CN105307282B - A kind of method and device preventing multiple users access interference - Google Patents
A kind of method and device preventing multiple users access interference Download PDFInfo
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- CN105307282B CN105307282B CN201510439354.0A CN201510439354A CN105307282B CN 105307282 B CN105307282 B CN 105307282B CN 201510439354 A CN201510439354 A CN 201510439354A CN 105307282 B CN105307282 B CN 105307282B
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- user terminal
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- time slot
- frame
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
- H04W74/0816—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision avoidance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
- H04W74/0875—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access with assigned priorities based access
Abstract
The invention discloses a kind of method and device preventing multiple users access interference, said method comprising the steps of: work in the distinctive user identifier ID of user terminal distribution of time division mode for each in advance；When multiple user terminals working in time division mode are simultaneously activated and carry out network insertion, each described user terminal is according to the user identifier ID being distributed, determine the time slot of its access network, so that the multiple user terminals activating line up the access queue of access network simultaneously；The time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network concurrent and send Frame.The present invention, when multiple users is simultaneously activated and needs to carry out network insertion, can be greatly reduced access interference, improves channel utilization rate.
Description
Technical field
The present invention relates to micropower Internet of Things field, particularly to a kind of method preventing multiple users access interference and
Device.
Background technology
Modern World is a high-speed automated world, and various equipment are in addition to can be with computer interconnection, all right
Interconnection, and simplest automation on-line mode uses serial communication exactly.Nowadays, compared with cable technology, wireless technology has
Have low cost, easy to carry, without the advantage such as wiring, be widely used in various equipment and system, such as handheld device, battery supply
Electricity equipment, industrial data acquisition system, wireless remote-control system, intelligent residential district no-stop charging system etc..Wireless communication protocol
Quality is directly connected to the speed that the security of system, the bit error rate and system are run, therefore, in various wireless system applications
In, wireless communication protocol seems and is even more important.
Occur the earliest for processing the ALOHA agreement that the agreement of point to multi--point data communication is the U.S., and land
Continue and occur in that frequency division multiple access (Frequency Division Multiple Access, FDMA), time division multiple acess (Time
Division Multiple Access, TDMA), CDMA (Code Division Multiple Access, CDMA) and
The communication mode of the multiple technologies such as space division multiple access (Space Division Multiple Access, SDMA).Multiple users with
Certain mode that may lead to a conflict shares common channel, and produced result is to collide with each other, and the data communication bit error rate occurs
The problem that raising, channel utilization rate decline.The operation principle of pure ALOHA agreement and feature are as follows:
Operation principle: as long as website produces frame (i.e. needing the data sending), if being just immediately transmitted on channel in regulation
Response is received, then it represents that send successfully, otherwise retransmit in time；
Retransmission policy: website wait one section of random time, then retransmit, if again conflicting, then wait again one section random when
Between, until retransmitting successfully.
The operation principle of CDMA slotted ALOHA agreement and feature are as follows:
Operation principle: channel time is divided into discrete time slot, flute length is the transmission time needed for a frame, each station
Point can only just allow when time slot starts to send, and other processes are identical with pure ALOHA agreement.It is to say, by dividing the time
For discrete timeslice so that the pure ALOHA of continuous print reforms into discrete CDMA slotted ALOHA, and so, user can not be such as pure ALOHA
The same data that send at once of agreement, but wait until that next timeslice could start to send data, thus avoid user and send
The randomness of data, as shown in Table 1 and Table 2, the hazardous area of conflict is averagely reduced to the half of pure ALOHA, and channel utilization carries
The high twice to pure ALOHA agreement.
Table 1-ALOHA protocol violation probability tables
| RTU quantity | Collision probability | Communication efficiency is assessed |
| 1 | 0 | Normally |
| 3 | > 80% | Make mistakes |
| 5 | 100% | Unavailable |
| 10 | 100% | Unavailable |
| 30 | 100% | Unavailable |
Table 2-CDMA slotted ALOHA protocol violation probability tables
| RTU quantity | Collision probability | Communication efficiency is assessed |
| 1 | 0 | Normally |
| 3 | > 50% | Normally |
| 5 | 100% | Make mistakes |
| 10 | 100% | Unavailable |
| 30 | 100% | Unavailable |
The purpose working out agreement mainly reduces collision probability, improves communication efficiency.For having a central station and number
For measuring the system of less remote station, ALOHA agreement can solve collision problem completely effectively, but with remote station quantity
Increasing, system communication efficiency can decline to a great extent, and there will be obstruction when serious.For solving collision problem, CDMA slotted ALOHA protocol requirement
Multiple remote stations synchronize, it is stipulated that a remote station is during a time slot carries out data frame transfer, and other remote stations can not be carried out
Communication, only just can carry out channel competition next time at the end of a time slot.CDMA slotted ALOHA agreement makes the probability of conflict have relatively
Significantly decline, but for wireless identification tag identification system, owing to remote station quantity even goes up to the tensth, hundreds of greatly
Thousand, trigger condition identical (i.e. simultaneously having data to need communication), need process in finite time (in for example several seconds) all
Label data, knowable to Tables 1 and 2, pure ALOHA agreement and CDMA slotted ALOHA agreement can not effectively reduce larger amt far-end
Stand and almost send data and the collision problem that produces simultaneously.
Content of the invention
It is an object of the invention to provide a kind of method and device preventing multiple users access interference, can preferably solve
The problem that certainly multiple users reduces access interference when being activated simultaneously.
According to an aspect of the invention, it is provided a kind of method preventing multiple users access interference, comprising:
Work in the distinctive user identifier ID of user terminal distribution of time division mode for each in advance；
When multiple user terminals working in time division mode are simultaneously activated and carry out network insertion, each described user
Terminal, according to the user identifier ID being distributed, determines the time slot of its access network, so that the multiple user activating is eventually simultaneously
End lines up the access queue of access network；
The time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network concurrent and send data
Frame.
Preferably, the distinctive user identifier of user terminal distribution of time division mode is worked in for each in advance described
After ID, the user identifier ID of each user terminal is carried out packet transaction, in order to make multiple user terminals of activation by group
Line up the access queue of access network.
Preferably, the time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network concurrent
The step sending Frame includes:
Each user terminal in described access queue, when the time slot of its access network determining reaches, is intercepted presetting
In time, data transmission channel is intercepted；
If not listening to preceding user terminal in described default time of intercept to take described data transmission channel and carry out
Data frame transfer, then access network send Frame；
If listening to preceding user terminal in described default time of intercept to take described data transmission channel and enter line number
According to frame transmission, then stop access network, and redefine the time slot of its access network.
Preferably, the time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network simultaneously
After sending Frame, also include:
The responses from network to be received such as the user terminal having sent Frame；
If the user terminal having sent Frame receives the response of automatic network, then described user terminal enters inactivation shape
State；
If the user terminal having sent Frame does not receives the response of automatic network, then described user terminal passes through again true
The time slot of its access network fixed, access network simultaneously sends Frame again.
Preferably, described user terminal generates random number, and according to described random number, redefine its access network when
Gap.
According to a further aspect in the invention, a kind of device preventing multiple users access interference is provided, comprising:
ID arranges module, for working in the distinctive user identifier of user terminal distribution of time division mode for each in advance
ID；
Time slot determining module, connects for being simultaneously activated at multiple user terminals working in time division mode and carrying out network
Fashionable, according to the user identifier ID distributing to each described user terminal, determine each described accessing user terminal to network
Time slot, so that the multiple user terminals activating line up the access queue of access network simultaneously；
Network access module, the access network of each user terminal being used in described access queue determined by basis
Time slot, is sequentially ingressed into network concurrent and send Frame.
Preferably, described ID arranges module and is additionally operable to work in the user terminal of time division mode for each in advance described
After distributing distinctive user identifier ID, the user identifier ID of each user terminal is carried out packet transaction, in order to make to swash
The multiple user terminals lived are lined up the access queue of access network by group.
Preferably, described network access module determined by access each accessing user terminal to network in queue when
When gap reaches, in default time of intercept, data transmission channel is intercepted, if not intercepting in described default time of intercept
Take described data transmission channel to preceding user terminal, then access network send Frame, otherwise stop access network,
And the time slot of described accessing user terminal to network is again determined by described time slot determining module.
Preferably, after described network access module is additionally operable in access network and sends Frame, wait to be received from
The response of network, if receiving the response of automatic network, then carries out inactivation process to described user terminal so that it is enter inactivation shape
State, otherwise, redefines the time slot of the access network of described user terminal so that it is access network send Frame again.
Preferably, described time slot determining module is additionally operable to generate random number, and according to described random number, redefines user
The time slot of accessing terminal to network.
Compared with prior art, the beneficial effects of the present invention is:
The present invention, when multiple users is simultaneously activated and needs to carry out network insertion, can be greatly reduced access punching
Prominent, improve channel utilization rate.
Brief description
Fig. 1 is the first pass figure preventing multiple users access interference that the embodiment of the present invention provides；
Fig. 2 is the second flow chart preventing multiple users access interference that the embodiment of the present invention provides；
Fig. 3 is the device block diagram preventing multiple users access interference that the embodiment of the present invention provides；
Fig. 4 is the system block diagram preventing multiple users access interference that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below is excellent
Select embodiment to be merely to illustrate and explain the present invention, being not intended to limit the present invention.
Fig. 1 is the method flow diagram preventing multiple users access interference that the embodiment of the present invention provides, as it is shown in figure 1,
Step includes:
Step S101: work in the distinctive user identifier ID of user terminal distribution of time division mode for each in advance.
Further, when the quantity of user terminal is bigger, the user identifier ID of each user terminal can be carried out
Packet transaction, in order to make multiple user terminals of activation line up the access queue of access network by group.For example user terminal is divided
Being two groups, the first component group radix is 0xxH, and second component group radix is 0yyH, general 0yyH little magnitude than 0xxH.
Step S102: when multiple user terminals working in time division mode are simultaneously activated and carry out network insertion, often
Individual described user terminal, according to the user identifier ID being distributed, determines the time slot of its access network, so that activate simultaneously
Multiple user terminals line up the access queue of access network.
The transmission cycle assuming Frame is T, and user terminal quantity is 0zzH.
If being grouped, then the time slot of accessing user terminal to network is id*0zzH*T；
If being grouped, then for the user terminal of first group, the time slot of its access network is id*0xxH*T, for
The user terminal of second group, the time slot of its access network is 0xxH*T+id*0yyH*T.
Step S103: the time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network simultaneously
Send Frame.
Further, when user terminal cannot be carried out the whole network synchronization, in order to avoid conflict, user terminal can send
Before Frame, data transmission channel is intercepted.Specifically, each user terminal in described access queue determines at it
Access network time slot reach when, in default time of intercept, data transmission channel is intercepted by (such as 2ms), if in institute
Do not listen to preceding user terminal in stating default time of intercept to take described data transmission channel and carry out data frame transfer, then connect
Enter network concurrent and send Frame, otherwise stop access network, and redefine the time slot of its access network.
For needing to redefine the user terminal of the time slot of access network, can be redefined by following two mode
The time slot of access network:
1st, user terminal according to user identifier ID, packet radix, send cycle T, redefine its access network when
Gap.
2nd, user terminal generates a random number, and according to the random number being generated, redefine its access network when
Gap.Wherein, the size of described random number is more than the quantity of user terminal.
Fig. 2 is the second flow chart preventing multiple users access interference that the embodiment of the present invention provides, as in figure 2 it is shown,
Step includes:
Step 201: work in the distinctive user identifier ID of user terminal distribution of time division mode for each in advance.
Further, when the quantity of user terminal is bigger, the user identifier ID of each user terminal can be carried out
Packet transaction, in order to make multiple user terminals of activation line up the access queue of access network by group.For example, it is assumed that there is 50H
Individual user terminal, can be first group and second group by the user identifier ID packet transaction of described 50H user terminal, its
In, the first component group radix is 40H, preceding for user identifier ID 64 user terminals can be assigned as first group, and the
Two packet radixes are 20H, posterior for user identifier ID 16 user terminals can be assigned as second group.
Step S202: when multiple user terminals working in time division mode are simultaneously activated and carry out network insertion, often
Individual described user terminal, according to the user identifier ID being distributed, determines the time slot of its access network, so that activate simultaneously
Multiple user terminals line up the access queue of access network.
The transmission cycle assuming Frame is T, and user terminal quantity is 50H.
If being grouped, then the time slot of accessing user terminal to network is id*50H*T；
If being grouped, then for first group that packet radix is 40H, the time slot of the access network of user terminal is
Id*40H*T, for second group that packet radix is 20H, the time slot of the access network of user terminal is 40H*T+id*20H*T.
Step S103: the time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network simultaneously
Send Frame.
Step S104: the response from network to be received such as user terminal having sent Frame.
Step S105: if the user terminal having sent Frame receives the response of automatic network, then described user terminal enters
Entering inactivated state, otherwise described user terminal is by redefining the time slot of its access network, and access network simultaneously sends number again
According to frame.
Similarly, for needing to redefine the user terminal of the time slot of access network, can be by following two mode
Redefine the time slot of access network:
1st, user terminal according to user identifier ID, packet radix, send cycle T, redefine its access network when
Gap.
2nd, user terminal generates a random number, and according to the random number being generated, redefine its access network when
Gap.Wherein, the size of described random number is more than the quantity of user terminal.
Fig. 3 is the system block diagram preventing multiple users access interference that the embodiment of the present invention provides, as it is shown on figure 3, bag
Include ID and module the 10th, time slot determining module 20 and network access module 30 are set.
ID arranges module 10 for working in the distinctive ID of user terminal distribution of time division mode for each in advance
Symbol ID.When user terminal quantity is bigger, the user identifier ID of each user terminal can be carried out packet transaction, for example, divide
It is two groups, now, a packet radix magnitude less than first group of general second group.
Time slot determining module 20 is for being simultaneously activated at multiple user terminals working in time division mode and carrying out network
During access, according to the user identifier ID distributing to each described user terminal, determine each described accessing user terminal to network
Time slot so that the multiple user terminals activating line up the access queue of access network simultaneously.According to ID, module 10 is set
Packet situation, time slot determining module 20 carries out the time slot distribution of different modes, for example, when user terminal quantity is 0xxH, if
ID arranges module 10 and is not grouped, then time slot determining module 20 determines that the time slot of the access network of each user terminal is id*
0zzH*T, wherein T is the transmission cycle of Frame；If it is the of 0xxH that user terminal arrange module 10 to be divided into packet radix by ID
One group and packet radix are second group of 0yyH, then for the user terminal of first group, the time slot of access network is id*0xxH*
T, for the user terminal of second group, the time slot of access network is 0xxH*T+id*0yyH*T.
Network access module 30 is for the access network of each user terminal in access queue described determined by basis
Time slot, be sequentially ingressed into network concurrent and send Frame, and in access network and after sending Frame, wait to be received from network
Response, if receiving the response of automatic network, then inactivation process is carried out to described user terminal so that it is enter inactivated state, no
Then, the time slot of the access network of described user terminal is redefined so that it is access network send Frame again.
It should be noted that for avoiding at front user terminal data transmission delay and taking time slot at rear user terminal,
Lead to a conflict.Described network access module determined by access the time slot of each accessing user terminal to network in queue and reach
When, in default time of intercept, data transmission channel is intercepted, if not listening to front in described default time of intercept
User terminal take described data transmission channel, then access network send Frame, otherwise stop access network, and again
Determine the time slot of described accessing user terminal to network by described time slot determining module.
The mode of the above-mentioned time slot redefining accessing user terminal to network includes but is not limited to following two:
1st, time slot determining module 20 is according to user identifier ID, packet radix, transmission cycle T, redefines its access network
The time slot of network；
2nd, time slot determining module 20 generates random number, and according to described random number, redefines accessing user terminal to network
Time slot, wherein, the size of random number be more than user terminal quantity.
Fig. 4 is the system block diagram preventing multiple users access interference that the embodiment of the present invention provides, at wireless identification tag body
Part identify in (such as personnel) application system, when being activated in the same time more than 10 RTU, and need to complete at short notice body
Giving the correct time on Fen, owing to access interference is significantly increased, channel utilization lowers, and corrupted data or loss situation are serious, it is impossible to meet
The similar to Figure 4 application system having time requirement, i.e. utilizes existing communications protocol cannot identify Fig. 4 system at short notice
A large amount of mobile personnels in system.And the present embodiment can solve the problem that multiple spot (being more than 10 RTU) to a bit (MTU) data communication conflict
Problem, it is adaptable to have time requirement and be concurrently accessed the big application system of the RTU quantity of network, not resulting in loss of data.
As shown in Figure 4, n user carries a user terminal i.e. remote station with specific user identifier respectively
(Remote Terminal Unit, RTU), and pass through gate inhibition, RTU1, RTU2 ... RTUn after by gate control system, access network
Network simultaneously sends Frame to central station (Master Terminal Unit, MTU).
Gate control system includes:
Code sender, is used for generating A code signal and B code signal；
Antenna A, is arranged on inside doorframe, is used for launching A code signal；
Antenna B, is arranged on outside doorframe, is used for launching B code signal.
Wherein, code sender circulation generates A code signal and B code signal, and passes through antenna A and antenna B successively in a time division manner
Launching A code signal and B code signal, for example, the T1 moment launches A code signal, and the T1+a moment launches B code signal, and the T1+2a moment launches
A code signal, the T1+3a moment launches B code signal, by that analogy.A > 0, concrete value can be configured as required, for example may be used
To be set to 1ms, 2ms etc..
Specific works flow process is as follows:
Step 1: work in user terminal RTU1, the RTU2 of time division mode for each ... RTUn distribution distinctive user mark
Know symbol ID.
Can adjust packet parameters according to the demand of actual RTU quantity, when RTU quantity is bigger, packet radix is also adjusted accordingly
2/3rds of whole about RTU quantity, if not high by time requirement, can be being grouped the some larger of numerical value adjustment, specifically
Being actually needed of viewing system and determine.
Step 2: work as RTU1, RTU2 ... RTUn close to gate control system and enter gate control system magnetic induction district when, RTU1,
RTU2 ... RTUn is simultaneously activated.
Step 3: for some user terminal RTU, when user carries RTU from inside to outside by gate inhibition, RTU connects successively
Receive the A code signal of described antenna A transmitting and the B code signal of described antenna B transmitting, and to the A code signal being received and B code signal
Arrange according to the reception time after being decoded, formed and judged code sequence by A code and B code are formed first, and utilize described
First judges code sequence, determine carry described user terminal user enter outgoing direction for direction of going out；And when user carries RTU
When ecto-entad is by gate inhibition, RTU receives the B code signal of described antenna B transmitting and the A code signal of described antenna A transmitting successively,
And arrange according to the reception time after the B code signal being received and A code signal are decoded, formed and formed by B code and A code
Second judge code sequence, and utilize described second to judge code sequence, determine the turnover side of the user carrying described user terminal
To for direction of entering.
Step 4:RTU1, RTU2 ... RTUn, according to the user identifier ID being distributed, determines the time slot of its access network,
So that the multiple user terminals activating line up the access queue of access network simultaneously.
Step 5: access RTU1, the RTU2 in queue ... the time slot that RTUn determines according to it, data transmission channel is carried out
Intercepting, if not having data frame transfer in described data transmission channel, then access network transmission is included into outgoing direction information and use
The Frame of family identifier ID.
Step 6: sent RTU1, the RTU2 of Frame ... RTUn is to be received from network within the default stand-by period etc.
Response.
Step 7: if the RTU having sent Frame receives the response of automatic network within the default stand-by period, then this RTU enters
Enter inactivated state, otherwise, by redefining the time slot of its access network, described in access network again transmission, comprise turnover side
Frame to information and user identifier ID.
After using the technical scheme that the present invention provides, collision probability table is as shown in table 3, (is included by adjusting packet parameters
Number of packet and packet radix) RTU quantity is when being 50, collision probability declines on the contrary.
The collision probability table of the table 3-present invention
| RTU quantity | Collision probability | Communication efficiency is assessed |
| 1 | 0 | Normally |
| 3 | < 5% | Normally |
| 5 | < 10% | Normally |
| 10 | < 15% | Normally |
| 20 | < 20% | Normally |
| 30 | < 25% | Normally |
| 50 | < 15% | Normally |
In sum, the present invention has following technical effect that
By the technical scheme using the present invention to provide, can effectively reduce when multiple users is concurrently accessed network and produce
The probability of conflict, substantially increases channel utilization, improves communication efficiency.
Although being described in detail the present invention above, but the invention is not restricted to this, those skilled in the art of the present technique
Various modification can be carried out according to the principle of the present invention.Therefore, all modifications made according to the principle of the invention, all should be understood to
Fall into protection scope of the present invention.
Claims (10)
1. the method preventing multiple users access interference, it is characterised in that include:
Work in the distinctive user identifier ID of user terminal distribution of time division mode for each in advance；
The user identifier ID of each user terminal is carried out packet transaction；
When multiple user terminals working in time division mode are simultaneously activated and carry out network insertion, according to group result, make
The multiple user terminals activating are lined up the access queue of access network by group；
In described access queue, each user terminal is according to the user identifier ID being distributed, packet radix and number to be sent
According to the transmission cycle of frame, determine the time slot of its access network；
The time slot that each user terminal in described access queue determines according to it, is sequentially ingressed into network concurrent and send Frame.
2. method according to claim 1, it is characterised in that the user terminal accessing each group in queue determines in its group
The time slot of middle access network is the transmission cycle of ID value * packet radix * Frame.
3. method according to claim 1, it is characterised in that each user terminal in described access queue is true according to it
Fixed time slot, is sequentially ingressed into network concurrent and send the step of Frame to include:
Each user terminal in described access queue is when the time slot of its access network determining reaches, at default time of intercept
In data transmission channel is intercepted；
If not listening to preceding user terminal in described default time of intercept to take described data transmission channel and carry out data
Frame transmits, then access network send Frame；
If listening to preceding user terminal in described default time of intercept to take described data transmission channel and carry out Frame
Transmission, then stop access network, and redefine the time slot of its access network.
4. the method according to claim 1-3 any one, it is characterised in that each user in described access queue
The time slot that terminal determines according to it, is sequentially ingressed into after network concurrent send Frame, also includes:
The responses from network to be received such as the user terminal having sent Frame；
If the user terminal having sent Frame receives the response of automatic network, then described user terminal enters inactivated state；
If the user terminal having sent Frame does not receives the response of automatic network, then described user terminal is by redefining it
The time slot of access network, access network simultaneously sends Frame again.
5. method according to claim 4, it is characterised in that described user terminal generate random number, and according to described with
Machine number, redefines the time slot of its access network.
6. the device preventing multiple users access interference, it is characterised in that include:
ID arranges module, for working in the distinctive user identifier ID of user terminal distribution of time division mode for each in advance,
And the user identifier ID of each user terminal is carried out packet transaction；
Time slot determining module, for being simultaneously activated at multiple user terminals working in time division mode and carrying out network insertion
When, make multiple user terminals of activation line up the access queue of access network by group, and according to a described user in access queue
In the transmission cycle of the user identifier ID of terminal, packet radix and Frame to be sent, determine each described user terminal
The time slot of access network；
Network access module, for according to determined by described access queue in each user terminal access network when
Gap, is sequentially ingressed into network concurrent and send Frame.
7. device according to claim 6, it is characterised in that described time slot determining module determines each group in access queue
User terminal in its group the time slot of access network be, ID value * packet radix * Frame the transmission cycle.
8. device according to claim 6, it is characterised in that described network access module determined by access in queue
Each accessing user terminal to network time slot reach when, in default time of intercept, data transmission channel is intercepted, if
Do not listen to preceding user terminal in described default time of intercept and take described data transmission channel, then access network is concurrent
Send Frame, otherwise stop access network, and again described time slot determining module is determined described accessing user terminal to network
Time slot.
9. the device according to claim 6-8 any one, it is characterised in that described network access module is additionally operable to connecing
Entering after network concurrent send Frame, waiting the response from network to be received, if receiving the response of automatic network, then to described use
Family terminal carries out inactivation process so that it is enter inactivated state, otherwise, redefine described user terminal access network when
Gap so that it is access network send Frame again.
10. device according to claim 9, it is characterised in that described time slot determining module is additionally operable to generate random number, and
According to described random number, redefine the time slot of accessing user terminal to network.
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| CN106604409B (en) * | 2016-12-30 | 2020-02-21 | 成都怡康科技有限公司 | Wireless communication method applied to mobile group communication |
| CN107041010B (en) * | 2017-06-13 | 2020-11-17 | 海能达通信股份有限公司 | Method, base station and mobile terminal for realizing service access |
| CN109905197A (en) * | 2019-01-31 | 2019-06-18 | 江苏金智科技股份有限公司 | A kind of wireless anti-interference method and fault detector retransmitted based on random number |
| CN112788778B (en) * | 2019-11-01 | 2022-11-18 | 苏州千米电子科技有限公司 | Data sending method and device |
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| US7729321B2 (en) * | 2007-02-21 | 2010-06-01 | Itt Manufacturing Enterprises Inc. | Nearly collision-free channel access system and method |
| EP2400810B1 (en) * | 2010-06-23 | 2013-01-02 | ML-C MobileLocation-Company GmbH | Sending a message from a telecommunication device to a mobile telecommunication network |
| EP2695469B1 (en) * | 2011-04-02 | 2017-07-05 | Alcatel Lucent | Slotted access for wireless communication devices and control thereof |
| CN103228019B (en) * | 2012-08-28 | 2017-02-22 | 陈波 | Wireless channel access method applicable to railway operation scenes |
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