CN107820219A - It is determined that the method that wireless network retransmits broadcast mechanism delay performance under the transmission time limit - Google Patents
It is determined that the method that wireless network retransmits broadcast mechanism delay performance under the transmission time limit Download PDFInfo
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- CN107820219A CN107820219A CN201710786070.8A CN201710786070A CN107820219A CN 107820219 A CN107820219 A CN 107820219A CN 201710786070 A CN201710786070 A CN 201710786070A CN 107820219 A CN107820219 A CN 107820219A
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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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0852—Delays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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- Computer Networks & Wireless Communication (AREA)
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- Environmental & Geological Engineering (AREA)
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Abstract
The invention provides a kind of method for determining that wireless network retransmits broadcast mechanism delay performance under the transmission time limit, the probability distribution being successfully decoded including the broadcast data determined without using acknowledgement mechanism within the transmission time limit, the probability distribution of broadcast data average delay within the transmission time limit is determined, and then determines the average delay of wireless network re-transmission broadcast mechanism under the transmission time limit.The present invention can carry out Accurate Prediction to the average delay for retransmitting broadcast according to network parameter, therefore effective implementation that broadcast mechanism can be retransmitted for wireless network provides help.
Description
Technical field
The present invention relates to the technical fields such as wireless network broadcast communication, more particularly to transmit wireless network under the time limit and retransmit extensively
Broadcast mechanism.
Background technology
In the wireless network broadcast communications field, radio broadcasting mechanism can be by broadcast message by a transmitting procedure because of it
The characteristic for being transferred to the thousands of network equipment is widely used in application to time-sensitive, satellite communication, disaster monitoring
With the field such as vehicle-mounted net safety applications.Because the characteristic acknowledgement mechanism of broadcast mechanism can not use, based on CDMA slotted ALOHA agreement
Re-transmission broadcast mechanism can improve the Successful transmissions probability of broadcast data, therefore on the premise of transmission probability improves, time delay
The research of performance is also a vital part.In addition, for the specifically application to time-sensitive such as disaster monitoring, transmission
Delay performance under time limit turns into the important performance indexes of numerous practical communication systems, and the accurate estimation to its performance can be nothing
Effective implementation of line network retransmission broadcast mechanism provides help.
It is determined that wireless network retransmits the method for the delay performance of broadcast mechanism to not studying also at present under the transmission time limit, because
This needs to retransmit broadcast mechanism delay performance method under a kind of determination transmission time limit based on closure expression formula.
The content of the invention
The present invention is intended to provide a kind of method for determining that wireless network retransmits broadcast mechanism delay performance under the transmission time limit, root
Accurate Prediction is carried out to the delay performance for retransmitting broadcast according to network parameter, effective implementation that broadcast mechanism is retransmitted for wireless network carries
For helping.
The present invention provides a kind of method for determining that wireless network retransmits broadcast mechanism delay performance under the transmission time limit, including M
The shared time slotted broadcast channel of the individual network equipment, the equipment send length as 1 in each time slot start time using probability a
The broadcast data of individual time slot, otherwise intercepts channel as recipient, without using acknowledgement mechanism.The broadcast data is in the transmission time limit
Time-out terminates to transmit when being repeatedly transmitted n times.It is determined that without using acknowledgement mechanism broadcast data transmission the time limit in by into
The probability distribution of work(decoding, it is determined that the probability distribution of each broadcast data time delay within the transmission time limit, and then determine the transmission time limit
Lower wireless network retransmits the average delay of broadcast mechanism.
Further, when wireless network retransmits broadcast mechanism under a kind of determination transmission time limit according to claim 1
The method of ductility energy, it is characterised in that：The delay performance calculating process for retransmitting broadcast mechanism includes：
S11. the probability distribution of broadcast data the number of transmissions within the transmission time limit without using acknowledgement mechanism is determined.Make CkTable
Show the event that same broadcast data is successfully decoded in k-th of time slot, the probability distribution of this event may be calculated：
S12. the probability distribution of each broadcast data time delay within the transmission time limit is determined.L (a, n, D)=k is made to represent broadcast
The propagation delay time of data is the event of k time slot, and the probability distribution of this event may be calculated：
Wherein, S (a, n, D) represents the broadcast data probability that receiving end is properly received within the transmission time limit.
S13. the probability distribution of broadcast data average delay within the transmission time limit is determined.
Further, when wireless network retransmits broadcast mechanism under a kind of determination transmission time limit according to claim 1
The method of ductility energy, it is characterised in that：Each equipment sends length as 1 time slot in each time slot start time using probability a
Broadcast data, channel otherwise is intercepted as recipient, without using acknowledgement mechanism.It is determined that exist without using the broadcast data of acknowledgement mechanism
The probability distribution being successfully decoded in the transmission time limit, it is determined that the probability distribution of each broadcast data time delay within the transmission time limit, enters
And determine the average delay of wireless network re-transmission broadcast mechanism under the transmission time limit.
Further, when wireless network retransmits broadcast mechanism under a kind of determination transmission time limit according to claim 1
The method of ductility energy, it is characterised in that：Each broadcast data terminates to pass when transmitting time limit time-out or being repeatedly transmitted n times
It is defeated.
Further, when wireless network retransmits broadcast mechanism under a kind of determination transmission time limit according to claim 1
The method of ductility energy, it is characterised in that：Once or more successfully can be by it in it repeats to transmit for each broadcast data
He is properly received the network equipment.
Further, when wireless network retransmits broadcast mechanism under a kind of determination transmission time limit according to claim 1
The method of ductility energy, it is characterised in that：When in a time slot one and only one packet transmit when, this packet be considered as by into
Work(transmits；When packet collides, all packets of collision can not be successfully received.
By analysis method proposed by the present invention, it is accurate the delay performance for retransmitting broadcast can be carried out according to network parameter
Prediction, effective implementation that broadcast mechanism is retransmitted for wireless network provide help.
The additional aspect of the present invention and advantage will be set forth in part in the description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 shows the inventive method design flow diagram.
Fig. 2 shows the theory of the lower delay performance distribution of the inventive method broadcast data different transmission time within the transmission time limit
Prediction and the comparison of simulation value.
Fig. 3 has gone out the inventive method broadcast data delay performance under the most the number of transmissions of the fixation different transmission time limits and has been distributed
Theoretical prediction and simulation value comparison.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are each to the present invention's
The modification of the kind equivalent form of value falls within the application appended claims limited range.
The present invention provides a kind of method for determining that wireless network retransmits broadcast mechanism delay performance under the transmission time limit, including M
The shared time slotted broadcast channel of the individual network equipment, the equipment send length as 1 in each time slot start time using probability a
The broadcast data of individual time slot, otherwise intercepts channel as recipient, without using acknowledgement mechanism.The broadcast data is in the transmission time limit
Time-out terminates to transmit when being repeatedly transmitted n times.
Preferably, the delay performance calculating process for retransmitting broadcast mechanism includes：S11. determine without using should
Answer the probability distribution of broadcast data the number of transmissions within the transmission time limit of mechanism.S12. determine each broadcast data in the transmission time limit
The probability distribution of interior time delay.S13. the probability distribution of broadcast data average delay within the transmission time limit is determined.
Preferably, the equipment sends broadcast of the length as 1 time slot in each time slot start time using probability a
Data, channel otherwise is intercepted as recipient, without using acknowledgement mechanism.
Preferably, the broadcast data terminates to transmit when transmitting time limit time-out or being repeatedly transmitted n times.
Preferably, once or more successfully can be by other nets in it repeats to transmit for the broadcast data
Network equipment is properly received.
Preferably, when one and only one packet transmits in a time slot, this packet is considered as by success
Transmission；When packet collides, all packets of collision can not be successfully received.
Claims (6)
1. a kind of method for determining that wireless network retransmits broadcast mechanism delay performance under the transmission time limit, including the M network equipment are total to
The time slotted broadcast channel enjoyed, each equipment send broadcast number of the length as 1 time slot in each time slot start time using probability a
According to otherwise intercepting channel as recipient, without using acknowledgement mechanism, each broadcast data is overtime when transmission time limit (D time slot)
Or terminate to transmit when being repeatedly transmitted n times.It is characterized in that：It is determined that without using the broadcast data of acknowledgement mechanism in the transmission time limit
The probability distribution being inside successfully decoded, it is determined that the probability distribution of each broadcast data time delay within the transmission time limit, and then determine to pass
Wireless network retransmits the average delay of broadcast mechanism under the defeated time limit.
A kind of 2. side for determining wireless network re-transmission broadcast mechanism delay performance under the transmission time limit according to claim 1
Method, it is characterised in that：The re-transmission broadcast mechanism average delay calculating process includes：
S11. the probability distribution of broadcast data the number of transmissions within the transmission time limit without using acknowledgement mechanism is determined.Make CkRepresent same
The event that one broadcast data is successfully decoded in k-th of time slot, the probability distribution of this event may be calculated：
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Wherein, S (a, n, D) represents the broadcast data probability that receiving end is properly received within the transmission time limit.
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A kind of 3. side for determining wireless network re-transmission broadcast mechanism delay performance under the transmission time limit according to claim 1
Method, it is characterised in that：Each equipment sends broadcast data of the length as 1 time slot in each time slot start time using probability a, no
Channel then is intercepted as recipient, without using acknowledgement mechanism.
A kind of 4. side for determining wireless network re-transmission broadcast mechanism delay performance under the transmission time limit according to claim 1
Method, it is characterised in that：Each broadcast data terminates to transmit when transmitting time limit time-out or being repeatedly transmitted n times.
A kind of 5. side for determining wireless network re-transmission broadcast mechanism delay performance under the transmission time limit according to claim 1
Method, it is characterised in that：Once or more successfully can be by other network equipments in it repeats to transmit for each broadcast data
It is properly received.
A kind of 6. side for determining wireless network re-transmission broadcast mechanism delay performance under the transmission time limit according to claim 1
Method, it is characterised in that：When one and only one packet transmits in a time slot, this packet, which is considered as, to be delivered successfully；When
When packet collides, all packets of collision can not be successfully received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710786070.8A CN107820219A (en) | 2017-09-04 | 2017-09-04 | It is determined that the method that wireless network retransmits broadcast mechanism delay performance under the transmission time limit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710786070.8A CN107820219A (en) | 2017-09-04 | 2017-09-04 | It is determined that the method that wireless network retransmits broadcast mechanism delay performance under the transmission time limit |
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| CN108174355A (en) * | 2017-08-18 | 2018-06-15 | 南京理工大学 | A kind of method that wireless network retransmits broadcast mechanism reliability under determining transmission time limit |
| CN112866028A (en) * | 2021-01-20 | 2021-05-28 | 重庆邮电大学 | Time slot allocation method for satellite time-sensitive network with wired and wireless integration |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108174355A (en) * | 2017-08-18 | 2018-06-15 | 南京理工大学 | A kind of method that wireless network retransmits broadcast mechanism reliability under determining transmission time limit |
| CN112866028A (en) * | 2021-01-20 | 2021-05-28 | 重庆邮电大学 | Time slot allocation method for satellite time-sensitive network with wired and wireless integration |
| CN112866028B (en) * | 2021-01-20 | 2022-07-12 | 重庆邮电大学 | Time slot allocation method for satellite time-sensitive network with wired and wireless integration |
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