Power line carrier communication method and device

Abstract

The invention provides a power line carrier communication method and device, and the method comprises the steps: a first device sends at least two pieces of indication information, the at least two pieces of indication information are in one-to-one correspondence with at least two second devices, and the indication information corresponding to the ith second device in the at least two pieces of indication information indicates a frequency domain resource corresponding to the ith second device, the ith second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices are in one-to-one correspondence with the at least two frequency domain resources, and the at least two frequency domain resources are different from each other; and the first device communicates with the at least two second devices on the at least two frequency domain resources in an OFDMA mode. By adopting the method, the first device can respectively indicate the frequency domain resources for the at least two second devices, and perform communication on the corresponding frequency domain resources by adopting the OFDMA mode, so that the effective utilization of available channels can be realized, and the system throughput rate can be improved.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a power line carrier communication method and apparatus. Background Art

[0002] Power line communication (PLC), also known as power line network, refers to a technology that uses existing power lines to transmit analog or digital signals in a carrier mode, and is a unique communication method for power systems. The biggest feature of the power line network is that there is no need to re-erect the network, and data can be transmitted as long as there are wires.

[0003] Currently, power line carrier communication is a single-user communication method, and the central coordinator (CCO) communicates point-to-point with the station (STA). When the CCO and multiple STAs have communication requirements at the same time, it is necessary to communicate with each STA separately, and the channel needs to be competed before each transmission.

[0004] Among them, the single-user communication method has large scheduling overhead and cannot well adapt to the characteristics of the entire frequency band, resulting in a low throughput rate. Summary of the Invention

[0005] Embodiments of this application provide a power line carrier communication method and apparatus to enable the CCO to communicate with multiple STAs simultaneously.

[0006] In a first aspect, this application provides a power line carrier communication method, which includes:

[0007] A first device sends at least two indication messages, where the at least two indication messages correspond to at least two second devices one by one. The indication message corresponding to the i-th second device in the at least two indication messages indicates the frequency domain resource corresponding to the i-th second device, and the i-th second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices correspond to at least two frequency domain resources one by one, the at least two frequency domain resources are different from each other, and the frequency domain resource corresponding to the i-th second device is one of the at least two frequency domain resources; the first device and the at least two second devices communicate in an OFDMA manner on the at least two frequency domain resources.

[0008] By using the above method, the first device can respectively indicate the frequency domain resources for at least two second devices and communicate in an OFDMA manner on the corresponding frequency domain resources, which can effectively utilize the available channels and improve the system throughput rate.

[0009] In a possible design, the indication information corresponding to the i-th second device indicates the index of the frequency-domain resource corresponding to the i-th second device.

[0010] In a possible design, the frequency-domain resource corresponding to the i-th second device is one or more of N frequency-domain resources, where N is a positive integer, and the N frequency-domain resources are determined according to a predetermined resource allocation method.

[0011] In a possible design, the N frequency-domain resources are determined according to the maximum available frequency band of the PLC technology.

[0012] In a possible design, the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz; the N frequency-domain resources include frequency-domain resource 0, and the subcarrier serial number range corresponding to the frequency-domain resource 0 is 32 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 1 or frequency-domain resource 2, where the subcarrier serial number range corresponding to the frequency-domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency-domain resource 2 is 234 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 3, frequency-domain resource 4, frequency-domain resource 5, or frequency-domain resource 6, where the subcarrier serial number range corresponding to the frequency-domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency-domain resource 6 is 366 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14, where the subcarrier serial number range corresponding to the frequency-domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to the frequency-domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to the frequency-domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to the frequency-domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to the frequency-domain resource 14 is 430 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, or frequency-domain resource 30, where the subcarrier serial number range corresponding to the frequency-domain resource 15 is 32 to 51, the subcarrier serial number range corresponding to the frequency-domain resource 16 is 55 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 17 is 78 to 97, the subcarrier serial number range corresponding to the frequency-domain resource 18 is 101 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 19 is 124 to 148, the subcarrier serial number range corresponding to the frequency-domain resource 20 is 152 to 176, and the subcarrier serial number range corresponding to the frequency-domain resource 21 is 180 to 203;The sub - carrier sequence number range corresponding to the frequency - domain resource 22 is 207 - 230, the sub - carrier sequence number range corresponding to the frequency - domain resource 23 is 234 - 263, the sub - carrier sequence number range corresponding to the frequency - domain resource 24 is 267 - 296, the sub - carrier sequence number range corresponding to the frequency - domain resource 25 is 300 - 329, the sub - carrier sequence number range corresponding to the frequency - domain resource 26 is 333 - 362, the sub - carrier sequence number range corresponding to the frequency - domain resource 27 is 366 - 394, the sub - carrier sequence number range corresponding to the frequency - domain resource 28 is 398 - 426, the sub - carrier sequence number range corresponding to the frequency - domain resource 29 is 430 - 458, and the sub - carrier sequence number range corresponding to the frequency - domain resource 30 is 462 - 490.

[0013] By using the above resource allocation method, appropriate frequency - domain resources can be flexibly configured for the second device, effectively utilizing the available channels and improving the system throughput.

[0014] In a possible design, the at least two frequency - domain resources are also determined according to the number of the at least two second devices.

[0015] In a possible design, the frequency - domain resource corresponding to the i - th second device and the frequency - domain resource corresponding to the j - th second device do not include the same sub - carriers, where the j - th second device is another one of the at least two second devices, and j is a positive integer.

[0016] In a second aspect, the present application provides a power - line carrier communication method. The method includes: the i - th second device receives the indication information corresponding to the i - th second device from the first device, and the indication information corresponding to the i - th second device indicates the frequency - domain resource corresponding to the i - th second device; the i - th second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices and the at least two frequency - domain resources are in one - to - one correspondence, the at least two frequency - domain resources are different from each other, and the frequency - domain resource corresponding to the i - th second device is one of the at least two frequency - domain resources; and communicate with the first device on the frequency - domain resource corresponding to the i - th second device.

[0017] By using the above method, multiple second devices can communicate with the first device simultaneously, effectively utilizing the available channels and improving the system throughput.

[0018] In a possible design, the indication information corresponding to the i - th second device indicates the index of the frequency - domain resource corresponding to the i - th second device.

[0019] In a possible design, the frequency - domain resource corresponding to the i - th second device is one or more of N frequency - domain resources, N is a positive integer, and the N frequency - domain resources are determined according to a predetermined resource allocation method.

[0020] In a possible design, the N frequency-domain resources are determined according to the maximum available frequency band of the PLC technology.

[0021] In a possible design, the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz; the N frequency-domain resources include frequency-domain resource 0, and the subcarrier sequence number range corresponding to the frequency-domain resource 0 is 32 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 1 or frequency-domain resource 2, where the subcarrier sequence number range corresponding to the frequency-domain resource 1 is 32 to 230, and the subcarrier sequence number range corresponding to the frequency-domain resource 2 is 234 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 3, frequency-domain resource 4, frequency-domain resource 5, or frequency-domain resource 6, where the subcarrier sequence number range corresponding to the frequency-domain resource 3 is 32 to 120, the subcarrier sequence number range corresponding to the frequency-domain resource 4 is 124 to 230, the subcarrier sequence number range corresponding to the frequency-domain resource 5 is 234 to 362, and the subcarrier sequence number range corresponding to the frequency-domain resource 6 is 366 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14, where the subcarrier sequence number range corresponding to the frequency-domain resource 7 is 32 to 74, the subcarrier sequence number range corresponding to the frequency-domain resource 8 is 78 to 120, the subcarrier sequence number range corresponding to the frequency-domain resource 9 is 124 to 176, the subcarrier sequence number range corresponding to the frequency-domain resource 10 is 180 to 230, the subcarrier sequence number range corresponding to the frequency-domain resource 11 is 234 to 296, the subcarrier sequence number range corresponding to the frequency-domain resource 12 is 300 to 362, the subcarrier sequence number range corresponding to the frequency-domain resource 13 is 366 to 426, and the subcarrier sequence number range corresponding to the frequency-domain resource 14 is 430 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, or frequency-domain resource 30, where the subcarrier sequence number range corresponding to the frequency-domain resource 15 is 32 to 51, the subcarrier sequence number range corresponding to the frequency-domain resource 16 is 55 to 74, the subcarrier sequence number range corresponding to the frequency-domain resource 17 is 78 to 97, the subcarrier sequence number range corresponding to the frequency-domain resource 18 is 101 to 120, the subcarrier sequence number range corresponding to the frequency-domain resource 19 is 124 to 148, the subcarrier sequence number range corresponding to the frequency-domain resource 20 is 152 to 176, and the subcarrier sequence number range corresponding to the frequency-domain resource 21 is 180 to 203;The sub - carrier serial number range corresponding to the frequency - domain resource 22 is 207 - 230, the sub - carrier serial number range corresponding to the frequency - domain resource 23 is 234 - 263, the sub - carrier serial number range corresponding to the frequency - domain resource 24 is 267 - 296, the sub - carrier serial number range corresponding to the frequency - domain resource 25 is 300 - 329, the sub - carrier serial number range corresponding to the frequency - domain resource 26 is 333 - 362, the sub - carrier serial number range corresponding to the frequency - domain resource 27 is 366 - 394, the sub - carrier serial number range corresponding to the frequency - domain resource 28 is 398 - 426, the sub - carrier serial number range corresponding to the frequency - domain resource 29 is 430 - 458, and the sub - carrier serial number range corresponding to the frequency - domain resource 30 is 462 - 490.

[0022] In a possible design, the at least two frequency - domain resources are also determined according to the number of the at least two second devices.

[0023] In a possible design, the frequency - domain resource corresponding to the i - th second device and the frequency - domain resource corresponding to the j - th second device do not include the same sub - carriers, where the j - th second device is another one of the at least two second devices, and j is a positive integer.

[0024] In a third aspect, the present application provides a power - line carrier communication device, and the device includes: a transceiver unit and a processing unit;

[0025] The transceiver unit is used for receiving and transmitting information; the processing unit is used for sending, through the transceiver unit, at least two indication messages, where the at least two indication messages correspond one - to - one with at least two second devices. The indication message corresponding to the i - th second device in the at least two indication messages indicates the frequency - domain resource corresponding to the i - th second device, where the i - th second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices correspond one - to - one with at least two frequency - domain resources, the at least two frequency - domain resources are different from each other, and the frequency - domain resource corresponding to the i - th second device is one of the at least two frequency - domain resources; and communicate with the at least two second devices in the at least two frequency - domain resources by using the OFDMA method.

[0026] In a possible design, the indication message corresponding to the i - th second device indicates the index of the frequency - domain resource corresponding to the i - th second device.

[0027] In a possible design, the frequency - domain resource corresponding to the i - th second device is one or more of N frequency - domain resources, N is a positive integer, and the N frequency - domain resources are determined according to a predetermined resource allocation method.

[0028] In a possible design, the N frequency - domain resources are determined according to the maximum available frequency band of the PLC technology.

[0029] In a possible design, the maximum available frequency band of the power line carrier communication (PLC) technology is 0.7 MHz to 12 MHz; the N frequency domain resources include frequency domain resource 0, and the subcarrier serial number range corresponding to the frequency domain resource 0 is 32 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 1 or frequency domain resource 2, where the subcarrier serial number range corresponding to the frequency domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency domain resource 2 is 234 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 3, frequency domain resource 4, frequency domain resource 5 or frequency domain resource 6, where the subcarrier serial number range corresponding to the frequency domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency domain resource 6 is 366 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 7, frequency domain resource 8, frequency domain resource 9, frequency domain resource 10, frequency domain resource 11, frequency domain resource 12, frequency domain resource 13 or frequency domain resource 14, where the subcarrier serial number range corresponding to the frequency domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to the frequency domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to the frequency domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to the frequency domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to the frequency domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to the frequency domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to the frequency domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to the frequency domain resource 14 is 430 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 15, frequency domain resource 16, frequency domain resource 17, frequency domain resource 18, frequency domain resource 19, frequency domain resource 20, frequency domain resource 21, frequency domain resource 22, frequency domain resource 23, frequency domain resource 24, frequency domain resource 25, frequency domain resource 26, frequency domain resource 27, frequency domain resource 28, frequency domain resource 29, frequency domain resource 30, where the subcarrier serial number range corresponding to the frequency domain resource 15 is 32 to 51, the subcarrier serial number range corresponding to the frequency domain resource 16 is 55 to 74, the subcarrier serial number range corresponding to the frequency domain resource 17 is 78 to 97, the subcarrier serial number range corresponding to the frequency domain resource 18 is 101 to 120, the subcarrier serial number range corresponding to the frequency domain resource 19 is 124 to 148, the subcarrier serial number range corresponding to the frequency domain resource 20 is 152 to 176, and the subcarrier serial number range corresponding to the frequency domain resource 21 is 180 to 203;The sub - carrier serial number range corresponding to the frequency - domain resource 22 is 207 - 230, the sub - carrier serial number range corresponding to the frequency - domain resource 23 is 234 - 263, the sub - carrier serial number range corresponding to the frequency - domain resource 24 is 267 - 296, the sub - carrier serial number range corresponding to the frequency - domain resource 25 is 300 - 329, the sub - carrier serial number range corresponding to the frequency - domain resource 26 is 333 - 362, the sub - carrier serial number range corresponding to the frequency - domain resource 27 is 366 - 394, the sub - carrier serial number range corresponding to the frequency - domain resource 28 is 398 - 426, the sub - carrier serial number range corresponding to the frequency - domain resource 29 is 430 - 458, and the sub - carrier serial number range corresponding to the frequency - domain resource 30 is 462 - 490.

[0030] In a possible design, the at least two frequency - domain resources are also determined according to the number of the at least two second devices.

[0031] In a possible design, the frequency - domain resource corresponding to the i - th second device and the frequency - domain resource corresponding to the j - th second device do not include the same sub - carriers, where the j - th second device is another one of the at least two second devices, and j is a positive integer.

[0032] In a fourth aspect, the present application provides a power - line carrier communication device, which includes a transceiver unit and a processing unit. The transceiver unit is used for receiving and transmitting information; the processing unit is used for receiving, through the transceiver unit, the indication information corresponding to the i - th second device from a first device, where the indication information corresponding to the i - th second device indicates the frequency - domain resource corresponding to the i - th second device; the i - th second device is any one of at least two second devices, and i is a positive integer; the at least two second devices and the at least two frequency - domain resources are in one - to - one correspondence, the at least two frequency - domain resources are different from each other, and the frequency - domain resource corresponding to the i - th second device is one of the at least two frequency - domain resources; communicate with the first device on the frequency - domain resource corresponding to the i - th second device.

[0033] In a possible design, the indication information corresponding to the i - th second device indicates the index of the frequency - domain resource corresponding to the i - th second device.

[0034] In a possible design, the frequency - domain resource corresponding to the i - th second device is one or more of N frequency - domain resources, N is a positive integer, and the N frequency - domain resources are determined according to a predetermined resource allocation method.

[0035] In a possible design, the N frequency - domain resources are determined according to the maximum available frequency band of the PLC technology.

[0036] In a possible design, the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz; the N frequency-domain resources include frequency-domain resource 0, and the subcarrier serial number range corresponding to the frequency-domain resource 0 is 32 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 1 or frequency-domain resource 2, where the subcarrier serial number range corresponding to the frequency-domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency-domain resource 2 is 234 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 3, frequency-domain resource 4, frequency-domain resource 5, or frequency-domain resource 6, where the subcarrier serial number range corresponding to the frequency-domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency-domain resource 6 is 366 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14, where the subcarrier serial number range corresponding to the frequency-domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to the frequency-domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to the frequency-domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to the frequency-domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to the frequency-domain resource 14 is 430 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, or frequency-domain resource 30, where the subcarrier serial number range corresponding to the frequency-domain resource 15 is 32 to 51, the subcarrier serial number range corresponding to the frequency-domain resource 16 is 55 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 17 is 78 to 97, the subcarrier serial number range corresponding to the frequency-domain resource 18 is 101 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 19 is 124 to 148, the subcarrier serial number range corresponding to the frequency-domain resource 20 is 152 to 176, and the subcarrier serial number range corresponding to the frequency-domain resource 21 is 180 to 203;The sub - carrier serial number range corresponding to the frequency - domain resource 22 is 207 - 230, the sub - carrier serial number range corresponding to the frequency - domain resource 23 is 234 - 263, the sub - carrier serial number range corresponding to the frequency - domain resource 24 is 267 - 296, the sub - carrier serial number range corresponding to the frequency - domain resource 25 is 300 - 329, the sub - carrier serial number range corresponding to the frequency - domain resource 26 is 333 - 362, the sub - carrier serial number range corresponding to the frequency - domain resource 27 is 366 - 394, the sub - carrier serial number range corresponding to the frequency - domain resource 28 is 398 - 426, the sub - carrier serial number range corresponding to the frequency - domain resource 29 is 430 - 458, and the sub - carrier serial number range corresponding to the frequency - domain resource 30 is 462 - 490.

[0037] In a possible design, the at least two frequency - domain resources are also determined according to the number of the at least two second devices.

[0038] In a possible design, the frequency - domain resource corresponding to the i - th second device and the frequency - domain resource corresponding to the j - th second device do not include the same sub - carriers, where the j - th second device is another one of the at least two second devices, and j is a positive integer.

[0039] In a fifth aspect, the present application provides a communication device, which can be the first device, or a module or unit (e.g., a chip, or a chip system, or a circuit) corresponding one - by - one to the method / operation / step / action described in any one of the first to third aspects in the first device, or can be used in matching with the first device.

[0040] In a sixth aspect, the present application provides a communication device, including at least one processing element and at least one storage element, where the at least one storage element is used to store programs and data, and the at least one processing element is used to read and execute the programs and data stored in the storage element, so that the method described in any one of the above - mentioned aspects of the present application can be implemented.

[0041] In a seventh aspect, the present application further provides a computer program, which, when running on a computer, enables the computer to execute the method described in any one of the above - mentioned aspects.

[0042] In an eighth aspect, the present application provides a communication device, which includes: an interface circuit and at least one processor; the interface circuit is used to provide input and / or output of programs or instructions for the at least one processor; the at least one processor is used to execute the programs or instructions so that the communication device can implement the method described in any one of the above - mentioned aspects.

[0043] In one possible way, the communication device includes the at least one memory for storing the program or instructions.

[0044] In a ninth aspect, the present application provides a computer storage medium storing a software program which, when read and executed by one or more processors, can implement the method described in any one of the above aspects.

[0045] In a tenth aspect, the present application provides a computer program product containing instructions which, when run on a computer, cause the computer to execute the method described in any one of the above aspects.

[0046] In an eleventh aspect, the present application provides a chip system including at least one chip and a memory, where the at least one chip is configured to read and execute the program stored in the memory to implement the method described in any one of the above aspects.

[0047] In a twelfth aspect, the present application provides a communication system including at least two second devices and a first device, where the first device is configured to execute the method described in any one of the first aspect, and the second device is configured to execute the method described in any one of the second aspect.

[0048] Based on the implementations provided in the above aspects of the present application, further combinations can be made to provide more implementations. Description of the Drawings

[0049] To more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings required to be used in the embodiments of the present application or the background art will be described below.

[0050] Figure 1 Shows a schematic diagram of the energy change in the power line channel environment;

[0051] Figure 2 Shows a schematic diagram of the three main frequency bands of the power line channel;

[0052] Figure 3 Shows a schematic diagram of a possible communication scenario in the present application;

[0053] Figure 4 Shows an overview flowchart of a power line carrier communication method in the present application;

[0054] Figure 5 Shows a schematic diagram of N frequency domain resources in the present application;

[0055] Figure 6 Shows a flowchart of the communication between the first device and M second devices in the present application;

[0056] Figure 7A Shows one of the possible resource allocation diagrams in the present application;

[0057] Figure 7B Shows another possible resource allocation diagram in the present application;

[0058] Figure 7C Shows a third possible resource allocation diagram in the present application;

[0059] Figure 7D Shows a fourth possible resource allocation diagram in the present application;

[0060] Figure 8 Shows the frame structure diagram of a downlink data frame in the present application;

[0061] Figure 9 Shows the structural diagram of a communication device in the present application;

[0062] Figure 10 Shows the structural diagram of another communication device in the present application. Detailed implementation manners

[0063] In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single item (s) or plural items (s). For example, at least one (item) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where each of a, b, and c itself can be an element or a set containing one or more elements.

[0064] In the present application, "exemplary", "in some embodiments", "in other embodiments", etc. are used to give examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of the word "exemplary" aims to present concepts in a specific manner.

[0065] In this application, the words "of", "corresponding", and "corresponding to" can sometimes be used interchangeably. It should be noted that when the differences are not emphasized, they convey the same meaning. In the embodiments of this application, communication and transmission can sometimes be used interchangeably. It should be noted that when the differences are not emphasized, they convey the same meaning. For example, transmission can include sending and / or receiving, and can be a noun or a verb.

[0066] It should be noted that the terms "first", "second", etc. involved in the embodiments of this application are only used for the purpose of distinguishing descriptions, and should not be construed as indicating or implying relative importance, nor as indicating or implying an order.

[0067] The specific implementation manners of this application will be described by way of example with reference to the accompanying drawings in the embodiments of this application. However, the implementation manners of this application can also include combining these embodiments without departing from the spirit or scope of this application, such as using other embodiments and making structural changes. Therefore, the detailed descriptions of the following embodiments should not be understood in a limiting sense. The terms used in the embodiment part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application.

[0068] Some international standards related to power line high-speed carrier communication technology have adopted orthogonal frequency-division multiplexing (OFDM) modulation technology, which can ensure reliable data transmission in an environment with severe multipath and electromagnetic interference.

[0069] Since power lines were not originally used as a medium for data communication, the power line noise, load, and impedance in the power line environment are constantly changing, resulting in the characteristics of time-varying, frequency-selective, and strong interference in the transmission channel. Through actual measurement, it is found that there is strong interference in certain frequency bands in the power line channel environment, and the channel shows deep fading, etc. As Figure 1 shown, the abscissa is frequency and the ordinate is energy. The channel has a deeper fade near 2.5 MHz and 10 MHz. It can be understood that Figure 1 this is only an example and does not limit this application. Exemplarily, when the CCO communicates with different STAs, the frequency bands with deep fading may be different. For example, when STA1 communicates with the CCO, the channel has a deeper fade near 2.5 MHz and 10 MHz, and when STA2 communicates with the CCO, the channel has a deeper fade near 6 MHz.

[0070] To ensure the stability of communication, the prior art has defined three main frequency bands, namely 0.7 MHz to 3 MHz, 2.5 MHz to 5.7 MHz, and 2.5 MHz to 12 MHz, as Figure 2 shown.

[0071] For example, in combination with Figure 1 , when STA1 communicates with the CCO, there are relatively deep fades near 2.5 MHz and 10 MHz in the channel. If the full frequency band of 2.5 MHz to 12 MHz is used, the frequency bands with deep fades will affect signal reception and may cause signal reception failure. Therefore, the CCO will choose to communicate with STA1 in the frequency band of 2.5 MHz to 5.7 MHz, resulting in a significant narrowing of the available frequency band and an inability to make good use of the full frequency band, greatly reducing the throughput. In addition, when the CCO communicates with the STA, it will also bring overhead such as frame intervals and frame preambles, resulting in a relatively large time-domain overhead.

[0072] As Figure 3 shown is a schematic diagram of a possible application scenario of this application. It can be understood that Figure 3 the number of CCOs and STAs shown therein is only an example, and there may be more or fewer. Among them, the STA associated with the CCO can receive the frames sent by the CCO and can also send frames to the CCO. The embodiments of this application will be described by taking the communication between the CCO and the STA as an example.

[0073] Based on the above, this application provides a power line carrier communication method to enable the CCO to communicate with multiple STAs simultaneously. Exemplarily, the first device in this application can be a CCO or a chip inside the CCO, and the second device can be an STA or a chip inside the STA. It should be noted that in this application, unless otherwise specified, the frequency band and the frequency range can be used interchangeably. As Figure 4 shown, the method includes:

[0074] Step 400: The first device sends at least two indication messages, and the at least two indication messages correspond to at least two second devices one by one.

[0075] In a possible implementation, each of the at least two second devices can receive the at least two indication messages and determine the indication message corresponding to itself from the at least two indication messages. For example, it can determine the indication message corresponding to itself from the at least two indication messages according to its own identifier.

[0076] Exemplarily, in a downlink communication scenario, at least two pieces of indication information can be carried by a frame control (FC) field in a downlink data frame. In an uplink communication scenario, at least two pieces of indication information can be carried by the FC field in a trigger frame. Herein, the FC field can be an existing field or a newly added field, and the present application does not limit this.

[0077] The following only takes the i-th second device as an example for illustration. The i-th second device is any one of at least two second devices, and i is a positive integer. The indication information corresponding to the i-th second device among at least two pieces of indication information indicates the frequency domain resource corresponding to the i-th second device. At least two second devices and at least two frequency domain resources are in one-to-one correspondence, and the at least two frequency domain resources are different from each other. The frequency domain resource corresponding to the i-th second device is one of the at least two frequency domain resources.

[0078] In a possible implementation manner, that the at least two frequency domain resources are different from each other can be understood as that the at least two frequency domain resources do not overlap, or there are no identical frequency domain units in the at least two frequency domain resources, such as subcarriers.

[0079] Exemplarily, the frequency domain resource corresponding to the i-th second device and the frequency domain resource corresponding to the j-th second device do not include the same subcarriers. The j-th second device is another one of at least two second devices, j is a positive integer, and the i-th second device and the j-th second device are two different second devices. That is, the frequency domain resource corresponding to the i-th second device and the frequency domain resource corresponding to the j-th second device do not overlap. It can be understood that the frequency domain resources respectively corresponding to any two of the at least two second devices do not overlap.

[0080] Step 410: The first device communicates with at least two second devices in at least two frequency domain resources by using orthogonal frequency division multiple access (OFDMA).

[0081] Exemplarily, the first device communicates with each of the at least two second devices in the corresponding frequency domain resource. It can be understood that the present application does not limit the communication between the first device and the at least two second devices to be uplink communication or downlink communication. That is, the first device can send downlink data to some or all of the second devices, or some or all of the second devices can send uplink data to the first device.

[0082] In one example, in a downlink communication scenario, the first device sends a downlink data frame. The downlink data frame carries at least two pieces of indication information and also carries downlink data corresponding to at least two devices respectively. That is, the first device sends the corresponding downlink data on the frequency-domain resources corresponding to each of the at least two second devices. Among them, the first device sends the downlink data corresponding to the i-th second device on the frequency-domain resources corresponding to the i-th second device.

[0083] In another example, in an uplink communication scenario, the first device sends a trigger frame. The trigger frame carries at least two pieces of indication information, and each of the at least two second devices sends the corresponding uplink data on the corresponding frequency-domain resources. Among them, the i-th second device sends the uplink data corresponding to the i-th second device on the frequency-domain resources corresponding to the i-th second device.

[0084] Taking the indication information corresponding to the i-th second device as an example, different implementation manners of the indication information are described as follows:

[0085] Possible implementation manner 1: The indication information corresponding to the i-th second device indicates the index of the frequency-domain resources corresponding to the i-th second device.

[0086] Among them, the frequency-domain resources corresponding to the i-th second device are one or more of N frequency-domain resources, and N is a positive integer.

[0087] Exemplarily, the indication information corresponding to the i-th second device may indicate one or more of the N frequency-domain resources as the frequency-domain resources corresponding to the i-th second device. Similarly, the indication information corresponding to the j-th second device may indicate one or more of the N frequency-domain resources as the frequency-domain resources corresponding to the j-th second device. The frequency-domain resources corresponding to the i-th second device do not overlap with the frequency-domain resources corresponding to the j-th second device, which will not be elaborated here.

[0088] Exemplarily, the N frequency-domain resources are determined according to a predetermined resource allocation manner. The present application does not limit the specific determination manner of the N frequency-domain resources. Among them, the N frequency-domain resources are in one-to-one correspondence with N indexes.

[0089] Exemplarily, the N frequency-domain resources can be determined according to the maximum available frequency band of the PLC technology. For example, the maximum available frequency band of the PLC technology can be 0.7 MHz to 12 MHz. It can also be understood that the frequency band of the frequency-domain resource with the largest frequency band among the N frequency-domain resources is less than or equal to the maximum available frequency band of the PLC technology. Or it can be described as that the subcarrier serial number range of the frequency-domain resource with the largest subcarrier serial number range among the N frequency-domain resources is less than or equal to the first subcarrier serial number range, and the first subcarrier serial number range is determined according to the maximum available frequency band of the PLC technology. For example, if the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz, the corresponding subcarrier serial number range is 32 to 490.

[0090] Exemplarily, the guard interval between any two adjacent frequency-domain resources among the N frequency-domain resources can be 2 subcarriers, or 3 carriers, or 4 subcarriers, or 5 subcarriers. In addition, the number of subcarriers included in the guard interval can also take other values, and this application does not limit this.

[0091] Exemplarily, the value of N is 31 or 15 or 7. In addition, the value of N can also take other numerical values, and this application does not limit this.

[0092] It should be noted that this application does not limit the number of subcarriers included in the guard interval, the value of N, and the start position and end position of each frequency-domain resource. The following only takes Figure 5 as an example to introduce a possible resource allocation method. It can be understood that as Figure 5 shown is only a possible resource allocation method and does not serve as a limitation of this application.

[0093] Among them, in Figure 5 , the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz, the guard interval is 3 subcarriers, and the subcarrier serial number is the serial number corresponding to a subcarrier interval of 24.414 KHz. The index of the following frequency-domain resources starts from 0, only for example, it can also start from 1, or the index of the frequency-domain resources can also be other values, which are not limited here.

[0094] Among them, the OFDM subcarrier interval is the frequency band width / the number of points of the fast Fourier transform (FFT). If the number of FFT points is 1024 and the baseband frequency band is -12.5 MHz to 12.5 HzM, then the subcarrier interval is 12.5 / 512 MHz = 24.414 KHz, and the subcarrier corresponding to the serial number k has a frequency of k * 12.5 / 512 MHz, where k is a positive integer.

[0095] Exemplarily, the N frequency-domain resources include frequency-domain resource 0, and the subcarrier serial number range corresponding to frequency-domain resource 0 is 32 to 490. That is, the coverage range or the corresponding frequency band of frequency-domain resource 0 is 0.7 MHz to 12 MHz. Frequency-domain resource 0 can be allocated to 1 second device.

[0096] And / or, the N frequency-domain resources include at least one of frequency-domain resource 1 and frequency-domain resource 2. Among them, the subcarrier serial number range corresponding to frequency-domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to frequency-domain resource 2 is 234 to 490. That is, the maximum available frequency band of the PLC technology is divided into two parts: a high-frequency band and a low-frequency band. Among them, frequency-domain resource 1 corresponds to the low-frequency band, the coverage range or the corresponding frequency band of frequency-domain resource 1 is 0.7 MHz to 5.7 MHz, and the corresponding subcarrier serial number range is 32 to 230. Frequency-domain resource 2 corresponds to the high-frequency band, the coverage range or the corresponding frequency band of frequency-domain resource 1 is 5.7 MHz to 12 MHz, and the corresponding subcarrier serial number range is 234 to 490. Frequency-domain resource 1 and frequency-domain resource 2 can be allocated to at most 2 second devices.

[0097] And / or, the N frequency-domain resources include at least one of frequency-domain resource 3, frequency-domain resource 4, frequency-domain resource 5, and frequency-domain resource 6. Among them, the subcarrier serial number range corresponding to frequency-domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to frequency-domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to frequency-domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to frequency-domain resource 6 is 366 to 490. That is, the maximum available frequency band of the PLC technology is divided into 4 parts. The sum of the coverage ranges of frequency-domain resource 3 and frequency-domain resource 4 is the same as the coverage range of frequency-domain resource 1. Among them, the coverage range of frequency-domain resource 3 is 0.7 MHz to 3 MHz, and the corresponding subcarrier serial number range is 32 to 120. The coverage range of frequency-domain resource 4 is 3 MHz to 5.7 MHz, and the corresponding subcarrier serial number range is 124 to 230. The sum of the coverage ranges of frequency-domain resource 5 and frequency-domain resource 6 is the same as the coverage range of frequency-domain resource 3. The coverage range of frequency-domain resource 5 is 5.7 MHz to 8.8 MHz, and the corresponding subcarrier serial number range is 234 to 362. The coverage range of frequency-domain resource 4 is 8.8 MHz to 12 MHz, and the corresponding subcarrier serial number range is 366 to 490. Frequency-domain resources 3 to 6 can be allocated to at most 4 second devices.

[0098] Alternatively, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14. Among them, the subcarrier serial number range corresponding to frequency-domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to frequency-domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to frequency-domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to frequency-domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to frequency-domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to frequency-domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to frequency-domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to frequency-domain resource 14 is 430 to 490. That is to say, the maximum available frequency band of the PLC technology is divided into 8 parts. The sum of the coverage ranges of frequency-domain resource 7 and frequency-domain resource 8 is the same as the coverage range of frequency-domain resource 3. The sum of the coverage ranges of frequency-domain resource 9 and frequency-domain resource 10 is the same as the coverage range of frequency-domain resource 4. The sum of the coverage ranges of frequency-domain resource 11 and frequency-domain resource 12 is the same as the coverage range of frequency-domain resource 5. The sum of the coverage ranges of frequency-domain resource 13 and frequency-domain resource 14 is the same as the coverage range of frequency-domain resource 6. Frequency-domain resources 7 to 14 can be allocated to at most 8 second devices.

[0099] Alternatively, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, and frequency-domain resource 30. Among them, the subcarrier sequence number range corresponding to frequency-domain resource 15 is 32 to 51, the subcarrier sequence number range corresponding to frequency-domain resource 16 is 55 to 74, the subcarrier sequence number range corresponding to frequency-domain resource 17 is 78 to 97, the subcarrier sequence number range corresponding to frequency-domain resource 18 is 101 to 120, the subcarrier sequence number range corresponding to frequency-domain resource 19 is 124 to 148, the subcarrier sequence number range corresponding to frequency-domain resource 20 is 152 to 176, and the subcarrier sequence number range corresponding to frequency-domain resource 21 is 180 to 203; the subcarrier sequence number range corresponding to frequency-domain resource 22 is 207 to 230, the subcarrier sequence number range corresponding to frequency-domain resource 23 is 234 to 263, the subcarrier sequence number range corresponding to frequency-domain resource 24 is 267 to 296, the subcarrier sequence number range corresponding to frequency-domain resource 25 is 300 to 329, the subcarrier sequence number range corresponding to frequency-domain resource 26 is 333 to 362, the subcarrier sequence number range corresponding to frequency-domain resource 27 is 366 to 394, the subcarrier sequence number range corresponding to frequency-domain resource 28 is 398 to 426, the subcarrier sequence number range corresponding to frequency-domain resource 29 is 430 to 458, and the subcarrier sequence number range corresponding to frequency-domain resource 30 is 462 to 490. That is to say, the maximum available frequency band of the PLC technology is divided into 16 parts. The sum of the coverage ranges of frequency-domain resource 15 and frequency-domain resource 16 is the same as the coverage range of frequency-domain resource 7, the sum of the coverage ranges of frequency-domain resource 17 and frequency-domain resource 18 is the same as the coverage range of frequency-domain resource 8, the sum of the coverage ranges of frequency-domain resource 19 and frequency-domain resource 20 is the same as the coverage range of frequency-domain resource 9, the sum of the coverage ranges of frequency-domain resource 21 and frequency-domain resource 22 is the same as the coverage range of frequency-domain resource 10, the sum of the coverage ranges of frequency-domain resource 23 and frequency-domain resource 24 is the same as the coverage range of frequency-domain resource 11, the sum of the coverage ranges of frequency-domain resource 25 and frequency-domain resource 26 is the same as the coverage range of frequency-domain resource 12, the sum of the coverage ranges of frequency-domain resource 27 and frequency-domain resource 28 is the same as the coverage range of frequency-domain resource 13, and the sum of the coverage ranges of frequency-domain resource 29 and frequency-domain resource 30 is the same as the coverage range of frequency-domain resource 14. Frequency-domain resources 15 to 30 can be allocated to at most 16 second devices.

[0100] Exemplarily, the above introduces frequency-domain resources 0 to frequency-domain resource 30, that is, a total of 31 frequency-domain resources. It can be understood that in this application, the N frequency-domain resources may include some or all of the above 31 frequency-domain resources. This application does not limit which of the above 31 frequency-domain resources the N frequency-domain resources specifically include.

[0101] It can be understood that the correspondence between N frequency-domain resources and their indexes can be pre-configured for each second device through signaling, or saved in the second device in a manner defined by the protocol. That is, each of at least two second devices can query the correspondence between N frequency-domain resources and their indexes according to the received indication information, determine the frequency-domain resources corresponding to the indexes included in the indication information, and then communicate with the first device on the corresponding frequency-domain resources.

[0102] In addition, it should be noted that 802.11ax can allocate RUs to each user by specifying the RUs in the index table. However, this index table can only be applied to Wifi technology and cannot adapt to the PLC channel. Therefore, it has a different application scenario from the correspondence between N frequency-domain resources and their indexes involved in this application.

[0103] Among them, how the first device specifically allocates frequency-domain resources to the second device can refer to the relevant descriptions Figure 6 shown below and will not be elaborated here.

[0104] Possible implementation method 2: The indication information corresponding to the i-th second device indicates the position of the frequency-domain resources corresponding to the i-th second device.

[0105] For example, the indication information corresponding to the i-th second device indicates the start position and end position of the frequency-domain resources corresponding to the i-th second device. Or, the indication information corresponding to the i-th second device indicates the start position and frequency-domain interval of the frequency-domain resources corresponding to the i-th second device. Or, the indication information corresponding to the i-th second device indicates the frequency-domain interval and end position of the frequency-domain resources corresponding to the i-th second device. In addition, if the frequency-domain interval is pre-configured or defined by the protocol, the indication information corresponding to the i-th second device indicates the start position or end position of the frequency-domain resources corresponding to the i-th second device.

[0106] In an example, the above start position can be understood as the start subcarrier number, the frequency-domain interval is the number of subcarriers, and the end position is the end subcarrier number. For example, the indication information corresponding to the i-th second device indicates that the start subcarrier number of the frequency-domain resources corresponding to the i-th second device is 55 and the end subcarrier number is 110. Or, the indication information corresponding to the i-th second device indicates that the start subcarrier number of the frequency-domain resources corresponding to the i-th second device is 55 and the number of subcarriers is 60.

[0107] In another example, the above starting position can be understood as the starting frequency point, the frequency domain interval is the bandwidth size, and the ending position is the ending frequency point. For example, the indication information corresponding to the i-th second device indicates that the starting frequency point of the frequency domain resource corresponding to the i-th second device is 6 MHz, and the ending frequency point is 8 MHz. Or, the indication information corresponding to the i-th second device indicates that the starting frequency point of the frequency domain resource corresponding to the i-th second device is 6 MHz, and the bandwidth size is 2 MHz.

[0108] Among them, how the first device specifically allocates the frequency domain resources to the second device can be referred to the following Figure 6 , and Figures 7A to 7D the relevant descriptions thereof will not be elaborated here.

[0109] It can be understood that the indication manner of the above indication information is only an example and not a limitation of this application. The above content is not only applicable to the scenario where the first device communicates with multiple second devices, but also can be applied to the scenario where the first device communicates with one second device.

[0110] Figure 6 The illustrated embodiment is a further illustration of the Figure 4 illustrated embodiment. The communication process between the first device and the M second devices is as follows:

[0111] S600: The first device receives M data frames.

[0112] The M data frames come from M second devices. The M data frames correspond to the M second devices one by one, and M is a positive integer. Among them, the i-th data frame indicates the channel characteristics between the first device and the i-th second device. The i-th data frame is any one of the M data frames, the i-th second device is one of the M second devices, i is a positive integer, and i ≤ M.

[0113] Exemplarily, the channel characteristics between the first device and the i-th second device may specifically include parameters such as signal-to-noise ratio.

[0114] S610: The first device sends M indication information. The M indication information corresponds to the M second devices one by one.

[0115] Exemplarily, the first device sends M indication information.

[0116] For example, the first device may send a downlink data frame, and carry the M indication information in the frame control field of the downlink data frame.

[0117] For another example, the first device may send a trigger frame, and carry the M indication information in the frame control field of the trigger frame.

[0118] The following uses only the i-th second device as an example for illustration. The i-th second device is any one of the M second devices, and i is a positive integer. The indication information corresponding to the i-th second device indicates the frequency domain resource corresponding to the i-th second device. The M second devices correspond one-to-one with M frequency domain resources, the M frequency domain resources are different from each other, and the frequency domain resource corresponding to the i-th second device is one of the M frequency domain resources.

[0119] Taking the frequency domain resource corresponding to the i-th second device as an example, in a possible implementation, the first device may determine the frequency band Y according to the channel characteristics between the first device and the i-th second device, where the channel quality between the first device and the i-th second device on the frequency bands other than the frequency band Y is better than the channel quality between the first device and the i-th second device on the frequency band Y. Or, the number of bits carried per unit frequency band on the frequency bands other than the frequency band Y is greater than the number of bits carried per unit frequency band on the frequency band Y. Or, the channel interference on the frequency bands other than the frequency band Y is less than the channel interference on the frequency band Y.

[0120] Or it can be understood that the first device may determine the frequency band with strong interference or deep fading according to the channel characteristics between the first device and the i-th second device, denoted as the frequency band Y. The frequency band with strong interference can be understood as that there is communication between other devices other than the first device and the second device on this frequency band, and it causes damage to the signal received by the first device from the second device and / or the signal received by the second device from the first device, which may lead to signal reception failure. The frequency band with deep fading can be understood as that the channel between the first device and the second device is affected by multipath, and the energy fading is obvious on this frequency band, resulting in a decrease in the communication signal-to-noise ratio and low communication efficiency.

[0121] Further, the first device may determine the frequency domain resource corresponding to the i-th second device according to the frequency band Y. The frequency domain resource corresponding to the i-th second device corresponds to the frequency band X, and the frequency band X does not include the frequency band Y.

[0122] It should be noted that the number of frequency bands Y may be one or more, and this application does not limit this. The number of frequency bands X may be continuous or discontinuous, and this application does not limit this.

[0123] For example, the frequency band Y is 2.5 MHz to 3 MHz, and the frequency band X may be 4 MHz to 6 MHz, or the frequency band X may be 4 MHz to 6 MHz, and 9 MHz to 12 MHz.

[0124] For another example, the frequency band Y is 2.5 MHz to 3 MHz and 10 MHz to 11 MHz, and the frequency band X may be 4 MHz to 6 MHz, or the frequency band X may be 4 MHz to 6 MHz, and 8 MHz to 10 MHz.

[0125] That is, the frequency-domain resources determined by the first device for the i-th second device can avoid frequency band Y as much as possible, thereby improving the communication quality between the first device and the i-th second device. Using the above method, when the first device communicates with multiple second devices, for one of the second devices, when strong interference or deep fading is found in a certain frequency band, the strong interference (or deep fading) can be avoided, and a frequency band with less impact (i.e., frequency-domain resources) can be selected for the second device.

[0126] Combined with the above possible implementation 1, after determining frequency band Y, the first device can determine one or more frequency-domain resources among the N frequency-domain resources as the frequency-domain resources corresponding to the i-th second device. The frequency band or coverage range corresponding to the frequency-domain resources corresponding to the i-th second device does not include frequency band Y.

[0127] Combined with the above Figure 5 , assuming that the subcarrier serial number range corresponding to frequency band Y is 55 to 120, the first device can not allocate frequency-domain resource 3 to the i-th second device, but allocate one or more of frequency-domain resources 4 to 6, or frequency-domain resources 9 to 14, or frequency-domain resources 19 to 30, and there is no overlap in the frequency-domain resources allocated to the i-th second device.

[0128] For example, in a possible resource allocation method, if the first device determines to allocate frequency-domain resource 4 to the i-th second device, the first device can send the indication information corresponding to the i-th second device to the i-th second device, and the indication information corresponding to the i-th second device indicates index 4. The i-th second device determines frequency-domain resource 4 according to index 4 indicated by the indication information corresponding to the i-th second device and the correspondence between the N frequency-domain resources and their indexes, and then the i-th second device communicates with the first device on frequency-domain resource 4.

[0129] Or, in another possible resource allocation method, if the first device determines to allocate frequency-domain resource 9 to the i-th second device, the first device can send the indication information corresponding to the i-th second device to the i-th second device, and the indication information corresponding to the i-th second device indicates index 9. The i-th second device determines frequency-domain resource 4 according to index 9 indicated by the indication information corresponding to the i-th second device and the correspondence between the N frequency-domain resources and their indexes, and then the i-th second device communicates with the first device on frequency-domain resource 9.

[0130] Using the above allocation method, when there is narrow-band interference, by removing the frequency-domain resources where the narrow-band interference or deep fading is located and distributing other frequency-domain resources to the second device, it can play the role of making full use of the bandwidth and improving the throughput.

[0131] It can be understood that, in addition to allocating frequency-domain resources to the i-th second device based on the channel characteristics between the first device and the i-th second device, the frequency-domain resources corresponding to the i-th second device can also be determined in combination with the data volume to be transmitted between the first device and the i-th second device.

[0132] Combining the above two possible resource allocation methods, it can be seen that if the data volume to be transmitted between the first device and the i-th second device is large, the first device can allocate frequency-domain resource 4 to the i-th second device; if the data volume to be transmitted between the first device and the i-th second device is small, the first device can allocate frequency-domain resource 9 to the i-th second device.

[0133] Or, if the data volume to be transmitted between the first device and the i-th second device is small, the first device can allocate frequency-domain resource 9 to the i-th second device. If the data volume to be transmitted between the first device and the i-th second device is large, the first device can allocate frequency-domain resources 9, 10, and 11 to the i-th second device.

[0134] Therefore, the first device can flexibly configure appropriate frequency-domain resources for the second device, which can effectively utilize the available channels and improve the system throughput rate on the premise of avoiding interference and fading.

[0135] In addition, if the data volume to be transmitted between the first device and the i-th second device is very small, the first device may also allocate frequency-domain resource 3 to the i-th second device, which is not limited in this application.

[0136] Combining the above possible implementation method 2, after determining frequency band Y, the first device can determine the frequency-domain resources corresponding to the i-th second device according to frequency band Y. The frequency-domain resources corresponding to the i-th second device correspond to frequency band X, and frequency band X does not include frequency band Y.

[0137] Assuming that the subcarrier serial number range corresponding to frequency band Y is 70 to 120, the first device can determine and send the indication information corresponding to the i-th second device. The indication information corresponding to the i-th second device indicates that the starting subcarrier serial number of the frequency-domain resources corresponding to the i-th second device is 124, and the ending subcarrier serial number is 300. The i-th second device determines the frequency-domain resources corresponding to the i-th second device according to the indication information corresponding to the i-th second device, and then the i-th second device communicates with the first device on the frequency-domain resources corresponding to the i-th second device.

[0138] For another example, assuming that frequency band Y is from 1.5 MHz to 3 MHz, the first device can determine and send the indication information corresponding to the i-th second device. The indication information corresponding to the i-th second device indicates that the starting frequency point of the frequency domain resource corresponding to the i-th second device is 3.5 MHz, and the ending subcarrier serial number is 6 MHz. The i-th second device determines the frequency domain resource corresponding to the i-th second device according to the indication information corresponding to the i-th second device, and then the i-th second device communicates with the first device on the frequency domain resource corresponding to the i-th second device.

[0139] Therefore, the first device can flexibly configure appropriate frequency domain resources for the second device, without relying on fixed allocated resource positions and sizes, can effectively utilize available channels, and improve system throughput.

[0140] In addition, in a possible implementation manner, the first device can also determine the frequency domain resources corresponding to M second devices according to the value of M.

[0141] Example 1, as Figure 7A shown, if the number of second devices is 1, the first device can send the indication information corresponding to the second device to the second device. The indication information corresponding to the second device indicates that the starting subcarrier serial number of the frequency domain resource corresponding to the second device is s1, and the ending subcarrier serial number is s2. Wherein, s1 and s2 are determined according to at least one of the channel characteristics between the second device and the first device and the data volume to be transmitted.

[0142] Example 2, as Figure 7B shown, if the number of second devices is 2, denoted as STA1 and STA2, the first device can send the indication information corresponding to STA1 to STA1. The indication information corresponding to STA1 indicates that the starting subcarrier serial number of the frequency domain resource corresponding to STA1 is s1, and the ending subcarrier serial number is s2. The first device can send the indication information corresponding to STA2 to STA2. The indication information corresponding to STA2 indicates that the starting subcarrier serial number of the frequency domain resource corresponding to STA2 is s3, and the ending subcarrier serial number is s4.

[0143] Wherein, s1, s2, s3 and s4 are determined according to at least one of the channel characteristics between STA1 and the first device, the data volume to be transmitted between STA1 and the first device, the channel characteristics between STA2 and the first device, the data volume to be transmitted between STA2 and the first device, and the number of second devices being 2.

[0144] Example 3, as Figure 7CAs shown, if the number of the second devices is 3, denoted as STA1, STA2, and STA3, the first device can send the indication information corresponding to STA1 to STA1. The indication information corresponding to STA1 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA1 is s1, and the ending subcarrier serial number is s2. The first device sends the indication information corresponding to STA2 to STA2. The indication information corresponding to STA2 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA2 is s3, and the ending subcarrier serial number is s4. The first device sends the indication information corresponding to STA3 to STA3. The indication information corresponding to STA3 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA3 is s5, and the ending subcarrier serial number is s6.

[0145] Among them, s1, s2, s3, s4, s5, and s6 are determined according to at least one of the channel characteristics between STA1 and the first device, the data volume to be transmitted between STA1 and the first device, the channel characteristics between STA2 and the first device, the data volume to be transmitted between STA2 and the first device, the channel characteristics between STA3 and the first device, the data volume to be transmitted between STA3 and the first device, and the number of the second devices being 3.

[0146] Example 4, as Figure 7D As shown, if the number of the second devices is 4, denoted as STA1, STA2, STA3, and STA4, the first device can send the indication information corresponding to STA1 to STA1. The indication information corresponding to STA1 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA1 is s1, and the ending subcarrier serial number is s2. The first device sends the indication information corresponding to STA2 to STA2. The indication information corresponding to STA2 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA2 is s3, and the ending subcarrier serial number is s4. The first device sends the indication information corresponding to STA3 to STA3. The indication information corresponding to STA3 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA3 is s5, and the ending subcarrier serial number is s6. The first device sends the indication information corresponding to STA4 to STA4. The indication information corresponding to STA4 indicates that the starting subcarrier serial number of the frequency-domain resource corresponding to STA4 is s7, and the ending subcarrier serial number is s8.

[0147] Among them, s1, s2, s3, s4, s5, s6, s7, and s8 are determined according to at least one of the channel characteristics between STA1 and the first device, the amount of data to be transmitted between STA1 and the first device, the channel characteristics between STA2 and the first device, the amount of data to be transmitted between STA2 and the first device, the channel characteristics between STA3 and the first device, the amount of data to be transmitted between STA3 and the first device, the channel characteristics between STA4 and the first device, the amount of data to be transmitted between STA4 and the first device, and the number of the second devices being 4.

[0148] S620: The first device communicates with the corresponding second device on the frequency domain resources respectively corresponding to the M second devices.

[0149] For example, the first device may send a downlink data frame, and carry M pieces of indication information in the frame control field of the downlink data frame. The downlink data frame also carries the downlink data respectively corresponding to the M second devices. Among them, the first device sends the downlink data corresponding to the i-th second device on the frequency domain resource corresponding to the i-th second device.

[0150] For example, as Figure 8 shown is a schematic diagram of the frame structure of a downlink data frame. Assume that the M second devices are 4 STAs, namely STA1, STA2, STA3, and STA4 respectively, and the first device is a CCO. The present application does not limit the number of V1 FC1 fields and the number of V2 FC2 fields. For example, the number of V1 FC1 fields is 4 or 12. The number of V1 FC1 fields and the number of V2 FC2 fields may be the same or different. The V1 FC1 field and the V2 FC2 field are modulated on a known frequency band. The data part is modulated on the frequency domain resources respectively corresponding to the 4 STAs. Among them, the V1 FC1 field may indicate that the downlink data frame is for multi-user transmission, and the V2 FC2 field may carry 4 pieces of indication information, namely the indication information corresponding to STA1, the indication information corresponding to STA2, the indication information corresponding to STA3, and the indication information corresponding to STA4, for indicating the frequency domain resources respectively corresponding to these 4 STAs. It can be understood that the V1 FC1 field and the V2 FC2 field may also carry other information, which is not limited in the present application. Any one of the above 4 STAs can obtain the frequency domain resource corresponding to itself by parsing the V1 FC1 field and the V2 FC2 field, and then demodulate the data on the frequency domain resource corresponding to itself. Among them, the frequency domain resources respectively corresponding to STA1, STA2, STA3, and STA4 do not overlap, and the data amounts respectively corresponding to STA1, STA2, STA3, and STA4 may be the same or different, which is not limited in the present application.

[0151] For another example, the first device may send a trigger frame, and M pieces of indication information are carried in the frame control field of the trigger frame. Each of the M second devices sends corresponding uplink data on the corresponding frequency-domain resource. Among them, the i-th second device sends the uplink data corresponding to the i-th second device on the frequency-domain resource corresponding to the i-th second device.

[0152] By adopting the above method, in the scenario where the first device communicates with multiple second devices simultaneously, reasonable configuration of the resources used for communicating with each second device is achieved, and the throughput is improved.

[0153] It can be understood that, in order to implement the functions in the above embodiments, the first device and the second device include corresponding hardware structures and / or software modules for executing various functions. Those skilled in the art should easily realize that, combining the units and method steps of each example described in the embodiments disclosed in the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application scenario and design constraint conditions of the technical solution.

[0154] Figure 9 and Figure 10 FIG. is a schematic structural diagram of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the first device or the second device in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0155] As Figure 9 shown, the communication device 900 includes a processing unit 910 and a transceiver unit 920. The communication device 900 is used to implement the first device or the second device in the above method embodiments.

[0156] When the communication device 900 is used to implement the above Figure 4 or Figure 6 functions of the first device in the method embodiment shown:

[0157] The transceiver unit 920 is used to receive and send information; the processing unit 910 is used to send at least two pieces of indication information through the transceiver unit 920. The at least two pieces of indication information correspond one-to-one to at least two second devices. The indication information corresponding to the i-th second device among the at least two pieces of indication information indicates the frequency-domain resource corresponding to the i-th second device. The i-th second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices correspond one-to-one to at least two frequency-domain resources, the at least two frequency-domain resources are different from each other, and the frequency-domain resource corresponding to the i-th second device is one of the at least two frequency-domain resources; communicate with the at least two second devices on the at least two frequency-domain resources by using the OFDMA method.

[0158] In a possible design, the indication information corresponding to the i-th second device indicates the index of the frequency-domain resource corresponding to the i-th second device.

[0159] In a possible design, the frequency-domain resource corresponding to the i-th second device is one or more of N frequency-domain resources, where N is a positive integer, and the N frequency-domain resources are determined according to a predetermined resource allocation method.

[0160] In a possible design, the N frequency-domain resources are determined according to the maximum available frequency band of the PLC technology.

[0161] In a possible design, the maximum available frequency band of the power line carrier communication (PLC) technology is 0.7 MHz to 12 MHz; the N frequency domain resources include frequency domain resource 0, and the subcarrier serial number range corresponding to the frequency domain resource 0 is 32 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 1 or frequency domain resource 2, where the subcarrier serial number range corresponding to the frequency domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency domain resource 2 is 234 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 3, frequency domain resource 4, frequency domain resource 5 or frequency domain resource 6, where the subcarrier serial number range corresponding to the frequency domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency domain resource 6 is 366 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 7, frequency domain resource 8, frequency domain resource 9, frequency domain resource 10, frequency domain resource 11, frequency domain resource 12, frequency domain resource 13 or frequency domain resource 14, where the subcarrier serial number range corresponding to the frequency domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to the frequency domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to the frequency domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to the frequency domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to the frequency domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to the frequency domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to the frequency domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to the frequency domain resource 14 is 430 to 490; and / or, the N frequency domain resources include at least one of frequency domain resource 15, frequency domain resource 16, frequency domain resource 17, frequency domain resource 18, frequency domain resource 19, frequency domain resource 20, frequency domain resource 21, frequency domain resource 22, frequency domain resource 23, frequency domain resource 24, frequency domain resource 25, frequency domain resource 26, frequency domain resource 27, frequency domain resource 28, frequency domain resource 29, frequency domain resource 30, where the subcarrier serial number range corresponding to the frequency domain resource 15 is 32 to 51, the subcarrier serial number range corresponding to the frequency domain resource 16 is 55 to 74, the subcarrier serial number range corresponding to the frequency domain resource 17 is 78 to 97, the subcarrier serial number range corresponding to the frequency domain resource 18 is 101 to 120, the subcarrier serial number range corresponding to the frequency domain resource 19 is 124 to 148, the subcarrier serial number range corresponding to the frequency domain resource 20 is 152 to 176, and the subcarrier serial number range corresponding to the frequency domain resource 21 is 180 to 203;The subcarrier serial number range corresponding to the frequency-domain resource 22 is 207 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 23 is 234 to 263, the subcarrier serial number range corresponding to the frequency-domain resource 24 is 267 to 296, the subcarrier serial number range corresponding to the frequency-domain resource 25 is 300 to 329, the subcarrier serial number range corresponding to the frequency-domain resource 26 is 333 to 362, the subcarrier serial number range corresponding to the frequency-domain resource 27 is 366 to 394, the subcarrier serial number range corresponding to the frequency-domain resource 28 is 398 to 426, the subcarrier serial number range corresponding to the frequency-domain resource 29 is 430 to 458, and the subcarrier serial number range corresponding to the frequency-domain resource 30 is 462 to 490.

[0162] In a possible design, the at least two frequency-domain resources are further determined according to the number of the at least two second devices.

[0163] In a possible design, the frequency-domain resource corresponding to the i-th second device and the frequency-domain resource corresponding to the j-th second device do not include the same subcarriers, where the j-th second device is another one of the at least two second devices, and j is a positive integer.

[0164] When the communication device 900 is used to implement the function of the second device in the above Figure 4 or Figure 6 method embodiment shown:

[0165] The transceiver unit 920 is configured to transmit and receive information; the processing unit 910 is configured to receive, through the transceiver unit 920, the indication information corresponding to the i-th second device from the first device, where the indication information corresponding to the i-th second device indicates the frequency-domain resource corresponding to the i-th second device; the i-th second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices and the at least two frequency-domain resources are in one-to-one correspondence, the at least two frequency-domain resources are different from each other, and the frequency-domain resource corresponding to the i-th second device is one of the at least two frequency-domain resources; communicate with the first device on the frequency-domain resource corresponding to the i-th second device.

[0166] In a possible design, the indication information corresponding to the i-th second device indicates the index of the frequency-domain resource corresponding to the i-th second device.

[0167] In a possible design, the frequency-domain resource corresponding to the i-th second device is one or more of N frequency-domain resources, where N is a positive integer, and the N frequency-domain resources are determined according to a predetermined resource allocation method.

[0168] In a possible design, the N frequency-domain resources are determined according to the maximum available frequency band of the PLC technology.

[0169] In a possible design, the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz; the N frequency-domain resources include frequency-domain resource 0, and the subcarrier serial number range corresponding to the frequency-domain resource 0 is 32 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 1 or frequency-domain resource 2, where the subcarrier serial number range corresponding to the frequency-domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency-domain resource 2 is 234 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 3, frequency-domain resource 4, frequency-domain resource 5, or frequency-domain resource 6, where the subcarrier serial number range corresponding to the frequency-domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency-domain resource 6 is 366 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14, where the subcarrier serial number range corresponding to the frequency-domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to the frequency-domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to the frequency-domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to the frequency-domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to the frequency-domain resource 14 is 430 to 490; and / or, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, or frequency-domain resource 30, where the subcarrier serial number range corresponding to the frequency-domain resource 15 is 32 to 51, the subcarrier serial number range corresponding to the frequency-domain resource 16 is 55 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 17 is 78 to 97, the subcarrier serial number range corresponding to the frequency-domain resource 18 is 101 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 19 is 124 to 148, the subcarrier serial number range corresponding to the frequency-domain resource 20 is 152 to 176, and the subcarrier serial number range corresponding to the frequency-domain resource 21 is 180 to 203;The subcarrier serial number range corresponding to the frequency domain resource 22 is 207 to 230, the subcarrier serial number range corresponding to the frequency domain resource 23 is 234 to 263, the subcarrier serial number range corresponding to the frequency domain resource 24 is 267 to 296, the subcarrier serial number range corresponding to the frequency domain resource 25 is 300 to 329, the subcarrier serial number range corresponding to the frequency domain resource 26 is 333 to 362, the subcarrier serial number range corresponding to the frequency domain resource 27 is 366 to 394, the subcarrier serial number range corresponding to the frequency domain resource 28 is 398 to 426, the subcarrier serial number range corresponding to the frequency domain resource 29 is 430 to 458, and the subcarrier serial number range corresponding to the frequency domain resource 30 is 462 to 490.;

[0170] In a possible design, the at least two frequency domain resources are further determined according to the number of the at least two second devices.

[0171] In a possible design, the frequency domain resource corresponding to the i-th second device and the frequency domain resource corresponding to the j-th second device do not include the same subcarriers, where the j-th second device is another one of the at least two second devices, and j is a positive integer.

[0172] For a more detailed description of the above processing unit 910 and transceiver unit 920, reference can be directly made to the relevant descriptions in the above method embodiments, and details are not elaborated here.

[0173] As Figure 10 shown, the communication device 1000 includes a processor 1010 and an interface circuit 1020. The processor 1010 and the interface circuit 1020 are coupled to each other. It can be understood that the interface circuit 1020 can be a transceiver or an input / output interface. Optionally, the communication device 1000 may further include a memory 1030, which is used to store instructions executed by the processor 1010 or input data required for the processor 1010 to run instructions or data generated after the processor 1010 runs instructions.

[0174] When the communication device 1000 is used to implement Figure 4 or Figure 6 the method shown, the processor 1010 is used to implement the functions of the above processing unit 910, and the interface circuit 1020 is used to implement the functions of the above transceiver unit 920.

[0175] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0176] In the present application, another example of a providing device is provided. The notification device includes at least one processor and at least one memory. The at least one processor is coupled to the at least one memory. The at least one memory is used to store instructions. When the instructions are executed by the at least one processor, the communication device executes the method in the above embodiments. Taking the communication device including one processor and one memory as an example, as Figure 10 shown, the communication device 1000 includes one processor 1010 and one memory 1030. The processor 1010 is coupled to the memory 1030. Instructions are stored in the memory 1030. When the instructions stored in the memory 1030 are executed by the processor 1010, the communication device 1000 executes the method executed by the first device or the second device in the above embodiments.

[0177] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions may be composed of corresponding software modules. The software modules may be stored in a random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only memory, registers, hard disks, removable hard disks, CD-ROMs, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. The storage medium may also be a component of the processor. The processor and the storage medium may be located in an ASIC. Additionally, the ASIC may be located in the above first device or second device. The processor and the storage medium may also exist as discrete components in the first device or the second device.

[0178] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable devices. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc; or it can be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile types of storage media.

[0179] In various embodiments of the present application, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced to each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0180] In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B can be singular or plural. In the written description of the present application, the character " / " generally represents an "or" relationship between the associated objects before and after; in the formulas of the present application, the character " / " represents a "division" relationship between the associated objects before and after. "Including at least one of A, B, and C" can represent: including A; including B; including C; including A and B; including A and C; including B and C; including A, B, and C.

[0181] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application. The magnitude of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic.

Claims

1. A power line carrier communication method, characterized in that, the method includes: A first device sends at least two indication messages, the at least two indication messages correspond one-to-one to at least two second devices, the indication message corresponding to the i-th second device among the at least two indication messages indicates the frequency domain resource corresponding to the i-th second device, the i-th second device is any one of the at least two second devices, and i is a positive integer; the at least two second devices correspond one-to-one to at least two frequency domain resources, the at least two frequency domain resources are different from each other, and the frequency domain resource corresponding to the i-th second device is one of the at least two frequency domain resources; The first device and the at least two second devices communicate in an orthogonal frequency division multiple access (OFDMA) manner on the at least two frequency domain resources.

2. The method according to claim 1, characterized in that, the indication message corresponding to the i-th second device indicates the index of the frequency domain resource corresponding to the i-th second device.

3. The method according to claim 2, characterized in that, the frequency domain resource corresponding to the i-th second device is one or more of N frequency domain resources, N is a positive integer, and the N frequency domain resources are determined according to a predetermined resource allocation method.

4. The method according to claim 3, characterized in that, the N frequency domain resources are determined according to the maximum available frequency band of power line carrier communication (PLC) technology.

5. The method according to claim 4, characterized in that, the maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz; the N frequency domain resources include a frequency domain resource 0, and the subcarrier serial number range corresponding to the frequency domain resource 0 is 32 to 490; and / or, the N frequency domain resources include at least one of a frequency domain resource 1 or a frequency domain resource 2, wherein the subcarrier serial number range corresponding to the frequency domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency domain resource 2 is 234 to 490; and / or, the N frequency domain resources include at least one of a frequency domain resource 3, a frequency domain resource 4, a frequency domain resource 5 or a frequency domain resource 6, wherein the subcarrier serial number range corresponding to the frequency domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency domain resource 6 is 366 to 490; And / or, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14, where the subcarrier serial number range corresponding to the frequency-domain resource 7 is 32 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 8 is 78 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 9 is 124 to 176, the subcarrier serial number range corresponding to the frequency-domain resource 10 is 180 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 11 is 234 to 296, the subcarrier serial number range corresponding to the frequency-domain resource 12 is 300 to 362, the subcarrier serial number range corresponding to the frequency-domain resource 13 is 366 to 426, and the subcarrier serial number range corresponding to the frequency-domain resource 14 is 430 to 490; And / or, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, or frequency-domain resource 30, where the subcarrier serial number range corresponding to the frequency-domain resource 15 is 32 to 51, the subcarrier serial number range corresponding to the frequency-domain resource 16 is 55 to 74, the subcarrier serial number range corresponding to the frequency-domain resource 17 is 78 to 97, the subcarrier serial number range corresponding to the frequency-domain resource 18 is 101 to 120, the subcarrier serial number range corresponding to the frequency-domain resource 19 is 124 to 148, the subcarrier serial number range corresponding to the frequency-domain resource 20 is 152 to 176, the subcarrier serial number range corresponding to the frequency-domain resource 21 is 180 to 203; the subcarrier serial number range corresponding to the frequency-domain resource 22 is 207 to 230, the subcarrier serial number range corresponding to the frequency-domain resource 23 is 234 to 263, the subcarrier serial number range corresponding to the frequency-domain resource 24 is 267 to 296, the subcarrier serial number range corresponding to the frequency-domain resource 25 is 300 to 329, the subcarrier serial number range corresponding to the frequency-domain resource 26 is 333 to 362, the subcarrier serial number range corresponding to the frequency-domain resource 27 is 366 to 394, the subcarrier serial number range corresponding to the frequency-domain resource 28 is 398 to 426, the subcarrier serial number range corresponding to the frequency-domain resource 29 is 430 to 458, and the subcarrier serial number range corresponding to the frequency-domain resource 30 is 462 to 490.

6. The method according to any one of claims 1-5, characterized in that the at least two frequency-domain resources are further determined according to the number of the at least two second devices.

7. The method according to any one of claims 1-6, characterized in that the frequency-domain resources corresponding to the i-th second device and the frequency-domain resources corresponding to the j-th second device do not include the same subcarriers, where the j-th second device is another one of the at least two second devices, and j is a positive integer.

8. A power line carrier communication method, characterized in that, the method includes: The i-th second device receives indication information corresponding to the i-th second device from the first device, and the indication information corresponding to the i-th second device indicates the frequency domain resource corresponding to the i-th second device; the i-th second device is any one of at least two second devices, and i is a positive integer; the at least two second devices correspond to at least two frequency domain resources one by one, the at least two frequency domain resources are different from each other, and the frequency domain resource corresponding to the i-th second device is one of the at least two frequency domain resources; Communicate with the first device on the frequency domain resource corresponding to the i-th second device.

9. The method according to claim 8, characterized in that, The indication information corresponding to the i-th second device indicates the index of the frequency domain resource corresponding to the i-th second device.

10. The method according to claim 9, characterized in that, The frequency domain resource corresponding to the i-th second device is one or more of N frequency domain resources, N is a positive integer, and the N frequency domain resources are determined according to a predetermined resource allocation method.

11. The method according to claim 10, characterized in that, The N frequency domain resources are determined according to the maximum available frequency band of the PLC technology.

12. The method according to claim 11, characterized in that, The maximum available frequency band of the PLC technology is 0.7 MHz to 12 MHz; The N frequency domain resources include frequency domain resource 0, and the subcarrier serial number range corresponding to the frequency domain resource 0 is 32 to 490; And / or, the N frequency domain resources include at least one of frequency domain resource 1 or frequency domain resource 2, wherein the subcarrier serial number range corresponding to the frequency domain resource 1 is 32 to 230, and the subcarrier serial number range corresponding to the frequency domain resource 2 is 234 to 490; And / or, the N frequency domain resources include at least one of frequency domain resource 3, frequency domain resource 4, frequency domain resource 5 or frequency domain resource 6, wherein the subcarrier serial number range corresponding to the frequency domain resource 3 is 32 to 120, the subcarrier serial number range corresponding to the frequency domain resource 4 is 124 to 230, the subcarrier serial number range corresponding to the frequency domain resource 5 is 234 to 362, and the subcarrier serial number range corresponding to the frequency domain resource 6 is 366 to 490; And / or, the N frequency-domain resources include at least one of frequency-domain resource 7, frequency-domain resource 8, frequency-domain resource 9, frequency-domain resource 10, frequency-domain resource 11, frequency-domain resource 12, frequency-domain resource 13, or frequency-domain resource 14, where the subcarrier serial number range corresponding to the frequency-domain resource 7 is 32-74, the subcarrier serial number range corresponding to the frequency-domain resource 8 is 78-120, the subcarrier serial number range corresponding to the frequency-domain resource 9 is 124-176, the subcarrier serial number range corresponding to the frequency-domain resource 10 is 180-230, the subcarrier serial number range corresponding to the frequency-domain resource 11 is 234-296, the subcarrier serial number range corresponding to the frequency-domain resource 12 is 300-362, the subcarrier serial number range corresponding to the frequency-domain resource 13 is 366-426, and the subcarrier serial number range corresponding to the frequency-domain resource 14 is 430-490; And / or, the N frequency-domain resources include at least one of frequency-domain resource 15, frequency-domain resource 16, frequency-domain resource 17, frequency-domain resource 18, frequency-domain resource 19, frequency-domain resource 20, frequency-domain resource 21, frequency-domain resource 22, frequency-domain resource 23, frequency-domain resource 24, frequency-domain resource 25, frequency-domain resource 26, frequency-domain resource 27, frequency-domain resource 28, frequency-domain resource 29, or frequency-domain resource 30, where the subcarrier serial number range corresponding to the frequency-domain resource 15 is 32-51, the subcarrier serial number range corresponding to the frequency-domain resource 16 is 55-74, the subcarrier serial number range corresponding to the frequency-domain resource 17 is 78-97, the subcarrier serial number range corresponding to the frequency-domain resource 18 is 101-120, the subcarrier serial number range corresponding to the frequency-domain resource 19 is 124-148, the subcarrier serial number range corresponding to the frequency-domain resource 20 is 152-176, the subcarrier serial number range corresponding to the frequency-domain resource 21 is 180-203; the subcarrier serial number range corresponding to the frequency-domain resource 22 is 207-230, the subcarrier serial number range corresponding to the frequency-domain resource 23 is 234-263, the subcarrier serial number range corresponding to the frequency-domain resource 24 is 267-296, the subcarrier serial number range corresponding to the frequency-domain resource 25 is 300-329, the subcarrier serial number range corresponding to the frequency-domain resource 26 is 333-362, the subcarrier serial number range corresponding to the frequency-domain resource 27 is 366-394, the subcarrier serial number range corresponding to the frequency-domain resource 28 is 398-426, the subcarrier serial number range corresponding to the frequency-domain resource 29 is 430-458, and the subcarrier serial number range corresponding to the frequency-domain resource 30 is 462-490.

13. The method according to any one of claims 8-12, characterized in that, the at least two frequency-domain resources are further determined according to the number of the at least two second devices.

14. The method according to any one of claims 8-13, characterized in that, The frequency-domain resources corresponding to the i-th second device and the frequency-domain resources corresponding to the j-th second device do not include the same subcarriers, where the j-th second device is another one of the at least two second devices, and j is a positive integer.

15. A communication device, characterized in that, it includes a unit or module for executing the method according to any one of claims 1 to 14.

16. A communication device, characterized in that, the communication device includes at least one processor; the at least one processor is used to execute the method according to any one of claims 1 to 14.

17. A computer-readable storage medium, characterized in that, the computer-readable storage medium includes a program, and when the program runs on a device, the device is caused to execute the method according to any one of claims 1 to 14.

18. A computer program product, characterized in that, the computer program product includes a program or instruction, and when the program or instruction is executed by a device, the device is caused to execute the method according to any one of claims 1 to 14.

Images