CN106535138A - Synchronization method and synchronization device for time division multiple access (TDMA) self-organizing network - Google Patents
Synchronization method and synchronization device for time division multiple access (TDMA) self-organizing network Download PDFInfo
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- CN106535138A CN106535138A CN201610997863.XA CN201610997863A CN106535138A CN 106535138 A CN106535138 A CN 106535138A CN 201610997863 A CN201610997863 A CN 201610997863A CN 106535138 A CN106535138 A CN 106535138A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
The invention discloses a synchronization method and a synchronization device for a time division multiple access (TDMA) self-organizing network. The method comprises steps that the target node neighbor node broadcast information is acquired; frame timing step loss and emission time slot conflict of target nodes and neighbor nodes can be processed through the acquired broadcast information, and network frame timing and emission time slot are made to realize synchronization. The invention further discloses the synchronization device for the time division multiple access (TDMA) self-organizing network. The method is advantaged in that global network synchronization can be realized in a time division multiple access (TDMA) mode, signals in a wireless channel can be prevented from bumping, frequency spectrum utilization efficiency is improved, and problems of frame step loss and emission time slot conflict can be solved.
Description
Technical field
The present invention relates to networking technology area, more particularly to a kind of synchronous method and dress of time division multiple acess self-organizing network
Put.
Background technology
Wireless self-organization network generally adopts the multi-access mode based on contention access, or the multi-access mode based on the time-division,
Contention access mode needs first monitoring wireless channel and then competes acquisition without the need for the whole network time synchronized, when node needs to launch data
Wireless channel.But as the change of nodes is more, the probability that competition wireless channel collides can be increasing, and wireless channel is real
Time for data transfer can be reduced, and spectrum efficiency is reduced.Radio frames are divided into by several based on the multi-access mode of time-division
Time slot, one transmission time slot of each node distribution, each node send data in the transmission time slot of oneself, when each node has
When lasting data need transmitting, the availability of frequency spectrum of time division multiple access way is high.But, time division multiple acess needs strict the whole network same
Step, for self-organizing network, with greater need for no Centroid be time reference on the premise of obtain the whole network time synchronized,
Allocate slots to each node simultaneously.However, can still there is OOF and transmission time slot punching in current time division multiple access way
Prominent situation, leads to not obtain the synchronization of the whole network, and then wireless channel is collided, and spectrum utilization efficiency is poor.
The above is only used for auxiliary and understands technical scheme, does not represent and recognizes that the above is existing skill
Art.
The content of the invention
Present invention is primarily targeted at providing a kind of synchronous method of time division multiple acess self-organizing network, it is intended to solve the time-division
OOF and transmission time slot conflict in multi-access mode, lead to not obtain the synchronization of the whole network, and then cause signal in wireless channel
Collide, the problem of spectrum utilization efficiency difference.
For achieving the above object, the synchronous method of a kind of time division multiple acess self-organizing network that the present invention is provided, including：
Obtain destination node neighbors broadcast message；
Destination node is processed by the broadcast message for obtaining to conflict with the frame timing step-out and transmission time slot of neighbors, so that
The frame timing of network is synchronous with transmission time slot.
Preferably, when frame timing step-out and the transmitting of the broadcast message process destination node and neighbors by obtaining
Gap conflicts, so that the frame timing of network is synchronous with transmission time slot, including：
Neighbors synchronizing sequence is obtained, the original position that neighbors launches data is obtained according to the synchronizing sequence；
Neighbors broadcast message is obtained, neighbors transmitting data place time slot is therefrom extracted；
According to time slot position, the original position of time slot 0 is calculated, as neighbors frame start position；
The frame start position of contrast destination node and neighbors, if destination node is different from the frame start position of neighbors,
Then current frame timing step-out.
Preferably, if the destination node is different from the frame start position of neighbors, after current frame timing step-out, also
Including：
The network ID of neighbors is extracted in the neighbors broadcast message for getting；
The size of contrast target node network ID and neighbors network ID；
If the network ID of destination node is more than the network ID of neighbors, by the frame start position of destination node, to adjacent section
The frame start position alignment of point, and the network id values of destination node are updated to the network id values of neighbors；
If target node network ID need not adjust frame start position and network id values less than the network ID of neighbors.
Preferably, if the network ID of the destination node is more than the network ID of neighbors, by the frame starting of destination node
Position, to neighbors frame start position align, and by the network id values of destination node be updated to neighbors network id values it
Afterwards, also include：
When destination node and identical neighbors transmission time slot, neighbors is extracted in neighbors broadcast message is obtained and used
Family ID；
Contrast destination node ID and neighbors ID size；
If destination node ID is more than neighbors ID, neighbors obtains the transmission time slot, and destination node is found
New transmission time slot.
Preferably, if the destination node ID is more than neighbors ID, neighbors obtains the transmission time slot, mesh
After mark node finds new transmission time slot, also include：
If neighbors can not demodulate the broadcast message of destination node within the object time, destination node reselects transmitting
Time slot.
Additionally, for achieving the above object, the present invention also provides a kind of sychronisation of time division multiple acess self-organizing network, wraps
Include：
Acquisition module, for obtaining destination node neighbors broadcast message；
Processing module, processes frame timing step-out and the transmitting of destination node and neighbors for the broadcast message by obtaining
Time slot collision, so that the frame timing of network is synchronous with transmission time slot.
Preferably, the acquisition module, is additionally operable to obtain neighbors synchronizing sequence, derives neighbors according to the synchronizing sequence
The original position of transmitting data；It is additionally operable to obtain neighbors broadcast message；
Extraction module, for neighbors transmitting data place time slot is extracted in neighbors broadcast message；
Confirm module, for according to time slot position, calculating the original position of time slot 0, as neighbors start of frame bits
Put；
Contrast module, for contrasting the frame start position of destination node and neighbors；
Judge module, if different from the frame start position of neighbors for destination node, current frame timing step-out.
Preferably, the extraction module, is additionally operable to the network of neighbors is extracted in the neighbors broadcast message for getting
ID；
The contrast module, is additionally operable to contrast the size of target node network ID and neighbors network ID；
The processing module, if being additionally operable to the network ID of the network ID more than neighbors of destination node, by destination node
Frame start position, align to the frame start position of neighbors, and the network id values of destination node be updated to the net of neighbors
Network ID values；If being additionally operable to network IDs of the target node network ID less than neighbors, frame start position and network id values need not be adjusted.
Preferably, the extraction module, is additionally operable to, when destination node and identical neighbors transmission time slot, neighbour be obtained
Neighbors ID is extracted in node broadcasts information；
The contrast module, is additionally operable to contrast destination node ID and neighbors ID size；
The processing module, if being additionally operable to destination node ID more than neighbors ID, neighbors obtains this
Time slot is penetrated, destination node finds new transmission time slot.
Preferably, also include：
Analysis operation module, if being additionally operable to the broadcast message that neighbors can not demodulate destination node within the object time,
Destination node reselects transmission time slot.
The present invention is by obtaining destination node neighbors broadcast message；By obtain broadcast message process destination node with
The frame timing step-out of neighbors and transmission time slot conflict, so that the frame timing of network is synchronous with transmission time slot.Realize it is wireless from
Tissue nodes Timing Synchronization, and being capable of adaptive distribution transmission time slot.
Description of the drawings
Fig. 1 is the schematic flow sheet of the first embodiment of the synchronous method of time division multiple acess self-organizing network of the present invention；
Fig. 2 is the schematic flow sheet of the second embodiment of the synchronous method of time division multiple acess self-organizing network of the present invention；
Fig. 3 is the schematic flow sheet of the 3rd embodiment of the synchronous method of time division multiple acess self-organizing network of the present invention；
Fig. 4 is the high-level schematic functional block diagram of the first embodiment of the sychronisation of time division multiple acess self-organizing network of the present invention；
Fig. 5 is the high-level schematic functional block diagram of the second embodiment of the sychronisation of time division multiple acess self-organizing network of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
It should be appreciated that specific embodiment described herein is not intended to limit the present invention only to explain the present invention.
The present invention provides a kind of synchronous method of time division multiple acess self-organizing network.
With reference to Fig. 1, Fig. 1 is that the flow process of the first embodiment of the synchronous method of time division multiple acess self-organizing network of the present invention is illustrated
Figure.
In one embodiment, methods described includes：
Step S10, obtains destination node neighbors broadcast message；
In wireless self-organization network, launched in wireless data in ad hoc networks by node correspondence transmission time slot
Hold, the wireless data content sent by its interior joint correspondence transmission time slot, including synchronizing sequence, broadcast message and user data；
During transmitting wireless data content, monitoring wireless channel, it is destination node to choose any of which node definition, and, should
Destination node is sent including the data message including broadcast message by transmission time slot；Broadcast is demodulated mutually with the destination node
Another node of information, is defined as neighbors, and the broadcast message that the neighbors correspondence transmission time slot sends is neighbors broadcast
Information.The neighbors broadcast message content is obtained, to the frame timing step-out and transmission time slot that solve destination node and neighbors
Collision problem.
Step S20, processes the frame timing step-out and transmission time slot of destination node and neighbors by the broadcast message for obtaining
Conflict, so that the frame timing of network is synchronous with transmission time slot.
According to the neighbors broadcast message content for getting, and it is amplified data message, believe with destination node broadcast
The contrast of the data message that breath is amplified out, to the frame timing step-out and its transmission time slot punching for processing destination node and neighbors
It is prominent, so that network frame timing is synchronous with its transmission time slot in wireless self-organization network.
Further, frame timing step-out and the transmitting that destination node and neighbors are processed by the broadcast message for obtaining
Time slot collision, so that the frame timing of network is synchronous with transmission time slot, including：
Neighbors synchronizing sequence is obtained, the original position that neighbors launches data is obtained according to the synchronizing sequence；
Neighbors synchronizing sequence is obtained, the synchronizing sequence is the synchronizing sequence that neighbors time slot sends；According to what is obtained
Synchronizing sequence length correspondence gets the original position that the neighbors sends data；The neighbors sends data start,
According to synchronizing sequence length, and its synchronizing sequence original position for getting, determine that neighbors launches the original position of data.
Neighbors broadcast message is obtained, neighbors transmitting data place time slot is therefrom extracted；
Defined by neighbors, obtain the broadcast message that the neighbors sends；The neighbors broadcast message, with synchronous sequence
Row are successively sent by neighbors time slot, and, synchronizing sequence is relation arranged side by side or synchronous with broadcast message；Further, lead to
The position that synchronizing sequence determines the synchronizing sequence synchronous head is crossed, is for the broadcast information transmission data place time slot point.
Further, in the synchronizing sequence for obtaining, the most strong synchronizing sequence of detection signal power, to determine synchronous sequence
Row synchronous head is broadcast message time slot point；In this detection signal result, if there is overlapped synchronization in current sync sequence
Sequence, then in the synchronizing sequence, the most strong synchronizing sequence point of detection signal power is defined by the testing result, eliminates this inspection
The impact of the most strong synchronizing sequence of signal power in result is surveyed, then the weaker synchronizing sequence of detection signal power；Afterwards, detect same
Maximal peak point in step sequence, using the maximal peak point as the original position of synchronizing sequence, further, the peak-peak
The position of the synchronizing sequence synchronous head sent for wireless channel, is the node slot time point position.
According to time slot position, the original position of time slot 0 is calculated, as neighbors frame start position；
The synchronizing sequence synchronous head, be for time slot point wherein position, with the time slot point position derive forward to when
Gap 0, the time slot 0 are the node slot time original position；With time slot 0 as node original position until the time slot ends up, it is for this
One frame information of node.That is, one frame of destination node and neighbors.Also so can think, the synchronous head position is current slot boundary,
Derived to 0 position of time slot forward with boundary of time slot, be for time slot original position, i.e. frame start position.
The frame start position of contrast destination node and neighbors, if destination node is different from the frame start position of neighbors,
Then current frame timing step-out.
According to the frame start position for calculating destination node and neighbors, original position is contrasted, if destination node frame is initial
Position is different from neighbors frame start position, it is determined that present node frame timing step-out.The frame start position, during according to calculating
The original position of gap 0, draws destination node and neighbors frame start position, and the position of frame is determined by time slot node, when target section
There is error with the contrast of neighbors time slot node, arrangement in point, then current frame timing step-out.
Further, if the destination node is different from the frame start position of neighbors, judge current frame timing step-out it
Afterwards, also include：
The network ID of neighbors is extracted in the neighbors broadcast message for getting；
Under frame timing step loss condition, in neighbors broadcast message is got, network ID is extracted, and in destination node
Network ID is extracted in broadcast message, target node network ID and neighbors network ID is defined as；The Web ID information, is the time-division
Multiple access self-organizing network transmission includes data, is obtained when broadcast message is obtained in the lump.
The size of contrast target node network ID and neighbors network ID；
The target node network ID that contrast destination node broadcast message is extracted is extracted with neighbors broadcast message is got
Neighbors network ID size, the way of contrast is to be contrasted according to current ID numerical value；Or, according to the ID performance sides
Formula, it is contrasted, concrete way of contrast, is determined with the form of expression of ID, and here is seldom repeated.
If the network ID of destination node is more than the network ID of neighbors, by the frame start position of destination node, to adjacent section
The frame start position alignment of point, and the network id values of destination node are updated to the network id values of neighbors；
Target node network ID and neighbors network ID size that contrast is extracted, if target node network ID is more than neighbors
Network ID, then be defined by neighbors frame start position, destination node frame start position is alignd to neighbors frame start position, i.e.,
Adjustment destination node frame start position alignment neighbors frame start position；The target node network ID values are also changed to neighbors
Network id values；That is, described frame start position is defined by the little value of network ID.
If target node network ID need not adjust frame start position and network id values less than the network ID of neighbors.
If current target node network ID is less than neighbors network ID, the problem of frame timing is not affected, maintain current mesh
Mark node is constant with neighbors state；The state is constant, comprising broadcast message, frame start position, synchronizing sequence information and solution
Adjust both sides' broadcast message etc..
Further, if the network ID of the destination node is less than the network ID of neighbors, by the frame starting of neighbors
Position, aligns to the frame start position of destination node, and the network id values of neighbors is updated to the network id values of destination node
Afterwards, also include：
When destination node and identical neighbors transmission time slot, neighbors is extracted in neighbors broadcast message is obtained and used
Family ID；
After frame timing synchronization in time division multiple acess self-organizing network, detection currently whether there is transmission time slot conflict, described
Transmission time slot conflicts, and is that the transmission time slot for using of destination node and neighbors is defined as transmission time slot conflict for same；
ID, i.e. destination node ID and neighbors are extracted in having got destination node broadcast message and neighbors broadcast message
ID.
Contrast destination node ID and neighbors ID size；
Extract in contrasting the destination node ID and neighbors broadcast message extracted in destination node broadcast message
Neighbors ID size, the ID size contrast is the contrast ID numerical value.
If destination node ID is more than neighbors ID, neighbors obtains the transmission time slot, and destination node is found
New transmission time slot.
Contrast destination node ID and neighbors ID numerical value, if destination node ID is more than neighbors ID
When, then it is preferential with little person, when the transmission time slot conflicts, neighbors obtains the transmission time slot, and destination node finds new transmitting
Time slot, vice versa, if destination node ID is less than neighbors ID, destination node uses the transmission time slot.
When the present embodiment is processed the frame timing step-out of destination node and neighbors and is launched by the broadcast message for getting
Gap conflicts, so that the frame timing of network is synchronous with transmission time slot, realizes wireless ad hoc network node Timing Synchronization, and oneself
The method for adapting to distribution transmission time slot.
With reference to Fig. 2, Fig. 2 is that the flow process of the second embodiment of the synchronous method of time division multiple acess self-organizing network of the present invention is illustrated
Figure.Based on the first embodiment of said method, if the destination node ID is less than neighbors ID, destination node is obtained
The transmission time slot is obtained, after neighbors finds new transmission time slot, is also included：
Step S30, if neighbors can not demodulate the broadcast message of destination node within the object time, destination node is again
Select transmission time slot.
When destination node distributes transmission time slot with neighbors, if destination node ID is less than neighbors ID,
Destination node uses the transmission time slot, neighbors to find again spare transmission time slot；The spare transmission time slot, in broadcast channel
In have the unnecessary transmission time slot not used by node, referred to as spare transmission time slot；Neighbors chooses a spare transmission time slot to make
For its own transmission time slot, to send the data such as broadcast message, and destination node broadcast message is demodulated using the transmission time slot；Mesh
The broadcast message that mark node demodulation neighbors sends, while its own transmission time slot is sent broadcast message to neighbors transmission time slot
Demodulation；If neighbors can not demodulate destination node broadcast message within the object time, then it represents that the used transmission time slot of neighbors
Broadcast message can not be demodulated corresponding with destination node transmission time slot, because neighbors broadcast message uses spare transmission time slot, not
To exchange, then destination node reselection procedure transmission time slot, i.e. destination node reselection procedure channel idle transmission time slot.During the target
Interior demodulation broadcast message, is the setting broadcast message demodulation time in self-organizing network synchronization, to improve Network Synchronization efficiency.
In order to preferably describe the embodiment of the present invention, with reference to Fig. 3, including：
Step S1, node start；
Start TDMA radio self-organizing network, the node starts to open transmission broadcast message.
Step S2, wireless channel are monitored, and distribute transmission time slot；
Open wireless channel to monitor, each node is oneself distribution transmission time slot, adjacent to send broadcast message and demodulation
Node broadcasts information.
Step S3, searches for neighbors synchronous head, demodulates broadcast message；
Present node is defined as destination node, and the destination node searches for neighbors synchronous head by transmission time slot, for solving
Adjust neighbors broadcast message.Further, a kind of method of search synchronous head, including：Neighbors detect in signal from being received
Synchronizing sequence, obtains detection peak value by way of matched filtering；Peak-peak position is found in synchronizing sequence, an adjacent section is represented
The synchronizing sequence original position of point；Delete the peak value and its a range of peak value of surrounding；Peak-peak is found again, detects which
The synchronizing sequence of his neighbors.Or the strong signal is deducted from receiving in signal, being iteratively repeated the detection process of synchronizing sequence,
Detect the synchronizing sequence of other neighbors.
Step S4, obtains neighbors frame timing and transmission time slot；
By searching neighbors synchronous head, the broadcast message for demodulating, during obtaining neighbors frame timing with transmitting
Gap；Further, a kind of method for calculating true original position, including：Obtain the original position of synchronous head；Demodulation broadcast message is obtained
Neighbors transmission time slot, while and synchronizing sequence transmission time slot, then when the original position of synchronous head is exactly the transmitting
The original position of gap, after synchronizing sequence peak-peak determines boundary of time slot, is time slot according to the boundary of time slot position
Number, derive the original position for obtaining time slot 0, i.e. frame start position.
Step S5, if having frame timing conflict；
According to the neighbors frame timing for currently getting, judge whether frame timing conflict, the current frame timing punching
It is prominent, it is inconsistent with the frame start position of neighbors for present node, is defined as frame timing conflict.If present node and neighbors
Frame start position is consistent, then there is no frame timing conflict, and whether judgement currently has transmission time slot conflict.
Step S6, solves to conflict using network ID；
If current frame timing is clashed, a kind of method for solving frame timing step-out, including：Wrap in the broadcast message of node
Containing network ID field, during node initializing, network is equal to the ID of present node.When the frame of nodal test to present node rises
When beginning position is different from the frame start position of neighbors, compare the network ID of present node and the network ID of neighbors, when adjacent section
The frame start position of present node when spot net ID is less, is adjusted, is alignd to neighbors.Meanwhile, the network ID of neighbors is assigned
It is worth to the network ID of present node.Conversely, when the network ID of present node is less, frame start position and network ID need not be adjusted.
Step S7, if having transmission time slot conflict；
If current frame timing is not clashed, or, current frame timing passes through to process frame timing conflict solution after clashing
After removing, judge currently whether there is transmission time slot conflict, the transmission time slot conflict refers to present node or neighbors using during transmitting
When gap can not reconcile broadcast message, it is judged to currently there is transmission time slot conflict.
Step S8, solves to conflict using ID；
If currently there is transmission time slot conflict, a kind of method for solving transmission time slot conflict, including：The broadcast message of node
In include user's id field.When the transmission time slot of nodal test to present node and the identical transmission time slot of neighbors, compare
Present node ID and neighbors ID.When neighbors ID is less, then the transmission time slot is abandoned, from vacant transmission time slot
A time slot is selected as the new transmission time slot of present node.When the ID of present node is less, then the time slot is continuing with
Launch this node data.To avoid ID compared with minor node because the higher transmission time slot for occupying a conflict always of priority,
When the node long-time detects neighbors cannot correctly demodulate the broadcast message of itself, when the node needs gravity treatment to launch
Gap.
Step S9, obtains the whole network synchronization.
In current time division multiple acess self-organizing networking, frame timing and its transmission time slot are normal, reach the whole network synchronization.
When the executive agent of the synchronous method of above-mentioned the first to 3rd embodiment time division multiple acess self-organizing network can be
Divide multiple access wireless self-organization network or the testing equipment being connected with TDMA radio self-organizing network device signal.Further
Ground, the synchronous method of the time division multiple acess self-organizing network can be by the client detection on electronic equipment or testing equipment
Program realization, wherein, the electronic equipment can include but is not limited to the electronic equipments such as PC.The testing equipment include but
It is not limited to mobile phone, pad, notebook computer etc..
The present invention further provides a kind of sychronisation of time division multiple acess self-organizing network.
With reference to Fig. 4, Fig. 4 is the functional module of the first embodiment of the sychronisation of time division multiple acess self-organizing network of the present invention
Schematic diagram.
In one embodiment, described device includes：Acquisition module 10, processing module 20, extraction module 30, confirmation module
40th, contrast module 50 and judge module 60.
Acquisition module 10, for obtaining the broadcast message of destination node and adjacent node；
In wireless self-organization network, launched in wireless data in ad hoc networks by node correspondence transmission time slot
Hold, the wireless data content sent by its interior joint correspondence transmission time slot, including synchronizing sequence, broadcast message and user data；
During transmitting wireless data content, monitoring wireless channel, it is destination node to choose any of which node definition, and, should
Destination node is sent including the data message including broadcast message by transmission time slot；Broadcast is demodulated mutually with the destination node
Another node of information, is defined as neighbors, and the broadcast message that the neighbors correspondence transmission time slot sends is neighbors broadcast
Information.The neighbors broadcast message content is obtained, to the frame timing step-out and transmission time slot that solve destination node and neighbors
Collision problem.
Processing module 20, for processed by the broadcast message that gets destination node and neighbors frame timing step-out and
Transmission time slot conflicts, so that the frame timing of network is synchronous with transmission time slot.
According to the neighbors broadcast message content for getting, and it is amplified data message, believe with destination node broadcast
The contrast of the data message that breath is amplified out, to the frame timing step-out and its transmission time slot punching for processing destination node and neighbors
It is prominent, so that network frame timing is synchronous with its transmission time slot in wireless self-organization network.
Further, frame timing step-out and the transmitting that destination node and neighbors are processed by the broadcast message for obtaining
Time slot collision, so that the frame timing of network is synchronous with transmission time slot, including：
The acquisition module 10, is additionally operable to obtain neighbors synchronizing sequence, derives neighbors transmitting according to the synchronizing sequence
The original position of data；
Neighbors synchronizing sequence is obtained, the synchronizing sequence is the synchronizing sequence that neighbors time slot sends；According to what is obtained
Synchronizing sequence length correspondence gets the original position that the neighbors sends data；The neighbors sends data start,
According to synchronizing sequence length, and its synchronizing sequence original position for getting, determine that neighbors launches the original position of data.
The acquisition module 10, is additionally operable to obtain neighbors broadcast message；
Defined by neighbors, obtain the broadcast message that the neighbors sends；The neighbors broadcast message, with synchronous sequence
Row are successively sent by neighbors time slot, and, synchronizing sequence is relation arranged side by side or synchronous with broadcast message；
Extraction module 30, for neighbors transmitting data place time slot is extracted in neighbors broadcast message；
The position of the synchronizing sequence synchronous head is determined by synchronizing sequence, is for the broadcast information transmission data place time slot
Point.In the synchronizing sequence for obtaining, the most strong synchronizing sequence of detection signal power, to determine that synchronizing sequence synchronous head is broadcasted
Information slot point；In this detection signal result, if there is overlapped synchronizing sequence in current sync sequence, in the synchronization
In sequence, the most strong synchronizing sequence point of detection signal power is defined by the testing result, eliminates signal power in this testing result
The impact of most strong synchronizing sequence, the then weaker synchronizing sequence of detection signal power；Afterwards, detect peak-peak in synchronizing sequence
Point, using the maximal peak point as the original position of synchronizing sequence, further, what the peak-peak was sent for wireless channel
The position of the synchronizing sequence synchronous head, is the node slot time point position.
Confirm module 40, for according to time slot position, calculating the original position of time slot 0, as the starting of neighbors frame
Position；
The synchronizing sequence synchronous head, be for time slot point wherein position, with the time slot point position derive forward to when
Gap 0, the time slot 0 are the node slot time original position；With time slot 0 as node original position until the time slot ends up, it is for this
One frame information of node.That is, one frame of destination node and neighbors.Also so can think, the synchronous head position is current slot boundary,
Derived to 0 position of time slot forward with boundary of time slot, be for time slot original position, i.e. frame start position.
Contrast module 50, for contrasting the frame start position of destination node and neighbors；
According to the frame start position for calculating destination node and neighbors, both contrasts frame start position, to determine two
Whether person's frame start position is identical.
Judge module 60, if different from the frame start position of neighbors for destination node, current frame timing step-out.
If destination node frame start position is different from neighbors frame start position, it is determined that present node frame timing step-out.
The frame start position, according to the original position for calculating time slot 0, draws destination node and neighbors frame start position, the position of frame
Put and determined by time slot node, when destination node is contrasted with neighbors time slot node, error occurs in arrangement, then current frame timing is lost
Step.
Further, if the destination node is different from the frame start position of neighbors, after current frame timing step-out,
Also include：
The extraction module 30, is additionally operable to the network ID of neighbors is extracted in the neighbors broadcast message for getting；
Under frame timing step loss condition, in neighbors broadcast message is got, network ID is extracted, and in destination node
Network ID is extracted in broadcast message, target node network ID and neighbors network ID is defined as；The Web ID information, is the time-division
Multiple access self-organizing network transmission includes data, is obtained when broadcast message is obtained in the lump.
The contrast module 50, is additionally operable to contrast the size of target node network ID and neighbors network ID；
The target node network ID that contrast destination node broadcast message is extracted is extracted with neighbors broadcast message is got
Neighbors network ID size, the way of contrast is to be contrasted according to current ID numerical value；Or, according to the ID performance sides
Formula, it is contrasted, concrete way of contrast, is determined with the form of expression of ID, and here is seldom repeated.
The processing module 20, if being additionally operable to the network ID of the network ID more than neighbors of destination node, by target section
The frame start position of point, aligns to the frame start position of neighbors, and the network id values of destination node is updated to neighbors
Network id values；
Target node network ID and neighbors network ID size that contrast is extracted, if target node network ID is more than neighbors
Network ID, then be defined by neighbors frame start position, destination node frame start position is alignd to neighbors frame start position, i.e.,
Adjustment destination node frame start position alignment neighbors frame start position；The target node network ID values are also changed to neighbors
Network id values；That is, described frame start position is defined by the little value of network ID.
The processing module 20, if being additionally operable to network IDs of the target node network ID less than neighbors, need not adjust frame and rise
Beginning position and network id values.
If current target node network ID is less than neighbors network ID, the problem of frame timing is not affected, maintain current mesh
Mark node is constant with neighbors state；The state is constant, comprising broadcast message, frame start position, synchronizing sequence information and solution
Adjust both sides' broadcast message etc..
Further, if the frame of destination node is risen by the network ID of the destination node more than the network ID of neighbors
Beginning position, aligns to the frame start position of neighbors, and the network id values of destination node is updated to the network id values of neighbors
Afterwards, also include：
The extraction module 30, is additionally operable to, when destination node and identical neighbors transmission time slot, neighbors be obtained
Neighbors ID is extracted in broadcast message；
After frame timing synchronization in time division multiple acess self-organizing network, detection currently whether there is transmission time slot conflict, described
Transmission time slot conflicts, and is that the transmission time slot for using of destination node and neighbors is defined as transmission time slot conflict for same；
ID, i.e. destination node ID and neighbors are extracted in having got destination node broadcast message and neighbors broadcast message
ID.
The contrast module 50, is additionally operable to contrast destination node ID and neighbors ID size；
Extract in contrasting the destination node ID and neighbors broadcast message extracted in destination node broadcast message
Neighbors ID size, the ID size contrast is the contrast ID numerical value.
The processing module 20, if being additionally operable to destination node ID more than neighbors ID, neighbors is somebody's turn to do
Transmission time slot, destination node find new transmission time slot.
Contrast destination node ID and neighbors ID numerical value, if destination node ID is more than neighbors ID
When, then it is preferential with little person, when the transmission time slot conflicts, neighbors obtains the transmission time slot, and destination node finds new transmitting
Time slot, vice versa, if destination node ID is less than neighbors ID, destination node uses the transmission time slot.
When the present embodiment is processed the frame timing step-out of destination node and neighbors and is launched by the broadcast message for getting
Gap conflicts, so that the frame timing of network is synchronous with transmission time slot, realizes wireless ad hoc network node Timing Synchronization, and oneself
The method for adapting to distribution transmission time slot.
With reference to Fig. 5, Fig. 5 is the functional module of the second embodiment of the sychronisation of time division multiple acess self-organizing network of the present invention
Schematic diagram.Described device also includes analysis operation module 80.
Analysis operation module 70, if being additionally operable to the broadcast message that neighbors can not demodulate destination node within the object time,
Then destination node reselects transmission time slot.
When destination node distributes transmission time slot with neighbors, if destination node ID is less than neighbors ID,
Destination node uses the transmission time slot, neighbors to find again spare transmission time slot；The spare transmission time slot, in broadcast channel
In have the unnecessary transmission time slot not used by node, referred to as spare transmission time slot；Neighbors chooses a spare transmission time slot to make
For its own transmission time slot, to send the data such as broadcast message, and destination node broadcast message is demodulated using the transmission time slot；Mesh
The broadcast message that mark node demodulation neighbors sends, while its own transmission time slot is sent broadcast message to neighbors transmission time slot
Demodulation；If neighbors can not demodulate destination node broadcast message within the object time, then it represents that the used transmission time slot of neighbors
Broadcast message can not be demodulated corresponding with destination node transmission time slot, because neighbors broadcast message uses spare transmission time slot, not
To exchange, then destination node reselection procedure transmission time slot, i.e. destination node reselection procedure channel idle transmission time slot.During the target
Interior demodulation broadcast message, is the setting broadcast message demodulation time in self-organizing network synchronization, to improve Network Synchronization efficiency.
The preferred embodiments of the present invention are these are only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of synchronous method of time division multiple acess self-organizing network, it is characterised in that the method comprising the steps of：
Obtain destination node neighbors broadcast message；
Destination node is processed by the broadcast message for obtaining to conflict with the frame timing step-out and transmission time slot of neighbors, so that network
Frame timing it is synchronous with transmission time slot.
2. the synchronous method of time division multiple acess self-organizing network as claimed in claim 1, it is characterised in that described wide by what is obtained
Broadcast information processing destination node to conflict with the frame timing step-out and transmission time slot of neighbors, during so that the frame timing of network is with launching
Gap synchronization, including：
Neighbors synchronizing sequence is obtained, the original position that neighbors launches data is obtained according to the synchronizing sequence；
Neighbors broadcast message is obtained, neighbors transmitting data place time slot is therefrom extracted；
According to time slot position, the original position of time slot 0 is calculated, as neighbors frame start position；
The frame start position of contrast destination node and neighbors, if destination node is different from the frame start position of neighbors, when
Front frame timing step-out.
3. the synchronous method of time division multiple acess self-organizing network as claimed in claim 2, it is characterised in that if the destination node with
The frame start position of neighbors is different, then, after current frame timing step-out, also include：
The network ID of neighbors is extracted in the neighbors broadcast message for getting；
The size of contrast target node network ID and neighbors network ID；
If the network ID of destination node is more than the network ID of neighbors, by the frame start position of destination node, to neighbors
Frame start position is alignd, and the network id values of destination node are updated to the network id values of neighbors；
If target node network ID need not adjust frame start position and network id values less than the network ID of neighbors.
4. the synchronous method of time division multiple acess self-organizing network as claimed in claim 3, it is characterised in that if the destination node
Network ID of the network ID more than neighbors, then by the frame start position of destination node, align to the frame start position of neighbors, and
After the network id values of destination node are updated to the network id values of neighbors, also include：
When destination node and identical neighbors transmission time slot, neighbors user is extracted in neighbors broadcast message is obtained
ID；
Contrast destination node ID and neighbors ID size；
If destination node ID is more than neighbors ID, neighbors obtains the transmission time slot, and destination node finds new sending out
Penetrate time slot.
5. the synchronous method of time division multiple acess self-organizing network as claimed in claim 4, it is characterised in that if the destination node is used
Family ID is more than neighbors ID, then neighbors obtains the transmission time slot, after destination node finds new transmission time slot, also wraps
Include：
If neighbors can not demodulate the broadcast message of destination node within the object time, when destination node reselects transmitting
Gap.
6. a kind of sychronisation of time division multiple acess self-organizing network, it is characterised in that include：
Acquisition module, for obtaining destination node neighbors broadcast message；
Processing module, processes the frame timing step-out and transmission time slot of destination node and neighbors for the broadcast message by obtaining
Conflict, so that the frame timing of network is synchronous with transmission time slot.
7. the sychronisation of time division multiple acess self-organizing network as claimed in claim 6, it is characterised in that the acquisition module, also
For obtaining neighbors synchronizing sequence, the original position that neighbors launches data is derived according to the synchronizing sequence；It is additionally operable to obtain
Neighbors broadcast message；
Extraction module, for neighbors transmitting data place time slot is extracted in neighbors broadcast message；
Confirm module, for according to time slot position, calculating the original position of time slot 0, as neighbors frame start position；
Contrast module, for contrasting the frame start position of destination node and neighbors；
Judge module, if different from the frame start position of neighbors for destination node, current frame timing step-out.
8. the sychronisation of time division multiple acess self-organizing network as claimed in claim 7, it is characterised in that the extraction module, also
For the network ID for extracting neighbors in the neighbors broadcast message for getting；
The contrast module, is additionally operable to contrast the size of target node network ID and neighbors network ID；
The processing module, if being additionally operable to the network ID of the network ID more than neighbors of destination node, by the frame of destination node
Original position, aligns to the frame start position of neighbors, and the network id values of destination node is updated to the network ID of neighbors
Value；If being additionally operable to network IDs of the target node network ID less than neighbors, frame start position and network id values need not be adjusted.
9. the sychronisation of time division multiple acess self-organizing network as claimed in claim 8, it is characterised in that the extraction module, also
For when destination node and identical neighbors transmission time slot, neighbors user being extracted in neighbors broadcast message is obtained
ID；
The contrast module, is additionally operable to contrast destination node ID and neighbors ID size；
The processing module, if being additionally operable to destination node ID more than neighbors ID, when neighbors obtains the transmitting
Gap, destination node find new transmission time slot.
10. the sychronisation of time division multiple acess self-organizing network as claimed in claim 9, it is characterised in that also include：
Analysis operation module, if being additionally operable to the broadcast message that neighbors can not demodulate destination node within the object time, target
Node reselects transmission time slot.
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