WO2022041914A1 - 一种电力线通信方法、装置和系统 - Google Patents

一种电力线通信方法、装置和系统 Download PDF

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WO2022041914A1
WO2022041914A1 PCT/CN2021/098351 CN2021098351W WO2022041914A1 WO 2022041914 A1 WO2022041914 A1 WO 2022041914A1 CN 2021098351 W CN2021098351 W CN 2021098351W WO 2022041914 A1 WO2022041914 A1 WO 2022041914A1
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node
parameter
domain
nodes
parameter information
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PCT/CN2021/098351
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English (en)
French (fr)
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植美鹏
蔡文超
曾焱
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华为技术有限公司
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Publication of WO2022041914A1 publication Critical patent/WO2022041914A1/zh

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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

Definitions

  • the present application relates to the field of power line communication, and in particular, to a power line communication method, device and system.
  • Power line communication is a carrier communication method that transmits data through power lines. Time division multiplexing is used for communication between power line devices. If there are many power line devices in the power line network, the time slot indication information for the power line devices to send data needs to occupy more resources, which will cause the power line devices to transmit business information. low efficiency.
  • Embodiments of the present application provide a power line communication method, device, and system.
  • an embodiment of the present application provides a power line communication method, the method includes: all nodes in a domain exchange their respective parameter information, then the domain master node instructs all nodes, and uniformly calculates parameters of the same type locally Obtain the order of the time slots occupied by each; using the scheme of this embodiment, it is not necessary for the domain master node to indicate the order of the time slots occupied by each node, which reduces the length of the MAP frame and increases the transmission used to transmit data in the MAC cycle. The length of the opportunity, thereby improving the efficiency of each node in transmitting service information in each MAC cycle.
  • the parameter information includes three fields, which are respectively used to identify a node identifier, a parameter type, and a parameter value.
  • the parameter information includes two fields, which are respectively used to identify a node identifier and a parameter value, wherein the fixed bit position where the parameter value is located identifies which parameter type the parameter value corresponds to. .
  • the parameter information includes a bit loading table, a forward error correction code rate, a retransmission rate, a maximum kp value/average kp value of a channel estimation window, an average sending rate, an average receiving rate one or more of the rates.
  • the calculation method includes a weighted proportional fairness sorting algorithm, a round-robin sorting algorithm, a greedy algorithm sorted according to channel quality from good to bad, or other sorting algorithms.
  • the domain master node broadcasts a node list message to all ordinary nodes in the domain, where the node list message includes the node identifier set of the domain master node and all ordinary nodes in the domain; the node The identification set includes information that can uniquely identify each node in the domain; the domain master node checks whether the parameter information of all nodes is collected according to the node list message. This can ensure that each node can accurately determine whether the parameter information of all nodes has been collected, and avoid the inconsistency in the calculation of the node order of different nodes due to the omission of the information of a certain node.
  • an embodiment of the present application provides a power line communication method, which is described from the perspective of a common node, and specifically includes:
  • the common node receives and saves the parameter information sent by the domain master node and other common nodes;
  • the parameter information can at least indicate the identifier of the node sending the parameter information and the value of the parameter;
  • the common node receives the policy indication information sent by the domain master node, where the policy indication information indicates at least one parameter type and calculation method for calculating the time slot sequence;
  • the master node of the receiving domain does not need to indicate the order of the time slots occupied by each node, which reduces the length of the MAP frame and increases the length of the transmission opportunity used to transmit data in the MAC cycle, thereby improving the efficiency of each node.
  • the node list message includes a set of node identifiers of the domain master node and all ordinary nodes in the domain; all ordinary nodes include the ordinary and other ordinary nodes in the domain; the ordinary The node list message is used to check whether parameter information of all nodes is collected. In this way, it can be ensured that each common node can accurately determine whether the parameter information of all nodes has been collected, so as to avoid the inconsistency in the calculation of the node order of different nodes due to the omission of the information of a certain node.
  • an embodiment of the present application provides a power line communication device, as a domain master node, including a transceiver, a processor, and a memory, wherein:
  • the transceiver is used to broadcast and send its own parameter information to all common nodes, receive and save the parameter information sent by common nodes;
  • the parameter information can at least indicate the identifier of the node sending the parameter information and the value of the parameter;
  • the memory is used to save the obtained parameter information, and form a correspondence table identifying node identifiers, parameter types and parameter values;
  • the transceiver is configured to broadcast and send policy indication information to all common nodes in the domain, where the policy indication information indicates at least one parameter type and calculation method for calculating the time slot sequence;
  • the processor is configured to calculate the order of the time slots occupied by the power line communication device according to the parameter category and the calculation method in the policy indication information;
  • the transceiver is further configured to occupy time slots to transmit data according to the calculated sequence.
  • the transceiver is configured to broadcast a node list message to all ordinary nodes in the domain, where the node list message includes the node identity set of the domain master node and all ordinary nodes in the domain;
  • the processor is further configured to check whether parameter information of all nodes is collected according to the node list message.
  • an embodiment of the present application provides a power line communication device, which, as a common node, includes a transceiver, a processor, and a memory, wherein:
  • the transceiver is used to receive parameter information sent by the domain master node and other common nodes; the parameter information can at least indicate the identity of the node sending the parameter information and the value of the parameter;
  • the memory is used to save the obtained parameter information, and form a correspondence table identifying node identifiers, parameter types and parameter values;
  • the transceiver is configured to receive policy indication information sent by the domain master node, where the policy indication information indicates at least one parameter type and calculation method for calculating the time slot sequence;
  • the processor calculates, according to the parameter category and the calculation method in the policy indication information, the sequence of the time slots occupied by the power line communication device;
  • the transceiver occupies time slots in the calculated order to transmit data.
  • the transceiver is further configured to receive a node list message sent by the domain master node, where the node list message includes a node identifier set of the domain master node and all common nodes in the domain;
  • the processor is further configured to check whether parameter information of all nodes is collected according to the node list message.
  • an embodiment of the present application provides a power line communication system, including the above-mentioned domain master node and at least one of the above-mentioned common nodes.
  • an embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected through a line, and the at least one processor is used to run a computer program or a communication interface. instructions to execute the method according to the first aspect or any one of the embodiments of the first aspect, or to execute the method according to the second aspect or any embodiment of the second aspect.
  • an embodiment of the present application provides a computer program product, where the computer program product includes computer software instructions, and the computer software instructions can be loaded by a processor to implement the method of any one of the first aspect or the second aspect above process in .
  • the embodiments of the present application have the following advantages: reducing the length of the timing indication information in the MAP frame, increasing the proportion of transmission opportunities used to transmit data in the MAC cycle, thereby improving the Efficiency in transmitting business information.
  • Fig. 1 is the schematic diagram of PLC network structure
  • Fig. 2 is the structural representation of a MAC cycle in PLC communication
  • Fig. 3 is the schematic diagram of MAP frame structure in PLC communication
  • FIG. 4 is a flowchart of a time slot allocation method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a power line communication device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of another power line communication device provided by an embodiment of the present application.
  • PLC network also known as carrier communication network
  • An exemplary PLC communication system may have the architecture shown in FIG. 1 .
  • a power line communication system may include a power line, a gateway device, a plurality of power line communication devices, and network devices such as terminals.
  • the power line is not only used to transmit current, but also used to drive electrical appliances.
  • Power lines can also be used to provide Internet access through gateway devices connected to the Internet.
  • the power line communication device may include a gateway-side power line communication device (eg, the first power line communication device shown in FIG.
  • the power line communication device may further include a terminal-side power line communication device (for example, the second power line communication device shown in FIG. 1 ) for providing network signals to network devices such as terminals.
  • the above power line communication device may specifically be a power modem (modern) or other types of power line communication modems.
  • the first power line communication device may receive data from the Internet from the gateway device.
  • the first power line communication device can also modulate data from the gateway onto the PLC signal and couple to the power line so that data can be forwarded using the power line.
  • the second power line communication device can be used to demodulate the PLC signal transmitted by the power line to obtain data, and forward the data obtained after demodulation to the terminal by wireless or other means, so that user equipment such as the terminal can receive the data from the Internet side.
  • the system shown in FIG. 1 can also realize data transmission from the terminal to the Internet side.
  • the above power line communication device may specifically be a power modem or other types of power line communication modems, which are not specifically limited in this application.
  • the first power line communication device and/or the second power line communication device when the first power line communication device and/or the second power line communication device performs data transmission as shown in FIG. 1 , the first power line communication device and/or the second power line communication device carry the data packet to be sent in the signal frame,
  • the signal is modulated into an OFDM symbol sequence, and the OFDM symbol sequence is further transmitted through the first frequency band signal and/or the second frequency band signal.
  • the power line communication device at the receiving end can obtain the signal frame through demodulation, and can further analyze the data packet according to the signal frame.
  • TXOP transmission opportunity
  • CFTXOP contention free TXOP
  • shared TXOP shared transmission opportunity
  • each power line communication device in a power line network area is peer-to-peer in terms of network distribution, and can be called nodes.
  • the domain master node allocates transmission time slots (TS) for each power line communication device in the domain through the medium access plan (MAP) frame; in this way, in each MAC cycle, all nodes (including the domain master node and Ordinary nodes) send and receive data in their own time slots.
  • TS transmission time slots
  • MAP medium access plan
  • all nodes including the domain master node and Ordinary nodes
  • the domain master node and the common node are divided according to the processing function of each node in actual operation, and they may be the same or different in hardware or software structure.
  • FIG. 3 shows a prior art MAP frame structure.
  • a MAP frame includes a MAP header field (MAP header) and at least one transmission opportunity description information (TXOP descriptor) field.
  • the MAP header field is mainly used to describe the information of the next MAC cycle, where the next MAC cycle generally refers to a MAC cycle after the MAC cycle in which the MAP frame is sent.
  • the MAP frame may further include an extension field, which is used to indicate information of the TXOP slot, such as a start time, an end time, and the like.
  • the sequence information of the time slot allocation is uniformly sent to each common node through the MAP frame.
  • DBA data bandwidth assign
  • the embodiment of the present invention provides a transmission resource allocation method, which can reduce the length of the time slot indication information in the MAC cycle and increase the length of the transmission opportunity used to transmit data, thereby improving the efficiency of each node in transmitting service information in each MAC cycle. effectiveness.
  • the transmission resource allocation method includes:
  • Step S403 the domain master node and any common node, and any common node and other common nodes exchange their own parameter information; specifically, the domain master node broadcasts and sends its own parameter information, and receives the parameters sent by the common node. Any common node also broadcasts its own parameter information, and receives parameter information sent by other nodes; the parameter information can at least indicate the identifier of the node sending the parameter information and the value of the parameter.
  • any common node in the domain refers to any node other than the domain master node that has been successfully registered in the power line network area where the domain master node is located; all common nodes refer to all common nodes in the domain.
  • all nodes in the domain include the domain master node and all ordinary nodes in the domain, and any node refers to any node among all the nodes in the domain.
  • the parameter information includes three fields representing node identification, parameter type and parameter value respectively; as another example, the parameter information includes the identification node identification and parameter value, but does not include the parameter type indicating field, Instead, the fixed bit position of the parameter value is used to distinguish, for example, the value represented by the agreed first few bits corresponds to one parameter type, and the value represented by the last few bits corresponds to another parameter type.
  • the domain master node and all common nodes save the parameter information obtained by themselves, and form a corresponding relationship table identifying node identifiers, parameter types and parameter values.
  • any node can obtain the parameter information of all nodes in the domain, and each node can save the parameter information corresponding to all nodes.
  • the parameter information of all nodes in the domain is referred to as the parameter information set, and the form can be as shown in Table 1.
  • the parameter information includes a bit loading table (bit loading table, B table for short), forward error correction (FEC) bit error rate, retransmission rate, the maximum kp value/average kp value of the channel estimation window (where the kp value is is one or more of the total number of bits that an OFDM symbol can carry), the average transmission rate, and the average reception rate.
  • bit loading table bit loading table, B table for short
  • FEC forward error correction
  • Step S405 the domain master node broadcasts and sends policy indication information to all ordinary nodes in the domain, where the policy indication information indicates at least one parameter type and calculation method for calculating the time slot sequence;
  • the calculation method may be a weighted proportional fair sorting algorithm, a round-robin sorting algorithm, a greedy algorithm or other sorting algorithms that sort according to channel quality from good to bad.
  • Step S407 the common node selects the corresponding parameter in the interaction information according to the parameter category indicated in the policy indication information, and uses the selected corresponding parameter to calculate the order of time slots occupied by all nodes;
  • the corresponding parameters and calculation methods are used to calculate the order of time slots occupied by all nodes.
  • each node Since each node has obtained the same set of parameter information in step S403, such parameters of all nodes are selected according to the parameter category indicated in the policy indication information, and then the parameters of this type are selected according to the calculation method indicated in the policy indication information.
  • the parameters are calculated to obtain the order of time slots occupied by all nodes in the entire domain, and then it is obtained whether the node is the first or after which nodes occupy the time slots to send data.
  • Step S409 the domain master node or the common node occupies time slots to send data according to the calculated sequence.
  • each node saves the parameter information of all nodes in the domain, the parameter information obtained by each node should be consistent, and the time slot sequence of each node obtained by them according to the same parameters and calculation methods should also be consistent, so each node should be consistent.
  • Nodes send data in the order of their corresponding time slots according to the order in which the time slots are obtained, and there will be no collision.
  • the domain master node can broadcast and send different strategies to all ordinary nodes according to requirements or other strategies at different times. Instructions to allocate different slot sequences.
  • node 1 as the domain master node, can broadcast and send policy indication information 1 to two ordinary nodes in a period, as shown in Table 2, the The policy indication information carries the indication of the parameter category A and the calculation method A. According to the parameters of the category A and the calculation method A, the three nodes can calculate that the time slot occupation sequence is "123".
  • node 1 first occupies the STXOP time slot to send data; after node 1 finishes sending, node 2 then occupies the STXOP time slot to send data; after node 2 finishes sending, node 3 continues to occupy the STXOP time slot to send data.
  • node 1 as the domain master node, can broadcast and send policy indication information 2 to two common nodes in another period.
  • the policy indication information carries the indication of parameter category B and calculation method B.
  • the three nodes can calculate that the time slot occupation sequence is "132"; according to the calculation result, node 1 first Occupies the STXOP time slot to send data; after node 1 finishes sending, node 3 then occupies the STXOP time slot to send data; after node 3 finishes sending, node 2 continues to occupy the STXOP time slot to send data.
  • node 1 as the domain master node, can also broadcast and send policy indication information 3 to two ordinary nodes in another period.
  • the policy indication information carries the indication of parameter category C and calculation method C.
  • the parameters of and calculation method A can calculate that the time slot occupation sequence is "321", and the three nodes occupy time slots to send data according to the sequence "321".
  • Policy Indication Number Policy indication information carries content The time slot sequence calculated by each node Policy Indication Information 1 Parameter Category A + Calculation Method A 123 Policy Indication 2 Parameter Category B + Calculation Method B 132 Policy Indication 3 Parameter category C + calculation method C 321
  • step S403 or after step S403 the following step S401 is further included:
  • Step S401 the domain master node broadcasts and sends a node list message to all ordinary nodes in the domain, the node list message includes the node identification set of the domain master node and all ordinary nodes in the domain; the node identification set includes a node that can uniquely identify each node in the domain. information, such as device identification code (ID) or MAC address.
  • ID device identification code
  • MAC address MAC address
  • each node can check whether the parameter information of all nodes has been collected according to the received node list message. If the information of a certain node K is missing, a message can be broadcast to instruct the node K to resend its parameter information.
  • the method of this embodiment further includes, when a registered common node in the domain leaves the domain, or when a new common node is successfully registered in the domain, the domain master node updates the locally stored list of intra-domain nodes. , and broadcast the updated node list to all ordinary nodes in the domain.
  • the embodiment of the present invention it is not necessary to carry information indicating the time slot sequence of each node when describing an STXOP in the MAP frame, but only carries the policy indication information, which reduces the length of the MAP frame and accordingly reduces the MAC cycle occupied by the MAP frame. It increases the length of the transmission opportunity used to transmit data in the MAC cycle, thereby improving the efficiency of each node in transmitting service information in each MAC cycle. If there are more nodes in the domain, the ratio of MAP frame length reduction will be greater, and the efficiency of each node in transmitting service information in each MAC cycle will be improved more obviously.
  • the MAP frame may not be sent repeatedly until the time sequence sequence of each node needs to be adjusted, and then the MAP frame is sent to further reduce the length and length of the MAC cycle occupied by the MAP. Improve the efficiency of each node transmitting service information in each MAC cycle.
  • each TXOP descriptor carries 3 TXOP extensions (each occupies 1 byte), and the policy indication information carried in a MAP frame (referred to as a new MAP frame) after applying the embodiment of the present invention only needs 48 bytes (that is, only One TXOP descriptor + one TXOP extension) is required, reducing 48 bytes.
  • the length of the old MAP frame is about 123 bytes, of which the frame header occupies 22 bytes, and the auxiliary information occupies at least 5 bytes.
  • the embodiment of the present invention reduces the old MAP frame by 48 bytes, that is, a reduction of 39% length. Assuming that it takes 1 ms to send an old MAP frame, it only takes about 0.61 ms to send each MAP frame in the embodiment of the present invention, and each node can be allocated an additional data transmission time slot of 0.39 ms in each MAC cycle.
  • the slave domain master node and the common node may respectively include hardware structures and/or software modules, which may be implemented in the form of hardware structures, software modules, or hardware structures plus software modules. realize the above functions. From the domain master node and the common node, one of the above functions is performed in the form of a hardware structure, a software module, or a hardware structure plus a software module, depending on the specific application and design constraints of the technical solution.
  • a power line communication apparatus 500 may include a transceiver 501 , a processor 502 , and a memory 503 , and the transceiver 501 , the processor 502 , and the memory 503 are coupled to each other.
  • the transceiver 501 can be used to support the power line communication device 500 to communicate, for example, it can receive and/or send data frames through a communication medium such as a power line; the processor 501 can be used to process the communication protocol and communication data, and to the transceiver 501 It controls with the memory 503, reads the data in the memory 503, executes the software program, and processes the data of the software program.
  • Memory 502 may be used to store instructions (or programs) and data.
  • the processor 502 is configured to execute computer instructions, in cooperation with the transceiver 501 and the memory 503, so that the power line communication apparatus 500 can be used to execute the steps performed by the domain master node in the above method embodiments. Specifically include:
  • the transceiver 501 can be used to broadcast and send its own parameter information to all ordinary nodes, receive and save the parameter information sent by ordinary nodes;
  • the parameter information can at least indicate the identifier of the node sending the parameter information and the parameter information. value;
  • the memory 503 is used to save the obtained parameter information, and form a correspondence table identifying node identifiers, parameter types and parameter values;
  • the transceiver 501 is configured to broadcast and send policy indication information to all common nodes in the domain, where the policy indication information indicates at least one parameter type and calculation method for calculating the time slot sequence;
  • the processor 503 is configured to calculate the order of the time slots occupied by the power line communication device according to the parameter category and the calculation method in the policy indication information;
  • the transceiver 501 is configured to occupy time slots to transmit data according to the calculated sequence.
  • the transceiver 501 is configured to broadcast and send a node list message to all ordinary nodes in the domain, where the node list message includes the node ID set of the domain master node and all ordinary nodes in the domain; the processor 503 It is also used for checking whether the parameter information of all nodes is collected according to the node list message.
  • the parameter information includes one or more of B table, FEC bit error rate, retransmission rate, maximum kp value/average kp value of the channel estimation window, average transmit rate, and average receive rate kind.
  • the calculation method may be a weighted proportional fairness sorting algorithm, a round-robin sorting algorithm, a greedy algorithm that sorts from good to bad according to channel quality, or other sorting algorithms.
  • the transceiver 501, the processor 502, and the memory 503 are all used for processing PLC signals, so the power line communication device 500 may further include a filter for filtering out signals other than PLC signals, and after extracting the PLC signals, sent to the transceiver 501 .
  • the power line communication device 500 in this embodiment acts as a domain master node to execute the steps of the method embodiment corresponding to FIG. 4 , and the detailed descriptions thereof are also applicable to the transceiver 501 in this embodiment. , the actions performed by the processor 502 and the memory 503 system are not repeated here.
  • processor 501 and memory 502 may constitute a communication chip.
  • the chip is coupled with the communication interface 503 to further implement the functions of the above communication device 500 .
  • a power line communication apparatus 600 may include a transceiver 601 , a processor 602 , and a memory 603 , and the transceiver 601 , the processor 602 , and the memory 603 are coupled to each other.
  • the transceiver 601 can be used to support the power line communication device 600 to communicate, for example, it can receive and/or send data frames through a communication medium such as a power line; the processor 601 can be used to process the communication protocol and communication data, and the transceiver 601 It controls with the memory 603, reads the data of the memory 603, executes the software program, and processes the data of the software program.
  • Memory 602 may be used to store instructions (or programs) and data.
  • the processor 602 is configured to execute computer instructions, in cooperation with the transceiver 601 and the memory 603, so that the power line communication device 500 can be used to execute the steps performed by the common nodes in the above method embodiments. Specifically include:
  • the transceiver 601 is configured to receive parameter information sent by the domain master node and other common nodes; the parameter information can at least indicate the identifier of the node sending the parameter information and the value of the parameter; the memory 603 uses In order to save the obtained parameter information, a corresponding relationship table identifying the node ID, parameter type and parameter value is formed.
  • the transceiver 601 is configured to receive policy indication information sent by the domain master node, where the policy indication information indicates at least one parameter type and calculation method for calculating the time slot sequence;
  • the processor 603 calculates the order of the time slots occupied by the power line communication device according to the parameter category and the calculation method in the policy indication information;
  • the transceiver 601 occupies time slots to transmit data according to the calculated sequence.
  • the transceiver 601 is further configured to receive a node list message sent by the domain master node, where the node list message includes the node identifier set of the domain master node and all common nodes in the domain; the processor 603 It is also used for checking whether the parameter information of all nodes is collected according to the node list message.
  • the parameter information includes one or more of B table, FEC bit error rate, retransmission rate, maximum kp value/average kp value of the channel estimation window, average transmit rate, and average receive rate kind.
  • the calculation method may be a weighted proportional fairness sorting algorithm, a round-robin sorting algorithm, a greedy algorithm that sorts from good to bad according to channel quality, or other sorting algorithms.
  • the transceiver 601, the processor 602 and the memory 603 are all used for processing PLC signals, so the power line communication device 600 may further include a filter for filtering out signals other than PLC signals, and after extracting the PLC signals, sent to the transceiver 601 .
  • the power line communication device 600 in this embodiment acts as a common node to perform the steps of the method embodiment corresponding to FIG. 4 , and the detailed descriptions thereof are also applicable to the transceivers 601 and 600 in this embodiment.
  • the actions performed by the processor 602 and the memory 603 system are not repeated here.
  • the above processor 601 and memory 602 may constitute a communication chip.
  • the chip is coupled with the communication interface 603 to further implement the functions of the above communication device 600 .
  • the embodiments of the present application further provide a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the computer is made to execute the above method embodiments and method implementations. The method performed by the sender and/or the receiver in any possible implementation manner of the example.
  • the present application also provides a computer program product, which, when invoked and executed by a computer, can enable the computer to implement the above method embodiments and any possible implementation manner of the method embodiments. in the method performed by the sender and/or the receiver.
  • the present application further provides a chip or a chip system, where the chip may include a processor.
  • the chip may also include a memory (or a storage module) and/or a communication interface (or a communication module), or the chip may be coupled with a memory (or a storage module) and/or a communication interface (or a communication module), wherein the communication interface ( or communication module) can be used to support the chip to perform wired and/or wireless communication, the memory (or storage module) can be used to store a program, and the processor can call the program to implement any one of the above method embodiments and method embodiments.
  • the chip system may include the above chips, or may include the above chips and other discrete devices, such as a memory (or a storage module) and/or a communication interface (or a communication module).
  • the present application further provides a communication system, which may include the power line communication device in the above embodiments corresponding to FIG. 5 and FIG. 6 .
  • the communication system can be used to implement the methods involved in the foregoing method embodiments and any possible implementation manners of the method embodiments.
  • the communication system may have the structure shown in FIG. 1 .
  • the domain master node may be the first power line communication device in the power line communication system shown in FIG. 1
  • the common node may be the second power line communication device in the power line communication system shown in FIG. 1
  • the domain master node may be the second power line communication device in the power line communication system shown in FIG. 1
  • the common node may be the first power line communication device in the power line communication system shown in FIG. 1 .
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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Abstract

本申请实施例公开了一种电力线通信方法和装置，该方法包括域内所有节点交互各自的参数信息，然后根据域主节点的指示，统一在本地对相同类型的参数进行计算得到各自占用时隙的次序；利用本实施例的方案，不需要主节点对每一个节点占用的时隙次序进行指示，减少了MAP帧的长度，增大MAC周期内用来传输数据的传输时机的长度，从而提高各节点在每个MAC周期内传输业务信息的效率。

Description

一种电力线通信方法、装置和系统
本申请要求于2020年8月24日提交中国国家知识产权局、申请号为202010857981.7、申请名称为“一种电力线通信方法、装置和系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力线通信领域，尤其涉及一种电力线通信方法、装置和系统。
背景技术
电力线通信(power line communication，PLC)是一种通过电力线传输数据的载波通信方式。电力线设备之间是采用时分复用方式来进行通信的，如果电力线网络内存在较多的电力线设备，电力线设备发送数据的时隙指示信息需要占据较多资源，就会造成电力线设备传输业务信息的效率不高。
发明内容
本申请实施例提供了一种电力线通信方法、装置和系统。
第一方面，本申请实施例提供了一种电力线通信方法，该方法包括：域内所有节点交互各自的参数信息，然后域主节点的对所有节点进行指示，统一在本地对相同类型的参数进行计算得到各自占用时隙的次序；利用本实施例的方案，不需要域主节点对每一个节点占用的时隙次序进行指示，减少了MAP帧的长度，增大MAC周期内用来传输数据的传输时机的长度，从而提高各节点在每个MAC周期内传输业务信息的效率。
可选地，在一些可能的实施方式中，所述参数信息包括三个字段，分别用于标识节点标识、参数类型和参数值。
可选地，在一些可能的实施方式中，所述参数信息包括两个字段，分别用于标识节点标识和参数值，其中所述参数值所在的固定比特位置来标识参数值对应哪种参数类型。
可选地，在一些可能的实施方式中，所述参数信息包括比特加载表、前向纠错误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
可选地，在一些可能的实施方式中，所述计算方式包括加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法。
可选地，在一些可能的实施方式中，所述域主节点向域内所有普通节点广播发送节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述节点标识集合包括能唯一标识域内各节点的信息；所述域主节点根据所述节点列表消息来检验是否收集到了所有节点的参数信息。这样就可以保证每个节点能准确判断是否收集到了所有节点的参数信息，避免因遗漏某个节点的信息，而导致不同节点在计算节点顺序时出现不一致的情况。
第二方面，本申请实施例提供了一种电力线通信方法，该方法是从一个普通节点的角度进行描述，具体包括：
所述普通节点接收域主节点和其他普通节点发送的参数信息并保存；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
所述普通节点接收所述域主节点发送的策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
所述普通根据所述策略指示信息中的参数类别和计算方式计算出自己占用时隙的顺序；
所述普通按照计算出的顺序占用时隙发送数据。
利用本实施例的方案，不需要接收域主节点对每一个节点占用的时隙次序进行指示，减少了MAP帧的长度，增大MAC周期内用来传输数据的传输时机的长度，从而提高各节点(包括普通节点)在每个MAC周期内传输业务信息的效率。
可选地，在一些可能的实施方式中，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述所有普通节点包括所述普通和域内其他普通节点；所述普通根据所述节点列表消息来检验是否收集到了所有节点的参数信息。这样就可以保证每个普通节点能准确判断是否收集到了所有节点的参数信息，避免因遗漏某个节点的信息，而导致不同节点在计算节点顺序时出现不一致的情况。
第三方面，本申请实施例提供了一种电力线通信装置，作为一个域主节点，包括收发器、处理器和存储器，其中：
所述收发器用于向所有普通节点广播发送自身的参数信息，接收普通节点发送的参数信息并保存；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
所述存储器用于保存获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表；
所述收发器用于向域内所有普通节点广播发送策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
所述处理器用于根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
所述收发器还用于按照计算出的顺序占用时隙发送数据。
可选地，在一些可能的实施方式中，所述收发器用于向域内所有普通节点广播发送节点列表消息，所述节点列表消息包括所述域主节点和域内所有普通节点的节点标识集合；所述处理器还用于根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
第四方面，本申请实施例提供了一种电力线通信装置，作为一个普通节点，包括收发器、处理器和存储器，其中：
所述收发器用于接收域主节点和其他普通节点发送的参数信息；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
所述存储器用于保存获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表；
所述收发器用于接收所述域主节点发送的策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
所述处理器根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
所述收发器按照计算出的顺序占用时隙发送数据。
可选地，在一些可能的实施方式中，所述收发器还用于接收所述域主节点发送的节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述处理器还用于根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
第五方面，本申请实施例提供了一种电力线通信系统，包括一个上述的域主节点和至少一个上述的普通节点。
第六方面，本申请实施例提供一种芯片或者芯片系统，该芯片或者芯片系统包括至少一个处理器和通信接口，通信接口和至少一个处理器通过线路互联，至少一个处理器用于运行计算机程序或指令，以执行如上述第一方面或第一方面任意一种实施方式所述的方法，或执行如上述第二方面或第二方面任意一种实施方式所述的方法。
第七方面，本申请实施例提供一种计算机程序产品，该计算机程序产品包括计算机软件指令，该计算机软件指令可通过处理器进行加载来实现上述第一方面或第二方面中任意一项的方法中的流程。
从以上技术方案可以看出，本申请实施例具有以下优点：减少了MAP帧中时序指示信息的长度，增大MAC周期内用来传输数据的传输时机的比例，从而提高了每个MAC周期内传输业务信息的效率。
附图说明
图1为PLC网络结构示意图；
图2为PLC通信中一个MAC周期的结构示意图；
图3为PLC通信中MAP帧结构示意图；
图4为本发明实施例提供的一种时隙分配方法流程图；
图5为本发明实施例提供的电力线通信装置结构示意图；
图6为本申请实施例提供的另一种电力线通信装置结构示意图；
具体实施方式
PLC网络，也叫载波通信网络，是以电力线为通信媒介，实现电力用户用电信息汇聚、传输、交互的通信网络。一种示例性的PLC通信系统可具有图1所示架构。如图1所示，电力线通信系统可包括电力线、网关设备、多个电力线通信设备以及终端等用网设备。其中，电力线除了用于传输电流，用于驱动电器外。通过网关设备与互联网连接，电力线也能用于提供互联网的接入。电力线通信设备可包括网关侧电力线通信设备(例如图1所示的第一电力线通信设备)，网关侧电力线通信设备与网关设备连接。电力线通信设备还可包括用于向终端等用网设备提供网络信号的终端侧电力线通信设备(例如图1所示的第二电力线通信设备)。以上电力线通信设备具体可以是电力猫(modern)或其他类型的电力线通信调制解调器。
在从互联网向终端发送数据时，第一电力线通信设备可从网关设备接收来自于互联网的数据。第一电力线通信设备还可将来自网关的数据调制到PLC信号上并耦合到电力线，从而可利用电力线转发数据。第二电力线通信设备可用于将电力线传输的PLC信号进行解调以获得数据，并将解调后获得的数据通过无线等方式转发给终端，从而令终端等用户设备接收到来自互联网侧的数据。同理，图1所示系统也可以实现由终端向互联网侧的数据传输。
以上电力线通信设备具体可以是电力猫或其他类型的电力线通信调制解调器，本申请不予具体限定。
目前在如图1所示第一电力线通信设备和/或第二电力线通信设备进行数据发送时，由第一电力线通信设备和/或第二电力线通信设备将待发送的数据包承载于信号帧，并将信号调制为OFDM符号序列，进一步通过第一频带信号和/或第二频带信号发送该OFDM符号序列。相应地，接收端电力线通信设备在接收电力线中通过第一频带信号和/或第二频带信号传输的OFDM符号序列后，经过解调可获得信号帧，进一步可根据信号帧解析出数据包。
在进一步描述实施方式前，先对一些术语进行说明。本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换。此外，术语“包括”和“具有”以及他们的任何变形，并不限于“仅有”的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
目前的电力线通讯在协议设计上根据电力线的信道特点，把2个电力线的交流电(AC)周期作为协议通信的介质访问控制(medium access control，MAC)周期。如图2所示，1个MAC周期至少包含两部分时间段，一部分是用来传输MAP帧，一部分用来传输数据，传输数据的这部分时间段称为传输时机(transmission opportunity，TXOP)。TXOP有两种类型，分别是自由抢占传输时机(contention free TXOP,CFTXOP)和分享传输时机(share TXOP,STXOP)。其中，CFTXOP是电力线通信设备竞争接入的传输时间段，STXOP是主节点统一分配的传输时间段。
一般地，一个电力线网络区域内(比如一个网关下面的网络)的各电力线通信设备在网络分布上看是对等的，都可以称为节点。一个区域内的所有节点中存在一个域主节点(domain master,DM)，非DM节点可称为普通节点。域主节点通过媒质接入规划(medium access plan,MAP)帧为域内各电力线通信设备分配传输时隙(time slot,TS)；这样，在每个MAC周期内，所有节点(包括域主节点和普通节点)在自己的时隙内收发数据。需要说明的是，域主节点和普通节点在是根据各节点在实际运行中处理功能来划分的，他们在硬件或软件结构上可能相同，也可能不同。一般情况一个节点的角色不会改变，但在不同时期会有变化，比如在一个时期内承担域主节点角色的节点在另一个时期作为了普通节点，而其他一个普通节点承接了域主节点角色。图3示出了现有技术的MAP帧结构。一条MAP帧包括MAP头字段(MAP header)和至少一个传输时机描述信息(TXOP descriptor)字段。MAP头字段主要用于描述下一个MAC周期的信息，其中下一个MAC周期一般指发送MAP帧所在的MAC周期之后的一个MAC周期。对于下一个MAC周期中的STXOP，需要有多个TXOP descriptor字段来指示各节点占用STXOP的顺序，但对于CFTXOP，由于是各节点竞争抢占，不需要指示占用顺序，所以只需一个TXOP descriptor字段来描述。额外地，MAP帧还可以包括扩展字段(extension)，用于指示TXOP时隙的信息，比如起始时间、结束时间等。
由于现有技术中STXOP的时隙分配是由域主节点的数据带宽分配(data bandwidth assign,DBA)模块计算得到后，通过MAP帧把时隙分配的顺序信息统一发送给各个普通节点。对于STXOP，区域内有多少个节点，一个MAP帧内就必须要有多少个传输时机描述信息字段来指示各节点占用STXOP的顺序。由于MAC周期长度是固定的，如果域内节点越多，MAP帧长度就越长，这样一个MAC周期内真正用来分配给各节点传输数据的传输时机就越少。
本发明实施例提供一种传输资源分配方法，可以减少MAC周期内时隙指示信息的长度，增大用来传输数据的传输时机的长度，从而提高各节点在每个MAC周期内传输业务信息的效率。
如图4所示，该传输资源分配方法包括：
步骤S403，域主节点和任一普通节点，以及任一普通节点和其他普通节点之间交互自身的参数信息；具体包括：所述域主节点广播发送自身的参数信息，接收普通节点发送的参数信息；任一普通节点也广播发送自身的参数信息，接收其他节点发送的参数信息；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值。
其中在本文中，域内任一普通节点是指在域主节点所在的电力线网络区域内，除域主节点外的其他已成功注册的任一节点；所有普通节点是指域内所有的普通节点。另外，下文中的域内所有节点包括域主节点和域内所有普通节点，任一节点是指域内所有节点中的任意一个节点。
作为一种例子，所述参数信息包括用三个字段分别表示节点标识、参数类型和参数值；作为另一个例子，所述参数信息包括标识节点标识和参数值，而不包括参数类型指示字段，代替地，利用参数值所在的固定比特位置来区分，比如利用约定的前几位比特位表示的值对应的是一个参数类型，后面几个比特位表示的值对应的是另一个参数类型。所述域主节点和所有普通节点保存各自获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表。
这样任一节点都能获取到域内所有节点的参数信息，每个节点都可以将所有节点对应的参数信息都保存下来。为下文描述简洁，这里将域内所有节点的参数信息称为参数信息集合，形式可以如表格1所示，
表格1
节点标识 参数类型 参数值
节点1 参数A aa
节点2 参数B bb
节点3 参数C cc
其中，所述参数信息包括比特加载表(bit loading table，简称B表)、前向纠错(FEC)误码率、重传率、信道估计窗口的最大kp值/平均kp值(其中kp值是一个OFDM符号所能承载的总比特数)、平均发送速率、平均接收速率中的一种或多种。
步骤S405，所述域主节点向域内所有普通节点广播发送策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
所述计算方式可以是加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法等。
步骤S407，所述普通节点根据所述策略指示信息中指示的参数类别选取交互信息中的对应参数，利用选取的对应参数计算出所有节点占用时隙的顺序；所述域主节点也根据选取的对应参数和计算方式计算出所有节点占用时隙的顺序。
由于各个节点在步骤S403中已获取到了相同的参数信息集合，根据所述策略指示信息中指示的参数类别选取所有节点的这类参数，再根据所述策略指示信息中指示的计算方式对这类参数进行计算，获得整个域内所有节点占用时隙的顺序，就得到了自己节点是在第一个还是在哪几个节点之后占用时隙发送数据。
步骤S409，所述域主节点或所述普通节点按照计算出的顺序占用时隙发送数据。
由于每个节点都保存了域内所有节点的参数信息，每个节点获取的参数信息应该是一致，他们根据同样的参数和计算方式获得的各节点的时隙先后顺序也应该是一致的，所以各节点按照获得时隙先后顺序，在自己对应的时隙顺序发送数据不会发生冲突。
应理解，选择不同的参数类别或不同计算方式，会影响到各节点计算出的时隙顺序不同；换句话说，域主节点可以在不同时期根据需求或其他策略向所有普通节点广播发送不同策略指示信息，来调配不同的时隙顺序。作为一个具体实例，假设一个域内有三个节点：节点1、节点2和节点3，节点1作为域主节点可以在一个时期向两个普通节点广播发送策略指示信息1，如表格2所示，该策略指示信息携带的是参数类别A和计算方法A的指示，三个节点根据类别A的参数和计算方法A都能计算出时隙占用顺序是“123”。按照该计算结果，节点1先占用STXOP时隙发送数据；节点1发送完后，节点2接着占用STXOP时隙发送数据；节点2发送完后，节点3继续占用STXOP时隙发送数据。类似的，节点1作为域主节点可以在另一个时期向两个普通节点广播发送策略指示信息2。该策略指示信息携带的是参数类别B和计算方法B的指示，三个节点根据类别A的参数和计算方法A都能计算出时隙占用顺序是“132”；按照该计算结果，节点1先占用STXOP时隙发送数据；节点1发送完后，节点3接着占用STXOP时隙发送数据；节点3发送完后，节点2继续占用STXOP时隙发送数据。同理，节点1作为域主节点也可以在又一个时期向两个普通节点广播发送策略指示信息3，该策略指示信息携带的是参数类别C和计算方法C的指示，三个节点根据类别A的参数和计算方法A都能计算出时隙占用顺序是“321”,三个节点按照顺序“321”占用时隙发送数据。
表格2
策略指示信息编号 策略指示信息携带内容 各节点计算的时隙顺序
策略指示信息1 参数类别A+计算方法A 123
策略指示信息2 参数类别B+计算方法B 132
策略指示信息3 参数类别C+计算方法C 321
作为一种可选的实施方式，在步骤S403之前或者在S403之后，还包括如下步骤S401，
步骤S401，所述域主节点向域内所有普通节点广播发送节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述节点标识集合包括能唯一标识域内各节点的信息，例如设备标识码(ID)或MAC地址等信息。
这样，在步骤S403后，每个节点就可以根据接收到的节点列表消息来检验是否收集到了所有节点的参数信息。如果缺少了某个节点K的信息，可以广播发送消息指示节点K重新发送他的参数信息。
可选地，本实施例方法还进一步包括，当有域内已注册的普通节点离开域的时候，或者有新的普通节点在域内成功注册的时候，所述域主节点更新本地保存的域内节点列表，并向域内所有普通节点广播发送所述更新后的节点列表。
利用本发明实施例，MAP帧里描述一个STXOP就不需要携带指示每个节点时隙顺序的信息，而只用携带策略指示信息，减少了MAP帧的长度，就相应减少了MAP帧占用MAC周期的长度，增大MAC周期内用来传输数据的传输时机的长度，从而提高各节点在每个MAC周期内传输业务信息的效率。如果域内节点越多，MAP帧长度减少的比例就越大，各节点在每个MAC周期内传输业务信息的效率提升的越明显。进一步地，如果STXOP在未来一些周期内时隙顺序不会改变的话，可以不重复发送MAP帧，直到需要调整各节点的时序顺序的时候，再发送 MAP帧，进一步减少MAP占用MAC周期的长度和提高各节点在每个MAC周期内传输业务信息的效率。
作为一个具体实例，假如有3个节点，一个MAC周期里有4个STXOP，现有技术中的一个MAP帧(简称老MAP帧)里描述3个节点的时隙信息的TXOP descriptor字段需要96个字节，每个TXOP descriptor带3个TXOP extension(各占1个字节)，应用本发明实施例后一个MAP帧(简称新MAP帧)携带的策略指示信息只需要48个字节(即只需一个TXOP descriptor+一个TXOP extension)，缩减了48个字节。而老MAP帧的长度大概有123个字节，其中帧头占22个字节，辅助信息至少占5个字节，本发明实施例将老MAP帧减少了48个字节，即减少39％的长度。假设发送老MAP帧需要1ms，那么发送本发明实施例中发送每个MAP帧就只需要大概0.61ms，在每个MAC周期内就能给各节点多分配0.39ms的传输数据的时隙。
上述本申请提供的实施例中，从域主节点及普通节点分别所实现的功能的角度对本申请实施例提供的方法流程进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，该从域主节点及普通节点可以分别包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。从域主节点及普通节点中，上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
如图5所示，本申请实施例提供的一种电力线通信装置500可以包括收发器501、处理器502和存储器503，以上收发器501、处理器502和存储器503之间相互耦合。收发器501可用于支持该电力线通信装置500进行通信，例如能够通过电力线等通信介质进行数据帧的接收和/或发送；处理器501可用于对通信协议以及通信数据进行处理，以及对收发器501和存储器503进行控制，读取存储器503的数据，执行软件程序，处理软件程序的数据等。存储器502可用于存储指令(或称程序)和数据。
处理器502用于执行计算机指令，协同收发器501和存储器503，使所述该电力线通信装置500可用于执行以上方法实施例中由域主节点执行的步骤。具体包括：
所述收发器501可以用于向所有普通节点广播发送自身的参数信息，接收普通节点发送的参数信息并保存；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；所述存储器503用于保存获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表；
所述收发器501用于向域内所有普通节点广播发送策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
所述处理器503用于根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
所述收发器501用于按照计算出的顺序占用时隙发送数据。
作为一种可选实施例，所述收发器501用于向域内所有普通节点广播发送节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述处理器503还用于根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
在一种可能的设计中，所述参数信息包括B表、FEC误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
在另一种可能的设计中，所述计算方式可以是加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法等。
上述收发器501、处理器502和存储器503都是用于对PLC信号进行处理，所以所述电力线通信装置500还可以包括一个滤波器，用于过滤掉PLC信号以外的信号，提取出PLC信号后发送 给所述收发器501。
需要说明的是，本实施例中的电力线通信装置500是作为域主节点的角色，来执行图4对应的方法实施例的步骤，其中的细节描述也同样适用于本实施例中的收发器501、处理器502和存储器503系统执行的动作，在此不再赘述。
应理解，以上处理器501和存储器502可以构成一种通信芯片。另外，该芯片与通信接口503中耦合来进一步实现以上通信装置500的功能。
如图6所示，本申请实施例提供的一种电力线通信装置600可以包括收发器601、处理器602和存储器603，以上收发器601、处理器602和存储器603之间相互耦合。收发器601可用于支持该电力线通信装置600进行通信，例如能够通过电力线等通信介质进行数据帧的接收和/或发送；处理器601可用于对通信协议以及通信数据进行处理，以及对收发器601和存储器603进行控制，读取存储器603的数据，执行软件程序，处理软件程序的数据等。存储器602可用于存储指令(或称程序)和数据。
处理器602用于执行计算机指令，协同收发器601和存储器603，使所述该电力线通信装置500可用于执行以上方法实施例中由普通节点执行的步骤。具体包括：
所述收发器601用于接收所述域主节点和其他普通节点发送的参数信息；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；所述存储器603用于保存获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表。
所述收发器601用于接收所述域主节点发送的策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
所述处理器603根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
所述收发器601按照计算出的顺序占用时隙发送数据。
作为一种可选实施例，所述收发器601还用于接收域主节点发送的节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述处理器603还用于根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
在一种可能的设计中，所述参数信息包括B表、FEC误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
在另一种可能的设计中，所述计算方式可以是加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法等。
上述收发器601、处理器602和存储器603都是用于对PLC信号进行处理，所以所述电力线通信装置600还可以包括一个滤波器，用于过滤掉PLC信号以外的信号，提取出PLC信号后发送给所述收发器601。
需要说明的是，本实施例中的电力线通信装置600是作为普通节点的角色，来执行图4对应的方法实施例的步骤，其中的细节描述也同样适用于本实施例中的收发器601、处理器602和存储器603系统执行的动作，在此不再赘述。
应理解，以上处理器601和存储器602可以构成一种通信芯片。另外，该芯片与通信接口603中耦合来进一步实现以上通信装置600的功能。基于与上述方法实施例相同构思，本申请实施例中还提供一种计算机可读存储介质，其上存储有计算机程序，该程序被处理器执行时，使该计算机执行上述方法实施例、方法实施例的任意一种可能的实现方式中由发送端和/或接收端执行的方法。
基于与上述方法实施例相同构思，本申请还提供一种计算机程序产品，该计算机程序产 品在被计算机调用执行时，可以使得计算机实现上述方法实施例、方法实施例的任意一种可能的实现方式中由发送端和/或接收端执行的方法。
基于与上述方法实施例相同构思，本申请还提供一种芯片或芯片系统，该芯片可包括处理器。该芯片还可包括存储器(或存储模块)和/或通信接口(或通信模块)，或者，该芯片与存储器(或存储模块)和/或通信接口(或通信模块)耦合，其中，通信接口(或通信模块)可用于支持该芯片进行有线和/或无线通信，存储器(或存储模块)可用于存储程序，该处理器调用该程序可用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中由发送端和/或接收端执行的方法。该芯片系统可包括以上芯片，也可以包含上述芯片和其他分立器件，如存储器(或存储模块)和/或通信接口(或通信模块)。
基于与上述方法实施例相同构思，本申请还提供一种通信系统，该通信系统可包括以上图5和图6对应实施例中的电力线通信装置。该通信系统可用于实现上述方法实施例、方法实施例的任意一种可能的实现方式中涉及的方法。示例性的，该通信系统可具有如图1所示结构。其中，域主节点可以是图1所述电力线通信系统中的第一电力线通信设备，普通节点可以是图1所述电力线通信系统中的第二电力线通信设备。或者，域主节点可以是图1所述电力线通信系统中的第二电力线通信设备，普通节点可以是图1所述电力线通信系统中的第一电力线通信设备。
本申请实施例是参照实施例所涉及的方法、装置、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。

Claims (22)

  1. 一种电力线通信方法，其特征在于，包括：
    域主节点广播发送自身的参数信息，接收普通节点发送的参数信息并保存；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
    所述域主节点向域内所有普通节点广播发送策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
    所述域主节点根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
    所述域主节点按照计算出的顺序占用时隙发送数据。
  2. 根据权利要求1所述的方法，其特征在于，所述参数信息包括三个字段，分别用于标识节点标识、参数类型和参数值。
  3. 根据权利要求1或2所述的方法，其特征在于，所述参数信息包括两个字段，分别用于标识节点标识和参数值，其中所述参数值所在的固定比特位置来标识参数值对应哪种参数类型。
  4. 根据权利要求1至3任一所述的方法，其特征在于，所述参数信息包括比特加载表、前向纠错误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
  5. 根据权利要求1至3任一所述的方法，其特征在于，所述计算方式包括加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法。
  6. 根据权利要求1所述的方法，其特征在于，还包括：
    所述域主节点向域内所有普通节点广播发送节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述节点标识集合包括能唯一标识域内各节点的信息；
    所述域主节点根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
  7. 根据权利要求6所述的方法，其特征在于，当有域内已注册的普通节点离开域的时候，或者有新的普通节点在域内成功注册的时候，所述域主节点更新本地保存的域内节点列表，并向域内所有普通节点广播发送包括更新后的节点列表的节点列表消息。
  8. 一种电力线通信方法，其特征在于，包括：
    第一节点接收域主节点和其他普通节点发送的参数信息并保存；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
    所述第一节点接收所述域主节点发送的策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
    所述第一节点根据所述策略指示信息中的参数类别和计算方式计算出自己占用时隙的顺序；
    所述第一节点按照计算出的顺序占用时隙发送数据。
  9. 根据权利要求8所述的方法，其特征在于，所述参数信息包括三个字段，分别用于标识节点标识、参数类型和参数值。
  10. 根据权利要求8或9所述的方法，其特征在于，所述参数信息包括两个字段，分别用于标识节点标识和参数值，其中所述参数值所在的固定比特位置来标识参数值对应哪种参数类型。
  11. 根据权利要求8至10任一所述的方法，其特征在于，所述参数信息包括比特加载表、前向纠错误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
  12. 根据权利要求8至10任一所述的方法，其特征在于，所述计算方式包括加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法。
  13. 根据权利要求8所述的方法，其特征在于，还包括：
    所述第一节点接收所述域主节点发送的节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述所有普通节点包括所述第一节点和域内其他普通节点；
    所述第一节点根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
  14. 一种电力线通信装置，其特征在于，包括收发器501、处理器502和存储器503，其中：
    所述收发器501用于向所有普通节点广播发送自身的参数信息，接收普通节点发送的参数信息并保存；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
    所述存储器503用于保存获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表；
    所述收发器501用于向域内所有普通节点广播发送策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
    所述处理器503用于根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
    所述收发器501还用于按照计算出的顺序占用时隙发送数据。
  15. 根据权利要求14所述的装置，其特征在于，所述参数信息包括比特加载表、前向纠错误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
  16. 根据权利要求14或15所述的装置，其特征在于，所述计算方式包括加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法。
  17. 根据权利要求14所述的装置，其特征在于，所述收发器501用于向域内所有普通节点广播发送节点列表消息，所述节点列表消息包括所述域主节点和域内所有普通节点的节点标识集合；所述处理器503还用于根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
  18. 一种电力线通信装置，其特征在于，包括收发器601、处理器602和存储器603，其中：
    所述收发器601用于接收域主节点和其他普通节点发送的参数信息；所述参数信息至少能指示发送所述参数信息的节点的标识和所述参数的值；
    所述存储器603用于保存获得的参数信息，形成标识节点标识、参数类型和参数值的对应关系表；
    所述收发器601用于接收所述域主节点发送的策略指示信息，所述策略指示信息至少指示了一个用于计算时隙顺序的参数类别和计算方式；
    所述处理器603根据所述策略指示信息中的参数类别和计算方式计算出所述电力线通信装置占用时隙的顺序；
    所述收发器601按照计算出的顺序占用时隙发送数据。
  19. 根据权利要求18所述的装置，其特征在于，所述参数信息包括比特加载表、前向纠错误码率、重传率、信道估计窗口的最大kp值/平均kp值、平均发送速率、平均接收速率中的一种或多种。
  20. 根据权利要求18或19所述的装置，其特征在于，所述计算方式包括加权比例公平排序算法、轮询排序算法、按照信道质量由好到坏排序的贪心算法或其他排序算法。
  21. 根据权利要求18所述的装置，其特征在于，所述收发器601还用于接收所述域主节点发送的节点列表消息，所述节点列表消息包括域主节点和域内所有普通节点的节点标识集合；所述域内所有普通节点包括所述第一节点和域内其他普通节点；所述处理器603还用于根据所述节点列表消息来检验是否收集到了所有节点的参数信息。
  22. 一种电力线通信系统，包括域主节点和至少一个普通节点，其特征在于，所述域主节点为权利要求14至17任一所述的装置，普通节点为权利要求18至21任一所述的装置。
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