WO2017020299A1

WO2017020299A1 - Method and station for transmitting identifier

Info

Publication number: WO2017020299A1
Application number: PCT/CN2015/086265
Authority: WO
Inventors: 马征; 罗荻; 朱俊
Original assignee: 华为技术有限公司
Priority date: 2015-08-06
Filing date: 2015-08-06
Publication date: 2017-02-09
Also published as: CN107852641A; WO2017020299A9; CN107852641B

Abstract

Provided in an embodiment of the invention is a method for transmitting an identifier in a wireless local area network, comprising: performing, by a transmission unit, zero-termination convolutional coding on an information sequence, wherein an identifier sequence is located in a front portion of the information sequence; and compressing, by the transmission unit, a tail bit in the information sequence, and embedding the compressed tail bit in an associated ID for transmission. Also provided in the embodiment of the invention is a related station. Applying the method and station provided in the embodiment of the invention reduces overhead of a CRC sequence and a tail bit, increases data stream transmission efficiency, and exhibits superior performance than tail-biting convolutional coding.

Description

Method and site for transmitting identifiers

Technical field

The present invention belongs to the field of communications technologies, and in particular, to a method and a station for transmitting an identifier.

Background technique

The convolutional code is the preferred channel coding scheme for current WLAN standards (eg, IEEE 802.11ac). The convolutional encoder used in IEEE 802.11ac is shown in Figure 1. It has a constraint length of 7 and a code rate of 1/2. Six zero bits are added at the end of the information sequence at the encoder input, and 12 tail bits are added to the output.

Specifically, the convolutional code is mainly divided into a return-to-zero convolutional code and a tail-biting convolutional code. The former needs to add 0 bits at the end of the information stream to force the state of the convolutional code to zero; the latter initializes the encoder with the bits of the user data packet itself, causing the trellis diagram to start and end in a certain state.

It is generally believed that the performance of the zeroing convolutional code is better than the tailing convolutional code, but the tailing convolutional code does not require any extra bits to be transmitted, and the zeroing convolutional code requires the transmission of additional tail bits. In short frame applications, the bit rate loss caused by the tail bits cannot be ignored. The zeroing convolutional code transmission scheme adopted by the IEEE802.11ac standard simply transmits the encoded data directly, that is, it bears the extra overhead caused by the tail bits.

In the WLAN standard, the data transmission process of the AP and the STA is as follows.

The data packet sent by the AP specifies the STA to be received. The specified method is to include one or more user ID numbers in the data packet. Each STA that receives the data packet uses the local user ID number and the received data packet. User ID number XOR. If the XOR result of STA1 is all 0, it means that the data packet is sent to STA1; if the XOR result is not all 0, it means that the data packet is not sent to STA1, and STA1 discards the data packet.

Since the STA knows its own user ID at the receiving end, the AP can embed some information in the user ID of the transmitting data packet at the transmitting end. At the receiving end, the STA decrypts the embedded information with the local user ID, which can reduce the codeword overhead of the transport stream.

At present, there is a Build-In CRC technical solution in which the CRC redundancy check code is XORed with the user ID in the user data packet, and the CRC is solved at the receiving end by the STA's own user ID, and then the CRC is performed. Test.

The technical solution can cooperate with the tail-biting convolutional code to reduce the overhead of the CRC codeword when transmitting the data stream, and further reduce the overhead of the tail bit, thereby improving the efficiency of transmitting the data stream.

However, the performance of the tail biting convolutional code is worse than the zeroing convolutional code, and the decoder is more complex than the zeroing convolutional code.

Summary of the invention

In view of this, the present invention provides a method and apparatus for transmitting an identifier for reducing overhead of a tail bit and improving the efficiency of transmitting a data stream.

In a first aspect, an embodiment of the present invention provides a method for transmitting an identifier, which is applied to a WLAN, including:

Selecting a partial bit of the identifier sequence of the first information sequence to be exclusive OR with a cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

Performing zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence;

Selecting m bits of the specified position in the second information sequence, compressing m bits of the specified position of the protocol into n bits, n being an even number greater than 0, and m is greater than n;

Exchanging the compressed n-bit bits with the first n-bit bits of the second information sequence;

Deleting the m-bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU;

Sending the third sequence of information.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the selecting an m-bit of a specified position in the second information sequence, and compressing the m-bit of the specified position of the protocol into n The bit bit includes: compressing a 12-bit bit of a predetermined position in the second information sequence into 6-bit bits.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation manner of the first aspect, the protocol specifies an m-bit of a location, including: a tail m-bit of the second information sequence.

In a second aspect, an embodiment of the present invention provides a method for transmitting an identifier, which is applied to a WLAN, including:

Receiving a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Encoding a first partial bit in the sequence of local identifiers to obtain a first coding subsequence of n bits, the first partial number of bits being n/2, n being an even number greater than 0;

And performing soft exclusive OR processing on the first coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR processing includes: A soft value is reserved on a corresponding bit of the 0" bit, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Converting the first sub-sequence of the n-bit bit to obtain a second sub-sequence of m-bit bits, where m is an integer greater than 0, and m is greater than n;

Transforming the first information sequence to obtain a second information sequence, comprising: replacing the first coding subsequence with a head n bit of the first information sequence, and placing the second subsequence for the first The tail of the sequence of information;

Decoding the second information sequence, and XORing a second partial bit in the local identifier sequence with a partial bit of the decoded second information sequence to obtain a CRC sequence;

Determining the decoded second information sequence, comprising: the CRC sequence verification, and comparing the first partial bit in the local identifier sequence with the first n/2 bits of the decoded second information sequence Bit.

In a third aspect, an embodiment of the present invention provides a method for transmitting an identifier, which is applied to a WLAN, including:

Selecting a partial bit of the identifier sequence of the first information sequence to be exclusive to the cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

Selecting n bits of the location specified by the protocol in the second information sequence, and XORing the n bits of the specified location of the protocol with the first n bits of the second sequence of information, n being an integer greater than 0;

Deleting the n-bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU;

Sending the third sequence of information.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the protocol specifies an n-bit bit of the location, including: a tail n-bit bit of the second information sequence.

In a fourth aspect, an embodiment of the present invention provides a method for transmitting an identifier, which is applied to a WLAN, including:

Encoding a first partial bit in the sequence of local identifiers to obtain an encoded subsequence of n bits, the first partial number of bits being n/2, n being an even number greater than 0;

And performing soft exclusive OR processing on the coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: “0” in the coding subsequence A soft value is reserved on a corresponding bit of the bit, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Transforming the first information sequence to obtain a second information sequence, comprising: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with a first n bits of the first information sequence Bit

In a fifth aspect, an embodiment of the present invention provides a method for transmitting an identifier, which is applied to a WLAN, including:

Performing zero- convolutional coding on the first information sequence to obtain a second information sequence, wherein the identifier sequence is located at the front of the first information sequence;

Selecting n bits of the location specified by the protocol in the second information sequence, and XORing the n bits of the specified location of the protocol with the first n bits of the second information sequence, n being an integer greater than 0;

Sending the third sequence of information.

In conjunction with the fifth aspect, in a first possible implementation manner of the fifth aspect, the protocol specifies an n-bit bit of the location, including: a tail n-bit bit of the second information sequence.

In a sixth aspect, an embodiment of the present invention provides a method for transmitting an identifier, which is applied to a WLAN, including:

Encoding the sequence of local identifiers to obtain an encoded subsequence of n bits, n being an integer greater than 0;

Transforming the first information sequence to obtain a second information sequence, comprising: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with a first n bits of the first information sequence Bit.

In a seventh aspect, an embodiment of the present invention provides a station for transmitting an identifier, which is applied to a WLAN of a wireless local area network, and includes:

a baseband chip, the partial bit of the identifier sequence for selecting the first information sequence is XORed with the cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

The baseband chip is further configured to perform a zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence;

The baseband chip is further configured to select an m-bit bit of a predetermined position in the second information sequence, compress the m-bit bit of the specified position of the protocol into an n-bit bit, n is an even number greater than 0, and m is greater than n ;

The baseband chip is further configured to XOR the compressed n-bit bit with the first n-bit bit of the second information sequence;

The baseband chip is further configured to delete the m-bit bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in an efficient signaling field HE-SIG of the physical layer protocol data unit PPDU;

And a radio frequency chip, configured to send the third information sequence.

With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the baseband chip selects an m-bit of a specified position in the second information sequence, and compresses the m-bit of the specified position of the protocol. The n-bit bit includes: compressing a 12-bit bit of a predetermined position in the second information sequence into 6-bit bits.

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner of the seventh aspect, the protocol specifies an m-bit of the location, including: a tail m-bit of the second information sequence.

In an eighth aspect, an embodiment of the present invention provides a station for transmitting an identifier, which is applied to a WLAN of a wireless local area network, and includes:

a radio frequency chip, configured to receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

a baseband chip, configured to encode a first partial bit in the sequence of local identifiers to obtain a first coding subsequence of n bits, wherein the first partial number of bits is n/2, and n is an even number greater than 0;

The baseband chip is further configured to perform a soft exclusive OR processing on the first coding subsequence and a soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes : a soft value is reserved on a corresponding bit of the "0" bit in the coding subsequence, and a soft value on a corresponding bit of the "1" bit in the coding subsequence is inverted;

The baseband chip is further configured to transform the first sub-sequence of the n-bit bit to obtain a second sub-sequence of m-bit bits, where m is an integer greater than 0, and m is greater than n;

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, including: replacing the first coding subsequence with a head n bit of the first information sequence, a second subsequence placing a tail of the first information sequence;

The baseband chip is further configured to decode the second information sequence, and XOR the second partial bit in the local identifier sequence and a partial bit of the decoded second information sequence to obtain a CRC sequence;

The baseband chip is further configured to determine the decoded second information sequence, including: the CRC sequence verification, and compare a first partial bit in the local identifier sequence with the decoded second The first n/2 bits of the information sequence.

In a ninth aspect, an embodiment of the present invention provides a station for transmitting an identifier, which is applied to a WLAN of a wireless local area network, and includes:

The baseband chip, the partial bit of the identifier sequence for selecting the first information sequence is XORed with the cyclic redundancy code CRC, wherein the identifier sequence is located at the head of the first information sequence;

The baseband chip is further configured to select an n-bit bit of a protocol specified position in the second information sequence, and XOR the n-bit bit of the protocol specified position with the first n-bit bit of the second information sequence, where n is An integer greater than 0;

The baseband chip is further configured to delete n bits of the specified location of the protocol to obtain a third information sequence, where the third information sequence is located in an efficient signaling field HE-SIG of the physical layer protocol data unit PPDU;

The radio frequency chip is configured to send the third information sequence.

In conjunction with the ninth aspect, in a first possible implementation manner of the ninth aspect, the protocol specifies an n-bit bit of the location, including: a tail n-bit of the second information sequence.

In a tenth aspect, an embodiment of the present invention provides a station for transmitting an identifier, which is applied to a WLAN of a wireless local area network, and includes:

a baseband chip, configured to encode a first partial bit in a sequence of local identifiers to obtain an encoded subsequence of n bits, wherein the first partial number of bits is n/2, and n is an even number greater than 0;

The baseband chip is further configured to perform soft exclusive OR processing on the coding subsequence and a soft value of a first n bit of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: A soft value is reserved on a corresponding bit of the "0" bit in the coding subsequence, and a soft value on a corresponding bit of the "1" bit in the coding subsequence is inverted;

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, including: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with the The first n bits of the first information sequence;

The baseband chip is further configured to decode the second information sequence, where the local XORing a second partial bit in the identifier sequence with a partial bit of the decoded second information sequence to obtain a CRC sequence;

In an eleventh aspect, an embodiment of the present invention provides a station for transmitting an identifier, which is applied to a WLAN of a wireless local area network, and includes:

a baseband chip, configured to perform a zero- convolutional coding on the first information sequence to obtain a second information sequence, where the identifier sequence is located at a front portion of the first information sequence;

The baseband chip is further configured to select an n-bit bit of a protocol specified position in the second information sequence, and XOR the n-bit bit of the protocol specified position with the first n-bit bit of the second information sequence, where n is greater than 0 Integer

And a radio frequency chip, configured to send the third information sequence.

In conjunction with the eleventh aspect, in a first possible implementation manner of the eleventh aspect, the protocol specifies an n-bit of a location, including: a tail n-bit of the second information sequence.

In a twelfth aspect, the embodiment of the present invention provides a station for transmitting an identifier, which is applied to a WLAN of a wireless local area network, and includes:

a baseband chip for encoding a sequence of local identifiers to obtain an encoded subsequence of n bits, n being an integer greater than zero;

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, where The method includes: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with a first n bits of the first information sequence.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the transmitting unit performs zero-reversed convolutional coding on the information sequence, wherein the identifier sequence is located at the front of the information sequence. Moreover, the transmitting unit compresses the tail bit in the information sequence and embeds it into the associated ID for transmission. In the above manner, the overhead of the CRC sequence and the tail bit is reduced, and the efficiency of transmitting the data stream is improved, and compared The tail biting convolutional coding performance is better.

DRAWINGS

FIG. 1 is a diagram of an application scenario of the present invention.

2 is a flow chart of a method according to Embodiment 1 of the present invention.

FIG. 3 is a structural diagram of a physical layer protocol data unit PPDU according to an embodiment of the present invention.

4 is a block diagram 1 of a process according to Embodiment 1 of the present invention.

Fig. 5 is a block diagram 2 of the processing according to the first embodiment of the present invention.

Fig. 6 is a block diagram 3 of the process according to the first embodiment of the present invention.

FIG. 7 is a flowchart of a method according to Embodiment 2 of the present invention.

Fig. 8 is a block diagram 1 of a process according to a second embodiment of the present invention.

Fig. 9 is a block diagram 2 showing a process according to a second embodiment of the present invention.

FIG. 10 is a block diagram 3 of a process according to Embodiment 2 of the present invention.

FIG. 11 is a flowchart of a method according to Embodiment 3 of the present invention.

FIG. 12 is a flowchart of a method according to Embodiment 4 of the present invention.

FIG. 13 is a flowchart of a method according to Embodiment 5 of the present invention.

14 is a flow chart of a method according to Embodiment 6 of the present invention.

Figure 15 is a diagram showing the hardware configuration of Embodiment 7-12 of the present invention.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention are further described in detail below. In order to fully understand the present invention, the following details A number of specific details are mentioned in the detailed description. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiments of the present invention can be applied to a WLAN. Currently, the standard adopted by the WLAN is the IEEE 802.11 series. The WLAN may include multiple basic service sets (English: Basic Service Set, BSS for short). The network nodes in the basic service set are stations (English: Station, abbreviated as STA). The site includes the access point class (abbreviation: AP). , English: Access Point) and non-access point class sites (English: None Access Point Station, referred to as: Non-AP STA). Each basic service set may contain one AP and multiple Non-AP STAs associated with the AP.

Access point class sites, also known as wireless access points or hotspots. The AP is an access point for mobile users to enter the wired network. It is mainly deployed in the home, inside the building, and inside the campus. The typical coverage radius is tens of meters to hundreds of meters. Of course, it can also be deployed outdoors. An AP is equivalent to a bridge connecting a wired network and a wireless network. Its main function is to connect the wireless network clients together and then connect the wireless network to the Ethernet. Specifically, the AP may be a terminal device or a network device with a WiFi (English: Wireless Fidelity) chip. Optionally, the AP may be a device supporting the 802.11ax system. Further, the AP may be a device supporting multiple WLAN technologies such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

A non-access point class (English: None Access Point Station, referred to as Non-AP STA), which can be a wireless communication chip, a wireless sensor, or a wireless communication terminal. For example: mobile phone supporting WiFi communication function, tablet computer supporting WiFi communication function, set-top box supporting WiFi communication function, smart TV supporting WiFi communication function, smart wearable device supporting WiFi communication function, and vehicle communication supporting WiFi communication function Devices and computers that support WiFi communication. Optionally, the site can support the 802.11ax system. Further optionally, the site supports multiple WLAN formats such as 802.11ac, 802.11n, 802.11g, 802.11b, and 802.11a.

Figure 1 is a system diagram of a typical WLAN deployment scenario, including an AP and three STAs, and the AP communicates with STA1, STA2, and STA3, respectively.

Example 1

Embodiment 1 of the present invention provides a method for transmitting a transmission identifier in a WLAN, and the method can be applied to a site, such as the AP and STA1-STA3 in FIG. 1, which can support a next-generation WLAN standard, for example: 802.11ax standard. 2 is a flow chart of the method of transmitting an identifier, the specific steps are as follows:

Step 110: Select a partial bit of the identifier sequence of the first information sequence to XOR with a cyclic redundancy code CRC, where the identifier sequence is located at a head of the first information sequence;

Step 120: Perform a zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence.

Step 130: Select an m-bit bit in a predetermined position in the second information sequence, and compress an m-bit bit of the specified position of the protocol into an n-bit bit, where n is an even number greater than 0, and m is greater than n;

Step 140: XOR the compressed n-bit bit with the first n-bit bit of the second information sequence;

Step 150: Delete the m-bit bits of the specified location of the protocol to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU.

Step 160: Send the third information sequence.

Optionally, the protocol specifies an m-bit of the location, including: a tail m-bit of the second information sequence. The m-bit bit may be partially located at the end of the information sequence, and the other portion is located at the head of the information sequence. The present invention does not limit the position of the m-bit bit.

It should be noted that the first information sequence, the second information sequence, and the third information sequence mentioned in steps 110-150 belong to signaling, and are located in the preamble of the physical layer protocol data unit PPDU of the next generation WLAN (English: Preamble) In part, preferably, the above information sequence is located in the efficient signaling field HE-SIG, as shown in FIG. The length of the above information sequence is variable, and the length includes several tens of bits to several hundred bits. The length of the information sequence is not limited by the present invention. The description of the above information sequence is equally applicable to the subsequent embodiments.

The sequence of identifiers mentioned in step 110 includes various forms, for example: AID (English: Associate Identifier, Chinese: Association Identifier), Partial AID, Pre-AID, BSSID (English: Basic Services Set Identifier, Chinese: Basic Service) Set ID) or Partial BSSID.

Specifically, the AID is an identifier assigned by the AP to the associated site, and can be used for multi-user transmission (including multi-user transmission in the frequency domain and multi-user transmission in the spatial domain), and the length of the AID is 11 bits. The Partial AID is a reduced-length version of the AID. The Pre-AID is a temporary identifier assigned by the AP to the STA when the AP is not fully associated with multiple STAs. The BSSID is the identifier of the BSS where the AP and the STA are located. The BSSID is generally the MAC address of the AP and the length is 48 bits. The Partial BSSID is a reduced-length version of the BSSID. The description of the above identifier sequence applies equally to the subsequent embodiments.

The zeroing convolutional coding mentioned in step 120 belongs to a channel coding scheme applied to a WLAN standard (for example, IEEE 802.11ac). The zeroing convolutional code requires zero bits at the end of the stream to force the state of the convolutional code to zero, thereby causing the trellis to start and end in the all zero state.

The compression strategy for compressing the m-bit bits into n-bits in step 130 includes: if the m-bit bits include the tail bits of the second information sequence, then preferentially compressing the second information sequence from the penultimate bit to a length of mn Bits. Any n bits of the m-bit bits can be compressed if the m-bit bits do not contain a tail bit. Preferably, the m-bit bits comprise tail bits, for example the m-bit bits are all tail bits.

Steps 110 to 150 of the present embodiment are explained below with a specific example. Here, the identifier sequence is 11-bit AID, the CRC sequence is 8 bits, and the first information sequence is 30 bits.

Step 1101: Calculate an 8-bit CRC redundancy check code according to the first information sequence, and XOR the same with the last 8 bits of the AID. The AID is located at the head of the first information sequence, as shown in FIG.

Step 1201: Adding a 6-bit all-zero tail bit (30-bit information + 6-bit 0) to the first information sequence after the embedded CRC is performed, and performing a zero- convolutional coding to obtain a 72-bit second information sequence, as shown in FIG. . The first 6 bits of the second information sequence after convolutional coding are not embedded information. It should be noted that, in step 120, a zero-zero convolutional coding with a code rate of 1/2 is used.

Step 1301: The 12-bit tail bit is taken out from the end of the encoded second information sequence and compressed into 6-bit tail bits.

Specifically, the first information sequence performs a second information sequence obtained by zero- convolutional coding, and the second information sequence includes 12-bit tail bits, and the 12-bit tail bits have certain characteristics. Characteristic 1: Once the first 6 bits of the tail bit are determined, the last 6 bits are fixed, so a maximum 64-line tail bit codebook can be obtained. That is, the tail bits are compressible: after some bits of the tail bits are known, the codebook can complete the tail bits. Feature 2: The last two bits of the tail bit (bits 11, 12) must be the same.

Illustratively, the 12-bit tail bits generated by the second sequence of information are as shown in Table 1:

Table 1

According to the codebook characteristics of the tail bits, it is known that the first 5 and the last 1 bits can restore all the tail bits. The compression method used here is to remove the 6-11 bit bits, and retain the 1st to 5th and 12th tail bits to obtain the compressed 6 bits, as shown in Table 2.

Table 2

It should be understood that if it is necessary to compress the 12-bit tail bit to the n-bit, n<12, the nth, n+1, ..., 11 bits of the 12-bit tail bit can be removed according to the above rule, and the first, second, ... , n-1 and 12th.

Step 1401: XOR the compressed 6-bit tail bit with the first 6 bits of the encoded second information sequence in step 120, as shown in FIG. 6.

Step 1501: The embedded tail bits obtained in step 140 and the last 12 bits of the 72-bit second information sequence of the CRC are removed to obtain a 60-bit third information sequence.

Example 2

Embodiment 2 of the present invention provides a method for transmitting a transmission identifier in a WLAN, and the method can be applied to a site, such as the AP and STA1-STA3 in FIG. 1, and the site can support a next-generation WLAN standard, for example: 802.11ax standard. Figure 7 is a flow chart of the method of transmitting an identifier, the specific steps are as follows:

Step 210: Receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Step 220: Encode the first part of the local identifier sequence to obtain n bits. a first coding subsequence of bits, the first partial number of bits being n/2, and n being an even number greater than 0;

Step 230: Perform soft exclusive OR processing on the first coding subsequence and a soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: the coder A soft value is reserved on a corresponding bit of the "0" bit in the sequence, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Step 240: Transform the first sub-sequence of the n-bit bit to obtain a second sub-sequence of m-bit bits, where m is an integer greater than 0, and m is greater than n;

Step 250: Transform the first information sequence to obtain a second information sequence, including: replacing the first coding subsequence with a head n bit of the first information sequence, and placing the second subsequence Describe the tail of the first information sequence;

Step 260: Decode the second information sequence, and XOR the second part of the local identifier sequence with a part of the decoded second information sequence to obtain a CRC sequence.

Step 270: Determine the decoded second information sequence, including: the CRC sequence verification, and compare the first partial bit in the local identifier sequence with the first n of the decoded second information sequence /2-bit bit.

It should be noted that the sequence of local identifiers mentioned in step 220 is saved by the site itself. The local identifier sequence includes various forms, for example: AID (English: Associate Identifier, Chinese: Association Identifier), Partial AID, Pre-AID, BSSID (English: Basic Services Set Identifier, Chinese: Basic Service Set Identifier) or Partial BSSID. The sequence of local identifiers is divided into two parts, a first partial bit for the operation of step 220 and a second partial bit for the operation of step 260.

The soft value of the first n bits of the first sequence of information mentioned in step 230, the soft value being a real number, rather than a discrete "0" or "1".

The first sub-sequence of the n-bits mentioned in step 240 is transformed to obtain a second sub-sequence of m-bits, the operation of which is decompressed, and the sequence of m-bits is recovered according to the sequence of known n-bits.

Steps 210 to 270 of the present embodiment are explained below with a specific example. Here, the identifier sequence is 11-bit AID, the CRC sequence is 8 bits, and the first information sequence is 60 bits.

Step 2201: Performing the first 3 bits of the local AID without tail convolutional coding to obtain a 6-bit first coding subsequence.

Step 2301: Perform soft exclusive OR processing on the 6-bit first coding subsequence corresponding to the first 6 bits of the received first information sequence to obtain a first subsequence having a length of 6 bits. A specific soft OR rule: a soft value is reserved on a corresponding bit of the "0" bit in the first coding subsequence, and a soft value on a corresponding bit of the "1" bit in the first coding subsequence is inverted. Step 230 is specifically shown in FIG.

Step 2401: Restore the first subsequence of 6 bits to the second subsequence of 12 bits.

There are two ways to restore: a, the first 5 bits are reserved, the 6th bit is copied to the restored 11 and 12 bits, and the restored 6 to 10 bits are filled with 0. b. Restore the received 6-bit bit to a 6-bit binary bit, and then check the codebook to restore the previously compressed 6-bit bit with the codebook.

The restored 12-bit bit (reduction mode a) is shown in Table 3.

table 3

The restored 12-bit bit (reduction mode b) is shown in Table 4.

Table 4

Step 2501: Transform the first information sequence to obtain a second information sequence, specifically: placing the second sub-sequence of 12 bits into the tail of the first information sequence of length 60 bits, and replacing the first coding sub-sequence The first 6 bits of the information sequence. After the step 250 is processed, a 72-bit second information sequence is obtained. Step 250 is specifically shown in FIG.

Step 2601: Input the 72-bit second information sequence into the Viterbi decoder to obtain 36-bit information bits, and remove the last 6 bits of the 36-bit information bits to obtain 30-bit information bits of the embedded CRC. The 8-bit CRC is fetched with a second portion of the local identifier sequence (4-11 bits) or a partial bit of the 30-bit information bits. Step 260 is specifically shown in FIG.

Step 2701: Perform CRC verification on the 30-bit information bit. If the CRC is verified and the first 3 bits of the 30-bit information sequence are the same as the first 3 bits of the local identification sequence AID, the 30-bit information transmitted in this transmission is considered to be correct, otherwise discarded. The 30-bit information bit.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the receiving unit is local to After the identifier sequence is subjected to zero- convolutional coding, a soft XOR operation is performed with the received information sequence to obtain an identifier sequence and a CRC sequence. In the above manner, the identifier sequence and the CRC sequence can be extracted from the received information sequence. Ensuring that packets are properly transmitted with less overhead and is better than using tail-biting convolutional coding.

Example 3

Embodiment 3 of the present invention provides a method for transmitting a transmission identifier in a WLAN, and the method can be applied to a station, for example, an AP and a STA1-STA3 in FIG. 1, and the station can support a next-generation WLAN standard, for example: 802.11ax standard. Figure 11 is a flow chart of the method of transmitting an identifier, the specific steps are as follows:

Step 310: Select a partial bit of the identifier sequence of the first information sequence to XOR with a cyclic redundancy code CRC, where the identifier sequence is located at a head of the first information sequence;

Step 320: Perform a zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence.

Step 330: Select an n-bit bit of a specified position in the second information sequence, and XOR the n-bit bit of the specified position of the protocol with the first n-bit bit of the second information sequence, where n is an integer greater than 0;

Step 340: Delete n bits of the specified location of the protocol to obtain a third information sequence, where the third information sequence is located in the high efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU.

Step 350: Send the third information sequence.

Optionally, the protocol specifies n bits of the location, including: a tail n-bit of the second sequence of information.

Embodiment 3 differs from Embodiment 1 in that only a partial bit of an 8-bit CRC is XORed with a partial bit of an AID, and an operation of bit compression is not performed.

Steps 310 to 340 of the present embodiment are explained below with a specific example. Here, the identifier sequence is 11-bit AID, the CRC sequence is 8 bits, and the first information sequence is 30 bits.

Step 3101: Calculate an 8-bit CRC redundancy check code according to the first information sequence, and XOR the first 5 bits of the 8-bit CRC with the last 5 bits (7-11 bits) of the AID, and the last 3 positions of the CRC are at the first position. The tail of the sequence of information. The AID is located at the head of the first information sequence.

Step 3201: After adding the 6-bit all-zero-bit bit to the first information sequence after the embedded CRC (33) Bit information bits + 6 bits 0) Zero- convolutional coding is performed to obtain a 78-bit second information sequence.

Step 3301: Select the 12-bit bit of the protocol specified position in the second information sequence to be XORed with the first 12 bits of the second information sequence. It should be noted that, in step 330, before the XOR operation, the first 12 bits of the second information sequence are not embedded with information. Preferably, the 12-bit bit of the protocol specified location is located at the end of the second information sequence.

Step 3401: The 12-bit bit of the protocol specified position in the 78-bit second information sequence is removed, and a 66-bit third information sequence is obtained.

In the following, another step 310-step 340 of the embodiment is explained. Here, the identifier sequence is 11-bit AID, the CRC sequence is 4 bits, and the first information sequence is 30 bits.

Step 3102: Calculate a 4-bit CRC redundancy check code according to the first information sequence, and XOR the 4-bit CRC code with the last 4 bits of the AID (8-11 bits of the 30-bit first information sequence). The AID is located at the head of the first information sequence.

Step 3202: Adding a 6-bit all-zero tail bit (30-bit information bit + 6-bit 0) to the first information sequence after the embedded CRC is performed, and performing a zero- convolutional coding to obtain a 72-bit second information sequence.

Step 3302: Select the protocol specified location 14 bits in the second information sequence to XOR with the first 14 bits of the second information sequence. It should be noted that, in step 330, before the XOR operation, the first 14 bits of the second information sequence are not embedded with information. Preferably, the 14-bit bit of the protocol specified location may be a 12-bit tail bit of the second information sequence plus a 2-bit bit at any location.

Step 3402: The 14-bit bit of the protocol specified position in the 72-bit second information sequence is removed, and a 58-bit third information sequence is obtained.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the transmitting unit performs zero-reversed convolutional coding on the information sequence, wherein the identifier sequence is located at the front of the information sequence. Moreover, the transmitting unit transmits the tail bits in the information sequence to the associated ID for transmission. In the above manner, the overhead of the CRC sequence and the tail bits is reduced, the efficiency of transmitting the data stream is improved, and the tail biting convolution is used. Better coding performance.

Example 4

Embodiment 4 of the present invention provides a method for transmitting a transmission identifier in a WLAN, and the method can be applied to a station, for example, an AP and a STA1-STA3 in FIG. 12, and the station can support a next-generation WLAN standard, for example: 802.11ax standard. Figure X is a flow chart of the method of transmitting an identifier, the specific steps are as follows:

Step 410: Receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Step 420: Encode the first part of the local identifier sequence to obtain an encoding subsequence of n bits, the first part of the number of bits being n/2, and n being an even number greater than 0;

Step 430: Perform soft exclusive OR processing on the coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: in the coding subsequence A soft value is reserved on a corresponding bit of the "0" bit, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Step 440: Transform the first information sequence to obtain a second information sequence, including: placing the first sub-sequence to a tail of the first information sequence, and replacing the coding sub-sequence with the first information sequence The first n bits;

Step 450: Decode the second information sequence, and XOR the second partial bit in the local identifier sequence and a partial bit of the decoded second information sequence to obtain a CRC sequence.

Step 460: Determine the decoded second information sequence, including: the CRC sequence verification, and compare the first partial bit in the local identifier sequence with the first n of the decoded second information sequence /2-bit bit.

Steps 410 to 460 of this embodiment are explained below with a specific example. Here, the identifier sequence is 11-bit AID, the CRC sequence is 8 bits, and the first information sequence is 66 bits.

Step 4201: Perform zero- convolutional coding on the first 6 bits of the local identifier sequence AID to obtain a 12-bit coding subsequence.

Step 4301: The X-bit coding subsequence is subjected to XOR processing with the first 12 bits of the first information sequence to obtain a 12-bit first sub-sequence. The rule of soft exclusive OR processing leaves a soft value on the corresponding bit of the "0" bit in the first information sequence, and the soft value on the corresponding bit of the "1" bit in the first information sequence is inverted.

Step 4401: The first information sequence is transformed into the second information sequence, including: the 12-bit first sub-sequence is placed at the end of the first information sequence received by the 66-bit, and the 12-bit coding sub-sequence obtained by the local-zero convolutional coding is replaced. The first 12-bit value of the first information sequence, the 66-bit first information sequence is transformed to the 78-bit second information sequence.

Step 4501: The 78-bit second information sequence is input to the Viterbi decoder to obtain 39-bit information bits. The last 6 bits of the 39 bits of information bits are removed, resulting in a 33-bit letter with embedded CRC. Interest bits. The XOR operation is performed by using the last five bits (7 to 11 bits) of the local identifier sequence AID and the 7 to 11 bits of the 33-bit information bits of the embedded CRC to obtain a 5-bit CRC sequence and 33 bits of information bits embedded with the CRC. The last 3 bits are combined to get an 8-bit CRC.

Step 4601: Determine whether the 33-bit information bit is correctly transmitted, including: if the CRC verification passes and the first 6 bits of the 33-bit information sequence are the same as the first 6 bits of the local user AID, then the current transmission is considered correct, otherwise discarded.

In the following, another step 410-step 460 of the embodiment is explained. Here, the identifier sequence is 11-bit AID, the CRC sequence is 4 bits, and the first information sequence is 58 bits.

Step 4202: The first 7 bits of the local identifier sequence AID are subjected to zero convolutional coding to obtain a 14-bit coding subsequence.

Step 4302: The X-bit coding subsequence is subjected to XOR processing with the first 14 bits of the first information sequence to obtain a 14-bit first sub-sequence. The rule of soft exclusive OR processing leaves a soft value on the corresponding bit of the "0" bit in the first information sequence, and the soft value on the corresponding bit of the "1" bit in the first information sequence is inverted.

Step 4402: The first information sequence is transformed into the second information sequence, including: the 14-bit first sub-sequence is placed at the end of the first information sequence at the 58-bit, and the 14-bit coding sub-sequence obtained by the local-zero convolutional coding is replaced. The first 14-bit value of the first information sequence, the 58-bit first information sequence is transformed to the 72-bit second information sequence.

Step 4502: The 72-bit second information sequence is input to the Viterbi decoder to obtain 36-bit information bits. The last 6 bits of the 36-bit information bits are removed, resulting in a 30-bit information bit embedded with the CRC. The XOR operation is performed by XORing the last four bits (8 to 11 bits) of the local identifier sequence AID with the 8 to 11 bits of the 30-bit information bits of the embedded CRC to obtain a 4-bit CRC sequence.

Step 4602: Determine whether the 30-bit information bit is correctly transmitted, including: if the CRC verification passes and the first 7 bits of the 30-bit information sequence are the same as the first 7 bits of the local user AID, then the current transmission is considered correct, otherwise discarded.

In the process of transmitting an identifier in a wireless local area network, the receiving unit performs a null-OR operation on the sequence of local identifiers and performs a soft exclusive OR operation with the received information sequence to obtain an identifier sequence and a CRC sequence. In this way, the identifier sequence and the CRC sequence can be extracted from the received information sequence, ensuring that the data packet completes the correct transmission with less overhead, and is better than the tail-biting convolutional coding performance.

Example 5

Embodiment 5 of the present invention provides a method for transmitting a transmission identifier in a WLAN, and the method can be applied to a station, for example, an AP and a STA1-STA3 in FIG. 1, and the station can support a next-generation WLAN standard, for example: 802.11ax standard. Figure 13 is a flow chart of the method of transmitting an identifier, the specific steps are as follows:

Step 510: Perform a zero- convolutional coding on the first information sequence to obtain a second information sequence, where the identifier sequence is located at the front of the first information sequence;

Step 520: Select n bits of the specified position in the second information sequence, and XOR the n bits of the specified position of the protocol with the first n bits of the second information sequence, where n is an integer greater than 0;

Step 530: Delete the n-bit bits of the specified location of the protocol to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU.

Step 540: Send the third information sequence.

It should be noted that the identifier sequence mentioned in step 510 includes multiple forms, for example: AID (English: Associate Identifier, Chinese: Association Identifier), Partial AID, Pre-AID, BSSID (English: Basic Services Set Identifier) , Chinese: Basic Service Set Identifier) or Partial BSSID. Preferably, this embodiment employs an 11-bit AID.

Embodiment 5 differs from Embodiment 3 and Embodiment 1 in that the CRC redundancy check code is not embedded at all. Then the 11 bits of the AID that are not convolutionally encoded at the transmitting end are fully available. After the 11-bit AID convolutional coding, 22 available embedded bits are generated, and the 22 bits of the protocol specified position of the second information sequence can be used. Fully embedded in the first 22 bits of the second information sequence. Preferably, the 22-bit bit of the protocol specified location may be a 12-bit tail bit at the end of the encoded sequence plus a 10-bit bit at any position.

Steps 510 to 530 of the present embodiment are explained below with a specific example. Here, the identifier sequence is set to an 11-bit AID, and the first information sequence is 36 bits.

Step 5101: The 36-bit first information sequence (30-bit information bits + 6-bit 0) is subjected to zero- convolutional coding to obtain a 72-bit second information sequence.

Step 5201: The first 22 bits in the second information sequence are AIDs, and the 22 data bits are all unembedded information. Exchanging the last 22 bits of the convolutionally encoded 72-bit user data (including the 12-bit tail bit) with the first 22 bits of the second information sequence, ie, the 51st bit XOR of the convolutional encoded data stream To the 1st, 52nd XOR to 2nd... 72nd XOR to 22nd.

Step 5301: The last 22 bits of the 72-bit second information sequence are removed, and a 50-bit third information sequence is obtained for transmission.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the transmitting unit performs zero-reversed convolutional coding on the information sequence, wherein the identifier sequence is located at the front of the information sequence. Moreover, the transmitting unit transmits the tail bits in the information sequence to the associated ID for transmission. In the above manner, the overhead of the tail bits is reduced, the efficiency of transmitting the data stream is improved, and the encoding performance is better than that of the tail-biting convolution coding. excellent.

Example 6

Embodiment 6 of the present invention provides a method for transmitting a transmission identifier in a WLAN, and the method can be applied to a station, for example, an AP and a STA1-STA3 in FIG. 1, and the station can support a next-generation WLAN standard, for example: 802.11ax standard. Figure 14 is a flow chart of the method of transmitting an identifier, the specific steps are as follows:

Step 610: Receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Step 620: Encode the local identifier sequence to obtain an encoded subsequence of n bits, where n is an integer greater than 0;

Step 630: Perform soft exclusive OR processing on the coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: in the coding subsequence A soft value is reserved on a corresponding bit of the "0" bit, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Step 640: Transform the first information sequence to obtain a second information sequence, including: placing the first sub-sequence to a tail of the first information sequence, and replacing the coding sub-sequence with the first information sequence The first n bits.

Step 610 to step 640 of the present embodiment are explained below with a specific example. Here, the identifier sequence is 11-bit AID, and the first information sequence is 50 bits.

Step 6201: Perform a zero convolutional coding of the local identifier sequence (11-bit AID). Go to a 22-bit code subsequence.

Step 6301: Perform soft exclusive OR processing on the 22-bit coding subsequence with the first 22 bits of the first information sequence to obtain a 22-bit first sub-sequence.

Step 6401: Transform the 50-bit first information sequence to obtain a 72-bit second information sequence, specifically: placing the first sub-sequence of 22 bits into the tail of the 50-bit first information sequence, and the 22-bit coding sub-sequence AID The value replaces the first 22 bits of the first sequence of information received.

After step 6401, the receiver may further input a 72-bit second information sequence stream into the Viterbi decoder to obtain 36-bit information bits, and remove the last 6-bit tail bits of the 36-bit information bits to obtain the restored 30-bit information bits. .

In the process of transmitting an identifier in a wireless local area network, the receiving unit performs a soft exclusive OR operation on the sequence of local identifiers and performs a soft exclusive OR operation with the received information sequence to obtain a sequence of identifiers. The sequence of identifiers is extracted from the received sequence of information, ensuring that the packet is correctly transmitted with less overhead and is better than using tail-biting convolutional coding.

Example 7

Figure 15 is a schematic block diagram of a station for transmitting an identifier in a wireless local area network according to Embodiment 7 of the present invention. The site 1500 includes a processor 1510, a memory chip 1520, a baseband chip 1530, a radio frequency chip 1540, and an antenna 1550.

The processor 1510 controls the operation of the station 1500. The memory 1520 can include read only memory and random access memory and provides instructions and data to the processor 1510, which can be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic. Device. A portion of memory 1520 may also include non-volatile line random access memory (NVRAM). The baseband chip 1530 is used to synthesize the baseband signal to be transmitted or to decode the received baseband signal. The radio frequency chip 1540 is for modulating a low frequency baseband signal to a high frequency carrier signal, and a high frequency carrier signal is transmitted through the antenna 1550. The radio frequency chip is also used to demodulate the high frequency signal received by the antenna 1550 into a low frequency carrier signal. The various components of station 1500 are coupled together by a bus 1560, which in addition to the data bus includes a power bus, a control bus, and a status signal bus. However, for clarity of description, various buses are labeled as bus system 1560 in the figure. It should be noted that the above description of the site structure can be applied to the subsequent embodiments.

Site 1500 can be the AP or STA1-STA3 shown in FIG. The station in Embodiment 7 acts as a transmitter.

a baseband chip 1530, the partial bit of the identifier sequence for selecting the first information sequence is XORed with the cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

The baseband chip 1530 is further configured to perform a zero- convolutional coding on the first information sequence after performing an exclusive OR operation to obtain a second information sequence.

The baseband chip 1530 is further configured to select an m-bit bit of a predetermined position in the second information sequence, compress the m-bit bit of the specified position of the protocol into an n-bit bit, and n is an even number greater than 0, where m is greater than n;

The baseband chip 1530 is further configured to XOR the compressed n-bit bit with the first n-bit bit of the second information sequence;

The baseband chip 1530 is further configured to delete the m-bit bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in an efficient signaling field HE-SIG of the physical layer protocol data unit PPDU;

The radio frequency chip 1540 is configured to send the third information sequence.

Optionally, the baseband chip selects an m-bit bit of the protocol specified position in the second information sequence, and compresses the m-bit bit of the protocol specified position into n-bit bits, including: in the second information sequence The 12 bits of the location specified by the protocol are compressed into 6 bits.

Optionally, the protocol specifies an m-bit of the location, including: a tail m-bit of the second information sequence.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the baseband chip performs zero- convolutional coding on the information sequence, wherein the identifier sequence is located at the front of the information sequence. Moreover, the baseband chip compresses the tail bits in the information sequence and embeds them into the associated ID for transmission. By the above manner, the overhead of the CRC sequence and the tail bits is reduced, and the efficiency of transmitting the data stream is improved, and compared The tail biting convolutional coding performance is better.

Example 8

The station in Embodiment 8 includes a processor, a memory chip, a baseband chip, a radio frequency chip, and an antenna. The site may be the AP or STA1-STA3 shown in FIG. The station in Embodiment 8 acts as a receiver.

In the process of transmitting an identifier in a wireless local area network, the baseband chip performs a null-OR operation on the sequence of local identifiers and performs a soft exclusive OR operation with the received information sequence to obtain an identifier sequence and a CRC sequence. In this way, the identifier sequence and the CRC sequence can be extracted from the received information sequence, ensuring that the data packet completes the correct transmission with less overhead, and is better than the tail-biting convolutional coding performance.

Example 9

The station in Embodiment 9 includes a processor, a memory chip, a baseband chip, a radio frequency chip, and an antenna. The site may be the AP or STA1-STA3 shown in FIG. The station in Embodiment 9 acts as a transmitter.

The baseband chip is configured to select a partial bit of the identifier sequence of the first information sequence a cyclic redundancy code CRC exclusive OR, wherein the identifier sequence is located at a head of the first information sequence;

The radio frequency chip is configured to send the third information sequence.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the baseband chip performs zero- convolutional coding on the information sequence, wherein the identifier sequence is located at the front of the information sequence. Moreover, the baseband chip transmits the tail bits in the information sequence to the associated ID, and by the above manner, the overhead of the CRC sequence and the tail bits is reduced, the efficiency of transmitting the data stream is improved, and the tail-biting convolution is used. Better coding performance.

Example 10

The station in Embodiment 10 includes a processor, a memory chip, a baseband chip, a radio frequency chip, and an antenna. The site may be the AP or STA1-STA3 shown in FIG. The station in Embodiment 10 acts as a receiver.

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, where The method includes: placing the first sub-sequence to a tail of the first information sequence, and replacing the coding sub-sequence with a first n-bit of the first information sequence;

Example 11

The station in Embodiment 11 includes a processor, a memory chip, a baseband chip, a radio frequency chip, and an antenna. The site may be the AP or STA1-STA3 shown in FIG. The station in Embodiment 11 acts as a transmitter.

And a radio frequency chip, configured to send the third information sequence.

In the embodiment of the present invention, in the process of transmitting an identifier in a wireless local area network, the baseband chip performs zero- convolutional coding on the information sequence, wherein the identifier sequence is located at the front of the information sequence. And, The baseband chip transmits the tail bits in the information sequence to the associated ID. In the above manner, the overhead of the tail bits is reduced, the efficiency of transmitting the data stream is improved, and the encoding performance is better than that of the tail-biting convolution.

Example 12

The station in Embodiment 12 includes a processor, a memory chip, a baseband chip, a radio frequency chip, and an antenna. The site may be the AP or STA1-STA3 shown in FIG. The station in Embodiment 12 acts as a receiver.

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, including: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with the The first n bits of the first information sequence.

In the process of transmitting an identifier in a wireless local area network, the baseband chip performs a soft exclusive OR operation on the sequence of local identifiers and performs a soft exclusive OR operation with the received information sequence to obtain an identifier sequence. The sequence of identifiers is extracted from the received sequence of information, ensuring that the packet is correctly transmitted with less overhead and is better than using tail-biting convolutional coding.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present 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 solutions are described as being modified, or equivalent to some of the technical features are replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

A method for transmitting an identifier, applied to a wireless local area network WLAN, comprising:

Selecting a partial bit of the identifier sequence of the first information sequence to be exclusive OR with a cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

Performing zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence;

Selecting m bits of the specified position in the second information sequence, compressing m bits of the specified position of the protocol into n bits, n being an even number greater than 0, and m is greater than n;

Exchanging the compressed n-bit bits with the first n-bit bits of the second information sequence;

Deleting the m-bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU;

Sending the third sequence of information.
The method according to claim 1, wherein said selecting an m-bit of a predetermined position in said second information sequence, and compressing m-bit bits of said protocol-defined position into n-bit bits comprises: The 12-bit bit of the protocol specified position in the second information sequence is compressed into 6-bit bits.
The method according to claim 2, wherein the protocol specifies an m-bit of a location, comprising: a tail m-bit of the second sequence of information.
A method for transmitting an identifier, applied to a wireless local area network WLAN, comprising:

Receiving a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Encoding a first partial bit in the sequence of local identifiers to obtain a first coding subsequence of n bits, the first partial number of bits being n/2, n being an even number greater than 0;

And performing soft exclusive OR processing on the first coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR processing includes: A soft value is reserved on a corresponding bit of the 0" bit, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Transforming the first sub-sequence of the n-bit to obtain a second sub-sequence of m-bits, where m is An integer greater than 0, m is greater than n;

Transforming the first information sequence to obtain a second information sequence, comprising: replacing the first coding subsequence with a head n bit of the first information sequence, and placing the second subsequence for the first The tail of the sequence of information;

Decoding the second information sequence, and XORing a second partial bit in the local identifier sequence with a partial bit of the decoded second information sequence to obtain a CRC sequence;

Determining the decoded second information sequence, comprising: the CRC sequence verification, and comparing the first partial bit in the local identifier sequence with the first n/2 bits of the decoded second information sequence Bit.
A method for transmitting an identifier, applied to a wireless local area network WLAN, comprising:

Selecting a partial bit of the identifier sequence of the first information sequence to be exclusive to the cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

Performing zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence;

Selecting n bits of the location specified by the protocol in the second information sequence, and XORing the n bits of the specified location of the protocol with the first n bits of the second sequence of information, n being an integer greater than 0;

Deleting the n-bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU;

Sending the third sequence of information.
The method of claim 5 wherein said protocol specifies n-bit bits of a location comprising: a tail n-bit of said second sequence of information.
A method for transmitting an identifier, applied to a wireless local area network WLAN, comprising:

Receiving a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Encoding a first partial bit in the sequence of local identifiers to obtain an encoded subsequence of n bits, the first partial number of bits being n/2, n being an even number greater than 0;

And performing soft exclusive OR processing on the coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: “0” in the coding subsequence A soft value is reserved on the corresponding bit of the bit, and the corresponding bit of the "1" bit in the encoding subsequence The soft value is reversed;

Transforming the first information sequence to obtain a second information sequence, comprising: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with a first n bits of the first information sequence Bit

Decoding the second information sequence, and XORing a second partial bit in the local identifier sequence with a partial bit of the decoded second information sequence to obtain a CRC sequence;

Determining the decoded second information sequence, comprising: the CRC sequence verification, and comparing the first partial bit in the local identifier sequence with the first n/2 bits of the decoded second information sequence Bit.
A method for transmitting an identifier, applied to a wireless local area network WLAN, comprising:

Performing zero- convolutional coding on the first information sequence to obtain a second information sequence, wherein the identifier sequence is located at the front of the first information sequence;

Selecting n bits of the location specified by the protocol in the second information sequence, and XORing the n bits of the specified location of the protocol with the first n bits of the second information sequence, n being an integer greater than 0;

Deleting the n-bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in the high-efficiency signaling field HE-SIG of the physical layer protocol data unit PPDU;

Sending the third sequence of information.
The method of claim 8 wherein said protocol specifies n-bit bits of a location, comprising: a tail n-bit of said second sequence of information.
A method for transmitting an identifier, applied to a wireless local area network WLAN, comprising:

Receiving a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

Encoding the sequence of local identifiers to obtain an encoded subsequence of n bits, n being an integer greater than 0;

And performing soft exclusive OR processing on the coding subsequence and the soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: “0” in the coding subsequence A soft value is reserved on a corresponding bit of the bit, and a soft value on a corresponding bit of the "1" bit in the encoded subsequence is inverted;

Transforming the first information sequence to obtain a second information sequence, including: using the first sub The sequence places the tail of the first information sequence, and replaces the coding subsequence with the first n bits of the first information sequence.
A station for transmitting an identifier, applied to a wireless local area network (WLAN), characterized in that it comprises:

a baseband chip, the partial bit of the identifier sequence for selecting the first information sequence is XORed with the cyclic redundancy code CRC, wherein the identifier sequence is located at a head of the first information sequence;

The baseband chip is further configured to perform a zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence;

The baseband chip is further configured to select an m-bit bit of a predetermined position in the second information sequence, compress the m-bit bit of the specified position of the protocol into an n-bit bit, n is an even number greater than 0, and m is greater than n ;

The baseband chip is further configured to XOR the compressed n-bit bit with the first n-bit bit of the second information sequence;

The baseband chip is further configured to delete the m-bit bit of the specified location of the protocol, to obtain a third information sequence, where the third information sequence is located in an efficient signaling field HE-SIG of the physical layer protocol data unit PPDU;

And a radio frequency chip, configured to send the third information sequence.
The station according to claim 11, wherein said baseband chip selects m-bit bits of a protocol-defined position in said second information sequence, and compresses m-bit bits of said protocol-defined position into n-bit bits, including : compressing the 12-bit bits of the predetermined position in the second information sequence into 6-bit bits.
The station according to claim 12, wherein the protocol specifies an m-bit of a location, comprising: a tail m-bit of the second sequence of information.
A station for transmitting an identifier, applied to a wireless local area network (WLAN), characterized in that it comprises:

a radio frequency chip, configured to receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

a baseband chip, configured to encode a first partial bit in the sequence of local identifiers to obtain a first coding subsequence of n bits, wherein the first partial number of bits is n/2, and n is an even number greater than 0;

The baseband chip is further configured to perform a soft exclusive OR processing on the first coding subsequence and a soft value of the first n bits of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes : a soft value is reserved on a corresponding bit of the "0" bit in the coding subsequence, and a soft value on a corresponding bit of the "1" bit in the coding subsequence is inverted;

The baseband chip is further configured to transform the first sub-sequence of the n-bit bit to obtain a second sub-sequence of m-bit bits, where m is an integer greater than 0, and m is greater than n;

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, including: replacing the first coding subsequence with a head n bit of the first information sequence, a second subsequence placing a tail of the first information sequence;

The baseband chip is further configured to decode the second information sequence, and XOR the second partial bit in the local identifier sequence and a partial bit of the decoded second information sequence to obtain a CRC sequence;

The baseband chip is further configured to determine the decoded second information sequence, including: the CRC sequence verification, and compare a first partial bit in the local identifier sequence with the decoded second The first n/2 bits of the information sequence.
A station for transmitting an identifier, applied to a wireless local area network (WLAN), characterized in that it comprises:

The baseband chip, the partial bit of the identifier sequence for selecting the first information sequence is XORed with the cyclic redundancy code CRC, wherein the identifier sequence is located at the head of the first information sequence;

The baseband chip is further configured to perform a zero- convolutional coding on the first information sequence after performing the XOR operation to obtain a second information sequence;

The baseband chip is further configured to select an n-bit bit of a protocol specified position in the second information sequence, and XOR the n-bit bit of the protocol specified position with the first n-bit bit of the second information sequence, where n is An integer greater than 0;

The baseband chip is further configured to delete n bits of the specified location of the protocol to obtain a third information sequence, where the third information sequence is located in an efficient signaling field HE-SIG of the physical layer protocol data unit PPDU;

The radio frequency chip is configured to send the third information sequence.
The station according to claim 15, wherein said protocol specifies n-bit bits of a location, comprising: a tail n-bit of said second sequence of information.
A site for transmitting identifiers, applied to a wireless local area network WLAN, characterized by Yes, including:

a radio frequency chip, configured to receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

a baseband chip, configured to encode a first partial bit in a sequence of local identifiers to obtain an encoded subsequence of n bits, wherein the first partial number of bits is n/2, and n is an even number greater than 0;

The baseband chip is further configured to perform soft exclusive OR processing on the coding subsequence and a soft value of a first n bit of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: A soft value is reserved on a corresponding bit of the "0" bit in the coding subsequence, and a soft value on a corresponding bit of the "1" bit in the coding subsequence is inverted;

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, including: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with the The first n bits of the first information sequence;

The baseband chip is further configured to decode the second information sequence, and XOR the second partial bit in the local identifier sequence and a partial bit of the decoded second information sequence to obtain a CRC sequence;

The baseband chip is further configured to determine the decoded second information sequence, including: the CRC sequence verification, and compare a first partial bit in the local identifier sequence with the decoded second The first n/2 bits of the information sequence.
A station for transmitting an identifier, applied to a wireless local area network (WLAN), characterized in that it comprises:

a baseband chip, configured to perform a zero- convolutional coding on the first information sequence to obtain a second information sequence, where the identifier sequence is located at a front portion of the first information sequence;

The baseband chip is further configured to select an n-bit bit of a protocol specified position in the second information sequence, and XOR the n-bit bit of the protocol specified position with the first n-bit bit of the second information sequence, where n is greater than 0 Integer

The baseband chip is further configured to delete n bits of the specified location of the protocol to obtain a third information sequence, where the third information sequence is located in an efficient signaling field HE-SIG of the physical layer protocol data unit PPDU;

And a radio frequency chip, configured to send the third information sequence.
The station according to claim 18, wherein said protocol specifies n-bit bits of a location, comprising: a tail n-bit of said second sequence of information.
A station for transmitting an identifier, applied to a wireless local area network (WLAN), characterized in that it comprises:

a radio frequency chip, configured to receive a first information sequence, where the first information sequence is located in an efficient signaling field HE-SIG of a physical layer protocol data unit PPDU;

a baseband chip for encoding a sequence of local identifiers to obtain an encoded subsequence of n bits, n being an integer greater than zero;

The baseband chip is further configured to perform soft exclusive OR processing on the coding subsequence and a soft value of a first n bit of the first information sequence to obtain a first subsequence, where the soft exclusive OR process includes: A soft value is reserved on a corresponding bit of the "0" bit in the coding subsequence, and a soft value on a corresponding bit of the "1" bit in the coding subsequence is inverted;

The baseband chip is further configured to transform the first information sequence to obtain a second information sequence, including: placing the first subsequence to a tail of the first information sequence, and replacing the coding subsequence with the The first n bits of the first information sequence.