CN105992387A - Wireless channel access method and wireless channel access device - Google Patents
Wireless channel access method and wireless channel access device Download PDFInfo
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- CN105992387A CN105992387A CN201510077264.1A CN201510077264A CN105992387A CN 105992387 A CN105992387 A CN 105992387A CN 201510077264 A CN201510077264 A CN 201510077264A CN 105992387 A CN105992387 A CN 105992387A
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Abstract
The invention provides a wireless channel access method and a wireless channel access device. In each-stage access process, an AP sequentially selects user terminals to enter a next-stage access process according to a time slot for access request messages sent by the user terminals, and thus, the number of user terminals sending the access request in the next-stage access process is reduced; until an N-stage access process is reached, the AP sequentially notifies the user terminals to be accessed to the wireless channel again and sends data; after a certain-stage access process completes processing, the AP notifies the user terminals to return to the former-stage access process; and in such circulation, the access process at the time is finished until the first-stage access process completes processing. Thus, mutual interference between multiple user terminals can be effectively avoided, and sequential channel access by the multiple user terminals on the basis of low signaling overhead is supported.
Description
Technical field
The present invention relates to communication technical field, particularly to a kind of wireless channel cut-in method and device.
Background technology
Connect with the random wireless channel as representative for the carrier sense multiple access/conflict avoidance (CSMA/CA)
Enter technology and there is the characteristics such as simple, flexible, low cost, be widely used in WLAN (Wireless
Local Area Network, WLAN), wireless personal local area network (Wireless Personal Area
Network, WPAN) etc. in wireless communication system, it has also become the basis nothing of mobile Internet and Internet of Things
Line technology.
But, CSMA/CA technology is a kind of interference-limited multiple access technology.When access customer number is more,
When portfolio is bigger, use the wireless communication system of CSMA/CA technology cannot avoid different user
Send and interfere produced by signal.
With the fast development that mobile Internet and Internet of Things are applied, all kinds of wireless devices get more and more, close
Spend increasing, use the wireless system of CSMA/CA technology to face increasingly severe interference problem.
For example, WLAN devices mainly uses the shared band of 2.4-2.4835GHz to communicate, in a large number
Often resulting in whole wireless local area network (WLAN) system when user accesses to paralyse, this phenomenon especially often occurs in meeting
The hot spot regions that user is intensive, portfolio is bigger such as view room, railway station, airport.
In order to improve CSMA/CA interference problem, at present, many wireless devices have supported that request sends
The booking-mechanisms such as (Request To Send, RTS)/clear to send (Clear To Send, CTS) come
Reducing probability of interference, this type of mechanism first passes through shorter RTS and CTS message before transmitting data and is
Follow-up data sends one time period of reservation, and period, other equipment did not send data, thus avoided as far as possible
Interference between distinct device.But, this type of mechanism needs to first pass through CSMA/CA access transmission RTS and disappears
Breath, usually cannot start when access request is more, it is impossible to tackle the problem at its root.
Content of the invention
In view of this, the application provides a kind of wireless channel cut-in method and device, to solve multi-user eventually
Interference problem during end access wireless channel.
For solving above-mentioned technical problem, the technical scheme of the application is achieved in that
A kind of wireless channel cut-in method, is applied in wireless access point AP, and the method includes:
This AP is transmitted into n-th grade and accesses process message, and the user terminal making startup n-th grade access process exists
Time window is specified to select to send out the time slot sending access request message, if not examining before the time slot selecting reaches
Measure channel occupied, then send access request message at this time slot；
If this AP receives access request message at k-th time slot, then the finish time of k-th time slot is set
It is set to the point of interruption, and sends interrupt message notice user terminal, if n is less than N, then make to send at time slot k
The user terminal of access request message starts (n+1)th grade and accesses process；If n is equal to N, then make at time slot k
The user terminal sending access request message sends data；N is the access process progression of configuration, and n is 1 to N
Integer；
This AP is receiving the data that user terminal sends, or Preset Time is then, sends and returns message；If
K is less than K, then make user terminal be returned for the point of interruption of k-th time slot setting, for+1 time slot of kth
Carry out channel access；If k is equal to K, then user terminal is made to return last interruption that n-1 level accesses process
Point；K is the number of time slots of a time window, and k is the integer of 1 to K；
This AP is if it is determined that active user's terminal returns the 1st grade of point of interruption accessing process, and this point of interruption is pin
The point of interruption arranging last time slot of currently assigned time window, then terminate current radio channel and access
Process.
A kind of wireless channel access device, is applied in wireless access point AP, and this device includes: receiving unit,
Transmitting element and processing unit；
Described receiving unit, is used for receiving access request message；Receive the data that user terminal sends；
Described transmitting element, is used for being transmitted into n-th grade and accesses process message, make n-th grade of access process of startup
User terminal at the appointed time window selection send out the time slot sending access request message, if select time slot
It is not detected by channel before arrival occupied, send access request message at this time slot；When described processing unit
When the finish time of k-th time slot is set to the point of interruption, send interrupt message notice user terminal, if n
Less than N, then the user terminal sending access request message at time slot k is made to start (n+1)th grade of access process；
If n is equal to N, then the user terminal sending access request message at time slot k is made to send data；N is configuration
Access process progression, n is 1 to the integer of N；When described receiving unit receives what user terminal sent
Data, or Preset Time is then, sends and returns message；If k is less than K, then user terminal is made to be returned for
The point of interruption of k-th time slot setting, carries out channel access for+1 time slot of kth；If k is equal to K, then
User terminal is made to return last point of interruption that n-1 level accesses process；K is the time slot of a time window
Number, k is the integer of 1 to K；
Described processing unit, if for receiving access request as this AP of described receiving unit at k-th time slot
During message, then the finish time of k-th time slot is set to the point of interruption；If it is determined that active user's terminal returns
The 1st grade of point of interruption accessing process, and this point of interruption is for during for last of currently assigned time window
The point of interruption that gap is arranged, then terminate current radio channel access procedure.
From technical scheme above, in the application, in every one-level access process, AP is whole according to user
The time slot that end sends access request message selects user terminal to enter to next stage access process successively, with
Reduce and next stage access process sends the user terminal number that request accesses；Until reach N level access into
Journey, AP notifies user terminal access wireless channel more successively and sends data；When certain one-level accesses process
After process completes, AP then notifies that user terminal is back to upper level and accesses process；So move in circles,
Until the 1st grade of access process is disposed, then this access procedure terminates, and can be prevented effectively from multi-user
Interfering between terminal, and on the basis of signaling consumption is low, support the orderly access of multiple users
Channel.
Brief description
Fig. 1 is wireless channel access process schematic diagram in the embodiment of the present application；
Fig. 2 is that in the embodiment of the present application, wireless channel accesses schematic diagram；
Fig. 3 is the apparatus structure schematic diagram being applied to above-mentioned technology in the embodiment of the present application.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawings simultaneously
For embodiment, technical scheme is described in detail.
The embodiment of the present application provides a kind of wireless channel cut-in method, is applied on WAP (AP).
The access procedure of wireless channel has been resolved into N number of access process nested step by step by AP.Every one-level access into
The time slot that in journey, AP sends access request message according to user terminal selects user terminal to enter to down successively
One-level accesses process, sends, to reduce, the user terminal number that request accesses in next stage access process；Until arriving
Reaching N level and accessing process, AP notifies user terminal access wireless channel more successively and sends data；When a certain
Level access process is processed after completing, and AP then notifies that user terminal is back to upper level and accesses process；So follow
Ring is reciprocal, until the 1st grade of access process is disposed, then this access procedure terminates, and can be prevented effectively from
Interfering between multiple users, and on the basis of signaling consumption is low, support the orderly of multiple users
Access channel.
The progression of the access channel that the N in the embodiment of the present application is configuration；Can be according to access user terminal
Quantity, access frequency, data and send successfully, and unsuccessfully etc. situation configuration and dynamically adjustment N value with respectively
Access process sends the size of the time window of access request message, with the actual demand of satisfied different scenes.
Seeing Fig. 1, Fig. 1 is wireless channel access process schematic diagram in the embodiment of the present application.Concretely comprise the following steps:
Step 101, AP is transmitted into n-th grade and accesses process message, makes startup n-th grade access the use of process
Terminal at the appointed time window selection in family sends out the time slot sending access request message, if reaching at the time slot selecting
It is not detected by channel occupied before, then send access request message at this time slot.
In this step, when n is equal to 1, described n-th grade is accessed process message for accessing notification message；Work as n
When being not equal to 1, described n-th grade of access process message is interrupt message.N is the integer of 1 to N.
If n=1, then AP sends and accesses notification message.
When each user terminal receives this access notification message, at the appointed time one time slot of window selection, work done in the manner of a certain author
Send the time slot of access request message for this user terminal, be restricted in selection rule the embodiment of the present application,
As a time slot can be randomly choosed；If before the time slot arrival selected by it of any user terminal, being not detected by
The access request message that other user terminals send, then this user terminal sends access request at the time slot selecting
Message.
If n is not equal to 1, be i.e. more than 1, then AP sends interrupt message.
Start n level and access the user terminal of process, at the appointed time one time slot of window selection.
I.e. when n is equal to 1, start the user terminal of access process by being there is a need to access the user terminal of channel；
And n is when being not equal to 1, only in (n-1)th grade of access process Current interrupt time slot in send access request and disappear
The user terminal of breath starts n-th grade and accesses process.
Step 102, if this AP receives access request message at k-th time slot, then by k-th time slot
Finish time is set to the point of interruption, and sends interrupt message notice user terminal, if n is less than N, then makes
The user terminal that time slot k sends access request message starts (n+1)th grade of access process；If n is equal to N, then
The user terminal sending access request message at time slot k is made to send data.
It is not precluded within all non-selected k-th time slot of all user terminals in currently assigned time window, then
K time slot A P would not receive the access request message that user terminal sends, then enter+1 time slot of kth
Wireless channel access.
When k-th time slot receives access request message, then the finish time of k-th time slot is set to interrupt
Point, and send interrupt message notice user terminal.
When the user terminal that time slot k sends access request message receives this interrupt message, determine whether
Be in afterbody and access process, i.e. determine that whether n is equal to N, if be currently in afterbody access into
Journey, then this user terminal access wireless channel sends data；Otherwise, access request message is sent at time slot k
User terminal start (n+1)th grade access process.
AP, when the data that the user terminal receiving sends, sends to user terminal and returns message, according to reality
Border is applied, and this return message also can be ACK message.If AP at Preset Time then, does not receives and takes office
During the data what user terminal sends, send one to user terminal and return message, so that sending at k time slot
The user terminal of access request returns the point of interruption.
Step 103, this AP is receiving the data that user terminal sends, or Preset Time is then, and transmission is returned
Return message；If k is less than K, then user terminal is made to be returned for the point of interruption of k-th time slot setting, for
+ 1 time slot of kth carries out channel access；If k is equal to K, then makes user terminal return n-1 level and access process
Last point of interruption.
In the embodiment of the present application, K is the number of time slots of a time window, and k is the integer of 1 to K；For
The time window of access processes at different levels, number of time slots can be the same or different.
When user terminal receives return message, however, it is determined that k is not K, it is determined that should return current process
Last point of interruption, enters+1 time slot of kth and proceeds channel access；If it is determined that k is equal to K, then
Determine and return last point of interruption that upper level accesses process.
Step 104, this AP is if it is determined that active user's terminal returns the 1st grade of point of interruption accessing process, and is somebody's turn to do
The point of interruption for for currently assigned time window last time slot arrange the point of interruption, then terminate currently without
Line channel access process.
This AP is if it is determined that active user's terminal returns the 1st grade of point of interruption accessing process, and this point of interruption is not
Last time slot of currently assigned time window, then the wireless channel entering next time slot accesses, if
Until the 1st grade of last time slot accessing process terminates, the access not receiving user terminal transmission again please
Seek message, then terminate current radio channel access procedure.
This AP sends access notification message again, enters next wireless channel access procedure, or terminates to be had or not
Line channel access process.
AP, in any level access process, if this AP needs to send data, then sends message informing user eventually
End interrupts current radio channel and accesses, and sends data；AP, after sending ED, sends out to user terminal
Send return message, make user terminal return the access that the point of interruption proceeds wireless channel.
In the specific embodiment of the application, access request message, synchronizing sequence can be used.Synchronizing sequence is generally very
Short, very low signaling consumption can be realized.For wlan system, synchronizing sequence is short training sequence (STF).
This sequence is very short, simply the very small part of WLAN physical layer frame head, is significantly shorter than RTS/CTS frame length,
And the access request message of different user is overlapped mutually rear AP also can identify.It should be noted that different use
There are a little difference, the ratio that therefore can arrange slot length the time that the access request message that family sends reaches AP
Access request message is slightly longer, thus ensure AP completely receive in a time slot user send access please
Seek message.
Interrupt message, the synchronizing sequence that can be repeated by two continuous slots to send and phase place is identical is constituted.If user
Continuously receive two or more synchronizing sequence and just can interpolate that it is to have received interrupt message, and finally to receive
Differentiate from which time slot to start to interrupt on the basis of synchronizing sequence；Owing to certain customers may be in AP sends
Access request message is sent, if after therefore certain user has just sent access request message, at once while disconnected message
Receive and only receive a synchronizing sequence, then can judge from which time slot starts on the basis of this synchronizing sequence
Disconnected.In wlan system, it is possible to use two continuous slots repeat the STF realization sending and phase place is identical.
Return message, in order to distinguish with interrupt message, can be repeated to send and opposite in phase by two continuous slots
Synchronizing sequence constitute.In wlan system, return message and two continuous slots can be used to repeat to send
And the STF of opposite in phase constitutes realization.
When certainly implementing, it is possible to based on the other kinds of interrupt message of synchronizing sequence design and return message.
Owing to above-mentioned message is all based on synchronizing sequence, therefore existing equipment do not need modification physical layer just permissible
Support.
Below in conjunction with the accompanying drawings, describe in the application specific embodiment how to realize that wireless channel accessed in detail
Journey.
The wireless channel access mechanism that the application provides can support the user of various scale flexibly effectively
Access.If making the time window sending access request in access process at different levels be 10, then often increase one-level
Access process, the number of users supported can approximate lifting an order of magnitude.For most actual application
Scene, the access customer number that single AP supports is usually no more than 10,000, and the present invention has had only to 5～6 grades
Access process just can be supported very well.If continuing to increase access process progression, the application is permissible in theory
Support that infinite number of user accesses.The less application scenarios for number of users, can be by reducing access process
Progression reduces unnecessary signaling consumption, such as: use 2～3 grades of access processes to support well
Tens access user to hundreds of.
Seeing Fig. 2, Fig. 2 is that in the embodiment of the present application, wireless channel accesses schematic diagram.In Fig. 2, to join
Put 2 grades of access processes, as a example by every grade of access process includes 3 time slots.During Fig. 2 bend dash area
Gap mark AP receives access request message, and empty timeslots portion identification AP does not receives access request
Message.
In Fig. 2, AP, when unlatching is currently accessed process, sends and accesses notification message, first carry out the 1st
Level accesses process.
Each AP receives this access notification message, at the appointed time randomly chooses a time slot in window and intends
Send access request message, it is assumed that the 1st time slot of some user terminal selecting and the 3rd time slot, if
The time slot selecting then and before to be not detected by channel occupied, then send at the time slot selecting that access please
Seek message.
Send out from Figure 2 it can be seen that AP have received user terminal at the 1st grade of the 1st time slot accessing process
The access request message sent, at the end of the 1st time slot, arranging this moment is the 1st point of interruption, and
Send interrupt message.
Start the 2nd grade of user terminal accessing process when receiving interrupt message, access process at the 2nd grade
Specify in time window and randomly choose a time slot and send out and send access request message, it is assumed that be currently up the
2 grades of user terminal A accessing process select the 2nd time slot to send out and send access request message, and when this
Gap then, sends access request message.
AP does not receives, at the 2nd grade of the 1st time slot accessing process, the access request that user terminal sends
Message, then be directly entered the channel access of the 2nd time slot.
AP receives, at the 2nd grade of the 2nd time slot accessing process, the access request that user terminal starts and disappears
Breath, at the end of this time slot, is set to the point of interruption, i.e. the 2nd grade the 1st point of interruption accessing process；
And send interrupt message.
When the user terminal A that this time slot sends access request message receives interrupt message, determine current
The access process being entered is that afterbody accesses process, and i.e. the 2nd grade is accessed process, then access wireless communication
Road sends data.
AP is receiving the data that user terminal sends, or Preset Time is then, sends and returns message,
The user terminal making startup the 2nd grade access process returns the 2nd grade of last point of interruption accessing process,
From Figure 2 it can be seen that be current 2nd grade the 1st point of interruption accessing process.
AP determines last time slot that the corresponding time slot of this point of interruption is not in the 2nd grade of access process,
Then enter the channel access of next time slot, the i.e. channel access of the 3rd time slot.
AP does not receives the access request message that user terminal sends, and the 3rd at the end of the 3rd time slot
Individual time slot is last time slot of current 2nd grade access process, then send and return message, makes user eventually
End returns the 1st grade of the 1st point of interruption accessing process, last i.e. current point of interruption.
AP enters next time slot, the channel access of i.e. the 1st grade the 2nd time slot accessing process.By
Fig. 2 is visible, does not receives the access request message that user terminal sends, then before the 2nd time slot terminates
Enter the 1st grade of channel access accessing the 3rd time slot of process.
As shown in Figure 2, AP have received user terminal send out at the 1st grade of the 3rd time slot accessing process
The access request message sent, at the end of the 3rd time slot, arranging this moment is the 2nd point of interruption, and
Send interrupt message.
Start the 2nd grade of user terminal accessing process when receiving interrupt message, in current 2nd grade of access
Process is specified in time window and is randomly choosed a time slot and send out and send access request message, it is assumed that currently open
The dynamic 2nd grade of user terminal B accessing process selects the 1st time slot to send out and send access request message, and
This time slot then, sends access request message.
AP receives, at current 2nd grade of the 1st time slot accessing process, the access that user terminal starts please
Seek message, at the end of this time slot, be set to the point of interruption, i.e. the 2nd grade the 1st interruption accessing process
Point；And send interrupt message.
When the user terminal B that this time slot sends access request message receives interrupt message, determine current
The access process being entered is that afterbody accesses process, and i.e. the 2nd grade is accessed process, then access wireless communication
Road sends data.
AP is receiving the data that user terminal sends, or Preset Time is then, sends and returns message,
The user terminal making startup the 2nd grade access process returns the 2nd grade of last current interruption of access process
Point, from Figure 2 it can be seen that be current 2nd grade the 1st point of interruption accessing process.
AP determines last time slot that the corresponding time slot of this point of interruption is not in the 2nd grade of access process,
Then enter the channel access of next time slot, the i.e. channel access of the 2nd time slot.
AP does not receives the access request message that user terminal sends, and the 2nd at the end of the 2nd time slot
Individual time slot for current 2nd grade last time slot accessing process, then enters next time slot, and i.e. the
The channel access of 3 time slots.
AP does not receives the access request message that user terminal sends, and the 3rd at the end of the 3rd time slot
Individual time slot is last time slot of current 2nd grade access process, then send and return message, makes user eventually
End returns the 1st grade of the 2nd point of interruption accessing process, last i.e. current point of interruption.
AP determines last time slot that the 2nd the corresponding time slot of the point of interruption is the 1st grade of access process,
Then access this secondary channel to access；Access notification message carry out connecing of channel next time if it is desirable, send
Enter.
Based on same inventive concept, the application also proposes a kind of wireless channel access device, is applied to wireless
In access point AP.Seeing Fig. 3, Fig. 3 is the device knot being applied to above-mentioned technology in the embodiment of the present application
Structure schematic diagram.This device includes: receiving unit the 301st, transmitting element 302 and processing unit 303；
Receiving unit 301, is used for receiving access request message；Receive the data that user terminal sends；
Transmitting element 302, is used for being transmitted into n-th grade and accesses process message, make n-th grade of access process of startup
User terminal at the appointed time window selection send out the time slot sending access request message, if select time slot
It is not detected by channel before arrival occupied, then send access request message at this time slot；When processing unit 303
When the finish time of k-th time slot is set to the point of interruption, send interrupt message notice user terminal, if n
Less than N, then the user terminal sending access request message at time slot k is made to start (n+1)th grade of access process；
If n is equal to N, then the user terminal sending access request message at time slot k is made to send data；N is configuration
Access process progression, n is 1 to the integer of N；When receiving unit 301 receives what user terminal sent
Data, or Preset Time is then, sends and returns message；If k is less than K, then user terminal is made to be returned for
The point of interruption of k-th time slot setting, carries out channel access for+1 time slot of kth；If k is equal to K, then
User terminal is made to return last point of interruption that n-1 level accesses process；K is the time slot of a time window
Number, k is the integer of 1 to K；
Processing unit 303, if for receiving access request as this AP of receiving unit 301 at k-th time slot
During message, then the finish time of k-th time slot is set to the point of interruption；If it is determined that active user's terminal returns
The 1st grade of point of interruption accessing process, and this point of interruption is for during for last of currently assigned time window
The point of interruption that gap is arranged, then terminate current radio channel access procedure.
It is preferred that
Processing unit 303, if being further used for receiving unit 301 not receive user terminal at k-th time slot
The access request message sending, then the wireless channel entering+1 time slot of kth accesses；If it is determined that active user
Terminal returns the 1st grade of point of interruption accessing process, and this point of interruption is for currently assigned time window not
A rear time slot, then the wireless channel entering next time slot accesses, if until this time window specified
Last time slot terminates, do not receive again user terminal send access request message, then terminate currently without
Line channel access process.
It is preferred that
When n is equal to 1, described n-th grade is accessed process message for accessing notification message；
When n is not equal to 1, described n-th grade of access process message is interrupt message.
It is preferred that
Transmitting element 302, is further used in any level access process, if this AP needs to send data,
Then send message informing user terminal interrupts current radio channel to access, and send data；Sending data knot
Shu Hou, sends to user terminal and returns message, makes user terminal return the point of interruption and proceeds wireless channel
Access.
It is preferred that
Described access request message is synchronizing sequence；
Described interrupt message is that the synchronizing sequence that two continuous slots repeat to send and phase place is identical is constituted；
Described return message is that two continuous sequential repeat transmission and the synchronizing sequence of opposite in phase is constituted.
For wlan system, above-mentioned synchronizing sequence is short training sequence (STF).
The unit of above-described embodiment can be integrated in one, it is also possible to separates and disposes；One can be merged into
Unit, it is also possible to be further split into multiple subelement.
In sum, the application has clear superiority on channel transport efficiency, particularly user very
Many situations.On the one hand, the technical scheme that the application provides accesses channel with can making user's steady ordered,
When even user is very many, can effectively reduce inter-user interference, thus significantly reduce re-transmission
Probability.On the other hand, the signaling consumption of the application mainly accesses process at last 1 to 2 grade, works as user
When number increases, the corresponding access process progression that increases can't substantially increase signaling consumption.Additionally, the application
In required mutual main signaling message length very short, taking seldom of channel resource.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Within the spirit of invention and principle, any modification, equivalent substitution and improvement etc. done, should be included in
Within the scope of protection of the invention.
Claims (10)
1. a wireless channel cut-in method, is applied in wireless access point AP, it is characterised in that the party
Method includes:
This AP is transmitted into n-th grade and accesses process message, and the user terminal making startup n-th grade access process exists
Time window is specified to select to send out the time slot sending access request message, if not examining before the time slot selecting reaches
Measure channel occupied, then send access request message at this time slot；
If this AP receives access request message at k-th time slot, then the finish time of k-th time slot is set
It is set to the point of interruption, and sends interrupt message notice user terminal, if n is less than N, then make to send at time slot k
The user terminal of access request message starts (n+1)th grade and accesses process；If n is equal to N, then make at time slot k
The user terminal sending access request message sends data；N is the access process progression of configuration, and n is 1 to N
Integer；
This AP is receiving the data that user terminal sends, or Preset Time is then, sends and returns message；If
K is less than K, then make user terminal be returned for the point of interruption of k-th time slot setting, for+1 time slot of kth
Carry out channel access；If k is equal to K, then user terminal is made to return last interruption that n-1 level accesses process
Point；K is the number of time slots of a time window, and k is the integer of 1 to K；
This AP is if it is determined that active user's terminal returns the 1st grade of point of interruption accessing process, and this point of interruption is pin
The point of interruption arranging last time slot of currently assigned time window, then terminate current radio channel and access
Process.
2. method according to claim 1, it is characterised in that described method farther includes:
If this AP does not receives, at k-th time slot, the access request message that user terminal sends, then enter the
The wireless channel of k+1 time slot accesses；
This AP is if it is determined that active user's terminal returns the 1st grade of point of interruption accessing process, and this point of interruption is not
Last time slot of currently assigned time window, then the wireless channel entering next time slot accesses, if
Until last time slot of this time window specified terminates, do not receive the access that user terminal sends again
Request message, then terminate current radio channel access procedure.
3. method according to claim 1, it is characterised in that
When n is equal to 1, described n-th grade is accessed process message for accessing notification message；
When n is not equal to 1, described n-th grade of access process message is interrupt message.
4. the method according to claim 1-3 any one, it is characterised in that described method is further
Including:
In any level access process, if this AP needs to send data, then send in message informing user terminal
Disconnected current radio channel accesses, and sends data；
This AP, after sending ED, sends to user terminal and returns message, makes user terminal return and interrupts
Point proceeds the access of wireless channel.
5. the method according to claim 1-3 any one, it is characterised in that
Described access request message is synchronizing sequence；
Described interrupt message is that the synchronizing sequence that two continuous slots repeat to send and phase place is identical is constituted；
Described return message is that two continuous sequential repeat transmission and the synchronizing sequence of opposite in phase is constituted.
6. a wireless channel access device, is applied in wireless access point AP, it is characterised in that this dress
Put and include: receiving unit, transmitting element and processing unit；
Described receiving unit, is used for receiving access request message；Receive the data that user terminal sends；
Described transmitting element, is used for being transmitted into n-th grade and accesses process message, make n-th grade of access process of startup
User terminal at the appointed time window selection send out the time slot sending access request message, if select time slot
It is not detected by channel before arrival occupied, then send access request message at this time slot；Process list when described
When the finish time of k-th time slot is set to the point of interruption by unit, send interrupt message notice user terminal, if n
Less than N, then the user terminal sending access request message at time slot k is made to start (n+1)th grade of access process；
If n is equal to N, then the user terminal sending access request message at time slot k is made to send data；N is configuration
Access process progression, n is 1 to the integer of N；When described receiving unit receives what user terminal sent
Data, or Preset Time is then, sends and returns message；If k is less than K, then user terminal is made to be returned for
The point of interruption of k-th time slot setting, carries out channel access for+1 time slot of kth；If k is equal to K, then
User terminal is made to return last point of interruption that n-1 level accesses process；K is the time slot of a time window
Number, k is the integer of 1 to K；
Described processing unit, if for receiving access request as this AP of described receiving unit at k-th time slot
During message, then the finish time of k-th time slot is set to the point of interruption；If it is determined that active user's terminal returns
The 1st grade of point of interruption accessing process, and this point of interruption is for during for last of currently assigned time window
The point of interruption that gap is arranged, then terminate current radio channel access procedure.
7. device according to claim 6, it is characterised in that
Described processing unit, if being further used for described receiving unit not receive user terminal at k-th time slot
The access request message sending, then the wireless channel entering+1 time slot of kth accesses；If it is determined that active user
Terminal returns the 1st grade of point of interruption accessing process, and this point of interruption is for currently assigned time window not
A rear time slot, then the wireless channel entering next time slot accesses, if until this time window specified
Last time slot terminates, do not receive again user terminal send access request message, then terminate currently without
Line channel access process.
8. device according to claim 6, it is characterised in that
When n is equal to 1, described n-th grade is accessed process message for accessing notification message；
When n is not equal to 1, described n-th grade of access process message is interrupt message.
9. the device according to claim 6-8 any one, it is characterised in that
Described transmitting element, is further used in any level access process, if this AP needs to send data,
Then send message informing user terminal interrupts current radio channel to access, and send data；Sending data knot
Shu Hou, sends to user terminal and returns message, makes user terminal return the point of interruption and proceeds wireless channel
Access.
10. the device according to claim 6-8 any one, it is characterised in that
Described access request message is synchronizing sequence；
Described interrupt message is that the synchronizing sequence that two continuous slots repeat to send and phase place is identical is constituted；
Described return message is that two continuous sequential repeat transmission and the synchronizing sequence of opposite in phase is constituted.
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Cited By (1)
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| CN109640396A (en) * | 2017-10-09 | 2019-04-16 | 中兴通讯股份有限公司 | Method for transmitting signals, relevant device and storage medium |
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| EP4340308A1 (en) * | 2022-09-19 | 2024-03-20 | Intel Corporation | Early termination of physical layer convergence protocol data unit transmission |
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Effective date of registration: 20211230 Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF INFORMATION AND COMMUNICATIONS Address before: 100191 No. 52 Garden North Road, Beijing, Haidian District Patentee before: CHINA ACADEME OF TELECOMMUNICATION RESEARCH OF MIIT |