WO2023082048A1 - 一种数据传输方法和装置 - Google Patents
一种数据传输方法和装置 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Definitions
- the embodiments of the present application relate to the field of communication technologies, and in particular, to a data transmission method and device.
- Power line communication (PLC) technology refers to the use of existing power lines to transmit data or information.
- the use of power line communication technology basically does not require additional laying of network lines, and the power line covers a wide range, so it has been widely used in the communication field.
- the channel presents a very obvious frequency selective attenuation, causing the signal noise ratio (signal noise ratio, SNR) between different carriers to fluctuate violently. This will affect the reliability of data transmission.
- SNR signal noise ratio
- the robust communication mode (Robust Communication Mode, RCM) defined in the International Telecommunication Union ITU-T G.hn protocol or the Homeplug Powerline Alliance Homeplug protocol defined in the home power line network alliance Robust Mode of Communication (Robust Mode of Communication, ROBO) mode transmits data.
- RCM mode or ROBO mode can realize the time-frequency domain interleaving effect of the load data block by repeatedly encoding the data and modulating it onto multiple orthogonal frequency division multiplexing (OFDM) symbols, which can be used in power line communication More reliable transmission of data.
- OFDM orthogonal frequency division multiplexing
- RCM mode or ROBO mode may be combined with Orthogonal Frequency-Division Multiple Access (OFDMA) technology.
- OFDMA Orthogonal Frequency-Division Multiple Access
- the load data of each user will be concentrated on a small continuous subcarrier, due to the strong frequency selection in power line communication
- a small segment of continuous subcarriers of each user may experience relatively large deep fading or interference, which will lead to a decrease in the communication reliability of this user. Therefore, when the RCM mode or the ROBO mode is combined with the OFDMA technology, it may result in lower communication reliability.
- Embodiments of the present application provide a data transmission method and device, which can improve the reliability of data transmission.
- the first aspect of the embodiments of the present application provides a data transmission method, which can be applied to the field of power line communication, and can also be applied to other wired communication fields.
- the method includes: first, the master device assigns the first time frequency to the terminal device resource blocks.
- the first time-frequency resource block is determined based on the available frequency band locally stored by the master device, the available frequency band includes M consecutive subcarriers, and the OFDM symbol in the first time-frequency resource block includes N discrete subcarriers in the frequency domain Carrier, M is greater than N.
- the master device transmits data to the terminal device on the first time-frequency resource block.
- This solution does not limit the number of OFDM symbols included in the first time-frequency resource block, and each OFDM symbol in the first time-frequency resource block includes multiple discrete subcarriers in the frequency domain based on the local storage of the master device Available frequency bands are determined.
- This solution does not limit the specific rules for determining the first time-frequency resource block in the available frequency band, as long as multiple discrete subcarriers are determined from multiple continuous subcarriers, they are all within the protection scope of this solution.
- the numbers of multiple discrete subcarriers included in the frequency domain by different OFDM symbols in the first time-frequency resource block may be the same or different.
- the number of subcarriers spaced between two adjacent subcarriers may be the same or different.
- the comb division manners of N discrete subcarriers included in different OFDM symbols in the frequency domain in the first time-frequency resource block may be the same or different.
- the first time-frequency resource block is a comb-shaped resource block obtained based on continuous time-frequency resource division, that is, the subcarriers on the first time-frequency resource block are discrete.
- the frequency selection of all discrete subcarriers on the first time-frequency resource block The characteristics are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band, so that the reliability of data transmission can be improved when data is transmitted on the first time-frequency resource block.
- the above-mentioned master device transmitting data to the terminal device on the first time-frequency resource block includes: the master device transmits data to the terminal device on the first time-frequency resource block based on a replicated modulation and coding scheme .
- the master device transmits data to the terminal device on the first time-frequency resource block based on a replicated modulation and coding scheme, including: the master device transmits data based on a robust communication mode RCM or a robust communication mode ROBO mode, transmitting data to the terminal device on the first time-frequency resource block.
- the number of subcarriers spaced between two adjacent subcarriers among the above N discrete subcarriers is equal.
- an equal number of subcarriers at each interval can be divided into resources in the first time-frequency resource block, so that N discrete subcarriers in the first time-frequency resource block
- the number of subcarriers spaced between two adjacent subcarriers in a carrier is equal. That is to say, in this solution, the first time-frequency resource block is divided in the M consecutive subcarriers included in the available frequency band in a comb-like manner.
- the first time-frequency resource block may also be divided in an unequally distributed comb-shaped manner among the M consecutive subcarriers included in the available frequency band.
- the positions of the above N discrete subcarriers are related to the number of resource divisions and initial subcarrier positions.
- initial subcarrier positions of different OFDM symbols in the first time-frequency resource block may be the same or different.
- the discrete subcarriers corresponding to each OFDM symbol in the first time-frequency resource block can be determined from the available frequency band according to the number of resource divisions and the initial subcarrier positions, so that multiple first The resource sizes of the time-frequency resource blocks are similar.
- the number of resource divisions is K, and the number of subcarriers spaced between two adjacent subcarriers is K-1.
- each interval of K-1 subcarriers can be divided into resources in the first time-frequency resource block, so that The number of subcarriers spaced between two adjacent subcarriers among the N discrete subcarriers in the first time-frequency resource block is K-1.
- the number of subcarriers spaced between two adjacent subcarriers is the number of available subcarriers.
- N discrete subcarriers can be determined from M consecutive available subcarriers, then the N The number of sub-carriers spaced between two adjacent sub-carriers in the discrete sub-carriers is the number of available sub-carriers.
- the number of subcarriers spaced between two adjacent subcarriers is the number of physical subcarriers.
- N discrete subcarriers can be determined from M continuous physical subcarriers, then the N The number of sub-carriers spaced between two adjacent sub-carriers in discrete sub-carriers is the number of physical sub-carriers.
- the above-mentioned master device transmitting data to the terminal device on the first time-frequency resource block includes: the master device sends data to the terminal device on the first time-frequency resource block, or the master device transmits data to the terminal device on the first time-frequency resource block; Data from the terminal device is received on the first time-frequency resource block.
- the master device can send data to the terminal device on the first time-frequency resource block, and can also receive data from the terminal device on the first time-frequency resource block. Since the first time-frequency resource block in this solution is Discrete, so that the frequency selection characteristics of all discrete subcarriers on the first time-frequency resource block are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band, so that when sending and receiving data on the first time-frequency resource block The reliability of data transmission can be improved.
- the foregoing method further includes: the master device sends scheduling information to the terminal device.
- the scheduling information includes indication information for indicating the time-frequency resource position of the first time-frequency resource block corresponding to the terminal device.
- the master device can send indication information indicating the time-frequency resource position of the first time-frequency resource block corresponding to the terminal device to the terminal device, so that the terminal device can transmit data on the first time-frequency resource block, so as to Improve the reliability of data transmission of terminal equipment.
- the second aspect of the embodiments of the present application provides a data transmission method, which can be applied to the field of power line communication, and can also be applied to other wired communication fields.
- the method includes: first, the terminal device receives the scheduling information from the master device, The scheduling information includes indication information for indicating the time-frequency resource position of the first time-frequency resource block corresponding to the terminal device.
- the first time-frequency resource block is determined based on the available frequency band locally stored by the master device, the available frequency band includes M continuous subcarriers, and the OFDM symbol in the first time-frequency resource block includes N discrete subcarriers in the frequency domain , the M is greater than the N.
- the terminal device transmits data on the first time-frequency resource block based on the scheduling information.
- the first time-frequency resource block is a comb-shaped resource block obtained by dividing continuous time-frequency resources
- the subcarriers on the first time-frequency resource block are discrete.
- the frequency selection of all discrete subcarriers on the first time-frequency resource block The characteristics are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band, so that the terminal device can improve the reliability of data transmission when transmitting data on the first time-frequency resource block.
- the terminal device transmitting data on the first time-frequency resource block based on the scheduling information includes: the terminal device transmitting data on the first time-frequency resource block based on a replicated modulation and coding scheme.
- the terminal device transmits the data on the first time-frequency resource block based on the copied modulation and coding scheme and scheduling information, including: the terminal device uses a robust communication mode RCM or ROBO mode, Data is transmitted on the first time-frequency resource block.
- the number of subcarriers spaced between two adjacent subcarriers among the above N discrete subcarriers is equal.
- the subcarriers with equal intervals can be divided into resources in the first time-frequency resource block, so that Among the N discrete subcarriers in the first time-frequency resource block, the number of subcarriers spaced between two adjacent subcarriers is equal.
- the positions of the above N discrete subcarriers are related to the number of resource divisions and initial subcarrier positions.
- the discrete subcarriers corresponding to each OFDM symbol in the first time-frequency resource block can be determined from the available frequency band according to the number of resource divisions and the initial subcarrier positions, so that multiple first The resource sizes of the time-frequency resource blocks are similar.
- the number of resource divisions is K, and the number of subcarriers spaced between two adjacent subcarriers is K-1.
- each interval of K-1 subcarriers can be divided into resources in the first time-frequency resource block, so that The number of subcarriers spaced between two adjacent subcarriers among the N discrete subcarriers in the first time-frequency resource block is K-1.
- the number of subcarriers spaced between two adjacent subcarriers is the number of available subcarriers.
- N discrete subcarriers can be determined from M consecutive available subcarriers, then the N The number of sub-carriers spaced between two adjacent sub-carriers in the discrete sub-carriers is the number of available sub-carriers.
- the number of subcarriers spaced between two adjacent subcarriers is the number of physical subcarriers.
- N discrete subcarriers can be determined from M continuous physical subcarriers, then the N The number of sub-carriers spaced between two adjacent sub-carriers in discrete sub-carriers is the number of physical sub-carriers.
- the above-mentioned terminal device transmitting data on the first time-frequency resource block based on the scheduling information includes: the terminal device transmitting data on the first time-frequency resource block based on the scheduling information, or , receiving data on the first time-frequency resource block.
- the terminal device can send data on the first time-frequency resource block, and can also receive data on the first time-frequency resource block. Since the first time-frequency resource block in this solution is discrete, the first time-frequency resource block The frequency selection characteristics of all discrete subcarriers on the time-frequency resource block are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band, so that the reliability of data transmission can be improved when sending and receiving data on the first time-frequency resource block .
- a data transmission device includes: a processor and a transceiver; and the processor is configured to allocate a first time-frequency resource block to a terminal device.
- the first time-frequency resource block is determined based on the available frequency band locally stored by the master device, the available frequency band includes M continuous subcarriers, and the OFDM symbol in the first time-frequency resource block includes N discrete subcarriers in the frequency domain , M is greater than N.
- the processor is further configured to transmit data to the terminal device on the first time-frequency resource block through the transceiver.
- the foregoing processor is specifically configured to transmit the data to the terminal device on the first time-frequency resource block through a transceiver based on a replication-based modulation and coding scheme.
- the above processor is specifically configured to transmit data to the terminal device on the first time-frequency resource block through a transceiver based on a robust communication mode (RCM) or ROBO mode.
- RCM robust communication mode
- the number of subcarriers spaced between two adjacent subcarriers among the above N discrete subcarriers is equal.
- the positions of the above N discrete subcarriers are related to the number of resource divisions and initial subcarrier positions.
- the number of resource divisions is K, and the number of subcarriers spaced between two adjacent subcarriers is K-1.
- the number of subcarriers spaced between two adjacent subcarriers is the number of available subcarriers.
- the number of subcarriers spaced between two adjacent subcarriers is the number of physical subcarriers.
- the above-mentioned terminal device transmits data on the first time-frequency resource block based on the scheduling information, including: the terminal device transmits data on the first time-frequency resource block based on the scheduling information, or, at Data is received on the first time-frequency resource block.
- a data transmission device the device includes: a processor and a transceiver, the transceiver is used to receive scheduling information from the master device, and the scheduling information includes information indicating that the data transmission device corresponds to The indication information of the time-frequency resource position of the first time-frequency resource block, where the first time-frequency resource block is determined based on the available frequency band locally stored by the master device.
- the available frequency band includes M continuous subcarriers, the OFDM symbol in the first time-frequency resource block includes N discrete subcarriers in the frequency domain, and M is greater than N.
- the processor is configured to transmit data on the first time-frequency resource block through the transceiver based on the scheduling information.
- the foregoing processor is specifically configured to transmit the data on the first time-frequency resource block by using the transceiver based on a replication-based modulation and coding scheme.
- the above-mentioned processor is specifically configured to transmit data on the first time-frequency resource block through a transceiver based on a robust communication mode (RCM) or ROBO mode.
- RCM robust communication mode
- the number of subcarriers spaced between two adjacent subcarriers among the above N discrete subcarriers is equal.
- the positions of the above N discrete subcarriers are related to the number of resource divisions and initial subcarrier positions.
- the number of resource divisions is K, and the number of subcarriers spaced between two adjacent subcarriers is K-1.
- the number of subcarriers spaced between two adjacent subcarriers is the number of available subcarriers.
- the number of subcarriers spaced between two adjacent subcarriers is the number of physical subcarriers.
- the above-mentioned processor is specifically configured to, based on the scheduling information, send data on the first time-frequency resource block through a transceiver, or receive data on the first time-frequency resource block.
- a computer-readable storage medium is provided.
- Computer program code is stored in the computer-readable storage medium.
- the processor Execute the method described in the first aspect or the second aspect above.
- the sixth aspect of the embodiments of the present application provides a computer program product, the program product stores computer software instructions executed by the above-mentioned processor, and the computer software instructions are used to implement the solution described in the first aspect or the second aspect program of.
- a seventh aspect of the embodiments of the present application provides a data transmission system, and the data transmission system includes the data transmission device of the third aspect above and the data transmission device of the fourth aspect above.
- FIG. 1 is a schematic diagram of a power line communication channel response provided by an embodiment of the present application
- FIG. 2 is a schematic diagram of a modulation and coding scheme of an RCM mode provided by an embodiment of the present application
- FIG. 3 is a schematic structural diagram of an OFDMA time-frequency resource provided by an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
- FIG. 5 is a schematic flow diagram of a data transmission method provided by an embodiment of the present application.
- FIG. 6 is a schematic structural diagram of resource division provided by an embodiment of the present application.
- FIG. 7 is a schematic structural diagram of another resource division provided by the embodiment of the present application.
- FIG. 8 is a schematic diagram of another RCM mode modulation and coding scheme provided by the embodiment of the present application.
- FIG. 9 is a schematic structural diagram of another resource division provided by the embodiment of the present application.
- FIG. 10 is a schematic diagram of the composition of a data transmission device provided by an embodiment of the present application.
- FIG. 11 is a schematic composition diagram of another data transmission device provided by an embodiment of the present application.
- At least one item (piece) of a, b or c can represent: a, b, c, a and b, a and c, b and c, or, a and b and c, wherein a, b and c can be single or multiple.
- words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect, Those skilled in the art can understand that words such as “first” and “second” do not limit the quantity and execution order. The first, second, etc.
- Transmit in the embodiments of the present application refers to two-way transmission, including actions of sending and/or receiving, unless otherwise specified.
- transmission in the embodiments of the present application includes sending data, receiving data, or sending data and receiving data.
- the data transmission here includes uplink and/or downlink data transmission.
- Data may include channels and/or signals, uplink data transmission means uplink channel and/or uplink signal transmission, and downlink data transmission means downlink channel and/or downlink signal transmission.
- RCM mode In power line communication, due to the real-time change of the load impedance on the line, the SNR between different carriers will fluctuate violently, which will affect the reliability of data transmission.
- data can be transmitted in RCM mode or ROBO mode.
- RCM mode and ROBO mode are modulation and coding schemes in different protocols.
- the scheme of ROBO mode in Homeplug protocol is similar to the scheme of RCM mode in ITU-T G.hn protocol.
- the scheme of RCM mode is introduced in detail below.
- the coded FEC code block is sliced, and the sliced payload bits are repeatedly coded, and through certain rules.
- the repeatedly coded bits are modulated onto each subcarrier of a plurality of OFDM symbols.
- the FEC code block can be divided based on B bits and divided into S segments.
- B floor(kp/N rep )
- kp is the number of bits carried by one OFDM
- N rep is the number of repetitions in repetition coding
- floor represents rounding down.
- S ceil(N FEC /B), where N FEC is the size of the FEC code block, and ceil represents rounding up.
- each of the 4 FEC code blocks can be divided into 3 segments based on B bits , are respectively Sec1, Sec2 and Sec3, and the data size of each segment is B bits.
- each segment of repeated coding is sequentially modulated onto 3 OFDM symbols according to a certain rule.
- the modulation and coding scheme of the ROBO mode in the Homeplug protocol is similar to the modulation and coding scheme of the above RCM mode, and the embodiment of the present application will not describe the modulation and coding scheme of the ROBO mode in detail.
- FIG. 3 is a schematic structural diagram of a time-frequency resource of OFDMA, wherein the smallest unit in the frequency domain is a subcarrier.
- the smallest unit in the time domain is a time slot (slot), and a time slot is 0.5 millisecond (millisecond, ms).
- Each small square in the time-frequency resource grid represents a resource element (resource element, RE), which is the length of one OFDM symbol in the time domain.
- RE resource element
- Twelve consecutive subcarriers in the frequency domain and one slot in the time domain form a resource block (RB). Two slots form a subframe.
- the time-frequency resources in OFDM modulation can be divided into several resource blocks (RB) according to continuous symbols and subcarriers, and then multi-user resource allocation and scheduling are performed with RB as the granularity to realize multi-user access. That is, when RBs are allocated for each user based on the RB division method in OFDMA, the load data of each user will be concentrated on a small segment of continuous subcarriers. Due to the strong frequency-selective fading in power line communication, each user's small segment of continuous subcarriers may experience relatively large deep fading, which will lead to a decrease in communication reliability for this user. Therefore, when the RCM mode or the ROBO mode is combined with the OFDMA technology, it may result in lower communication reliability.
- RB resource blocks
- an embodiment of the present application provides a data transmission method, which can improve the reliability of data transmission in a power line communication system sex.
- the master device and the terminal device in the data transmission method provided in the embodiment of the present application may be the communication device shown in FIG. 4 .
- the communication device 400 includes at least one processor 401 , a memory 402 , a transceiver 403 and a communication bus 404 .
- the processor 401 is the control center of the communication device, and may be one processor, or may be a general term for multiple processing elements.
- the processor 401 is a central processing unit (central processing unit, CPU), may also be a specific integrated circuit (application specific integrated circuit, ASIC), or is configured to implement one or more integrated circuits of the embodiments of the present application , for example: one or more microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (field programmable gate array, FPGA).
- the processor 401 can execute various functions of the communication device by running or executing software programs stored in the memory 402 and calling data stored in the memory 402 .
- the processor 401 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 4 .
- the communication device may include multiple processors, for example, the processor 401 and the processor 405 shown in FIG. 4 .
- processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU).
- a processor herein may refer to one or more detection devices, circuits, and/or processing cores for processing data (eg, computer program instructions).
- the memory 402 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (random access memory, RAM) or other types that can store information and instructions It can also be an electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be programmed by a computer Any other medium accessed, but not limited to.
- the memory 402 may exist independently, and is connected to the processor 401 through the communication bus 404 .
- the memory 402 can also be integrated with the processor 401 .
- the memory 402 is used to store a software program for executing the solution of the present application, and the execution is controlled by the processor 401 .
- the transceiver 403 is used for communicating with other communication devices.
- the transceiver 403 can also be used to communicate with a communication network, such as Ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN) and so on.
- the transceiver 403 may include a receiving unit to implement a receiving function, and a sending unit to implement a sending function.
- the communication bus 404 may be an industry standard architecture (industry standard architecture, ISA) bus, an external detection device interconnection (peripheral component, PCI) bus, or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc.
- the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 4 , but it does not mean that there is only one bus or one type of bus.
- the structure of the communication device shown in FIG. 4 does not constitute a limitation to the communication device.
- the communication device may include more or fewer components than shown in the figure, or combine some components, or arrange different components.
- a data transmission method is provided for the embodiment of the present application.
- the data transmission method can be applied to the field of power line communication, and can also be used in other wired or wireless communication fields.
- the data transmission method includes the following Steps S501-S505.
- the master device allocates a first time-frequency resource block to the terminal device.
- the terminal device may be a device to be scheduled. There may be one or more terminal devices.
- the master device schedules multiple terminal devices at the same time, the master device allocates a first time-frequency resource block for each terminal device, and the first time-frequency resource blocks allocated by different terminal devices are different.
- types of the above-mentioned master device and terminal device are different in different protocols.
- the master device domain master, DM
- the terminal device can be an end point (EP).
- the master device may be a central coordinator (center co-coordinator, CCO), and the terminal device may be a station (station, STA).
- the main device may be an access point device (access point, AP), and the terminal device may be a station STA.
- the embodiment of the present application does not limit specific types of the master device and the terminal device.
- the above-mentioned first time-frequency resource block is determined based on the available frequency band locally stored by the master device, the available frequency band includes M continuous subcarriers, and the OFDM symbol in the first time-frequency resource block includes N discrete subcarriers in the frequency domain Carrier, M is greater than N.
- the available frequency bands stored locally by the master device are frequency bands that can be used by the master device and the terminal device for communication.
- the available frequency band may be a frequency band stipulated in an agreement in the power line communication, or may be a frequency band planned by each country or region.
- the master device can allocate a discrete first time-frequency resource block to the terminal device from the available frequency band, so that the frequency selection characteristics of all subcarriers of the first time-frequency resource block and the frequency selection of all subcarriers of the available frequency band (whole frequency band) The characteristics are basically consistent, thereby improving the reliability of data transmission in power line communication.
- the first time-frequency resource block may be determined from an available frequency band based on a preset rule. For example, according to preset rules, multiple discrete subcarriers may be selected from multiple continuous subcarriers included in the available frequency band to obtain multiple subcarriers corresponding to each OFDM symbol in the first time-frequency resource block.
- the embodiment of the present application does not limit the specific rules for determining the first time-frequency resource block in the available frequency band, as long as multiple discrete subcarriers are determined from multiple continuous subcarriers, they are all within the protection scope of the embodiment of the present application .
- the following embodiments are only exemplary illustrations of some optional implementation manners when determining the first time-frequency resource block in the available frequency band.
- the numbers of multiple discrete subcarriers included in the frequency domain by different OFDM symbols in the first time-frequency resource block may be the same or different.
- symbol 1 in the first time-frequency resource block includes 200 subcarriers in the frequency domain
- symbol 2 in the first time-frequency resource block includes 210 subcarriers in the frequency domain.
- the embodiment of the present application does not limit the specific number of multiple discrete subcarriers included in the frequency domain by each OFDM symbol in the first time-frequency resource block.
- the following embodiments are described by taking the same number of discrete subcarriers included in different OFDM symbols in the frequency domain in the first time-frequency resource block as an example.
- the number of subcarriers spaced between two adjacent subcarriers may be the same or different. That is, the first time-frequency resource block can be divided in the M consecutive subcarriers of the available frequency band by using an evenly divided comb method, or the second time-frequency resource block can be divided in the M consecutive subcarriers of the available frequency band by an unevenly divided comb method.
- a time-frequency resource block can be divided in the M consecutive subcarriers of the available frequency band by using an evenly divided comb method, or the second time-frequency resource block can be divided in the M consecutive subcarriers of the available frequency band by an unevenly divided comb method.
- the first time-frequency resource block may include multiple OFDM symbols, and the multiple discrete subcarriers included in each OFDM symbol in the frequency domain are determined based on the available frequency band.
- the first time-frequency resource block includes The number of OFDM symbols is not limited.
- the comb-like division manners of the N discrete subcarriers included in the frequency domain by different OFDM symbols in the first time-frequency resource block may be different.
- the number of subcarriers spaced between adjacent two subcarriers among the N discrete subcarriers included in the frequency domain by one OFDM symbol is the same, and the N discrete subcarriers included in the other OFDM symbol in the frequency domain In a discrete subcarrier, the number of subcarriers spaced between two adjacent subcarriers is different.
- the embodiment of the present application does not limit the specific implementation of determining the first time-frequency resource block in the available frequency band, and the specific discrete method of the N discrete subcarriers in the first time-frequency resource block, as long as it is from the continuous M subcarriers
- the determination of N discrete subcarriers in the carrier is within the protection scope of the embodiments of the present application.
- the following embodiments are described by taking the N discrete subcarriers included in each OFDM symbol of the first time-frequency resource block in the frequency domain, and the number of subcarriers spaced between two adjacent subcarriers is the same as an example.
- the positions of multiple discrete subcarriers included in each OFDM symbol in the frequency domain in the first time-frequency resource block are related to the number of resource divisions and initial subcarrier positions.
- the initial subcarrier positions of different OFDM symbols in the first time-frequency resource block may be the same or different. For example, taking the first time-frequency resource block including OFDM symbol 1 and OFDM symbol 2 as an example, the initial subcarrier position of OFDM symbol 1 in the first time-frequency resource block is subcarrier 0, and OFDM symbol 1 includes subcarriers in the frequency domain 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8 and so on.
- the initial subcarrier position of OFDM symbol 2 in the first time-frequency resource block is subcarrier 1, and OFDM symbol 2 includes subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9 and so on in the frequency domain. That is, the initial subcarrier positions of OFDM symbol 1 and OFDM symbol 2 in the first time-frequency resource block may be different.
- the following embodiments are illustrated by taking the same initial subcarrier positions of different OFDM symbols in the first time-frequency resource block as an example.
- the number of resource divisions mentioned above may be two, four, six, eight or other numbers.
- the embodiment of the present application does not limit the specific value of the number of resource divisions, and the following embodiments use the number of resource divisions as two or four as examples for illustration.
- the number of resource divisions is four, and the available frequency band includes 1000 consecutive subcarriers, which are respectively subcarriers 0 to 999 as an example.
- the number of resource divisions is four, subcarrier 0, subcarrier 4, subcarrier 8, subcarrier 12, subcarrier 16... up to subcarrier 996 in each OFDM symbol can be divided into one Resource block RB1, the initial subcarrier position of resource block RB1 is subcarrier 0, and each OFDM in resource block RB1 includes 250 discrete subcarriers in the frequency domain.
- Each OFDM in the resource block RB2 includes 250 discrete subcarriers in the frequency domain. Divide subcarrier 2, subcarrier 6, subcarrier 10, subcarrier 14, subcarrier 18... to subcarrier 998 in each OFDM symbol into a resource block RB3, and the initial subcarrier position of resource block RB3 is subcarrier 2.
- Each OFDM in the resource block RB3 includes 250 discrete subcarriers in the frequency domain. Subcarrier 3, subcarrier 7, subcarrier 11, subcarrier 15, subcarrier 19... until subcarrier 999 in each OFDM symbol are divided into a resource block RB4, and the initial subcarrier position of resource block RB4 is subcarrier 3.
- Each OFDM in the resource block RB4 includes 250 discrete subcarriers in the frequency domain.
- the number of resource divisions is two, and the available frequency band includes 1000 consecutive subcarriers, which are subcarriers 0 to subcarriers 999 as an example.
- the number of resource divisions is When two, subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6, subcarrier 8... up to subcarrier 998 in each OFDM symbol can be divided into a resource block RB1 according to preset rules.
- the initial subcarrier position of block RB1 is subcarrier 0, and each OFDM in resource block RB1 includes 500 discrete subcarriers in the frequency domain.
- Subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7, subcarrier 9... until subcarrier 999 in each OFDM symbol are divided into a resource block RB2, and the initial subcarrier position of resource block RB2 is subcarrier 1.
- Each OFDM in the resource block RB2 includes 500 discrete subcarriers in the frequency domain.
- the first time-frequency resource block may be determined from the available frequency band according to a preset rule.
- the preset rule may be stipulated in the protocol.
- the protocol stipulates that when the number of resource divisions is two, Specific time-frequency resource information of two first time-frequency resource blocks that can be divided into frequency bands, and subcarriers included in each OFDM symbol in each first time-frequency resource block in the frequency domain are discrete.
- the OFDM symbols in the first time-frequency resource block include N discrete subcarriers in the frequency domain
- the number of subcarriers spaced between adjacent two subcarriers is equal
- the distance between adjacent two subcarriers is related to the number of resource divisions.
- the number of resource divisions is K
- the number of subcarriers spaced between two adjacent subcarriers is K-1.
- each OFDM symbol in the resource block RB1 includes 250 discrete subcarriers in the frequency domain, and among these 250 discrete subcarriers, The number of subcarriers spaced between two adjacent subcarriers is 3.
- subcarrier 0 and subcarrier 4 are separated by 3 subcarriers, which are subcarrier 1 to subcarrier 3 respectively.
- subcarrier 4 and subcarrier 8 are separated by 3 subcarriers, which are subcarrier 5 to subcarrier 7 respectively.
- each OFDM symbol in the resource block RB1 includes 500 discrete subcarriers in the frequency domain, and among these 500 discrete subcarriers, The number of subcarriers spaced between two adjacent subcarriers is 1. For example, there is one subcarrier 1 spaced between subcarrier 0 and subcarrier 2, and one subcarrier 3 is spaced between subcarrier 2 and subcarrier 4, and so on.
- a comb-shaped division method can be used for division, so that the frequency of all subcarriers of each first time-frequency resource block
- the selection characteristics are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band.
- some subcarriers in the available frequency band may be required to avoid, and such avoidance includes static avoidance and dynamic avoidance.
- Some subcarriers can be turned off directly during static avoidance, and available subcarriers in the available frequency band may change dynamically during dynamic avoidance. That is to say, some carrier segments in the available frequency band may be required to be avoided, so the M consecutive subcarriers included in the above available frequency band may be M consecutive available subcarriers, or may be M consecutive physical subcarriers.
- the M consecutive subcarriers are M consecutive physical subcarriers
- the number of subcarriers spaced between two adjacent subcarriers among the above N discrete subcarriers is the number of physical subcarriers.
- the number of subcarriers included in the available frequency band is M.
- the M consecutive subcarriers include both available subcarriers and unavailable subcarriers (for example, required avoided subcarriers). Based on a preset rule, regardless of whether each subcarrier in the M continuous subcarriers is available or not, the discrete N subcarriers may be determined in a comb-like division manner among the M physical subcarriers.
- each OFDM symbol of each resource block includes 250 discrete subcarriers, and the number of subcarriers spaced between two adjacent subcarriers in the 250 discrete subcarriers is three. That is, there are 3 physical subcarriers between two adjacent subcarriers among the 250 discrete subcarriers.
- the number of subcarriers spaced between adjacent two subcarriers among the above N discrete subcarriers is the number of available subcarriers .
- the number of subcarriers included in the available frequency band may be K, K is greater than or equal to M, and the K subcarriers corresponding to each OFDM symbol include M available subcarriers and K-M unavailable subcarriers (such as, Subcarriers that are required to avoid). Based on preset rules, discrete N subcarriers may be determined among M available subcarriers.
- the available frequency band includes 1000 subcarriers, and subcarrier 4 and subcarrier 5 are unavailable among the 1000 subcarriers. Since subcarrier 4 and subcarrier 5 are unavailable, subcarrier 0, subcarrier 6, subcarrier 10, subcarrier 14... may be divided into one resource block RB1. Subcarrier 1, subcarrier 7, subcarrier 11, subcarrier 15, subcarrier 19... are divided into one resource block RB2. Subcarrier 2, subcarrier 8, subcarrier 12, subcarrier 16, subcarrier 20... are divided into one resource block RB3. Subcarrier 3, subcarrier 9, subcarrier 13, subcarrier 17, subcarrier 21... are divided into one resource block RB4. Each OFDM symbol of each resource block includes 250 or 249 subcarriers, and there are 3 available subcarriers between adjacent two subcarriers among the 250 or 249 discrete subcarriers.
- the master device when the master device allocates the first time-frequency resource block to the terminal device, it may allocate the first time-frequency resource block to the terminal device according to parameters such as the number of terminal devices to be scheduled, the amount of data to be transmitted, and the transmission rate of the terminal device. frequency resource block.
- the number of terminal devices to be scheduled may be the same as or different from the number of resource divisions.
- the master device can divide (a) in FIG.
- the resource block RB1 shown in ) is allocated to the terminal device 1
- the resource block RB2 shown in (a) in FIG. 6 is allocated to the terminal device 2
- the resource block RB3 shown in (a) in FIG. 6 is allocated to the terminal equipment3.
- the master device can also divide the resource blocks shown in (a) in FIG.
- the resource blocks RB1 and RB2 shown in (a) are allocated to the terminal device 1, the resource block RB3 shown in (a) in Figure 6 is allocated to the terminal device 2, and the resource block RB3 shown in (a) in Figure 6 is allocated to RB4 is assigned to terminal device 3 .
- the master device may divide the resource blocks ( The resource block RB1 shown in b) and the resource block RB2 shown in (b) in FIG. 6 are allocated as terminal device 1 and terminal device 2 respectively.
- the master device may allocate the resource block RB1 shown in (b) in FIG. 6 to the terminal device 1, and allocate the resource block RB2 shown in (b) in FIG. 6 to the terminal device 2.
- the master device may also allocate the resource block RB2 shown in (b) in FIG. 6 to the terminal device 1, and allocate the resource block RB1 shown in (b) in FIG. 6 to the terminal device 2.
- the frequency selection characteristics of all subcarriers in each resource block and the frequencies of all subcarriers in the available frequency band are basically consistent, and there is basically no difference between the master device allocating the resource block RB1 to the terminal device 1 and the master device allocating the resource block RB2 to the terminal device 1 .
- the embodiment of the present application does not limit the specific implementation of the first time-frequency resource block allocated by the master device to the terminal device. It should be noted that the subcarriers in the first time-frequency resource block allocated by the master device to the terminal device are discrete , the frequency selection characteristics of all subcarriers in the first time-frequency resource block are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band.
- the master device transmits data to the terminal device on the first time-frequency resource block.
- the master device may transmit data to the terminal device on the first time-frequency resource block corresponding to each terminal device.
- the scheduled terminal devices include terminal device 1 and terminal device 2, the master device allocates the resource block RB1 shown in (b) in Figure 6 to terminal device 1, and allocates the resource block RB1 shown in (b) in Figure 6
- Block RB2 is allocated to terminal device 2 as an example, the master device can transmit data to terminal device 1 on RB1 corresponding to terminal device 1, and transmit data to terminal device 2 on RB2 corresponding to terminal device 2.
- the above step S502 may include: the master device transmits data to the terminal device on the first time-frequency resource block based on the replicated modulation and coding scheme. For example, the master device first copies the transmitted data bits, and then modulates the repeated data bits to different carrier positions of the first time-frequency resource block according to certain rules, and transmits to the terminal device on the first time-frequency resource block. , resulting in the coding benefit of replication.
- the replication-based modulation and coding scheme is a robust communication mode (RCM) or ROBO mode as an example.
- the above step S502 may include: the master device transmits data to the terminal device on the first time-frequency resource block based on the RCM mode or the ROBO mode.
- the encoded FEC code block can be repeatedly encoded, and the repeatedly encoded bits can be modulated to multiple OFDM symbols by certain rules. on each subcarrier.
- the number kp of bits carried by one OFDM becomes 1/k of the entire frequency band (eg, available frequency band), where k is the number of resource divisions mentioned above. For example, taking each OFDM symbol including 1000 subcarriers in the entire frequency domain as an example, if the number of resource divisions is 4, then each OFDM symbol in each first time-frequency resource block includes about 250 discrete subcarriers in the frequency domain subcarriers.
- each OFDM symbol in the entire frequency domain in the frequency domain includes 1000 subcarriers as an example, if the number of resource divisions is 2, then each OFDM symbol in each first time-frequency resource block includes discrete 500 subcarriers in the frequency domain left and right subcarriers. That is, the greater the number of resource divisions, the smaller the number kp of bits carried by one OFDM.
- the FEC code block can be divided based on B bits and divided into S segments.
- B floor(kp/N rep )
- the number of segments S ceil(N FEC /B).
- the repeatedly coded bits when the repeatedly coded bits are modulated onto each subcarrier of multiple OFDM symbols, the repeatedly coded bits may be modulated onto each subcarrier of S OFDM symbols. That is, the number of OFDM symbols can be the same as the number of segments. Of course, the number of OFDM symbols may be different from the number of segments, and the number of OFDM symbols is related to the RCM modulation rule. The following uses an example in which the number of OFDM symbols is the same as the number of segments for description.
- each FEC code block can be divided into 6 segments based on B bits, They are Sec1 to Sec6 respectively, and the data size of each segment is B bits.
- each segment of repeated coding is sequentially modulated onto 6 OFDM symbols according to a certain rule.
- each segment Sec shown in (b) in FIG. 8 can be transmitted through the time-frequency resource of RB1 shown in FIG. 9 .
- each OFDM symbol in RB1 corresponds to 500 discrete subcarriers, which can be divided into 4 carrier segments, and each carrier segment includes 125 discrete subcarriers.
- the 4 carrier segments corresponding to the first OFDM symbol transmit Sec1, Sec2, Sec3 and Sec4 respectively, the 4 carrier segments corresponding to the second OFDM symbol transmit Sec2, Sec3, Sec4 and Sec5 respectively, and the 4 carrier segments corresponding to the third OFDM symbol
- the four carrier segments respectively transmit Sec3, Sec4, Sec5 and Sec6, the four carrier segments corresponding to the fourth OFDM symbol transmit Sec4, Sec5, Sec6 and Sec1 respectively, and the four carrier segments corresponding to the fifth OFDM symbol transmit Sec5 and Sec6 respectively , Sec1 and Sec2, and the 4 carrier segments corresponding to the sixth OFDM symbol transmit Sec6, Sec1, Sec2 and Sec3 respectively.
- the robust communication mode RCM or ROBO mode is used to transmit data to the terminal device on the first time-frequency resource block, since the subcarriers on the first time-frequency resource block are discrete, the first time-frequency resource block
- the frequency selection characteristics of all subcarriers on the above and the frequency selection characteristics of all subcarriers in the available frequency band are basically consistent.
- each segment of data can cover multiple carrier segments of the first time-frequency resource block, and due to the frequency selection characteristics of all subcarriers on the first time-frequency resource block It is basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band, so even if the SNR of some carrier segments is low and the data transmission of a certain segment fails, the segment can still be successfully transmitted on the carrier with a higher SNR. Therefore, adopting the robust communication mode RCM or ROBO mode on the first time-frequency resource block can improve the reliability of data transmission in the power line communication.
- the master device transmits data to the terminal device on the first time-frequency resource block, including: the master device sends data to the terminal device on the first time-frequency resource block, or the master device transmits data to the terminal device on the first time-frequency resource block Receive data from an end device.
- the master device may send data to the terminal device in RCM or ROBO mode.
- the master device can demodulate and decode the data of different users in different time-frequency resources, divide it into corresponding queues, and forward it out.
- step S503 may be included before the above step S502.
- the master device sends scheduling information to the terminal device.
- the scheduling information includes indication information, and the indication information is used to indicate the time-frequency resource position of the first time-frequency resource block corresponding to the terminal device.
- the main device allocates a time-frequency resource block for each terminal device to be scheduled according to parameters such as the number of terminal devices to be scheduled, the amount of data to be transmitted, and the transmission rate of the terminal device, and each time-frequency resource block
- Each OFDM symbol includes N discrete subcarriers in the frequency domain.
- the master device may send scheduling information to each terminal device, where the scheduling information includes Index, and the Index is used to indicate the time-frequency resource information of the time-frequency resource block corresponding to the terminal device.
- the master device allocates the resource block RB1 shown in (b) in FIG. 6 to terminal device 1, the The resource block RB2 shown in (b) in (b) is allocated to the terminal device 2 . Then the master device sends scheduling information 1 to the terminal device 1, and the Index in the scheduling information 1 indicates the time-frequency resource of the resource block RB1 allocated by the master device to the terminal device 1 .
- the Index in the scheduling information 1 indicates that the time-frequency resources of RB1 are subcarrier 0, subcarrier 2, subcarrier 4, subcarrier 6... up to subcarrier 998.
- the main device sends scheduling information 2 to the terminal device 2, and the Index in the scheduling information 2 indicates the time-frequency resource of the resource block RB2 allocated by the main device for the terminal device 2.
- the Index in the scheduling information 2 indicates that the time-frequency resources of RB2 are subcarrier 1, subcarrier 3, subcarrier 5, subcarrier 7... up to subcarrier 999.
- the terminal device receives the scheduling information from the master device.
- the terminal device After receiving the scheduling information, the terminal device can learn the time-frequency resource information of the first time-frequency resource block allocated by the master device.
- the terminal device transmits data on the first time-frequency resource block based on the scheduling information.
- the terminal device can transmit data on the first time-frequency resource block allocated to it by the master device.
- the terminal device may transmit data to the master device on the first time-frequency resource block allocated to it by the master device, or may transmit data to other terminal devices on the first time-frequency resource block allocated to it by the master device.
- the above step S505 may include: the terminal device transmits data on the first time-frequency resource block based on the replicated modulation and coding scheme. For example, the terminal device first copies the transmitted data bits, and modulates the repeated data bits to different carrier positions of the first time-frequency resource block according to certain rules, and transmits on the first time-frequency resource block.
- the replication-based modulation and coding scheme is RCM mode or ROBO mode as an example.
- the above step S505 may include: the terminal device transmits data on the first time-frequency resource block based on the RCM mode or the ROBO mode. Specifically, when the terminal device uses RCM mode or ROBO mode to transmit data on the first time-frequency resource block, after the data is FEC encoded, it can perform repeated encoding on the encoded FEC code block, and the repeated encoding can be performed through certain rules. The subsequent bits are modulated onto each subcarrier of the multiple OFDM symbols of the first time-frequency resource block.
- RCM mode or ROBO mode to transmit data on the first time-frequency resource block.
- the terminal device transmitting data on the first time-frequency resource block includes: the terminal device sending data on the first time-frequency resource block, or the terminal device receiving data on the first time-frequency resource block.
- the terminal device may send data in RCM or ROBO mode.
- the master device can demodulate its own part of the data information based on the scheduling information.
- step S502 can be executed simultaneously with step S504, step S502 can also be executed before steps S504-S505, and step S502 can also be executed after steps S504-S505.
- the first time-frequency resource block since the first time-frequency resource block divides continuous time-frequency resources into comb-shaped resource blocks based on preset rules, the subcarriers on the first time-frequency resource block are discrete , and the frequency selection characteristics of all discrete subcarriers on the first time-frequency resource block are basically consistent with the frequency selection characteristics of all subcarriers in the available frequency band, so data can be improved when transmitting data on the first time-frequency resource block.
- transmission reliability Moreover, the reliability of data transmission can be further improved by using RCM or ROBO to repeatedly encode and modulate data onto multiple OFDM symbols.
- the computer includes hardware structures and/or software modules corresponding to each function.
- the present application can be realized in a combined form of hardware and computer software in combination with the units and algorithm steps of each example described in the embodiments disclosed herein. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.
- the embodiment of the present application may divide the computer into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module.
- the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present invention is schematic, and is only a logical function division, and there may be another division manner in actual implementation.
- FIG. 10 shows a schematic structural diagram of a data transmission device 1000.
- the data transmission device can be the master device in the above-mentioned embodiment, or a chip in the master device.
- the data transmission device 1000 can be used to implement any of the above-mentioned implementations. Examples of data transfer methods.
- the data transmission device 1000 includes: a processing unit 1001 and a transceiver unit 1002 .
- the transceiver unit 1002 is used to support the data transmission apparatus 1000 to send and receive information, or to communicate with other devices.
- the processing unit 1001 is used to control and manage the actions of the above-mentioned data transmission device 1000, and is used to execute the processing performed by the data transmission device 1000 in the above-mentioned embodiment.
- the processing unit 1001 Programs or instructions stored in the memory may also be executed, so that the data transmission device 1000 implements the methods and functions involved in any of the foregoing embodiments.
- the above-mentioned processing unit 1001 may be used to execute, for example, step S501 in FIG. 5 , and/or other processes for the technologies described herein.
- the transceiver unit 1002 may be used to perform, for example, steps S502 and S503 in FIG. 5 , and/or other processes for the techniques described herein.
- all relevant content of each step involved in the above-mentioned method embodiment can be referred to the function description of the corresponding function module, and will not be repeated here.
- the function of the processing unit 1001 may be performed by a processor, and the function of the transceiver unit 1002 may be performed by a transceiver (transmitter/receiver) and/or a communication interface, wherein the processing unit 1001 may use
- the hardware form is embedded in or independent of the processor of the data transmission device 1000, and can also be stored in the memory of the data transmission device 1000 in the form of software, so that the processor can invoke and execute the corresponding operations of the above functional units.
- the processing unit 1001 is a processor and the transceiver unit 1002 is a transceiver
- the specific structure of the data transmission device shown in FIG. 10 can be the communication device shown in FIG.
- the description of relevant content may refer to the functional description of the corresponding components in FIG. 10 , which will not be repeated here.
- FIG. 11 shows a schematic structural diagram of a data transmission device 1100.
- the data transmission device may be the terminal device in the above embodiment, or a chip in the terminal device.
- the data transmission device 1100 may be used to implement any of the above implementations. Examples of data transfer methods.
- the data transmission device 1100 includes: a processing unit 1101 and a transceiver unit 1102 .
- the transceiver unit 1102 is used to support the data transmission apparatus 1100 to send and receive information, or to communicate with other devices.
- the processing unit 1101 is used to control and manage the actions of the above-mentioned data transmission device 1100, and is used to execute the processing performed by the data transmission device 1100 in the above-mentioned embodiment.
- the processing unit 1101 Programs or instructions stored in the memory may also be executed, so that the data transmission device 1100 implements the methods and functions involved in any of the foregoing embodiments.
- the above-mentioned processing unit 1101 may be used to execute, for example, steps S504 and S505 in FIG. 5 through the transceiver unit 1102, and/or other processes for the technologies described herein.
- steps S504 and S505 in FIG. 5 may be used to execute, for example, steps S504 and S505 in FIG. 5 through the transceiver unit 1102, and/or other processes for the technologies described herein.
- all relevant content of each step involved in the above-mentioned method embodiment can be referred to the function description of the corresponding function module, and will not be repeated here.
- the function of the processing unit 1101 may be performed by a processor, and the function of the transceiver unit 1102 may be performed by a transceiver (transmitter/receiver) and/or a communication interface, wherein the processing unit 1101 may use
- the hardware form is embedded in or independent of the processor of the data transmission device 1100, and may also be stored in the memory of the data transmission device 1100 in the form of software, so that the processor can call and execute the operations corresponding to the above functional units.
- the processing unit 1101 is a processor and the transceiver unit 1102 is a transceiver
- the specific structure of the data transmission device shown in FIG. 11 can be the communication device shown in FIG.
- the description of relevant content may refer to the functional description of the corresponding components in FIG. 11 , which will not be repeated here.
- the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium has computer program codes, and when the computer program codes run on the processor, the processor executes the data transmission method as shown in Figure 5 .
- An embodiment of the present application further provides a computer program product, where the computer program product includes program instructions, and when the program instructions are executed, the data transmission method shown in FIG. 5 is implemented.
- the steps of the methods or algorithms described in connection with the disclosure of this application can be implemented in the form of hardware, or can be implemented in the form of a processor executing software instructions.
- Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (Random Access Memory, RAM), flash memory, erasable programmable read-only memory (Erasable Programmable ROM, EPROM), electrically erasable Programmable read-only memory (Electrically EPROM, EEPROM), registers, hard disk, removable hard disk, CD-ROM, or any other form of storage medium known in the art.
- An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
- the storage medium may also be a component of the processor.
- the processor and storage medium can be located in the ASIC.
- the ASIC may be located in the core network interface device.
- the processor and the storage medium may also exist in the core network interface device as discrete components.
- the functions described in the present invention may be implemented by hardware, software, firmware or any combination thereof.
- the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
- Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
- a storage media may be any available media that can be accessed by a general purpose or special purpose computer.
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Abstract
Description
Claims (40)
- 一种数据传输方法,其特征在于,应用于电力线通信,所述方法包括:主设备为终端设备分配第一时频资源块;所述第一时频资源块是基于所述主设备本地存储的可用频段确定的,所述可用频段包括M个连续的子载波,所述第一时频资源块中的OFDM符号在频域上包括N个离散的子载波,所述M大于所述N;所述主设备在所述第一时频资源块上向所述终端设备传输数据。
- 根据权利要求1所述的方法,其特征在于,所述主设备在所述第一时频资源块上向所述终端设备传输数据,包括:所述主设备基于复制的调制编码方案,在所述第一时频资源块上向所述终端设备传输数据。
- 根据权利要求1或2所述的方法,其特征在于,所述主设备基于复制的调制编码方案,在所述第一时频资源块上向所述终端设备传输数据,包括:所述主设备基于鲁棒通信模式RCM或鲁棒通信模式ROBO模式,在所述第一时频资源块上向所述终端设备传输所述数据。
- 根据权利要求1-3中任一项所述的方法,其特征在于,所述N个离散的子载波中相邻两个子载波之间间隔的子载波数量相等。
- 根据权利要求4所述的方法,其特征在于,所述N个离散的子载波的位置与资源划分数量和初始子载波位置有关。
- 根据权利要求5所述的方法,其特征在于,所述资源划分数量为K,所述相邻两个子载波之间间隔的子载波数量为K-1。
- 根据权利要求4-6中任一项所述的方法,其特征在于,所述M个连续的子载波为M个连续的可用子载波时,所述相邻两个子载波之间间隔的子载波数量为可用子载波的数量。
- 根据权利要求4-6中任一项所述的方法,其特征在于,所述M个连续的子载波为M个连续的物理子载波时,所述相邻两个子载波之间间隔的子载波数量为物理子载波的数量。
- 根据权利要求1-8中任一项所述的方法,其特征在于,所述主设备在所述第一时频资源块上向所述终端设备传输数据,包括:所述主设备在所述第一时频资源块上向所述终端设备发送数据,或,所述主设备在所述第一时频资源块上接收来自所述终端设备的数据。
- 根据权利要求1-9中任一项所述的方法,其特征在于,所述方法还包括:所述主设备向所述终端设备发送调度信息;所述调度信息包括指示信息,所述指示信息用于指该终端设备对应的所述第一时频资源块的时频资源位置。
- 一种数据传输方法,其特征在于,应用于电力线通信,所述方法包括:终端设备接收来自主设备的调度信息,所述调度信息包括指示信息,所述指示信息用于指示该终端设备对应的第一时频资源块的时频资源位置,所述第一时频资源块是基于所述主设备本地存储的可用频段确定的;所述可用频段包括M个连续的子载波,所述第一时频资源块中的OFDM符号在频域上包括N个离散的子载波,所述M大于所述N;所述终端设备基于所述调度信息,在所述第一时频资源块上传输数据。
- 根据权利要求11所述的方法,其特征在于,所述终端设备基于所述调度信息,在所述第一时频资源块上传输数据,包括:所述终端设备基于复制的调制编码方案,在所述第一时频资源块上传输所述数据。
- 根据权利要求12所述的方法,其特征在于,所述终端设备基于复制的调制编码方案和所述调度信息,在所述第一时频资源块上传输所述数据,包括:所述终端设备基于鲁棒通信模式RCM或鲁棒通信模式ROBO模式,在所述第一时频资源块上传输所述数据。
- 根据权利要求11-13中任一项所述的方法,其特征在于,所述N个离散的子载波中相邻两个子载波之间间隔的子载波数量相等。
- 根据权利要求14所述的方法,其特征在于,所述N个离散的子载波的位置与资源划分数量和初始子载波位置有关。
- 根据权利要求15所述的方法,其特征在于,所述资源划分数量为K,所述相邻两个子载波之间间隔的子载波数量为K-1。
- 根据权利要求14-16中任一项所述的方法,其特征在于,所述M个连续的子载波为M个连续的可用子载波时,所述相邻两个子载波之间间隔的子载波数量为可用子载波的数量。
- 根据权利要求14-16中任一项所述的方法,其特征在于,所述M个连续的子载波为M个连续的物理子载波时,所述相邻两个子载波之间间隔的子载波数量为物理子载波的数量。
- 根据权利要求11-18中任一项所述的方法,其特征在于,所述终端设备基于所述调度信息,在所述第一时频资源块上传输数据,包括:所述终端设备基于所述调度信息,在所述第一时频资源块上发送数据,或,在所述第一时频资源块上接收数据。
- 一种数据传输装置,其特征在于,所述装置包括:处理器和收发器;所述处理器,用于为终端设备分配第一时频资源块;所述第一时频资源块是基于所述数据传输装置本地存储的可用频段确定的,所述可用频段包括M个连续的子载波,所述第一时频资源块中的OFDM符号在频域上包括N个离散的子载波,所述M大于所述N;所述处理器,还用于通过所述收发器在所述第一时频资源块上向所述终端设备传输数据。
- 根据权利要求20所述的装置,其特征在于,所述处理器,具体用于基于复制的调制编码方案,通过所述收发器在所述第一时频资源块上向所述终端设备传输所述数据。
- 根据权利要求20或21所述的装置,其特征在于,所述处理器,具体用于基于鲁棒通信模式RCM或鲁棒通信模式ROBO模式,通过所述收发器在所述第一时频资源块上向所述终端设备传输所述数据。
- 根据权利要求20-22中任一项所述的装置,其特征在于,所述N个离散的子载波中相邻两个子载波之间间隔的子载波数量相等。
- 根据权利要求23所述的装置,其特征在于,所述N个离散的子载波的位置与资源划分数量和初始子载波位置有关。
- 根据权利要求24所述的装置,其特征在于,所述资源划分数量为K,所述相邻两个子载波之间间隔的子载波数量为K-1。
- 根据权利要求23-25中任一项所述的装置,其特征在于,所述M个连续的子载波为M个连续的可用子载波时,所述相邻两个子载波之间间隔的子载波数量为可用子载波的数量。
- 根据权利要求23-25中任一项所述的装置,其特征在于,所述M个连续的子载波为M个连续的物理子载波时,所述相邻两个子载波之间间隔的子载波数量为物理子载波的数量。
- 根据权利要求20-27中任一项所述的装置,其特征在于,所述处理器,具体用于在所述第一时频资源块上向所述终端设备发送数据,或,在所述第一时频资源块上接收来自所述终端设备的数据。
- 根据权利要求20-28中任一项所述的装置,其特征在于,所述收发器,还用于向所述终端设备发送调度信息;所述调度信息包括指示信息,所述指示信息用于指该终端设备对应的所述第一时频资源块的时频资源位置。
- 一种数据传输装置,其特征在于,所述装置包括:处理器和收发器;所述收发器,用于接收来自主设备的调度信息,所述调度信息包括指示信息,所述指示信息用于指示该数据传输装置对应的第一时频资源块的时频资源位置,所述第一时频资源块是基于所述主设备本地存储的可用频段确定的;所述可用频段包括M个连续的子载波,所述第一时频资源块中的OFDM符号在频域上包括N个离散的子载波,所述M大于所述N;所述处理器,用于基于所述调度信息,通过所述收发器在所述第一时频资源块上传输数据。
- 根据权利要求30所述的装置,其特征在于,所述处理器,具体用于基于复制的调制编码方案,通过所述收发器在所述第一时频资源块上传输所述数据。
- 根据权利要求31所述的装置,其特征在于,所述处理器,具体用于基于鲁棒通信模式RCM或鲁棒通信模式ROBO模式,通过所述收发器在所述第一时频资源块上传输所述数据。
- 根据权利要求30-32中任一项所述的装置,其特征在于,所述N个离散的子载波中相邻两个子载波之间间隔的子载波数量相等。
- 根据权利要求33所述的装置,其特征在于,所述N个离散的子载波的位置与资源划分数量和初始子载波位置有关。
- 根据权利要求34所述的装置,其特征在于,所述资源划分数量为K,所述相邻两个子载波之间间隔的子载波数量为K-1。
- 根据权利要求33-35中任一项所述的装置,其特征在于,所述M个连续的子载波为M个连续的可用子载波时,所述相邻两个子载波之间间隔的子载波数量为可用子载波的数量。
- 根据权利要求33-35中任一项所述的装置,其特征在于,所述M个连续的子 载波为M个连续的物理子载波时,所述相邻两个子载波之间间隔的子载波数量为物理子载波的数量。
- 根据权利要求30-37中任一项所述的装置,其特征在于,所述处理器,具体用于基于所述调度信息,通过所述收发器在所述第一时频资源块上发送数据,或,在所述第一时频资源块上接收数据。
- 一种计算机可读存储介质,所述计算机可读存储介质中具有计算机程序代码,其特征在于,当所述计算机程序代码在处理器上运行时,使得所述处理器执行如权利要求1-19中任一项所述的方法。
- 一种计算机程序产品,其特征在于,所述计算机程序产品包括程序指令,所述程序指令被执行时,以实现如权利要求1-19中任一项所述的方法。
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