) rate de-matching is exported data through channel decoding;
305) data after the channel decoding are done CRC check, if there is any CRC check correct, then the high 8bit of System Frame Number obtains from MIB, and the sequence number of the scrambler sequence that low 2bit adopts from step 302 obtains, thereby obtains System Frame Number, and flow process finishes; Otherwise continue execution in step 306;
306) determine whether for the first time to receive the PBCH data, if so, rebound step 301 then; Otherwise, the rate de-matching output data E1 that then step 303 is preserved, E2, E3 and E4 export data with the rate de-matching of last time preservation respectively and merge, and obtain e1, e2, e3 and e4;
307) the data e1 after will merging, e2, e3 and e4 pass through respectively channel decoding;
308) data after the channel decoding are done CRC check, if there is any CRC check correct, then the high 8bit of System Frame Number obtains from MIB, and the sequence number of the scrambler sequence that low 2bit adopts from step 302 obtains, thereby obtains System Frame Number.Otherwise rebound step 301 is until there is any CRC check correct.
In order to realize above purpose, the present invention also provides a kind of LTE system of systems frame number checkout gear, as shown in Figure 9.LTE system of systems frame number checkout gear of the present invention comprises:
Receiver module 10 for the time-domain signal that receives first first subframe on the radio frames, perhaps receives the time-domain signal of first subframe on the radio frames again according to the judgement indication of judging module 30.
Signal processing module 20, time-domain signal according to first subframe on the radio frames of receiver module 10 outputs, finish PBCH receiving end signal handling process, comprise that further removing CP unit 201, OFDM demodulating unit 202, solution resource mapping unit 203, channel estimating unit 204, detecting signal unit 205 and QPSK demodulating unit 206, scrambler generates and descrambling unit 207, rate de-matching unit 208, channel decoding unit 209 and CRC check unit 210, as shown in figure 10.
Preferably, described signal processing module 20 further comprises:
PBCH counting unit 220, the PBCH counting also determines whether to receive for the first time the PBCH data;
Data merge cells 230 adopts and selects merging or the modes such as equal gain combining or high specific merging that rate de-matching output data are merged;
Data merge cells 230 determines whether work according to PBCH counting unit 220 judged results, if being judged as, PBCH counting unit 220 receives the PBCH data for the first time, then data merge cells 230 is not worked, data are directly passed to channel decoding unit 209, otherwise data pass to channel decoding unit 209 after data merge cells 230 is processed.
Judging module 30, CRC check result according to signal processing module 20 judges whether to finish, if described CRC check unit judges has any CRC check correct, then the high 8bit of System Frame Number obtains from MIB, the sequence number of the scrambler sequence that low 2bit adopts from step B obtains, thereby obtains System Frame Number; Otherwise indication receiver module 10 receives the time-domain signal of first subframe on the radio frames again.
The present invention has carried out further detailed description for execution mode or embodiment to the purpose, technical solutions and advantages of the present invention; institute is understood that; above only is preferred implementation of the present invention for execution mode or embodiment; not in order to limit the present invention; all any modifications of within the spirit and principles in the present invention the present invention being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a Long Term Evolution LTE system of systems frame number detection method is characterized in that, comprising:
Steps A: terminal receives the time-domain signal of first subframe on the radio frames, adopts the signal processing with the transmitting terminal contrary, obtains treating the Physical Broadcast Channel PBCH data A of descrambling;
Step B: generate the identical scrambler sequence C of scrambler sequence with a TTI of transmitting terminal, scrambler sequence C is divided into 4 sections, every segment length equals the length of data A, and data A is carried out descrambling with 4 sections scrambler sequence successively, obtains respectively data behind 4 parts of descramblings;
Step C: respectively the data behind 4 parts of descramblings are done rate de-matching, preserve rate de-matching output data;
Step D: the data behind the rate de-matching are done channel decoding;
Step e: channel decoding output data are done the cyclic redundancy CRC check, if there is any CRC check correct, then obtain System Frame Number, flow process finishes; Otherwise, go back to steps A, repeat above process until arbitrary CRC check is correct.
2. LTE system of systems frame number detection method as claimed in claim 1 is characterized in that, after described step C preserves rate de-matching output data, determine whether to receive the PBCH data for the first time, if so, direct execution in step D then; Otherwise the rate de-matching output data of preserving with the last time merge rear execution in step D.
3. LTE system of systems frame number detection method as claimed in claim 1, it is characterized in that, if all CRC check of described step e are failure all, then determine whether to receive for the first time the PBCH data, if, then forward steps A to, otherwise, the rate de-matching output data of step C preservation are exported data with the rate de-matching of last time preservation respectively merge rear execution in step D.
4. such as LTE system of systems frame number detection method as described in claim 2 or 3, it is characterized in that, described data are merged into the rate de-matching output that the second segment scrambler sequence of this preservation is the corresponding rate de-matching output corresponding with the first paragraph scrambler sequence of preserving last time and are merged, the rate de-matching output that the 3rd section rate de-matching that scrambler sequence is corresponding output of this preservation is corresponding with the second segment scrambler sequence of preserving last time merges, the 4th section rate de-matching that scrambler sequence is corresponding output of this preservation is merged with the 3rd section rate de-matching that scrambler sequence the is corresponding output of preserving last time, and rate de-matching output corresponding to the first paragraph scrambler sequence of this preservation does not participate in merging; Addition after the two segment data contraposition weightings.
5. LTE system of systems frame number detection method as claimed in claim 4 is characterized in that the coefficient of described weighting depends on the merging mode, and the merging mode adopts selects merging or equal gain combining or high specific to merge mode.
6. a Long Term Evolution LTE system of systems frame number checkout gear is characterized in that, comprising:
Receiver module (10) for the time-domain signal that receives first first subframe on the radio frames, perhaps receives the time-domain signal of first subframe on the radio frames again according to the judgement indication of judging module (30);
Signal processing module (20), be used for the time-domain signal according to first subframe on the radio frames of receiver module (10) output, finish the PBCH receiving end signal and process, described signal processing module (20) further comprise remove cyclic prefix CP unit (201), OFDM demodulating unit (202), separate resource mapping unit (203), channel estimating unit (204), detecting signal unit (205), QPSK demodulating unit (206) and
Scrambler generates and descrambling unit (207), scrambler sequence is divided into 4 sections, every segment length equals the length of data A, data A is carried out descrambling with 4 sections scrambler sequence successively, obtain respectively 4 parts of data behind the descrambling, wherein, data A is the time-domain signal with first subframe on the radio frames of terminal reception, the signal processing of employing and transmitting terminal contrary, the resulting Physical Broadcast Channel PBCH data for the treatment of descrambling;
Rate de-matching is done with the data behind 4 parts of descramblings respectively in rate de-matching unit (208), preserves rate de-matching output data;
Channel decoding unit (209) carries out channel decoding to 4 parts of rate de-matching output data respectively;
CRC check unit (210); Respectively data after 4 parts of channel decodings are done CRC check;
Judging module (30), CRC check result according to signal processing module (20) judges whether to finish, if described CRC check unit judges has any CRC check correct, then the high 8bit of System Frame Number obtains from the Master Information Block MIB of system message, low 2bit obtains from the sequence number of the scrambler sequence of employing, thereby obtains System Frame Number; Otherwise indication receiver module (10) receives the time-domain signal of first subframe on the radio frames again, and the scrambler sequence of described scrambler sequence and a TTI of transmitting terminal is identical.
7. LTE system of systems frame number checkout gear as claimed in claim 6 is characterized in that described signal processing module (20) further comprises:
PBCH counting unit (220), the PBCH counting also determines whether to receive for the first time the PBCH data;
Data merge cells (230) adopts and selects merging or equal gain combining or high specific merging mode that rate de-matching output data are merged;
Data merge cells (230) determines whether work according to PBCH counting unit (220) judged result, if being judged as, PBCH counting unit (220) receives the PBCH data for the first time, then data merge cells (230) is not worked, data are directly passed to channel decoding unit (209), otherwise data merge cells (230) passes to channel decoding unit (209) after these rate de-matching output data and last rate de-matching output data of preserving are merged.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3580977A4 (en) * | 2017-02-07 | 2021-04-14 | Innovative Technology Lab Co., Ltd. | Method and apparatus for broadcast channel configuration and broadcast channel transmission and reception for communication system |
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| CN109586847B (en) * | 2018-12-05 | 2020-08-07 | 北京邮电大学 | Method for combining multiple different transmission blocks |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132605A (en) * | 2006-08-21 | 2008-02-27 | 北京三星通信技术研究有限公司 | Paging signal channel soft combination receiving method and device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005086509A1 (en) * | 2004-03-04 | 2005-09-15 | Utstarcom Telecom Co., Ltd | The loads supporting mehod and system in radio base station |
-
2010
- 2010-09-30 CN CN 201010500196 patent/CN102271023B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132605A (en) * | 2006-08-21 | 2008-02-27 | 北京三星通信技术研究有限公司 | Paging signal channel soft combination receiving method and device thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3580977A4 (en) * | 2017-02-07 | 2021-04-14 | Innovative Technology Lab Co., Ltd. | Method and apparatus for broadcast channel configuration and broadcast channel transmission and reception for communication system |
| EP4152675A1 (en) * | 2017-02-07 | 2023-03-22 | Innovative Technology Lab Co., Ltd. | Method and apparatus for broadcast channel configuration and broadccast channel transmission and reception for communication system |
| US11800466B2 (en) | 2017-02-07 | 2023-10-24 | Innovative Technology Lab Co., Ltd. | Method and apparatus for broadcast channel configuration and broadcast channel transmission and reception for communication system |
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