CN106470097B - Right of speech seizes the method that collision avoids in a kind of ad hoc network - Google Patents
Right of speech seizes the method that collision avoids in a kind of ad hoc network Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000009191 jumping Effects 0.000 claims abstract description 7
- 230000001360 synchronised effect Effects 0.000 claims description 11
- 230000001960 triggered effect Effects 0.000 claims description 8
- 238000013468 resource allocation Methods 0.000 claims 1
- 230000000977 initiatory effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 206010011878 Deafness Diseases 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 231100000895 deafness Toxicity 0.000 description 1
- 208000016354 hearing loss disease Diseases 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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Abstract
The present invention proposes that right of speech seizes the method that collision avoids in a kind of ad hoc network, comprising: right of speech preempting resources pond is divided into several mutually orthogonal running time-frequency resources；In seizing with a right of speech, each terminal occupies the mutually orthogonal running time-frequency resource transmission right of speech and seizes message.If the right of speech that terminal does not receive high priority terminal after a right of speech seizes the time seizes message, carry out secondary right of speech and seize, the secondary right of speech seizes access when jumping using frequency hopping.
Description
Technical field
The present invention relates to rights of speech in wireless self-networking field more particularly to a kind of ad hoc network to seize the method that collision avoids.
Background technique
The synchronous right of speech method for pre-emptively of self-organizing network common at present, main flow include that right of speech promoter transmission right of speech is robbed
Message is accounted for, other terminals receive right of speech and seize message and forward；If right of speech promoter do not receive whithin a period of time it is other more
The right of speech that high priority terminal is initiated seizes message, then right of speech seizes success；Otherwise, right of speech seizes failure.The right of speech seizes stream
Cheng Zhong, non-cooperating diversity pass-through mode, it will cause broadcast storm, especially when having multiple terminals while initiating right of speech and seize
It waits；Therefore more to use collaboration diversity pass-through mode, but when having multiple terminals while initiating right of speech and seize, cooperation divides
Collection pass-through mode bring " deaf problem " and " near-far interference " cannot ensure that multiple right of speech promoters can receive other side
Right of speech seize message so that multiple right of speech promoters simultaneously initiate group service, group service collides.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes that right of speech seizes the method that collision avoids in a kind of ad hoc network, comprising: by right of speech
Preempting resources pond is divided into several mutually orthogonal running time-frequency resources；In seizing with a right of speech, each terminal occupies described mutual
Orthogonal running time-frequency resource sends right of speech and seizes message.
Further, further includes: the terminal is after a right of speech seizes the time, if not receiving high priority end
The right of speech at end seizes message, then carries out secondary right of speech and seize, and the secondary right of speech seizes access when jumping using frequency hopping.
Further, the secondary running time-frequency resource seized and the time-frequency resource allocating once seized meet following condition:
In time domain: each terminal that identical time slot is occupied in a right of speech is seized occupies mutually not phase in secondary right of speech is seized
Same time slot；
On frequency domain: the different frequency domain positions that the same terminal occupies in right of speech twice is seized.
Further, the running time-frequency resource that the same terminal occupies in right of speech twice is seized is completely orthogonal.
Further, the right of speech seizes the synchronous access of support and/or asynchronous access.
Further, the synchronous access further include: each right of speech seizes source terminal and jumps time domain the 1 of right of speech preempting resources pond
Position sends right of speech and seizes message, respectively receives the right of speech and seizes the terminal of message and is turned in the time-domain position of hop count+1
Hair.
Further, further includes: if the right of speech seizes source terminal and receives priority and robs higher than other rights of speech of this terminal
Message is accounted for, then other described rights of speech is forwarded to seize message.
Further, asynchronous access includes:
When the right of speech, which seizes the triggered time, to be in right of speech preempting resources pond, the right of speech seizes source terminal nearest
Right of speech message send position and send the right of speech and seize message；
When the right of speech, which seizes the triggered time, to be in outside right of speech preempting resources pond, the right of speech seizes source terminal in right of speech
Preempting resources pond 1 jumps time-domain position and generates random back, if to priority is not received at the end of random back higher than this terminal
Other rights of speech seize message, then the right of speech for sending this terminal seizes message.
Further, further includes: if respectively power terminal receives multiple rights of speech and seizes message, forward wherein highest priority
Right of speech seizes message.
With presently, there are compared with the synchronous right of speech method for pre-emptively of self-organizing network, the present invention provides a kind of orthogonalization right of speech and robs
The right of speech for accounting for resource pool seizes collision avoidance method, uniquely determines a right of speech in raising right of speech preemption processes and seizes winner's
Probability reduces the collision probability of group service, and the group service for further decreasing the right of speech person of seizing initiates time delay.
Detailed description of the invention
Fig. 1 is that the resource pool of embodiment 1 distributes schematic diagram；
Fig. 2 is the right of speech preempting resources pond pattern of embodiment 1；
Fig. 3 is that the right of speech of embodiment 1 seizes flow chart；
Fig. 4 is that the asynchronous access transmission right of speech of one kind of embodiment 2 seizes message schematic diagram；
Fig. 5 is that the asynchronous access transmission right of speech of another kind of embodiment 2 seizes message schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
One embodiment of the present of invention proposes that right of speech seizes the method that collision avoids in a kind of ad hoc network, comprising: by right of speech
Preempting resources pond is divided into several mutually orthogonal running time-frequency resources；In seizing with a right of speech, each terminal occupies described mutual
Orthogonal running time-frequency resource sends right of speech and seizes message.
In one alternate embodiment, terminal is after a right of speech seizes the time, if not receiving high priority end
The right of speech at end seizes message, then carries out secondary right of speech and seize, and the secondary right of speech seizes access when jumping using frequency hopping.
In one alternate embodiment, the secondary running time-frequency resource seized meets as follows with the time-frequency resource allocating once seized
Condition: in time domain: occupied in a right of speech is seized identical time slot each terminal occupied in secondary right of speech is seized it is different
Time slot；On frequency domain: the different frequency domain positions that the same terminal occupies in right of speech twice is seized.
In one alternate embodiment, the running time-frequency resource that the same terminal occupies in right of speech twice is seized is completely orthogonal.
In one alternate embodiment, the right of speech seizes the synchronous access of support and/or asynchronous access.
In one alternate embodiment, synchronous access further include: each right of speech seizes source terminal the 1 of right of speech preempting resources pond
Jump time-domain position and send right of speech and seize message, respectively receive the right of speech seize the terminal of message hop count+1 time-domain position into
Row forwarding.
In one alternate embodiment, if the right of speech seizes source terminal and receives other rights of speech that priority is higher than this terminal
Message is seized, then other described rights of speech is forwarded to seize message.
In one alternate embodiment, the asynchronous access includes: to seize the triggered time when the right of speech to rob in right of speech
When accounting in resource pool, the right of speech seizes source terminal and seizes message in the nearest right of speech message transmission position transmission right of speech；
When the right of speech, which seizes the triggered time, to be in outside right of speech preempting resources pond, the right of speech seizes source terminal in right of speech preempting resources
Pond 1 jumps time-domain position and generates random back, if to other rights of speech for not receiving priority at the end of random back and being higher than this terminal
Message is seized, then the right of speech for sending this terminal seizes message.
In one alternate embodiment, further includes: seize message if respectively weighing terminal and receiving multiple rights of speech, forward wherein excellent
The first highest right of speech of grade seizes message.
With presently, there are compared with the synchronous right of speech method for pre-emptively of self-organizing network, the present invention provides a kind of orthogonalization right of speech and robs
The right of speech for accounting for resource pool seizes collision avoidance method, uniquely determines a right of speech in raising right of speech preemption processes and seizes winner's
Probability reduces the collision probability of group service, and the group service for further decreasing the right of speech person of seizing initiates time delay
Embodiment 1: orthogonalization right of speech preempting resources pond
The right of speech preempting resources pond of orthogonalization colony terminal: right of speech preempting resources pond is associated with Termination ID, is reduced
Multiple terminals seize the probability of the same resource pool simultaneously.Under conditions of resource pool position is abundant, two are provided for colony terminal
Secondary right of speech preemption techniques guarantee, while the frequency hopping access technology when using jump in terms of secondary right of speech seizes access, colony terminal exist
Right of speech twice is carried out before initiating group service to seize, and the position that second of right of speech seizes the resource pool of occupancy needs to meet such as
Lower condition:
In time domain: indicating the time slot position that terminal i occupies with Time (i)；If in first time right of speech preemption processes, occupied
The terminal of time slot j is A, B, C, meets Time (A)=Time (B)=Time (C)=j, then in second of right of speech preemption processes,
Guarantee Time (A)~=Time (B)~=Time (C)；
On frequency domain: the same terminal twice right of speech seize occupancy frequency domain position it is different.
Referring to FIG. 1, it is fixed resource associated with hop count information pond, group service that right of speech, which seizes message to send position,
Resource pool is the method for salary distribution of fixation associated with colony terminal or seizes promoter's instruction by right of speech.I.e. all rights of speech
It seizes source terminal and jumps time-domain position transmission message 1；All time domain positions of the terminal in hop count+1 for receiving right of speech and seizing message
Forwarding message is set, and so on, until right of speech, which seizes instruction message, propagates to the whole network.
(1) orthogonalization right of speech preempting resources pond
Assuming that there are N (N=16) a terminals in self-organizing network, is divided into a group of M (M=4) and exhales group, then it is every in design drawing 1
One jump is a subframe, each sub-frame division is 4 time slots (Slot), has 4 available resource locations, such as Fig. 2 on frequency domain
Shown, priority-level is that the terminal transmission right of speech of j (j=1,2 ..., N/M) is seized in { i, j } expression group i (i=1,2,3,4)
Resource pool.
If terminal is supported to carry out 2 right of speech preemption processes before initiating group service, the same terminal is twice
The time domain and frequency domain position that initiation right of speech is seized are completely orthogonal, in Fig. 2, terminal { 1,1 } occupancy when first time, right of speech was seized
Time slot 1, frequency 1；When second of right of speech is seized, time slot 4, frequency 4 are occupied.The process that different users seizes in right of speech twice
In will not occupy identical time-domain resource, for example, in first time right of speech preemption processes { 1,1 }, { 1,2 }, { 1,3 } and { Isosorbide-5-Nitrae }
Time slot 1 is occupied, in second of right of speech preemption processes { 1,1 }, { 1,2 }, the time slot that { 1,3 } and { Isosorbide-5-Nitrae } occupies is respectively 4,3,2
With 1.
If scheme does not support that right of speech is seized twice, after in first time, right of speech seizes end, that is, judge whether to need
Initiate group service.
(2) right of speech preemption processes
Assuming that terminal { 1,2 } and terminal { Isosorbide-5-Nitrae } seize process in similar time trigger right of speech, then terminal { 1,2 } and 1,
4 } it need to wait until that a jump time-domain position initiates right of speech and seizes message, process is as shown in Figure 3.
Step<1>: terminal { 1,2 } and { 1,4 } are when 1 jump position occupies the initiation of the first time in Fig. 2 right of speech respectively and seizes
Resource location send right of speech seize message；
Step<2>: neighbor terminal i, j more all rights of speech to be forwarded received seize the priority of message, and 2
Jump position occupancy right of speech seizes the highest terminal of message priority and forwards its right of speech to seize in the running time-frequency resource pond that 1 jump position occupies
Message.Such as terminal i receives the message of { 1,2 } and { Isosorbide-5-Nitrae }, then { 1,2 } the resource pool forwarding terminal { 1,2 } for jumping position 2
Right of speech seizes message.The process is recycled, until first time right of speech seizes end cycle；If scheme support secondary right of speech seize into
Enter step 3；Otherwise 5. are entered step
Step<3>: source terminal { 1,2 } and { 1,4 } detect whether that the right of speech for receiving the transmission of higher priority terminal is seized and disappear
Breath: if received, then it represents that right of speech seizes failure, will not signalling of bouquet business；If do not received, time-frequency figure is occupied
Resource pool sends right of speech and seizes message when second of right of speech of sample is seized；
Step<4>: the right of speech that neighbor terminal receives source terminal seizes message, and the highest right of speech of forwarding priority, which is seized, to disappear
Breath；
Step<5>: right of speech, which seizes the time, to be terminated, and terminal { 1,2 } is ready for sending group service, terminal { Isosorbide-5-Nitrae } according to whether
The right of speech for receiving { 1,2 } seizes message, decides whether to initiate group service: if terminal { Isosorbide-5-Nitrae } receives the message of { 1,2 }, eventually
End { 1,4 } will not initiate group service again；If terminal { Isosorbide-5-Nitrae } does not receive the message of { 1,2 }, terminal { Isosorbide-5-Nitrae } thinks this end
It holds successfully to rob and accounts for right of speech, and initiate group service.
Embodiment 2: asynchronous access
Allow terminal to seize time nearest right of speech in distance triggering right of speech and seize instruction information and send resource pool and transmits words
Power seizes message, without waiting the synchronous right of speech of initiating of multiple terminals to seize message.
It is identical as other terminal selections to reduce when control domain resource location is deficienter relative to colony terminal number
Resource pool and generate collision, asynchronous access right of speech can be supported to seize process.The resource pool allocation plan and right of speech of the program
Message transmission flow is seized with embodiment 1, asynchronous access procedure divides following two scene description.
When right of speech, which seizes the triggered time, to be in right of speech preempting resources pond, words are sent in nearest right of speech preempting resources pond
Power seizes message.It is jumped as shown in figure 4, terminal is just jumped the 2 of right of speech preempting resources pond when triggering right of speech and seizing process with 3
Between, then the terminal directly sends right of speech in 3 jump positions and seizes message.
When right of speech, which seizes the triggered time, to be in outside right of speech preempting resources pond, i.e. the transmission right of speech of distance seizes the position of message
It is set to 1 jump, terminal jumps position 1 and generates random back clock, and when random back clock is 0, if not yet
It receives right of speech and seizes message, then send right of speech and seize message.
As shown in figure 5, terminal 1, in right of speech preempting resources pond, external trigger right of speech seizes process to terminal 2, it is assumed that terminal 2 compares
The priority of terminal 1 is high, and the hop count of keeping out of the way of the generation of terminal 1 is 5 jumps, and it is 3 jumps that terminal 2 generated, which keeps out of the way hop count,.
Step 1: terminal 2 sends right of speech in 3 jump positions and seizes message；
Step 2: 1 hop neighbor terminal of terminal 2 seizes message in the right of speech that 4 jump position forwardings receive；2 hop neighbor terminals exist
The right of speech that 4 jump position forwardings receive seizes message；
Step 3: jumping position 5, the right of speech of 3 hop neighbor forwarding terminals 2 of terminal 2 seizes message, and terminal 1 keeps out of the way clock
It is 0, terminal 1 detects whether that the right of speech for receiving terminal 2 seizes message；
If received, judge the priority of this terminal and terminal 2: the priority of this terminal is high, then sends this terminal
Right of speech seizes message；The priority of terminal 2 is high, then the right of speech for not retransmiting this terminal seizes message, and the right of speech of forwarding terminal 2 is robbed
Account for message；
If do not received, right of speech is sent in 5 jump positions and seizes message；
Step 4: jumping position 6, all rights of speech that terminal judgement receives seize message, if receiving only a words
Power seizes message, then forwards the right of speech to seize message in 6 jump positions, if receiving multiple rights of speech seizes message, only forward most
The right of speech of high priority seizes message.Repetitive process 4, seizing specified time until right of speech terminates.
It can be seen from above-described embodiment that orthogonalization right of speech preempting resources pond, so that multiple rights of speech seize promoter's
Right of speech seizes message and will not collide；Frequency hopping access technology to be not in " deafness " problem between terminal when jump；It supports
Multiple groups group service is concurrent；Asynchronous access mechanism can reduce synchronous access procedure bring collision probability.The present invention gives
Self-organizing network right of speech seizes the method that collision avoids, so that in right of speech preemption processes, it is most fast to be determined in group system
And uniquely determine a right of speech and seize winner, reduce the collision probability of group service.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (8)
1. right of speech seizes the method that collision avoids in a kind of ad hoc network characterized by comprising
Right of speech preempting resources pond is divided into several mutually orthogonal running time-frequency resources；
In seizing with a right of speech, each terminal occupies the mutually orthogonal running time-frequency resource transmission right of speech and seizes message；
Further include: the terminal is after a right of speech seizes the time, if the right of speech for not receiving high priority terminal is seized
Message then carries out secondary right of speech and seizes, and the secondary right of speech seizes access when jumping using frequency hopping.
2. the method according to claim 1, wherein the secondary running time-frequency resource seized with once seize when
Frequency resource allocation meets following condition:
In time domain: occupied in a right of speech is seized identical time slot each terminal occupied in secondary right of speech is seized it is mutually different
Time slot；
On frequency domain: the different frequency domain positions that the same terminal occupies in right of speech twice is seized.
3. the method according to claim 1, wherein the time-frequency that the same terminal occupies in right of speech twice is seized
Resource is completely orthogonal.
4. method according to any one of claims 1 to 3, which is characterized in that the right of speech seizes the synchronous access of support
And/or asynchronous access.
5. according to the method described in claim 4, it is characterized in that, the synchronous access further include:
Each right of speech seizes 1 jump time-domain position transmission right of speech of the source terminal in right of speech preempting resources pond and seizes message, respectively receives institute
It states right of speech and seizes the terminal of message and be forwarded in the time-domain position of hop count+1.
6. according to the method described in claim 5, it is characterized by further comprising:
If the right of speech seizes source terminal and receives priority and seizes message higher than other rights of speech of this terminal, forwarding it is described other
Right of speech seizes message.
7. according to the method described in claim 4, it is characterized in that, the asynchronous access includes:
When the right of speech, which seizes the triggered time, to be in right of speech preempting resources pond, the right of speech seizes source terminal recently
Power message sends the position transmission right of speech and seizes message；
When the right of speech, which seizes the triggered time, to be in outside right of speech preempting resources pond, the right of speech is seized source terminal and is seized in right of speech
Resource pool 1 jumps time-domain position and generates random back, if to do not receive at the end of random back priority be higher than this terminal other
Right of speech seizes message, then the right of speech for sending this terminal seizes message.
8. according to method described in claim 5~7 any one, which is characterized in that further include: if respectively power terminal receive it is multiple
Right of speech seizes message, then the right of speech of wherein highest priority is forwarded to seize message.
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| CN1984382A (en) * | 2006-05-17 | 2007-06-20 | 华为技术有限公司 | Method for allocating and alternating speech right and related group calling system |
| CN102857881A (en) * | 2011-06-30 | 2013-01-02 | 中兴通讯股份有限公司 | Cluster group calling priority change method and method and system for call priority state management |
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| CN1984382A (en) * | 2006-05-17 | 2007-06-20 | 华为技术有限公司 | Method for allocating and alternating speech right and related group calling system |
| CN102857881A (en) * | 2011-06-30 | 2013-01-02 | 中兴通讯股份有限公司 | Cluster group calling priority change method and method and system for call priority state management |
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