CN105722241B - The dispatching method of the synchronous self-organizing network of multichannel - Google Patents
The dispatching method of the synchronous self-organizing network of multichannel Download PDFInfo
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The present invention relates to a kind of dispatching methods of the synchronous self-organizing network of multichannel, it is to the multichannel self-organizing network using time division way, time-domain resource is divided into continuous time frame, each time frame is divided into a control subframe and a data burst, it include multiple control time slots in each control subframe, it include multiple data slots in each data burst, data slot includes multiple physical channels, multiple nodes of the synchronous self-organizing network of composition multichannel can use different physical channels simultaneously, but each node can only use a physical channel to carry out sending or receiving message in the same time；Control time slot in control subframe is allocated using the slow allocation mode of Lothrus apterus.The present invention is able to achieve the running time-frequency resource Lothrus apterus distribution of the synchronous self-organizing network of multichannel, avoids the wasting of resources, while can guarantee the QOS index such as time delay and handling capacity.
Description
Technical field
The present invention relates to a kind of dispatching method, especially a kind of multichannel synchronizes the dispatching method of self-organizing network, belongs to
The technical field of cordless communication network.
Background technique
Multichannel synchronizes self-organizing network, is the self-organizing network that a kind of the whole network is synchronous, frequency domain possesses multiple physical channels,
The features such as possessing low time delay, high-throughput, high capacity, wherein node can be but be not limited to relay node, base station, shifting
The wireless telecom equipments such as dynamic terminal.
Existing list transceiver multichannel, which synchronizes self-organizing network MAC protocol, mainly MMAC(Multi-channel
Media Access Control), TMMAC(TDMA based MMAC), SCCH(Slotted Seeded
ChannelHopping), these three protocol channels access modes are all CSMA(Carrier Sense Multiple
Access), RTS(Request To send is passed through come busy channel by monitor channel and random back mechanism)/CTS
(Clear To Send) signal solves the problems, such as concealed terminal, and the transmission of RTS/CTS grouping has blindness, when number of nodes compared with
The probability to conflict between RTS/CTS grouping when more is bigger.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies in the prior art, a kind of synchronous self-organizing network of multichannel is provided
Dispatching method is able to achieve the running time-frequency resource Lothrus apterus distribution of the synchronous self-organizing network of multichannel, avoids the wasting of resources, while can
Guarantee the QOS(Quality of such as time delay and handling capacity Service) index.
According to technical solution provided by the invention, the dispatching method of the synchronous self-organizing network of the multichannel, when to using
The multichannel self-organizing network for the mode of dividing, is divided into continuous time frame for time-domain resource, and each time frame is divided into control
Frame and a data burst, it includes multiple data in each data burst that interior each control subframe, which includes multiple control time slots,
Time slot, data slot include multiple physical channels, and multiple nodes of the synchronous self-organizing network of composition multichannel can be simultaneously using not
Same physical channel, but each node can only use a physical channel carry out sending or receiving message in the same time；To control
Control time slot in system frame is allocated using the slow allocation mode of Lothrus apterus.
The length of each time frame is identical, when the topology of the synchronous self-organizing network of multichannel generates variation, passes through node tune
Degree module carries out the distribution of control time slot.
The process that the node scheduling module carries out control time slot allocation includes the following steps:
Step s1, node set to be allocated is determined；
Step s2, the node set of each node reusable control time slot is determined；
Step s3, control time slot sets to be allocated are determined；
Step s4, according to above-mentioned node set to be allocated, each node reusable control time slot node set and
Control time slot sets to be allocated carry out control time slot allocation, and not conflict mutually between each control time slot.
In step s1, by all nodes in the synchronous self-organizing network of multichannel be determined as in node set to be allocated to
Distribution object；In step s2, any node in distribution node set is treated as present node, it will be in node set to be allocated
The node that double bounce and the above distance are differed with all neighbor nodes of present node controls time slot node as reusable, according to described
Reusable control time slot node determines the node set of each node reusable control time slot, and can use multiplexing according to each node
The node set for controlling time slot determines mutually multiplexing subset.
In step s3, control number of time slots threshold value is determined, if the number of nodes in the synchronous self-organizing network of multichannel is little
When controlling number of time slots threshold value, every time frame controls the number of time slot to snap to the whole of number of nodes recently 2 on number of nodes
Power for several times；When the number of nodes in the synchronous self-organizing network of multichannel is greater than control number of time slots threshold value, every frame controls time slot
Number be control number of time slots threshold value.
In the step s4, specific assigning process are as follows: a control time slot is taken out from time slot sets to be allocated, from wait divide
With one node of taking-up in node set, and using the node as current distribution node, the control time slot allocation of taking-up is given
Current distribution node rejects current distribution node from node set to be allocated, controls from the reusable of current distribution node
The most mutual multiplexing subset of element is found in the node set of time slot, and the control time slot of the taking-up is equally distributed into phase
The mutually node in multiplexing subset, and the control time slot of taking-up is rejected from time slot sets to be allocated, until to time slot to be allocated
All control time slots in set are all allocated.
Control time slot in time slot sets to be allocated temporally successively take out by propulsion sequence, the section in node set to be allocated
Press the taking-up of node physical address incremental order；If there is member in the node set of the reusable control time slot of current distribution node
The identical maximum mutual multiplexing subset side by side of plain number, then randomly choose one group and be mutually multiplexed subset, by the control time slot of taking-up
Distribute to the node of selection mutually multiplexing subset.
Advantages of the present invention: by the way that time-domain resource is divided into control time slot and data slot, data slot includes multiple
Physical channel is realized the uncontested distribution to time slot and frequency point, is avoided by using the slow allocation of Lothrus apterus to control time slot
The wasting of resources, while can guarantee the QOS index such as time delay and handling capacity.
Detailed description of the invention
Fig. 1 is the schematic diagram that running time-frequency resource of the present invention divides.
Fig. 2 is the allocation process diagram of present invention control time slot.
Fig. 3 is the schematic diagram of node topology of the present invention.
Fig. 4 is another state diagram of node topology of the present invention.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
In order to be able to achieve the running time-frequency resource Lothrus apterus distribution of the synchronous self-organizing network of multichannel, the wasting of resources is avoided, simultaneously
Can guarantee the QOS(Quality of such as time delay and handling capacity Service) index, the synchronous self-organizing network of multichannel of the invention
Dispatching method, specifically: to the synchronous self-organizing network of multichannel using time division way, time-domain resource is divided into continuously
Each time frame is divided into a control subframe and a data burst, when including multiple controls in each control subframe by time frame
Gap, interior each data burst includes multiple data slots, and data slot includes multiple physical channels, and composition multichannel is synchronous from group
Multiple nodes of knitmesh network can use different physical channels simultaneously, but each node can only use a physics in the same time
Channel carries out sending or receiving message；Control time slot in control subframe is controlled using the slow allocation mode of Lothrus apterus
The distribution of time interval resource.
Specifically, when the synchronous self-organizing network of multichannel uses time division way, when time-domain resource is divided into continuous
The length of frame, each time frame is identical, and the specific length of time frame, which can according to need, carries out selection determination.It is synchronous from group in multichannel
When the topology of knitmesh network generates variation, the distribution of control time slot is carried out by node scheduling module.The topology changes and is
When referring to that arbitrary node discovery neighbor node changes and (increases or decreases), reported to node scheduling module, node scheduling
Module carries out the distribution of a secondary control time slot.In the embodiment of the present invention, slow allocation refers to non real-time distribution, but self-organization network
The primary new distribution of change in topology triggering of network.
The process that the node scheduling module carries out control time slot allocation includes the following steps:
Step s1, node set to be allocated is determined；
Step s2, the node set of each node reusable control time slot is determined；
Step s3, control time slot sets to be allocated are determined；
Step s4, according to above-mentioned node set to be allocated, each node reusable control time slot node set and
Control time slot sets to be allocated carry out control time slot allocation, and not conflict mutually between each control time slot.
In the embodiment of the present invention, in step s1, all nodes in the synchronous self-organizing network of multichannel are determined as wait divide
With the object to be allocated in node set.
In step s2, any node in distribution node set is treated as present node, it will be in node set to be allocated
The node that double bounce and the above distance are differed with all neighbor nodes of present node controls time slot node as reusable, according to described
Reusable control time slot node determines the node set of each node reusable control time slot, and can use multiplexing according to each node
The node set for controlling time slot determines mutually multiplexing subset.Node in present node and mutually multiplexing subset can share one
Time slot is controlled, interference and collision will not be generated.
In step s3, control number of time slots threshold value is determined, if the number of nodes in the synchronous self-organizing network of multichannel is little
When controlling number of time slots threshold value, every time frame controls the number of time slot to snap to the whole of number of nodes recently 2 on number of nodes
Power for several times；When the number of nodes in the synchronous self-organizing network of multichannel is greater than control number of time slots threshold value, every frame controls time slot
Number be control number of time slots threshold value.The specific size of control number of time slots threshold value, which can according to need, to be selected, specifically
Selection course is known to those skilled in the art, and details are not described herein again.
In the step s4, specific assigning process are as follows: a control time slot is taken out from time slot sets to be allocated, from wait divide
With one node of taking-up in node set, and using the node as current distribution node, the control time slot allocation of taking-up is given
Current distribution node rejects current distribution node from node set to be allocated, controls from the reusable of current distribution node
The most mutual multiplexing subset of element is found in the node set of time slot, and the control time slot of the taking-up is equally distributed into phase
The mutually node in multiplexing subset, and the control time slot of taking-up is rejected from time slot sets to be allocated, until to time slot to be allocated
All control time slots in set are all allocated.
Control time slot in time slot sets to be allocated temporally successively take out by propulsion sequence, the section in node set to be allocated
Press the taking-up of node physical address incremental order；If there is member in the node set of the reusable control time slot of current distribution node
The identical maximum mutual multiplexing subset side by side of plain number, then randomly choose one group and be mutually multiplexed subset, by the control time slot of taking-up
Distribute to the node in selection mutually multiplexing subset.
In addition, when the number of nodes in the synchronous self-organizing network of multichannel is less than or equal to control number of time slots threshold value,
Will appear node set to be allocated is empty situation, according to allocation result before by remaining control time slot duplicate allocation to each
A node；When the number of nodes in the synchronous self-organizing network of multichannel is greater than control number of time slots threshold value, control number of time slots is
Control number of time slots threshold value, it may appear that control time slot sets to be allocated are empty situation, and next time frame will continue as unappropriated
Node distribution control time slot, if this frame control time slot is all assigned, completion that node is also unallocated will then continue to distribute next
Frame controls time interval resource, and until all nodes are assigned, when node is assigned, current time frame control time slot is not yet distributed
At then according to the distribution remaining control time slot of current time frame of allocation result before.
In conjunction with Fig. 1 ~ Fig. 4, dispatching method of the invention is further described, Fig. 1 gives a kind of this system time-frequency
Resource divides schematic diagram.Time-domain resource is divided into continuous time frame, the equal length of each time frame can be according to node number
It can be specifically 4ms, 10ms or 20ms etc., this length is not as limitation of the present invention, only come frame length when determining
Illustrate to use, when it is implemented, when frame length be 10ms, as shown in figure 1 t0 ~ t1；By each time frame be divided into a control subframe (t0 ~
) and a data burst (t2 ~ t1) t2；Control sub-frame division is multiple control time slots, controls the number of time slot according to node
It counts with threshold value (the most numbers of the threshold value, that is, every frame control time slot, 20,32 etc. can be set to, be not specifically limited) and determines,
The length of control time slot is determined that the length for controlling subframe controls the length of time slot by control information size and physical-layer techniques
Multiplied by the number of control time slot, the single frequency point of control Time Slot Occupancy, such as the f0 channel in figure, all nodes are controlling time slot all
It monitors this channel or sends control information；Data burst is divided into multiple data slots, controls time slot and data slot
Length can be unequal, and the data slot number in data burst can be 64,128 or 256 etc., this number is not as to this
The limitation of invention only illustrates to use, when it is implemented, data slot number be 128, when frame length subtract control subframe lengths
That is data burst length, data burst length is divided by data slot number, that is, data slot length；Data slot includes multiple objects
Channel is managed, such as this six physical channels of f0 ~ f5 in figure, the channel number of the present invention is not limited thereto figure, channel number is taken
The channel condition and bandwidth certainly possessed in system, multiple nodes can use different channels simultaneously, but a node is at one
Moment is only sent or is received information using a channel.
Fig. 2 gives control time slot allocation flow chart, and a secondary control timeslot scheduling process is triggered by change in topology, such as new section
The factors such as online, the old node of point goes offline, node motion cause topology to change, and do not do excessive explanation herein.
Fig. 3 is a self-organized network nodes example topology, and wherein lightning mark represents node transmission information and can reach
Distance, PID represents the physical address of node, behind node number represented with physical address.It is that representative is introduced specifically using this figure
Scheduling process, scheduling mechanism of the invention is not limited thereto topological structure.
Specifically, node 5 is to possess the most node of neighbor node number in this network, is selected as host node (scheduling
Person), (all nodes all include scheduler module) is allocated to control time slot by the scheduler module of node 5.The topology knot of Fig. 4
Structure is that the node 4 in Fig. 3 goes offline, can be to host node (section after neighbor node 3, neighbor node 5, neighbor node 10 detect
5) point is reported that host node accordingly modifies the reusable control time slot node set of each node, since node 5 is exactly main section
Point, host node re-starts the resource allocation of a secondary control time slot at this time.
It determines control number of time slots to be allocated: determining the control number of time slots threshold value of each time frame first, when it is implemented,
Controlling number of time slots threshold value is 16, this number only illustrates to use not as limitation of the present invention.In the topological structure of Fig. 4,
One shares 9 nodes, node number is less than control number of time slots threshold value, controls that node number is snapped in number of time slots is nearest
2 integral number power, i.e., 16；Each time frame includes 16 control time slots, and number is 0 ~ 15, when host node is needed this 16 control
Gap specifically distributes to each node.If next secondary control time slot allocation not yet triggers, node periodically presses the control of this sub-distribution
Time slot processed sends control information.
By a jump of each node maintenance and two-hop neighbors, when host node is the one reusable control of each node maintenance
The node set of gap, when the node set interior joint and present node of the reusable control time slot can be used simultaneously a control
Gap will not interfere with each other, and the node in the node set of reusable control time slot must satisfy all neighbours with present node
Node differs node of the double bounce or more in this condition, the node set of reusable control time slot as change in topology exists
Variation.Further determine that in this set can node mutually in the node set of reusable control time slot mutual multiplexing it is sub
Collection, i.e., the described mutual multiplexing subset interior joint can with current distribution node share a control time slot, will not generate interfere with
Collision.
In the topological structure of Fig. 4, the multiplexer node set of node 1 includes node 3,6,7,9,10, mutually multiplexing subset
For (3,7,9), (6), (9,10)；The multiplexer node set of node 2 includes node 7, and being mutually multiplexed subset is (7)；Node 3 is answered
With node set include node 1,7,9, mutually be multiplexed subset be (1,7,9),；The multiplexer node collection of node 5 is combined into sky；Node 6
Multiplexer node set include node 1, mutually be multiplexed subset be (1)；The multiplexer node set of node 7 includes node 1,2,3,9,
Mutually multiplexing subset is (1,3,9)；The multiplexer node collection of node 8 is combined into sky；The multiplexer node set of node 9 include node 1,3,
7,10, being mutually multiplexed subset is (1,3,7), (1,10)；The multiplexer node set of node 10 includes node 1,9, mutually multiplexing
Collection is (1,9).
The topology of Fig. 4 is that the node 4 in Fig. 3 goes offline, and topology changes at this time, and host node 5 needs weight after detecting
New distribution control time interval resource, process are as follows:
Be allocated from node physical address is ascending, take out node 1, for its distribute control time slot 0, node 1 can
The node set of multiplexing control time slot includes node 3,6,7,9,10, can simultaneously and the mutual multiplexing time slot subset of node 1 is (i.e. mutual
Between all reusables) have { (3,7,9), (6), (9,10) }, the largest number of multiplexer node is 3, i.e., the first is combined, 3,
7,9 } also assigned slot 0.
Node 2 is taken out, distributes time slot 1 for it, the node set of the reusable control time slot of node 2 only has node 7, node
7 also assigned slot 1.
Node 3 is taken out, time slot 2 is distributed for it, all can be mutually multiplexed between multiplexing set { 1,7,9 }, { 1,7,9 } same to quilt
Distribute time slot 2.
Ibid successively by remaining node, all distribution controls time slot to method, when node is all assigned control time slot meeting
It is assigned to time slot 8, remaining 7 time slots (9 ~ 15) are accordingly allocated according to the allocation result of time slot 0 ~ 6.
This embodiment example only by node go offline lead to change in topology for illustrate, remaining situation can be processed similarly, herein
It does not elaborate.
For the present invention by the way that time-domain resource is divided into control time slot and data slot, data slot includes multiple number
Frame realizes the uncontested distribution to time slot and frequency point, avoids resource unrestrained by using the slow allocation of Lothrus apterus to control time slot
Take, while can guarantee the QOS index such as time delay and handling capacity.
Claims (2)
1. a kind of dispatching method of the synchronous self-organizing network of multichannel, it is characterized in that: to the multichannel using time division way from group
Time-domain resource is divided into continuous time frame by knitmesh network, and each time frame is divided into a control subframe and a data burst,
Include multiple control time slots in each control subframe, include multiple data slots in each data burst, data slot includes more
Multiple nodes of a physical channel, the synchronous self-organizing network of composition multichannel can use different physical channels simultaneously, but each
Node can only use a physical channel to carry out sending or receiving message in the same time；Control time slot in control subframe is adopted
It is allocated with the slow allocation mode of Lothrus apterus;The slow allocation refers to non real-time distribution, but self-organizing network is opened up
Flutter the primary new distribution of change triggers;
The length of each time frame is identical, when the topology of the synchronous self-organizing network of multichannel generates variation, passes through node scheduling mould
Block carries out the distribution of control time slot;
The process that the node scheduling module carries out control time slot allocation includes the following steps:
Step s1, node set to be allocated is determined；
Step s2, the node set of each node reusable control time slot is determined；
Step s3, control time slot sets to be allocated are determined；
Step s4, according to above-mentioned node set to be allocated, the node set of each node reusable control time slot and wait divide
Control time slot allocation is carried out with control time slot sets, and not conflict mutually between each control time slot;
In the step s4, specific assigning process are as follows: a control time slot is taken out from time slot sets to be allocated, from section to be allocated
A node is taken out in point set, and using the node as current distribution node, by the control time slot allocation of taking-up to current
Distribution node rejects current distribution node from node set to be allocated, controls time slot from the reusable of current distribution node
Node set in find the most mutual multiplexing subset of element, and the control time slot of the taking-up equally distributed to mutually multiple
With the node in subset, and the control time slot of taking-up is rejected from time slot sets to be allocated, until to time slot sets to be allocated
In all control time slots be all allocated;
Control time slot in time slot sets to be allocated temporally successively take out by propulsion sequence, and the node in node set to be allocated is pressed
Node physical address incremental order is taken out；If in the node set of the reusable control time slot of current distribution node, there are elements
The identical maximum mutual multiplexing subset side by side of number, then randomly choose one group and be mutually multiplexed subset, by the control time slot allocation of taking-up
To the node of selection mutually multiplexing subset;
In step s1, all nodes in the synchronous self-organizing network of multichannel are determined as to be allocated in node set to be allocated
Object；In step s2, treat any node in distribution node set as present node, by node set to be allocated with work as
All neighbor node difference double bounces of front nodal point and the node of the above distance control time slot node as reusable, are answered according to described
The node set of each node reusable control time slot is determined with control time slot node, and multiplexing control can be used according to each node
The node set of time slot determines mutually multiplexing subset.
2. the dispatching method of the synchronous self-organizing network of multichannel according to claim 1, characterized in that in step s3, really
Surely number of time slots threshold value is controlled, if the number of nodes in the synchronous self-organizing network of multichannel is no more than control number of time slots threshold value
When, the number of every time frame control time slot is that 2 nearest integral number power of number of nodes is snapped on number of nodes；When multichannel is synchronous
When number of nodes in self-organizing network is greater than control number of time slots threshold value, the number of every frame control time slot is control number of time slots
Threshold value.
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| JP6955880B2 (en) * | 2017-03-17 | 2021-10-27 | 株式会社東芝 | Wireless communication system and wireless communication method |
| CN107567101B (en) * | 2017-09-11 | 2021-01-19 | 海能达通信股份有限公司 | Time slot multiplexing method, device and communication equipment |
| WO2019047200A1 (en) * | 2017-09-11 | 2019-03-14 | 海能达通信股份有限公司 | Time slot multiplexing method and apparatus, and communication device |
| CN109257824B (en) * | 2018-08-31 | 2021-05-14 | 西安电子科技大学 | Resource scheduling method based on TD-LTE self-organizing network |
| CN112469061B (en) * | 2020-12-14 | 2023-11-03 | 北京升哲科技有限公司 | Application method, device, equipment and storage medium of network resources |
| CN114449668B (en) * | 2022-04-12 | 2022-12-09 | 希诺麦田技术（深圳）有限公司 | Time slot expansion method, system and equipment |
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