CN105792346A - Synchronization method, node device and wireless MESH network system - Google Patents
Synchronization method, node device and wireless MESH network system Download PDFInfo
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- CN105792346A CN105792346A CN201610127934.0A CN201610127934A CN105792346A CN 105792346 A CN105792346 A CN 105792346A CN 201610127934 A CN201610127934 A CN 201610127934A CN 105792346 A CN105792346 A CN 105792346A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- 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
Abstract
The invention relates to a synchronization method and a node device for a wireless MESH network, and a wireless MESH network system which comprises the node device. According to the synchronization method, a slave node detects a synchronization signal which is broadcast by a master node; a frame boundary is acquired locally; and an access signal is transmitted to the master node. The master node detects the access signal which is transmitted from at least one slave node, estimates corresponding time delay information and broadcasts the time delay information. The slave node detects the time delay information which is transmitted by the main node. If the slave node detects the time delay information, the slave node adjusts the frame boundary according to the time delay information, thereby realizing synchronization with the main node. The synchronization method, the node device and the wireless MESH network system can improve synchronization performance of the MESH network node.
Description
Technical field
The application relates to Wireless MESH network field, specifically, for the synchronous method of Wireless MESH network and node apparatus and the Wireless MESH network system including described node apparatus.
Background technology
Wireless MESH network (wireless mesh network) is also referred to as " multi-hop (multi-hop) " network.The core guiding theory of Wireless MESH network is that each node in network can be launched and receive signal, any wireless device node can simultaneously as AP and router, each node in network can launch and receive signal, and each node directly can communicate with one or more peer node.The development of Wireless MESH network be in the ascendant among, industry is proposing and is developing various scheme.In this application, MESH network can be understood in a broad sense.
Wireless MESH network is divided into asynchronous network and synchronizing network.When network density and larger time, synchronize MESH network there is better network performance in actual applications.In synchronizing MESH network, it is desirable to the frame synchronization on node.When there being the external synchronization source auxiliary such as the GPS/ Big Dipper, the whole network synchronizes to be relatively easy to realize, and synchronization accuracy is also higher.But under a lot of scenes, for instance when underground, jungle, satellite-signal does not cover or signal quality is bad, will have a strong impact on the net synchronization capability of system.
Existing conventional simultaneous techniques includes beacon synchronization technology, namely when not adopting external synchronization clock source, only stamps timestamp in special packet switch, calculates the time difference between local and superior node, reach to synchronize with this between network node.The beacon synchronization technology of existing comparative maturity has:
NTP (NetworkTimeProtocol) technology: being mainly used in the Internet needs the network node of synchronization, is a kind of software synchronization technology.
IEEE1588 technology: the clock to nodes all in network that cardinal principle is by a synchronous signal cycle synchronizes, be the mode by software and hardware combining realize the network equipment master clock synchronize.
Both the above technology is generally used for wire communication, and some Wireless MESH networks also can use above both technology when synchronizing.Regardless of which kind of technology, it is typically all employing software time stamp, namely sending or reception message is inserting synchronizing information, but due to when sending or receive message, it is processed the impact of the factor such as device processing speed, operating system working method, soft timestamp has certain error with actual transmission or reception time, has a strong impact on synchronization accuracy.
When being synchronized by transmission synchronizing signal among the nodes, network generally can determine whether a host node.Host node sends synchronizing signal, receives synchronizing signal from node, and determines the frame boundaries of this locality according to synchronizing signal, it is achieved with the synchronization of host node.But, owing to the synchronizing signal on host node is to different from the propagation delay time of node, therefore still suffer from deviation from the frame boundaries node, it is impossible to the high-precise synchronization between each node of strict guarantee.
Therefore, still need to improve the synchronization of Wireless MESH network.
In information above-mentioned disclosed in described background section only for strengthening the understanding of the background to the present invention, therefore it can include not constituting the information to prior art known to persons of ordinary skill in the art.
Summary of the invention
A kind of synchronous method for Wireless MESH network of disclosure and node apparatus, it is possible to promote the net synchronization capability of MESH network node.
Other characteristics of the present invention and advantage will be apparent from by detailed description below, or partially by the practice of the present invention and acquistion.
According to an aspect of the present invention, it is provided that a kind of synchronous method for Wireless MESH network, including:
From the synchronizing signal of nodal test host node broadcast, on local getting frame border；
Described transmission from node to described host node accesses signal；
The described Delay issued from host node described in nodal test；
If described from nodal test to described Delay, then adjust described frame boundaries according to described Delay, thus realizing synchronization with described host node.
According to an embodiment, described from node to described host node send access signal include: described from node according to described frame boundaries to described host node send access signal.
According to an embodiment, the described Delay issued from host node described in nodal test includes: described from node sending after described access to described host node, continuing listening broadcast channel, detection sends the Delay whether having described host node to issue on the access running time-frequency resource of described access signal.
According to a further aspect in the invention, it is provided that a kind of synchronous method for Wireless MESH network, including:
Host node broadcast synchronization signal；
Described host node detection at least one access signal sent from node described；
Described host node is according to the corresponding Delay of access Signal estimation detected；
Described host node broadcasts described Delay.
According to an embodiment, preceding method also includes: described host node sets at least one at least one running time-frequency resource accessed from node described, and at least one running time-frequency resource described is respectively provided with respective running time-frequency resource ID.
According to an embodiment, described host node detection at least one access signal sent from node described includes: described host node traversal at least one running time-frequency resource described is to detect access signal.
According to an embodiment, described host node is broadcasted described Delay and is included: described host node broadcasts described Delay and corresponding described running time-frequency resource ID.
According to an embodiment, described host node includes according to the corresponding Delay of access Signal estimation detected: described host node, with its local frame border for benchmark, estimates corresponding Delay.
According to a further aspect in the invention, it is provided that a kind of node apparatus for Wireless MESH network, including:
Synchronization signal detection module, for detecting the synchronizing signal that host node sends, on local getting frame border；
Access signal transmitting module, access signal for sending to described host node；
Delay detection module, for detecting the Delay that described host node issues；
Synchronization module, for when described Delay detection module detects described Delay, adjusting described frame boundaries according to described Delay, thus it is synchronization with described host node to realize this node apparatus.
According to an embodiment, described access signal transmitting module is configured to send access signal according to described frame boundaries to described host node.
According to an embodiment, described Delay detection module is configured that after described access signal transmitting module sends described access to described host node, continuing listening broadcast channel, detection sends the Delay whether having described host node to issue on the access running time-frequency resource of described access signal.
According to a further aspect in the invention, it is provided that a kind of node apparatus for Wireless MESH network, including:
Synchronizing signal sending module, for broadcast synchronization signal；
Access signal detection module, for detecting at least one access signal sent from node described；
Time delay estimation module, for the corresponding Delay of access Signal estimation detected according to delay time signal detection module；
Delay sending module, is used for broadcasting described Delay.
According to an embodiment, aforementioned nodes device also includes running time-frequency resource module, and for setting at least one at least one running time-frequency resource accessed from node described, at least one running time-frequency resource described is respectively provided with respective running time-frequency resource ID.
According to an embodiment, described access signal detection module is configured that traversal at least one running time-frequency resource described is to detect access signal.
According to an embodiment, described Delay sending module is configured to broadcast described Delay and corresponding described running time-frequency resource ID.
According to an embodiment, time delay estimation module is configured that with local frame border for benchmark, according to the access signal that delay time signal detection module detects, estimates corresponding Delay.
According to a further aspect in the invention, it is provided that a kind of Wireless MESH network system, including aforementioned nodes device.
According to a further aspect in the invention, it is provided that a kind of node apparatus for Wireless MESH network, including emitter；Receptor；Processor；Memorizer, storage completes the instruction of following operation for described processor: the synchronizing signal that detection host node sends, on local getting frame border；Send to described host node and access signal；Detect the Delay that described host node issues；When described Delay being detected, adjust described frame boundaries according to described Delay, thus it is synchronization with described host node to realize this node apparatus.
According to a further aspect in the invention, it is provided that a kind of node apparatus for Wireless MESH network, including emitter；Receptor；Processor；Memorizer, storage completes the instruction of following operation for described processor: broadcast synchronization signal；Detection at least one access signal sent from node described；According to the corresponding Delay of access Signal estimation that delay time signal detection module detects；Broadcast described Delay.
Synchronous method according to embodiments of the present invention and node apparatus can promote the net synchronization capability of MESH network node.
Accompanying drawing explanation
Its example embodiment being described in detail by referring to accompanying drawing, the above-mentioned and further feature of the present invention and advantage will be apparent from.
Figure 1A, 1B and 1C illustrate the synchronizing process for Wireless MESH network according to an embodiment of the present invention；
Fig. 1 D illustrates the synchronous regime after the synchronizing process shown in Figure 1A-1C；
Fig. 1 E illustrates the signal sequence of the synchronizing process shown in Figure 1A-1C；
Fig. 1 F illustrates the synchronizing process for Wireless MESH network according to another embodiment of the present invention；
Fig. 1 G illustrates the synchronizing process for Wireless MESH network according to another embodiment of the present invention；
Fig. 2 illustrates the slave node side method synchronized for Wireless MESH network according to another embodiment of the present invention；
Fig. 3 illustrates the host node method synchronized for Wireless MESH network according to another embodiment of the present invention；
Fig. 4 illustrates the node apparatus for Wireless MESH network according to an embodiment of the present invention；
Fig. 5 illustrates the node apparatus for Wireless MESH network according to another embodiment of the present invention；
Fig. 6 illustrates the node apparatus for Wireless MESH network according to another embodiment of the present invention.
Specific embodiment
It is described more fully with example embodiment referring now to accompanying drawing.But, example embodiment can be implemented in a variety of forms, and is not understood as limited to embodiment set forth herein；On the contrary, it is provided that these embodiments make the present invention will fully and completely, and the design of example embodiment is conveyed to those skilled in the art all sidedly.Accompanying drawing labelling identical in the drawings represents same or similar part, thus will omit repetition thereof.
Additionally, described feature, structure or characteristic can be combined in one or more embodiment in any suitable manner.In the following description, it is provided that many details are thus providing fully understanding embodiments of the invention.It will be appreciated, however, by one skilled in the art that one or more without in described specific detail of technical scheme can be put into practice, or other method, constituent element, material, device, step etc. can be adopted.In other cases, known features, method, device, realization, material or operation are not shown in detail or describe to avoid fuzzy each aspect of the present invention.
Block diagram shown in accompanying drawing is only functional entity, it is not necessary to must be corresponding with physically separate entity.Namely, software form can be adopted to realize these functional entitys, or in the module that one or more softwares harden, realize the part of these functional entitys or functional entity, or in heterogeneous networks and/or processor device and/or microcontroller device, realize these functional entitys.
The present invention provides a kind of two-way synchronization method for Wireless MESH network.
Design according to the present invention, is utilized host node and sends signal from node respectively, being realized the synchronization of Wireless MESH network by bi-directional synchronization, it is possible to be obviously improved the net synchronization capability of MESH network node.
Example embodiment according to the technology of the present invention design is described with reference to the accompanying drawings.
Figure 1A, 1B and 1C illustrate the synchronizing process for Wireless MESH network according to an embodiment of the present invention.Fig. 1 D illustrates the synchronous regime after the synchronizing process shown in Figure 1A-1C.Fig. 1 E illustrates the signal sequence of the synchronizing process shown in Figure 1A-1C.
The synchronous method of the Wireless MESH network according to embodiment of the present invention is described referring to Figure 1A-1E.
As shown in Figure 1A and 1E, the first step, determine oneself be host node (sourcenode) after, host node is according to this nodal clock, broadcast synchronization signal.It addition, also can broadcast system information.
From the synchronizing signal that nodal test host node sends, it is thus achieved that each frame boundaries on node.
It addition, broadcast singal also can be detected obtains system information from node.Due to the impact of transmission delay, each frame boundaries now obtained from node can deviation to some extent, shown in T1, the T2 in Figure 1A.
As shown in Figure 1B and 1E, second step, in order to adjust from the frame boundaries node further, enable to align with the frame boundaries on host node as far as possible, from node according to the frame boundaries detected the such as first step, according to system information, respective independently transmitted access (discovery) signal is to host node.
Host node, with its local frame border for benchmark, detects the access signal sent from node, and estimates the Delay (TA) of transmission.Such as, with host node synchronizing signal local frame border for benchmark, detecting the delay accessing signal sent from node 1 is 2 times of T1, then can estimate the propagation delay time from node 1 is T1.
In order to support multiple to be concurrently accessed from node, multiple running time-frequency resource for accessing can be set, and be numbered.Host node travels through all of access running time-frequency resource, after access signal being detected, estimates TA.
As shown in Fig. 1 C and 1E, the 3rd step, the access running time-frequency resource ID of host node broadcast TA value and correspondence.
Whether from node after sending access signal, continuously listen for broadcast channel, detecting oneself to send on the access running time-frequency resource accessing signal has TA to issue, until time-out, then it represents that failed.
If receiving TA information, adjust, from node, the frame boundaries obtained from the first step according to TA, to realize the accurate synchronization with host node.
Then, from broadcast singal, SFN detected from node, update oneself local SFN, with Network Synchronization.
Fig. 1 D illustrates the synchronous regime after the synchronizing process shown in Figure 1A-1C.Referring to Fig. 1 D, the final goal of bi-directional synchronization is that the local frame border on all nodes should in a window centered by the frame boundaries of host node, it is achieved the basic synchronization of the whole network.
Compare one-way synchronization technology, reduce or eliminate the impact of propagation delay time according to the bi-directional synchronization technology of embodiment of the present invention, improve the performance of synchronization.
Fig. 2 illustrates the slave node side method synchronized for Wireless MESH network according to another embodiment of the present invention.
Referring to Figure 1A-1E, as in figure 2 it is shown, at S202, from the synchronizing signal of nodal test host node broadcast, on local getting frame border.
According to an embodiment, also detect broadcast singal from node to obtain system information.
At S204, send from node to host node and access signal.
According to an embodiment, multiple from node according to system information, respective independently transmitted access signal.
According to another embodiment, send access signal according to frame boundaries to host node from node.
At S206, from the Delay that nodal test host node issues.
According to an embodiment, from node after sending access to host node, continuing listening broadcast channel, detection sends and accesses the Delay whether having host node to issue on the access running time-frequency resource of signal.
At S208, it may be judged whether Delay detected.If be detected that Delay, then forward S210 to；Otherwise, S212 is forwarded to.
At S210, adjust frame boundaries according to Delay, thus realizing synchronization with host node.
For example, with reference to Fig. 1 C, adjust its local frame border from node 1 according to time delay T1, and adjust its local frame border from node 2 according to time delay T2, to realize the accurate synchronization with host node.After this, SFN can be detected from broadcast singal from node, update oneself local SFN, with Network Synchronization.
At S212, it may be judged whether time-out.It is not timed-out, then forwards S206 to, continue the Delay that detection host node issues；Otherwise, represent and detect unsuccessfully, forward S214 to.
At S214, it is judged that whether the frequency of failure exceedes pre-determined number N.Without exceeding pre-determined number N, then forward S204 to, send to host node and access signal.
Fig. 1 F and 1G illustrates to send from node and repeatedly accesses the schematic diagram that signal completes to synchronize.
In the scene of Fig. 1 F, for instance, when host node receiver noise/interference is bigger, host node cannot successfully detect the access signal sent from node every time, now needs repeatedly to send access signal (sending at most n times) from node.
Referring to Fig. 1 F, at time point a, host node sends synchronizing signal.
At time point b, from nodal test to synchronizing signal.
At first time point c, send from node and access signal.C and b fixed time apart t, d and a fixed time apart t.
Host node detection accesses Signal Fail.
At second time point c, send from node and access signal.
At second time point e, host node detects from the access signal that node sends.D and e interval 2*T1.
At time point f, T1 is sent to from node by host node.
At time point g, receive T1 from node, according to T1 correct frames border.
In the scene of Fig. 1 G, for instance, when from node receiver noise/interference bigger time, from node successfully cannot detect the system information comprising T1 every time time, it is also desirable to repeatedly send access signal from node.
Referring to Fig. 1 G, at time point a, host node sends synchronizing signal.
At time point b, from nodal test to synchronizing signal.
At time point c, send from node and access signal.C and b fixed time apart t, d and a fixed time apart t.
At first time point e, host node detects access signal.D and e interval 2*T1.
At first time point f, T1 is sent to from node by host node.
From the failure of nodal test Delay.
At second time point c, send from node and access signal.
At second time point e, host node detects from the access signal that node sends.D and e interval 2*T1.
At second time point f, T1 is sent to from node by host node.
At time point g, receive T1 from node, according to T1 correct frames border.
Fig. 3 illustrates the source node method synchronized for Wireless MESH network according to another embodiment of the present invention.
Referring to Figure 1A-1E, as it is shown on figure 3, at S302, after determining that it is host node, host node broadcast synchronization signal.It addition, host node also can broadcast system information.
At S304, host node detects at least one access signal sent from node.
According to an embodiment, host node sets at least one at least one running time-frequency resource accessed from node, and at least one running time-frequency resource is respectively provided with respective running time-frequency resource ID.
According to another embodiment, host node travels through at least one running time-frequency resource to detect access signal.
At S306, host node is according to the corresponding Delay of access Signal estimation detected.According to an embodiment, host node, with its local frame border for benchmark, estimates corresponding Delay.
At S308, host node broadcast Delay.Such as, according to an embodiment, host node broadcast Delay and corresponding running time-frequency resource ID, thus continuing can detect that from node of listening broadcast channel to send the Delay accessed running time-frequency resource accessing signal.
Fig. 4 illustrates the node apparatus for Wireless MESH network according to an embodiment of the present invention.
As shown in Figure 4, synchronization signal detection module 402 can be included for the node apparatus 400 of Wireless MESH network, access signal transmitting module 404, delay time signal detection module 406 and synchronization module 408.Node apparatus 400 can as aforesaid from node.
Synchronization signal detection module 402 can be used for detecting the synchronizing signal that host node sends, on local getting frame border.According to an embodiment, synchronization signal detection module 402 also can detect broadcast singal and obtain system information.
Access signal transmitting module 404 to can be used for sending to host node accessing signal.According to an embodiment, access signal transmitting module 404 and be configured to send access signal according to frame boundaries to host node.According to an embodiment, access signal transmitting module 404 according to system information independently transmitted access (discovery) signal to host node.
Delay detection module 406 can be used for detecting the Delay that host node issues.According to an embodiment, Delay detection module 406 can be configured to: after access signal transmitting module sends access to host node, continues listening broadcast channel, and detection transmission accesses the Delay whether having host node to issue on the access running time-frequency resource of signal.
Synchronization module 408 can be used for when Delay detection module detects Delay, adjusts frame boundaries according to Delay, thus it is synchronization with host node to realize this node apparatus.According to an embodiment, synchronization module 408 detects SFN from broadcast singal, updates oneself local SFN, with Network Synchronization.
Node apparatus 400 for Wireless MESH network can realize the previously described synchronous method according to the present application design, repeats no more with aforementioned similar explanation.
Fig. 5 illustrates the node apparatus for Wireless MESH network according to another embodiment of the present invention.
As it is shown in figure 5, the node apparatus 500 for Wireless MESH network can include synchronizing signal sending module 502, access signal detection module 504, time delay estimation module 506 and time delay information sending module 508.Node apparatus 500 can as aforesaid host node.
Synchronizing signal sending module 502 can be used for broadcast synchronization signal.According to an embodiment, after determining that node is host node (sourcenode), synchronizing signal sending module 502 is according to this nodal clock, broadcast synchronization signal.It addition, synchronizing signal sending module 502 also can broadcast system information.
Access signal detection module 504 to can be used for detecting at least one access signal sent from node.
According to an embodiment, node apparatus 500 also includes running time-frequency resource module, and for setting at least one at least one running time-frequency resource accessed from node, at least one running time-frequency resource is respectively provided with respective running time-frequency resource ID.
According to an embodiment, access signal detection module and can be configured at least one running time-frequency resource of traversal to detect access signal.
Time delay estimation module 506 can be used for the corresponding Delay of access Signal estimation detected according to delay time signal detection module.According to an embodiment, time delay estimation module can be configured to local frame border for benchmark, according to the access signal that delay time signal detection module detects, estimates corresponding Delay.
Delay sending module 508 can be used for broadcasting Delay.According to an embodiment, Delay sending module can be configured to broadcast Delay and corresponding running time-frequency resource ID.
Node apparatus 500 for Wireless MESH network can realize the previously described synchronous method according to the present application design, repeats no more with aforementioned similar explanation.
Wireless MESH network system according to an embodiment of the present invention can include aforementioned with reference to Fig. 4 node apparatus described, and as from node apparatus, and can include aforementioned with reference to Fig. 5 node apparatus described, as master node device.Such Wireless MESH network system can be obviously improved the net synchronization capability of network node.
Fig. 6 illustrates the node apparatus for Wireless MESH network according to an embodiment of the present invention.
As shown in Figure 6, processor 602, memorizer 604, emitter 606 and receptor 608 can be included for the node apparatus 600 of Wireless MESH network.
Memorizer 604 can store and perform, for processor 602, the instruction that operation processes.Memorizer 604 memorizer 504 can include volatibility or nonvolatile memory, such as static RAM (SRAM), Electrically Erasable Read Only Memory (EEPROM), Erasable Programmable Read Only Memory EPROM (EPROM), programmable read-only memory (prom), read only memory (ROM) etc., the present invention is not limited in this respect.
Processor 602 can call the instruction of storage in memorizer 604 and perform associative operation, as control transmitter 606 and receptor 608 carry out signal transmitting and receiving etc..
According to an embodiment, memorizer 604 stores the instruction completing following operation for processor 602: when described emitter launches signal in a time slot application different sub carrier to multiple receiving nodes, distribution is for each transmitting power of the plurality of receiving node, and each transmitting power of distribution is relevant to correspondingly received node.It can be readily appreciated that memorizer 604 also can store the instruction completing other operations according to embodiments of the present invention for processor 602, repeat no more here.
According to another embodiment, memorizer 604 stores the instruction completing following operation for processor 602: broadcast synchronization signal；Detection at least one access signal sent from node described；According to the corresponding Delay of access Signal estimation that delay time signal detection module detects；Broadcast described Delay.It can be readily appreciated that memorizer 604 also can store the instruction completing other operations according to embodiments of the present invention for processor 602, repeat no more here.
By the description of above embodiments, those skilled in the art is it can be readily appreciated that method and the corresponding module of the embodiment of the present invention can be realized by the mode that software or partial software harden.Therefore, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, including some instructions with so that a computing equipment (can be personal computer, server, mobile terminal or the network equipment etc.) performs method according to embodiments of the present invention.
It will be understood by those skilled in the art that accompanying drawing is the schematic diagram of example embodiment, module or flow process in accompanying drawing are not necessarily implemented necessary to the present invention, therefore cannot be used for limiting the scope of the invention.
It will be appreciated by those skilled in the art that above-mentioned each module can be distributed in device according to the description of embodiment, it is also possible to carry out respective change and be disposed other than in one or more devices of the present embodiment.The module of above-described embodiment can merge into a module, it is also possible to is further split into multiple submodule.
More than it is particularly shown and described the exemplary embodiment of the present invention.It should be understood that the invention is not restricted to institute's inventive embodiment, on the contrary, it is intended to various amendments in containing the spirit and scope being included in claims and equivalent arrangements.
Claims (10)
1. the synchronous method for Wireless MESH network, it is characterised in that including:
From the synchronizing signal of nodal test host node broadcast, on local getting frame border；
Described transmission from node to described host node accesses signal；
The described Delay issued from host node described in nodal test；
If described from nodal test to described Delay, then adjust described frame boundaries according to described Delay, thus realizing synchronization with described host node.
2. synchronous method as claimed in claim 1, it is characterised in that described transmission from node to described host node is accessed signal and included: described transmission to described host node according to described frame boundaries from node accesses signal.
3. the synchronous method for Wireless MESH network, it is characterised in that including:
Host node broadcast synchronization signal；
Described host node detection at least one access signal sent from node described；
Described host node is according to the corresponding Delay of access Signal estimation detected；
Described host node broadcasts described Delay.
4. synchronous method as claimed in claim 3, it is characterised in that also include: described host node sets at least one at least one running time-frequency resource accessed from node described, and at least one running time-frequency resource described is respectively provided with respective running time-frequency resource ID.
5. the node apparatus for Wireless MESH network, it is characterised in that including:
Synchronization signal detection module, for detecting the synchronizing signal that host node sends, on local getting frame border；
Access signal transmitting module, access signal for sending to described host node；
Delay detection module, for detecting the Delay that described host node issues；
Synchronization module, for when described Delay detection module detects described Delay, adjusting described frame boundaries according to described Delay, thus it is synchronization with described host node to realize this node apparatus.
6. node apparatus as claimed in claim 5, it is characterised in that described access signal transmitting module is configured to send access signal according to described frame boundaries to described host node.
7. the node apparatus for Wireless MESH network, it is characterised in that including:
Synchronizing signal sending module, for broadcast synchronization signal；
Access signal detection module, for detecting at least one access signal sent from node described；
Time delay estimation module, for the corresponding Delay of access Signal estimation detected according to delay time signal detection module；
Delay sending module, is used for broadcasting described Delay.
8. node apparatus as claimed in claim 7, it is characterised in that also include running time-frequency resource module, for setting at least one at least one running time-frequency resource accessed from node described, at least one running time-frequency resource described is respectively provided with respective running time-frequency resource ID.
9. the node apparatus for Wireless MESH network, it is characterised in that including:
Emitter；
Receptor；
Processor；
Memorizer, storage completes the instruction of following operation for described processor:
The synchronizing signal that detection host node sends, on local getting frame border；
Send to described host node and access signal；
Detect the Delay that described host node issues；
When described Delay being detected, adjust described frame boundaries according to described Delay, thus it is synchronization with described host node to realize this node apparatus.
10. the node apparatus for Wireless MESH network, it is characterised in that including:
Emitter；
Receptor；
Processor；
Memorizer, storage completes the instruction of following operation for described processor:
Broadcast synchronization signal；
Detection at least one access signal sent from node described；
According to the corresponding Delay of access Signal estimation that delay time signal detection module detects；
Broadcast described Delay.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610127934.0A CN105792346A (en) | 2016-03-04 | 2016-03-04 | Synchronization method, node device and wireless MESH network system |
| PCT/CN2017/075784 WO2017148445A1 (en) | 2016-03-04 | 2017-03-06 | Synchronization method, node device and wireless mesh network system |
| CN201710128739.4A CN107155213A (en) | 2016-03-04 | 2017-03-06 | Synchronous method, node apparatus and Wireless MESH network system |
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| CN201710128739.4A Pending CN107155213A (en) | 2016-03-04 | 2017-03-06 | Synchronous method, node apparatus and Wireless MESH network system |
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| WO (1) | WO2017148445A1 (en) |
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- 2016-03-04 CN CN201610127934.0A patent/CN105792346A/en active Pending
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2017
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Also Published As
| Publication number | Publication date |
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| CN107155213A (en) | 2017-09-12 |
| WO2017148445A1 (en) | 2017-09-08 |
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