Method and apparatus for transmitting a wake-up packet in a communication system

Abstract

The application provides a method and device for transmitting a wake-up packet in a communication system, the communication system comprising a sending device and a receiving device, the receiving device comprising a wake-up receiver and a main transceiver, the method comprising: the sending device transmitting a first wake-up packet (WUP) to the wake-up receiver at a first data rate; the sending device determining a second data rate; and the sending device transmitting a second WUP to the wake-up receiver at the second data rate. The sending device can determine a suitable data rate for transmitting a wake-up packet according to specific transmission conditions in a communication process, thereby improving the transmission efficiency of the wake-up packet.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communications, and more specifically, to a method and apparatus for transmitting wake-up packets in a communication system. Background Technology

[0002] Devices deployed in communication systems typically require long lifespans, necessitating extremely low power consumption. An intuitive way to reduce power consumption is to avoid keeping the device's transmit and receive links constantly active. For the transmit link, the device can autonomously control its activity, waking up only when data needs to be transmitted. For the receive link, the common approach is for the device to remain in a sleep state, waking up only when data needs to be received. Since the device cannot determine when data will be received, the sleep-wake-up design must simultaneously consider both sleep efficiency and data transmission latency.

[0003] One sleep-wake method involves introducing a low-power wake-up radio (WUR). The WUR can continuously listen for data at extremely low power and, upon detecting a wake-up packet, wakes the main link to resume normal data exchange. Improving the transmission efficiency of the wake-up packet is a crucial issue that needs to be addressed in this sleep-wake method. Summary of the Invention

[0004] This application provides a method and apparatus for transmitting wake-up packets in a communication system, which can improve the transmission efficiency of wake-up packets in the communication system.

[0005] In a first aspect, a method for transmitting a wake-up packet in a communication system is provided. The communication system includes a transmitting device and a receiving device. The receiving device includes a wake-up receiver and a master transceiver. The method includes: the transmitting device sending a first wake-up packet (WUP) to the wake-up receiver at a first data rate; the transmitting device determining a second data rate; and the transmitting device sending a second WUP to the wake-up receiver at the second data rate.

[0006] Therefore, according to the method for transmitting wake-up packets in the communication system of this application, the sending device can send wake-up packets to the receiving device at different data rates. Thus, the sending device can determine the appropriate data rate for sending wake-up packets based on the specific transmission conditions during communication, thereby improving the transmission efficiency of wake-up packets.

[0007] In conjunction with the first aspect, in a first possible implementation of the first aspect, the transmitting device sends a first wake-up packet to the wake-up receiver at a first data rate, including: the transmitting device sending the first WUP to the wake-up receiver at a first symbol rate; wherein, the transmitting device determines a second data rate, and the transmitting device sends a second WUP to the wake-up receiver at the second data rate, including: the transmitting device determining a second symbol rate; and the transmitting device sending the second WUP to the wake-up receiver at the second symbol rate.

[0008] In conjunction with the first aspect, or the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the transmitting device sends a first wake-up packet (WUP) to the wake-up receiver at a first data rate, including: the transmitting device sending the first WUP to the wake-up receiver using a first modulation and coding scheme; wherein, the transmitting device determines a second data rate, and the transmitting device sends a second WUP to the wake-up receiver at the second data rate, including: the transmitting device determining a second modulation and coding scheme; the transmitting device sending the second WUP to the wake-up receiver using the second modulation and coding scheme.

[0009] It is understood that the different data rates used by the transmitting device in the two transmissions of the wake-up packet in this application may be manifested in the following ways: the symbol rate used in the two transmissions of the wake-up packet is different, and / or the modulation and coding scheme used in the two transmissions of the wake-up packet is different.

[0010] In conjunction with the first aspect, or any of the first or second possible implementations of the first aspect, in a third possible implementation of the first aspect, the transmitting device determines the second data rate by: the transmitting device determining the second data rate based on the data rate used when sending data to the master transceiver.

[0011] In conjunction with the first aspect, or any of the first or second possible implementations of the first aspect, in the fourth possible implementation of the first aspect, the transmitting device determines the second data rate by: the transmitting device determining the second data rate based on the operating frequency band of the master transceiver and / or the operating frequency band of the wake-up receiver.

[0012] In conjunction with the first aspect, or any of the first or second possible implementations of the first aspect, in the fifth possible implementation of the first aspect, the transmitting device determines the second data rate by: the transmitting device determining the symbol length corresponding to the second data rate based on multipath delay spread.

[0013] Optionally, the multipath delay spread can be a short-range (indoor environment) multipath delay spread, or a long-range (outdoor environment) multipath delay spread, or a multipath delay spread under the current communication environment.

[0014] In conjunction with the first aspect, or the first or second possible implementation of the first aspect, in the sixth possible implementation of the first aspect, the transmitting device determines the second data rate by: the transmitting device receiving feedback information sent by the receiving device through the master transceiver; and the transmitting device determining the second data rate based on the feedback information.

[0015] Optionally, the feedback information sent by the receiving device to the sending device via the master transceiver includes information indicating the data rate desired by the receiving device.

[0016] In conjunction with the sixth possible implementation of the first aspect, in the seventh possible implementation of the first aspect, the feedback information includes first information for indicating the signal-to-noise ratio at the operating frequency of the master transceiver and / or the wake-up receiver; wherein, the transmitting device determines the second data rate based on the feedback information, including: the transmitting device determines the second data rate based on the first information and the correspondence between the signal-to-noise ratio and the data rate.

[0017] Therefore, the feedback mechanism in 802.11 can be reused to simplify the implementation of the receiving device.

[0018] In conjunction with the sixth possible implementation of the first aspect, in the eighth possible implementation of the first aspect, the feedback information includes second information for indicating the power when the first WUP reaches the wake-up receiver, wherein the transmitting device determines the second data rate based on the feedback information, including: the transmitting device determines the second data rate based on the second information and a preset power threshold;

[0019] Alternatively, the feedback information may include third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiver, wherein the transmitting device determines the second data rate based on the feedback information, including: the transmitting device determining the second data rate based on the third information and a preset signal-to-noise ratio threshold; or,

[0020] The feedback information includes fourth information for indicating the packet error rate of the first WUP at the wake-up receiver, wherein the transmitting device determines the second data rate based on the feedback information, including: the transmitting device determines the second data rate based on the fourth information and a preset packet error rate threshold.

[0021] In conjunction with any of the sixth to eighth possible implementations of the first aspect, in the ninth possible implementation of the first aspect, the sending device receiving feedback information sent by the receiving device through the master transceiver includes: the sending device receiving a Media Access Control (MAC) frame sent by the receiving device through the master transceiver, the MAC frame carrying the feedback information.

[0022] Optionally, the MAC frame includes an Information Element (IE), which contains an information field that carries the feedback information.

[0023] In conjunction with the ninth possible implementation of the first aspect, in the tenth possible implementation of the first aspect, the transmitting device receiving a Media Access Control (MAC) frame transmitted by the receiving device through the master transceiver includes: the transmitting device receiving a Quality of Service (QoS) data frame transmitted by the receiving device through the master transceiver, the QoS data frame including a high throughput control field carrying the feedback information; or, the transmitting device receiving a QoS blank frame transmitted by the receiving device through the master transceiver, the QoS blank frame including an efficient aggregation control field carrying the feedback information; or, the transmitting device receiving a beamforming report transmitted by the receiving device through the master transceiver, the beamforming report including a feedback field carrying the feedback information.

[0024] In conjunction with the first aspect, or any of the first to tenth possible implementations of the first aspect, in the eleventh possible implementation of the first aspect, the transmitting device transmits a second WUP to the wake-up receiver at a second data rate, comprising: the transmitting device modulating the information bits in the second WUP into a plurality of modulation symbols according to the second data rate, the plurality of modulation symbols including a first modulation symbol with symbol energy of 0 and a second modulation symbol with symbol energy of non-zero; and the transmitting device transmitting the plurality of modulation symbols to the wake-up receiver.

[0025] In conjunction with the eleventh possible implementation of the first aspect, in the twelfth possible implementation of the first aspect, the transmitting device sends the plurality of modulation symbols to the wake-up receiver, including: the transmitting device sending the plurality of modulation symbols to the wake-up receiver by sending one placeholder symbol to the wake-up receiver for every first preset number of modulation symbols sent to the wake-up receiver, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0; or, the transmitting device sending the plurality of modulation symbols to the wake-up receiver by sending one placeholder symbol to the wake-up receiver for every second preset number of the first modulation symbols sent to the wake-up receiver, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0026] This avoids situations where other receiving devices preempt the channel due to excessively long channel idle time, thus affecting the transmission of wake-up packets and improving the transmission efficiency of wake-up packets.

[0027] In conjunction with the first aspect, or any of the first to twelfth possible implementations of the first aspect, in the thirteenth possible implementation of the first aspect, the second WUP includes a signaling field and a data field arranged in the transmission timing sequence, the signaling field carrying indication information for indicating the second data rate.

[0028] In conjunction with the thirteenth possible implementation of the first aspect, in the fourteenth possible implementation of the first aspect, the second WUP further includes a redundant field, the transmission time of which is after the transmission time of the signaling field and before the transmission time of the data field.

[0029] Therefore, the receiving device can adjust its data rate during the time the sending device is sending redundant fields, so as to successfully receive and parse the data fields sent by the sending device.

[0030] In conjunction with the first aspect, or in the first to twelfth possible implementations of the first aspect, in the fifteenth possible implementation of the first aspect, the second WUP includes a preamble field and a data field according to the transmission timing, so that the receiving device can determine the second data rate according to the preamble mode corresponding to the preamble field and a preset correspondence, wherein the preset correspondence includes the correspondence between the preamble mode and the data rate.

[0031] In conjunction with the first aspect, or the first to fifteenth possible implementations of the first aspect, in the sixteenth possible implementation of the first aspect, the second WUP includes a MAC header field, the MAC header field includes an identification information field, the identification information field is used to carry the identification information of the receiving device, and the method further includes: the transmitting device determines the number of information bits included in the identification information field according to the second data rate, wherein the number of information bits included in the identification information field is positively correlated with the magnitude of the second data rate.

[0032] This avoids the transmission overhead caused by including too many information bits in the identification information field.

[0033] Optionally, the MAC header field includes a field indicating the number of information bits included in the identification information field. This allows the receiving device to determine the number of information bits in the identification information field based on the information carried by this field.

[0034] In a second aspect, a method for transmitting wake-up packets in a communication system is provided. The communication system includes a transmitting device and a receiving device. The receiving device includes a wake-up receiver and a master transceiver. The method includes: the receiving device receiving a first wake-up packet (WUP) transmitted by the transmitting device at a first data rate via the wake-up receiver; the receiving device receiving a second WUP transmitted by the transmitting device at a second data rate via the wake-up receiver; the receiving device determining the second data rate; and the receiving device parsing the second WUP according to the second data rate.

[0035] Therefore, according to the method for transmitting wake-up packets in the communication system of this application, the receiving device receives wake-up packets sent by the sending device at different data transmission rates, and the sending device can determine the appropriate data rate for sending wake-up packets according to the specific transmission conditions during the communication process, thereby improving the transmission efficiency of wake-up packets.

[0036] In conjunction with the second aspect, in a first possible implementation of the second aspect, the receiving device receiving a first wake-up WUP transmitted by the sending device at a first data rate via the wake-up receiver includes: the receiving device receiving the first WUP transmitted by the sending device at a first symbol rate via the wake-up receiver; the receiving device receiving a second WUP transmitted by the sending device at a second data rate via the wake-up receiver includes: the receiving device receiving the second WUP transmitted by the sending device at the second symbol rate via the wake-up receiver; the receiving device determining the second data rate includes: the receiving device determining the second symbol rate; and the receiving device parsing the second WUP according to the second data rate includes: the receiving device parsing the second WUP according to the second symbol rate.

[0037] In conjunction with the second aspect, or the first possible implementation of the second aspect, in the second possible implementation of the second aspect, the receiving device receiving a first wake-up WUP transmitted by the transmitting device at a first data rate via the wake-up receiver includes: the receiving device receiving the first WUP transmitted by the transmitting device using a first modulation and coding scheme via the wake-up receiver; the receiving device receiving a second WUP transmitted by the transmitting device at a second data rate via the wake-up receiver includes: the receiving device receiving the second WUP transmitted by the transmitting device using the second modulation and coding scheme via the wake-up receiver; the receiving device determining the second data rate includes: the receiving device determining the second modulation and coding scheme; and the receiving device parsing the second WUP according to the second data rate includes: the receiving device parsing the second WUP according to the second modulation and coding scheme.

[0038] In conjunction with the second aspect, or any of the first or second possible implementations of the second aspect, in a third possible implementation of the second aspect, the method further includes: the receiving device sending feedback information to the sending device through the master transceiver, so that the sending device can determine the second data rate based on the feedback information.

[0039] In conjunction with the third possible implementation of the second aspect, in the fourth possible implementation of the second aspect, the feedback information includes first information for indicating the signal-to-noise ratio of the operating frequency of the master transceiver and / or the wake-up receiver, so that the transmitting device can determine the second data rate based on the first information and the correspondence between the signal-to-noise ratio and the data rate.

[0040] In conjunction with the third possible implementation of the second aspect, in the fifth possible implementation of the second aspect, the feedback information includes second information indicating the power of the first WUP when it arrives at the wake-up receiver, so that the transmitting device can determine the second data rate based on the second information and a preset power threshold; or, the feedback information includes third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiver, so that the transmitting device can determine the second data rate based on the third information and a preset signal-to-noise ratio threshold; or, the feedback information includes fourth information indicating the packet error rate of the first WUP at the wake-up receiver, so that the transmitting device can determine the second data rate based on the fourth information and a preset packet error rate threshold.

[0041] In conjunction with any of the third to fifth possible implementations of the second aspect, in the sixth possible implementation of the second aspect, the receiving device sends feedback information to the sending device through the master transceiver, including: the receiving device sends a Media Access Control (MAC) frame to the sending device through the master transceiver, the MAC frame carrying the feedback information.

[0042] In conjunction with the sixth possible implementation of the second aspect, in the seventh possible implementation of the second aspect, the receiving device sends a Medium Access Control (MAC) frame to the sending device through the master transceiver, including: the receiving device sending a Quality of Service (QoS) data frame to the sending device through the master transceiver, the QoS data frame including a high throughput control field carrying the feedback information; or, the receiving device sending a QoS blank frame to the sending device through the master transceiver, the QoS blank frame including an efficient aggregation control field carrying the feedback information; or, the receiving device sending a beamforming report to the sending device through the master transceiver, the beamforming report including a feedback field carrying the feedback information.

[0043] In conjunction with the second aspect, or any of the first to seventh possible implementations of the second aspect, in the eighth possible implementation of the second aspect, the receiving device receives the second WUP transmitted by the transmitting device at the second data rate through the wake-up receiver, including: the receiving device receiving a plurality of modulation symbols transmitted by the transmitting device through the wake-up receiver, wherein the plurality of modulation symbols are obtained by the transmitting device modulating the information bits in the second WUP according to the second data rate, and the plurality of modulation symbols include a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of not 0.

[0044] In conjunction with the eighth possible implementation of the second aspect, in the ninth possible implementation of the second aspect, the plurality of modulation symbols are transmitted by the transmitting device by sending a placeholder symbol to the wake-up receiver for every first preset number of modulation symbols transmitted to the wake-up receiver, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0; wherein the receiving device receives the plurality of modulation symbols transmitted by the transmitting device through the wake-up receiver, including: the receiving device receives the plurality of modulation symbols through the wake-up receiver by ignoring one placeholder symbol for every first preset number of modulation symbols received.

[0045] In conjunction with the eighth possible implementation of the second aspect, in the ninth possible implementation of the second aspect, the plurality of modulation symbols are sent by the transmitting end device in such a way that for every second preset number of the second modulation symbols sent to the wake-up receiver, a placeholder symbol is sent to the wake-up receiver, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0046] The receiving device receives multiple modulation symbols sent by the transmitting device through the wake-up receiver, including: the receiving device receives the multiple modulation symbols by ignoring one placeholder symbol for each second preset number of the second modulation symbols received.

[0047] In conjunction with the second aspect, and any of the first to ninth possible implementations of the second aspect, in the tenth possible implementation of the second aspect, the second WUP includes a signaling field and a data field arranged in the transmission sequence, the signaling field carrying indication information for indicating the second data rate; wherein, the receiving device determines the second data rate by: the receiving device determining the second data rate based on the indication information.

[0048] In conjunction with the tenth possible implementation of the second aspect, in the eleventh possible implementation of the second aspect, the second WUP further includes a redundant field, the transmission time of which is after the transmission time of the signaling field and before the transmission time of the data field.

[0049] In conjunction with the second aspect, or any of the first to ninth possible implementations of the second aspect, in the twelfth possible implementation of the second aspect, the second WUP includes a preamble field and a data field according to the transmission timing; wherein, the receiving device determines the second data rate by: the receiving device determining the second data rate according to a preamble mode corresponding to the preamble field and a preset correspondence, wherein the preset correspondence includes a correspondence between the preamble mode and the data rate.

[0050] In conjunction with the second aspect, or any of the first to twelfth possible implementations of the second aspect, in the thirteenth possible implementation of the second aspect, the second WUP includes a MAC header field, the MAC header field includes an identification field, the identification information field is used to carry the identification information of the receiving device, and the number of information bits included in the identification information field is positively correlated with the magnitude of the second data rate.

[0051] Thirdly, a method for transmitting wake-up packets in a communication system is provided. The communication system includes a transmitting device and a receiving device. The receiving device includes a wake-up receiver and a master transceiver. The method includes: the transmitting device generating M wake-up packets (WUP); the transmitting device sending the i-th WUP to the wake-up receiver of the i-th receiving device among the M receiving devices, wherein the transmission resources occupied by the transmitting device when sending WUP to the wake-up receivers of any two receiving devices have the same time but different frequencies, i = 1, 2, ..., M, where M is a positive integer greater than 1.

[0052] Therefore, in the method for transmitting wake-up packets in a communication system according to embodiments of the present invention, the sending device simultaneously sends wake-up packets to multiple receiving devices, which can improve the transmission efficiency of wake-up packets.

[0053] In conjunction with the third aspect, in the first possible implementation of the third aspect, the method further includes: the transmitting device generating multiple symbols corresponding to the information bits in the i-th WUP, the multiple symbols including a first symbol with non-zero symbol energy and a second symbol with zero symbol energy, wherein the method for generating the first symbol is: determining the i-th frequency domain filling sequence; filling the i-th frequency domain filling sequence onto multiple subcarriers at the operating frequency point of the wake-up receiver of the i-th receiving device to obtain the i-th frequency domain signal; and performing an inverse Fourier transform (IFFT) on the i-th frequency domain signal to obtain the symbol carrying information bit 1.

[0054] In conjunction with the first possible implementation of the third aspect, in the second possible implementation of the third aspect, determining the i-th frequency domain filling sequence includes: rotating the pre-filled frequency domain sequence according to the i-th rotation factor among M rotation factors to obtain the i-th frequency domain filling sequence, wherein at least two of the M rotation factors are different.

[0055] In conjunction with the first possible implementation of the third aspect, in the third possible implementation of the third aspect, determining the i-th frequency domain filling sequence includes: generating a full bandwidth sequence; and determining the i-th filling sequence based on the full bandwidth sequence.

[0056] In conjunction with the first possible implementation of the third aspect, in the fourth possible implementation of the third aspect, the number of 0s between two adjacent non-zero values ​​in the i-th frequency domain filling sequence is a preset number.

[0057] In conjunction with the first possible implementation of the third aspect, in the fifth possible implementation of the third aspect, determining the i-th frequency domain filling sequence includes: generating the i-th time domain filling sequence, wherein the values ​​in the i-th time domain filling sequence have the same amplitude; and performing a Fourier transform (FFT) on the i-th time domain filling sequence to obtain the i-th frequency domain filling sequence.

[0058] Fourthly, a transmitting device is provided for executing the method in the first aspect or any possible implementation thereof. Specifically, the transmitting device includes a functional module for executing the method in the first aspect or any possible implementation thereof.

[0059] Fifthly, a receiving device is provided for executing the method in the second aspect or any possible implementation thereof. Specifically, the transmitting device includes a functional module for executing the method in the second aspect or any possible implementation thereof.

[0060] Sixthly, a transmitting device is provided for executing the method in the third aspect or any possible implementation thereof. Specifically, the transmitting device includes a functional module for executing the method in the third aspect or any possible implementation thereof.

[0061] In a seventh aspect, a transmitting device is provided, including a processor, a memory, and a transceiver. The processor, the memory, and the transceiver are connected via a bus system. The memory is used to store instructions, and the processor is used to call the instructions stored in the memory to control the transceiver to receive or send information, causing the transmitting device to execute the method in the first aspect or any possible implementation thereof.

[0062] Eighthly, a receiving device is provided, including a processor, a memory, a wake-up receiver, and a master transceiver. The processor, the memory, the wake-up receiver, and the master transceiver are connected via a bus system. The memory is used to store instructions. The processor is used to call the instructions stored in the memory to control the wake-up receiver to receive information and to control the master transceiver to receive or send information, so that the receiving device performs the methods in the second aspect or any possible implementation thereof.

[0063] A ninth aspect provides a transmitting device including a processor, a memory, and a transceiver, the processor, the memory, and the transceiver being connected via a bus system, the memory being used to store instructions, and the processor being used to call the instructions stored in the memory to control the transceiver to receive or transmit information, causing the transmitting device to perform the methods in the third aspect or any possible implementation thereof.

[0064] In a tenth aspect, a computer-readable medium is provided for storing a computer program including instructions for performing the methods of the first aspect or any possible implementation thereof.

[0065] Eleventhly, a computer-readable medium is provided for storing a computer program including instructions for performing the methods in the second aspect or any possible implementation thereof.

[0066] In a twelfth aspect, a computer-readable medium is provided for storing a computer program including instructions for performing the methods in the third aspect or any possible implementation thereof. Attached Figure Description

[0067] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0068] Figure 1 This is a schematic diagram illustrating an application scenario of an embodiment of the present invention;

[0069] Figure 2 This is a schematic diagram of a possible cooperative working mode between the wake-up receiver and the main transceiver according to an embodiment of the present invention;

[0070] Figure 3 This is a schematic diagram of the structure of the wake-up packet according to an embodiment of the present invention;

[0071] Figure 4 This is a schematic flowchart of a method for transmitting a wake-up packet in a communication system according to an embodiment of the present invention;

[0072] Figure 5 This is a schematic diagram of two different symbol lengths according to an embodiment of the present invention;

[0073] Figure 6 This is another schematic flowchart of a method for transmitting a wake-up packet in a communication system according to an embodiment of the present invention;

[0074] Figure 7 This is a schematic diagram of the structure of a QoS data frame according to an embodiment of the present invention;

[0075] Figure 8 This is a schematic diagram of the structure of the high-efficiency aggregation control field according to an embodiment of the present invention;

[0076] Figure 9 This is a schematic diagram of the structure of a beamforming report according to an embodiment of the present invention;

[0077] Figure 10 This is a schematic diagram of the structure of an information element according to an embodiment of the present invention;

[0078] Figure 11 This is a schematic diagram of the structure of an M-BA frame according to an embodiment of the present invention;

[0079] Figure 12 This is a schematic diagram of the structure of the trigger frame according to an embodiment of the present invention;

[0080] Figure 13 This is a schematic diagram of the structure of a wake-up package according to another embodiment of the present invention;

[0081] Figure 14 This is a schematic diagram of the structure of a wake-up packet according to another embodiment of the present invention;

[0082] Figure 15 This is a schematic diagram of a method for distinguishing receiving devices according to an embodiment of the present invention;

[0083] Figure 16 This is a schematic diagram of a method for a transmitting device to simultaneously send wake-up packets to multiple receiving devices according to an embodiment of the present invention;

[0084] Figure 17 This is a schematic block diagram of a transmitting device according to an embodiment of the present invention;

[0085] Figure 18 This is a schematic block diagram of a receiving end device according to an embodiment of the present invention;

[0086] Figure 19 This is a schematic block diagram of a transmitting end device according to another embodiment of the present invention;

[0087] Figure 20 This is a schematic block diagram of a receiving end device according to another embodiment of the present invention. Detailed Implementation

[0088] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0089] Figure 1 This is a schematic diagram illustrating an application scenario of an embodiment of the present invention. Figure 1 The wireless local area network (WLAN) shown includes transmitting devices (e.g., Figure 1 The Access Point (AP) and receiving device shown are as follows: Figure 1The image shows a Station (STA). The AP is responsible for bidirectional communication with multiple STAs, for example... Figure 1 The AP to STA shown in the figure (e.g.) Figure 1 STA1 and STA2 in the network send downlink data, or the AP receives data from STAs (e.g., STA1 and STA2 in the network). Figure 1 The uplink data in STA3. It should be understood that... Figure 1 The number of APs and STAs shown is only illustrative; a WLAN can include any number of APs and STAs.

[0090] Figure 2 This is a schematic diagram illustrating a possible cooperative working mode of the wake-up receiver and the main transceiver according to an embodiment of the present invention. Figure 2 As shown, the receiving device includes a master transceiver 2 and a wake-up receiver, while the transmitting device includes a master transceiver 1. To achieve low power consumption, the wake-up receiver has a simple circuit design, consisting only of energy detection and radio frequency (RF) components. When the master transceiver 2 of the receiving device enters deep sleep mode, the low-power wake-up receiver wakes up and begins operation. If the transmitting device needs to communicate with the receiving device, it first sends a wake-up packet (WUP) to the wake-up receiver. Upon correctly receiving the WUP, the wake-up receiver wakes up the master transceiver 2 and then enters sleep mode. The transmitting device then communicates with the master transceiver 2 through master transceiver 1. After master transceiver 2 completes communication with the transmitting device, it enters sleep mode, and the wake-up receiver wakes up and begins listening for a WUP, waking up the master transceiver 2 upon receiving it.

[0091] It should be understood that the master transceiver of a receiving device can only be woken up by the wake-up receiver corresponding to that receiving device. Unless otherwise specified in this document, the master transceiver and wake-up receiver refer to the master transceiver and wake-up receiver of the same receiving device. When the receiving device is a STA, the corresponding sending device is an AP; when the receiving device is an AP, the corresponding receiving device is not a STA.

[0092] It should also be understood that the WUP mentioned in the embodiments of the present invention can also be referred to as a wake-up frame. Figure 3This illustration shows a possible structure of a WUP according to an embodiment of the present invention, which includes a Legacy 802.11 Preamble and a WUP Payload. The WUP Payload includes a Wake Up Preamble, a Medium Access Control Header (MAC Header), a Frame Body, and a Frame Check Sequence (FCS). The WUP Payload can also be a Data Part.

[0093] Among them, Legacy 802.11 Preamble is used to protect the subsequent parts of WUP from interference by traditional 802.11 devices. Wake Up Preamble is used by the receiving device to identify the WUP signal. The MAC Header can carry information such as the addresses of the receiving and sending devices. The Frame Body is used to carry some other information. The FCS is used to ensure that the data received by the receiving device is the same as the data sent by the sending device.

[0094] The following describes a method for transmitting a wake-up packet in a communication system according to an embodiment of the present invention, with reference to specific embodiments. It should be noted that in the following embodiments, the data rate refers to the amount of information (number of bits) transmitted on the channel per unit time, the symbol rate refers to the number of symbols transmitted on the channel per unit time, and the sending end device sending a wake-up packet to the wake-up receiver of the receiving end device can also be described as the sending end device sending a wake-up packet to the receiving end device.

[0095] Figure 4 This is a schematic flowchart illustrating a method for transmitting a wake-up packet in a communication system according to an embodiment of the present invention. The communication system includes a transmitting end device and a receiving end device, and the receiving end device includes a wake-up receiver and a master transceiver. Figure 4 As shown, method 100 includes:

[0096] S110, the transmitting device sends a first wake-up packet WUP to the wake-up receiver at the first data rate;

[0097] S120, The transmitting device determines the second data rate;

[0098] S130, the transmitting device sends a second WUP to the wake-up receiver using the second data rate.

[0099] Alternatively, as an example, in S110, one possible implementation of the transmitting device sending the first WUP to the wake-up receiver using the first data rate is: the transmitting device sends the first WUP to the wake-up receiver using the first symbol rate. Correspondingly, in S120, the transmitting device determines the second symbol rate, and in S130, the transmitting device sends the second WUP to the wake-up receiver using the second symbol rate.

[0100] In other words, one specific implementation of sending WUP to the wake-up receiver of the receiving device using a variable data rate is as follows: the sending device sends WUP to the wake-up receiver of the receiving device using a variable symbol rate.

[0101] It is understandable that a variable symbol rate can be specifically manifested as a variable symbol length, for example, t1, t2, t3...

[0102] In the above embodiments, one way to generate a variable symbol length is to define a minimum symbol length as tus, and the remaining symbol lengths are determined based on t. For example, t1 = t, t2 = 2t, t3 = 3t, ... can be defined. Figure 5 The diagram illustrates two different symbol lengths according to embodiments of the present invention. Optionally, the value of t can be specified as one of the following values: 1.6 μs, 2 μs, 2.4 μs, 3.2 μs, and 4 μs. Alternatively, a minimum symbol length of t μs can be defined, and different spreading codes can be used to generate symbols of various lengths. Specifically, multiple spreading codes with lengths of 1, 2, 4, 8, etc., can be defined. Different symbol lengths correspond to different spreading codes. For example, if the information bit is 1 and the spreading code length is 1, then the symbol used to carry the information bit 1 contains a symbol of length t μs. If the spreading code length is 4, then the symbol used to carry the information bit 1 contains 4 symbols of length t μs.

[0103] In an embodiment of the present invention, optionally, before each transmission of WUP, the transmitting device needs to determine the symbol length. The symbol length determined by the transmitting device needs to ensure that the power of WUP reaching the receiving device is not less than a preset power threshold (or the average power of symbols in WUP reaching the receiving device is not less than a preset power threshold), or that the packet error rate (PER) of WUP demodulated at the receiving device is less than a preset packet error rate threshold (or the average symbol error rate of symbols in WUP at the receiving device is less than a preset symbol error rate threshold), or that the signal-to-noise ratio of WUP at the receiving device is not less than a preset signal-to-noise ratio threshold (or the average signal-to-noise ratio of symbols in WUP at the receiving device is not less than a preset signal-to-noise ratio threshold). Assuming that the symbol length that satisfies the above conditions is T1, the transmitting device determines that the symbol length T used when transmitting WUP this time is greater than or equal to T1.

[0104] Furthermore, the transmitting device determines the symbol length based on the multipath delay spread, ensuring that the determined symbol length is not less than the multipath delay spread for short-range (indoor environment), or not less than the multipath delay spread for long-range (outdoor environment), or not less than the multipath delay spread under the current communication environment. Assume the symbol length satisfying the above constraints is T2. The transmitting device can determine the symbol length T used for this WUP transmission as a value greater than or equal to the maximum of T1 and T2. Alternatively, the symbol length T determined by the transmitting device satisfies: T1 + T2 ≥ T ≥ T1 or T1 + T2 ≥ T ≥ max(T1, T2). Correspondingly, the receiving device discards the preceding x us or T2 us after each symbol received to avoid inter-symbol interference.

[0105] In the above embodiments, optionally, the transmitting device can reuse an OFDM transmitter. For cases where the symbol length is less than the symbol length in the existing standard, the symbols output by the Inverse Fourier Transform (IFFT) module can be truncated using the existing truncate module in the OFDM transmitter; or, a downsampling module can be used to extract the symbols output by the IFFT module; or a shorter symbol can be generated directly using an IFFT with a smaller number of points, but the present invention is not limited thereto.

[0106] Alternatively, as another example, in S110, one possible implementation of the transmitting device sending the first WUP to the wake-up receiver using the first data rate is: the transmitting device sends the first WUP to the wake-up receiver using the first modulation and coding scheme. Correspondingly, in S120, the transmitting device determines the second modulation and coding scheme, and in S130, the transmitting device sends the second WUP to the wake-up receiver using the second modulation and coding scheme.

[0107] In other words, one specific implementation of sending WUP to the wake-up receiver of the receiving device using a variable data rate is as follows: the sending device sends WUP to the wake-up receiver of the receiving device using a variable coding and modulation method.

[0108] Understandably, variable coding modulation can be specifically manifested as variable frequency modulation order and / or variable phase modulation order and / or variable amplitude modulation order and / or variable coding rate. For example, the variable frequency modulation order and / or variable phase modulation order and / or variable amplitude modulation order could be 2 Amplitude-Shift-Keying (ASK), 4ASK, ... or 2 Frequency-Shift-Keying (FSK), 4FSK, ... or 2 Phase-Shift-Keying (PSK), 4PSK, ... or 4 Quadrature Amplitude Modulation (QAM), 16QAM, ...; for example, variable coding rates could be 1 / 2 BCC coding, 3 / 4 BCC coding, no coding, ...

[0109] In an embodiment of the present invention, optionally, before each transmission of WUP, the transmitting device needs to determine the modulation and coding scheme. The modulation and coding scheme determined by the transmitting device needs to ensure that the power of WUP reaching the receiving device is not less than a preset power threshold (or the average power of the symbols in WUP reaching the receiving device is not less than a preset power threshold), or that the packet error rate (PER) of WUP demodulated at the receiving device is less than a preset packet error rate threshold (or the average symbol error rate of the symbols in WUP at the receiving device is less than a preset symbol error rate threshold), or that the signal-to-noise ratio of WUP at the receiving device is not less than a preset signal-to-noise ratio threshold (or the average signal-to-noise ratio of the symbols in WUP at the receiving device is not less than a preset signal-to-noise ratio threshold).

[0110] Alternatively, as another example, in S110, one possible implementation of the transmitting device sending the first WUP to the wake-up receiver using the first data rate is: the transmitting device sends the first WUP to the wake-up receiver using the first symbol rate and the first modulation and coding scheme. Correspondingly, in S120, the transmitting device determines the second symbol rate and the second modulation and coding scheme, and in S130, the transmitting device sends the second WUP to the wake-up receiver using the second symbol rate and the second modulation and coding scheme.

[0111] In other words, one specific implementation of sending WUP to the wake-up receiver of the receiving device using a variable data rate is as follows: the sending device sends WUP to the wake-up receiver of the receiving device using a variable symbol rate and a variable modulation and coding scheme.

[0112] Variable symbol rate and variable modulation coding scheme can be specifically manifested as variable symbol length + variable frequency modulation order and / or variable phase modulation order and / or variable amplitude modulation order and / or coding rate, for example, t1+2ASK, t2+2ASK, t2+4ASK… A concrete example: 4us + amplitude 0 represents 0, 4us + amplitude A represents 1; 4us + amplitude 0 represents 00, 4us + amplitude A represents 01, 4us + amplitude 2A represents 10, 4us + amplitude 3A represents 11; 2.4us + amplitude 0 represents 0, 2.4us + amplitude A represents 1; 2.4us + amplitude 0 represents 00, 2.4us + amplitude A represents 01, 2.4us + amplitude 2A represents 10, 2.4us + amplitude 3A represents 11.

[0113] In an embodiment of the present invention, optionally, before each transmission of WUP, the transmitting device needs to determine the symbol length and modulation and coding scheme. The symbol length and modulation and coding scheme determined by the transmitting device need to ensure that the power of WUP reaching the receiving device is not less than a preset power threshold (or the average power of symbols in WUP reaching the receiving device is not less than a preset power threshold), or that the packet error rate (PER) of WUP demodulated at the receiving device is less than a preset packet error rate threshold (or the average symbol error rate of symbols in WUP at the receiving device is less than a preset symbol error rate threshold), or that the signal-to-noise ratio of WUP at the receiving device is not less than a preset signal-to-noise ratio threshold (or the average signal-to-noise ratio of symbols in WUP at the receiving device is not less than a preset signal-to-noise ratio threshold).

[0114] In the above embodiments, optionally, the transmitting device can reuse an OFDM transmitter. For cases where the symbol length is less than the symbol length in the existing standard, the symbols output by the Inverse Fourier Transform (IFFT) module can be truncated using the existing truncate module in the OFDM transmitter; or, a downsampling module can be used to extract the symbols output by the IFFT module; or a shorter symbol can be generated directly using an IFFT with a smaller number of points, but the present invention is not limited thereto.

[0115] Optionally, as an embodiment, in S120, when the transmitting device determines the second data rate, it determines the second data rate based on the data rate used when the transmitting device sends data to the master transceiver. For example, if the transmitting device sends data to the master transceiver at a first data rate, and the transmitting device determines that the receiving device can correctly receive the data, then the transmitting device considers the current channel quality to be good and can further increase the data rate used when sending data. Therefore, when sending the second WUP, the transmitting device can use a second data rate higher than the first data rate to send the wake-up packet to the wake-up receiver. Alternatively, if the transmitting device sends data to the master transceiver at a first data rate, and the transmitting device determines that the receiving device cannot correctly receive the data, then the transmitting device considers the current channel quality to be poor and needs to further reduce the data rate used when sending data. Therefore, when sending the second WUP, the transmitting device can use a second data rate lower than the first data rate to send the WUP to the wake-up receiver.

[0116] Optionally, as another embodiment, in S120, when the transmitting device determines the second data rate, it determines the second data rate based on the operating frequency band of the main transceiver and / or the operating frequency band of the wake-up receiver. For example, if the main transceiver operates on the 2.4 GHz band and the wake-up receiver operates on the 5 GHz band, then the transmitting device sends a wake-up packet to the wake-up receiver at the first data rate. If the main transceiver operates on the 5 GHz band and the wake-up receiver operates on the 2.4 GHz band, then the transmitting device sends a wake-up packet to the wake-up receiver at the second data rate. Alternatively, if the main transceiver and the wake-up receiver operate on the same frequency band, then the transmitting device sends a wake-up packet to the wake-up receiver at the first data rate. If the main transceiver and the wake-up receiver operate on different frequency bands, then the transmitting device sends a wake-up packet to the wake-up receiver at the second data rate.

[0117] Alternatively, as another embodiment, such as Figure 6 As shown, S120 specifically includes:

[0118] S121, Feedback information sent by the transmitting end device and the receiving end device through the main transceiver;

[0119] S122, the transmitting device determines the second data rate based on the feedback information.

[0120] Optionally, in S121, the feedback information includes the data rate that the receiving device expects the sending device to use, and the sending device can directly determine the data rate in the feedback information as the second data rate.

[0121] Optionally, in S121, the feedback information includes first information for indicating the signal-to-noise ratio (SNR) at the operating frequency of the master transceiver and / or the wake-up receiver. Correspondingly, in S122, the transmitting device determines the second data rate based on the first information and the correspondence between the SNR and the data rate.

[0122] Optionally, the correspondence between signal-to-noise ratio (SNR) and data rate can be stored in the transmitting device in the form of a table. For example, if all wake-up receivers have the same capability, such as having channel coding capability or not having channel coding capability, a possible correspondence between SNR and data rate can be shown in Table 1.

[0123] Table 1

[0124] <snr_1dB Rate 1 snr_1~snr_2dB Rate 2 snr_2~snr_3dB Speed ​​3 >snr_3dB Rate 4

[0125] Considering the differences in wake-up receiver capabilities—for example, some wake-up receivers have channel coding capabilities while others do not—the receiving device needs to report whether its wake-up receiver supports channel coding when reporting energy. The receiving device can report this when associating with the transmitting device, or it can inform the transmitting device during communication via the master transceiver. A possible correspondence between SNR and data rate is shown in Table 2.

[0126] Table 2

[0127]

[0128] Alternatively, a mapping table between SNR and data rate can be set up separately for wake-up receivers with and without channel coding capabilities. Table 1 shows the mapping between SNR and data rate for wake-up receivers with channel coding capabilities, while Table 3 shows the mapping between SNR and data rate for wake-up receivers without channel coding capabilities.

[0129] Table 3

[0130] <snr_1dB Rate 1' snr_1~snr_2dB Rate 2' snr_2~snr_3dB Rate 3' >snr_3dB Rate 4'

[0131] Furthermore, a set of modulation and coding schemes (MCS) can be specified for the wake-up receiver. The data rate and the modulation and coding scheme have a corresponding relationship. One possible correspondence between the data rate and the modulation and coding scheme is shown in Table 4.

[0132] Table 4

[0133] 0 Rate 1 1 Rate 2 2 Speed ​​3 3 Rate 4 4 Rate 1 + Channel Coding 5 Rate 2+ channel coding 6 Rate 3+ channel coding 7 Rate 4+ channel coding

[0134] Optionally, only MCS0-3 can be specified. For a wake-up receiver without channel coding capability, the current MCS is considered to correspond to rate 1 to rate 4, while for a wake-up receiver with channel coding capability, the current MCS is considered to correspond to rate 1+channel coding to rate 4+channel coding.

[0135] Optionally, the rates in Tables 1 to 3 can be replaced with the MCS method.

[0136] It is understood that the data rate in the table above can be in the form of a variable symbol length, or a variable symbol length plus a variable frequency modulation order and / or a variable phase modulation order and / or a variable amplitude modulation order.

[0137] Optionally, in S121, the feedback information includes second information indicating the power when the first WUP reaches the wake-up receiver. Correspondingly, S122 specifically involves the transmitting device determining the second data rate based on the second information and a preset power threshold; or...

[0138] In S121, the feedback information includes third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiver. Correspondingly, S122 specifically involves the transmitting device determining the second data rate based on the third information and a preset signal-to-noise ratio threshold; or...

[0139] In S121, the feedback information includes fourth information for indicating the packet error rate of the first WUP at the wake-up receiver. Correspondingly, S122 specifically involves the transmitting device determining the second data rate based on the fourth information and a preset packet error rate threshold.

[0140] Optionally, as an embodiment, the specific implementation of the receiving device sending feedback information to the sending device through the master transceiver is as follows: the receiving device sends a Medium Access Control (MAC) frame to the sending device through the master transceiver, and the feedback information is carried in the MAC frame.

[0141] Specifically, this MAC frame is a Quality of Service (QoS) data frame. Figure 7 The frame structure of a QoS data frame according to an embodiment of the present invention is shown, as follows: Figure 7As shown, the QoS data frame includes a Frame Control field, a Duration / ID field, an Address 1 field, an Address 1 field, an Address 3 field, a Sequence Control field, an Address 4 field, a QoS Control field, a High Throughput Control field, a Frame Body field, and a Frame Check Sequence (FCS) field. The HT Control field carries this feedback information.

[0142] Alternatively, the MAC frame may be a QoS null frame, which includes the High Efficient Aggregated Control (HE-A-Control) field. Figure 8 The structure of an efficient aggregation control field according to an embodiment of the present invention is shown. For example... Figure 8 As shown, the HE-A-Control field includes a Very High Throughput field, an Efficiency field, and an Aggregated Control field. The Aggregated Control field includes multiple control fields (Control 1-Control N) and a Padding field. Each control field includes a Control Identifier field and a Control Info field. The Control Info field includes a Number of Separate Streams (NSS) field, an HE-MCS field, a Wake-up Receiver field, a Channel Information field, and a Reserved field. The Wake-up Receiver field carries feedback information.

[0143] In actual communication, the function of each control field is determined by changing the value of the control identifier field. For example, when the control identifier field indicates 2, it means that the information in the control field is used for link adaptation, providing feedback on Channel Quality Indication (CQI), MCS, etc. Furthermore, the indication of the wake-up receiver field determines whether the feedback information is applied to rate adjustment of the wake-up receiver or to link adaptation of the main link. For example, a wake-up receiver field indication of "1" indicates application to rate adjustment of the wake-up receiver, while a wake-up receiver field indication of "0" indicates application to link adaptation of the main link.

[0144] Furthermore, the control information field can also carry Channel Info, indicating which channel / resource block the feedback information is used for. Moreover, it can feedback rate information on multiple channels / resource blocks. A new control identifier field can also be added to carry the feedback information.

[0145] Optionally, this MAC frame is a beamforming report. Figure 9 A structural diagram of a beamforming report according to an embodiment of the present invention is shown. Figure 9 As shown, the beamforming report includes a frame control field, a high-efficiency multiple input multiple output (MIMO) control field, a wake-up receiver rate feedback field, and a frame check sequence field. The wake-up receiver rate feedback field is used to carry feedback information, and the reserved bits of the high-efficiency MIMO control field are used to indicate that the purpose of the beamforming report is to carry feedback information.

[0146] It should be noted that the MAC frames in the embodiments of the present invention are not limited to the types of MAC frames given above, but can also be other types of MAC frames, such as newly defined MAC frames in the standard, or newly defined Action No ACK frames (action frames that do not require an acknowledgment frame), etc.

[0147] Optionally, as an embodiment, the sending device uses an information element to carry feedback information. Figure 10 A structural diagram of an information element according to an embodiment of the present invention is shown. Figure 10 As shown, the information element includes an element identifier field, a length field, an element identifier extension, and an information field. The information field includes a wake-up receiver rate feedback field, which carries feedback information. In actual communication, different element identifier fields can be used to identify different management information carried in the information field. The information element can be carried in a management frame, which can be an Action No ACK frame, an ACK frame, or a Beacon frame, but the invention is not limited to these.

[0148] In the above embodiments, the feedback information on the data rate can be presented as a separate indication for each channel / resource block, or it can first indicate some common information and then indicate the information for each resource block.

[0149] Furthermore, for downlink feedback, in addition to reporting the rates on multiple channels between the STA and AP point-to-point, it is also possible to report the rates between the AP and multiple STAs on multiple channels. Moreover, multiple block acknowledgment (M-BA) frames or trigger frames can be used to carry the data rate.

[0150] For example, Figure 11 The structure of an M-BA frame according to an embodiment of the present invention is shown, as follows: Figure 11 As shown, an M-BA frame includes a Frame Control field, a Duration field, a Receive Address (RA) field, a Transmit Address (TA) field, a BA Control field, a BA Information field, and an FCS field. The BA Information field includes a recurring Pre-STA Info field, a Block ACK Starting Sequence Control field, and a Block ACK Bitmap field. The Pre-STA Info field includes an Association Identifier (AID) field, an ACK / BA field, and a Traffic Identifier (TID) Value field. Special TID / AID values ​​can be used to identify the Block ACK Starting Sequence Control and Block ACK Bitmap fields to carry the data rate for waking up the receiver.

[0151] Figure 12 The structure of a trigger frame according to an embodiment of the present invention is shown. For example... Figure 12 As shown, the trigger frame includes a frame control field, a trigger frame type field, common fields related to the trigger frame type, common information fields, site-specific information fields, and an FCS field. The common fields related to the trigger frame type are used to carry the data rate. Or, as shown... Figure 12 As shown, the site-specific information fields include the wake-up receiver rate field, which is used to carry the data rate.

[0152] It should be noted that the method described above for the AP to report data rates to multiple STAs also applies to the STAs reporting data rates to the AP. This applies not only to the STA reporting data rates for wake-up packets on multiple channels / resource blocks to one AP, but also to the STA reporting data rates for wake-up packets on multiple channels / resource blocks to multiple APs or STAs.

[0153] Optionally, in an embodiment of the present invention, the sending device may indicate to the receiving device the data rate used when transmitting the wake-up packet, so that the receiving device can receive and parse the received wake-up packet according to the data rate. Figure 13 This is a schematic diagram of the structure of a wake-up packet according to another embodiment of the present invention. Figure 13 As shown, the wake-up packet includes a preamble field, a signaling (SIG) field, and a data (payload) field. The preamble field is used by the receiving device for Automatic Gain Control (ACG) and time synchronization. The signaling field includes a rate indicator field, which indicates a second data rate. This signaling field may also include fields for carrying other information used to parse the data; however, this invention does not limit this.

[0154] Furthermore, if the receiving device's wake-up receiver receives the wake-up packet but cannot immediately adjust the data rate, then... Figure 14 As shown, a redundant field is added after the SIG field (or the rate indication field if the SIG field only includes the rate indication field). The redundant field can include N symbols, where N is a positive integer greater than or equal to 1, to facilitate waking up the receiver to adjust the data rate.

[0155] Optionally, as an embodiment, M symbols with a fixed data rate (symbol length and / or MCS) can be placed after the SIG field, where M can be 1, 2, ..., so that the receiving device can perform channel estimation based on these M symbols with fixed data rates.

[0156] Optionally, as an embodiment, the receiving device can determine the second data rate based on the correspondence between the preamble pattern and the data rate. For example, a preamble pattern and data rate correspondence can be preset. After the receiving device determines the preamble pattern, it can determine the current data rate based on the determined preamble pattern and this correspondence. For example, if the preamble pattern is 10101010, the data rate of the subsequent data portion is considered to be rate 1; if the preamble pattern is 110011001100, the data rate of the subsequent data portion is considered to be rate 2. Alternatively, if the preamble field includes an additional sequence after the field carrying information for time synchronization or AGC of the receiving device, the receiving device can determine the data rate based on this additional sequence. For example, if the preamble field is "time synchronization / AGC" codeword + sequence 1, the receiving device determines the data rate to be rate 1; if the preamble field is "time synchronization / AGC + sequence 2", the receiving device determines the data rate to be rate 2.

[0157] Optionally, as an embodiment, the receiving device can determine the data rate of the wake-up packet based on the data rate used by the master transceiver. Specifically, there is a correspondence between the data rate of the wake-up packet and the data rate of the master transceiver. For example, if the master transceiver uses MCS0-2, the wake-up packet uses a rate of 1; if the master transceiver uses MCS3-5, the wake-up packet uses a rate of 2.

[0158] Optionally, as an embodiment, the receiving device can determine the data rate of the wake-up packet based on the operating frequency band of the master transceiver and / or the operating frequency band of the wake-up link. For example, when the master transceiver and the wake-up transceiver are in the same operating frequency band (both at 2.4 GHz or both at 5 GHz), the wake-up packet uses rate 1; when the master transceiver and the wake-up receiver are in different operating frequency bands (the master transceiver is at 2.4 GHz and the wake-up link is at 5 GHz), the wake-up packet uses rate 2; and when the master transceiver and the wake-up receiver are in different operating frequency bands (the master transceiver is at 5 GHz and the wake-up link is at 2.4 GHz), the wake-up packet uses rate 3.

[0159] Optionally, as an embodiment, the receiving device can determine the data rate based on the negotiation result between the master transceiver and the sending device. For example, the receiving device can inform the sending device of its expected data rate by sending the QoS data frame, QoS blank frame, or beamforming report mentioned above. If the sending device confirms that the data transmission rate expected by the receiving device can be used, the sending device sends an acknowledgment frame to the receiving device. After receiving the acknowledgment frame sent by the sending device, the receiving device considers that the data rate of the subsequent wake-up packet transmitted by the sending device is the data rate it previously expected.

[0160] Alternatively, as another embodiment, if the receiving device is a STA and the sending device is an AP, then when the STA is associated with the AP, the AP directly determines the data rate used when transmitting wake-up packets to the STA based on the STA's distance from itself. The sending device can update the data rate during data interaction through the main link with the master transceiver, for example, through interaction via Operation Mode Notification.

[0161] It should be noted that in the above-described scheme of informing the receiving device of the data rate by carrying information indicating the data rate through the SIG field, the sending device may use different data rates when sending the preamble field, SIG field, and data field in the wake-up packet to the receiving device. The sending of the preamble field and SIG field may use a more robust rate.

[0162] In other schemes mentioned above that inform the receiving device of the data rate, the receiving end can use a specific data rate to parse the preamble and SIG fields, and parse the data according to the data rate calculated or agreed upon in the above scheme. In this case, the sending device can use different data rates when sending the preamble field and the data field, using a more robust data rate when sending the preamble field; or, the receiving device can use the data rate agreed upon or negotiated in the above scheme to parse the entire wake-up packet. In this case, the sending device uses the same data rate to send the preamble field and the data field.

[0163] When the sending device sends a wake-up packet to the wake-up receiver of the receiving device, the sending device needs to inform the receiving device whether the wake-up packet being sent is intended for its own wake-up receiver. Therefore, Figure 13 Alternatively, the data field portion of the wake-up packet structure shown in Figure 14 includes a MAC header field, which contains an identification information field. This identification information field carries the identification information of the receiving device. This identification information can be a MAC Address, AID, or Partial AID. To avoid unnecessary overhead caused by an excessive number of information bits in the identification information field, the number of information bits in the identification information field can be positively correlated with the magnitude of the second data rate.

[0164] Assuming the identifier ID is AID, for receiving devices requiring lower data rates, the first bit of their AID is set to 1, while the first bit of the AID of other receiving devices requiring higher data rates is set to 0. Assuming there are n receiving devices requiring lower data rates, the address information field only needs to include 1 + ceil(log2(n)) bits to distinguish each receiving device, where ceil() is the floor function. Alternatively, more generally, the first s bits of the AID can identify user groups with different data rates. For example, for s = 2, 00 represents the user group with the highest data rate, 01 represents the second highest, 10 represents the third highest, and 11 represents the user group with the lowest. Subsequent bit combinations are used to distinguish each user group, as shown below. Figure 15 As shown in the diagram. Furthermore, if combined with the data rate indication method described above, then when the wake-up packet carries... Figure 15 When the AID is shown, the first 2 bits do not need to be transmitted.

[0165] Optionally, the MAC header field may also include a bit count indicator field, which carries information indicating the number of information bits included in the identification information field. This bit count indicator field may indicate the specific number of information bits, or it may indicate the correspondence between the number of information bits and the data rate.

[0166] Furthermore, when assigning IDs to receiving devices that require lower data rates, try to avoid the occurrence of multiple symbols with zero energy consecutively, in order to reduce the transmission of redundant information.

[0167] In all the above embodiments, when the transmitting device sends the second WUP to the wake-up receiver of the receiving device using the second data rate, the transmitting device modulates the information bits in the second WUP into multiple modulation symbols according to the second data rate. The multiple modulation symbols include a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of non-zero. Then, the transmitting device sends the multiple modulation symbols to the wake-up receiver of the receiving device.

[0168] Optionally, as an example, when the transmitting device sends multiple modulation symbols to the wake-up receiver of the receiving device, a placeholder (ON) symbol can be inserted every N modulation symbols to occupy the channel and prevent other receiving devices from preempting the channel and affecting the transmission of the wake-up packet due to the channel being idle for a long time. Here, N can be a fixed value, for example, N can be 4. N can also be a value determined by the symbol length of the modulation symbols. For example, assuming the symbol length is x μs, and the maximum time the communication system can accept continuously transmitted modulation symbols with zero energy is yus (y can be predefined in the standard, or agreed upon by the AP when associating with the STA), then N = floor(y / x). Assuming x = 4 and y = 25, then N = floor(25 / 4) = 6. Alternatively, N can have a one-to-one correspondence with the symbol length. For example, it can be agreed that a symbol length of 2 μs corresponds to N = 12, a symbol length of 4 μs corresponds to N = 6, a symbol length of 8 μs corresponds to N = 3, and so on.

[0169] Correspondingly, during the reception process, the receiving device's wake-up receiver ignores the next symbol after receiving N modulation symbols. If N varies with the symbol length, the receiving device can obtain the current symbol length based on explicit or implicit instructions from the transmitting device, and then determine N values ​​according to the calculation method of N mentioned above or the one-to-one correspondence between N and symbol length.

[0170] Alternatively, as another example, when the transmitting device sends multiple modulation symbols to the wake-up receiver of the receiving device, a placeholder symbol can be inserted every N times the energy of the first modulation symbol is 0. The choice of N is the same as the method described above, and will not be repeated here.

[0171] Correspondingly, the receiving device ignores the next symbol after receiving N first modulation symbols with zero symbol energy.

[0172] It should be noted that the placeholder symbols mentioned above do not carry information bits, but the symbol energy of the placeholder symbols is not 0.

[0173] Optionally, the transmitting device can multiplex the OFDM transmitter to generate multiple time-domain symbols corresponding to the information bits in the second WUP. The generation method for time-domain symbols with non-zero symbol energy is as follows: the transmitting device generates a time-domain sequence s_pre, where the values ​​have the same amplitude; performs a Fast Fourier Transform (FFT) on s_pre to obtain a frequency-domain sequence s; fills s onto the subcarriers in the operating frequency band of the wake-up receiver; and then performs an IFFT to transform it to the time domain to form time-domain symbols. The length of the time-domain sequence s_pre can be determined based on the ratio of the operating bandwidth of the wake-up receiver to the subcarrier width. For example, if the operating bandwidth of the wake-up receiver is 4MHz and the subcarrier width is 312.5kHz, then the length of s_pre is 13; if the operating bandwidth of the wake-up receiver is 4MHz and the subcarrier width is 78.125kHz, then the length of s_pre is 52. Optionally, for ease of operation of the FFT transformation, the length of s_pre can be specified as an even number.

[0174] Alternatively, the transmitting device can directly determine the frequency domain sequence s, where n zeros are spaced between two adjacent non-zero values ​​in the s sequence, and n can be 1, 2, 3, or 4. For example, s with n = 1 can be represented as: s = [s1, 0, s2, 0, s3, 0, s4...].

[0175] In embodiments of the present invention, optionally, such as Figure 16 As shown, the transmitting device can send wake-up packets to different receiving devices at different frequencies in a single transmission. When generating the time-domain symbol corresponding to the information bits in the wake-up packet for each receiving device, the transmitting device can first multiply the s of the wake-up packet for each receiving device by a different rotation factor. For example, the rotation factor can be selected from [1-1j-j], where 1 represents no rotation, -1 represents a 180° rotation, j represents a 90° rotation, and -j represents a -90° rotation. In a specific example, when transmitting four wake-up packets simultaneously, the rotation factor corresponding to the s sequence of wake-up packets 1 to 4 is [1-1-1-1], that is, the subcarrier s corresponding to wake-up packet 1 is filled with -s, and the subcarriers corresponding to wake-up packets 2 to 4 are filled with -s.

[0176] Alternatively, the transmitting device can generate a full-bandwidth padding sequence s. When a wake-up packet needs to be transmitted on the corresponding frequency point, the value at the corresponding position in s is used to pad the corresponding subcarrier. For example, s can use an l-stf sequence.

[0177]

[0178] When only wake-up packet 1 needs to be transmitted, the corresponding subcarrier is filled with the value at the corresponding position of the full-bandwidth filling sequence s. For example, the 13 subcarriers corresponding to 4M are filled with the sequence "0 0 1+j 0 0 0 -1 -j 0 0 0 1+j 0 0".

[0179] The above combination Figures 4 to 16 The method for transmitting a wake-up packet in a communication system according to embodiments of the present invention is described in detail below, in conjunction with... Figure 17 A detailed description of the transmitting device according to an embodiment of the present invention is provided.

[0180] Figure 17 A transmitting device in a communication system according to an embodiment of the present invention is illustrated. The communication system includes the transmitting device and a receiving device, the receiving device including a wake-up receiving module and a main transceiver module. Figure 17 As shown, the transmitting device 10 includes:

[0181] Transceiver module 11 is used to send a first wake-up packet WUP to the wake-up receiving module at a first data rate;

[0182] Module 12 is used to determine the second data rate;

[0183] The transceiver module 11 is also used to send a second WUP to the wake-up receiving module using the second data rate.

[0184] Therefore, according to the embodiments of the present invention, the transmitting device can send wake-up packets to the receiving device at different data rates. Thus, the transmitting device can determine the appropriate data rate for sending wake-up packets based on the specific transmission conditions during communication, thereby improving the transmission efficiency of wake-up packets.

[0185] In an embodiment of the present invention, optionally, in sending the first wake-up packet to the wake-up receiving module using a first data rate, the transceiver module 11 is specifically configured to: send the first WUP to the wake-up receiving module using a first symbol rate;

[0186] Specifically, in determining the second data rate, the determining module 12 is used to: determine the second symbol rate;

[0187] In sending the second WUP to the wake-up receiving module using the second data rate, the transceiver module 11 is specifically configured to: send the second WUP to the wake-up receiving module using the second symbol rate.

[0188] In an embodiment of the present invention, optionally, in sending a first wake-up packet (WUP) to the wake-up receiving module using a first data rate, the transceiver module 11 is specifically configured to: send the first WUP to the wake-up receiving module using a first modulation and coding scheme;

[0189] Specifically, in determining the second data rate, the determining module 12 is used to: determine the second modulation and coding scheme;

[0190] In sending the second WUP to the wake-up receiving module using the second data rate, the transceiver module 11 is specifically configured to: send the second WUP to the wake-up receiving module using the second modulation and coding scheme.

[0191] In an embodiment of the present invention, optionally, in determining the second data rate, the determining module 12 is specifically configured to: determine the second data rate based on the data rate used when sending data to the main transceiver module.

[0192] In an embodiment of the present invention, optionally, in determining the second data rate, the determining module 12 is specifically configured to: determine the second data rate based on the operating frequency band of the main transceiver module and / or the wake-up receiving module.

[0193] In an embodiment of the present invention, optionally, in determining the second data rate, the determining module 12 is specifically used to: determine the symbol length corresponding to the second data rate based on the multipath delay spread.

[0194] In an embodiment of the present invention, optionally, in determining the second data rate, the transceiver module 11 is configured to: receive feedback information sent by the receiving device through the main transceiver module;

[0195] The determining module 12 is used to determine the second data rate based on the feedback information.

[0196] In an embodiment of the present invention, optionally, the feedback information includes first information for indicating the signal-to-noise ratio at the operating frequency of the main transceiver module and / or the wake-up receiving module;

[0197] Specifically, in determining the second data rate based on the feedback information, the determining module 12 is used to: determine the second data rate based on the first information and the correspondence between the signal-to-noise ratio and the data rate.

[0198] In an embodiment of the present invention, optionally, the feedback information includes second information indicating the power when the first WUP reaches the wake-up receiving module, wherein, in determining the second data rate based on the feedback information, the determining module 12 is configured to: determine the second data rate based on the second information and a preset power threshold; or,

[0199] The feedback information includes third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiving module, wherein, in determining the second data rate based on the feedback information, the determining module 12 is configured to: determine the second data rate based on the third information and a preset signal-to-noise ratio threshold; or,

[0200] The feedback information includes fourth information for indicating the packet error rate of the first WUP at the wake-up receiving module, wherein, in determining the second data rate based on the feedback information, the determining module 12 is configured to: determine the second data rate based on the fourth information and a preset packet error rate threshold.

[0201] In an embodiment of the present invention, optionally, in receiving feedback information sent by the receiving device through the main transceiver module, the transceiver module 11 is specifically configured to: receive a Media Access Control (MAC) frame sent by the receiving device through the main transceiver module, wherein the MAC frame carries the feedback information.

[0202] In an embodiment of the present invention, optionally, in receiving a Media Access Control (MAC) frame sent by the receiving device through the main transceiver module, the transceiver module 11 is specifically configured to: receive a Quality of Service (QoS) data frame sent by the receiving device through the main transceiver module, the QoS data frame including a high throughput control field carrying the feedback information; or, receive a QoS blank frame sent by the receiving device through the main transceiver module, the QoS blank frame including a high efficiency aggregation control field carrying the feedback information; or, receive a beamforming report sent by the receiving device through the main transceiver module, the beamforming report including a feedback field carrying the feedback information.

[0203] In an embodiment of the present invention, optionally, in sending the second WUP to the wake-up receiving module using the second data rate, the transceiver module 11 is specifically configured to: modulate the information bits in the second WUP into a plurality of modulation symbols according to the second data rate, the plurality of modulation symbols including a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of not 0; and send the plurality of modulation symbols to the wake-up receiving module.

[0204] In an embodiment of the present invention, optionally, in sending the plurality of modulation symbols to the wake-up receiving module, the transceiver module 11 is specifically configured to: send the plurality of modulation symbols to the wake-up receiving module by sending a placeholder symbol to the wake-up receiving module for every first preset number of modulation symbols sent to the wake-up receiving module, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0; or, send the plurality of modulation symbols to the wake-up receiving module by sending a placeholder symbol to the wake-up receiving module for every second preset number of the first modulation symbols sent to the wake-up receiving module, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0205] In an embodiment of the present invention, the second WUP optionally includes a signaling field and a data field arranged in the transmission sequence, wherein the signaling field carries indication information for indicating the second data rate.

[0206] Optionally, in an embodiment of the present invention, the second WUP further includes a redundant field, the transmission time of which is after the transmission time of the signaling field and before the transmission time of the data field.

[0207] In an embodiment of the present invention, optionally, the second WUP includes a preamble field and a data field according to the transmission timing, so that the receiving device can determine the second data rate according to the preamble mode corresponding to the preamble field and a preset correspondence, wherein the preset correspondence includes the correspondence between the preamble mode and the data rate.

[0208] Optionally, in an embodiment of the present invention, the second WUP includes a MAC header field, the MAC header field includes an identification information field, the identification information field is used to carry the identification information of the receiving device, and the determining module 12 is further configured to: determine the number of information bits included in the identification information field according to the second data rate, wherein the number of information bits included in the identification information field is positively correlated with the magnitude of the second data rate.

[0209] It should be understood that the transmitting device 10 according to the embodiments of the present invention may correspond to the method 100 for transmitting a wake-up packet in the communication system according to the embodiments of the present invention, and the above and other operations and / or functions of each module in the transmitting device 10 are respectively for implementing the corresponding process executed by the transmitting device in the method 100. For the sake of brevity, they will not be described in detail here.

[0210] Figure 18 A receiving device in a communication system according to an embodiment of the present invention is shown. The communication system includes a transmitting device and the receiving device. Figure 18 As shown, the receiving device 20 includes a wake-up receiving module 21, a main receiving module 22, and a determination module 23, wherein:

[0211] The wake-up receiving module 21 is used to receive the first wake-up packet WUP sent by the sending device at the first data rate;

[0212] The wake-up receiving module 21 is also used to receive the second WUP sent by the sending device at the second data rate;

[0213] The determining module 23 is used to determine the second data rate;

[0214] The determining module 23 is also used to parse the second WUP according to the second data rate.

[0215] Therefore, in the communication system according to the present invention, the receiving end device receives wake-up packets sent by the sending end device at different data transmission rates, and the sending end device can determine the appropriate data rate for sending the wake-up packet according to the specific transmission conditions during the communication process, thereby improving the transmission efficiency of the wake-up packet.

[0216] In an embodiment of the present invention, optionally, in receiving the first wake-up WUP sent by the transmitting device at a first data rate, the wake-up receiving module 21 is specifically configured to: receive the first WUP sent by the transmitting device at a first symbol rate;

[0217] In receiving a second WUP transmitted by the transmitting device at a second data rate, the wake-up receiving module 21 is configured to: receive the second WUP transmitted by the transmitting device at the second symbol rate; in determining the second data rate, the determining module 23 is specifically configured to: determine the second symbol rate; in parsing the second WUP according to the second data rate, the determining module 23 is specifically configured to: parsing the second WUP according to the second symbol rate.

[0218] In an embodiment of the present invention, optionally, in receiving a first wake-up WUP sent by the transmitting device at a first data rate, the wake-up receiving module 21 is specifically configured to: receive the first WUP sent by the transmitting device using a first modulation and coding scheme; in receiving a second WUP sent by the transmitting device at a second data rate, the wake-up receiving module 21 is specifically configured to: receive the second WUP sent by the transmitting device using the second modulation and coding scheme; in determining the second data rate, the determining module 23 is specifically configured to: determine the second modulation and coding scheme; in parsing the second WUP according to the second data rate, the determining module 23 is specifically configured to: parsing the second WUP according to the second modulation and coding scheme.

[0219] In an embodiment of the present invention, optionally, the main receiving module 22 is specifically used to: send feedback information to the transmitting device so that the transmitting device can determine the second data rate based on the feedback information.

[0220] In an embodiment of the present invention, optionally, the feedback information includes first information for indicating the signal-to-noise ratio of the operating frequency of the main transceiver module and / or the wake-up receiving module, so that the transmitting device can determine the second data rate based on the first information and the correspondence between the signal-to-noise ratio and the data rate.

[0221] In an embodiment of the present invention, optionally, the feedback information includes second information indicating the power of the first WUP when it reaches the wake-up receiving module, so that the transmitting device can determine the second data rate based on the second information and a preset power threshold; or, the feedback information includes third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiving module, so that the transmitting device can determine the second data rate based on the third information and a preset signal-to-noise ratio threshold; or, the feedback information includes fourth information indicating the packet error rate of the first WUP at the wake-up receiving module, so that the transmitting device can determine the second data rate based on the fourth information and a preset packet error rate threshold.

[0222] In an embodiment of the present invention, optionally, in sending feedback information to the sending end device, the main transceiver module is configured to: send a Media Access Control (MAC) frame to the sending end device, the MAC frame carrying the feedback information.

[0223] In an embodiment of the present invention, optionally, in sending a Medium Access Control (MAC) frame to the transmitting device, the main transceiver module 22 is specifically configured to: send a Quality of Service (QoS) data frame to the transmitting device, the QoS data frame including a high throughput control field, the high throughput control field carrying the feedback information; or, send a QoS blank frame to the transmitting device, the QoS blank frame including an efficient aggregation control field, the efficient aggregation control field carrying the feedback information; or, send a beamforming report to the transmitting device, the beamforming report including a feedback field, the feedback field carrying the feedback information.

[0224] In an embodiment of the present invention, optionally, in receiving the second WUP transmitted by the transmitting device at the second data rate, the wake-up receiving module 21 is specifically configured to: receive a plurality of modulation symbols transmitted by the transmitting device, wherein the plurality of modulation symbols are obtained by the transmitting device modulating the information bits in the second WUP according to the second data rate, and the plurality of modulation symbols include a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of not 0.

[0225] In an embodiment of the present invention, optionally, the plurality of modulation symbols are sent by the transmitting end device in a manner that for every first preset number of modulation symbols sent to the wake-up receiving module 21, a placeholder symbol is sent to the wake-up receiving module 21, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0226] Specifically, in receiving multiple modulation symbols sent by the transmitting device, the wake-up receiving module 21 is used to receive the multiple modulation symbols by ignoring one placeholder symbol for each first preset number of modulation symbols received.

[0227] In an embodiment of the present invention, optionally, the plurality of modulation symbols are sent by the transmitting end device in a manner that for every second preset number of the second modulation symbols sent to the wake-up receiving module 21, a placeholder symbol is sent to the wake-up receiving module 21. The placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0228] Specifically, in receiving multiple modulation symbols sent by the transmitting device, the wake-up receiving module 21 is used to receive the multiple modulation symbols by ignoring one placeholder symbol for each second preset number of the second modulation symbols received.

[0229] In an embodiment of the present invention, optionally, the second WUP includes a signaling field and a data field arranged in the transmission sequence, the signaling field carrying indication information for indicating the second data rate; wherein, in determining the second data rate, the determining module 23 is specifically used to: determine the second data rate according to the indication information.

[0230] Optionally, in an embodiment of the present invention, the second WUP further includes a redundant field, the transmission time of which is after the transmission time of the signaling field and before the transmission time of the data field.

[0231] In an embodiment of the present invention, the second WUP may optionally include a preamble field and a data field according to the transmission timing.

[0232] Specifically, in determining the second data rate, the determining module 23 is used to: determine the second data rate based on the preamble mode corresponding to the preamble field and a preset correspondence, wherein the preset correspondence includes the correspondence between the preamble mode and the data rate.

[0233] In an embodiment of the present invention, optionally, the second WUP includes a MAC header field, the MAC header field includes an identification information field, the identification information field is used to carry the identification information of the receiving device, and the number of information bits included in the identification information field is positively correlated with the size of the second data rate.

[0234] It should be understood that the receiving device 20 according to the embodiments of the present invention may correspond to the method 100 for transmitting wake-up packets in the communication system according to the embodiments of the present invention, and the above and other operations and / or functions of each module in the receiving device 20 are respectively for implementing the corresponding process executed by the receiving device in the method 100. For the sake of brevity, they will not be described in detail here.

[0235] Figure 19This is a schematic structural diagram of a transmitting device in a communication system according to another embodiment of the present invention. The communication system includes the transmitting device and a receiving device, the receiving device including a wake-up receiver and a master transceiver. Figure 19 The sending device can execute the processes executed by the sending device in each process of method 100. Figure 19 The transmitting device 100 includes a transceiver 110, a processor 120, and a memory 130. The processor 120 controls the operation of the transmitting device 100 and can be used to process signals. The memory 130 may include read-only memory and random access memory, and provides instructions and data to the processor 120. The various components of the transmitting device 100 are coupled together via a bus system 140, which includes a data bus, a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 140 in the figures.

[0236] Specifically, the transceiver 110 is used to: send a first wake-up packet (WUP) to the wake-up receiving module at a first data rate; the processor 120 is used to determine a second data rate; and the transceiver 110 is also used to send a second WUP to the wake-up receiving module at the second data rate.

[0237] It should be understood that, in this embodiment of the invention, the processor 120 may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0238] The memory 130 may include read-only memory and random access memory, and provides instructions and data to the processor 120. A portion of the memory 130 may also include non-volatile random access memory. For example, the memory 130 may also store device type information.

[0239] In addition to the data bus, the bus system 140 may also include a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 140 in the figure.

[0240] In implementation, each step of the above method can be completed by the integrated logic circuitry of the hardware in the processor 120 or by instructions in software form. The steps of the method disclosed in the embodiments of this invention can be directly manifested as execution by the hardware processor, or as a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 130, and the processor 120 reads the information in memory 130 and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0241] Optionally, as an embodiment, in sending the first wake-up packet to the wake-up receiver at a first data rate, the transceiver 110 is specifically configured to: send the first WUP to the wake-up receiver at a first symbol rate;

[0242] Specifically, in determining the second data rate, the processor 120 is used to: determine the second symbol rate;

[0243] In transmitting the second WUP to the wake-up receiver using the second data rate, the transceiver 110 is specifically configured to transmit the second WUP to the wake-up receiver using the second symbol rate.

[0244] Optionally, as an embodiment, in sending a first wake-up packet (WUP) to the wake-up receiver using a first data rate, the transceiver 110 is specifically configured to: send the first WUP to the wake-up receiver using a first modulation and coding scheme;

[0245] Specifically, in determining the second data rate, the processor 120 is used to: determine the second modulation and coding scheme;

[0246] In transmitting the second WUP to the wake-up receiver using the second data rate, the transceiver 110 is specifically configured to transmit the second WUP to the wake-up receiver using the second modulation and coding scheme.

[0247] Optionally, as an embodiment, in determining the second data rate, the processor 120 is specifically configured to: determine the second data rate based on the data rate used when sending data to the master transceiver.

[0248] Optionally, as an embodiment, in determining the second data rate, the processor 120 is specifically configured to: determine the second data rate based on the operating frequency band of the master transceiver and / or the wake-up receiver.

[0249] Optionally, as an embodiment, in determining the second data rate, the processor 120 is specifically configured to: determine the symbol length corresponding to the second data rate based on the multipath delay spread.

[0250] Optionally, as an embodiment, in determining the second data rate, the transceiver 110 is configured to: receive feedback information sent by the receiving device through the master transceiver;

[0251] The processor 120 is used to determine the second data rate based on the feedback information.

[0252] Optionally, as an embodiment, the feedback information includes first information for indicating the signal-to-noise ratio at the operating frequency of the master transceiver and / or the wake-up receiver;

[0253] Specifically, in determining the second data rate based on the feedback information, the processor 120 is configured to: determine the second data rate based on the first information and the correspondence between the signal-to-noise ratio and the data rate.

[0254] Optionally, as an embodiment, the feedback information includes second information indicating the power when the first WUP arrives at the wake-up receiver, wherein, in determining the second data rate based on the feedback information, the processor 120 is configured to: determine the second data rate based on the second information and a preset power threshold; or,

[0255] The feedback information includes third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiver, wherein, in determining the second data rate based on the feedback information, the processor 120 is configured to: determine the second data rate based on the third information and a preset signal-to-noise ratio threshold; or,

[0256] The feedback information includes fourth information for indicating the packet error rate of the first WUP at the wake-up receiver, wherein, in determining the second data rate based on the feedback information, the processor 120 is configured to: determine the second data rate based on the fourth information and a preset packet error rate threshold.

[0257] Optionally, as an embodiment, in receiving feedback information sent by the receiving device through the master transceiver, the transceiver 110 is specifically configured to: receive a Media Access Control (MAC) frame sent by the receiving device through the master transceiver, the MAC frame carrying the feedback information.

[0258] Optionally, as an embodiment, in receiving a Media Access Control (MAC) frame sent by the receiving device through the master transceiver, the transceiver 110 is specifically configured to: receive a Quality of Service (QoS) data frame sent by the receiving device through the master transceiver, the QoS data frame including a high throughput control field carrying the feedback information; or, receive a QoS blank frame sent by the receiving device through the master transceiver, the QoS blank frame including an efficient aggregation control field carrying the feedback information; or, receive a beamforming report sent by the receiving device through the master transceiver, the beamforming report including a feedback field carrying the feedback information.

[0259] Optionally, as an embodiment, in transmitting the second WUP to the wake-up receiver at the second data rate, the transceiver 110 is specifically configured to: modulate the information bits in the second WUP into a plurality of modulation symbols according to the second data rate, the plurality of modulation symbols including a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of not 0; and transmit the plurality of modulation symbols to the wake-up receiver module.

[0260] Optionally, as an embodiment, in sending the plurality of modulation symbols to the wake-up receiver, the transceiver 110 is specifically configured to: send the plurality of modulation symbols to the wake-up receiver by sending one placeholder symbol to the wake-up receiver for every first preset number of the modulation symbols sent to the wake-up receiver, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0; or, send the plurality of modulation symbols to the wake-up receiver by sending one placeholder symbol to the wake-up receiver for every second preset number of the first modulation symbols sent to the wake-up receiver, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0261] Optionally, as an embodiment, the second WUP includes a signaling field and a data field arranged in the transmission sequence, the signaling field carrying indication information for indicating the second data rate.

[0262] Optionally, as an embodiment, the second WUP also includes a redundancy field, the transmission time of which is after the transmission time of the signaling field and before the transmission time of the data field.

[0263] Optionally, as an embodiment, the second WUP includes a preamble field and a data field according to the transmission timing, so that the receiving device can determine the second data rate according to the preamble mode corresponding to the preamble field and a preset correspondence, wherein the preset correspondence includes the correspondence between the preamble mode and the data rate.

[0264] Optionally, as an embodiment, the second WUP includes a MAC header field, which includes an identification information field. The identification information field is used to carry the identification information of the receiving device. The processor 120 is further configured to: determine the number of information bits included in the identification information field according to the second data rate, wherein the number of information bits included in the identification information field is positively correlated with the magnitude of the second data rate.

[0265] It should be understood that the transmitting device 100 according to the embodiments of the present invention may correspond to the transmitting device 10 according to the embodiments of the present invention, and may correspond to the corresponding subject in the method of transmitting a wake-up packet in the communication system according to the embodiments of the present invention. The above and other operations and / or functions of each module in the transmitting device 100 are respectively for implementing the corresponding process in the method 100. For the sake of brevity, they will not be described in detail here.

[0266] Therefore, according to the embodiments of the present invention, the transmitting device can send wake-up packets to the receiving device at different data rates. Thus, the transmitting device can determine the appropriate data rate for sending wake-up packets based on the specific transmission conditions during communication, thereby improving the transmission efficiency of wake-up packets.

[0267] Figure 20 This is a schematic structural diagram of a receiving device in a communication system according to another embodiment of the present invention. The communication system includes a transmitting device and the receiving device. Figure 20 The receiving device can execute the processes executed by the receiving device in each process of method 100. Figure 20 The receiving device 200 includes a wake-up receiver 210, a master transceiver 220, a processor 230, and a memory 240. The processor 230 controls the operation of the receiving device 200 and can be used to process signals. The memory 240 may include read-only memory and random access memory, and provides instructions and data to the processor 230. The various components of the receiving device 200 are coupled together via a bus system 250, which includes a data bus, a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 250 in the figure.

[0268] Specifically, the wake-up receiver 210 is used to receive a first wake-up packet (WUP) sent by the transmitting device at a first data rate; the wake-up receiver 210 is also used to receive a second WUP sent by the transmitting device at a second data rate; the processor 230 is used to determine the second data rate; the processor 230 is also used to parse the second WUP according to the second data rate.

[0269] It should be understood that, in this embodiment of the invention, the processor 230 may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0270] The memory 240 may include read-only memory and random access memory, and provides instructions and data to the processor 230. A portion of the memory 240 may also include non-volatile random access memory. For example, the memory 240 may also store device type information.

[0271] In addition to the data bus, the bus system 250 may also include a power bus, a control bus, and a status signal bus. However, for clarity, all buses are labeled as bus system 250 in the diagram.

[0272] In implementation, each step of the above method can be completed by the integrated logic circuitry of the hardware in the processor 230 or by instructions in software form. The steps of the method disclosed in the embodiments of this invention can be directly manifested as execution by the hardware processor, or as a combination of hardware and software modules in the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 240, and the processor 230 reads the information in memory 240 and, in conjunction with its hardware, completes the steps of the above method. To avoid repetition, detailed descriptions are not provided here.

[0273] Optionally, as an embodiment, in receiving the first wake-up WUP transmitted by the transmitting device at a first data rate, the wake-up receiver 210 is specifically configured to: receive the first WUP transmitted by the transmitting device at a first symbol rate;

[0274] In receiving a second WUP transmitted by the transmitting device at a second data rate, the wake-up receiver 210 is configured to: receive the second WUP transmitted by the transmitting device at the second symbol rate; in determining the second data rate, the processor 230 is specifically configured to: determine the second symbol rate; in parsing the second WUP according to the second data rate, the processor 230 is specifically configured to: parse the second WUP according to the second symbol rate.

[0275] Optionally, as an embodiment, in receiving a first wake-up WUP transmitted by the transmitting device at a first data rate, the wake-up receiver 210 is specifically configured to: receive the first WUP transmitted by the transmitting device using a first modulation and coding scheme; in receiving a second WUP transmitted by the transmitting device at a second data rate, the wake-up receiver 210 is specifically configured to: receive the second WUP transmitted by the transmitting device using the second modulation and coding scheme; in determining the second data rate, the processor 230 is specifically configured to: determine the second modulation and coding scheme; in parsing the second WUP according to the second data rate, the processor 230 is specifically configured to: parse the second WUP according to the second modulation and coding scheme.

[0276] Optionally, as an embodiment, the master transceiver 220 is specifically used to: send feedback information to the transmitting device so that the transmitting device can determine the second data rate based on the feedback information.

[0277] Optionally, as an embodiment, the feedback information includes first information indicating the signal-to-noise ratio of the operating frequency of the master transceiver 220 and / or the wake-up receiver 210, so that the transmitting device can determine the second data rate based on the first information and the correspondence between the signal-to-noise ratio and the data rate.

[0278] Optionally, as an embodiment, the feedback information includes second information indicating the power of the first WUP when it arrives at the wake-up receiver, so that the transmitting device can determine the second data rate based on the second information and a preset power threshold; or, the feedback information includes third information indicating the signal-to-noise ratio of the first WUP at the wake-up receiver, so that the transmitting device can determine the second data rate based on the third information and a preset signal-to-noise ratio threshold; or, the feedback information includes fourth information indicating the packet error rate of the first WUP at the wake-up receiver, so that the transmitting device can determine the second data rate based on the fourth information and a preset packet error rate threshold.

[0279] Optionally, as an embodiment, in sending feedback information to the transmitting device, the master transceiver 220 is configured to: send a Media Access Control (MAC) frame to the transmitting device, the MAC frame carrying the feedback information.

[0280] Optionally, as an embodiment, in sending a Media Access Control (MAC) frame to the transmitting device, the master transceiver 220 is specifically configured to: send a Quality of Service (QoS) data frame to the transmitting device, the QoS data frame including a high throughput control field carrying the feedback information; or, send a QoS blank frame to the transmitting device, the QoS blank frame including an efficient aggregation control field carrying the feedback information; or, send a beamforming report to the transmitting device, the beamforming report including a feedback field carrying the feedback information.

[0281] Optionally, as an embodiment, in receiving the second WUP transmitted by the transmitting device at the second data rate, the wake-up receiver 210 is specifically configured to: receive a plurality of modulation symbols transmitted by the transmitting device, wherein the plurality of modulation symbols are obtained by the transmitting device modulating the information bits in the second WUP according to the second data rate, and the plurality of modulation symbols include a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of not 0.

[0282] Optionally, as an embodiment, the plurality of modulation symbols are sent by the transmitting end device in a manner that sends a first preset number of modulation symbols to the wake-up receiver 210 and sends a placeholder symbol to the wake-up receiver 210, wherein the placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0283] Specifically, in receiving multiple modulation symbols sent by the transmitting device, the wake-up receiver 210 is configured to: receive the multiple modulation symbols by ignoring one placeholder symbol for each first preset number of modulation symbols received.

[0284] Optionally, as an embodiment, the plurality of modulation symbols are sent by the transmitting end device in such a way that for every second preset number of the second modulation symbols sent to the wake-up receiver 210, a placeholder symbol is sent to the wake-up receiver 210. The placeholder symbol does not carry information bits and the symbol energy of the placeholder symbol is not 0.

[0285] Specifically, in receiving multiple modulation symbols sent by the transmitting device, the wake-up receiver 210 is configured to receive the multiple modulation symbols by ignoring one placeholder symbol for each second preset number of the second modulation symbols received.

[0286] Optionally, as an embodiment, the second WUP includes a signaling field and a data field arranged in the transmission sequence, the signaling field carrying indication information for indicating the second data rate; wherein, in determining the second data rate, the processor 230 is specifically configured to: determine the second data rate based on the indication information.

[0287] Optionally, as an embodiment, the second WUP also includes a redundancy field, the transmission time of which is after the transmission time of the signaling field and before the transmission time of the data field.

[0288] Optionally, as an embodiment, the second WUP includes a preamble field and a data field according to the transmission timing;

[0289] Specifically, in determining the second data rate, the processor 230 is configured to: determine the second data rate based on the preamble mode corresponding to the preamble field and a preset correspondence, wherein the preset correspondence includes the correspondence between the preamble mode and the data rate.

[0290] Optionally, as an embodiment, the second WUP includes a MAC header field, which includes an identification information field. The identification information field is used to carry the identification information of the receiving device, and the number of information bits included in the identification information field is positively correlated with the size of the second data rate.

[0291] It should be understood that the receiving device 200 according to the embodiments of the present invention may correspond to the receiving device 20 according to the embodiments of the present invention, and may correspond to the corresponding subject in the method of transmitting wake-up packets in the communication system according to the embodiments of the present invention. The above and other operations and / or functions of each module in the receiving device 200 are respectively for implementing the corresponding process in the method 100. For the sake of brevity, they will not be described in detail here.

[0292] Therefore, in the communication system according to the present invention, the receiving end device receives wake-up packets sent by the sending end device at different data transmission rates, and the sending end device can determine the appropriate data rate for sending the wake-up packet according to the specific transmission conditions during the communication process, thereby improving the transmission efficiency of the wake-up packet.

[0293] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0294] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0295] It should be understood that, in various embodiments of the present invention, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0296] Those skilled in the art will recognize that the method steps and units described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the steps and components of each embodiment have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the invention.

[0297] The methods or steps described in conjunction with the embodiments disclosed herein can be implemented in hardware, a software program executed by a processor, or a combination of both. The software program can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), registers, hard disks, removable disks, compact disc read-only memory (CD-ROM), or any other form of storage medium known in the art.

[0298] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0299] The unit described as a separate component may or may not be physically separate. The component shown as a unit may or may not be a physical unit; that is, it may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0300] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0301] Although the invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and all such modifications or substitutions should be within the scope of the invention.

Claims

1. A method for transmitting a wake-up packet, characterized in that, The method includes: The sending device generates a wake-up packet (WUP), which includes a wake-up preamble field and a data field. The wake-up preamble field is used for synchronization and to indicate the transmission rate of the data field. The preamble mode corresponding to the wake-up preamble field has a corresponding relationship with the transmission rate of the data field. The transmitting device sends the WUP, wherein the data field of the WUP is sent to the wake-up receiver of the receiving device at the transmission rate indicated by the wake-up preamble field.

2. The method according to claim 1, characterized in that, The wake-up preamble field, used to indicate the transmission rate of the data field, includes: The first wake-up preamble field indicates the first data rate, and the second wake-up preamble field indicates the second data rate.

3. The method according to claim 2, characterized in that, The lengths of the first wake-up preamble field and the second wake-up preamble field are different.

4. The method according to claim 1 or 2, characterized in that, The WUP also includes the traditional 802.11 preamble field.

5. The method according to claim 1 or 2, characterized in that, The sending end device sends WUP, including: The transmitting device simultaneously sends WUP to the wake-up receiver of the receiving device using both the first and second frequency points.

6. The method according to claim 1 or 2, characterized in that, The sending end device sends WUP, including: The transmitting device uses 13 subcarriers to send the wake-up preamble field and data field of the WUP to the wake-up receiver of the receiving device, wherein the spacing between each subcarrier is 312.5 kHz.

7. The method according to claim 1 or 2, characterized in that, The transmission rate of the data field is achieved through symbol rate or modulation coding.

8. The method according to claim 1 or 2, characterized in that, The method further includes: The transmitting device receives feedback information sent by the main transceiver of the receiving device; The sending device determines the transmission rate of the data field based on the feedback information.

9. The method according to claim 8, characterized in that, The feedback information includes information indicating the expected transmission rate of the data fields by the receiving device.

10. The method according to claim 9, characterized in that, The transmitting device receives feedback information sent by the main transceiver of the receiving device, including: The transmitting device receives a Media Access Control (MAC) frame sent by the master transceiver of the receiving device, and the MAC frame carries the feedback information.

11. The method according to claim 1 or 2, characterized in that, The sending device sends WUP, including: The transmitting device modulates the wake-up preamble field in the WUP into multiple modulation symbols, the multiple modulation symbols including a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of non-zero. The transmitting device sends the plurality of modulation symbols to the wake-up receiver of the receiving device.

12. The method according to claim 1 or 2, characterized in that, The WUP data fields include a MAC header field, which includes an identification information field that carries the identification information of the receiving device.

13. A method for transmitting a wake-up packet, characterized in that, The method includes: The receiving device's wake-up receiver receives a wake-up packet (WUP), which includes a wake-up preamble field and a data field. The wake-up preamble field is used for synchronization and to indicate the transmission rate of the data field. The receiving device's wake-up receiver receives the WUP's data field at the transmission rate indicated by the wake-up preamble field. The transmission rate is determined based on a preamble mode corresponding to the wake-up preamble field and a preset correspondence, wherein the preset correspondence includes a correspondence between the preamble mode and the transmission rate.

14. The method according to claim 13, characterized in that, The wake-up preamble field, used to indicate the transmission rate of the data field, includes: The first wake-up preamble field indicates the first data rate, and the second wake-up preamble field indicates the second data rate.

15. The method according to claim 14, characterized in that, The lengths of the first wake-up preamble field and the second wake-up preamble field are different.

16. The method according to claim 13 or 14, characterized in that, The WUP also includes the traditional 802.11 preamble field.

17. The method according to claim 13 or 14, characterized in that, The wake-up receiver of the receiving device receives WUP, including: The wake-up receiver of the receiving device simultaneously receives WUP on the first frequency point and the second frequency point.

18. The method according to claim 13 or 14, characterized in that, The wake-up receiver of the receiving device receives WUP, including: The wake-up receiver of the receiving device receives the wake-up preamble field and the data field on 13 subcarriers, wherein the spacing between each subcarrier is 312.5 kHz.

19. The method according to claim 13 or 14, characterized in that, The transmission rate of the data field is achieved through symbol rate or modulation coding.

20. The method according to claim 13 or 14, characterized in that, The method further includes: The receiving device's master transceiver sends feedback information, which is used by the sending device to determine the transmission rate of the data field.

21. The method according to claim 20, characterized in that, The feedback information includes information indicating the expected transmission rate of the data fields by the receiving device.

22. The method according to claim 21, characterized in that, The receiving device's main transceiver sends feedback information, including: The receiving device's master transceiver sends a Medium Access Control (MAC) frame, which carries the feedback information.

23. The method according to claim 13 or 14, characterized in that, The wake-up receiver of the receiving device receives WUP, including: The wake-up receiver of the receiving device receives multiple modulation symbols, which are multiple modulation symbols formed by modulating the wake-up preamble field in the WUP. The multiple modulation symbols include a first modulation symbol with a symbol energy of 0 and a second modulation symbol with a symbol energy of not 0.

24. The method according to claim 13 or 14, characterized in that, The WUP data fields include a MAC header field, which includes an identification information field that carries the identification information of the receiving device.

25. A transmitting device, characterized in that, include: A unit used to perform any one of the methods of right 1-12.

26. A receiving device, comprising a wake-up receiver and a main transceiver, characterized in that, The wake-up receiver and the main transceiver of the receiving device are used to execute any one of claims 13-24.

27. A computer-readable storage medium, characterized in that, Used to store computer programs for performing any one of the methods of rights 1-24.

28. A computer program product, characterized in that, The computer program product is used to perform any one of the methods of claims 1-24.

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