WO2022222571A1 - Qualified sub-carrier determination and aggregation method and apparatus for nodes of field domain network - Google Patents
Qualified sub-carrier determination and aggregation method and apparatus for nodes of field domain network Download PDFInfo
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Abstract
The embodiments of the present invention belong to the technical field of communications, and provide a qualified sub-carrier determination and aggregation method and apparatus for nodes of a field domain network. The method comprises: determining the availability of each sub-carrier between a first node and each neighbor node according to a signal-to-noise ratio of each sub-carrier between the first node and each neighbor node, and a signal-to-noise ratio threshold value; determining a reliability factor of each sub-carrier according to the availability of each sub-carrier between the first node and each neighbor node and a time of a period of each neighbor node sending a message; determining a set of reliability factors of the sub-carrier between the first node and each neighbor node; and taking an intersection set of the set of the reliability factors of the sub-carrier between the first node and each neighbor node, so as to obtain qualified sub-carriers of the first node. By means of the present invention, qualified sub-carriers can be determined, thereby improving the bandwidth of power line carrier communication, and the reliability of the power line carrier communication is also taken into consideration, thereby reducing the complexity of sub-carrier aggregation.
Description
场域网 的节点的 合格子载 波确定 、 聚合方法及装置 技术 领域 本发 明涉及通 信技术领 域，具体地 涉及一种 场域网 的节点的 合格子载 波 确定 、 聚合方法及装 置。 背景 技术 电力 设备场域 网为新兴 业务应用 ， 属于异构融合网 ， 场域网是以台区 智 能终 端为核心 ， 实现配电设备、 开关柜、 分支箱等骨 干节点 的自组织本 地通 信 网络， 形成配电台区 本地通信 骨干式 网络， 将配电设备采 集的电气 信息及 环境 信息通过 窄带电力 线载波及 无线传输 到智能 终端， 实现配电设备广 泛互 联、 信息深度采集以 及对配 电网的全面 感知和 数据融合 。 电力 线和无线 融合组 网在抄表等 营销业务 已开始得 到应用 ，载波采用 宽 带载 波通信方 式， 通信速率快 ， 但营销业务已经 占据大量带 宽， 新开展的配 电业 务通常采 用窄带载 波和无线 融合的 方式。采用 窄带电力 线载波和 无线融 合 的方式， 配网业务端 点到主站 的通信 往往要有 多跳完 成， 增加整个网络 的 连网 程度， 增加连接两 点的路 由的多样 性。 但是由于窄带 载波信道 较窄， 如 何考 虑和提高 载波技 术在信道 和通信 的可靠性 ，为最佳路 由选择提 供有效 的 评估 参数和决 策基础 ， 是一个难题。 窄带 载波通信 宽窄的特 性会影 响电力线 通信网络 的通信速 率和实 时性。 窄带 载波和 无线通 信可靠 性研究 主要从 物理层增 强和 网络路 由两个方 向展 开。 前者主要集中在信 道特性 、 噪声、 信源和信道编码、 信号调制解调方式 等方 面， 后者主要集 中在多级 中继路 由算法的 设计和改 进上。 载波 聚合， 通常用在 LTE、 LTE-Advanced系统中， 指两个以上 的载波， 通过 聚合方式 将多个 离散或者 连续的小 频带扩展 成更宽 的频带来传 输数据 ，
不仅 能加速标 准化进程 ， 还能最大限度 地利用 现有 LTE 设备和频谱资源 。 发明 内容 本发 明实施例 的目的 是提供一 种场域 网的节点 的合格子 载波确定 、聚合 方法 及装置 ， 该场域网的节点 的合格子 载波确定 、 聚合方法及装置 可以确 定 合格 子载波 ，提高电力线载 波通信 的带宽，并兼顾 电力线载波 通信的 可靠性 ， 降低 了子载波 聚合的 复杂程度 。 为了 实现上述 目的，本发 明实施例 提供一种 场域网 的节点的 合格子载 波 确定 方法， 该方法包括 ： 根据第一节点与 每个邻居 节点之 间的每个 子载波 的 信噪 比以及 信噪比阈 值，确定所述 第一节 点与每个 邻居节 点之间的 每个子载 波 的可用性 ； 根据所述第一节点 与每个邻 居节点之 间的每 个子载波 的可用性 以及 所述每个 邻居节 点发送消 息的周期 的时间 ，确定所述每 个子载 波的可靠 性 因子； 确定所述第一节 点与每 个邻居节 点之间 的子载波 的可靠性 因子的集 合 ；对所述第一 节点与每 个邻居节 点之间 的子载波 的可靠性 因子的 集合取交 集 ， 得到所述第一节 点的合格 子载波 。 优选 地，通过以 下公式确 定所述第 一节点 与每个邻 居节点之 间的每个 子 载波 的可用性 ：
D 为信 噪比阈值 。 优选 地， 通过以下公式 确定所 述每个子 载波的 可靠性因 子： FIELD OF THE INVENTION The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for determining and aggregating eligible subcarriers of a node of a field area network. BACKGROUND OF THE INVENTION Power equipment field area network is an emerging business application and belongs to a heterogeneous fusion network. The field area network is based on the intelligent terminal in the station area, and realizes a self-organized local communication network of backbone nodes such as power distribution equipment, switch cabinets, and branch boxes. Form a local communication backbone network in the distribution station area, and transmit the electrical information and environmental information collected by the distribution equipment to the intelligent terminal through the narrowband power line carrier and wireless, so as to realize the extensive interconnection of the distribution equipment, the in-depth collection of information, and the comprehensive analysis of the distribution network. Perception and data fusion. Power line and wireless converged networking have begun to be applied in marketing services such as meter reading. The carrier adopts broadband carrier communication, and the communication speed is fast, but the marketing business already occupies a large amount of bandwidth. The newly developed power distribution business usually adopts narrowband carrier and wireless convergence. Way. By adopting the method of narrowband power line carrier and wireless integration, the communication between the distribution network service endpoint and the main station often needs to be completed in multiple hops, which increases the degree of networking of the entire network and increases the diversity of routes connecting two points. However, because the narrowband carrier channel is relatively narrow, it is a difficult problem to consider and improve the reliability of the carrier technology in the channel and communication, and to provide effective evaluation parameters and decision-making basis for the optimal route selection. The wide and narrow characteristics of the narrowband carrier communication will affect the communication rate and real-time performance of the power line communication network. The research on narrowband carrier and wireless communication reliability mainly focuses on physical layer enhancement and network routing. The former mainly focuses on channel characteristics, noise, source and channel coding, signal modulation and demodulation methods, etc., while the latter mainly focuses on the design and improvement of multi-level relay routing algorithms. Carrier aggregation, usually used in LTE and LTE-Advanced systems, refers to two or more carriers, and multiple discrete or continuous small frequency bands are expanded into wider frequency bands through aggregation to transmit data, Not only can it speed up the standardization process, but it can also maximize the use of existing LTE equipment and spectrum resources. SUMMARY OF THE INVENTION The purpose of the embodiments of the present invention is to provide a method and apparatus for determining and aggregating qualified subcarriers of a node of a field area network, and the method and apparatus for determining and aggregating qualified subcarriers of a node of the field area network can determine qualified subcarriers, The bandwidth of the power line carrier communication is improved, and the reliability of the power line carrier communication is taken into account, and the complexity of the subcarrier aggregation is reduced. In order to achieve the above object, an embodiment of the present invention provides a method for determining a qualified subcarrier of a node of a field area network, the method comprising: according to the signal-to-noise ratio and the signal-to-noise ratio of each subcarrier between the first node and each neighbor node than the threshold, determine the availability of each subcarrier between the first node and each neighbor node; according to the availability of each subcarrier between the first node and each neighbor node and the each neighbor node sends The time of the period of the message, determine the reliability factor of each subcarrier; determine the set of reliability factors of the subcarrier between the first node and each neighbor node; for the first node and each neighbor node An intersection of sets of reliability factors of subcarriers between nodes is obtained to obtain qualified subcarriers of the first node. Preferably, the availability of each subcarrier between the first node and each neighbor node is determined by the following formula: D is the signal-to-noise ratio threshold. Preferably, the reliability factor of each subcarrier is determined by the following formula:
„ — Jo aABnkm (0 dt „ — Jo a AB n k m (0 dt
ABnkm rp ’
T 为第 Bnf邻居 节点发送 消息的周 期的时 间。 本发 明实施例 还提供 一种场域 网的子载 波聚合方 法， 该方法包括： 上文 所述 的场域 网的节点 的合格子 载波确定 方法； 针对每组互为 邻居节点 的多个 节点 ， 将合格子载波的 个数最 多的节点 作为簇首 节点以完 成分簇 ； 以所述簇 首节 点的合格 子载波 ， 由所述簇首节点控 制互为邻 居节点 的多个节 点进行载 波聚 合。 优选 地， 该方法还包括 ： 所述簇首节点以第 一预设周 期或检 测到通信 成 功率 低于阈值 时， 对互为邻居节 点的多个 节点进行 载波聚合 的重构 ； 或中心 节点 以第二预 设周期或 检测到 通信成功 率低于 阈值时，对所述 场域网 的节点 进行 分簇和载 波聚合 的重构 。 本发 明实施例 还提供 一种场域 网的节点 的合格子 载波确 定装置，该装 置 包括 ： 可用性确定单元 、 可靠性因子确 定单元、 集合确定 单元以及 交集确 定 单元 ， 其中， 所述可用性确定单 元用于根 据第一节 点与每 个邻居节 点之间 的 每个 子载波 的信噪 比以及信 噪比阈值 ，确定所述第 一节点 与每个邻 居节点之 间的 每个子载 波的可 用性； 所述可靠性 因子确定 单元用于 根据所述 第一节 点 与每 个邻居 节点之 间的每 个子载 波的可 用性以及 所述 每个邻居 节点发 送消 息 的周期的 时间， 确定所述每个 子载波 的可靠性 因子； 所述集合确 定单元用 于确 定所述第 一节点 与每个邻 居节点之 间的子 载波的可 靠性因子 的集合 ； 所 述交 集确定 单元用 于对所 述第一 节点与 每个邻 居节点之 间的子 载波的 可靠 性 因子的集 合取交集 ， 得到所述第一 节点的合 格子载波 。 优选 地，通过以 下公式确 定所述第 一节点 与每个邻 居节点之 间的每个 子 载波 的可用性:
性 ， SNR A^第 一节点 与第 Bn个邻居 节点之 间的第 km个子载波的信 噪比， D 为信 噪比阈值 。 优选 地， 通过以下公式 确定所 述每个子 载波的 可靠性因 子：
T 为第 Bnf邻居 节点发送 消息的周 期的时 间。 本发 明实施例 还提供 一种场域 网的子载 波聚合装 置， 其特征在于 ， 该装 置包 括： 上文所述的 场域网的 节点的合 格子载波 确定装 置； 分簇单元， 用于 针对 每组互为 邻居节点 的多个节 点，将合格 子载波 的个数最 多的节点 作为簇 首节 点以完成 分簇； 载波聚合 单元， 用于以所述 簇首节点 的合格子 载波， 由 所述 簇首节 点控制互 为邻居节 点的多个 节点进行 载波聚 合。 优选 地，所述载波 聚合单 元还用于 由所述簇 首节点 以第一预 设周期或 检 测到 通信成功 率低于 阈值时，对互 为邻居节 点的多个 节点进 行载波聚 合的重 构 ； 或所述分簇单元还用 于由集 中器中心 节点以第 二预设 周期或检 测到通信 成功 率低于 阈值时， 对所述场域 网的节点 进行分簇 ； 所述载波聚合单 元还用 于 由集中器 中心节点 以第二预 设周期或 检测到通 信成功 率低于 阈值时，对所 述场 域网的节 点进行载 波聚合 的重构 。 通过 上述技术 方案， 可以确定合 格子载波 ， 以基于电力设备 场域网 中电 力线 载波与无 线融合通 信的载 波聚合方 法， 提高电力线载 波通信 的带宽， 并 兼顾 电力线载 波通信 的可靠性 ； 基于优选子载波 的网络节 点分簇方 法， 并基
于节 点分簇进 行簇内 的子载波 聚合， 降低了子载波聚合 的复杂程 度。 本发 明实施 例的其 它特征 和优点 将在随 后的具 体实施 方式部分 予以详 细说 明。 附 图说明 附 图是用来提 供对本发 明实施例 的进一 步理解 ，并且构成说 明书的一 部 分 ， 与下面的具体实施 方式一起 用于解 释本发 明实施例 ， 但并不构成对本发 明实 施例的 限制。 在附图中： 图 1是本发明一实施 例提供 的场域网 的节点 的合格子 载波确定 方法的流 程 图； 图 2是本发明一 实施例提 供的场域 网的子 载波聚合 方法的 流程图； 图 3A-3B是本发 明一实施例 提供的 实现载波 聚合的数 字电路 的示意 图； 图 4是本发 明一实施 例提供 的场域网 的节点 的合格子 载波确定 装置的结 构框 图； 图 5是本发明一 实施例提 供的场域 网的子 载波聚合 装置的 结构框图 。 附 图标记说明 AB n k m rp ' T is the period of the B n f neighbor node sending the message. An embodiment of the present invention further provides a subcarrier aggregation method for a field area network, the method comprising: the above-mentioned method for determining qualified subcarriers of nodes in a field area network; for each group of multiple nodes that are neighbor nodes to each other, The node with the largest number of qualified subcarriers is used as the cluster head node to complete the clustering; using the qualified subcarriers of the cluster head node, the cluster head node controls multiple nodes that are neighbor nodes to each other to perform carrier aggregation. Preferably, the method further includes: the cluster head node performs carrier aggregation reconstruction on a plurality of nodes that are neighbor nodes with each other in a first preset period or when the communication success rate is detected to be lower than a threshold; or the central node uses In the second preset period or when it is detected that the communication success rate is lower than the threshold, the nodes of the field area network are reconstructed by clustering and carrier aggregation. An embodiment of the present invention further provides an apparatus for determining qualified subcarriers of a node of a field area network, the apparatus includes: an availability determination unit, a reliability factor determination unit, a set determination unit, and an intersection determination unit, wherein the availability determination unit uses for determining the availability of each subcarrier between the first node and each neighbor node according to the signal-to-noise ratio of each subcarrier and the signal-to-noise ratio threshold between the first node and each neighbor node; the reliability The factor determination unit is configured to determine the reliability factor of each subcarrier according to the availability of each subcarrier between the first node and each neighbor node and the period of time in which each neighbor node sends a message; The set determination unit is used to determine the set of reliability factors of subcarriers between the first node and each neighbor node; the intersection determination unit is used to determine the reliability factor between the first node and each neighbor node. An intersection of sets of reliability factors of subcarriers is obtained to obtain qualified subcarriers of the first node. Preferably, the availability of each subcarrier between the first node and each neighbor node is determined by the following formula: , SNR A ^ the signal-to-noise ratio of the k mth subcarrier between the first node and the B nth neighbor node, and D is the signal-to-noise ratio threshold. Preferably, the reliability factor of each subcarrier is determined by the following formula: T is the period of the B n f neighbor node sending the message. An embodiment of the present invention further provides an apparatus for subcarrier aggregation in a field area network, characterized in that the apparatus includes: the above-mentioned apparatus for determining eligible subcarriers of a node of the field area network; a clustering unit, configured for each Group multiple nodes that are neighbor nodes to each other, and use the node with the largest number of qualified subcarriers as the cluster head node to complete the clustering; the carrier aggregation unit is used to use the qualified subcarriers of the cluster head node. The first node controls multiple nodes that are neighbor nodes to each other to perform carrier aggregation. Preferably, the carrier aggregation unit is further configured to perform carrier aggregation reconstruction on a plurality of nodes that are neighbor nodes to each other by the cluster head node at a first preset period or when the communication success rate is detected to be lower than a threshold; Or the clustering unit is further configured to perform clustering on the nodes of the field area network by the central node of the concentrator at a second preset period or when the communication success rate is detected to be lower than a threshold; the carrier aggregation unit also uses When the central node of the concentrator detects that the communication success rate is lower than the threshold value at a second preset period, the nodes of the field area network are reconfigured for carrier aggregation. Through the above technical solution, qualified sub-carriers can be determined to improve the bandwidth of power line carrier communication based on the carrier aggregation method of power line carrier and wireless integrated communication in the power equipment field area network, and take into account the reliability of power line carrier communication; based on the preferred sub-carriers The network node clustering method of , and based on The sub-carrier aggregation within the cluster is performed by clustering the nodes, which reduces the complexity of the sub-carrier aggregation. Other features and advantages of embodiments of the present invention will be described in detail in the detailed description section that follows. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are used to provide further understanding of the embodiments of the present invention, constitute a part of the specification, and are used to explain the embodiments of the present invention together with the following specific embodiments, but do not limit the embodiments of the present invention. In the drawings: FIG. 1 is a flowchart of a method for determining qualified subcarriers of a node of a field area network provided by an embodiment of the present invention; FIG. 2 is a flowchart of a subcarrier aggregation method of a field area network provided by an embodiment of the present invention Fig. 3A-3B are schematic diagrams of a digital circuit for implementing carrier aggregation provided by an embodiment of the present invention; Fig. 4 is a structural block diagram of a device for determining qualified subcarriers of a node of a field area network provided by an embodiment of the present invention; Fig. 5 It is a structural block diagram of an apparatus for subcarrier aggregation in a field area network provided by an embodiment of the present invention. Description of reference numerals
1 可用性 确定单 元 2 可靠性 因子确定 单元 1 Availability determination unit 2 Reliability factor determination unit
3 集合确 定单元 4 交 集确定单 元 3 Set determination unit 4 Intersection determination unit
5 场域 网的节点 的合格子 载波确定 装置 5 Eligible subcarrier determination device for nodes of field area network
6 分簇单 元 7 载波聚 合单元 具体 实施方式 以下 结合附 图对本发 明实施例 的具体实 施方式进 行详细说 明。应当理解 的是 ， 此处所描述的具 体实施方 式仅用 于说明和 解释本发 明实施例 ， 并不用
于 限制本发 明实施例 。 图 1是本发明一实施 例提供 的场域网 的节点 的合格子 载波确定 方法的流 程 图。 如图 1所示， 该方法包括 ： 步骤 S11， 根据第一节点与每 个邻居节 点之间 的每个子 载波的信 噪比以 及信 噪比阈值 ，确定所述 第一节 点与每个 邻居节点 之间的每 个子载 波的可用 性 ； 例如 ， 场域网含有 多个节点 ， 当前以第一节 点 A为 例。 第一节点 A通 过接 收邻居 节点周期 性发送 来的 HELLO 消息来 确定本 与邻居 节点的连 通 性 ， 对于第一节点 A， 其与第 Bn个邻居节点间 有1 个子载波 ， 例如， 第一 节点 A， 与第 Bi个邻居节 点间有1^ 个子 载波， 与第 B2个邻居节点 间有 k2 个子 载波等 。 优选 地，通过以 下公式确 定所述第 一节点 与每个邻 居节点之 间的每个 子 载波 的可用性 ：
性 ， SNR ABnk^第一节点与第 Bn个邻居 节点之 间的第 km个子载波的信 噪比， D 为信 噪比阈值 。 步骤 S12, 根据所述第一 节点与 每个邻居 节点之 间的每个子 载波的 可用 性 以及所述 每个邻居 节点发送 消息的周 期的时 间，确定所述 每个子 载波的可 靠性 因子； 例如 ， 由于电力负荷的 时变性， 信道质量 不断变化 ， 因此需对各个子 载 波进 行评估 ， 计算出每个子载 波的可靠 性因子 。 优选 地， 通过以下公式 确定所 述每个子 载波的 可靠性因 子:
T 为第 Bnf邻居 节点发送 消息的周 期的时 间。 步骤 S13, 确定所述第一 节点与 每个邻居 节点之 间的子载波 的可靠 性因 子 的集合； 例如 ， 第一节点 A与 第：^个邻 居节点之 间的子 载波的可 靠性因 子的集 合可 以表示 为：
其 中， MB为第 一节点 A与第 ：^个邻居节 点之间的 子载波的 可靠性 因 子 的集合 。 第一节点 A与 其他邻 居节点之 间的子 载波的 可靠性 因子的集 合 slmkAB、 stinkAB2 ....
在此不再 赘述。 步骤 S14, 对所述第一节 点与每个 邻居节 点之间的 子载波的 可靠性 因子 的集 合取交集 ， 得到所述第 一节点的 合格子载 波。 例如 ， 可以表示为：
骤 S11-S14， 直到不是空集为止。 图 2是本发明一 实施例提 供的场 域网的子 载波聚合 方法的 流程图。如 图 2 所示， 该方法包括 ： 步骤 S21， 执行上文所述的场 域网的节 点的合格 子载波 确定方法;
例如 ， 可以得到各个 节点的合 格子载波 ； 步骤 S22, 针对每组互为邻 居节点 的多个节 点， 将合格子载波 的个数 最 多 的节点作为 簇首节 点以完成 分簇； 例如 ， 本发明采用无基 站的方式 ， 直接聚合多个 电力线信道 中的子 载波 实现 节点之 间的直接 通信。 在 PLC网络初始 化阶段 ， 所有邻居节点 之间通 过 HELLO 消息互相告 知其 Vnode值（即合格 子载波的 个数）， 通过节点之 间的 交互和 Vnode值比较 ， 选举出 Vnode值最大 的节点为簇 首。 依次类推， 网络 中所有节 点划分 为多个簇 ， 则由簇首节点控制 簇内成 员节点进行 载波聚 合 。 步骤 S23， 以所述簇首节点的 合格子载 波， 由所述簇首 节点控制 互为邻 居节 点的多个 节点进行 载波聚 合。 例如 ， 第一节点 A为 簇首节 点， 而｛Ml, M2, , Mn｝为成员节点。 簇首 节点 A采 用上文 所述 的方法 选出适 用于 本簇所 有节 点的合 格子载 波集合 Scluster。之后簇首节点 A将 合格子载 波集合 Scluster通知本簇所有节点， 本 簇 内统一采用 Scluster的子载波进行聚合。 图 3A-3B是本发 明一实施 例提供的 实现载波 聚合的数 字电路 的示意 图。 如 图 3A所示 ， 是载波聚合的发 送电路 ， 每一个处理支 路对应一 个分量载 波 的生 成。 为了能够将 多路数据 合并为一 路， 子载波分量 在完成基 带处理 后， 进行 数模转换 ， 最后通过和路产 生发送信 号， 并通过载波前 端耦合 电路发送 出去 。 其中基带处理器 部分包括 ： Turbo卷积编织、 信道交织、 调制、 IFFT、 循环 前缀以及 加窗。 如 图 3B所示 ， 是载波聚合的接 收电路 ， 接收端在收到 信号后通 过脉冲 噪声 消除、 数字前端 、 基带处理器等 实现信号 提取。 另外 ， 由于电力线载波 信道质量 存在多变 性特点 ， 故需要及时对所采 用 的合 格子载波 集进行 更新， 以应对信道情 况的变 化。 本发明提供 4种电力线
载波 聚合的系 统更新 的方式如 下: 所述 簇首节 点以第一 预设周期 或检测到 通信成 功率低于 阈值时，对互 为 邻居 节点的多 个节点进 行载波 聚合的重 构； 或中心节点以第 二预设周 期或检 测到 通信成功 率低于 阈值时，对所 述场域 网的节点进 行分簇 和载波聚 合的重 构 。 图 4是本发明一实施 例提供 的场域网 的节点 的合格子 载波确定 装置的 结 构框 图。 如图 4所示， 该装置包括： 可用性确定 单元 1、 可靠性因子确定单 元 2、 集合确定单元 3以及交集确 定单元 4， 其中， 所述可用性确定单 元 1 用于 根据第 一节点 与每个 邻居节 点之间 的每个 子载波 的信噪 比以及信 噪比 阈值 ， 确定所述第一节 点与每个 邻居节 点之间的 每个子载 波的可用 性； 所述 可靠 性因子确 定单元 2用于根据所 述第一节 点与每个 邻居节 点之间的 每个子 载波 的可用性 以及所 述每个邻 居节点发 送消息 的周期 的时间，确定 所述每个 子载 波的可靠 性因子 ； 所述集合确定单元 3用于确 定所述第 一节点与 每个邻 居节 点之间 的子载波 的可靠性 因子的集 合； 所述交集确定 单元 4用于 对所述 第一 节点与每 个邻居 节点之间 的子载波 的可靠性 因子的 集合取 交集，得到所 述第 一节点 的合格子 载波。 优选 地，通过以 下公式确 定所述第 一节点 与每个邻 居节点之 间的每个 子 载波 的可用性 ：
D 为信 噪比阈值 。 优选 地， 通过以下公式 确定所 述每个子 载波的 可靠性因 子:
T 为第 Bnf邻居 节点发送 消息的周 期的时 间。 图 5是本发明一 实施例提 供的场 域网的子 载波聚合 装置的 结构框 图。如 图 5所示， 其特征在于 ， 该装置包括： 场域网的节点 的合格 子载波确 定装置 5； 分簇单元 6, 用于针对每组互为邻 居节点的 多个节 点， 将合格子载波的 个 数最 多的节 点作为簇 首节点 以完成分簇 ； 载波聚合单元 7, 用于以所述簇 首 节点 的合格子 载波， 由所述簇首 节点控制 互为邻居 节点的 多个节点进 行载波 聚合 。 优选 地，所述载波 聚合单 元 7还用于 由所述簇 首节点 以第一预 设周期或 检测 到通信成 功率低 于阈值时 ，对互为邻居 节点的多 个节点进 行载波 聚合的 重构 ； 或所述分簇单元 6还用于由集 中器 中心节点 以第二预 设周期或 检测到 通信 成功率低 于阈值 时， 对所述场域网 的节点进行 分簇； 所述载波聚 合单元 7 还用于 由集中器 中心节点 以第二预 设周期或 检测到通 信成功 率低于 阈值时， 对所 述场域 网的节点进 行载波 聚合的重 构。 上文 所述的 场域网的 节点的合 格子载波 确定装 置、场域网 的子载波 聚合 装置 与上文 所述的场 域网的节 点的合 格子载波 确定方法 、场域网的 子载波聚 合方 法的实施 例类似 ， 在此不再赘述 。 还需 要说明的 是， 术语 “包括” 、 “包含” 或者其任 何其他变 体意在 涵 盖非 排他性 的包含， 从而使得包括一 系列要素 的过程 、 方法、 商品或者设备 不仅 包括那些 要素， 而且还包括 没有明 确列出 的其他要 素， 或者是还包括 为 这种 过程、 方法、 商品或者设 备所固有 的要素 。 在没有更多限制 的情况 下， 由语 句 “包括一个 ...... ” 限定的要素， 并不排除在包括要素的过程、 方法、
商品 或者设备 中还存在 另外的 相同要素 。 以上 仅为本 申请的实施 例而已 ， 并不用于限制本 申请。 对于本领域技 术 人员 来说， 本申请可以有 各种更 改和变化 。 凡在本申请的精 神和原理 之内所 作的 任何修 改、等同替换 、改进等，均应 包含在本 申请的权 利要求 范围之 内。
6 Clustering Unit 7 Carrier Aggregation Unit Specific implementations The specific implementations of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present invention, and do not to limit the embodiments of the present invention. FIG. 1 is a flowchart of a method for determining qualified subcarriers of a node of a field area network according to an embodiment of the present invention. As shown in FIG. 1 , the method includes: Step S11, according to the signal-to-noise ratio of each sub-carrier and the signal-to-noise ratio threshold between the first node and each neighbor node, determine the relationship between the first node and each neighbor node Availability of each subcarrier in between; for example, a field area network contains multiple nodes, and the first node A is currently taken as an example. The first node A determines the connectivity with the neighbor node by receiving the HELLO message periodically sent by the neighbor node. For the first node A, there is 1 subcarrier between it and the B nth neighbor node, for example, the first node A, there are 1^ subcarriers between the Bi th neighbor node, k 2 subcarriers and so on between the B 2 neighbor nodes. Preferably, the availability of each subcarrier between the first node and each neighbor node is determined by the following formula: , SNR ABnk ^ the signal-to-noise ratio of the k mth subcarrier between the first node and the B nth neighbor node, and D is the signal-to-noise ratio threshold. Step S12, according to the availability of each subcarrier between the first node and each neighbor node and the time of the period in which each neighbor node sends a message, determine the reliability factor of each subcarrier; for example, since The power load is time-varying and the channel quality is constantly changing, so each sub-carrier needs to be evaluated, and the reliability factor of each sub-carrier is calculated. Preferably, the reliability factor of each subcarrier is determined by the following formula: T is the period of the B n f neighbor node sending the message. Step S13, determining the set of reliability factors of subcarriers between the first node and each neighbor node; for example, the set of reliability factors of subcarriers between the first node A and the 2nd neighbor node It can be expressed as: Wherein, MB is the set of reliability factors of subcarriers between the first node A and the :th neighbor node. A set of reliability factors s lmkAB , s tinkAB2 . . . of sub-carriers between the first node A and other neighbor nodes. It is not repeated here. Step S14, taking the intersection of the set of reliability factors of subcarriers between the first node and each neighbor node, to obtain the qualified subcarriers of the first node. For example, can be expressed as: Steps S11-S14 until it is not an empty set. FIG. 2 is a flowchart of a method for subcarrier aggregation in a field area network according to an embodiment of the present invention. As shown in FIG. 2, the method includes: Step S21, executing the above-mentioned method for determining the qualified subcarriers of the nodes of the field area network; For example, the qualified subcarriers of each node can be obtained; in step S22, for each group of multiple nodes that are neighbor nodes to each other, the node with the largest number of qualified subcarriers is used as the cluster head node to complete the clustering; for example, the present invention adopts Without a base station, subcarriers in multiple power line channels are directly aggregated to realize direct communication between nodes. In the initialization phase of the PLC network, all neighboring nodes inform each other of their Vnode value (that is, the number of qualified subcarriers) through HELLO messages. Through the interaction between nodes and the comparison of the Vnode value, the node with the largest Vnode value is elected as the cluster head. . By analogy, all nodes in the network are divided into multiple clusters, and the cluster head node controls the member nodes in the cluster to perform carrier aggregation. Step S23: Using the qualified subcarriers of the cluster head node, the cluster head node controls multiple nodes that are neighbor nodes to each other to perform carrier aggregation. For example, the first node A is the cluster head node, and {M1, M2, , Mn} is the member node. The cluster head node A selects the qualified subcarrier set Scluster applicable to all nodes in the cluster using the method described above. Afterwards, the cluster head node A notifies all nodes in the cluster of the qualified subcarrier set Scluster, and the subcarriers of Scluster are uniformly used in the cluster for aggregation. 3A-3B are schematic diagrams of a digital circuit for implementing carrier aggregation provided by an embodiment of the present invention. As shown in FIG. 3A , it is a transmission circuit of carrier aggregation, and each processing branch corresponds to the generation of one component carrier. In order to combine multiple channels of data into one channel, the subcarrier components undergo digital-to-analog conversion after the baseband processing is completed, and finally generate a transmission signal through the sum channel, and send it out through the carrier front-end coupling circuit. The baseband processor part includes: Turbo convolution weaving, channel interleaving, modulation, IFFT, cyclic prefix and windowing. As shown in FIG. 3B , it is a receiving circuit of carrier aggregation. After receiving the signal, the receiving end realizes signal extraction through impulse noise cancellation, digital front end, baseband processor, and the like. In addition, due to the variability of the power line carrier channel quality, it is necessary to update the adopted set of qualified subcarriers in time to cope with changes in channel conditions. The present invention provides 4 kinds of power lines The system update method of carrier aggregation is as follows: the cluster head node performs carrier aggregation reconstruction on a plurality of nodes that are mutually neighbor nodes with a first preset period or when detecting that the communication success rate is lower than a threshold; or the central node Perform clustering and carrier aggregation reconstruction on the nodes of the field area network in a second preset period or when it is detected that the communication success rate is lower than the threshold. FIG. 4 is a structural block diagram of an apparatus for determining a qualified subcarrier of a node of a field area network according to an embodiment of the present invention. As shown in FIG. 4 , the apparatus includes: an availability determination unit 1, a reliability factor determination unit 2, a set determination unit 3, and an intersection determination unit 4, wherein the availability determination unit 1 is configured to determine according to the first node and each neighbor the signal-to-noise ratio of each sub-carrier between the nodes and the signal-to-noise ratio threshold, to determine the availability of each sub-carrier between the first node and each neighbor node; the reliability factor determination unit 2 is configured to The availability of each subcarrier between the first node and each neighbor node and the time of the period in which each neighbor node sends a message, determine the reliability factor of each subcarrier; the set determination unit 3 is used to determine A set of reliability factors of subcarriers between the first node and each neighbor node; the intersection determining unit 4 is used to determine the reliability factors of subcarriers between the first node and each neighbor node The intersection is obtained from the set of , and the qualified subcarriers of the first node are obtained. Preferably, the availability of each subcarrier between the first node and each neighbor node is determined by the following formula: D is the signal-to-noise ratio threshold. Preferably, the reliability factor of each subcarrier is determined by the following formula: T is the period of the B n f neighbor node sending the message. FIG. 5 is a structural block diagram of an apparatus for subcarrier aggregation in a field area network according to an embodiment of the present invention. As shown in FIG. 5, it is characterized in that the device includes: a device 5 for determining qualified subcarriers of nodes of the field area network; The node with the largest number of nodes is used as the cluster head node to complete the clustering; the carrier aggregation unit 7 is used for carrying the qualified subcarriers of the cluster head node, and the cluster head node controls the multiple nodes that are neighbor nodes to each other. polymerization. Preferably, the carrier aggregation unit 7 is further configured to perform carrier aggregation reconstruction on a plurality of nodes that are neighbor nodes to each other by the cluster head node at a first preset period or when the communication success rate is detected to be lower than a threshold or the clustering unit 6 is further configured to cluster the nodes of the field area network by the concentrator central node at a second preset period or when the communication success rate is detected to be lower than a threshold; the carrier aggregation unit 7 is further configured to perform carrier aggregation reconstruction on the nodes of the field area network by the central node of the concentrator in a second preset period or when the communication success rate is detected to be lower than the threshold. The above-mentioned device for determining qualified subcarriers of a node of a field area network, a subcarrier aggregation device for a field area network, and the above-mentioned method for determining qualified subcarriers of a node of a field area network, and subcarrier aggregation of the field area network Embodiments of the method are similar, and are not repeated here. It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes Other elements not expressly listed or otherwise inherent to such a process, method, commodity or apparatus. Without further limitation, an element qualified by the statement "comprises a..." does not exclude the inclusion of a process, method, There is another element of the same in the commodity or device. The above are only examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.
Claims
1、 一种场域 网的节点 的合格子 载波确 定方法 ， 其特征在于， 该方法包 括 ： 根据 第一节 点与每 个邻居 节点之 间的每 个子载波 的信 噪比以及 信噪 比 阈值 ， 确定所述第一 节点与每 个邻居节 点之间 的每个子 载波的可 用性； 根据 所述第 一节点 与每个 邻居节 点之间 的每个 子载波 的可用性 以及所 述每 个邻居节 点发送消 息的周 期的时 间，确定所述 每个子载 波的可 靠性因子; 确定 所述第 一节点与 每个邻居 节点之 间的子载波 的可靠 性因子 的集合； 对所 述第一 节点与 每个邻 居节点 之间的 子载波 的可靠性 因子 的集合取 交集 ， 得到所述第一 节点的合 格子载 波。 1. A method for determining a qualified subcarrier of a node of a field area network, characterized in that the method comprises: according to the signal-to-noise ratio and the signal-to-noise ratio threshold of each subcarrier between the first node and each neighbor node, determine Availability of each subcarrier between the first node and each neighbor node; according to the availability of each subcarrier between the first node and each neighbor node and the period at which each neighbor node sends a message time, determine the reliability factor of each subcarrier; determine the set of reliability factors of subcarriers between the first node and each neighbor node; determine the reliability factor between the first node and each neighbor node An intersection of sets of reliability factors of subcarriers is obtained to obtain qualified subcarriers of the first node.
2、 根据权利 要求 1所述的场域 网的节点 的合格 子载波确 定方法 ， 其特 征在 于， 通过以下公式确 定所述 第一节点 与每个邻 居节点 之间的每 个子载波 的可 用性：
D 为信 噪比阈值 。 2. The method for determining a qualified subcarrier of a node of a field area network according to claim 1, wherein the availability of each subcarrier between the first node and each neighbor node is determined by the following formula: D is the signal-to-noise ratio threshold.
3、 根据权利 要求 1所述的场域 网的节点 的合格 子载波确 定方法 ， 其特 征在 于， 通过以下公 式确定所 述每个 子载波 的可靠性 因子：
T 为第 Bnf邻居 节点发送 消息的周 期的时 间。 3. The method for determining a qualified subcarrier of a node of a field area network according to claim 1, wherein the reliability factor of each subcarrier is determined by the following formula: T is the period of the B n f neighbor node sending the message.
4、 一种场域 网的子载波 聚合方 法， 其特征在于 ， 该方法包括： 权利 要求 1-3中任一项权利要 求所述的 场域网 的节点的 合格子载 波确定 方法 的步骤 ； 以及 针对 每组互为 邻居节点 的多个节 点，将合格 子载波 的个数最 多的节点 作 为簇 首节点 以完成分 簇； 以所 述簇首节 点的合 格子载波 ， 由所述簇首节点控 制互为邻 居节点 的多 个节 点进行载 波聚合 。 4. A method for subcarrier aggregation in a field area network, wherein the method comprises: the steps of the method for determining qualified subcarriers of a node in a field area network according to any one of claims 1-3; and For each group of multiple nodes that are neighbor nodes to each other, the node with the largest number of qualified subcarriers is used as the cluster head node to complete the clustering; with the qualified subcarriers of the cluster head node, the cluster head node controls the mutual Carrier aggregation for multiple nodes of neighbor nodes.
5、 根据权利 要求 4所述的场域 网的子载 波聚合 方法， 其特征在 于， 该 方法 还包括 ： 所述 簇首节 点以第一 预设周期 或检测到 通信成 功率低于 阈值时，对互 为 邻居 节点的多 个节点进 行载波 聚合的重 构； 或 中心 节点以第 二预设周 期或检 测到通信 成功率低 于阈值 时，对所述场 域 网 的节点进行 分簇和 载波聚合 的重构 。 5. The method for subcarrier aggregation in a field area network according to claim 4, wherein the method further comprises: the cluster head node, at a first preset period or when detecting that the communication success rate is lower than a threshold Multiple nodes that are neighbor nodes to each other perform carrier aggregation reconstruction; or the central node performs clustering and carrier aggregation on the nodes of the field area network at a second preset period or when detecting that the communication success rate is lower than a threshold. Refactor.
6、 一种场域 网的节点 的合格子 载波确 定装置 ， 其特征在于， 该装置包 括 ： 可用 性确定 单元、 可靠性因子确 定单元 、集合确定 单元以及 交集确 定单 元 ， 其中， 所述 可用性 确定单 元用于 根据第 一节点 与每个 邻居节 点之间 的每个子 载波 的信噪 比以及信 噪比阈值 ，确定所述 第一节点 与每个邻 居节点 之间的每 个子 载波的可 用性； 所述 可靠性 因子确 定单元 用于根 据所述 第一节 点与每 个邻居 节点之 间
的每 个子载波 的可用 性以及所 述每个 邻居节点 发送消息 的周期 的时间，确定 所述 每个子 载波的可 靠性因子 ； 所述 集合确 定单元 用于确 定所述 第一节 点与每 个邻居 节点之 间的子载 波 的可靠性 因子的集 合； 所述 交集确 定单元 用于对 所述第 一节点 与每个 邻居节 点之间 的子载波 的可 靠性因 子的集合 取交集 ， 得到所述第一节 点的合 格子载波 。 6. An apparatus for determining qualified subcarriers of a node of a field area network, characterized in that the apparatus comprises: an availability determination unit, a reliability factor determination unit, a set determination unit and an intersection determination unit, wherein the availability determination unit uses for determining the availability of each subcarrier between the first node and each neighbor node according to the signal-to-noise ratio of each subcarrier and the signal-to-noise ratio threshold between the first node and each neighbor node; the reliability The factor determination unit is used to determine the relationship between the first node and each neighbor node according to the The availability of each subcarrier and the time of the period in which each neighbor node sends a message, determine the reliability factor of each subcarrier; the set determining unit is used to determine the relationship between the first node and each neighbor node. A set of reliability factors of subcarriers between the first node and each neighbor node; the intersection determining unit is configured to take the intersection of the set of reliability factors of subcarriers between the first node and each neighbor node, and obtain the first node's reliability factor set. Eligible subcarriers.
7、 根据权利 要求 6所述的场域 网的节点 的合格 子载波确 定装置 ， 其特 征在 于， 通过以下公式确 定所述 第一节点 与每个邻 居节点 之间的每 个子载波 的可 用性：
D 为信 噪比阈值 。 7. The device for determining a qualified subcarrier of a node of a field area network according to claim 6, wherein the availability of each subcarrier between the first node and each neighbor node is determined by the following formula: D is the signal-to-noise ratio threshold.
8、 根据权利 要求 6所述的场域 网的节点 的合格 子载波确 定装置 ， 其特 征在 于， 通过以下公 式确定所 述每个 子载波 的可靠性 因子： 8. The device for determining a qualified subcarrier of a node of a field area network according to claim 6, wherein the reliability factor of each subcarrier is determined by the following formula:
„ — Jo aABnkm (0 dt „ — Jo a AB n k m (0 dt
ABnkm 丁 ’
T 为第 Bnf邻居 节点发送 消息的周 期的时 间。 AB n k m ding' T is the period of the B n f neighbor node sending the message.
9、 一种场域 网的子载波 聚合装 置， 其特征在于 ， 该装置包括:
权利 要求 6-8中任一项权利要求 所述的 场域网 的节点的合 格子载 波确定 装置 ； 以及 分簇 单元， 用于针对每组 互为邻居 节点的 多个节点 ， 将合格子载波的 个 数最 多的节点 作为簇 首节点 以完成分簇 ； 载波 聚合单元 ， 用于以所述簇首 节点的合 格子载 波， 由所述簇首节 点控 制互 为邻居节 点的多个 节点进行 载波聚 合。 9. A subcarrier aggregation device for a field area network, characterized in that the device comprises: The device for determining the qualified subcarriers of the nodes of the field area network according to any one of claims 6-8; and a clustering unit, for each group of multiple nodes that are mutually neighbor nodes, The node with the largest number is used as the cluster head node to complete the clustering; the carrier aggregation unit is configured to use the qualified subcarriers of the cluster head node, and the cluster head node controls multiple nodes that are neighbor nodes to each other to perform carrier aggregation.
10、 根据权利要 求 9所述 的场域网 的子载波 聚合装置 ， 其特征在于 ， 所述 载波聚 合单元 还用于 由所述 簇首节 点以第 一预设周 期或检 测到通 信成 功率低 于阈值时 ， 对互为邻居节点的 多个节点 进行载波 聚合的 重构； 或 所述 分簇单 元还用 于由集 中器中 心节点 以第二 预设周期 或检测 到通信 成功 率低于 阈值时， 对所述场域 网的节 点进行分 簇； 所述 载波聚 合单元 还用于 由集中 器中心 节点以第 二预设 周期或 检测到 通信 成功率低 于阈值 时， 对所述场域网 的节点进 行载波聚 合的重 构。
10. The sub-carrier aggregation device of the field area network according to claim 9, wherein the carrier aggregation unit is further configured to be detected by the cluster head node at a first preset period or when the communication success rate is lower than When the threshold value is reached, perform carrier aggregation reconstruction on multiple nodes that are neighbor nodes to each other; or the clustering unit is also used by the central node of the concentrator to detect that the communication success rate is lower than the threshold value at a second preset period or lower than the threshold value. Clustering the nodes of the field area network; the carrier aggregation unit is further configured to perform clustering on the nodes of the field area network by the concentrator central node at a second preset period or when the communication success rate is detected to be lower than a threshold Reconstruction of carrier aggregation is performed.
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