CN105828363A - Narrow-band wireless digital communication time-slot alignment method and device - Google Patents
Narrow-band wireless digital communication time-slot alignment method and device Download PDFInfo
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- CN105828363A CN105828363A CN201610194556.8A CN201610194556A CN105828363A CN 105828363 A CN105828363 A CN 105828363A CN 201610194556 A CN201610194556 A CN 201610194556A CN 105828363 A CN105828363 A CN 105828363A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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Abstract
The present invention relates to a narrow-band wireless digital communication time-slot alignment method and device. The method comprises: receiving a plurality of access channel type bits through a plurality of continuous downlink time slots, and forming a time slot value sequence according to the a plurality of received access channel type bits; arranging a first presetting sequence and a second presetting sequence, wherein the downlink time slot of the first presetting sequence alignment is a first time slot, and the downlink time slot of the second presetting sequence alignment is a second time slot; and comparing the time slot sequence with the first presetting sequence and the second presetting sequence to obtain a first syndrome and a second syndrome, wherein when the weight of the first syndrome is smaller than the weight of the second syndrome, setting the current downlink time slot to be the first time slot, and when the weight of the first syndrome is larger than the weight of the second syndrome, setting the current downlink time slot to be the second time slot. The narrow-band wireless digital communication time-slot alignment method and device are configured to compare the time slot value sequence with the first presetting sequence and the second presetting sequence to determine the time slot of the downlink time slot alignment so as to effectively improve the accuracy of the time slot alignment.
Description
Technical field
The present invention relates to arrowband radio digital communication technical field, the method and apparatus particularly relating to arrowband radio digital communication time slot alignment.
Background technology
At DMR (DigitalMobileRadio, digital mobile radio)/PDT (ProfessionalDigitalTrunking, Digital Clustering) in digital mobile communication system, use the TDMA (Timedivisionmultipleaccess of two time slots, time division multiple acess) mode, and radio-frequency carrier bandwidth is FDMA (Frequencydivisionmultipleaccess, the frequency division multiple access) technology of 12.5kHz.Owing to using two time slots, in order to avoid interfering with each other of two time slots, the alignment of time slot just seems the most important.
In digital communication, up referring to the signal transmission by mobile station to base station, the descending signal that refers to is transmitted by from base station to mobile station.The sequential relationship of ascending time slot and descending time slot can be that on the time, alignment (alignment channel) can also be non-aligned (biasing Channel).For alignment channel, as it is shown in figure 1, by TDMA mode so that up channel and down channel are divided into the logic channel of two time slots: logic channel 1 and logic channel 2.Therefore when BTS channel sequential is directed at when, on logic channel 1, mobile station receives signal on descending time slot 1, sends signal on ascending time slot 2.On logic channel 2, mobile station receives signal on descending time slot 2, sends signal on ascending time slot 1.
The alignment of ascending time slot and descending time slot is that the CACH (common broadcast channel) by descending time slot realizes, and the burst of each common broadcast channel indicates the timeslot number of the uplink burst of ensuing downlink burst and one time slot of delay.In 24 that each CACH happens suddenly, comprise 4 message digits and 3 parity bits determine frame and state, these positions are called time division multiple acess and access channel type (TACT) position, TACT comprises the TC (slot values) of, TC be 1 this descending time slot of expression be time slot 2, TC be 0 this descending time slot of expression be time slot 1.And TC is encrypted protection when sending, in the case of signal quality is the best, mobile station can be correctly decoded out the value of TC by decoding；If receiving continuously multiple CACH, thus obtaining multiple continuous print TC value, thus can be alignd descending time slot 2 or descending time slot 1 by this continuous T C value.If but in the case of signal quality is poor, the TC value decoding out by code is not necessarily right-on, it is possible to the situation that can snap to another one time slot when there will be ascending time slot alignment descending time slot occurs.
Summary of the invention
Based on this, it is necessary that the slot values easily causing decoding to obtain due to poor signal quality for existing arrowband radio digital communication is made mistakes, cause the defect that uplink and downlink timeslot cannot align, it is provided that one is prevented effectively from slot values and makes mistakes, the method being effectively improved the accuracy of time slot alignment.
A kind of method of arrowband radio digital communication time slot alignment, including:
Received several by several descending time slots continuously and access channel type position, by reception order, described several are accessed channel type position and form slot values sequence；
First predetermined sequence and the second predetermined sequence are set, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively acquisition the first syndrome and the second syndrome, when the weight of described first syndrome is less than the weight of described second syndrome, current downlink time slot is set to the first time slot, when the weight of described first syndrome is more than the weight of described second syndrome, current downlink time slot is set to the second time slot.
In one embodiment, described described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively obtain the first syndrome and the second syndrome step particularly as follows:
By described slot values sequence, each carries out XOR one by one with each of described first predetermined sequence and described second predetermined sequence respectively and obtains the first syndrome and the second syndrome.
In one embodiment, in the described step that described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively acquisition the first syndrome and the second syndrome, when the weight of described first syndrome is equal to the weight of described second syndrome, maintain current downlink time slot.
In one embodiment, described received several by continuously several descending time slots and access channel type position, by reception order, steps of several access channel type position composition slot values sequences described are specially by continuous at least four descending time slot reception at least four access channel type position, by reception order by described at least four access channel type position composition slot values sequence.
In one embodiment, described the first predetermined sequence and the second predetermined sequence of arranging, described first predetermined sequence and described second predetermined sequence all have with described slot values sequence identical figure place step particularly as follows:
First predetermined sequence and the second predetermined sequence are set, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Described first predetermined sequence and described second predetermined sequence are made respectively Hamming code decoding.
A kind of device of arrowband radio digital communication time slot alignment, including:
Slot values sequence generating module, accesses channel type position for being received several by several descending time slots continuously, by reception order, described several is accessed channel type position and forms slot values sequence；
Predetermined sequence module is set, for arranging the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Contrast module, for described slot values sequence to be compared respectively acquisition the first syndrome and the second syndrome with described first predetermined sequence and described second predetermined sequence, when the weight of described first syndrome is less than the weight of described second syndrome, current downlink time slot is set to the first time slot, when the weight of described first syndrome is more than the weight of described second syndrome, current downlink time slot is set to the second time slot.
In one embodiment, described contrast module includes XOR submodule,
Described XOR submodule is for by described slot values sequence, each carries out XOR one by one with each of described first predetermined sequence and described second predetermined sequence respectively and obtains the first syndrome and the second syndrome.
In one embodiment, described contrast module also includes maintaining time slot submodule, when described maintenance time slot submodule for being equal to the weight of described second syndrome when the weight of described first syndrome, maintains current downlink time slot.
In one embodiment, described slot values sequence generating module is specifically additionally operable to be received at least four by continuous at least four descending time slot and accesses channel type position, by reception order, described at least four is accessed channel type position and forms slot values sequence.
In one embodiment, the described predetermined sequence module that arranges also includes arranging sequence submodule and decoding sub-module；
The described sequence submodule that arranges is for arranging the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Described decoding sub-module for making Hamming code decoding respectively to described first predetermined sequence and described second predetermined sequence.
The method and apparatus of above-mentioned arrowband radio digital communication time slot alignment, by comparing receiving descending time slot acquisition slot values sequence continuously with the first predetermined sequence and the second predetermined sequence respectively, thus judge the time slot that descending time slot aligns, it is prevented effectively from slot values to make mistakes, and is effectively improved the accuracy of time slot alignment.
Accompanying drawing explanation
Fig. 1 is the logic channel schematic diagram of the arrowband radio digital communication of a preferred embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the method for the arrowband radio digital communication time slot alignment of a preferred embodiment of the present invention；
Fig. 3 is the functional block diagram of the device of the arrowband radio digital communication time slot alignment of a preferred embodiment of the present invention；
Fig. 4 is the functional block diagram of the contrast module of a preferred embodiment of the present invention；
Fig. 5 is the functional block diagram arranging predetermined sequence module of a preferred embodiment of the present invention；
Fig. 6 is the implementing procedure figure of a preferred embodiment of the present invention.
Detailed description of the invention
For the ease of understanding the present invention, below with reference to relevant drawings, the present invention is described more fully.Accompanying drawing gives presently preferred embodiments of the present invention.But, the present invention can realize in many different forms, however it is not limited to embodiment described herein.On the contrary, providing the purpose of these embodiments is to make the understanding to the disclosure more thorough comprehensively.
In one embodiment, as in figure 2 it is shown, the method for a kind of arrowband radio digital communication time slot alignment, comprise the following steps:
Step S100, is received several by several descending time slots continuously and accesses channel type position, by reception order, described several is accessed channel type position and forms slot values sequence.
In this step, mobile station receives the signal of several descending time slots continuously, read the common broadcast channel in descending time slot, channel type position is accessed by the acquisition in this common broadcast channel, described access channel type position comprises a digit time slot value, these is accessed channel type position by the order composition slot values sequence obtained.
As shown in table 1,4 message digits accessing channel type position include following information unit:
Table 1 accesses the information unit of channel type position
Wherein, TC is slot values, and slot values is 0, then this descending time slot is time slot 1, and slot values is 1, then this descending time slot is time slot 2.
Step S200, first predetermined sequence and the second predetermined sequence are set, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot.
Described first predetermined sequence and described second predetermined sequence are respectively used to be aligned in described first time slot and described second time slot, described first predetermined sequence and described second predetermined sequence are accessed channel type position by several respectively and form, it is respectively used to simulate and is aligned in the slot values sequence of the first time slot and simulates the slot values sequence being aligned in the second time slot, such as, slot values in the slot values sequence receiving composition is set to first time slot that aligns, thus obtain described first predetermined sequence, slot values in the slot values sequence receiving composition is set to second time slot that aligns, thus obtain described second predetermined sequence.
Such as, the descending time slot of described first predetermined sequence alignment is the first time slot, the descending time slot of described second predetermined sequence alignment is the second time slot, such as, described first predetermined sequence comprises multiple slot values, first slot values that its order is arranged is 0, the descending time slot of the most described first predetermined sequence alignment is the first time slot, and for example, described first predetermined sequence comprises multiple slot values, first slot values that its order is arranged is 1, and the descending time slot of the most described first predetermined sequence alignment is the second time slot.
In one embodiment, step S200 specifically includes:
Step S201, first predetermined sequence and the second predetermined sequence are set, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot.
Step S202, makees Hamming code decoding respectively to described first predetermined sequence and described second predetermined sequence.
Hamming code is a kind of FEC (ForwardErrorCorrection, forward error correction) code, can effectively verify the mistake that data stream occurs in the transmission, data communication credibility can be effectively increased, such as, Hamming code in the present invention is Hamming (7,4) FEC, it should be understood that Hamming code includes a lot of various combination, Hamming (7,4) FEC be the earliest, be also simplest one, it can only correct 1 bit-errors, and therefore error correcting capability is the strongest, when signal difference, may bit error rate can increase after decoding.Its object is to correct the mistake that described slot values sequence occurs in transmitting procedure, in the present embodiment, after being provided with the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence are decoded by Hamming code respectively, thus obtain decoded described first predetermined sequence and described second predetermined sequence, make described first predetermined sequence and described second predetermined sequence reliability higher, in order to comparing result in the next step is the most accurate.
Step S300, described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively acquisition the first syndrome and the second syndrome, when the weight of described first syndrome is less than the weight of described second syndrome, current downlink time slot is set to the first time slot, when the weight of described first syndrome is more than the weight of described second syndrome, current downlink time slot is set to the second time slot.
Such as, it is alignment channel that the present invention is applied to the alignment channel of time upper alignment, the i.e. sequential relationship of up channel and down channel, and such as, described first time slot is the first channel, and described second time slot is second channel.
It should be understood that, poor at signal quality or in the case of being disturbed, the slot values sequence received in descending time slot is likely to occur mistake, in order to judge and obtain the result that the slot values sequence after makeing mistakes is relatively accurate, in one embodiment, by described slot values sequence, each carries out XOR one by one with each of described first predetermined sequence and described second predetermined sequence respectively and obtains the first syndrome and the second syndrome, described first syndrome is the result that described slot values sequence and described first predetermined sequence make to carry out XOR, the weight of described first syndrome is that in described first syndrome, result is the number of " 1 ", result is that the weight of the most described first syndrome of number of " 1 " is the biggest；Described second syndrome is the result that described slot values sequence and described second predetermined sequence make to carry out XOR, the weight of described second syndrome is that in described second syndrome, result is the number of " 1 ", and result is that the weight of the most described second syndrome of number of " 1 " is the biggest.
When the weight of described first syndrome is less than the weight of described second syndrome, difference between the most described slot values sequence and described first predetermined sequence is less than the difference of described slot values sequence with described second predetermined sequence, the most comparatively speaking, described slot values sequence alignment is bigger in the probability of the first time slot, then current downlink time slot is set to the first time slot, even if obtaining current downlink time slot to be aligned in the first time slot；Otherwise, when the weight of described first syndrome is more than the weight of described second syndrome, difference between the most described slot values sequence and described second predetermined sequence is less than the difference of described slot values sequence with described first predetermined sequence, then current downlink time slot is set to the second time slot so that current downlink time slot is aligned in the second time slot.
In one embodiment, in step S300, when the weight of described first syndrome is equal to the weight of described second syndrome, maintain current downlink time slot.
It should be understood that, in the continuous communication process of mobile station and base station, base station has current descending time slot, such as, it is aligned in the first time slot, or it is aligned in the second time slot, when the weight of described first syndrome is equal to the weight of described second syndrome, show that the most described slot values sequence difference with the first predetermined sequence is equal to described slot values sequence and the difference of described second predetermined sequence, it is equal with the probability being aligned in the second time slot that current downlink time slot is aligned in the first time slot, then maintain current downlink time slot.Such as, before mobile station receives multiple descending time slot continuously, the descending time slot of base station is aligned in the first time slot, after receiving multiple descending time slots continuously, and the weight of described first syndrome is equal to the weight of described second syndrome, then mobile station maintains current downlink time slot, is still aligned in the first time slot.
In order to while improving time slot alignment rate, improving the efficiency of time slot alignment, in one embodiment, step S100 is specially, received at least four by continuous at least four descending time slot and access channel type position, by reception order, described at least four is accessed channel type position and form slot values sequence.
Specifically, after receiving three descending time slots continuously, by carrying out XOR with the first predetermined sequence or the second predetermined sequence, owing to figure place is less, cause carrying out XOR result difference little, so, it is not easy to judge the deviation of slot values sequence, the accuracy so making described time slot align declines, three descending time slots are accurately to judge that the credibility of current descending time slot result is relatively low, therefore, in order to improve the credibility judging current descending time slot result, the length of described slot values sequence is at least four.
Along with the length of slot values sequence increases, the difference of the first syndrome and the second syndrome that carry out the result of XOR increases the most therewith, but reduce the efficiency of time slot alignment, owing to slot values sequence length increases, it is necessarily required to receive more descending time slot, so, when time slot alignment makes a mistake, then can not correct in time, so will cause the FER increase that communicates.Therefore, in order to improve the accuracy of time slot alignment, and improve time slot alignment efficiency, in the present embodiment, step S100 accesses channel type position specifically, received four by continuous four descending time slots, accesses channel type position by reception order by described four and forms slot values sequence.
In one embodiment, arranging the first predetermined sequence is 0101, second predetermined sequence is 1010, first predetermined sequence is aligned in the first time slot, second predetermined sequence is aligned in the second time slot, second mobile station receives four descending time slots continuously, obtain slot values sequence 1010, make to carry out XOR with the first predetermined sequence and the second predetermined sequence respectively by slot values sequence, obtaining result is 1111 and 0000, the weight of the i.e. first syndrome is 4, the weight of the second syndrome is 0, weight due to the first syndrome is more than the weight of the second syndrome, then show that current downlink time slot is aligned in the accuracy of described second time slot higher, therefore descending time slot is aligned in the second time slot.
Assume owing to communication signal quality is poor, the slot values received is caused to make a mistake, such as, it is 0100 that decoding obtains slot values sequence, then make to carry out XOR with the first predetermined sequence and the second predetermined sequence respectively by slot values sequence, the weight of the first syndrome obtained is 1, the weight of the second syndrome obtained is 3, the weight of the first syndrome is less than the weight of the second syndrome, slot values sequence before not makeing mistakes is closer to described first predetermined sequence, the probability that current downlink time slot is aligned in the first time slot is higher, i.e. actual slot values sequence should be 0101 equal to the first predetermined sequence, therefore descending time slot is aligned in the first time slot.
In one embodiment, as shown in Figure 6, the step that is embodied as of the present invention includes:
Step 1, after continuously receiving 4 CACH, TC value is { 0,1,0,1} or { entrance step 2 when 1,0,1,0}.
Step 2, assume that terminal is alignment time slot 1, the TC position of the data stream S before being encrypted by Hamming code is set to the numerical value of alignment time slot 1, after producing new data stream, after Hamming code decodes, obtain data stream A, the data of data stream A are obtained different amount of bits N with data stream S again after XOR compares.
Step 3, assume that terminal is alignment time slot 2, the TC position forcing the data stream S before being encrypted by Hamming code is set to the numerical value of alignment time slot 2, after producing new TACT data stream, after Hamming code decodes, obtain data stream B, the data of data stream B are obtained different amount of bits M with data stream S again after XOR compares.
Step 4, it is judged that whether N is less than M, if the probability of N<M explanation alignment time slot 1 is big, the probability of N>M explanation alignment time slot 2 is big.If alignment is time slot 1 step 1 when, then if now N no more than M just explanation time slot alignment is relatively accurate, if N is relatively inaccurate more than M just explanation time slot alignment, it is impossible to use.If alignment is time slot 2 step 1 when, then if now M no more than N just explanation time slot alignment is relatively accurate, if M is relatively inaccurate more than N just explanation time slot alignment, it is impossible to use.
As it is shown on figure 3, the device of the arrowband radio digital communication time slot alignment of a preferred embodiment, including: slot values sequence generating module 210, predetermined sequence module 220 and contrast module 230 are set；
Described slot values sequence generating module 210 accesses channel type position for being received several by several descending time slots continuously, by reception order, described several is accessed channel type position and forms slot values sequence.
The described predetermined sequence module 220 that arranges is for arranging the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot.
Described contrast module 230 for comparing acquisition the first syndrome and the second syndrome respectively by described slot values sequence with described first predetermined sequence and described second predetermined sequence, when the weight of described first syndrome is less than the weight of described second syndrome, current downlink time slot is set to the first time slot, when the weight of described first syndrome is more than the weight of described second syndrome, current downlink time slot is set to the second time slot.
In one embodiment, refer to Fig. 4, described contrast module 230 includes XOR submodule 231, and described XOR submodule 231 is for by described slot values sequence, each carries out XOR one by one with each of described first predetermined sequence and described second predetermined sequence respectively and obtains the first syndrome and the second syndrome.
In one embodiment, referring again to Fig. 4, described contrast module 230 also includes maintaining time slot submodule 232, when described maintenance time slot submodule for being equal to the weight of described second syndrome when the weight of described first syndrome, maintains current downlink time slot.
In one embodiment, described slot values sequence generating module 210 is specifically additionally operable to be received at least four by continuous at least four descending time slot and accesses channel type position, by reception order, described at least four is accessed channel type position and forms slot values sequence.
In one embodiment, as it is shown in figure 5, the described predetermined sequence module 220 that arranges also includes arranging sequence submodule 221 and decoding sub-module 222.
The described sequence submodule 221 that arranges is for arranging the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot.
Described decoding sub-module 222 for making Hamming code decoding respectively to described first predetermined sequence and described second predetermined sequence.
Should be noted that in said system embodiment, included modules is to carry out dividing according to function logic, but is not limited to above-mentioned division, as long as being capable of corresponding function；It addition, the specific name of each functional module is also only to facilitate mutually distinguish, it is not limited to protection scope of the present invention.
It addition, one of ordinary skill in the art will appreciate that all or part of step realizing in the various embodiments described above method can be by program and completes to instruct relevant hardware, corresponding program can be stored in read/write memory medium.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. the method for an arrowband radio digital communication time slot alignment, it is characterised in that including:
Received several by several descending time slots continuously and access channel type position, by reception order, described several are accessed channel type position and form slot values sequence；
First predetermined sequence and the second predetermined sequence are set, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively acquisition the first syndrome and the second syndrome, when the weight of described first syndrome is less than the weight of described second syndrome, current downlink time slot is set to the first time slot, when the weight of described first syndrome is more than the weight of described second syndrome, current downlink time slot is set to the second time slot.
The method of arrowband the most according to claim 1 radio digital communication time slot alignment, it is characterized in that, described described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively obtain the first syndrome and the second syndrome step particularly as follows:
By described slot values sequence, each carries out XOR one by one with each of described first predetermined sequence and described second predetermined sequence respectively and obtains the first syndrome and the second syndrome.
The method of arrowband the most according to claim 1 radio digital communication time slot alignment, it is characterized in that, in the described step that described slot values sequence is compared with described first predetermined sequence and described second predetermined sequence respectively acquisition the first syndrome and the second syndrome, when the weight of described first syndrome is equal to the weight of described second syndrome, maintain current downlink time slot.
The method of arrowband the most according to claim 1 radio digital communication time slot alignment, it is characterized in that, described received several by continuously several descending time slots and access channel type position, by reception order, steps of several access channel type position composition slot values sequences described are specially by continuous at least four descending time slot reception at least four access channel type position, by reception order by described at least four access channel type position composition slot values sequence.
The method of arrowband the most according to claim 1 radio digital communication time slot alignment, it is characterized in that, described the first predetermined sequence and the second predetermined sequence of arranging, described first predetermined sequence and described second predetermined sequence all have with described slot values sequence identical figure place step particularly as follows:
First predetermined sequence and the second predetermined sequence are set, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Described first predetermined sequence and described second predetermined sequence are made respectively Hamming code decoding.
6. the device of an arrowband radio digital communication time slot alignment, it is characterised in that including:
Slot values sequence generating module, accesses channel type position for being received several by several descending time slots continuously, by reception order, described several is accessed channel type position and forms slot values sequence；
Predetermined sequence module is set, for arranging the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Contrast module, for described slot values sequence to be compared respectively acquisition the first syndrome and the second syndrome with described first predetermined sequence and described second predetermined sequence, when the weight of described first syndrome is less than the weight of described second syndrome, current downlink time slot is set to the first time slot, when the weight of described first syndrome is more than the weight of described second syndrome, current downlink time slot is set to the second time slot.
The device of arrowband the most according to claim 6 radio digital communication time slot alignment, it is characterised in that described contrast module includes XOR submodule,
Described XOR submodule is for by described slot values sequence, each carries out XOR one by one with each of described first predetermined sequence and described second predetermined sequence respectively and obtains the first syndrome and the second syndrome.
The device of arrowband the most according to claim 6 radio digital communication time slot alignment, it is characterized in that, described contrast module also includes maintaining time slot submodule, when described maintenance time slot submodule for being equal to the weight of described second syndrome when the weight of described first syndrome, maintain current downlink time slot.
The device of arrowband the most according to claim 6 radio digital communication time slot alignment, it is characterized in that, described slot values sequence generating module is specifically additionally operable to be received at least four by continuous at least four descending time slot and accesses channel type position, by reception order, described at least four is accessed channel type position and forms slot values sequence.
The device of arrowband the most according to claim 6 radio digital communication time slot alignment, it is characterised in that the described predetermined sequence module that arranges also includes arranging sequence submodule and decoding sub-module；
The described sequence submodule that arranges is for arranging the first predetermined sequence and the second predetermined sequence, described first predetermined sequence and described second predetermined sequence all have identical figure place with described slot values sequence, the descending time slot of described first predetermined sequence alignment is the first time slot, and the descending time slot of described second predetermined sequence alignment is the second time slot；
Described decoding sub-module for making Hamming code decoding respectively to described first predetermined sequence and described second predetermined sequence.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111431576A (en) * | 2020-05-14 | 2020-07-17 | 上海道生物联技术有限公司 | Time division duplex communication system and method |
| CN111459457A (en) * | 2020-03-18 | 2020-07-28 | 支付宝(杭州)信息技术有限公司 | Data checking method and device and computer equipment |
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| CN105828363B (en) | 2020-04-21 |
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