CN106162810A - A kind of new node networking synchronous method of wireless multi-hop collaborative network - Google Patents
A kind of new node networking synchronous method of wireless multi-hop collaborative network Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
The present invention discloses the new node networking synchronous method of a kind of wireless multi-hop collaborative network, comprising: S1, in net node periodic broadcast MSH NCFG message；S2, new node carry out the scanning that networks, and set up physical neighborhood list, and according to selection multiple preliminary election patronage node；S3, new node select one from multiple preliminary elections patronage node and slightly synchronize；S4, new node opening timing device, and carry the MSH NENT message of each preliminary election patronage nodal information to the broadcast of each neighbor node simultaneously；S5, the propagation delay time receiving between the preliminary election patronage node calculating preliminary election patronage node of MSH NENT message and new node, and reply NCFG NEO message to new node；S6, new node after expiration of the timer, select a patronage node to carry out essence synchronization from the NCFG NEO message corresponding preliminary election patronage node receiving；S7, new node judge whether thick reference synchronization node is same node with essence reference synchronization node, as no, then carry out thick synchronous error and make up.Present invention achieves the precise synchronization of new node and network.
Description
Technical field
The present invention relates to wireless communication technology field.New node more particularly, to a kind of wireless multi-hop collaborative network
Networking synchronous method.
Background technology
IEEE 802.16 wireless Mesh netword is a kind of self-organizing motor synchronizing multi-hop collaborative network based on TDD, and synchronizes
Mechanism is the premise ensureing TDD system proper communication.Each node must obtain synchronization with network, just can be properly received network
Signal, and communicate with other nodes in network, therefore based in TDD system wireless multi-hop collaborative network, clock is same
The performance to system for the quality of step mechanism has a great impact.
The design of synchronization mechanism during node networking mainly includes slightly synchronizing and essence synchronization.Clock between intra-node
During synchronization is included in the two.The process that realizes mainly utilizes the MSH-NCFG under the Mesh pattern that IEEE 802.16d specifies
Message and self-defining interlayer primitive.
(1) slightly synchronize
New node is required for when powering on access network or falling net node re-accessing network scanning channel information, and searching is praised
Help node (Sponsor Node), and slightly synchronized with network by the MSH-NCFG message receiving.Node passes through MSH-
Timestamp parameter acquiring in NCFG message, at the clock of net node, arranges the clock of this node MAC layer according to this information,
Send synchronised clock primitive to radio-frequency head (RF), to realize the synchronization of intra-node simultaneously.
(2) essence synchronization
Interacting message when essence synchronization during networking is mainly by networking measures the propagation delay of wireless space, thus
Realize the essence synchronization of clock alignment between two nodes.New node is after finding patronage node and obtaining thick synchronization, at the 0 of No. 0 frame
Number time slot sends MSH-NENT:REQ message to patronage node, and node connecing according to oneself upon receiving the message is supported in preliminary election
Transmission time Estimate propagation delay time with sending node between the time receiving, and this information is embedded into MSH-NCFG:Net Entry
Open (NCFG-NEO) message replies to new node, new node according to the propagation delay time information that receives adjust clock be allowed to
Patronage node reaches essence synchronization.
The synchronization mechanism that above mechanism networks for single patronage node.And network machine-processed for many patronage nodes, entering of selection
The node of the thick synchronization of row is not necessarily the node of final essence synchronization, if thick synchronization is different from the reference mode of essence synchronization, and may
Synchronous error occurs.
Accordingly, it is desirable to provide the new node networking of a kind of machine-processed wireless multi-hop collaborative network that networks for many patronage nodes
Synchronous method.
Content of the invention
It is an object of the invention to provide the new node method of network entry of a kind of wireless multi-hop collaborative network, existing to solve
The networking synchronization mechanism of wireless multi-hop collaborative network, the thick synchronization of new node may go out when different from the reference mode of essence synchronization
The problem of existing synchronous error.
For reaching above-mentioned purpose, the present invention uses following technical proposals:
The new node networking synchronous method of a kind of wireless multi-hop collaborative network, the method comprises the steps:
S1, in net node periodic broadcast MSH-NCFG message, MSH-NCFG message include record broadcast MSH-NCFG
In the timestamp parameter of local zone time of net node during message；
S2, new node carry out the scanning that networks, and set up physical neighborhood list, physical neighborhood by the MSH-NCFG message receiving
The local zone time of new node when have recorded the timestamp parameter in MSH-NCFG message and reception MSH-NENT message in list, and
Support node according to each neighbor node in physical neighborhood list for the MSH-NCFG message receiving selects multiple preliminary election；
S3, new node select a preliminary election patronage node to enter as thick reference synchronization node from multiple preliminary elections patronage node
The thick synchronization of row；
S4, new node are opened and are limited the timer receiving the NCFG-NEO message time limit, and simultaneously in physical neighborhood list
The broadcast of each neighbor node carry the MSH-NENT message of each preliminary election patronage nodal information, MSH-NENT message includes that record is wide
The timestamp parameter of the local zone time of new node when broadcasting MSH-NENT message；
S5, receive MSH-NENT message preliminary election patronage node according to the timestamp parameter in MSH-NENT message and reception
During MSH-NENT message, the local zone time of preliminary election patronage node calculates the propagation delay time between preliminary election patronage node and new node, and
Reply NCFG-NEO message to new node, when NCFG-NEO message includes the transmission between preliminary election patronage node and new node
Prolong；
S6, new node after expiration of the timer, select from the NCFG-NEO message corresponding preliminary election patronage node receiving
One patronage node, and patronage node is carried out essence synchronization as essence reference synchronization node；
S7, new node judge whether thick reference synchronization node is same node with essence reference synchronization node, as no, then and basis
The MSH-NCFG message of the thick reference synchronization node broadcasts recording in physical neighborhood list and essence reference synchronization node broadcasts
Timestamp parameter in MSH-NCFG message carries out thick synchronous error and makes up.
Preferably, described physical neighborhood list is also recorded for neighbor node ID, neighbor node place network of network number,
Neighbor node is away from the signal to noise ratio of link between base station jumping figure, the son node number of neighbor node, new node and neighbor node and receives
The MSH-NCFG message number of neighbor node.
Preferably, choosing in each neighbor node in physical neighborhood list for the MSH-NCFG message that in step S2, basis receives
The method selecting multiple preliminary election patronage node is:
New node selects according in each neighbor node in physical neighborhood list of multiple selection factors of different priorities
Node is supported in multiple preliminary elections, and is ranked up multiple preliminary elections patronage node by multiple selection factors of different priorities, wherein,
Each selection factor is according to priority followed successively by from high to low: neighbor node place network of network number, the MSH-receiving neighbor node
The signal to noise ratio of link between NCFG message number, new node and neighbor node, neighbor node are away from base station jumping figure and neighbor node
Son node number.
Preferably, the detailed process of step S3 is:
A most forward preliminary election patronage node of new node selected and sorted from multiple preliminary elections patronage node is as thick synchronization
Reference mode, the timestamp ginseng in the MSH-NCFG message that the thick reference synchronization node according to record in physical neighborhood list sends
When number and new node receive MSH-NCFG message the local zone time of new node calculate new node and thick reference synchronization node when
Between poor, time difference according to new node and thick reference synchronization node adjusts the local zone time of new node, completes slightly to synchronize.
Preferably, the detailed process of step S6 is:
New node records the propagation delay time in the NCFG-NEO message receiving in physical neighborhood list, at timer then
After, the preliminary election patronage node that selected and sorted is the most forward from the NCFG-NEO message corresponding preliminary election patronage node receiving is made
For patronage node, and will patronage node as essence reference synchronization node, according to essence reference synchronization node reverts back NCFG-NEO disappear
Propagation delay time in breath adjusts the local zone time of new node, completes essence synchronization.
Preferably, the detailed process of step S7 is:
New node judges whether thick reference synchronization node is same node with essence reference synchronization node, as no, then according to thing
Timestamp parameter in the MSH-NCFG message that in reason neighbor list, the smart reference synchronization node of record sends and new node receive
During MSH-NCFG message the local zone time of new node calculate new node with essence reference synchronization node slightly synchronize at new node
Before time difference, then calculate new node and essence time difference before new node slightly synchronizes for the reference synchronization node and new node with
The difference of thick time difference before new node slightly synchronizes for the reference synchronization node, when adjusting new node local according to this difference
Between, complete thick synchronous error and make up.
Preferably, the local zone time of described adjustment new node method particularly includes: the MAC layer clock of new node is set and leads to
Cross interlayer clock primitive and adjust the physical layer clocks of new node.
Beneficial effects of the present invention is as follows:
Technical scheme of the present invention propose suitable for wireless multi-hop collaborative network many preliminary elections patronage node mechanism of networking
Synchronization mechanism.New node records and constantly updates thick synchronizing information when scanning channel reception MSH-NCFG message, in choosing
Go out after preliminary election patronage node according to the coarse synchronization of up-to-date information realization and network, same need to remember when receiving NCFG-NEO message
Record essence synchronizing information, after selecting patronage node just and this node carries out precise synchronization, and carries out thick synchronous error and makes up, it is achieved
New node and the precise synchronization of network.
Brief description
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail；
Fig. 1 illustrates the flow chart of the new node networking synchronous method of wireless multi-hop collaborative network.
Fig. 2 illustrates the schematic flow sheet slightly synchronizing in the new node networking synchronous method of wireless multi-hop collaborative network.
Fig. 3 illustrates the schematic flow sheet of essence synchronization in the new node networking synchronous method of wireless multi-hop collaborative network.
Detailed description of the invention
In order to be illustrated more clearly that the present invention, below in conjunction with preferred embodiments and drawings, the present invention is done further
Bright.Parts similar in accompanying drawing are indicated with identical reference.It will be appreciated by those skilled in the art that institute is concrete below
The content describing is illustrative and be not restrictive, and should not limit the scope of the invention with this.
As it is shown in figure 1, the new node networking synchronous method of the wireless multi-hop collaborative network of the present embodiment offer, including as follows
Step:
S1, in net node periodic broadcast MSH-NCFG message, MSH-NCFG message include record broadcast MSH-NCFG
In the timestamp parameter of local zone time of net node during message；
S2, new node carry out the scanning that networks, and set up physical neighborhood list, physical neighborhood by the MSH-NCFG message receiving
The local zone time of new node when have recorded the timestamp parameter in MSH-NCFG message and reception MSH-NENT message in list, and
Support node (preliminary election according to each neighbor node in physical neighborhood list for the MSH-NCFG message receiving selects multiple preliminary election
Father node)；
S3, new node select a preliminary election patronage node to enter as thick reference synchronization node from multiple preliminary elections patronage node
The thick synchronization of row；
S4, new node are opened and are limited the timer receiving the NCFG-NEO message time limit, and simultaneously in physical neighborhood list
The broadcast of each neighbor node carry the MSH-NENT message of each preliminary election patronage nodal information, MSH-NENT message includes that record is wide
The timestamp parameter of the local zone time of new node when broadcasting MSH-NENT message；
S5, receive MSH-NENT message preliminary election patronage node according to the timestamp parameter in MSH-NENT message and reception
During MSH-NENT message, the local zone time of preliminary election patronage node calculates the propagation delay time between preliminary election patronage node and new node, and
Reply NCFG-NEO message to new node, when NCFG-NEO message includes the transmission between preliminary election patronage node and new node
Prolong；
S6, new node after expiration of the timer, select from the NCFG-NEO message corresponding preliminary election patronage node receiving
One patronage node, and patronage node is carried out essence synchronization as essence reference synchronization node；
S7, new node judge whether thick reference synchronization node is same node with essence reference synchronization node, as no, then and basis
The MSH-NCFG message of the thick reference synchronization node broadcasts recording in physical neighborhood list and essence reference synchronization node broadcasts
Timestamp parameter in MSH-NCFG message carries out thick synchronous error and makes up.
Wherein,
As shown in Figures 2 and 3,
The detailed process of step S2 is:
New node sets up the physical neighborhood row of new node oneself according to the MSH-NCFG message receiving in networking scanning process
(that is, new node adds new node at net node as the neighbor node of new node using corresponding for the MSH-NCFG message receiving to table
The physical neighborhood list of oneself, in other words, the sender of the MSH-NCFG message receiving (is sent this MSH-NCFG to disappear by new node
Breath at net node) as new node neighbor node add new node oneself physical neighborhood list), in physical neighborhood list
In addition to have recorded the timestamp parameter in MSH-NCFG message and the local zone time of new node when receiving MSH-NENT message,
It is also recorded for neighbor node ID, neighbor node place network of network number, the son joint away from base station jumping figure, neighbor node for the neighbor node
Count, the signal to noise ratio of link, the basic letter such as MSH-NCFG message number receiving neighbor node between new node and neighbor node
Breath, these information selects suitable preliminary election patronage node for new node from neighbor node.
New node is after scanning completes, and according to the physical neighborhood list set up, selects suitable multiple preliminary elections patronage joint
Point, new node selects to consider multiple factor during preliminary election patronage node, including neighbor node place network of network number, Lin Jujie
Put the signal to noise ratio away from link between base station jumping figure, the son node number of neighbor node, new node and neighbor node, receive neighbor node
MSH-NCFG message number.
Wherein, new node first selects network number to determine network to be added, helping at net node in this network of reselection
Help and oneself complete to network.The selection of neighbor node place network of network number is to select by minimum ID principle, because existing group
Network fusion mechanism in net mechanism is also to merge according to minimum ID, therefore exists concurrently with multiple networks and energy intercommunication
Shi Douhui is fused in No. ID minimum network, so minimum ID back-and-forth method is rational.Receive the MSH-of neighbor node
Between NCFG message number and new node and neighbor node, the signal to noise ratio of link reflects the quality of physical channel, receives neighbours' joint
The MSH-NCFG message number of point is to select relative channel conditions preferable, and the noise of link between new node and neighbor node
Than being to select absolute channel condition preferable, only average signal-to-noise ratio is not less than threshold value new node and just will be considered that this at net node
There is patronage ability.Neighbor node influences whether the accuracy of synchronization away from base station jumping figure, and the son node number of neighbor node then helps
In equally loaded.Neighbor node can carry this neighbor node place network of network number in the MSH-NCFG message sending, be somebody's turn to do
The son node number away from base station jumping figure and this neighbor node for the neighbor node, new node can update these after receiving MSH-NCFG message and disappear
The MSH-NCFG message number being properly received simultaneously is added 1 by breath, and between new node and neighbor node, the signal to noise ratio of link is then by physics
Layer provides.
After the networking end of scan, neighbor node can be ranked up by new node according to the information preserving, and new node is at thing
Each neighbor node in reason neighbor list selects multiple preliminary election patronage node when priority when considering each selection factor by
High to Low be followed successively by: neighbor node place network of network number, the MSH-NCFG message number receiving neighbor node, new node with
The signal to noise ratio of link, the son node number away from base station jumping figure and neighbor node for the neighbor node between neighbor node.
That is, each neighbor node in physical neighborhood list for the new node selects multiple preliminary election patronage node method be:
New node selects multiple preliminary election according in each neighbor node in physical neighborhood list of multiple selection factors of different priorities
Patronage node, and by multiple preliminary elections patronage node be ranked up by multiple selection factors of different priorities, wherein, respectively select because of
Element is according to priority followed successively by from high to low: neighbor node place network of network number, the MSH-NCFG message receiving neighbor node
The signal to noise ratio of link, the son node number away from base station jumping figure and neighbor node for the neighbor node between number, new node and neighbor node.
Finally, the preliminary election patronage node that new node selects should be the MSH-NCFG message number that network number is less, receive relatively
Many, signal to noise ratio compared with big, away from base station, jumping figure is less, son node number also less neighbor node.
The detailed process of step S3 is:
A most forward preliminary election patronage node of new node selected and sorted from multiple preliminary elections patronage node is as thick synchronization
Reference mode (because in step below, receives the reply NCFG-NEO message of this node at the then front new node of timer
Probability relatively big and from every side combined factors consider, this node is optimal patronage node, if new node receives this joint
The NCFG-NEO message of point will select this node as patronage node and not need to carry out thick synchronous error and make up, and is only receiving
Less than when just can consider to select other nodes), according in physical neighborhood list record thick reference synchronization node send
When timestamp parameter in MSH-NCFG message and new node receive MSH-NCFG message, the local zone time of new node calculates and makes new advances
Node and the time difference of thick reference synchronization node, adjust the basis of new node according to the time difference of new node and thick reference synchronization node
The ground time, complete slightly to synchronize, wherein, adjust the local zone time of new node particularly as follows: arrange the MAC layer clock of new node and pass through
Interlayer clock primitive adjusts the physical layer clocks of new node.
The detailed process of step S6 is:
Owing to new node have sent MSH-NENT message to multiple neighbor nodes, node may be supported by multiple preliminary elections
NCFG-NEO message, new node finally will select a work from the NCFG-NEO message corresponding preliminary election patronage node receiving
Assist oneself to network for oneself real patronage node, and patronage node carried out essence synchronization as essence reference synchronization node,
Essence synchronization needs to make up propagation delay time, and propagation delay time is carried in NCFG-NEO message, but multiple pre-owing to having in improving mechanism
Choosing patronage node, then new node is not receivable to the just essence synchronization immediately of NCFG-NEO message, but record in physical neighborhood list
Propagation delay time in the NCFG-NEO message receiving, new node terminates (timer in the reception NCFG-NEO message time limit setting
Conduct of best (sorting the most forward) is selected to praise from the preliminary election patronage node successfully sending out NCFG-NEO message after then)
Node is helped (by each selection factor, preliminary election patronage node to be lined up an ordered list when selecting preliminary election patronage node, newly save
Point often receives a NCFG-NEO message, just disappears the mark position of corresponding preliminary election patronage node for having been received by NCFG-NEO
Breath, and in physical neighborhood list, preserve the propagation delay time in NCFG-NEO message, timer is searched after then from front to back should
List, first preliminary election patronage node having been received by NCFG-NEO message finding is the best patronage joint that can select
Point), then carry out essence synchronization further according to the propagation delay time in the NCFG-NEO message of this node preserving, the concrete side of essence synchronization
Method adjusts the local zone time of new node for the propagation delay time in the NCFG-NEO message according to essence reference synchronization node reverts back, completes
Essence synchronization, wherein, adjust new node local zone time particularly as follows: arrange new node MAC layer clock and pass through interlayer clock former
The physical layer clocks of intonation renewing node.
The detailed process of step S7 is:
New node judges whether thick reference synchronization node is same node with essence reference synchronization node, as no, then according to thing
Timestamp parameter in the MSH-NCFG message that in reason neighbor list, the smart reference synchronization node of record sends and new node receive
During MSH-NCFG message the local zone time of new node calculate new node with essence reference synchronization node slightly synchronize at new node
Before time difference, then calculate new node and essence time difference before new node slightly synchronizes for the reference synchronization node and new node with
The difference of thick time difference before new node slightly synchronizes for the reference synchronization node, when adjusting new node local according to this difference
Between, complete thick synchronous error and make up, wherein, adjust the local zone time of new node particularly as follows: arrange the MAC layer clock of new node simultaneously
Adjusted the physical layer clocks of new node by interlayer clock primitive.
Obviously, the above embodiment of the present invention is only for clearly demonstrating example of the present invention, and is not right
The restriction of embodiments of the present invention, for those of ordinary skill in the field, also may be used on the basis of the above description
To make other changes in different forms, cannot all of embodiment be given exhaustive here, every belong to this
What bright technical scheme was extended out obviously changes or changes the row still in protection scope of the present invention.
Claims (7)
1. the new node networking synchronous method of a wireless multi-hop collaborative network, it is characterised in that the method comprises the steps:
S1, in net node periodic broadcast MSH-NCFG message, MSH-NCFG message include record broadcast MSH-NCFG message
When in the timestamp parameter of local zone time of net node；
S2, new node carry out the scanning that networks, and set up physical neighborhood list, physical neighborhood list by the MSH-NCFG message receiving
In the local zone time of new node when have recorded timestamp parameter in MSH-NCFG message and reception MSH-NENT message, and according to
The MSH-NCFG message receiving selects multiple preliminary election patronage node in each neighbor node in physical neighborhood list；
S3, new node select a preliminary election patronage node to carry out slightly as thick reference synchronization node from multiple preliminary elections patronage node
Synchronization；
S4, new node are opened and are limited the timer receiving the NCFG-NEO message time limit, and simultaneously each in physical neighborhood list
The MSH-NENT message of each preliminary election patronage nodal information is carried in neighbor node broadcast, and MSH-NENT message includes record broadcast
The timestamp parameter of the local zone time of new node during MSH-NENT message；
S5, receive MSH-NENT message preliminary election patronage node according to the timestamp parameter in MSH-NENT message and receive MSH-
During NENT message, the local zone time of preliminary election patronage node calculates the propagation delay time between preliminary election patronage node and new node, and to newly
Node reverts back NCFG-NEO message, NCFG-NEO message includes the propagation delay time between preliminary election patronage node and new node；
S6, new node after expiration of the timer, select one from the NCFG-NEO message corresponding preliminary election patronage node receiving
Patronage node, and patronage node is carried out essence synchronization as essence reference synchronization node；
S7, new node judge whether thick reference synchronization node is same node with essence reference synchronization node, as no, then according to physics
The MSH-NCFG message of the thick reference synchronization node broadcasts recording in neighbor list and the MSH-of essence reference synchronization node broadcasts
Timestamp parameter in NCFG message carries out thick synchronous error and makes up.
2. the new node networking synchronous method of wireless multi-hop collaborative network according to claim 1, it is characterised in that described
Physical neighborhood list is also recorded for neighbor node ID, neighbor node place network of network number, neighbor node away from base station jumping figure,
The signal to noise ratio of link and receive the MSH-NCFG of neighbor node and disappear between the son node number of neighbor node, new node and neighbor node
Breath number.
3. the new node networking synchronous method of wireless multi-hop collaborative network according to claim 2, it is characterised in that step
The MSH-NCFG message that in S2, basis receives selects multiple preliminary election patronage node in each neighbor node in physical neighborhood list
Method be:
New node is multiple according to selecting in each neighbor node in physical neighborhood list of multiple selection factors of different priorities
Node is supported in preliminary election, and is ranked up multiple preliminary elections patronage node by multiple selection factors of different priorities, wherein, respectively selects
Factor of selecting according to priority is followed successively by from high to low: neighbor node place network of network number, the MSH-NCFG receiving neighbor node
Between message number, new node and neighbor node, signal to noise ratio, the son away from base station jumping figure and neighbor node for the neighbor node of link save
Count.
4. the new node networking synchronous method of wireless multi-hop collaborative network according to claim 3, it is characterised in that step
The detailed process of S3 is:
A most forward preliminary election patronage node of new node selected and sorted from multiple preliminary elections patronage node is as thick reference synchronization
Node, according in physical neighborhood list record thick reference synchronization node send MSH-NCFG message in timestamp parameter and
When new node receives MSH-NCFG message, the local zone time of new node calculates the time difference of new node and thick reference synchronization node,
Adjust the local zone time of new node according to the time difference of new node and thick reference synchronization node, complete slightly to synchronize.
5. the new node networking synchronous method of wireless multi-hop collaborative network according to claim 3, it is characterised in that step
The detailed process of S6 is:
New node records the propagation delay time in the NCFG-NEO message receiving in physical neighborhood list, after expiration of the timer,
The preliminary election patronage node conduct that selected and sorted is the most forward from the NCFG-NEO message corresponding preliminary election patronage node receiving
Patronage node, and node will be supported as essence reference synchronization node, according to the NCFG-NEO message of essence reference synchronization node reverts back
In propagation delay time adjust new node local zone time, complete essence synchronization.
6. the new node networking synchronous method of wireless multi-hop collaborative network according to claim 1, it is characterised in that step
The detailed process of S7 is:
New node judges whether thick reference synchronization node is same node with essence reference synchronization node, as no, then adjacent according to physics
Timestamp parameter in the MSH-NCFG message of the smart reference synchronization node transmission occupying record in list and new node receive MSH-
During NCFG message, the local zone time of new node calculates new node and essence reference synchronization node before new node slightly synchronizes
Time difference, then calculate new node and essence time difference before new node slightly synchronizes for the reference synchronization node and new node with thick with
The difference of step time difference before new node slightly synchronizes for the reference mode, adjusts the local zone time of new node according to this difference,
Complete thick synchronous error to make up.
7. the new node networking synchronous method of the wireless multi-hop collaborative network according to arbitrary in claim 4-6, its feature
It is, the local zone time of described adjustment new node method particularly includes: the MAC layer clock of new node is set and passes through interlayer clock
Primitive adjusts the physical layer clocks of new node.
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| CN107872872A (en) * | 2017-10-13 | 2018-04-03 | 西安电子科技大学 | A kind of networking synchronous method of Wireless MESH network |
| CN108124292A (en) * | 2017-12-13 | 2018-06-05 | 北京交通大学 | A kind of cooperative relay network cut-in method of wireless multi-hop collaborative network |
| CN109379158A (en) * | 2018-12-10 | 2019-02-22 | 浪潮电子信息产业股份有限公司 | Time synchronization method, device and equipment for newly added nodes in storage cluster |
| CN111787607A (en) * | 2020-06-30 | 2020-10-16 | 大唐终端技术有限公司 | Method for improving synchronization precision of ad hoc network |
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| CN111787607B (en) * | 2020-06-30 | 2023-04-18 | 大唐终端技术有限公司 | Method for improving synchronization precision of ad hoc network |
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| CN114666886B (en) * | 2022-02-21 | 2024-03-15 | 北京交通大学 | Ad hoc network synchronization method and system based on double radio frequencies |
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