CN117939541A

CN117939541A - Rate indicating method and device based on ultra-bandwidth

Info

Publication number: CN117939541A
Application number: CN202211339517.4A
Authority: CN
Inventors: 钱彬; 刘辰辰; 林伟; 杨讯; 周正春; 唐小虎
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2024-04-26
Also published as: WO2024088072A1

Abstract

A speed indication method and device based on UWB are applied to a WPAN system based on UWB, such as 802.15.4a protocol, 802.15.4z protocol or 802.15.4ab protocol in 802.15 series protocol; the method can also be applied to 802.11ax next generation Wi-Fi protocols such as 802.11be, wi-Fi 7 or EHT, WLAN systems of 802.11 series protocols such as 802.11be next generation, wi-Fi 8 or UHR, sensing systems and the like. The transmitting end generates a PPDU and transmits the PPDU. Correspondingly, the receiving end receives the PPDU and processes the PPDU. The PPDU includes an SFD field and a first field, the SFD field being determined based on a preamble symbol and a first SFD sequence for indicating a rate of the first field, a position of the first field in the PPDU being located after the SFD field.

Description

Rate indicating method and device based on ultra-bandwidth

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for indicating a rate based on an ultrabandwidth.

Background

Ultra Wideband (UWB) technology is a wireless carrier communication technology, for example, data can be transmitted by using non-sinusoidal narrow pulses in nanoseconds, so that the frequency spectrum occupied by the technology is wide. Because of the narrow pulse and low radiation spectrum density, UWB has the advantages of strong multipath resolution, low power consumption, strong confidentiality and the like.

Because of the relatively low spectral energy of ultra-wideband, interference to other wireless communication technologies is small. Ultra wideband can transmit signals without channel listening and is therefore suitable for low delay data transmission. Meanwhile, due to the large communication bandwidth, data with high speed can be transmitted on an ultra-wideband channel. Of course, it is also possible to choose to transmit data at a lower rate in order to increase the transmission distance or to expand the coverage of the device. In general, the transmission rate of data may be configured by way of a static configuration. This may result in data failure when the channel conditions change relatively rapidly. For example, in a wireless body area network (wireless body area network, WBAN) environment, instantaneous 20-25dB channel attenuation may occur due to body blocking of the antenna. Therefore, the data rate is set too high, and when the channel suddenly deteriorates, a problem of communication failure is encountered. Too low a data rate setting can result in too long a data occupation period, causing interference to other devices and applications.

How to flexibly configure the data rate is needed to be solved.

Disclosure of Invention

The embodiment of the application discloses a rate indication method and device based on ultra-bandwidth, which can flexibly indicate rate.

In a first aspect, an embodiment of the present application provides an ultra-wideband based rate indication method, where the method includes:

Generating a physical layer (PHYSICAL LAYER, PHY) protocol data unit (PHY protocol data unit, PPDU) comprising a start-of-FRAME DELIMITER, SFD, field and a first field, the SFD field being determined based on a preamble symbol and a first SFD sequence, the first SFD sequence being used to indicate a rate of the first field, a position of the first field in the PPDU being located after the SFD field; and sending the PPDU.

In the embodiment of the application, the rate of the first field is indicated by using the first SFD sequence corresponding to the SFD field, so that the fields after the preamble symbol and the SFD field can be separated, and the rate of the first field can be indicated. Different SFD sequences indicate different rates of the first field, so that the configuration flexibility of the rate of the first field can be effectively improved.

In one possible implementation, the generating the PPDU includes: acquiring indication information, wherein the indication information comprises first indication information, and the first indication information is used for indicating the rate of indicating the first field through the first SFD sequence; and generating the PPDU based on the first indication information.

In the embodiment of the present application, the first indication information is used to indicate the rate of indicating the first field through the first SFD sequence, that is, the sending end may determine, based on the first indication information, that the sending end may indicate the rate of the first field through the first SFD sequence corresponding to the SFD field. Therefore, through the first indication information, the transmitting end can clearly know the rate that the transmitting end can indicate the first field by using the SFD sequence corresponding to the SFD field in the PPDU, and the communication efficiency is improved.

In one possible implementation, the method further includes: and acquiring indication information, wherein the indication information comprises second indication information, and the second indication information is used for indicating the rate of configuring the first field in an out-of-band (out-ofband, OOB) mode.

In the embodiment of the application, through the second indication information, the sending end can acquire the rate of the first field which needs to be configured in an OOB mode, so that the configuration mode of the rate of the first field can keep backward compatibility.

The transmitting the PPDU includes: the first field is sent based on a rate of the first field indicated by the first SFD sequence.

In the embodiment of the application, the transmitting end can determine the SFD sequence (such as the first SFD sequence) corresponding to the SFD field and the rate of the first field based on the corresponding relation between the SFD sequence and the rate of the first field. It can be appreciated that the embodiment of the present application is not limited to the sequence of determining the first SFD sequence and determining the rate of the first field by the transmitting end. Different SFD sequences are used for indicating different rates of the first field, so that the purpose of flexibly indicating the rates of the first field is effectively achieved.

In a second aspect, an embodiment of the present application provides a method for indicating a rate based on an ultrabandwidth, where the method includes:

Receiving a PPDU, the PPDU comprising a frame start separator, SFD, field and a first field, the SFD field determined based on a preamble symbol and a first SFD sequence, the first SFD sequence being for indicating a rate of the first field, a position of the first field in the PPDU being located after the SFD field; and processing the PPDU.

In the embodiment of the application, the rate of the first field is indicated by using the first SFD sequence corresponding to the SFD field, so that the receiving end can not only effectively distinguish the fields after the preamble symbol and the SFD field based on the SFD sequence, but also effectively acquire the rate of the first field corresponding to the first SFD sequence. Different SFD sequences indicate different rates of the first field, so that the configuration flexibility of the rate of the first field can be effectively improved.

In one possible implementation, the processing the PPDU includes: determining the first SFD sequence based on the preamble symbol and the SFD field; determining the rate of the first field corresponding to the first SFD sequence based on the corresponding relation between the SFD sequence and the rate of the first field; demodulating the first field based on a rate of the first field.

In the embodiment of the application, both communication parties can store the corresponding relation between the SFD sequence and the rate of the first field. By storing the correspondence, the receiving end can effectively acquire the rate of the first field corresponding to the first SFD sequence.

With reference to the first aspect or the second aspect, in one possible implementation manner, the first SFD sequence is one SFD sequence of M SFD sequences, each SFD sequence of the M SFD sequences corresponds to one rate of the first field, and at least two different rates of M rates corresponding to the M SFD sequences, where M is an integer greater than or equal to 2.

In the embodiment of the application, the receiving end can effectively distinguish the fields after the preamble symbol and the SFD field through any SFD sequence in the M SFD sequences and the SFD field determined by the preamble symbol, thereby effectively improving the distinguishing efficiency of the receiving end.

With reference to the first aspect or the second aspect, in a possible implementation manner, each SFD sequence of the M SFD sequences corresponds to a different rate of the first field.

In the embodiment of the application, each SFD sequence in the M SFD sequences corresponds to different rates, so that the receiving end can effectively determine the corresponding unique rate based on any SFD sequence in the M SFD sequences, and the rate determining efficiency is improved.

With reference to the first aspect or the second aspect, in a possible implementation manner, the M rates are included in a rate set, where the rate set is a predefined set.

In the embodiment of the application, M rates corresponding to the M SFD sequences are contained in the rate set, so that the communication parties agree on the corresponding relation between the SFD sequences and the rates based on the rate set.

With reference to the first aspect or the second aspect, in a possible implementation manner, the indicating, by the first SFD sequence, a rate of the first field includes: the first SFD sequence is used for indicating the value of the speed of the first field; or alternatively

The first SFD sequence is used to indicate an offset of the rate of the first field from a reference rate.

In the embodiment of the application, the first SFD sequence is used for indicating the value of the speed of the first field, and the mode is simpler. The first SFD sequence is used for indicating the offset of the rate of the first field and the reference rate, and when the corresponding relation between the SFD sequences and the rates stored by the two communication parties is adopted in the mode, the occupied storage space is small.

With reference to the first aspect or the second aspect, in one possible implementation manner, the length of the first SFD sequence is L, and the first SFD sequence is any one of the following tables:

With reference to the first aspect or the second aspect, in a possible implementation manner, the first SFD sequence is further used to indicate a type of the PPDU, where the type of the PPDU includes at least one of the following: the PPDU is used for sensing or the PPDU is used for ranging.

With reference to the first aspect or the second aspect, in one possible implementation manner, the first field includes a physical layer header (PHYSICAL LAYER HEADER, PHR) field.

In general, the rate of the PHR field may be configured by means of OOB. However, when configured by means of OOB, PHR rate setting is too high, and when a channel suddenly deteriorates, a problem of communication failure is encountered. If the PHR rate is set too low, the data occupation time is too long, which causes interference to other devices and applications.

In the embodiment of the application, the PHR rate (namely the rate of the PHR field) is indicated by the SFD sequence, so that the flexibility of indicating the PHR rate can be effectively improved. Meanwhile, the occupied time of the PHR field is not increased, and interference to other devices and applications is avoided.

With reference to the first aspect or the second aspect, in a possible implementation manner, the PPDU further includes a frame Synchronization (SYNC) field, where the frame synchronization field is used to carry the preamble symbol.

With reference to the first aspect or the second aspect, in a possible implementation manner, the M SFD sequences are determined based on at least one of the following:

Determining, based on autocorrelation side lobes of the SFD sequence, an autocorrelation of the SFD sequence being an autocorrelation of a first sequence with the SFD sequence, the first sequence being determined based on a preamble symbol with the SFD sequence; determining a cross-correlation side lobe based on a first sequence and a first SFD sequence of the M SFD sequences, the first sequence determined based on a preamble symbol and a second SFD sequence of the M SFD sequences; determining an autocorrelation main lobe based on the SFD sequence; the method further includes determining based on a cross-correlation main lobe of the first sequence and a first SFD sequence of the M SFD sequences, the first sequence determined based on a preamble symbol and a second SFD sequence of the M SFD sequences.

With reference to the first aspect or the second aspect, in a possible implementation manner, the M sequences satisfy at least one of the following:

The root mean square of the autocorrelation sidelobe amplitude of the SFD sequence is smaller than that of the autocorrelation sidelobe amplitude of other sequences, and the other sequences are other sequences except the M sequences in 2 ^L sequences; the root mean square of the cross-correlation side lobe amplitude of the first sequence and the first SFD sequence is smaller than that of the cross-correlation side lobe amplitude of a second sequence and a first other sequence in the other sequences, and the second sequence is determined based on the second other sequences in the other sequences and a preamble symbol; the difference between the auto-correlation main lobe amplitude of the SFD sequence and the maximum amplitude in the auto-correlation side lobe amplitudes of the SFD sequence is greater than or equal to a first threshold.

In the embodiment of the application, M sequences are determined from 2 ^L sequences to serve as SFD sequences in an autocorrelation or autocorrelation mode, so that the performance of the SFD sequences can be effectively improved, and a receiving end can more effectively distinguish the preamble symbol from the SFD field later field.

In a third aspect, embodiments of the present application provide a communication device for performing the method of the first aspect or any possible implementation of the first aspect. The communication device comprises a unit with means for performing the method of the first aspect or any possible implementation of the first aspect.

In a fourth aspect, embodiments of the present application provide a communications apparatus for performing the method of the second aspect or any possible implementation of the second aspect. The communication device comprises a unit with means for performing the second aspect or any possible implementation of the second aspect.

In the third or fourth aspect, the communication apparatus and the communication apparatus described above may include a transceiver unit and a processing unit. Reference may also be made to the device embodiments shown below for a specific description of the transceiver unit and the processing unit.

In a fifth aspect, an embodiment of the present application provides a communication device, which includes a processor configured to perform the method described in the first aspect or any possible implementation manner of the first aspect. Or the processor is configured to execute a program stored in the memory, which when executed, performs the method of the first aspect or any possible implementation of the first aspect.

In one possible implementation, the memory is located outside the communication device.

In one possible implementation, the memory is located within the communication device.

In the embodiment of the application, the processor and the memory may also be integrated in one device, i.e. the processor and the memory may also be integrated together.

In one possible implementation, the communication device further comprises a transceiver for receiving signals or transmitting signals.

In a sixth aspect, an embodiment of the present application provides a communications device, including a processor configured to perform the method of the second aspect or any possible implementation manner of the second aspect. Or the processor is configured to execute a program stored in the memory, which when executed, performs the method of the second aspect or any possible implementation of the second aspect.

In embodiments of the present application, the processor and the memory may also be integrated in one device, i.e. the processor and the memory may also be integrated together.

In a seventh aspect, embodiments of the present application provide a communication device comprising logic circuitry and an interface, the logic circuitry and the interface being coupled; the logic circuit is used for generating a PPDU; and the interface is used for outputting the PPDU.

In an eighth aspect, embodiments of the present application provide a communication device comprising logic circuitry and an interface, the logic circuitry and the interface being coupled; the interface is used for inputting a PPDU; the logic circuit is used for processing the PPDU.

In a ninth aspect, embodiments of the present application provide a computer readable storage medium for storing a computer program which, when run on a computer, causes the method of the first aspect or any of the possible implementations of the first aspect to be performed.

In a tenth aspect, embodiments of the present application provide a computer readable storage medium for storing a computer program which, when run on a computer, causes the method of the second aspect or any of the possible implementations of the second aspect described above to be performed.

In an eleventh aspect, embodiments of the present application provide a computer program product comprising a computer program which, when run on a computer, causes the method shown in the first aspect or any of the possible implementations of the first aspect to be performed.

In a twelfth aspect, embodiments of the present application provide a computer program product comprising a computer program which, when run on a computer, causes the method shown in the second aspect or any of the possible implementations of the second aspect described above to be performed.

In a thirteenth aspect, embodiments of the present application provide a computer program which, when run on a computer, performs the method of the first aspect or any possible implementation of the first aspect.

In a fourteenth aspect, embodiments of the present application provide a computer program which, when run on a computer, performs the method of the second aspect or any of the possible implementations of the second aspect.

In a fifteenth aspect, an embodiment of the present application provides a wireless communication system, where the wireless communication system includes a transmitting end and a receiving end, where the transmitting end is configured to perform a method as in the first aspect or any possible implementation manner of the first aspect, and the receiving end is configured to perform a method as in the second aspect or any possible implementation manner of the second aspect.

The technical effects achieved by the third aspect to the fifteenth aspect may refer to the technical effects of the first aspect or the second aspect or advantageous effects in the method embodiments shown below, and the description thereof will not be repeated here.

Drawings

Fig. 1a is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 1b is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a PPDU according to an embodiment of the present application;

Fig. 3 is a schematic diagram of a preamble symbol according to an embodiment of the present application;

FIG. 4 is a schematic flow chart of a UWB based rate indication method provided by an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described with reference to the accompanying drawings.

The terms first and second and the like in the description, the claims and the drawings of the present application are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. Such as a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the list of steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the present application, "at least one (item)" means one or more, "a plurality" means two or more, "at least two (items)" means two or three and more, "and/or" for describing an association relationship of an association object, and three kinds of relationships may exist, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. "or" means that there may be two relationships, such as only a, only B; where A and B are not mutually exclusive, it may also be indicated that there are three relationships, such as only A, only B, and both A and B. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of (a) or a similar expression thereof means any combination of these items. For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c".

The technical scheme provided by the embodiment of the application can be suitable for the WPAN based on UWB technology. The method provided by the embodiment of the application can be suitable for IEEE802.15 series protocols, such as 802.15.4a protocol, 802.15.4z protocol or 802.15.4ab protocol, or future generation UWB WPAN standard and the like, and is not listed here. Or the technical scheme provided by the embodiment of the application can be also applied to WLAN, such as IEEE802.11 series protocols in Wi-Fi, for example, 802.11a/b/g protocols, 802.11n protocols, 802.11ac protocols, 802.11ax protocols, 802.11be protocols or protocols of the next generation, etc., which are not listed here again. The technical solution provided by the embodiment of the application can support Wi-Fi7, which can be called as ultra high throughput (EHT), wi-Fi8, which can be called as ultra high reliability (ultra highreliability, UHR) or ultra high reliability and throughput (ultra highreliability and throughput, UHRT), and the like. Or the method provided by the embodiment of the application can be also applied to various communication systems, such as an internet of things (internet of things, ioT) system, a Vehicle to X (V2X), a narrowband internet of things (narrow band internet of things, NB-IoT) system, devices in the internet of vehicles, internet of things nodes, sensors and the like in the internet of things (IoT, internet of things), intelligent cameras in smart homes, intelligent remote controllers, intelligent water meter meters, sensors in smart cities and the like. The method can also be applied to an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD) system, a long term evolution (long term evolution, LTE) system, a fifth generation (5 th-generation, 5G) communication system, a sixth generation (6 th-generation, 6G) communication system and the like.

UWB technology is a new type of wireless communication technology. The data is transmitted by utilizing non-sinusoidal narrow pulses of nanosecond level, and the impulse pulses with steep rising and falling time are modulated, so that the occupied frequency spectrum range is wide, and the signal has bandwidth of gigahertz (GHz) level. The bandwidth used by UWB is typically above 1 GHz. Because the UWB system can directly transmit impulse sequences without generating sinusoidal carrier signals, the UWB system has the advantages of wide frequency spectrum, low average power, strong multipath resolution, low power consumption, strong confidentiality and the like, and is beneficial to coexistence with other systems, thereby improving the frequency spectrum utilization rate and the system capacity. In addition, in short-range communication applications, the transmit power of the UWB transmitter may typically be less than 1 milliwatt (mW), and in theory, the interference generated by the UWB signal may be equivalent to white noise. This facilitates good coexistence between ultra-wideband and existing narrowband communications. Thus, UWB systems may operate concurrently with Narrowband (NB) communication systems without interfering with each other. The method provided by the embodiment of the application can be implemented by a communication device in a wireless communication system, in one communication device, a module for implementing the function of the UWB system can be called a UWB module (for example, can be used for transmitting UWB pulses), a module for implementing the function of the narrowband communication system can be called a narrowband communication module, and the UWB module and the narrowband communication module can be different devices or chips. Of course, the UWB module and the narrowband communication module may also be integrated on one device or chip, and embodiments of the present application are not limited to implementation of the UWB module and the narrowband communication module in a communication device. By way of example, the PPDU shown in the embodiments of the present application may be transmitted by a UWB module. The indication information may be transmitted by the UWB module, or by a narrowband communication module, etc., which is not limited by the embodiments of the present application. Configuring the PHR rate by means of OOB, which is shown below, can be understood as that the controller transmits the PHR rate through the narrowband communication module before the two communication parties perform UWB communication. By way of example, the indication information shown below may be understood as being transmitted by the controller via the narrowband communication module prior to UWB communication by both parties. The controller may be a sender, a receiver or a PAN coordinator.

Although the embodiments of the present application are mainly described by taking WPAN as an example, particularly, a network applied to IEEE 802.15 series standards is described as an example. Those skilled in the art will readily appreciate that aspects of embodiments of the present application may be extended to other networks employing a variety of standards or protocols. Such as wireless local area networks (wireless local area networks, WLAN), BLUETOOTH (BLUETOOTH), high performance wireless LANs (high performance radio LAN, HIPERLAN), a wireless standard similar to the IEEE 802.11 standard and used primarily in europe, and Wide Area Networks (WANs) or other now known or later developed networks. Accordingly, the various aspects provided by embodiments of the present application may be applicable to any suitable wireless network, regardless of the coverage area and wireless access protocol used.

The method provided by the embodiment of the application can be realized by a communication device in a wireless communication system. The communication device may be a device involved in a UWB system. For example, the communication device may include, but is not limited to, a communication server, router, switch, bridge, computer, cell phone, and the like. As another example, the communication device may include a central control point, such as a personal area network (personal area network, PAN) or PAN coordinator, or the like. As another example, the communication apparatus may include a User Equipment (UE) that may include various handheld devices, in-vehicle devices, wearable devices, internet of things (internet of things, ioT) devices, computing devices, or other processing devices connected to a wireless modem, etc., which are not further listed herein. As another example, the communication device may include a chip, which may be provided in a communication server, a router, a switch, a user terminal, or the like, which is not listed here.

By way of example, fig. 1a and 1b are schematic diagrams of a communication system according to an embodiment of the present application. Fig. 1a is a star topology provided by an embodiment of the present application, and fig. 1b is a point-to-point topology provided by an embodiment of the present application. As shown in fig. 1a, in a star topology, a central control node may communicate data with one or more other devices. As shown in fig. 1b, data communication between different devices is possible in a point-to-point topology. In fig. 1a and 1b, both the full function device (full function device) and the low function device (reduced function device) can be understood as the communication apparatus shown in the present application. Wherein the full function device is relatively speaking with the low function device, such as the low function device cannot be a PAN coordinator (coordinator). As another example, a low-function device may have no coordination capability or a communication rate lower than a full-function device, etc. It will be appreciated that the PAN coordinator shown in fig. 1b is only an example, and that the other three full function devices shown in fig. 1b may also be used as PAN coordinators, which are not shown here.

It can be understood that the full-function device and the low-function device shown in the embodiments of the present application are only one example of a communication apparatus, and all that is required is that the communication apparatus can implement the method provided by the embodiments of the present application are within the protection scope of the embodiments of the present application.

Fig. 2 is a schematic structural diagram of a PPDU according to an embodiment of the present application. As shown in fig. 2, the PPDU may include a frame Synchronization (SYNC) field, a start-of-FRAME DELIMITER (SFD) field, a physical layer header (PHYSICAL LAYER HEADER, PHR) field, and a physical bearer (PHY payload) (or referred to as physical payload) field; or the PPDU may include a SYNC field, an SFD field, a scrambling time stamp sequence (scrambled timestamp sequence, STS) field, a PHR field, and a physical bearer field; or the PPDU includes a SYNC field, an SFD field, and an STS field. It is understood that the PPDU shown in fig. 2 is only an example, and embodiments of the present application are not limited with respect to the order of fields in the PPDU. However, regardless of how the structure of the PPDU is changed, the PPDU includes an SFD field or a field having a function similar to that of the SFD field.

Illustratively, the SYNC field may be used for channel measurements, signal synchronization, and the like. The SFD field may be used to separate the SYNC field from the subsequent, e.g., the SFD field may be used to separate the SYNC field from the PHR field, and the SFD field may be used to separate the SYNC field from the STS field, etc., which are not listed one by one. The PHR field may be used to indicate some parameters required for demodulating the physical bearer field, such as length information of the physical bearer field, data transmission rate, coding type, etc., to assist the receiving end of the PPDU in correctly demodulating data. The physical bearer field may be used to carry data. The STS field may be used for safe ranging. Specific description of the SYNC field and the SFD field may be described with reference to the terminology shown below.

From the above, it can be seen that in order to ensure accurate demodulation of the data carried in the physical carrier field, proper demodulation of the PHR field must be ensured. In general, the lower the data rate, the more reliable the corresponding data, and the easier the receiving end demodulates correctly. Exemplary data rates for the physical bearer fields include 1.95mbps,7.8mbps,31.2mbps,62.4mbps,128.4mbps. Thus, in general, the PHR field corresponds to a smaller rate than the physical bearer field.

In the current method, the rate of the PHR field may be statically configured in an out of band (OOB) manner. The rate at which the PHR field is configured, e.g., by OOB, may be as follows: before the UWB connection is established, the communicating parties may first communicate in a narrowband, through which the rate of the PHR field is determined. The narrowband may include bluetooth, or a narrowband specifically serving UWB in the 802.15.4ab protocol, etc., and embodiments of the application are not limited in this regard. Generally, the rate of the PHR field is fixed before the UWB connection is broken; or the rate of the PHR field is fixed until no new rate is indicated again. The PHR field rate is statically configured by means of OOB, and flexibility is lacking. Such as a static configuration, is limited in frequency so that parameters of the static configuration do not change over time. Thus, when configured by means of OOB, the PHR rate is set too high, and when the channel suddenly deteriorates, a problem of communication failure is encountered. If the PHR rate is set too low, the data occupation time is too long, which causes interference to other devices and applications.

In view of this, the embodiment of the application provides a rate indication method and device based on ultra-bandwidth, which can effectively improve the flexibility of rate configuration. By way of example, the method provided by the embodiment of the application can improve the flexibility of rate configuration of the PHR field.

Before describing the flow of the method shown in fig. 4, the following describes terms related to embodiments of the present application.

1. Rate of speed

The rate may be understood as a transmission rate of the PPDU when both parties transmit the PPDU, such as a transmission rate of a PHR field in the PPDU, or a transmission rate of a physical bearer field in the PPDU, etc. The rate may also be referred to as throughput and represents the number of bits transmitted in a unit time, e.g., the unit time may include seconds(s), etc. Illustratively, the unit of rate may be bps.

2. Frame synchronization field

The frame synchronization field may be determined by repeated preamble symbols. Each preamble symbol may be extended in the time domain by a preamble sequence (e.g., ipatov sequences) that may include three elements, +1, 0, and-1. Fig. 3 is a schematic diagram of a preamble symbol according to an embodiment of the present application. It is understood that fig. 3 shows only one preamble symbol by way of example, and that the frame synchronization field may be composed of a plurality of preamble symbols shown in fig. 3. Ci (0), ci (1), … Ci (K-1) in FIG. 3 are represented as a preamble sequence of length K (which may also be understood as a preamble sequence comprising K elements), K being an integer greater than 1. Illustratively, k=31, or k=91, or k=127, etc., are not listed. l represents a time domain spreading factor, which means that one element in the preamble sequence can be spread into l elements. Each element in the preamble sequence of length K may be extended to l elements (corresponding to l chips), whereby one preamble symbol may include K x l elements. For example, ci (0) as in the preamble sequence may be extended to Ci (0), 0 … …, omitted from the ellipses are (l-2) 0. It is to be understood that the time domain spreading of the preamble sequence shown herein is only an example, and other time domain spreading may occur with the development of the standard, which is not limited by the embodiment of the present application.

By time domain expansion, the original time of the preamble sequence can be effectively expanded, and the time occupied by the preamble symbol can be widened. T _psym in fig. 3 represents the occupation time of one preamble symbol.

3. SFD field

The SFD field may be determined by a preamble symbol and an SFD sequence. Illustratively, the SFD sequence multiplied by the preamble symbol may be carried in an SFD field in the PPDU. Illustratively, the SFD sequence is [ -1-1 1-1 ], and the SFD field may carry content of [ -preamble symbol ]. The relationship between the SFD sequence, preamble symbol and SFD field shown here is merely an example and should not be construed as limiting the embodiments of the present application.

It is understood that elements in the SFD sequences illustrated by embodiments of the present application may include +1 and-1. Or as standard techniques evolve, the elements in the SFD sequence may include +1, 0, -1. The SFD sequences shown below are each illustrated as including +1 and-1, but should not be construed as limiting the embodiments of the present application.

4. M SFD sequences

The M SFD sequences shown in the embodiment of the present application refer to M SFD sequences that may correspond to the same length L. M may be an integer greater than or equal to 2, and L may be a positive integer. Illustratively, L may be an integer greater than or equal to 4, such as l=4, 8, 16, or 32. For example, m=2, 4, 8, 16, etc., where the values of M and L are merely examples, and should not be construed as limiting the embodiments of the present application. In summary, M <2 ^L.

Illustratively, the M SFD sequences may be as shown in table 1.

TABLE 1

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It is understood that the inverted sequences of the SFD sequences shown in Table 1 also belong to the SFD sequences. That is, the SFD sequences shown in table 1 do not include the inverted sequences of the respective SFD sequences.

Illustratively, in the case where the inverse of the SFD sequences shown in table 1 are also included in M SFD sequences, the M SFD sequences may be as shown in table 2. It is understood that M has values of 2, 4 and 8 for each L in Table 1. In table 2, since table 2 includes not only the SFD sequences shown in table 1 but also the inverse of the SFD sequences shown in table 1, the values of M are 4, 8, and 16 for each L. Table 2 is obtained by inverting the SFD sequence shown in table 1 as an example, however, in the case where the value of L and the value of M are fixed, the SFD sequence which may be different from table 2 may be obtained by the method for determining the SFD sequence shown below or the conditions satisfied by the SFD sequence, which are not listed in the embodiments of the present application.

TABLE 2

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For example, in the case where M corresponding to different L is fixed, if M takes the value shown in table 1 as an example, the sequences shown in table 1 are inverted (i.e. 1 is inverted to-1, -1 is inverted to 1), which may also be understood as M SFD sequences shown in the embodiment of the present application, as shown in table 3. That is, the values of L and M shown in Table 3 are the same as those in Table 1, but all of the M SFD sequences are different.

TABLE 3 Table 3

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It will be appreciated that the SFD sequences shown in Table 3 are merely examples, as other SFD sequences may also be selected from the SFD sequences shown in Table 1 as part of the SFD sequences in Table 3, and the selected SFD sequences may be inverted as sequences of the M SFD sequences.

For convenience of description, the values of M referred to hereinafter are exemplified in tables 1 and 3.

For the same length L, the sequences including the two elements +1 and-1 may have a total of 2 ^L sequences, and the sequences other than the M SFD sequences out of the 2 ^L sequences may be referred to as other sequences. That is, the M SFD sequences shown in the embodiments of the present application can be understood as sequences determined based on some conditions from 2 ^L sequences, M <2 ^L.

Illustratively, the SFD sequence of the M SFD sequences may be determined based on at least one of:

the first term, autocorrelation sidelobe determination based on the SFD sequence.

The autocorrelation of an SFD sequence can be understood as the multiplication of elements of the SFD sequence at different points in time based on the preamble symbol and the sequence determined by the SFD sequence, and the accumulation of the products. The main lobe may be understood as a peak in the autocorrelation result, and the rest of the amplitudes except the main lobe may be referred to as side lobes or side lobes. For example, the main lobe may correspond to the highest value of the amplitude of the autocorrelation result.

Generally, the SFD sequence is located after the preamble symbol, and the basic function of the SFD sequence may be a separator, so the receiving end needs to accurately know the accurate position of the SFD through the peak value of the autocorrelation.

Illustratively, the sequence determined based on the preamble symbol and the SFD sequence includes: and a sequence formed by splicing the full 1 sequence with the length of the repetition number of the preamble symbol and the SFD sequence. For example, if the number of repetition of the preamble symbol is 16 and the SFD sequence is [ -1-1 1-1 ], the sequence formed by splicing the SFD sequence with the full 1 sequence with the length of 16 may be [ 111 111 111 111 111 1-1-1 1-1 ]. In general, after receiving the SYNC field and the SFD field, the receiving end of the PPDU needs to correlate the preamble symbol carried by the SYNC field with the sequence carried in the SFD field, and determine the accurate position of the SFD based on the correlation result. Therefore, the SFD sequence is determined based on the autocorrelation or cross correlation between the sequence determined by the preamble symbol and the SFD sequence, so that the probability of false detection of the receiving end can be effectively reduced, and the receiving end can be effectively ensured to know the accurate position of the SFD. Illustratively, the number of repetitions of the preamble symbol may be 16, 32, 64, etc., and are not listed.

It is to be appreciated that the description of sequences determined based on preamble symbols and SFD sequences shown above applies to sequences determined based on preamble symbols and other sequences. The description of the sequence determined based on the preamble symbol and the other sequence may refer to the description of the sequence determined based on the preamble symbol and the SFD sequence.

For convenience of description, a sequence determined based on the preamble symbol and the SFD sequence will be referred to as a first sequence, and a sequence determined based on the preamble symbol and other sequences will be referred to as a second sequence. It is understood that the autocorrelation of the SFD sequence shown in the embodiments of the present application may be understood as the autocorrelation of the first sequence with the SFD sequence, e.g., the autocorrelation of the first SFD sequence may be understood as the autocorrelation between the first sequence determined based on the preamble symbol and the first SFD sequence. The cross-correlation of SFD sequences shown in the embodiments of the present application may be understood as a cross-correlation between a first sequence and a first SFD sequence determined based on a preamble symbol and a second SFD sequence. The first SFD sequence and the second SFD sequence are each SFD sequences of the M SFD sequences. The autocorrelation of the other sequence may be understood as an autocorrelation of the second sequence with the other sequence, such as an autocorrelation between the second sequence and the first other sequence determined based on the preamble symbol and the other sequence. The cross-correlation of the other sequences shown in the embodiments of the present application may be understood as a cross-correlation between the second sequence and the first other sequence determined based on the preamble symbol and the second other sequence. The first other sequences and the second other sequences are other sequences, and the number of the other sequences can be 2 ^L -M.

As one example, the root mean square of the autocorrelation sidelobe amplitudes of the SFD sequences is smaller than the root mean square of the autocorrelation sidelobe amplitudes of the other sequences. It will be appreciated that the number of SFD sequences is the same as the number of other sequences when comparing root mean square or sum of squares, etc.

Illustratively, the root mean square x _RMS of the autocorrelation sidelobe amplitudes of the SFD sequence may satisfy the following formula:

Where x ₁,x₂…x_C can be understood as the autocorrelation sidelobe amplitudes of the SFD sequence. In general, the number of side lobes of the cross-correlation of a sequence of length N1 with a sequence of length N2 may be N1+N2-1, and likewise, the number of side lobes of the auto-correlation of a sequence of length N1 with a sequence of length N2 may be N1 +N2-1.

For example, m=4, there are four SFD sequences ABCD, and the root mean square of the autocorrelation sidelobe amplitudes of these four sequences is smaller than the root mean square of the autocorrelation sidelobe amplitudes of four other sequences (four sequences arbitrarily selected from 2 ^L -4 sequences).

As another example, the sum of squares of the autocorrelation sidelobe amplitudes of the SFD sequences is smaller than the sum of squares of the autocorrelation sidelobe amplitudes of the other sequences. That is, the sum of squares of the autocorrelation sidelobe amplitudes of each of the M SFD sequences is smaller than the sum of squares of the autocorrelation sidelobe amplitudes of the other sequences.

As yet another example, the sum of the absolute values of the autocorrelation sidelobe amplitudes of the SFD is smaller than the sum of the absolute values of the autocorrelation sidelobe amplitudes of the other sequences. That is, the sum of the absolute values of the autocorrelation sidelobe amplitudes of each of the M SFD sequences is smaller than the sum of the absolute values of the autocorrelation sidelobe amplitudes of the other sequences.

The second term is determined based on cross-correlation side lobes between the first sequence and the first SFD sequence.

Cross-correlation is understood to mean the multiplication of elements of one sequence with another at different points in time, and the accumulation of products. By way of example, one sequence and another sequence shown in the embodiments of the present application may be understood as a first sequence and a first SFD sequence; or the second sequence and the first other sequence.

As one example, the root mean square of the cross-correlation side lobe amplitudes of the first sequence and the first SFD sequence is less than the root mean square of the cross-correlation side lobe amplitudes of the second sequence and the first other sequences. It will be appreciated that the number of SFD sequences is the same as the number of other sequences when comparing root mean square or sum of squares, etc.

For example, m=4, there are four SFD sequences ABCD, and the root mean square of the cross-correlation side lobe amplitudes of these four sequences is smaller than the root mean square of the autocorrelation side lobe amplitudes of any selected four of 2 ^L -4 sequences. The amplitudes of the cross-correlation side lobes of the four sequences include: a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by A and B, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by A and C, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by A and D, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by B and C, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by B and D, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by C and A, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by C and D, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by D and B, a cross-correlation side lobe amplitude based on the preamble symbol and the sequence determined by D and a side lobe amplitude of C.

As another example, the sum of squares of cross-correlation side lobe amplitudes of the first sequence and the first SFD sequence is less than the sum of squares of cross-correlation side lobe amplitudes of the second sequence and the first other sequence.

As yet another example, the sum of the absolute values of the cross-correlation side lobe amplitudes of the first sequence and the first SFD sequence is less than the sum of the absolute values of the cross-correlation side lobe amplitudes of the second sequence and the first other sequence.

The first term shown above may be combined with the second term, i.e., the root mean square of the autocorrelation side lobe amplitudes of the SFD sequences and the root mean square of the cross-correlation side lobe amplitudes of the SFD sequences are both the smallest, for example, the performance of the M SFD sequences shown in the embodiments of the present application.

Taking l=16, m=4 as an example, four SFD sequences can be as follows ：[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,-1]、[-1,-1,1,1,-1,-1,-1,1,1,1,1,1,1,-1,1,-1]、[-1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,1,1,-1]、[-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1,-1,1].

The RMS was calculated as shown in table 10a below:

Table 10a

RMS	x＝a	x＝b	x＝c	x＝d
					Prem+a&x	2.4097	2.7139	2.6904	2.8508
Prem+b&x	3.1472	2.0635	2.5198	2.6667
					Prem+c&x	3.1673	2.6186	1.9344	2.7832
Prem+d&x	2.9059	2.7255	2.7021	2.4230

Prem +a denotes the sequence determined based on the preamble symbol and sequence a, and so on, .a＝[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,-1],b＝[-1,-1,1,1,-1,-1,-1,1,1,1,1,1,1,-1,1,-1],c＝[-1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,1,1,-1],d＝[-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1,-1,1]. table 10a shows an average RMS of 2.6451.

Four other sequences are optionally selected from the 2 ¹⁶ sequences corresponding to l=16, as shown below ：[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,1]、[-1,-1,1,1,-1,-1,-1,1,1,1,1,1,1,-1,1,1]、[-1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,1,1,1]、[-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1,-1,-1].

The RMS was calculated as shown in table 10b below:

TABLE 10b

RMS	x＝a	x＝b	x＝c	x＝d
					Prem+a&x	2.4887	3.2660	3.2269	2.6904
Prem+b&x	2.9601	2.8960	3.0026	3.0026
					Prem+c&x	2.9385	3.0654	2.5903	2.7139
Prem+d&x	2.9708	3.1972	3.0342	2.4495

The average RMS for the RMS shown in table 10b is 2.9058. Thus, it can be illustrated that the performance of the M SFD sequences provided by the embodiments of the present application is better than other sequences.

And third term, determining the autocorrelation main lobe based on the SFD sequence.

Illustratively, the difference between the auto-correlation main lobe amplitude of the SFD sequence and the maximum amplitude of the auto-correlation side lobe amplitudes of the SFD sequence is greater than or equal to a first threshold.

It is understood that the maximum amplitude in the autocorrelation sidelobe amplitudes shown herein can be understood as the maximum positive sidelobe amplitude in the autocorrelation sidelobe amplitudes.

A fourth term is determined based on a cross-correlation main lobe between the first sequence and the first SFD sequence.

Illustratively, the difference between the auto-correlation main lobe amplitude and the maximum amplitude of the cross-correlation side lobe amplitudes is greater than or equal to the second threshold. The autocorrelation main lobe amplitude refers to the autocorrelation main lobe amplitude of the SFD sequence, and the cross-correlation refers to the cross-correlation of the first SFD sequence with the first sequence.

It will be appreciated that the M SFD sequences illustrated by embodiments of the present application may meet one or more of the conditions illustrated above. The respective determination methods or conditions shown above may be combined with each other.

The determination of M SFD sequences is exemplarily described below.

It should be noted that the determination process of M SFD sequences shown below is only an example. Alternatively, the M SFD sequences may be predefined by a standard, or a preset sequence, or the like. That is, the M SFD sequences shown in the embodiment of the present application are not necessarily all implemented through the following processes. That is, in practical applications, both parties can interact by saving M SFD sequences. The determination process shown below may not exist, but the method shown in fig. 4 is performed by saving M SFD sequences.

And step one, initializing.

Let x ₁,…,x_N denote all possible SFD sequences, n=2 ^L, for the same length L. Let M denote the number of SFD sequences required and let x _l denote the SFD sequences in the current protocol (as shown in Table 7). At initialization, s= { x _l}.x_l may be understood as an element in S, which is the SFD sequence in the current protocol.

Illustratively, the values of M may be as shown in table 1. It will be appreciated that the determination process shown in the embodiments of the present application is illustrated with M SFD sequences including SFD sequences in the current protocol. Of course, the determination procedure shown in the embodiment of the present application is also applicable to M SFD sequences that do not include SFD sequences in the current protocol.

And secondly, circulating iteration.

For i=1, … S and i+.l, let s=s { x _i }, the number of elements in the representation is |s|. Such as the following four cases:

(1) If |S| is less than or equal to M and i < N, the second step is re-executed.

(2) If |S| > M and i < N, then one element is deleted from S (element x _l cannot be deleted) so that the RMS of the autocorrelation side lobe amplitudes of the remaining elements in S and the RMS of the cross correlation side lobe amplitudes of the remaining elements in S are both minimized, and then the second step is performed.

For example, ABCDE is an element in S, m=4, so one element needs to be deleted from ABCDE. There are five cases, ABCD, ACDE, ABDE, ABCE, BCDE. For each case, the RMS of the autocorrelation sidelobes and the RMS of the cross-correlation sidelobes may be calculated separately, thereby finding the group with the smallest RMS of the autocorrelation sidelobes and the RMS of the cross-correlation sidelobes. E.g., the smallest group is ABCD, then element E is deleted.

It is understood that one element shown here may be understood as other sequences shown in the embodiment of the present application, and elements remaining after deleting one element, that is, the remaining elements, may be understood as SFD sequences among the M SFD sequences shown in the embodiment of the present application. It will be appreciated that the description of the autocorrelation of elements and the cross-correlation of elements shown herein may be referred to above in relation to the autocorrelation of SFD sequences and the cross-correlation of SFD sequences, and will not be described in detail herein.

The second step shown above is to remove the excess elements by minimizing the RMS of the auto-correlation side lobe amplitudes and the RMS of the cross-correlation side lobe amplitudes of the elements in set S. The second step as described above may also remove the redundant elements by other means, such as by maximizing the minimum distance of the different elements in S. The minimum distance can be understood as the difference between the peak amplitude of the autocorrelation main lobe and the amplitude of the autocorrelation maximum lobe; or the minimum distance may be understood as the difference between the peak amplitude of the autocorrelation main lobe and the amplitude of the cross-correlation maximum lobe. Illustratively, the condition for deleting the redundant element may be: and (3) maximizing the difference value between the autocorrelation main lobe amplitude of different elements in S and the autocorrelation maximum positive side lobe amplitude, and/or maximizing the difference value between the autocorrelation main lobe amplitude of different elements in S and the cross correlation maximum positive side lobe amplitude of different elements.

For example, when l=4, m=2, for i=1, s=s ++χ ₁, |s|=2=m, and 1<S, then iterates. For i=2, s=s { x ₁,x₂ }, s|= 3>M, and 2< n, then delete one element from S, continue the loop iteration until M SFD sequences are output after traversing 2 ⁴ -1=15 elements.

Also for example, when l=4, m=4, for i=1, s=s & { x ₁ }, s|= 2<M, and 1<S, then the loop iterates. For i=2, s=s { x ₁,x₂ }, s|= 3<M, and 2< n, loop iterates. For i=2, s=s { ₁,x₂,x₃ }, s=4=m, and 3<S, iterating through the loop. For i=4, s=s { x ₁,x₂,x₃,x₄ }, s|=5 > m, and 3<N, then one element is deleted from S { x ₁,x₂,x₃,x₄ }, and the satisfaction between the deleted one element and the remaining elements after deletion can be referred to the description of cross-correlation and auto-correlation above, and will not be described in detail here.

(3) If |s| > M and i=n, one element is deleted from S such that RMS of the autocorrelation side lobe amplitudes of the remaining elements in S and RMS of the cross correlation side lobe amplitudes of the remaining elements in S are both minimized, and then the third step is performed.

It will be appreciated from the above (3) that after i has traversed through all possible elements, M SFD sequences can be determined.

(4) In other cases, the third step is performed.

And thirdly, outputting a result. And (5) forming M elements in the S into an SFD sequence set.

By the method, the SFD sequence set can be determined. When M is less than or equal to N, the SFD sequence set meeting the requirement can be effectively determined by the method;

The description of the individual terms shown above applies to the method embodiments shown below.

Fig. 4 is a flow chart of a rate indication method based on ultra-bandwidth according to an embodiment of the present application. The method may be applied to a transmitting end and a receiving end, which may be understood as a relatively speaking communication device, e.g., the transmitting end may be understood as a transmitting end of a PPDU, and the receiving end may be understood as a receiving end of a PPDU.

Illustratively, the transmitting end may include a full function device and the receiving end may include a low function device; for another example, the transmitting end may include a low-function device, and the receiving end includes a low-function device; for another example, the transmitting end comprises low-function equipment, and the receiving end comprises full-function equipment; as another example, both the transmitting end and the receiving end are fully functional devices. It can be understood that the full-function device and the low-function device according to fig. 1a and fig. 1b are only examples, and all devices capable of implementing the method provided by the embodiments of the present application belong to the protection scope of the embodiments of the present application, so the transmitting end and the receiving end shown in the foregoing list should not be construed as limiting the embodiments of the present application. It can be understood that the method provided by the embodiment of the present application is described by using two sides of the sending end and the receiving end, but other devices may exist in the process of transmitting information by the sending end and the receiving end, for example, a forwarding device is used to forward information between the sending end and the receiving end. Therefore, the mutual information transmission in the embodiment of the present application may be implemented by a technical means that can be completed by a person skilled in the art, and the embodiment of the present application is not limited to other devices except the transmitting end and the receiving end.

As shown in fig. 4, the method may include:

401. the transmitting end generates a PPDU.

The PPDU includes an SFD field determined based on a preamble symbol and a first SFD sequence for indicating a rate of the first field located after the SFD field in the PPDU. For the description of the SFD field, reference is made to the above and will not be described in detail here. The first SFD sequence shown in the embodiment of the present application is only an example, and the first SFD sequence represents an SFD sequence used for determining an SFD field in the PPDU.

Illustratively, the first field may include at least one of a PHR field, an STS field, a physical bearer field. For convenience of description, the method shown in fig. 4 will be described below by taking an example in which the first field includes a PHR field. For the description of the STS field and the physical bearer field, etc., reference may be similarly made to the description of the PHR field.

Illustratively, each of the M SFD sequences corresponds to one rate of the first field, and at least two different rates of the M rates corresponding to the M SFD sequences. That is, each of the M SFD sequences may correspond to one rate, and at least two different rates may be used in the rate corresponding to each of the M SFD sequences; or at least two of the rates corresponding to each of the M SFD sequences may be the same, but not exactly the same. For example, each of the M SFD sequences corresponds to a different rate of the first field. As another example, there may be two rates that are the same for each of the M SFD sequences. Optionally, the rates corresponding to the M SFD sequences may include rates configured by OOB, and the M SFD sequences may include SFD sequences in the current protocol.

M rates corresponding to the M SFDs may be included in the rate set. The rate set may be defined by negotiations between two communication parties, or defined by a standard, etc., and the setting manner of the rate set is not limited in the embodiments of the present application. It can be determined that both communication parties store the rate set, so that flexibility and complexity of PHR field rate configuration are effectively considered.

As an example, each M corresponding to the same length L may have a rate set, i.e., the values of L are the same, the values of M are different, and the rate sets are different. As another example, different M corresponding to the same length L may correspond to one rate set, i.e., the values of L are the same, the values of M are different, and the rate sets are the same. As yet another example, one rate set is for each different length L. That is, the values of L are different, the values of M are different, and the rate set is the same.

As one example, the first SFD sequence for indicating the rate of the PHR field includes: the first SFD sequence is used for indicating the value of the rate of the PHR field. That is, the first SFD sequence may correspond to the rate of the PHR field. Each of the M SFD sequences may correspond to a rate of the PHR field.

Table 4 shows the correspondence between SFD sequences and the rates of PHR fields in table 1. It is understood that PHR rates 1 to 7 shown in table 4 may be the same or different for different M's in the same L. The PHR rates 1 to 7 shown in table 4 may be the same or different from each other. For values of different rates, embodiments of the present application are not limited. Generally, when the value of L is larger for the same L, for example, when the value of l=8, l=16, or l=32, and the value of m is different, the range of possible selection is large due to the larger value of 2 ^L, so that the SFD sequence will not appear the same. However, when the value of L is smaller, for example, l=4, 2 ⁴ =16, since the range of the M SFD sequences can be selected by itself is smaller, the same situation may occur for the SFD sequences, if l=4, the corresponding SFD sequence for m=2 comprises [ -1, 1], l=4, the corresponding SFD sequence for m=4 comprises [ -1, -1, 1], l=4, m=8 the corresponding SFD sequence comprises [ -1, 1]. In this case, the PHR rates corresponding to the same sequence may be the same. Or in the case that a value for indicating M is included in the PPDU, PHR rates corresponding to the same sequence may be different.

For example, the rate of the PHR field may include at least one of: 0.975Mbps,1.95Mbps,3.9Mbps,7.8Mbps,15.6Mbps,31.2Mbps. For example, PHR rate 1 shown in Table 4 may be any one of 0.975Mbps,1.95Mbps,3.9Mbps,7.8Mbps,15.6Mbps,31.2Mbps. As another example, PHR rate 2 shown in Table 4 may be any of 0.975Mbps,1.95Mbps,3.9Mbps,7.8Mbps,15.6Mbps,31.2Mbps. It will be appreciated that the rate of the PHR field shown herein is merely an example, and that as standards evolve, further rates of the PHR field may be included later, and embodiments of the present application are not limited in this regard. It is understood that the correspondence between the SFD sequences shown in table 4 and the rates of PHR fields is exemplified by the SFD sequences shown in table 1.

TABLE 4 Table 4

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The correspondence between the SFD sequences and PHR rates shown in table 4 is only an example, and the examples shown in table 4 should not be construed as limiting the embodiments of the present application.

It can be understood that, in the SFD sequences of different lengths and the SFD sets of different values of M shown in table 4, the rate of the PHR field according to the OOB configuration can be understood as the rate of using the OOB configuration.

For example, the number of rate sets shown in the embodiment of the present application may be X, where X is an integer greater than or equal to 2, and the X may include OOB configuration, PHR rate 1, PHR rate 2, PHR rate 3, PHR rate 4, PHR rate 5, PHR rate 6, and PHR rate 7 shown in table 4. When the value of M is 2 or 4, that is, the number of rates in the rate set is greater than the number of SFD sequences, both communication parties can instruct PHR sequences corresponding to the M SFD sequences in a narrowband manner. That is, both parties to the communication may agree on the PHR rate that may be indicated by the SFD sequence through the OOB.

Table 5 shows the correspondence between SFD sequences and the rates of PHR fields, as exemplified in table 3. Tables 5 and 6 show two ways in which the SFD sequence corresponds to the rate of the PHR field, and the SFD sequence shown in table 5 may correspond to a certain rate, and the rate corresponding to the SFD sequence shown in table 6 needs to be determined based on the rate configured by OOB. The relevant description for tables 5 and 6 may refer to table 4 and will not be described in detail here. The SFD sequences 0 to 4 shown in Table 6 are only examples. Table 6 may be understood as adjusting the PHR rate configured through OOB in an indirect manner. That is, the PHR rate may be configured in a narrowband manner prior to UWB communication, and during UWB communication, the PHR rate may be indicated by an SFD sequence as being higher than a rate configured by OOB or lower than a rate configured by OOB.

TABLE 5

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TABLE 6

SFD	Meaning of
		SFD sequence 0	According to OOB configuration
SFD sequence 1	Configuring a rate one gear higher than the PHR rate of the OOB configuration
		SFD sequence 2	Configuring a PHR rate higher than the OOB configured rate by a second gear
SFD sequence 3	Configuring a rate one gear lower than the PHR rate of the OOB configuration
		SFD sequence 4	Configuring a PHR rate lower than the OOB configured rate by a second gear

For example, PHR rate configured in OOB is 7.8Mbps, the first-gear rate is 15.6Mbps, the second-gear rate is 31.2Mbps, the first-gear rate is 3.9Mbps, and the second-gear rate is 1.95Mbps.

It will be appreciated that the correspondence between the SFD sequences shown above and the rates of the PHR fields is exemplified in tables 1 and 3 above, and the SFD sequences shown in table 2 may also correspond to the rates of the PHR fields, and are not listed.

As another example, the first SFD sequence for indicating the rate of the PHR field includes: the first SFD sequence is used to indicate an offset of the PHR field rate from a reference rate. That is, the SFD sequence may indicate the PHR rate by indirect indication instead of a specific value of the PHR rate. The reference rate may be a rate configured in OOB, for example, or the reference rate may be a sum of a rate configured in OOB and a floating rate. The embodiments of the present application are not limited to this illustration of the rate of float.

Exemplary, table 7 is an illustration of the correspondence between SFD sequences and PHR rates provided by embodiments of the present application. Offset 0 shown in table 7 represents an offset between the PHR rate corresponding to SFD sequence 0 and the reference rate, offset 1 represents an offset between the PHR rate corresponding to SFD sequence 1 and the reference rate, and so on. For example, if the PHR rate corresponding to the SFD sequence 0 is a rate configured according to OOB, and the reference rate is a rate configured according to OOB, the offset 0 is equal to 0. Offset 1 is equal to the PHR rate-reference rate corresponding to SFD sequence 1, and so on.

TABLE 7

SFD	Meaning of
		SFD sequence 0	Offset 0
SFD sequence 1	Offset 1
		SFD sequence 2	Offset 2
SFD sequence 3	Offset 3
		SFD sequence 4	Offset 4

In some embodiments of the application, the PHR rates corresponding to the SFD sequences may include rates configured in accordance with OOB, as in tables 4-6. In this way, the receiving end can know whether the PHR rate is configured according to OOB or is a newly defined rate through different SFD sequences corresponding to the SFD fields.

In other embodiments of the present application, the PHR rate corresponding to the SFD sequence may not include a rate configured in OOB.

The sending end obtains the indication information, and generates a PPDU based on the first indication information when the indication information is the first indication information, where an SFD sequence corresponding to an SFD field in the PPDU is used to indicate a rate of the PHR field. The first indication information is used for indicating that the SFD sequence has a corresponding relation with the rate of the PHR field. For example, the first indication may be configured by means of OOB, e.g. the communication partner may obtain the first indication before UWB establishes the connection.

Illustratively, table 8 is an illustration of the correspondence between SFD sequences and the rates of PHR fields provided by embodiments of the present application. The PHR rates 0 to 7 in table 8 can be understood as different PHR rates. Table 8 is a correspondence relationship between the SFD sequences shown in table 1 and the rates of the PHR field, and the correspondence relationship between the SFD sequences shown in table 2 or table 3 and the rates of the PHR field can be given in table 8, and is not specifically shown. The description of the SFD sequence with respect to table 8 may refer to table 1, or the description of the correspondence between the SFD sequence shown in table 8 and the rate of PHR field may refer to table 4 or table 5, which will not be described in detail herein.

TABLE 8

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The sending end obtains the indication information, and generates a PPDU based on the second indication information when the indication information is the second indication information, where the rate of the PHR field in the PPDU is configured according to the OOB. The relationship between the rate of the SFD sequence and PHR field may be as shown in table 9.

It can be understood that the sending end obtains the indication information can be understood as: the transmitting end determines the indication information or the transmitting end receives the indication information. After the transmitting end determines the indication information, the indication information may also be transmitted to the receiving end. That is, the transmitting end of the PPDU shown in the embodiment of the present application is not necessarily the transmitting end of the indication information, and the transmitting end of the indication information may be the receiving end of the PPDU, or may be the transmitting end of the PPDU, or may be the control end, such as a PAN coordinator, which is not limited in the embodiment of the present application. The first indication information and the second indication information shown in the embodiment of the application can be configured through OOB. Such as whether SFD sequences are used by OOB configuration to indicate different PHR rates. If not, configuring PHR rate in the manner shown in Table 9; if so, the PHR rate may be indicated by the SFD sequence corresponding to the SFD field based on a correspondence between the SFD sequence and the PHR rate.

TABLE 9

It can be understood that each table shown above is only an example, and is intended to illustrate the correspondence between the SFD sequence and the rate of the PHR field shown in the embodiment of the present application, but specific values of the rate of the PHR field, and specific elements included in the SFD sequence corresponding to the values, are not limited.

In the embodiment of the present application, the first SFD sequence may be used to indicate some physical layer configurations of UWB, such as the type of PPDU, in addition to the rate of the PHR field. I.e. the first SFD sequence is used both to indicate the rate of the PHR field and also to indicate the type of PPDU. Or the first SFD sequence is used only to indicate the rate of the PHR field. Or the first SFD sequence is used only to indicate the type of PPDU.

The method of indicating the type of PPDU through the first SFD sequence is as follows, for example. Such as the type of the PPDU includes the type of the PPDU used for sensing, or the type of the PPDU used for ranging, or the type of the PPDU used for both sensing and ranging. That is, each of the M SFD sequences may correspond to one rate of the PHR field, and may also correspond to a type of packet (packet) including the SFD sequence, where the packet refers to a packet transmitted during ranging or a packet transmitted during sensing. Optionally, in case that the type of the PPDU is for ranging, information for indicating ranging with the STS or ranging with the synchronization field may be further included in the PPDU. In the case that the type of PPDU is for sensing, information for indicating sensing using STS, sensing using a sync field, or sensing using a sensing field (for sensing) may be further included in the PPDU. The information may be indicated by the first SFD sequence, or may be indicated by another field in the PPDU, etc., which is not limited in the embodiment of the present application. For example, the first SFD sequence may be used to indicate the rate of the PHR field, and also to indicate at least one of: the PPDU is used for ranging based on STS, the PPDU is used for ranging based on a synchronization field, the PPDU is used for sensing based on STS, or the PPDU is used for sensing based on a synchronization field, or the PPDU is used for sensing based on a sensing field.

Those skilled in the art will appreciate that more information may be indicated by the SFD sequence, or other information of the physical layer configuration of the PPDU may be indicated by the SFD sequence, and embodiments of the present application are not listed.

402. The transmitting end transmits the PPDU, and the receiving end receives the PPDU correspondingly.

For example, the transmitting end may transmit the PHR field based on a rate of the PHR field indicated by the first SFD sequence.

Illustratively, when the transmitting end transmits the PPDU, the preamble symbol and the SFD field may be transmitted in a burst manner. If 1 can correspond to a positive pulse, -1 to a negative pulse, and 0to no pulse; or-1 for positive pulses and 1 for negative pulses.

It can be understood that before the transmitting end transmits the PPDU, the PPDU may also be modulated, etc., which is not described in detail in the embodiments of the present application.

403. The receiving end processes the PPDU.

Illustratively, the receiving end processes the PPDU includes: the receiving end determines a first SFD sequence based on the preamble symbol and the SFD field; determining PHR rate corresponding to the first SFD sequence based on the corresponding relation between the SFD sequence and the rate of the PHR field; the PHR field is demodulated based on a PHR rate corresponding to the first SFD sequence.

Illustratively, after determining the rate of the PHR field based on the first SFD sequence, the receiving end may learn the relationship between the bits and the pulses based on the rate of the PHR field, thereby demodulating the PHR field. After demodulating the PHR field, the related information of the physical growth field, such as the length information of the physical bearer field, the data transmission rate, and the coding type, can be obtained.

There is also a way to dynamically configure PHR rate through rate header. If the PHR is divided into two parts, PHR1 and PHR2, PHR1 is used as a rate header, and is sent at a fixed lower rate, and less information is carried, such as a rate including at least PHR2 and a physical bearer. PHR2 carries other information in PHR, transmitted at the same rate as the physical bearer portion or at a slightly lower rate than the physical bearer portion. In this way the PHR1 rate is fixed at 1.95Mbps and is encoded using convolutional codes. Thus, when the data rate of the physical bearer is 1.95Mbps and the LDPC code is used, the reliability of PHR1 will be lower than that of the physical bearer, thus becoming a bottleneck of system performance. When the channel environment is good, the occupation duration of PHR1 is too long due to the low code rate, and the total occupation duration of PHR1 and PHR2 exceeds the occupation duration of a single PHR.

According to the embodiment of the application, the rate of the PHR field is indicated through the corresponding relation between the SFD sequence and the rate of the PHR field, so that the rate of the PHR field can be flexibly indicated, the rate of the PHR self-field can be dynamically adjusted based on the rate of the physical bearing part, for example, the rate of the PHR field is determined through the relation between the rate of the physical bearing part and the rate of the PHR field, and then the SFD sequence is determined based on the corresponding relation between the SFD sequence and the rate of the PHR field. If the channel environment is good, the rate of the PHR field can be adjusted to be larger (such as the same rate as the physical bearing field or a lower rate than the physical bearing field), so that the situation that the occupation time of the PHR field is too long is improved.

The following describes a communication device provided by an embodiment of the present application.

According to the embodiment of the application, the communication device is divided into the functional modules according to the embodiment of the method, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation. The communication device according to the embodiment of the present application will be described in detail with reference to fig. 5 to 7.

Fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application, and as shown in fig. 5, the communication device includes a processing unit 501 and a transceiver unit 502.

In some embodiments of the application, the communication device may be a transmitting end or a chip as shown above, which may be applied to a transmitting end or the like. I.e. the communication device may be adapted to perform the steps or functions etc. performed by the sender in the above method embodiments.

A processing unit 501 configured to generate a PPDU; and a transceiver unit 502 for transmitting the PPDU.

The processing unit 501 is specifically configured to obtain indication information, where the indication information includes first indication information, and generate a PPDU based on the first indication information.

Illustratively, the processing unit 501 is further configured to output the PPDU based on the rate of the first field. Such as processing unit 501, may output the PPDU to transceiver unit 502, which is transmitted by transceiver unit 502.

It should be understood that the specific descriptions of the transceiver unit and the processing unit shown in the embodiments of the present application are only examples, and reference may be made to the above method embodiments for specific functions or steps performed by the transceiver unit and the processing unit, which are not described in detail herein.

Multiplexing fig. 5, in other embodiments of the application, the communication device may be the receiving end or a chip in the receiving end or the like as shown above. I.e. the communication device may be adapted to perform the steps or functions etc. performed by the receiving end in the above method embodiments.

Such as a transceiver unit 502, for receiving PPDUs; a processing unit 501, configured to process the PPDU.

Illustratively, the processing unit 501 is specifically configured to determine the first SFD sequence based on the preamble symbol and the SFD field; determining the rate of the first field corresponding to the first SFD sequence based on the corresponding relation between the SFD sequence and the rate of the first field; the first field is demodulated based on a rate of the first field.

In the above embodiments, the description of the first field, the SFD field, the PHR field, the M SFD sequences, the rate of the PHR field, etc. may also refer to the description in the above method embodiments, which are not described in detail herein.

The transmitting end and the receiving end of the embodiment of the application are described above, and possible product forms of the transmitting end and the receiving end are described below. It should be understood that any product having the function of the transmitting end described in fig. 5, or any product having the function of the receiving end described in fig. 5, falls within the scope of the embodiments of the present application. It should also be understood that the following description is only exemplary, and not limiting the product forms of the transmitting end and the receiving end in the embodiments of the present application.

In a possible implementation, in the communications apparatus shown in fig. 5, the processing unit 501 may be one or more processors, the transceiver unit 502 may be a transceiver, or the transceiver unit 502 may also be a transmitting unit and a receiving unit, where the transmitting unit may be a transmitter and the receiving unit may be a receiver, and the transmitting unit and the receiving unit are integrated into one device, such as a transceiver. In the embodiment of the present application, the processor and the transceiver may be coupled, etc., and the embodiment of the present application is not limited to the connection manner of the processor and the transceiver. In performing the above method, the process of transmitting information in the above method may be understood as a process of outputting the above information by a processor. When outputting the information, the processor outputs the information to the transceiver for transmission by the transceiver. This information, after being output by the processor, may also require additional processing before reaching the transceiver. Similarly, the process of receiving information in the above method may be understood as a process in which a processor receives input of the above information. When the processor receives the input information, the transceiver receives the information and inputs it to the processor. Further, after the transceiver receives the information, the information may need to be further processed before being input to the processor.

As shown in fig. 6, the communication device 60 includes one or more processors 620 and a transceiver 610.

Illustratively, when the communication device is configured to perform the steps or methods or functions performed by the transmitting end, the processor 620 is configured to generate a PPDU; and a transceiver 610 for transmitting the PPDU.

The processor 620 is specifically configured to obtain indication information, where the indication information includes first indication information, and generate a PPDU based on the first indication information.

The processor 620 is also operative to output the PPDU based on the rate of the first field. Such as processor 620, may output the PPDU to transceiver 610, which is transmitted by transceiver 610.

Illustratively, when the communication device is configured to perform the steps or methods or functions performed by the receiving end described above, the transceiver 610 is configured to receive a PPDU; and a processor 620 for processing the PPDU.

The processor 620 is specifically configured to determine a first SFD sequence based on the preamble symbol and the SFD field; determining the rate of the first field corresponding to the first SFD sequence based on the corresponding relation between the SFD sequence and the rate of the first field; the first field is demodulated based on a rate of the first field.

In various implementations of the communication device shown in fig. 6, the transceiver may include a receiver to perform the functions (or operations) of receiving and a transmitter to perform the functions (or operations) of transmitting. And transceivers are used to communicate with other devices/means via transmission media.

Optionally, the communication device 60 may also include one or more memories 630 for storing program instructions and/or data, etc. Memory 630 is coupled to processor 620. The coupling in the embodiments of the present application is an indirect coupling or communication connection between devices, units, or modules, which may be in electrical, mechanical, or other forms for information interaction between the devices, units, or modules. Processor 620 may operate in conjunction with memory 630. Processor 620 may execute program instructions stored in memory 630. In the alternative, at least one of the one or more memories may be included in the processor. For example, the memory may be used to store a set of rates; or the correspondence between the SFD sequence and the rate of the PHR field, etc.

The specific connection medium between the transceiver 610, the processor 620, and the memory 630 is not limited in the embodiment of the present application. The embodiment of the present application is illustrated in fig. 6 by the memory 630, the processor 620, and the transceiver 610 being connected by a bus 640, which is illustrated in fig. 6 by a bold line, and the connection between other components is illustrated by way of illustration only and not by way of limitation. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one thick line is shown in fig. 6, but not only one bus or one type of bus.

In the embodiment of the present application, the processor may 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 discrete gate or transistor logic device, a discrete hardware component, or the like, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiment of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution, etc.

In an embodiment of the present application, the Memory may include, but is not limited to, nonvolatile Memory such as a hard disk (HARD DISK DRIVE, HDD) or Solid State Disk (SSD), random access Memory (Random Access Memory, RAM), erasable programmable Read-Only Memory (Erasable Programmable ROM, EPROM), read-Only Memory (ROM), or portable Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), etc. The memory is any storage medium that can be used to carry or store program code in the form of instructions or data structures and that can be read and/or written by a computer (e.g., a communication device, etc., as illustrated by the present application), but is not limited thereto. The memory in embodiments of the present application may also be circuitry or any other device capable of performing memory functions for storing program instructions and/or data.

The processor 620 is mainly used for processing communication protocols and communication data, controlling the whole communication device, executing software programs, and processing data of the software programs. The memory 630 is used mainly to store software programs and data. The transceiver 610 may include control circuitry for primarily converting baseband signals to radio frequency signals and processing radio frequency signals, and an antenna. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the communication device is powered on, the processor 620 may read the software program in the memory 630, interpret and execute instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor 620 performs baseband processing on the data to be transmitted and outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 620, and the processor 620 converts the baseband signal into data and processes the data.

In another implementation, the radio frequency circuitry and antenna may be provided separately from the processor performing the baseband processing, e.g., in a distributed scenario, the radio frequency circuitry and antenna may be in a remote arrangement from the communication device.

It will be appreciated that the communication device shown in the embodiment of the present application may also have more components than those shown in fig. 6, and the embodiment of the present application is not limited thereto. The methods performed by the processors and transceivers shown above are merely examples, and reference is made to the methods described above for specific steps performed by the processors and transceivers.

In another possible implementation, in the communications device shown in fig. 5, the processing unit 501 may be one or more logic circuits, and the transceiver unit 502 may be an input-output interface, which is also referred to as a communications interface, or an interface circuit, or an interface, or the like. Alternatively, the transceiver unit 502 may be a transmitting unit and a receiving unit, the transmitting unit may be an output interface, and the receiving unit may be an input interface, where the transmitting unit and the receiving unit are integrated into one unit, for example, the input/output interface. As shown in fig. 7, the communication apparatus shown in fig. 7 includes a logic circuit 701 and an interface 702. That is, the processing unit 501 may be implemented by the logic circuit 701, and the transceiver unit 502 may be implemented by the interface 702. The logic 701 may be a chip, a processing circuit, an integrated circuit, or a system on chip (SoC) chip, and the interface 702 may be a communication interface, an input/output interface, a pin, or the like. Fig. 7 exemplifies the communication device described above as a chip, which includes a logic circuit 701 and an interface 702.

It is understood that the chip shown in the embodiment of the present application may include a super bandwidth chip, and the step of transmitting the PPDU or the step of receiving the PPDU as shown above may be performed by the super bandwidth chip.

In the embodiment of the application, the logic circuit and the interface can be coupled with each other. The embodiment of the present application is not limited to the specific connection manner of the logic circuit and the interface. For ease of description, a narrowband chip will be described below as an example. But should not be construed as limiting the embodiments of the application. Illustratively, after the narrowband chip outputs the sense signal, the sense signal may be transmitted by the ultra-wideband chip. Illustratively, after the ultra-bandwidth chip receives the sense signal, the sense signal may be sent to the narrowband chip.

Illustratively, when the communications apparatus is configured to perform a method or function or step performed by the transmitting end described above, the logic 701 is configured to generate a PPDU; and an interface 702 for outputting the PPDU.

The logic 701 is configured to obtain indication information, and generate a PPDU based on the first indication information in a case where the indication information includes the first indication information.

The logic 701 is also illustratively operable to output the PPDU based on the rate of the first field.

Illustratively, when the communications device is configured to perform a method or function or step performed by the receiving end described above, the interface 702 is configured to input a PPDU; logic 701 for processing PPDUs.

The logic 701 is specifically configured to determine a first SFD sequence based on the preamble symbol and the SFD field; determining the rate of the first field corresponding to the first SFD sequence based on the corresponding relation between the SFD sequence and the rate of the first field; the first field is demodulated based on a rate of the first field.

Optionally, the chip shown in fig. 7 may further include a memory, which may be used to store a rate set, a correspondence between SFD sequences and PHR rates, and so on.

It may be understood that the communication device shown in the embodiment of the present application may implement the method provided in the embodiment of the present application in a hardware manner, or may implement the method provided in the embodiment of the present application in a software manner, which is not limited to this embodiment of the present application.

Reference may also be made to the above embodiments for a specific implementation of the embodiments shown in fig. 7, which are not described in detail herein.

The embodiment of the application also provides a wireless communication system, which comprises a transmitting end and a receiving end, wherein the transmitting end and the receiving end can be used for executing the method in any of the previous embodiments (such as fig. 4).

Furthermore, the present application provides a computer program for implementing the operations and/or processes performed by the transmitting end in the method provided by the present application.

The present application also provides a computer program for implementing the operations and/or processes performed by the receiving end in the method provided by the present application.

The present application also provides a computer readable storage medium having computer code stored therein, which when run on a computer causes the computer to perform the operations and/or processes performed by a transmitting end in the method provided by the present application.

The present application also provides a computer readable storage medium having computer code stored therein, which when run on a computer causes the computer to perform the operations and/or processes performed by a receiving end in the method provided by the present application.

The present application also provides a computer program product comprising computer code or a computer program which, when run on a computer, causes the operations and/or processes performed by the sender in the method provided by the present application to be performed.

The present application also provides a computer program product comprising computer code or a computer program which, when run on a computer, causes operations and/or processes performed by a receiving end in a method provided by the present application to be performed.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the technical effects of the scheme provided by the embodiment of the application.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a readable storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned readable storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An ultra-wideband based rate indication method, the method comprising:

Generating a physical layer protocol data unit, PPDU, the PPDU comprising a frame start separator, SFD, field and a first field, the SFD field determined based on a preamble symbol and a first SFD sequence, the first SFD sequence being for indicating a rate of the first field, a position of the first field in the PPDU being located after the SFD field;

And sending the PPDU.

2. The method of claim 1, wherein generating the PPDU comprises:

Acquiring indication information, wherein the indication information comprises first indication information, and the first indication information is used for indicating the rate of indicating the first field through the first SFD sequence;

And generating the PPDU based on the first indication information.

3. A method for indicating a rate based on an ultrabandwidth, the method comprising:

Receiving a PPDU, the PPDU comprising a frame start separator, SFD, field and a first field, the SFD field determined based on a preamble symbol and a first SFD sequence, the first SFD sequence being for indicating a rate of the first field, a position of the first field in the PPDU being located after the SFD field;

and processing the PPDU.

4. The method of claim 3, wherein the processing the PPDU comprises:

Determining the first SFD sequence based on the preamble symbol and the SFD field;

determining the rate of the first field corresponding to the first SFD sequence based on the corresponding relation between the SFD sequence and the rate of the first field;

Demodulating the first field based on a rate of the first field.

5. The method of any of claims 1-4, wherein the first SFD sequence is one of M SFD sequences, each of the M SFD sequences corresponds to one rate of the first field, and at least two different rates of M rates to which the M SFD sequences correspond, M being an integer greater than or equal to 2.

6. The method of claim 5, wherein the M rates are included in a set of rates, the set of rates being a predefined set.

7. The method of any of claims 1-6, wherein the first SFD sequence to indicate a rate of the first field comprises:

The first SFD sequence is used for indicating the value of the speed of the first field; or alternatively

8. The method of any one of claims 1-7, wherein the first SFD sequence has a length of L,

When l=16 and m=2, the first SFD sequence is any one of the following: [ -1, -1, -1, -1, -1, -1], [ -1, -1, -1, -1, -1, -1]; or alternatively

When l=16 and m=4, the first SFD sequence is any one of ：[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,-1]、[-1,-1,1,1,-1,-1,-1,1,1,1,1,1,1,-1,1,-1]、[-1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,1,1,-1]、[-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1,-1,1]; or

When l=16 and m=8, the first SFD sequence is any one of the following ：[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,-1]、[-1,1,-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1]、[-1,1,-1,-1,-1,1,-1,-1,-1,-1,1,1,1,1,-1,1]、[-1,1,-1,1,-1,-1,1,1,1,1,1,-1,-1,1,1,-1]、[-1,-1,1,1,1,-1,1,1,1,-1,1,-1,-1,1,-1,1]、[-1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,1,1,-1]、[-1,1,-1,1,-1,-1,-1,-1,1,-1,-1,1,1,-1,1,1]、[-1,1,-1,1,-1,1,1,-1,-1,1,1,-1,-1,-1,-1,1].

9. The method of any one of claims 1-7, wherein the first SFD sequence has a length of L,

When l=32 and m=2, the first SFD sequence is any one of ：[-1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,-1 1,-1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1,-1,1,1,-1,-1]、[-1,-1,-1,1,-1,1,-1,-1,-1,1,1,1,1,-1,1,1,-1,-1,1,1,-1,1,1,1,1,-1,1,-1,-1,1,-1,1]; or

When l=32 and m=4, the first SFD sequence is any one of ：[-1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,-1 1,-1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1,-1,1,1,-1,-1]、[-1,1,1,-1,-1,1,-1,-1,1,1,-1,1,-1,1,-1,-1,-1,-1,1,1,1,1,1,1,1,-1,-1,1,1,1,-1,-1]、[-1,1,-1,-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1,-1,1,-1,-1,1,1,1,-1,1,1,1,1,-1,1,1,1,-1]、[-1,-1,1,1,1,-1,-1,1,-1,1,-1,-1,1,-1,-1,-1,1,1,1,-1,1,-1,-1,1,1,-1,1,1,1,1,1,-1]; or

When l=32 and m=8, the first SFD sequence is any one of the following ：[-1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,-1 1,-1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1,-1,1,1,-1,-1]、[-1,1,-1,-1,-1,-1,1,1,-1,-1,-1,1,1,1,1,1,1,1,-1,1,-1,1,-1,1,1,-1,1,1,-1,-1,1,-1]、[-1,-1,-1,-1,1,1,-1,1,1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,-1,-1,1,-1,1,-1,1,1,1,1,1]、[-1,-1,1,1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,1,-1,1,-1,-1,-1,-1,1,-1,1,1,1,-1,1,1,1,-1]、[-1,1,-1,-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1,-1,1,-1,-1,1,1,1,-1,1,1,1,1,-1,1,1,1,-1]、[-1,-1,1,1,1,-1,-1,1,-1,1,-1,-1,1,-1,-1,-1,1,1,1,-1,1,-1,-1,1,1,-1,1,1,1,1,1,-1]、[-1,-1,1,-1,-1,1,-1,1,1,1,1,1,1,-1,-1,-1,1,1,1,-1,1,-1,1,-1,1,1,-1,-1,1,1,-1,-1]、[-1,-1,-1,-1,1,1,1,-1,-1,1,1,1,1,1,-1,1,-1,1,1,-1,1,1,-1,1,-1,-1,-1,1,-1,-1,1,1].

10. The method of any one of claims 1-7, wherein the first SFD sequence has a length of L,

When l=16 and m=2, the first SFD sequence is any one of the following: [ -1, -1, -1, -1, -1, -1], [1, -a sequence of 1, -1, -1, -1,1]; or alternatively

When l=16 and m=4, the first SFD sequence is any one of ：[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,-1]、[-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1,1,-1]、[1,1,1,1,1,-1,-1,1,1,-1,1,-1,1,1,-1,1]、[1,1,1,1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1]; or

When l=16 and m=8, the first SFD sequence is any one of the following ：[-1,-1,-1,-1,-1,1,1,-1,-1,1,-1,1,-1,-1,1,-1]、[-1,-1,1,1,-1,-1,-1,1,1,1,1,1,1,-1,1,-1]、[-1,-1,1,-1,-1,1,1,1,1,-1,1,-1,1,1,1,-1]、[-1,-1,-1,-1,-1,1,-1,1,1,1,-1,-1,1,1,-1,1]、[1,1,1,1,1,-1,-1,1,1,-1,1,-1,1,1,-1,1]、[1,1,-1,-1,1,1,1,-1,-1,-1,-1,-1,-1,1,-1,1]、[1,1,-1,1,1,-1,-1,-1,-1,1,-1,1,-1,-1,-1,1]、[1,1,1,1,1,-1,1,-1,-1,-1,1,1,-1,-1,1,-1].

11. The method of any one of claims 1-7, wherein when the first SFD sequence has a length of L, l=32, m=2, the first SFD sequence is any one of ：[-1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,-1,1,-1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1,-1,1,1,-1,-1]、[1,1,1,1,1,1,1,-1,1,1,-1,1,1,1,1,-1,1,-1,1,1,1,-1,-1,1,1,1,-1,1,-1,-1,1,1]; or

When l=32 and m=4, the first SFD sequence is any one of ：[-1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,-1 1,-1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1,-1,1,1,-1,-1]、[-1,-1,-1,1,-1,1,-1,-1,-1,1,1,1,1,-1,1,1,-1,-1,1,1,-1,1,1,1,1,-1,1,-1,-1,1,-1,1]、[1,1,1,1,1,1,1,-1,1,1,-1,1,1-1,1,-1,1,-1,1,1,1,-1,-1,1,1,1,-1,1,-1,-1,1,1]、[1,1,1,-1,1,-1,1,1,1,-1,-1,-1,-1,1,-1,-1,1,1,-1,-1,1,-1,-1,-1,-1,1,-1,1,1,-1,1,-1]; or

When l=32 and m=8, the first SFD sequence is any one of the following ：[-1,-1,-1,-1,-1,-1,-1,1,-1,-1,1,-1,-1 1,-1,1,-1,1,-1,-1,-1,1,1,-1,-1,-1,1,-1,1,1,-1,-1]、[-1,1,1,-1,-1,1,-1,-1,1,1,-1,1,-1,1,-1,-1,-1,-1,1,1,1,1,1,1,1,-1,-1,1,1,1,-1,-1]、[-1,1,-1,-1,-1,-1,-1,1,1,1,1,-1,-1,1,-1,-1,1,-1,-1,1,1,1,-1,1,1,1,1,-1,1,1,1,-1]、[-1,-1,1,1,1,-1,-1,1,-1,1,-1,-1,1,-1,-1,-1,1,1,1,-1,1,-1,-1,1,1,-1,1,1,1,1,1,-1]、[1,1,1,1,1,1,1,-1,1,1,-1,1,1-1,1,-1,1,-1,1,1,1,-1,-1,1,1,1,-1,1,-1,-1,1,1]、[1,-1,-1,1,1,-1,1,1,-1,-1,1,-1,1,-1,1,1,1,1,-1,-1,-1,-1,-1,-1,-1,1,1,-1,-1,-1,1,1]、[1,-1,1,1,1,1,1,-1,-1,-1,-1,1,1,-1,1,1,-1,1,1,-1,-1,-1,1,-1,-1,-1,-1,1,-1,-1,-1,1]、[1,1,-1,-1,-1,1,1,-1,1,-1,1,1,-1,1,1,1,-1,-1,-1,1,-1,1,1,-1,-1,1,-1,-1,-1,-1,-1,1].

12. The method of any of claims 1-11, wherein the first SFD sequence is further to indicate a type of the PPDU, the type of PPDU comprising at least one of: the PPDU is used for sensing or the PPDU is used for ranging.

13. The method of any of claims 1-12, wherein the first field comprises a physical layer header PHR field.

14. The method of any of claims 1-13, wherein the PPDU further comprises a frame synchronization field for carrying the preamble symbol.

15. A communication device comprising means for performing the method of any of claims 1-14.

16. A communication device comprising a processor and a memory;

the memory is used for storing instructions;

the processor is configured to execute the instructions to cause the method of any one of claims 1-14 to be performed.

17. A communication device comprising logic circuitry and an interface, the logic circuitry and interface coupled;

the interface being for inputting and/or outputting code instructions and the logic circuitry being for executing the code instructions to cause the method of any of claims 1-14 to be performed.

18. A computer readable storage medium for storing a computer program which, when executed, is adapted to carry out the method of any one of claims 1-14.

19. A computer program, characterized in that the method according to any of claims 1-14 is performed when the computer program is executed.

20. A communication system comprising a transmitting end for performing the method of any of claims 1,2, 5-14 and a receiving end for performing the method of any of claims 3-14.