WO2017148445A1 - 同步方法、节点装置及无线mesh网络系统 - Google Patents

同步方法、节点装置及无线mesh网络系统 Download PDF

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Publication number
WO2017148445A1
WO2017148445A1 PCT/CN2017/075784 CN2017075784W WO2017148445A1 WO 2017148445 A1 WO2017148445 A1 WO 2017148445A1 CN 2017075784 W CN2017075784 W CN 2017075784W WO 2017148445 A1 WO2017148445 A1 WO 2017148445A1
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node
delay information
synchronization
access signal
signal
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PCT/CN2017/075784
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English (en)
French (fr)
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鲁志兵
张庆利
余庆祥
沈谦
胡军
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海能达通信股份有限公司
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Publication of WO2017148445A1 publication Critical patent/WO2017148445A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others

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  • the present application relates to the field of wireless MESH networks, in particular, a synchronization method and node apparatus for a wireless MESH network and a wireless MESH network system including the node apparatus.
  • Wireless MESH networks are also known as "multi-hop" networks.
  • the core guiding principle of the wireless MESH network is to allow each node in the network to transmit and receive signals. Any wireless device node can act as both an AP and a router. Each node in the network can transmit and receive signals, each node. Both can communicate directly with one or more peer nodes.
  • the development of wireless MESH networks is in the ascendant, and the industry is proposing and developing various solutions. In this application, the MESH network can be understood in a broad sense.
  • Wireless MESH networks are divided into asynchronous networks and synchronous networks.
  • the synchronous MESH network has better network performance in practical applications.
  • frame boundary synchronization on a node is required.
  • external synchronization source assistance such as GPS/Beidou
  • the whole network synchronization is easier to implement, and the synchronization accuracy is also higher.
  • satellite signal coverage or poor signal quality will seriously affect the synchronization performance of the system.
  • the existing common synchronization technologies include beacon synchronization technology, that is, when an external synchronous clock source is not used, the network nodes only time stamp the special packet exchanges, and calculate the time difference between the local and upper nodes. This is synchronized.
  • the existing mature beacon synchronization technologies are:
  • NTP Network Time Protocol
  • It is mainly used for network nodes in the Internet that need to be synchronized. It is a software synchronization technology.
  • IEEE 1588 technology The main principle is to periodically synchronize the clocks of all nodes in the network through a synchronization signal, which is to realize the synchronization of the master clock of the network device through the combination of software and hardware.
  • the network When synchronizing between nodes by sending a synchronization signal, the network generally determines a master node.
  • the master node sends a synchronization signal, receives a synchronization signal from the node, and determines a local frame boundary according to the synchronization signal to achieve synchronization with the master node.
  • the transmission delay of the synchronization signal on the master node to the slave node is different, the frame boundary on the slave node is still biased, and high-precision synchronization between the nodes cannot be strictly guaranteed.
  • the present application discloses a synchronization method and a node device for a wireless MESH network, which can improve synchronization performance of a MESH network node.
  • a synchronization method for a wireless MESH network including:
  • the slave node detects a synchronization signal broadcast by the master node, and acquires a frame boundary locally;
  • the slave node detects delay information delivered by the master node
  • the slave node detects the delay information, adjusting the frame boundary according to the delay information, so as to implement synchronization with the master node.
  • the sending, by the slave node, the access signal to the primary node comprises: the slave node sending an access signal to the primary node according to the frame boundary.
  • a synchronization method for a wireless MESH network comprising:
  • the master node broadcasts a synchronization signal
  • the master node detects an access signal sent by the at least one slave node
  • the primary node estimates corresponding delay information according to the detected access signal
  • the master node broadcasts the delay information.
  • the method further includes: the master node setting at least one time-frequency resource for access by the at least one slave node, the at least one time-frequency resource having a respective time-frequency resource ID.
  • the detecting, by the master node, the access signal sent by the at least one slave node comprises: the master node traversing the at least one time-frequency resource to detect an access signal.
  • the broadcasting the delay information by the primary node includes: the primary node broadcasting the delay information and the corresponding time-frequency resource ID.
  • the estimating, by the primary node, the corresponding delay information according to the detected access signal comprises: the primary node estimating the corresponding delay information based on a local frame boundary thereof.
  • a node apparatus for a wireless MESH network including:
  • a synchronization signal detection module configured to detect a synchronization signal sent by the primary node, and acquire a frame boundary locally;
  • An access signal sending module configured to send an access signal to the primary node
  • a delay information detecting module configured to detect delay information delivered by the primary node
  • the synchronization module is configured to adjust the frame boundary according to the delay information when the delay information detecting module detects the delay information, thereby implementing synchronization between the node device and the master node.
  • the access signal sending module is configured to send an access signal to the primary node according to the frame boundary.
  • the delay information detecting module is configured to: after the access signal sending module sends the access to the primary node, continuously monitor a broadcast channel, and detect an access to send the access signal. Whether there is delay information sent by the primary node on the time-frequency resource.
  • a node apparatus for a wireless MESH network including:
  • a synchronization signal sending module for broadcasting a synchronization signal
  • An access signal detecting module configured to detect an access signal sent by the at least one slave node
  • a delay estimation module configured to estimate a corresponding delay information according to the access signal detected by the delay signal detecting module
  • a delay information sending module configured to broadcast the delay information.
  • the foregoing node device further includes a time-frequency resource module, configured to be used for the at least one At least one time-frequency resource accessed by the slave node, the at least one time-frequency resource having a respective time-frequency resource ID.
  • the access signal detection module is configured to: traverse the at least one time-frequency resource to detect an access signal.
  • the delay information sending module is configured to broadcast the delay information and the corresponding time-frequency resource ID.
  • the delay estimation module is configured to estimate the corresponding delay information according to the access signal detected by the delay signal detection module based on the local frame boundary.
  • a wireless MESH network system including the aforementioned node device.
  • a node apparatus for a wireless MESH network including:
  • a memory storing instructions for the processor to:
  • the frame boundary is adjusted according to the delay information, thereby implementing synchronization between the node device and the master node.
  • a node apparatus for a wireless MESH network including:
  • a memory storing instructions for the processor to:
  • the synchronization method and node apparatus can improve the synchronization performance of the MESH network node.
  • FIG. 1A, 1B and 1C illustrate a synchronization process for a wireless MESH network, in accordance with an embodiment of the present invention
  • Figure 1D shows the synchronization state after the synchronization process shown in Figures 1A-1C;
  • Figure 1E shows the signal timing of the synchronization process shown in Figures 1A-1C;
  • FIG. 1F illustrates a synchronization process for a wireless MESH network in accordance with another embodiment of the present invention
  • FIG. 1G illustrates a synchronization process for a wireless MESH network in accordance with another embodiment of the present invention
  • FIG. 2 illustrates a slave node method for wireless MESH network synchronization in accordance with another embodiment of the present invention
  • FIG. 3 illustrates a master node method for wireless MESH network synchronization according to another embodiment of the present invention
  • FIG. 4 illustrates a node device for a wireless MESH network, in accordance with an embodiment of the present invention
  • FIG. 5 illustrates a node device for a wireless MESH network in accordance with another embodiment of the present invention.
  • FIG. 6 illustrates a node device for a wireless MESH network in accordance with another embodiment of the present invention.
  • the present invention provides a two-way synchronization method for a wireless MESH network.
  • the synchronization of the wireless MESH network is realized by the two-way synchronization by using the primary node and the secondary node respectively to transmit signals, and the synchronization performance of the MESH network node can be significantly improved.
  • FIGS. 1A, 1B and 1C illustrate a synchronization process for a wireless MESH network in accordance with an embodiment of the present invention.
  • FIG. 1D shows the synchronization state after the synchronization process shown in FIGS. 1A-1C.
  • FIG. 1E shows the signal timing of the synchronization process shown in FIGS. 1A-1C.
  • a synchronization method of a wireless MESH network according to an embodiment of the present invention is described below with reference to FIGS. 1A-1E.
  • the master node in the first step, after determining that it is the source node, the master node broadcasts a synchronization signal according to the clock of the node.
  • system information can also be broadcast.
  • the slave node detects the synchronization signal sent by the master node to obtain the frame boundary on the respective node.
  • the slave node can also detect the broadcast signal to obtain system information. Due to the influence of the transmission delay, the frame boundary acquired at each slave node will be deviated, as shown by T1 and T2 in FIG. 1A.
  • the slave node in the second step, in order to further adjust the frame boundary on the slave node so as to be aligned with the frame boundary on the master node as much as possible, the slave node follows, for example, the frame boundary detected in the first step. According to the system information, each of them separately sends a discovery signal to the master node.
  • the master node detects the access signal sent by the slave node based on its local frame boundary and estimates the delay information (TA) of the transmission. For example, based on the local frame boundary of the primary node synchronization signal and detecting that the delay of the access signal transmitted from the node 1 is 2 times T1, the transmission delay of the slave node 1 can be estimated to be T1.
  • TA delay information
  • multiple time-frequency resources for access can be set and numbered.
  • the master node traverses all access time-frequency resources, and when the access signal is detected, estimates the TA.
  • the master node broadcasts the TA value and the corresponding access time-frequency resource ID.
  • the slave node After the slave node sends the access signal, it continuously monitors the broadcast channel, and detects whether there is a TA transmission on the access time-frequency resource of the access signal sent by the node until the timeout indicates failure.
  • the slave node adjusts the frame boundary obtained from the first step according to the TA to achieve accurate synchronization with the master node.
  • the slave node detects the SFN from the broadcast signal, updates its own local SFN, and synchronizes with the network.
  • FIG. 1D shows the synchronization state after the synchronization process shown in FIGS. 1A-1C.
  • the ultimate goal of two-way synchronization is that the local frame boundary on all nodes should be in a window centered on the frame boundary of the master node to achieve basic synchronization of the entire network.
  • the two-way synchronization technology reduces or eliminates the influence of transmission delay and improves the performance of synchronization.
  • FIG. 2 illustrates a slave node method for wireless MESH network synchronization in accordance with another embodiment of the present invention.
  • the slave node detects a synchronization signal broadcast by the master node, and acquires a frame boundary locally.
  • the slave node also detects the broadcast signal to obtain system information.
  • the slave node transmits an access signal to the master node.
  • the plurality of slave nodes independently transmit the access signals according to the system information.
  • the slave node transmits an access signal to the master node in accordance with a frame boundary.
  • the slave node detects the delay information delivered by the master node.
  • the slave node after the slave node sends the access to the master node, it continuously monitors the broadcast channel, and detects whether there is delay information sent by the master node on the access time-frequency resource of the sent access signal.
  • the frame boundary is adjusted according to the delay information, thereby achieving synchronization with the master node.
  • slave node 1 adjusts its local frame boundary according to delay T1
  • slave node 2 adjusts its local frame boundary according to delay T2 to achieve accurate synchronization with the master node.
  • the slave node can detect the SFN from the broadcast signal, update its own local SFN, and synchronize with the network.
  • 1F and 1G show schematic diagrams of transmitting synchronization signals from a node to complete synchronization.
  • the primary node cannot successfully detect the access signal sent by the secondary node every time, and the secondary node needs to send the access signal multiple times (maximum transmission). N times).
  • the master node transmits a synchronization signal.
  • the synchronization signal is detected from the node.
  • the slave node sends an access signal.
  • c is separated from b by a fixed time t
  • d is separated from a by a fixed time t.
  • the master node failed to detect the access signal.
  • the slave node sends an access signal.
  • the master node detects the access signal sent from the node.
  • d is separated from e by 2*T1.
  • the master node sends T1 to the slave node.
  • T1 is received from the node, and the frame boundary is corrected according to T1.
  • the slave node when the slave node is unable to successfully detect the system information including T1 every time when the noise/interference of the slave node is large, the slave node also needs to transmit the access signal multiple times.
  • the master node transmits a synchronization signal.
  • the synchronization signal is detected from the node.
  • the slave node sends an access signal.
  • c is separated from b by a fixed time t
  • d is separated from a by a fixed time t.
  • the master node detects the access signal.
  • d is separated from e by 2*T1.
  • the master node sends T1 to the slave node.
  • the slave node failed to detect the delay information.
  • the slave node sends an access signal.
  • the master node detects the access signal sent from the node.
  • d is separated from e by 2*T1.
  • the master node sends T1 to the slave node.
  • T1 is received from the node, and the frame boundary is corrected according to T1.
  • FIG. 3 illustrates a source node method for wireless MESH network synchronization in accordance with another embodiment of the present invention.
  • the master node After determining that it is the master node, the master node broadcasts a synchronization signal. In addition, the master node can also broadcast system information.
  • the master node detects an access signal transmitted by at least one slave node.
  • the master node sets at least one time-frequency resource for access by the at least one slave node, and each of the at least one time-frequency resource has a respective time-frequency resource ID.
  • the primary node traverses at least one time-frequency resource to detect an access signal.
  • the primary node estimates corresponding delay information based on the detected access signal.
  • the master node estimates the corresponding delay information based on its local frame boundary.
  • the master node broadcasts delay information. For example, according to an embodiment, the master node broadcasts the delay information and the corresponding time-frequency resource ID, so that the slave node that continuously listens to the broadcast channel can detect the delay information on the access time-frequency resource that sends the access signal.
  • FIG. 4 illustrates a node device for a wireless MESH network, in accordance with an embodiment of the present invention.
  • the node device 400 for the wireless MESH network may include a synchronization signal detection module 402, an access signal transmission module 404, a delay signal detection module 406, and a synchronization module 408.
  • the node device 400 can function as the aforementioned slave node.
  • the synchronization signal detection module 402 can be configured to detect a synchronization signal sent by the primary node and acquire a frame boundary locally. According to an embodiment, the synchronization signal detection module 402 can also detect the broadcast signal acquisition system information.
  • the access signal transmitting module 404 can be configured to send an access signal to the primary node. According to an embodiment, the access signal transmitting module 404 is configured to transmit an access signal to the primary node in accordance with a frame boundary. According to an embodiment, the access signal transmitting module 404 independently transmits a discovery signal to the master node according to the system information.
  • the delay information detecting module 406 can be configured to detect delay information delivered by the master node. According to an embodiment, the delay information detecting module 406 may be configured to: after the access signal sending module sends the access to the primary node, continuously monitor the broadcast channel, and detect whether there is a primary node on the access time-frequency resource that sends the access signal. Delay information sent.
  • the synchronization module 408 can be configured to adjust the frame boundary according to the delay information when the delay information detecting module detects the delay information, thereby implementing synchronization between the node device and the master node. According to an embodiment, the synchronization module 408 detects the SFN from the broadcast signal, updates its own local SFN, and synchronizes with the network.
  • the node apparatus 400 for the wireless MESH network may implement the synchronization method according to the inventive concept described above, and a description similar to the foregoing will not be repeated.
  • FIG. 5 illustrates a node device for a wireless MESH network in accordance with another embodiment of the present invention.
  • the node apparatus 500 for the wireless MESH network may include a synchronization signal sending module 502, an access signal detecting module 504, and a delay estimating module 506 to delay the information sending module 508.
  • the node device 500 can function as the aforementioned master node.
  • the sync signal transmitting module 502 can be used to broadcast a sync signal. According to an embodiment, after determining that the node is a source node, the synchronization signal sending module 502 broadcasts according to the clock of the node. Synchronization signal. In addition, the synchronization signal transmitting module 502 can also broadcast system information.
  • the access signal detection module 504 can be configured to detect an access signal transmitted by at least one slave node.
  • the node device 500 further includes a time-frequency resource module, configured to set at least one time-frequency resource for accessing by the at least one slave node, where the at least one time-frequency resource has a respective time-frequency resource ID.
  • the access signal detection module is configurable to traverse at least one time-frequency resource to detect an access signal.
  • the delay estimation module 506 is configured to estimate corresponding delay information according to the access signal detected by the delay signal detecting module. According to an embodiment, the delay estimation module may be configured to estimate the corresponding delay information according to the access signal detected by the delay signal detection module based on the local frame boundary.
  • the delay information sending module 508 can be used to broadcast delay information. According to an embodiment, the delay information sending module may be configured to broadcast delay information and a corresponding time-frequency resource ID.
  • the node apparatus 500 for the wireless MESH network may implement the synchronization method according to the inventive concept described above, and a description similar to the foregoing will not be repeated.
  • the wireless MESH network system may include the node device described above with reference to FIG. 4 as a slave node device, and may include the node device described above with reference to FIG. 5 as a master node device.
  • Such a wireless MESH network system can significantly improve the synchronization performance of network nodes.
  • FIG. 6 illustrates a node device for a wireless MESH network in accordance with an embodiment of the present invention.
  • a node device 600 for a wireless MESH network can include a processor 602, a memory 604, a transmitter 606, and a receiver 608.
  • Memory 604 can store instructions for processor 602 to perform operational processing.
  • Memory 604 memory 504 can include volatile or non-volatile memory such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM).
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read only memory
  • EPROM erasable programmable read only memory
  • the present invention is not limited to a programmable read only memory (PROM), a read only memory (ROM), and the like.
  • the processor 602 can invoke instructions stored in the memory 604 to perform related operations, such as controlling the transmitter 606 and the receiver 608 for signal transceiving and the like.
  • the memory 604 stores instructions for the processor 602 to: when the transmitter applies a different subcarrier to transmit signals to a plurality of receiving nodes in a time slot, allocating for the plurality of receiving nodes Each transmit power, and each of the allocated transmit powers is associated with a corresponding receiving node. It is easy to understand that the memory 604 can also store other operations for the processor 602 to perform in accordance with embodiments of the present invention. The instructions made are not repeated here.
  • the memory 604 stores instructions for the processor 602 to: broadcast a synchronization signal; detect an access signal transmitted by the at least one slave node; estimate an access signal detected by the delay signal detection module Corresponding delay information; broadcasting the delay information. It is easy to understand that the memory 604 can also store instructions for the processor 602 to perform other operations in accordance with embodiments of the present invention, and details are not described herein.
  • the technical solution of the embodiment of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a plurality of instructions.
  • a computing device which may be a personal computer, server, mobile terminal, or network device, etc.
  • modules may be distributed in the device according to the description of the embodiments, or the corresponding changes may be located in one or more devices different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.

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Abstract

本申请涉及用于无线MESH网络的同步方法和节点装置以及包括所述节点装置的无线MESH网络系统。根据本发明的方法，从节点检测主节点广播的同步信号，在本地获取帧边界，并向所述主节点发送接入信号。所述主节点检测所述至少一个从节点发送的接入信号、估计相应的时延信息并广播所述时延信息。所述从节点检测所述主节点下发的时延信息。如果所述从节点检测到所述时延信息，则根据所述时延信息调整所述帧边界，从而实现与所述主节点的同步。本申请的技术方案能够提升MESH网络节点的同步性能.

Description

同步方法、节点装置及无线MESH网络系统 技术领域
本申请涉及无线MESH网络领域，具体而言，用于无线MESH网络的同步方法和节点装置以及包括所述节点装置的无线MESH网络系统。
背景技术
无线MESH网络(无线网状网络)也称为“多跳(multi-hop)”网络。无线MESH网络的核心指导思想是让网络中的每个节点都可以发射和接收信号，任何无线设备节点都可以同时作为AP和路由器，网络中的每个节点都可以发射和接收信号，每个节点都可以与一个或者多个对等节点进行直接通信。无线MESH网络的发展正处于方兴未艾之中，业界正在提出和发展各种方案。在本申请中，MESH网络可在广义上理解。
无线MESH网络分为异步网络和同步网络。当网络密度和规模较大的时候，同步MESH网络在实际应用中具有更好的网路性能。在同步MESH网络中，要求节点上的帧边界同步。在有GPS/北斗等外部同步源辅助的情况下，全网同步较为容易实现，而且同步精度也比较高。但是在很多场景下，例如地下、丛林等情况下，卫星信号覆盖不到或者信号质量不好，就会严重影响系统的同步性能。
现有常用的同步技术包括信标同步技术，即在不采用外部同步时钟源的情况下，网络节点之间只在特殊的包交换中打上时间戳，计算本地和上级节点之间的时间差，以此达到同步。现有比较成熟的信标同步技术有：
NTP(Network Time Protocol)技术：主要用于互联网中需要同步的网络节点，是一种软件同步技术。
IEEE 1588技术：主要原理是通过一个同步信号周期性的对网络中所有节点的时钟进行同步，是通过软硬件结合的方式实现网络设备的主时钟同步。
以上两种技术通常用于有线通信，一些无线MESH网络同步的时候也会借 用以上这两种技术。不管哪种技术，一般都是采用软件时间戳，即在发送或者接收报文中填入同步信息，但是由于在发送或者接收报文时，受到处理器处理速度、操作系统工作方式等因素的影响，软时间戳与实际发送或者接收时间有一定的误差，严重影响同步精度。
在节点之间通过发送同步信号进行同步时，网络一般会确定一个主节点。主节点发送同步信号，从节点接收同步信号，并根据同步信号确定本地的帧边界，实现和主节点的同步。但是，由于主节点上的同步信号到从节点的传输时延不同，因此从节点上的帧边界仍然会有偏差，不能严格保证各节点之间的高精度同步。
因此，仍需改进无线MESH网络的同步。
在所述背景技术部分公开的上述信息仅用于加强对本发明的背景的理解，因此它可以包括不构成对本领域普通技术人员已知的现有技术的信息。
发明内容
本申请公开一种用于无线MESH网络的同步方法和节点装置，能够提升MESH网络节点的同步性能。
本发明的其他特性和优点将通过下面的详细描述变得显然，或部分地通过本发明的实践而习得。
根据本发明的一个方面，提供一种用于无线MESH网络的同步方法，包括：
从节点检测主节点广播的同步信号，在本地获取帧边界；
所述从节点向所述主节点发送接入信号；
所述从节点检测所述主节点下发的时延信息；
如果所述从节点检测到所述时延信息，则根据所述时延信息调整所述帧边界，从而实现与所述主节点的同步。
根据一实施例，所述从节点向所述主节点发送接入信号包括：所述从节点按照所述帧边界向所述主节点发送接入信号。
根据一实施例，所述从节点检测所述主节点下发的时延信息包括：所述从节点在向所述主节点发送所述接入之后，持续监听广播信道，检测发送所述接入信号的接入时频资源上是否有所述主节点下发的时延信息。
根据本发明的另一方面，提供一种用于无线MESH网络的同步方法，包括：
主节点广播同步信号；
所述主节点检测所述至少一个从节点发送的接入信号；
所述主节点根据检测到的接入信号估计相应的时延信息；
所述主节点广播所述时延信息。
根据一实施例，前述方法还包括：所述主节点设定用于所述至少一个从节点接入的至少一个时频资源，所述至少一个时频资源分别具有各自的时频资源ID。
根据一实施例，所述主节点检测所述至少一个从节点发送的接入信号包括：所述主节点遍历所述至少一个时频资源以检测接入信号。
根据一实施例，所述主节点广播所述时延信息包括：所述主节点广播所述时延信息和对应的所述时频资源ID。
根据一实施例，所述主节点根据检测到的接入信号估计相应的时延信息包括：所述主节点以其本地帧边界为基准，估计相应的时延信息。
根据本发明的另一方面，提供一种用于无线MESH网络的节点装置，包括：
同步信号检测模块，用于检测主节点发送的同步信号，在本地获取帧边界；
接入信号发送模块，用于向所述主节点发送接入信号；
时延信息检测模块，用于检测所述主节点下发的时延信息；
同步模块，用于在所述时延信息检测模块检测到所述时延信息时，根据所述时延信息调整所述帧边界，从而实现该节点装置与所述主节点的同步。
根据一实施例，所述接入信号发送模块配置为按照所述帧边界向所述主节点发送接入信号。
根据一实施例，所述时延信息检测模块配置为：在所述接入信号发送模块向所述主节点发送所述接入之后，持续监听广播信道，检测发送所述接入信号的接入时频资源上是否有所述主节点下发的时延信息。
根据本发明的另一方面，提供一种用于无线MESH网络的节点装置，包括：
同步信号发送模块，用于广播同步信号；
接入信号检测模块，用于检测所述至少一个从节点发送的接入信号；
时延估计模块，用于根据时延信号检测模块检测到的接入信号估计相应的时延信息；
时延信息发送模块，用于广播所述时延信息。
根据一实施例，前述节点装置还包括时频资源模块，用于设定用于所述至少一 个从节点接入的至少一个时频资源，所述至少一个时频资源分别具有各自的时频资源ID。
根据一实施例，所述接入信号检测模块配置为：遍历所述至少一个时频资源以检测接入信号。
根据一实施例，所述时延信息发送模块配置为广播所述时延信息和对应的所述时频资源ID。
根据一实施例，时延估计模块配置为：以本地帧边界为基准，根据时延信号检测模块检测到的接入信号，估计相应的时延信息。
根据本发明的另一方面，提供一种无线MESH网络系统，包括前述节点装置。
根据本发明的另一方面，提供一种用于无线MESH网络的节点装置，其特征在于，包括：
发射器；
接收器；
处理器；
存储器，存储用于所述处理器完成以下操作的指令：
检测主节点发送的同步信号，在本地获取帧边界；
向所述主节点发送接入信号；
检测所述主节点下发的时延信息；
在检测到所述时延信息时，根据所述时延信息调整所述帧边界，从而实现该节点装置与所述主节点的同步。
根据本发明的另一方面，提供一种用于无线MESH网络的节点装置，其特征在于，包括：
发射器；
接收器；
处理器；
存储器，存储用于所述处理器完成以下操作的指令：
广播同步信号；
检测所述至少一个从节点发送的接入信号；
根据时延信号检测模块检测到的接入信号估计相应的时延信息；
广播所述时延信息。
根据本发明实施例的同步方法和节点装置能够提升MESH网络节点的同步性能。
附图说明
通过参照附图详细描述其示例实施方式，本发明的上述和其它特征及优点将变得更加明显。
图1A、1B和1C示出根据本发明一实施方式的用于无线MESH网络的同步过程；
图1D示出图1A-1C所示的同步过程之后的同步状态；
图1E示出图1A-1C所示的同步过程的信号时序；
图1F示出根据本发明另一实施方式的用于无线MESH网络的同步过程；
图1G示出根据本发明另一实施方式的用于无线MESH网络的同步过程；
图2示出根据本发明另一实施方式的用于无线MESH网络同步的从节点方法；
图3示出根据本发明另一实施方式的用于无线MESH网络同步的主节点方法；
图4示出根据本发明一实施方式的用于无线MESH网络的节点装置；
图5示出根据本发明另一实施方式的用于无线MESH网络的节点装置。
[根据细则91更正 05.04.2017]　
图6示出根据本发明另一实施方式的用于无线MESH网络的节点装置。
具体实施例
现在将参考附图更全面地描述示例实施例。然而，示例实施例能够以多种形式实施，且不应被理解为限于在此阐述的实施例；相反，提供这些实施例使得本发明将全面和完整，并将示例实施例的构思全面地传达给本领域的技术人员。在图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
此外，所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。在下面的描述中，提供许多具体细节从而给出对本发明的实施例的充分理解。然而，本领域技术人员将意识到，可以实践本发明的技术方案而没有所述特定细节中的一个或更多，或者可以采用其它的方法、组元、材料、装置、步骤等。在其它情况下，不详细示出或描述公知结构、方法、装置、实现、材料或者操作以避免模糊本发明的各方面。
附图中所示的方框图仅仅是功能实体，不一定必须与物理上独立的实体相 对应。即，可以采用软件形式来实现这些功能实体，或在一个或多个软件硬化的模块中实现这些功能实体或功能实体的一部分，或在不同网络和/或处理器装置和/或微控制器装置中实现这些功能实体。
本发明提供一种用于无线MESH网络的双向同步方法。
根据本发明的构思，利用主节点和从节点分别发送信号，通过双向同步实现无线MESH网络的同步，能够显著提升MESH网络节点的同步性能。
下面参照附图描述根据本发明技术构思的示例实施方式。
图1A、1B和1C示出根据本发明一实施方式的用于无线MESH网络的同步过程。图1D示出图1A-1C所示的同步过程之后的同步状态。图1E示出图1A-1C所示的同步过程的信号时序。
下面参照图1A-1E描述根据本发明实施方式的无线MESH网络的同步方法。
如图1A和1E所示，第一步，在确定自己为主节点(source node)后，主节点根据本节点时钟，广播同步信号。另外，还可广播系统信息。
从节点检测主节点发送的同步信号，获得各自节点上的帧边界。
另外，从节点还可检测广播信号获得系统信息。由于传输延时的影响，每个从节点上此时获取的帧边界都会有所偏差，如图1A中的T1、T2所示。
如图1B和1E所示，第二步，为了进一步调整从节点上的帧边界，使之能够尽可能与主节点上的帧边界对齐，从节点按照例如第一步中检测到的帧边界，根据系统信息，各自独立发送接入(discovery)信号到主节点。
主节点以其本地帧边界为基准，检测从节点发送的接入信号，并估计出传输的时延信息(TA)。例如，以主节点同步信号本地帧边界为基准，检测从节点1发送的接入信号的延迟为2倍T1，则可估计出从节点1的传输时延为T1。
为了支持多个从节点同时接入，可设定多个用于接入的时频资源，并进行编号。主节点遍历所有的接入时频资源，当检测到接入信号后，估计TA。
如图1C和1E所示，第三步，主节点广播TA值和对应的接入时频资源ID。
从节点在发送接入信号之后，持续地监听广播信道，检测自己发送接入信号的接入时频资源上是否有TA下发，直到超时，则表示失败。
如果接收到TA信息，从节点根据TA调整从第一步中获取的帧边界，以实现和主节点的精准同步。
然后，从节点从广播信号中检测到SFN，更新自己本地SFN，与网络同步。
图1D示出图1A-1C所示的同步过程之后的同步状态。参见图1D，双向同步的最终目标是所有节点上的本地帧边界应该在以主节点的帧边界为中心的一个窗内，实现全网的基本同步。
相比单向同步技术，根据本发明实施方式的双向同步技术减少或消除了传输时延的影响，提升了同步的性能。
图2示出根据本发明另一实施方式的用于无线MESH网络同步的从节点方法。
参见图1A-1E，如图2所示，在S202，从节点检测主节点广播的同步信号，在本地获取帧边界。
根据一实施例，从节点还检测广播信号以获得系统信息。
在S204，从节点向主节点发送接入信号。
根据一实施例，多个从节点根据系统信息，各自独立发送接入信号。
根据另一实施例，从节点按照帧边界向主节点发送接入信号。
在S206，从节点检测主节点下发的时延信息。
根据一实施例，从节点在向主节点发送接入之后，持续监听广播信道，检测发送接入信号的接入时频资源上是否有主节点下发的时延信息。
在S208，判断是否检测到时延信息。如果检测到时延信息，则转到S210；否则，转到S212。
在S210，根据时延信息调整帧边界，从而实现与主节点的同步。
例如，参见图1C，从节点1根据时延T1调整其本地帧边界，而从节点2根据时延T2调整其本地帧边界，以实现和主节点的精准同步。这之后，从节点可从广播信号中检测到SFN，更新自己本地SFN，与网络同步。
在S212，判断是否超时。没有超时，则转到S206，继续检测主节点下发的时延信息；否则，表示检测失败，转到S214。
在S214，判断失败次数是否超过预定次数N。如果没有超过预定次数N，则转到S204，向主节点发送接入信号。
图1F和1G示出了从节点发送多次接入信号完成同步的示意图。
在图1F的场景中，例如，当主节点接收机噪声/干扰较大时，主节点无法每次都成功检测从节点发送的接入信号，此时需要从节点多次发送接入信号(最多发送N次)。
参见图1F，在时间点a，主节点发送同步信号。
在时间点b，从节点检测到同步信号。
在第一个时间点c，从节点发送接入信号。c与b相隔固定时间t，d与a相隔固定时间t。
主节点检测接入信号失败。
在第二个时间点c，从节点发送接入信号。
在第二个时间点e，主节点检测到从节点发送的接入信号。d与e间隔2*T1。
在时间点f，主节点将T1发送给从节点。
在时间点g，从节点接收到T1，根据T1校正帧边界。
在图1G的场景中，例如，当从节点接收机噪声/干扰较大时，从节点无法每次都成功检测包含T1的系统信息时，也需要从节点多次发送接入信号。
参见图1G，在时间点a，主节点发送同步信号。
在时间点b，从节点检测到同步信号。
在时间点c，从节点发送接入信号。c与b相隔固定时间t，d与a相隔固定时间t。
在第一个时间点e，主节点检测到接入信号。d与e间隔2*T1。
在第一个时间点f，主节点将T1发送给从节点。
从节点检测时延信息失败。
在第二个时间点c，从节点发送接入信号。
在第二个时间点e，主节点检测到从节点发送的接入信号。d与e间隔2*T1。
在第二个时间点f，主节点将T1发送给从节点。
在时间点g，从节点接收到T1，根据T1校正帧边界。
图3示出根据本发明另一实施方式的用于无线MESH网络同步的源节点方法。
参见图1A-1E，如图3所示，在S302，在确定其为主节点后，主节点广播同步信号。另外，主节点还可广播系统信息。
在S304，主节点检测至少一个从节点发送的接入信号。
根据一实施例，主节点设定用于至少一个从节点接入的至少一个时频资源，至少一个时频资源分别具有各自的时频资源ID。
根据另一实施例，主节点遍历至少一个时频资源以检测接入信号。
在S306，主节点根据检测到的接入信号估计相应的时延信息。根据一实施例，主节点以其本地帧边界为基准，估计相应的时延信息。
在S308，主节点广播时延信息。例如，根据一实施例，主节点广播时延信息和对应的时频资源ID，从而持续监听广播信道的从节点可检测到发送接入信号的接入时频资源上的时延信息。
图4示出根据本发明一实施方式的用于无线MESH网络的节点装置。
如图4所示，用于无线MESH网络的节点装置400可包括同步信号检测模块402、接入信号发送模块404、时延信号检测模块406及同步模块408。节点装置400可作为前述的从节点。
同步信号检测模块402可用于检测主节点发送的同步信号，在本地获取帧边界。根据一实施例，同步信号检测模块402还可检测广播信号获得系统信息。
接入信号发送模块404可用于向主节点发送接入信号。根据一实施例，接入信号发送模块404配置为按照帧边界向主节点发送接入信号。根据一实施例，接入信号发送模块404根据系统信息独立发送接入(discovery)信号到主节点。
时延信息检测模块406可用于检测主节点下发的时延信息。根据一实施例，时延信息检测模块406可配置为：在接入信号发送模块向主节点发送接入之后，持续监听广播信道，检测发送接入信号的接入时频资源上是否有主节点下发的时延信息。
同步模块408可用于在时延信息检测模块检测到时延信息时，根据时延信息调整帧边界，从而实现该节点装置与主节点的同步。根据一实施例，同步模块408从广播信号中检测到SFN，更新自己本地SFN，与网络同步。
用于无线MESH网络的节点装置400可实现前面描述的根据本申请发明构思的同步方法，与前述类似的说明不再赘述。
图5示出根据本发明另一实施方式的用于无线MESH网络的节点装置。
如图5所示，用于无线MESH网络的节点装置500可包括同步信号发送模块502、接入信号检测模块504、时延估计模块506及时延信息发送模块508。节点装置500可作为前述的主节点。
同步信号发送模块502可用于广播同步信号。根据一实施例，在确定节点为主节点(source node)后，同步信号发送模块502根据本节点时钟，广播 同步信号。另外，同步信号发送模块502还可广播系统信息。
接入信号检测模块504可用于检测至少一个从节点发送的接入信号。
根据一实施例，节点装置500还包括时频资源模块，用于设定用于至少一个从节点接入的至少一个时频资源，至少一个时频资源分别具有各自的时频资源ID。
根据一实施例，接入信号检测模块可配置为遍历至少一个时频资源以检测接入信号。
时延估计模块506可用于根据时延信号检测模块检测到的接入信号估计相应的时延信息。根据一实施例，时延估计模块可配置为以本地帧边界为基准，根据时延信号检测模块检测到的接入信号，估计相应的时延信息。
时延信息发送模块508可用于广播时延信息。根据一实施例，时延信息发送模块可配置为广播时延信息和对应的时频资源ID。
用于无线MESH网络的节点装置500可实现前面描述的根据本申请发明构思的同步方法，与前述类似的说明不再赘述。
根据本发明的一实施方式的无线MESH网络系统可包括前述参照图4描述的节点装置，作为从节点装置，并可包括前述参照图5描述的节点装置，作为主节点装置。这样的无线MESH网络系统能够显著提升网络节点的同步性能。
图6示出根据本发明一实施方式的用于无线MESH网络的节点装置。
如图6所示，用于无线MESH网络的节点装置600可包括处理器602、存储器604、发射器606及接收器608。
存储器604可存储用于处理器602执行操作处理的指令。存储器604存储器504可包括易失性或非易失性存储器，如静态随机存取存储器(SRAM)、电可擦除可编程只读存储器(EEPROM)、可擦除可编程只读存储器(EPROM)、可编程只读存储器(PROM)、只读存储器(ROM)等，本发明对此没有限制。
处理器602可调用存储器604中存储的指令执行相关操作，如控制发射器606和接收器608进行信号收发等。
根据一实施例，存储器604存储用于处理器602完成以下操作的指令：当所述发射器在一时隙应用不同子载波向多个接收节点发射信号时，分配用于所述多个接收节点的各发射功率，且分配的各发射功率与相应接收节点相关。易于理解，存储器604还可存储用于处理器602完成根据本发明实施例的其他操 作的指令，这里不再赘述。
根据另一实施例，存储器604存储用于处理器602完成以下操作的指令：广播同步信号；检测所述至少一个从节点发送的接入信号；根据时延信号检测模块检测到的接入信号估计相应的时延信息；广播所述时延信息。易于理解，存储器604还可存储用于处理器602完成根据本发明实施例的其他操作的指令，这里不再赘述。
通过以上的实施例的描述，本领域的技术人员易于理解，本发明实施例的方法和相应模块可以通过软件或部分软件硬化的方式来实现。因此，本发明实施例的技术方案可以以软件产品的形式体现出来，该软件产品可以存储在一个非易失性存储介质(可以是CD-ROM，U盘，移动硬盘等)中，包括若干指令用以使得一台计算设备(可以是个人计算机、服务器、移动终端、或者网络设备等)执行根据本发明实施例的方法。
本领域技术人员可以理解，附图只是示例实施例的示意图，附图中的模块或流程并不一定是实施本发明所必须的，因此不能用于限制本发明的保护范围。
本领域技术人员可以理解上述各模块可以按照实施例的描述分布于装置中，也可以进行相应变化位于不同于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个模块，也可以进一步拆分成多个子模块。
以上具体地示出和描述了本发明的示例性实施例。应该理解，本发明不限于所发明的实施例，相反，本发明意图涵盖包含在所附权利要求的精神和范围内的各种修改和等效布置。

Claims (19)

  1. 一种用于无线MESH网络的同步方法，其特征在于，包括：
    从节点检测主节点广播的同步信号，在本地获取帧边界；
    所述从节点向所述主节点发送接入信号；
    所述从节点检测所述主节点下发的时延信息；
    如果所述从节点检测到所述时延信息，则根据所述时延信息调整所述帧边界，从而实现与所述主节点的同步。
  2. 如权利要求1所述的同步方法，其特征在于，所述从节点向所述主节点发送接入信号包括：所述从节点按照所述帧边界向所述主节点发送接入信号。
  3. 如权利要求1所述的同步方法，其特征在于，所述从节点检测所述主节点下发的时延信息包括：所述从节点在向所述主节点发送所述接入之后，持续监听广播信道，检测发送所述接入信号的接入时频资源上是否有所述主节点下发的时延信息。
  4. 一种用于无线MESH网络的同步方法，其特征在于，包括：
    主节点广播同步信号；
    所述主节点检测所述至少一个从节点发送的接入信号；
    所述主节点根据检测到的接入信号估计相应的时延信息；
    所述主节点广播所述时延信息。
  5. 如权利要求4所述的同步方法，其特征在于，还包括：所述主节点设定用于所述至少一个从节点接入的至少一个时频资源，所述至少一个时频资源分别具有各自的时频资源ID。
  6. 如权利要求5所述的同步方法，其特征在于，所述主节点检测所述至少一个从节点发送的接入信号包括：所述主节点遍历所述至少一个时频资源以检测接入信号。
  7. 如权利要求6所述的同步方法，其特征在于，所述主节点广播所述时延信息包括：
    所述主节点广播所述时延信息和对应的所述时频资源ID。
  8. 如权利要求4所述的同步方法，其特征在于，所述主节点根据检测到的接入信号估计相应的时延信息包括：所述主节点以其本地帧边界为基准，估计相应的时 延信息。
  9. 一种用于无线MESH网络的节点装置，其特征在于，包括：
    同步信号检测模块，用于检测主节点发送的同步信号，在本地获取帧边界；
    接入信号发送模块，用于向所述主节点发送接入信号；
    时延信息检测模块，用于检测所述主节点下发的时延信息；
    同步模块，用于在所述时延信息检测模块检测到所述时延信息时，根据所述时延信息调整所述帧边界，从而实现该节点装置与所述主节点的同步。
  10. 如权利要求9所述的节点装置，其特征在于，所述接入信号发送模块配置为按照所述帧边界向所述主节点发送接入信号。
  11. 如权利要求9所述的节点装置，其特征在于，所述时延信息检测模块配置为：在所述接入信号发送模块向所述主节点发送所述接入之后，持续监听广播信道，检测发送所述接入信号的接入时频资源上是否有所述主节点下发的时延信息。
  12. 一种用于无线MESH网络的节点装置，其特征在于，包括：
    同步信号发送模块，用于广播同步信号；
    接入信号检测模块，用于检测所述至少一个从节点发送的接入信号；
    时延估计模块，用于根据时延信号检测模块检测到的接入信号估计相应的时延信息；
    时延信息发送模块，用于广播所述时延信息。
  13. 如权利要求12所述的节点装置，其特征在于，还包括时频资源模块，用于设定用于所述至少一个从节点接入的至少一个时频资源，所述至少一个时频资源分别具有各自的时频资源ID。
  14. 如权利要求13所述的节点装置，其特征在于，所述接入信号检测模块配置为：遍历所述至少一个时频资源以检测接入信号。
  15. 如权利要求14所述的节点装置，其特征在于，所述时延信息发送模块配置为广播所述时延信息和对应的所述时频资源ID。
  16. 如权利要求12所述的节点装置，其特征在于，时延估计模块配置为：以本地帧边界为基准，根据时延信号检测模块检测到的接入信号，估计相应的时延信息。
  17. 一种无线MESH网络系统，其特征在于，包括：
    如权利要求9-11任一项所述的节点装置，作为从节点装置；及
    如权利要求12-16任一项所述的节点装置，作为主节点装置。
  18. 一种用于无线MESH网络的节点装置，其特征在于，包括：
    发射器；
    接收器；
    处理器；
    存储器，存储用于所述处理器完成以下操作的指令：
    检测主节点发送的同步信号，在本地获取帧边界；
    向所述主节点发送接入信号；
    检测所述主节点下发的时延信息；
    在检测到所述时延信息时，根据所述时延信息调整所述帧边界，从而实现该节点装置与所述主节点的同步。
  19. 一种用于无线MESH网络的节点装置，其特征在于，包括：
    发射器；
    接收器；
    处理器；
    存储器，存储用于所述处理器完成以下操作的指令：
    广播同步信号；
    检测所述至少一个从节点发送的接入信号；
    根据时延信号检测模块检测到的接入信号估计相应的时延信息；
    广播所述时延信息。
PCT/CN2017/075784 2016-03-04 2017-03-06 同步方法、节点装置及无线mesh网络系统 WO2017148445A1 (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113794547A (zh) * 2021-08-16 2021-12-14 中科苏州微电子产业技术研究院 一种多路信号同步方法、系统、电子设备及计算机可读存储介质
CN115278705A (zh) * 2020-07-10 2022-11-01 展讯半导体(成都)有限公司 通信时序规划方法、装置、相关设备、存储介质及系统

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105792346A (zh) * 2016-03-04 2016-07-20 海能达通信股份有限公司 同步方法、节点装置及无线mesh网络系统
GB2554638B (en) * 2016-09-28 2019-12-04 Advanced Risc Mach Ltd Error detection in communication networks
WO2018068180A1 (zh) * 2016-10-10 2018-04-19 海能达通信股份有限公司 主节点、从节点以及同步信息自校正方法
CN106455038A (zh) * 2016-10-10 2017-02-22 海能达通信股份有限公司 主节点、从节点以及同步信息自校正方法
CN108011701A (zh) * 2016-10-31 2018-05-08 海能达通信股份有限公司 一种数据发送方法、装置及网络设备
CN109891960B (zh) * 2016-11-10 2022-01-25 索尼公司 无线设备、无线设备处理方法和存储器
US11483788B2 (en) 2017-09-11 2022-10-25 Hytera Communications Corporation Limited Data frame, data sending method and device
CN107566378B (zh) * 2017-09-11 2021-04-27 海能达通信股份有限公司 一种数据帧、数据发送方法及装置
CN111182612B (zh) * 2018-11-12 2021-08-27 大唐移动通信设备有限公司 一种自组网中节点的入网同步方法及装置
CN111526577A (zh) * 2019-02-01 2020-08-11 华为技术有限公司 一种时钟同步方法及设备
CN109699071B (zh) * 2019-03-18 2021-03-16 辰芯科技有限公司 自组网通信系统的时间同步方法、系统和可读存储介质
CN109982428A (zh) * 2019-04-02 2019-07-05 海能达通信股份有限公司 构建同步网络的方法、终端、网络设备及同步网络系统
CN112020123A (zh) * 2019-05-28 2020-12-01 瑞昱半导体股份有限公司 低功耗无线网状网络及在无线网状网络中收发信号的方法
CN113543039B (zh) * 2020-04-22 2022-06-10 成都鼎桥通信技术有限公司 多播信号发送方法及设备
CN114302479B (zh) * 2021-12-24 2023-04-14 上海塔兰行智能科技有限公司 自组网系统及其节点处理方法、装置、设备与介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103442424A (zh) * 2013-07-30 2013-12-11 鄢春娥 同步Mesh网络基于随路信令的接入节点时钟同步方法及系统
WO2015047985A1 (en) * 2013-09-30 2015-04-02 Qualcomm Incorporated High precision access point to access point synchronization in an indoor position location system
US20150358930A1 (en) * 2014-06-09 2015-12-10 Parallel Wireless, Inc. Frequency and Phase Synchronization Using Full Duplex Radios Over Wireless Mesh Networks
CN105792346A (zh) * 2016-03-04 2016-07-20 海能达通信股份有限公司 同步方法、节点装置及无线mesh网络系统

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101123468B (zh) * 2006-08-08 2011-07-20 电信科学技术研究院 一种实现基站间空口同步的方法及系统
CN101247168B (zh) * 2007-02-15 2012-04-25 华为技术有限公司 一种时间同步的方法及系统
JP2009194822A (ja) * 2008-02-18 2009-08-27 Kyocera Corp 無線通信システム、マスタ基地局、スレーブ基地局および通信制御方法
CN104754722B (zh) * 2013-12-26 2018-03-27 中国科学院沈阳自动化研究所 一种面向层次化异构网络的时间同步方法
CN103929263B (zh) * 2014-04-30 2016-10-26 北京华力创通科技股份有限公司 网络通信方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103442424A (zh) * 2013-07-30 2013-12-11 鄢春娥 同步Mesh网络基于随路信令的接入节点时钟同步方法及系统
WO2015047985A1 (en) * 2013-09-30 2015-04-02 Qualcomm Incorporated High precision access point to access point synchronization in an indoor position location system
US20150358930A1 (en) * 2014-06-09 2015-12-10 Parallel Wireless, Inc. Frequency and Phase Synchronization Using Full Duplex Radios Over Wireless Mesh Networks
CN105792346A (zh) * 2016-03-04 2016-07-20 海能达通信股份有限公司 同步方法、节点装置及无线mesh网络系统

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115278705A (zh) * 2020-07-10 2022-11-01 展讯半导体(成都)有限公司 通信时序规划方法、装置、相关设备、存储介质及系统
CN115278705B (zh) * 2020-07-10 2024-05-14 展讯半导体(成都)有限公司 通信时序规划方法、装置、相关设备、存储介质及系统
CN113794547A (zh) * 2021-08-16 2021-12-14 中科苏州微电子产业技术研究院 一种多路信号同步方法、系统、电子设备及计算机可读存储介质
CN113794547B (zh) * 2021-08-16 2024-05-07 中科苏州微电子产业技术研究院 一种多路信号同步方法、系统、电子设备及计算机可读存储介质

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