CN116346565B - Method for deleting filling bit, terminal equipment and storage medium - Google Patents

Method for deleting filling bit, terminal equipment and storage medium Download PDF

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Publication number
CN116346565B
CN116346565B CN202310629850.7A CN202310629850A CN116346565B CN 116346565 B CN116346565 B CN 116346565B CN 202310629850 A CN202310629850 A CN 202310629850A CN 116346565 B CN116346565 B CN 116346565B
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type
symbols
symbol
bits
determining
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CN116346565A (en
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李晓亮
刘大可
郝鹏
吴泽楠
杨瑛
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Polar Core Communication Technology Xi'an Co ltd
Jixin Communication Technology Nanjing Co ltd
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Polar Core Communication Technology Xi'an Co ltd
Jixin Communication Technology Nanjing Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to the technical field of communication, and provides a method for deleting filling bits, terminal equipment and a storage medium, wherein the method comprises the following steps: acquiring configuration information of a data packet and carrying an orthogonal frequency division multiplexing symbol of the data packet; identifying target symbols with filling bits in the orthogonal frequency division multiplexing symbols according to the configuration information, wherein the target symbols comprise first type symbols with filling bits of a first type and/or second type symbols with filling bits of a second type; and deleting the filling bits in the target symbol. The processing flows of different depacketizing modules of the receiving end can be combined and processed by uniformly identifying and deleting filling bits filled based on different purposes in the orthogonal frequency division multiplexing symbol, repeated transmission of configuration parameters among different modules of the receiving end is avoided, processing time of bit-level modules of the receiving end is saved, link processing time delay in a data packet transmission process is effectively reduced, and further transmission efficiency of the data packet can be improved.

Description

Method for deleting filling bit, terminal equipment and storage medium
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for deleting a padding bit, a terminal device, and a storage medium.
Background
With the development of communication technology, the 802.11ax protocol is increasingly widely applied in the field of wireless communication, and for the problem that the bit numbers before and after the orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) symbol coding cannot be aligned, the protocol specifies that a transmitting terminal needs to perform bit filling, so as to adapt to the coding rate. In order to restore the original bits, the receiving terminal needs to perform a deletion operation of the filling bits on each OFDM symbol mapped with the filling bits according to the parameter configuration of the data packet, that is, delete the invalid bits filled by the transmitting terminal.
When the receiving end deletes the filling bit, different modules are preset in the receiving end to perform the de-filling processing due to different filling positions of the filling bit and/or different filling purposes, so that different positions in the OFDM symbol are deleted and/or invalid bits filled based on different purposes are deleted. For example, when the code is to be unpopulated, all OFDM symbols occupied by the current data packet need to be determined according to the configuration parameters of the data packet, and the OFDM symbol with the padding bits is determined to be present, so that the padding bits are deleted on the determined OFDM symbol. In the subsequent bit level processing, the post-forward error correction code de-padding process also needs to determine the OFDM symbol with the padding bits and perform the padding bit deletion processing on the OFDM symbol with the padding bits. The repeated judgment of the filling bit by the receiving end easily causes obvious link processing time delay and affects the transmission efficiency of the data packet.
Disclosure of Invention
The invention provides a method for deleting filling bits, terminal equipment and a storage medium, which are used for solving the defect that in the prior art, when the filling bits are deleted, repeated judgment is needed to be carried out on the filling bits, so that obvious link processing time delay is caused, the transmission efficiency of a data packet is influenced, the link processing time delay can be reduced, and the transmission efficiency of the data packet is improved.
The invention provides a method for deleting filling bits, which comprises the following steps:
acquiring configuration information of a data packet and carrying an orthogonal frequency division multiplexing symbol of the data packet;
identifying a target symbol with filling bits in the OFDM symbol according to the configuration information;
deleting the filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
According to the method for deleting the filling bit provided by the invention, the method for identifying the target symbol with the filling bit in the orthogonal frequency division multiplexing symbol according to the configuration information comprises the following steps:
Determining the number and the positions of target symbols with filling bits in the OFDM symbols according to the configuration information;
and identifying the target symbols from the orthogonal frequency division multiplexing symbols according to the number and the positions of the target symbols.
According to the method for deleting the filling bit provided by the invention, the method for determining the number and the positions of the target symbols with the filling bit in the OFDM symbols according to the configuration information comprises the following steps:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is enabled and the space-time block code is not enabled STBC =1；
If N CBPS_LAST And N CBPS Equality, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM ；
If N CBPS_LAST And N CBPS Unequally, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM -1；
Wherein N is SYM The number of all OFDM symbols corresponding to the data packet; n (N) CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS The coded bit number contained in each layer of each symbol except the second type symbol in all OFDM symbols carrying the data packet;
determining the position of the first type symbol as N according to the number of the first type symbols SYM Front in an OFDM symbolSuccessive symbols;
determining the position of the second type symbol as N according to the number of the second type symbol SYM Last m of the OFDM symbols STBC Successive symbols.
According to the method for deleting the filling bit provided by the invention, the method for determining the number and the positions of the target symbols with the filling bit in the OFDM symbols according to the configuration information comprises the following steps:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is not enabled and the space-time block code is enabled STBC =2, determining that the number of first type symbols having first type filler bits in the orthogonal frequency division multiplexing symbol is =0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
According to the method for deleting the filling bit provided by the invention, the method for determining the number and the positions of the target symbols with the filling bit in the OFDM symbols according to the configuration information comprises the following steps:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, determining that the number of second-class symbols with second-class filling bits in the orthogonal frequency division multiplexing symbols is m under the condition that the dual-carrier modulation and the space-time block code are not enabled STBC =1, determining the number of first type symbols with first type padding bits in the orthogonal frequency division multiplexing symbol as=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
According to the method for deleting the filling bits provided by the invention, the deleting process is performed on the filling bits in the target symbol, and the method comprises at least one of the following steps:
Deleting the first type filling bits in the first type symbols; the first type padding bit is the last bit of all bits included in the first type symbol;
deleting the second type filling bits in the second type symbols; the second type of padding bits is the last N bits of all bits included in the second type of symbols, where n=n CBPS -N CBPS_LAST ；
N CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS Is the number of coded bits contained per layer in each symbol except for the second type of symbol in all orthogonal frequency division multiplexing symbols carrying the data packet.
The present invention also provides a communication terminal including:
the data acquisition module is used for acquiring all orthogonal frequency division multiplexing symbols occupied by the data packet sent by the sending end and configuration information of the data packet;
a filling bit identification module, configured to identify a target symbol with filling bits in the orthogonal frequency division multiplexing symbol according to the configuration information;
the filling bit deleting module is used for deleting filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of deleting the padding bits as described above when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of deleting filler bits as described in any of the above.
The invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a method of deleting padding bits as described in any one of the above.
The method for deleting the filling bit, the terminal equipment and the storage medium provided by the invention are characterized in that each orthogonal frequency division multiplexing symbol occupied by a data packet sent by a sending end and configuration information of the data packet are obtained; identifying target symbols with first type filling bits and/or second type filling bits in the OFDM symbols according to the configuration information; and deleting the filling bits in the target symbol. The processing flows of different depacketizing modules at the receiving end can be combined and processed by uniformly identifying and deleting filling bits filled based on different purposes in the orthogonal frequency division multiplexing symbol, repeated transmission of configuration parameters among different modules is avoided, processing time of a bit-level module at the receiving end is saved, and therefore link processing time delay in a data packet transmission process is effectively reduced, and further transmission efficiency of the data packet can be improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of a method for deleting a filler bit according to the present invention;
FIG. 2 is a second flow chart of the method for deleting the padding bits according to the present invention;
fig. 3 is a schematic structural diagram of a communication terminal provided by the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method for deleting the filling bits is applied to a receiving end, and in the 802.11 ax protocol, when a transmitting end transmits a data packet to the receiving end, the transmitting end needs to fill bits for the problem that the bit numbers before and after OFDM symbol coding cannot be aligned. In order to recover the original bits, the receiving end needs to identify the invalid bits filled by the transmitting end and delete the invalid bits. Specifically, referring to fig. 1, fig. 1 is a flow chart of a method for deleting a filler bit according to the present invention, and based on fig. 1, the method for deleting a filler bit according to the present invention includes:
step 100, obtaining configuration information of a data packet and an orthogonal frequency division multiplexing symbol carrying the data packet;
firstly, configuration information of a data packet is obtained, and an orthogonal frequency division multiplexing symbol carrying the data packet, namely an OFDM symbol, is generated by a transmitting end and indicated to a receiving end. The configuration information of the data packet comprises the message length, the layer number, the modulation and coding strategy and the like of the data packet.
Step 200, identifying a target symbol with filling bits in the orthogonal frequency division multiplexing symbol according to the configuration information;
step 300, deleting the filling bits in the target symbol;
The target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
And identifying a target symbol with filling bits from all OFDM symbols occupied by the data packet according to the configuration information of the data packet, and deleting the filling bits in the target symbol. The target symbol with the filling bits comprises a first type symbol and/or a second type symbol, the positions of the first type symbol and the second type symbol are different in all OFDM symbols corresponding to the data packet, the first type symbol is filled with the first type filling bits, and the second type symbol is filled with the second type filling bits. Based on this, the filler bits in the target symbol include a first type of filler bits in the first type of symbol and a second type of filler bits in the second type of symbol. The filling purposes of the first type filling bit and the second type filling bit are different, specifically, the first type filling bit is used for adapting the coding rate, so that the bit numbers of the same OFDM symbol before and after coding are kept consistent; the second type of padding bits is bit padding performed after encoding in order to keep the number of bits after encoding uniform for all OFDM symbols.
Based on the configuration information of the data packet, OFDM symbols with filling bits filled based on different purposes can be identified, so that the processing flows of different modules such as coding and decoding and filling of a rear forward error correction code are combined and processed, repeated transmission of parameters among different modules is avoided, the number of communication interfaces among the modules is reduced, repeated judgment of the filling bits is carried out, link processing time delay is effectively reduced, and transmission efficiency of the data packet is improved.
Further, in step 200, identifying the target symbol with the padding bits in the OFDM symbol according to the configuration information of the data packet specifically includes:
step 201, determining the number and the positions of target symbols with filling bits in the orthogonal frequency division multiplexing symbols according to the configuration information;
and step 202, identifying the target symbols from the orthogonal frequency division multiplexing symbols according to the number and the positions of the target symbols.
When identifying the target symbol with filling bit in all OFDM symbols, firstly determining the number and the position of the target symbol with filling bit in all OFDM symbols according to the configuration information of the data packet, and identifying the target symbol with filling bit in the OFDM symbols according to the number and the position of the target symbol. Including determining the number and location of first type symbols for which a first type of padding bit is present and the number and location of second type symbols for which a second type of padding bit is present.
In step 201, determining the number and positions of the target symbols with the padding bits in all OFDM symbols according to the configuration information of the data packet, including:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is enabled and the space-time block code is not enabled STBC =1；
If N CBPS_LAST And N CBPS Equality, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM ；
If N CBPS_LAST And N CBPS Unequally, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM -1；
Wherein N is SYM Is the number of all orthogonal frequency division multiplexing symbols carrying the data packet; n (N) CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS The number of coded bits contained in each layer of each symbol except the second type of symbol in all OFDM symbols carrying the data packet;
determining the position of the first type symbol as N according to the number of the first type symbols SYM Front in an OFDM symbolSuccessive symbols;
determining the position of the second type symbol as N according to the number of the second type symbol SYM Last m of the OFDM symbols STBC Successive symbols.
Specifically, firstly, according to configuration information of a data packet, enabling conditions of dual carrier modulation (Dual Carrier Modulation, DCM) and Space-Time Block Codes (STBC) corresponding to the data packet are determined. Based on this enabling case, in case the dual carrier modulation DCM is enabled and the space time block code STBC is not enabled, the number of second type symbols is 1, i.e. m STBC =1. In this case, for N CBPS_LAST And N CBPS Make a determination if N CBPS_LAST And N CBPS Equality, the number of the first type symbols in the OFDM symbol can be determinedThe amount is=N SYM The method comprises the steps of carrying out a first treatment on the surface of the If N CBPS_LAST And N CBPS Not equal, the number of first type symbols in the OFDM symbols can be determined as +.>=N SYM -1. Wherein N is SYM Is the number of all OFDM symbols carrying the data packet; n (N) CBPS_LAST Is m STBC The second type symbols comprise the coded bit number of each layer of each second type symbol; n (N) CBPS Is N SYM Dividing m in OFDM symbols STBC The other symbols than the second type of symbol each layer contains the number of encoded bits.
After determining the number of the first type of symbols and the number of the second type of symbols, the position of the first type of symbols can be determined as N according to the number of the first type of symbols SYM Front in OFDM symbolSuccessive symbols; from the number of the second type of symbols, the position of the second type of symbols can be determined to be N SYM Last m in OFDM symbols STBC Successive symbols. I.e. in all OFDM symbols for which the data packet corresponds, the former +.>The successive symbols being of the first type, the last m STBC The consecutive symbols are of the second type.
Further, based on the enabling condition of the dual carrier modulation DCM and the space time block code STBC, in the case that the dual carrier modulation DCM is not enabled and the space time block code STBC is enabled, step 201 includes:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, in the case that the dual carrier modulation is not enabled and the space-time block code is enabled, determining that, in the orthogonal frequency division multiplexing symbol,the number of second type symbols in which the second type filler bits are present is m STBC =2, determining that the number of first type symbols having first type filler bits in the orthogonal frequency division multiplexing symbol is=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
Based on the enabling condition of the dual carrier modulation DCM and the space time block code STBC, in the case that the dual carrier modulation DCM is not enabled and the space time block code STBC is enabled, the number of the second type of symbols in the OFDM symbols can be determined to be m STBC The number of symbols of the first type is =2=0。
Further, based on the enabling conditions of the dual carrier modulation DCM and the space time block code STBC, in the case that neither the dual carrier modulation DCM nor the space time block code STBC is enabled, step 201 includes:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, determining that the number of second-class symbols with second-class filling bits in the orthogonal frequency division multiplexing symbols is m under the condition that the dual-carrier modulation and the space-time block code are not enabled STBC =1, determining the number of first type symbols with first type padding bits in the orthogonal frequency division multiplexing symbol as=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
Modulating neither DCM nor STBC in dual carrier Where possible, it may be determined that the number of second type symbols in the OFDM symbol is m STBC The number of symbols of the first type is =1=0。
It should be noted that the dual carrier modulation DCM and the space time block code STBC cannot be enabled at the same time, but the dual carrier modulation DCM and the space time block code STBC are allowed to be disabled at the same time. Thus, at N SYM In the OFDM symbols, based on configuration information of the data packet, for the number and positions of the first type of symbols and the second type of symbols, the following determination manner exists:
the preamble is enabled by dual carrier modulation DCM and space time block code STBC is disabledThe successive OFDM symbols are of the first type, and the last m STBC The consecutive OFDM symbols are of the second type, and if N CBPS_LAST =N CBPS Then=N SYM If N CBPS_LAST ≠N CBPS Then->=N SYM -1；
In the case of a dual carrier modulated DCM being disabled and a space time block code STBC being enabled, the number of first type symbols is 0, i.e=0, last m STBC The successive OFDM symbols are of the second type, and m STBC =2；
In the case that both the dual carrier modulation DCM and the space time block code STBC are not enabled, the number of the first type symbols is 0, namely=0, last m STBC The successive OFDM symbols are of the second type, and m STBC =1。
According to the configuration information of the data packet, the enabling conditions of the dual carrier modulation DCM and the space time block code STBC corresponding to the data packet are determined, and according to the enabling conditions, the number and the position of the first type of symbols and the number and the position of the second type of symbols are respectively determined, so that all OFDM symbols with filling bits are identified.
Further, in step 300, the erasure processing is performed on the padding bits in the target symbol, including at least one of the following:
step 301, deleting first type filling bits in the first type symbols; the first type padding bit is the last bit of all bits included in the first type symbol;
step 302, deleting the second type filling bits in the second type symbol; the second type of padding bits is the last N bits of all bits included in the second type of symbols, where n=n CBPS -N CBPS_LAST ；
N CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS Is the number of coded bits contained per layer in each symbol except for the second type of symbol in all orthogonal frequency division multiplexing symbols carrying the data packet.
Since the target symbol with the filler bits includes the first type symbol and the second type symbol, when deleting the filler bits in the target symbol, deleting the first type filler bits in the first type symbol and/or deleting the second type filler bits in the second type symbol is included. Wherein the first type of padding bit is the last 1 bit of all bits of the first type of symbol, the second type of padding bit is the last N bits of all bits of the second type of symbol, n=n CBPS -N CBPS_LAST 。
Further, the first type filling bits in the first type of symbols are deleted to obtain the effective bits of the first type of symbols, and similarly, the second type filling bits in the second type of symbols are deleted to obtain the effective bits of the second type of symbols. After deleting the first type of filler bits in the first type of symbols and the second type of filler bits in the second type of symbols, forN corresponding to data packet SYM And the OFDM symbols are sequentially connected with the effective bits of each OFDM symbol to obtain all the effective bits of the data packet.
In this embodiment, the method for deleting the padding bits provided by the invention can combine and process the processing flows of the receiving end coding and unfilling module and the unfilling module of the rear forward error correction code aiming at the special configuration scene of the wireless network 802.11ax protocol, thereby avoiding repeated transmission of parameters among different modules, saving the processing time of the receiving end bit level module and further effectively reducing the link processing time delay.
When the code and post-forward error correction code are processed separately, then the code and post-forward error correction code are processed separately SYM The OFDM symbols are subjected to filling bit judgment one by one, and the effective bits of the first OFDM symbol are sequentially stored, wherein the storage quantity is that *（N CBPS -1) and then p->*N CBPS Last m of the bits STBC The filling bit of each continuous symbol is judged, and the effective bits of the second OFDM symbol are sequentially stored, wherein the storage quantity is m STBC * N CBPS_LAST . After the code and the post-forward error correction code are combined and processed, the storage quantity of the input bits processed for the second OFDM symbol is m STBC *N CBPS It can be determined that the number of input bits stored when the combining processing scheme processes the second type OFDM symbol is reduced by (N SYM -m STBC ）*N CBPS When carrying data packet, OFDM symbol number N SYM When the bit size is larger, the scheme of merging processing can effectively reduce the bit number required to be stored.
Preferably, referring to fig. 2, fig. 2 is another flow chart of the method for deleting a stuff bit provided by the present invention, and the method for deleting a stuff bit provided by the present invention is described below with reference to fig. 2.
First, obtain the sending end fingerThe configuration information of the data packet and all OFDM symbols occupied by the data packet sent by the sending end determine whether the dual carrier modulation DCM corresponding to the data packet is enabled according to the configuration information, if yes, then N is determined CBPS_LAST And N CBPS Whether or not to be equal to N CBPS_LAST And N CBPS When equal, at N SYM Front in OFDM symbolThe first type of filler bits are deleted in consecutive OFDM symbols, wherein- >=N SYM The method comprises the steps of carrying out a first treatment on the surface of the When N is CBPS_LAST And N CBPS When not equal, at N SYM Front ∈in each OFDM symbol>The first type of filler bits are deleted in consecutive OFDM symbols, wherein->=N SYM -1; since the dual carrier modulation DCM and the space-time block code STBC cannot be enabled at the same time, when the dual carrier modulation DCM is enabled, the space-time block code STBC is disabled, and the number m of the second type symbols is the same as the number m STBC =1, at N SYM Last m in OFDM symbols STBC And deleting the second type of filling bits in the OFDM symbols. In case the dual carrier modulation DCM is enabled and the space time block code STBC is disabled, the last OFDM symbol is both a first type of symbol and a second type of symbol.
Further, if the dual carrier modulation DCM is not enabled, the number of first type symbols is 0, i.e=0, determining whether space-time block code STBC is enabled, if space-time block code STBC is enabled, the number of second type symbols m STBC =2, if space-time block code STBC is not enabled, the number of second type symbols m STBC =1, only at the last m STBC Deleting second class on OFDM symbolFilling bits is sufficient.
Further, the first type of padding bits is the last 1 bit of all bits of the first type of symbols, the second type of padding bits is the last N bits of all bits of the second type of symbols, n=n CBPS -N CBPS_LAST . The first type filling bits and the second type filling bits are invalid bits, and after deleting the first type filling bits in the first type symbols and/or deleting the second type filling bits in the second type symbols, the valid bits of each OFDM symbol are obtained, and the valid bits of each OFDM symbol are sequentially connected to obtain all the valid bits of the data packet received by the receiving end.
In this embodiment, by identifying and deleting different types of filling bits, processing flows of different filling modules at the receiving end can be combined and processed, repeated transmission of configuration parameters in different modules at the receiving end and the number of communication interfaces between the modules are avoided, processing time of bit-level modules at the receiving end is saved, link processing time delay in a data packet transmission process is effectively reduced, and further transmission efficiency of the data packet can be improved.
The communication terminal provided by the present invention will be described below, and the communication terminal described below and the method for deleting the padding bits described above may be referred to correspondingly to each other.
Referring to fig. 3, the communication terminal provided by the present invention includes:
a data acquisition module 10, configured to acquire configuration information of a data packet sent by a sending end, and each orthogonal frequency division multiplexing symbol carrying the data packet;
A padding identification module 20, configured to identify a target symbol in which padding exists in the ofdm symbol according to the configuration information;
a padding deleting module 30, configured to delete padding in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
In one embodiment, the pad identification module 20 is further configured to:
determining the number and the positions of target symbols with filling bits in the OFDM symbols according to the configuration information;
and identifying the target symbols from the orthogonal frequency division multiplexing symbols according to the number and the positions of the target symbols.
In one embodiment, the pad identification module 20 is further configured to:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is enabled and the space-time block code is not enabled STBC =1；
If N CBPS_LAST And N CBPS Equality, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM ；
If N CBPS_LAST And N CBPS Unequally, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM -1；
Wherein N is SYM The number of all OFDM symbols corresponding to the data packet; n (N) CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS Is the number of coded bits contained per layer for each symbol other than the second type of symbol;
determining the position of the first type symbol as N according to the number of the first type symbols SYM Front in an OFDM symbolSuccessive symbols;
determining the position of the second type symbol as N according to the number of the second type symbol SYM Last m of the OFDM symbols STBC Successive symbols.
In one embodiment, the pad identification module 20 is further configured to:
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is not enabled and the space-time block code is enabled STBC =2, determining that the number of first type symbols having first type filler bits in the orthogonal frequency division multiplexing symbol is=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
In one embodiment, the pad identification module 20 is further configured to:
based on the enabling condition, determining that the number of second-class symbols with second-class filling bits in the orthogonal frequency division multiplexing symbols is m under the condition that the dual-carrier modulation and the space-time block code are not enabled STBC =1, determining the number of first type symbols with first type padding bits in the orthogonal frequency division multiplexing symbol as=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
In one embodiment, the pad deletion module 30 is further configured to:
deleting the first type filling bits in the first type symbols; the first type padding bit is the last bit of all bits included in the first type symbol;
Deleting the second type filling bits in the second type symbols; the second type of padding bits is the last N bits of all bits included in the second type of symbols, where n=n CBPS -N CBPS_LAST ；
N CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS Is the number of coded bits contained per layer in each symbol except for the second type of symbol in all orthogonal frequency division multiplexing symbols carrying the data packet.
Fig. 4 illustrates a physical schematic diagram of an electronic device, as shown in fig. 4, which may include: processor 410, communication interface (Communications Interface) 420, memory 430 and communication bus 440, wherein processor 410, communication interface 420 and memory 430 communicate with each other via communication bus 440. Processor 410 may invoke logic instructions in memory 430 to perform a method of padding bit deletion, the method comprising:
acquiring configuration information of a data packet sent by a sending end and carrying all orthogonal frequency division multiplexing symbols of the data packet;
identifying a target symbol with filling bits in the OFDM symbol according to the configuration information;
Deleting the filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
Further, the logic instructions in the memory 430 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of executing the method of deleting padding bits provided by the methods described above, the method comprising:
acquiring configuration information of a data packet sent by a sending end and carrying all orthogonal frequency division multiplexing symbols of the data packet;
identifying a target symbol with filling bits in the OFDM symbol according to the configuration information;
deleting the filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform a method of deleting a stuff bit provided by the above methods, the method comprising:
Acquiring configuration information of a data packet sent by a sending end and carrying all orthogonal frequency division multiplexing symbols of the data packet;
identifying a target symbol with filling bits in the OFDM symbol according to the configuration information;
deleting the filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (5)

1. A method for deleting a filler bit, comprising:
acquiring configuration information of a data packet and carrying an orthogonal frequency division multiplexing symbol of the data packet;
identifying a target symbol with filling bits in the OFDM symbol according to the configuration information;
deleting the filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose;
the identifying the target symbol with the filling bit in the orthogonal frequency division multiplexing symbol according to the configuration information comprises the following steps:
determining the number and the positions of target symbols with filling bits in the OFDM symbols according to the configuration information;
identifying the target symbols from the orthogonal frequency division multiplexing symbols according to the number and the positions of the target symbols;
the determining, according to the configuration information, the number and the positions of target symbols with padding bits in the orthogonal frequency division multiplexing symbols includes:
Determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
determining the second type of symbol in the case that the dual carrier modulation is enabled and the space-time block code is not enabled based on the enabling conditionNumber m STBC =1；
If N CBPS_LAST And N CBPS Equality, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM ；
If N CBPS_LAST And N CBPS Unequally, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM -1；
Wherein N is SYM Is the number of all orthogonal frequency division multiplexing symbols carrying the data packet; n (N) CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS The number of coded bits contained in each layer of each symbol except the second type of symbol in all OFDM symbols carrying the data packet;
determining the position of the first type symbol as N according to the number of the first type symbols SYM Front in an OFDM symbolSuccessive symbols;
determining the position of the second type symbol as N according to the number of the second type symbol SYM Last m of the OFDM symbols STBC Successive symbols;
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is not enabled and the space-time block code is enabled STBC =2, determining that the number of first type symbols having first type filler bits in the orthogonal frequency division multiplexing symbol is=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols;
based on the enabling condition, determining that the number of second-class symbols with second-class filling bits in the orthogonal frequency division multiplexing symbols is m under the condition that the dual-carrier modulation and the space-time block code are not enabled STBC =1, determining the number of first type symbols with first type padding bits in the orthogonal frequency division multiplexing symbol as=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
2. The method for deleting the filler bits according to claim 1, wherein the deleting the filler bits in the target symbol comprises at least one of:
Deleting the first type filling bits in the first type symbols; the first type padding bit is the last bit of all bits included in the first type symbol;
deleting the second type filling bits in the second type symbols; the second type of padding bits is the last N bits of all bits included in the second type of symbols, where n=n CBPS -N CBPS_LAST ；
N CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS Is the number of coded bits contained per layer in each symbol except for the second type of symbol in all orthogonal frequency division multiplexing symbols carrying the data packet.
3. A communication terminal, comprising:
the data acquisition module is used for acquiring configuration information of a data packet and an orthogonal frequency division multiplexing symbol carrying the data packet;
a filling bit identification module, configured to identify a target symbol with filling bits in the orthogonal frequency division multiplexing symbol according to the configuration information;
the filling bit deleting module is used for deleting filling bits in the target symbol;
the target symbol comprises a first type symbol and/or a second type symbol, wherein the first type symbol comprises a first type filling bit, and the second type symbol comprises a second type filling bit; the first type of padding bits are different from the second type of padding bits in padding purpose;
The pad bit identification module is further configured to:
determining the number and the positions of target symbols with filling bits in the OFDM symbols according to the configuration information;
identifying the target symbols from the orthogonal frequency division multiplexing symbols according to the number and the positions of the target symbols;
the pad bit identification module is further configured to:
determining the enabling conditions of the dual carrier modulation and the space-time block code corresponding to the data packet according to the configuration information;
determining the number of the second type of symbols as m in the case that the dual carrier modulation is enabled and the space-time block code is not enabled based on the enabling condition STBC =1；
If N CBPS_LAST And N CBPS Equality, determining that the number of first type symbols with first type filling bits in the OFDM symbols is=N SYM ；
If N CBPS_LAST And N CBPS Unequally, determining that the OFDM symbols are stored in the OFDM symbolThe number of first type symbols in the first type of padding bits is=N SYM -1；
Wherein N is SYM Is the number of all orthogonal frequency division multiplexing symbols carrying the data packet; n (N) CBPS_LAST Is the number of coded bits contained in each layer of each second class symbol; n (N) CBPS The number of coded bits contained in each layer of each symbol except the second type of symbol in all OFDM symbols carrying the data packet;
Determining the position of the first type symbol as N according to the number of the first type symbols SYM Front in an OFDM symbolSuccessive symbols;
determining the position of the second type symbol as N according to the number of the second type symbol SYM Last m of the OFDM symbols STBC Successive symbols;
based on the enabling condition, determining that the number of second type symbols with second type filling bits in the orthogonal frequency division multiplexing symbols is m when the dual carrier modulation is not enabled and the space-time block code is enabled STBC =2, determining that the number of first type symbols having first type filler bits in the orthogonal frequency division multiplexing symbol is=0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols;
based on the enabling condition, determining that the number of second-class symbols with second-class filling bits in the orthogonal frequency division multiplexing symbols is m under the condition that the dual-carrier modulation and the space-time block code are not enabled STBC =1, determining the number of first type symbols with first type padding bits in the orthogonal frequency division multiplexing symbol as =0；
Determining the position of the second type symbol as the last m of all OFDM symbols carrying the data packet according to the number of the second type symbol STBC Successive symbols.
4. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of deleting the padding bits according to any one of claims 1 to 2 when executing the program.
5. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the method of deleting padding bits according to any one of claims 1 to 2.
CN202310629850.7A 2023-05-31 2023-05-31 Method for deleting filling bit, terminal equipment and storage medium Active CN116346565B (en)

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