CN107926061A

CN107926061A - A kind of back-off method, transmission message approach and device

Info

Publication number: CN107926061A
Application number: CN201580082472.9A
Authority: CN
Inventors: 丁志明; 禄·彼得
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-08-21
Filing date: 2015-08-21
Publication date: 2018-04-17
Anticipated expiration: 2035-08-21
Also published as: WO2017031645A1; CN107926061B

Abstract

A kind of back-off method and device, including：First node starts backoff counter；The first node is taken in the corresponding channel of backoff counter for determining to start by section point by spatial multiplexing mode, and after the channel cannot be taken jointly by spatial multiplexing mode and section point, continue the backoff counter to be counted or reduced the count value of the backoff counter.One kind transmission message approach and device, including：First node determines the first node just in busy channel；The first node sends message by the channel, and the message includes spatial reuse configured information；The spatial reuse configured information is used to indicate that the receiving node of the message to determine that the first node takes the occupancy mode of the channel according to the spatial reuse configured information, and when the first node takes the channel by spatial multiplexing mode, indicate that the receiving node of the message is taken by competitive way and send response message to the first node after the channel；And/or, the non-reception node that the spatial reuse configured information is used to indicate to intercept the channel determines that the first node takes the occupancy mode of the channel according to the spatial reuse configured information, and when the first node takes the channel by spatial multiplexing mode, instruction takes the channel after intercepting the non-reception node wait channel idle of the channel.

Description

A kind of back-off method, transmission message approach and device

Technical field

The present invention relates to field of communication technology more particularly to a kind of back-off methods, transmission message approach and device.

Background technique

It is universal with intelligent terminal with the development of mobile internet, data traffic rapid growth.WLAN (Wireless Local Area Network, WLAN) relies on the advantage of high-speed and low cost aspect, becomes one of mobile broadband access technology of mainstream.

Node in WLAN sends message by way of competitive channel, and the mechanism that a STA (Station, website) or AP (Access Point, access point) for being ready for sending message needs to take competition sends message.STA or AP are before being ready for sending message, a number is first randomly generated as the count value in backoff counter (backoff counter), then channel is begun listening for, it is in idle condition when determining channel in the time slot (time slot), the then count value execution operation that subtracts one in backoff counter, when determining that channel is in busy state, then the count value stopping in backoff counter subtracts one, is further continued for executing the operation that subtracts one when channel idle.When the count value in backoff counter reduces to 0, then message can be sent.Above-mentioned to be known as keeping out of the way (backoff) process, this competition mechanism can be to avoid two nodes due to conflicting caused by sending message simultaneously, but communication efficiency is not high.

In order to improve communication efficiency, SR (Spatial Reuse, spatial reuse) technology is proposed in next-generation WLAN standard 802.11ax, can send message simultaneously using two phase neighbor nodes of SR technology.For example, as shown in Figure 1, being a kind of multinode distribution schematic diagram provided in an embodiment of the present invention.In Fig. 1, STA3 and STA2 cover mutually other side, and STA3 and STA5 are covered mutually, and STA2 and STA5 distance is farther out, does not cover mutually.Assuming that STA2 will transmit data to STA1, STA3 will transmit data to STA4, and STA5 will transmit data to STA6, and STA2, STA3, STA5 need competitive channel at this time.In conjunction with Fig. 1, as shown in Fig. 2, for a kind of multinode transmission schematic diagram provided in an embodiment of the present invention. STA2, STA3, STA5 generate initial count value R1, R2, R3, and R1 < R2 < R3 at random respectively in Fig. 2, and because of channel idle, three STA are started counting respectively.STA2 count down to 0 first, then starts busy channel and sends message.When STA2 starts to send message, STA3 listens to the message of the transmission of STA2, counts in being off.Meanwhile STA3 is it needs to be determined that go out to receive the reception power for the message that STA2 is sent, and obtain sender's mark from the message that the STA2 received is sent, recipient's mark, send the information such as power.STA3 judges that if STA3 and STA2 send message simultaneously according to these information, the message that STA2 is sent can or can not be received to the receiving end of the STA2 message sent and had an impact, however, it is determined that will not had an impact, then be sent simultaneously with STA2.When STA3 is when listening to the message of STA2 transmission, STA5 listens to the message less than STA2 and STA3 transmission, it is believed that channel idle continues to count.Later, when STA3 and STA2 send message simultaneously, STA5 stops counting, and until the transmission of STA3 message terminates, STA5 is further continued for counting.It should be noted that STA3 is needed when STA2 sends the end of message, while the transmission of end message, response (Acknowledgement, ACK) frame is sent to STA2 in order to avoid influencing STA1.

In the above process, script STA2 and STA5, which send message, can all cause STA3 to stop backoff procedure, and STA5 only stops backoff procedure when STA3 sends message, after using SR technology, because STA3 and STA2 can send message simultaneously, STA2 competition is equal to channel helps STA3 to occupy to channel, and STA5 is caused to greatly reduce using the chance of channel.

To sum up, using SR technology WLAN in, the chance for being postponed the node busy channel of busy channel can be reduced, cause the node can not normal competition channel, to reduce the node to the utilization rate of channel.

Summary of the invention

The embodiment of the present invention provides a kind of back-off method, transmission message approach and device, to ensure in the WLAN using SR technology, improves the chance for being postponed the node busy channel of busy channel.

In a first aspect, a kind of back-off method is provided, this method comprises:

First node starts backoff counter；

The first node passes through space by second node in the corresponding channel of backoff counter for determining starting Multiplex mode occupies, and after cannot occupying jointly the channel by spatial multiplexing mode and second node, continues the count value for the backoff counter being counted or being reduced the backoff counter.

With reference to first aspect, in the first possible implementation of the first aspect, the first node do not suspend the backoff counter or reduce the backoff counter count value before, further includes:

The first node determines that there is no other neighbor nodes other than the second node in the first node signal cover；Alternatively,

The first node determines that there is no other neighbor nodes other than the receiving node of the second node, the first node in the first node signal cover.

With reference to first aspect or the first possible implementation of first aspect, in the second possible implementation of the first aspect, the first node reduces the count value of the backoff counter and suspends the backoff counter.

With reference to first aspect or the first possible implementation of first aspect, in a third possible implementation of the first aspect, the first node reduces the count value of the backoff counter, comprising:

The first node periodically reduces the count value of the backoff counter during the second node occupies the channel.

With reference to first aspect or the first possible implementation of first aspect, in a fourth possible implementation of the first aspect, the first node reduces the count value of the backoff counter, comprising:

The current count value of the backoff counter multiplied by coefficient and is rounded by the first node, wherein the coefficient is greater than 0 and less than 1；

The first node count value that the numerical value after rounding is current as the backoff counter.

With reference to first aspect or the first possible implementation of first aspect, in the fifth possible implementation of the first aspect, the first node reduces the count value of the backoff counter, comprising:

If the difference of the current count value of the backoff counter and threshold value, less than 0, the first node is by 0 count value current as the backoff counter；

If the difference of the current count value of the backoff counter and the threshold value is not less than 0, the first node takes the difference as the current count value of the backoff counter.

With reference to first aspect or the first possible implementation of first aspect, the of first aspect In six kinds of possible implementations, the first node judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

The first node listens to the first message that the second node is sent to other nodes, includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel in the first message；

The first node determines whether the second node passes through spatial multiplexing mode and occupy the channel according to the spatial reuse instruction information in the first message.

With reference to first aspect or first aspect the first to any one possible implementation in the 6th kind, in a seventh possible implementation of the first aspect, this method further include:

The first node sends second message after busy channel, through the channel, wherein includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the first node occupies the channel in the second message.

The 7th kind of possible implementation with reference to first aspect, in the 8th kind of possible implementation of first aspect, the spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.

With reference to first aspect or first aspect the first to any one possible implementation in the 8th kind, in the 9th kind of possible implementation of first aspect, this method further include:

The first node receives the third message that third node is sent, and includes that spatial reuse indicates information in the third message；

After the first node determines the channel that the third node is occupied by spatial multiplexing mode according to the spatial reuse instruction information in the third message, occupied after the channel through the channel by competitive way to third node transmission response message.

Second aspect provides a kind of transmission message approach, this method comprises:

First node determines the first node just in busy channel；

The first node sends message by the channel, includes that spatial reuse indicates information in the message；

The receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and logical in the first node When crossing spatial multiplexing mode and occupying the channel, indicate that the receiving node of the message is occupied after the channel by competitive way to first node transmission response message；And/or

Spatial reuse instruction information, which is used to indicate, to be listened to the non-reception node of the channel and indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, the non-reception node that the channel is listened in instruction occupies the channel after waiting the channel idle.

The third aspect provides a kind of transmission message approach, this method comprises:

First node receives the message that second node is sent, and includes that spatial reuse indicates information in the message that the second node is sent；

After spatial reuse instruction information in the message that the first node is sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.

Fourth aspect provides a kind of transmission message approach, this method comprises:

First node listens to the message that third node is sent in channel, includes that spatial reuse indicates information in the message that the third node is sent；

After spatial reuse instruction information in the message that the first node is sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, the channel is occupied after waiting the channel idle.

5th aspect, provides a kind of Withdraw and keep-off device, which includes:

Start unit, for starting backoff counter；

Processing unit, for being occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continue the count value for the backoff counter being counted or being reduced the backoff counter.

In conjunction with the 5th aspect, in the first possible implementation of the 5th aspect, the processing unit is also used to:

Determine that there is no other neighbor nodes other than the second node in first node signal cover；Alternatively,

Determine that there is no other neighbor nodes other than the receiving node of the second node, the first node in the first node signal cover.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in second of possible implementation of the 5th aspect, the processing unit reduces the count value of the backoff counter and suspends the backoff counter.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in the third possible implementation of the 5th aspect, the processing unit is specifically used for:

During the second node occupies the channel, the count value of the backoff counter is periodically reduced.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in the 4th kind of possible implementation of the 5th aspect, the processing unit is specifically used for:

The current count value of the backoff counter multiplied by coefficient and is rounded, wherein the coefficient is greater than 0 and less than 1；

Using the count value current as the backoff counter of the numerical value after rounding.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in the 5th kind of possible implementation of the 5th aspect, the processing unit is specifically used for:

If the difference of the current count value of the backoff counter and threshold value is less than 0, by 0 count value current as the backoff counter；

If the difference of the current count value of the backoff counter and the threshold value is not less than 0, the current count value of the backoff counter is taked the difference as.

In conjunction with the first possible implementation of the 5th aspect or the 5th aspect, in the 6th kind of possible implementation of the 5th aspect, the processing unit judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

The first message that the second node is sent to other nodes is listened to, includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel in the first message；

Determine whether the second node passes through sky according to the spatial reuse instruction information in the first message Between multiplex mode occupy the channel.

In conjunction with the first of the 5th aspect or the 5th aspect to any one possible implementation in the 6th kind, in the 7th kind of possible implementation of the 5th aspect, which further includes transmission unit:

The transmission unit, for sending second message by the channel after busy channel, wherein include that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the first node occupies the channel in the second message.

In conjunction with the 7th kind of possible implementation of the 5th aspect, the spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.

In conjunction with the first of the 5th aspect or the 5th aspect to any one possible implementation in the 8th kind, in the 9th kind of possible implementation of the 5th aspect, which further includes receiving unit:

The receiving unit includes that spatial reuse indicates information for receiving the third message of third node transmission, in the third message；

After determining the channel that the third node is occupied by spatial multiplexing mode according to the spatial reuse instruction information in the third message, occupied after the channel through the channel by competitive way to third node transmission response message.

6th aspect, provides a kind of transmission information apparatus, which includes:

Determination unit, for determining just in busy channel；

Transmission unit, for sending message by the channel, it include that spatial reuse indicates information in the message, the receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or

7th aspect, provides a kind of transmission information apparatus, which includes:

Receiving unit includes that spatial reuse indicates information for receiving the message of second node transmission, in the message that the second node is sent；

Transmission unit, after spatial reuse instruction information in message for being sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.

Eighth aspect, provides a kind of transmission information apparatus, which includes:

Unit is listened to, includes that spatial reuse indicates information for listening to the message that third node is sent in channel, in the message that the third node is sent；

Determination unit occupies the channel after waiting the channel idle after the spatial reuse instruction information in the message for sending according to the third node determines the channel that the third node is occupied by spatial multiplexing mode.

9th aspect, provides a kind of transmission information apparatus, which includes interface, processor, memory and transceiver:

Processor, for executing following process:

Start backoff counter；

It is occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continue the count value for the backoff counter being counted or being reduced the backoff counter.

In conjunction with the 9th aspect, in the first possible implementation of the 9th aspect, processor is also used to:

In conjunction with the first possible implementation of the 9th aspect or the 9th aspect, in second of possible implementation of the 9th aspect, processor reduces the count value of the backoff counter and suspends the backoff counter.

In conjunction with the first possible implementation of the 9th aspect or the 9th aspect, the of the 9th aspect In three kinds of possible implementations, processor is specifically used for:

In conjunction with the first possible implementation of the 9th aspect or the 9th aspect, in the 4th kind of possible implementation of the 9th aspect, processor is specifically used for:

In conjunction with the first possible implementation of the 9th aspect or the 9th aspect, in the 5th kind of possible implementation of the 9th aspect, processor is specifically used for:

In conjunction with the first possible implementation of the 9th aspect or the 9th aspect, in the 6th kind of possible implementation of the 9th aspect, processor judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

Determine whether the second node passes through spatial multiplexing mode and occupy the channel according to the spatial reuse instruction information in the first message.

In conjunction with the first of the 9th aspect or the 9th aspect to any one possible implementation in the 6th kind, in the 7th kind of possible implementation of the 9th aspect, processor is also used to:

After busy channel, second message is sent by the channel, wherein include that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that first node occupies the channel in the second message.

In conjunction with the 7th kind of possible implementation of the 9th aspect, in the 8th kind of possible implementation of the 9th aspect, the spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.

In conjunction with the first of the 9th aspect or the 9th aspect to any one possible implementation in the 8th kind, in the 9th kind of possible implementation of the 9th aspect, processor is also used to:

The third message that third node is sent is received, includes that spatial reuse indicates information in the third message；

Tenth aspect, provides a kind of transmission information apparatus, which includes interface, processor, memory and transceiver:

Processor, for executing following process:

It determines just in busy channel；

Message is sent by the channel, it include that spatial reuse indicates information in the message, the receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or

On the one hand tenth, provides a kind of transmission information apparatus, which includes interface, processor, memory and transceiver:

Processor, for executing following process:

The message that second node is sent is received, includes that spatial reuse indicates information in the message that the second node is sent；

Spatial reuse instruction information in the message sent according to the second node determines the second node After the channel occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.

12nd aspect, provides a kind of transmission information apparatus, which includes interface, processor, memory and transceiver:

Processor, for executing following process:

The message that third node is sent in channel is listened to, includes that spatial reuse indicates information in the message that the third node is sent；

After spatial reuse instruction information in the message sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, the channel is occupied after waiting the channel idle.

The method and device provided according to embodiments of the present invention, first node is occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied by spatial multiplexing mode and second node, it is not pause backoff counter, and it is to continue with the counting of backoff counter or reduces the count value of backoff counter, to reduce the first node back off time required when executing backoff procedure, the chance for improving first node busy channel improves the utilization rate of channel.

Detailed description of the invention

Fig. 1 is a kind of multinode distribution schematic diagram provided in an embodiment of the present invention；

Fig. 2 is that a kind of multinode provided in an embodiment of the present invention transmits schematic diagram；

Fig. 3 is a kind of message structure schematic diagram provided in an embodiment of the present invention；

Fig. 4 is a kind of back-off method flow diagram provided in an embodiment of the present invention；

Fig. 5 is a kind of transmission message approach flow diagram provided in an embodiment of the present invention；

Fig. 6 is a kind of transmission message approach flow diagram provided in an embodiment of the present invention；

Fig. 7 is a kind of transmission message approach flow diagram provided in an embodiment of the present invention；

Fig. 8 is a kind of Withdraw and keep-off device structural schematic diagram provided in an embodiment of the present invention；

Fig. 9 is a kind of transmission information apparatus structural schematic diagram provided in an embodiment of the present invention；

Figure 10 is a kind of transmission information apparatus structural schematic diagram provided in an embodiment of the present invention；

Figure 11 is a kind of transmission information apparatus structural schematic diagram provided in an embodiment of the present invention；

Figure 12 is another Withdraw and keep-off device structural schematic diagram provided in an embodiment of the present invention；

Figure 13 is another transmission information apparatus structural schematic diagram provided in an embodiment of the present invention；

Figure 14 is another transmission information apparatus structural schematic diagram provided in an embodiment of the present invention；

Figure 15 is another transmission information apparatus structural schematic diagram provided in an embodiment of the present invention.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be describe below in further detail with reference to the accompanying drawings, it is clear that the described embodiments are only some of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, all other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall within the protection scope of the present invention.

The embodiment of the present invention is described in detail with reference to the accompanying drawings of the specification.

In the embodiment of the present invention, the node of channel competition is participated in front of being ready for sending message, and a number is first randomly generated as the count value in backoff counter, then begins listening for channel and executes backoff procedure.After node competition is to channel, start to send message in the channel.After node determines that channel is occupied in backoff procedure, in order to determine whether and just pass through the common busy channel of spatial multiplexing mode in the node of busy channel, node, which can also listen to, is just sent to the message of other nodes in the node of busy channel, to determine whether the message transmitted in parallel sent with this node.

In the embodiment of the present invention, the format for the message that node is sent can be as shown in Figure 3.Fig. 3 is a kind of message structure schematic diagram provided in an embodiment of the present invention.In Fig. 3, including legacy preamble (legacy preamble), repeat traditional signaling message (Repeated Legacy Signal field, R-L-SIG), the PSDU (Physical layer Service Data Unit, physical layer service data) that physics header field and the frame such as HE leading (High Efficiency preamble) are carried.In Fig. 3, HE leading includes HE signaling (High Efficiency Signal, HE-SIG), HE short training sequence (High Efficiency Short Training Field,) and HE long training sequence (High Efficiency Long Training Field, HE-LTF) HE-STF.

Based on above-mentioned discussion, as shown in figure 4, a kind of back-off method process provided in an embodiment of the present invention is shown It is intended to.First node in Fig. 4 can be the devices such as AP, STA, and second node can be the devices such as AP, STA.

As shown in figure 4, this method specifically includes the following steps:

Step 401: first node starts backoff counter；

Step 402: the first node is occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continue the count value for the backoff counter being counted or being reduced the backoff counter.

In step 401, before first node starts backoff counter, count value of the random number as backoff counter can be first generated.After first node starts backoff counter, begins listening for channel and count.

For example, when first node determines that channel is in idle condition in a time slot, the count value in backoff counter is subtracted one.The length of one time slot is generally preset in the standard of WLAN.

In step 402, first node is after busy channel, second message can be sent by the channel, wherein, it include that spatial reuse indicates information in the second message, the spatial reuse instruction information is used to indicate the occupancy mode that the first node occupies the channel, i.e. spatial reuse instruction information can indicate that first node is by spatial multiplexing mode busy channel or by competitive way busy channel.After other nodes listen to the second message of first node transmission, the spatial reuse instruction information in second message that can be sent according to the first node listened to determines that first node occupies the occupancy mode of the channel.

For example, spatial reuse instruction information can make an appointment for a bit in the physical header of message, the bit.For example, indicating that the node of busy channel is the channel occupied by executing backoff procedure when the value of the bit is 0；When the value of the bit is 1, indicate that the node of busy channel is the channel occupied by spatial multiplexing mode.It should be noted that spatial reuse instruction information can also indicate that the embodiment of the present invention does not limit this with multiple bits.

Preferably, in the HE signaling HE-SIG for the physical header that spatial reuse instruction information is located at message.Spatial reuse instruction information, which can be, to be made of any one dedicated bit in HE-SIG or is made of in conjunction with other instruction information multiple bits, and the embodiment of the present invention does not limit this.

Since receiving node is after the message for receiving sending node transmission, it needs to return to a response message to sending node, in order to avoid the response message for receiving the transmission of its receiving node to the sending node (by the node of competitive way busy channel) being re-used by the node of spatial multiplexing mode busy channel generates interference, it is needed before terminating busy channel by the node of competitive way busy channel by the node of spatial multiplexing mode busy channel, terminate the message sent, or terminate the message sent simultaneously with by the node of competitive way busy channel.

Response message may be sent simultaneously with the receiving node of the node by competitive way busy channel by the receiving node of the node of spatial multiplexing mode busy channel, to cause to interfere with each other.In the embodiment of the present invention, information is indicated by carrying spatial reuse in the message that sending node is sent, and receiving node can indicate that information determines that its corresponding sending node is the channel occupied by spatial multiplexing mode or competitive way according to the spatial reuse in the message received.If receiving node determines that sending node is not respond immediately to response message after receiving the message by spatial multiplexing mode busy channel, but use competitive way after competing to channel, response message is replied by the channel competed.It should be noted that receiving node determines that sending node is by that can also reply response message using other modes, details are not described herein after spatial multiplexing mode busy channel in the embodiment of the present invention.

Correspondingly, first node receives the third message that third node is sent in conjunction with above description, it include that spatial reuse indicates information in the third message that the third node is sent；After spatial reuse instruction information in the third message that the first node is sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, the channel is occupied after the channel to third node transmission response message by competitive way.

It should be noted that, when spatial reuse instruction information also can indicate that listening to message that the node of message listens to described in the determination is to transmit by spatial multiplexing mode, it does not use spatial multiplexing mode and the nodal parallel by spatial multiplexing mode busy channel transmits message, but occupy the channel after waiting the channel idle.It can certainly be not limited.

In the embodiment of the present invention, if first node competition sends message to channel, by the channel competed.If first node does not compete channel, first node may determine that whether the second node of busy channel is to occupy the channel jointly by spatial multiplexing mode, if so, sky cannot be passed through by directly determining Between multiplex mode occupy the channel jointly, if not, then judge whether that the channel can be occupied jointly by spatial multiplexing mode with the second node of busy channel, if the channel can be occupied jointly by spatial multiplexing mode with the second node of busy channel, message is sent by the channel；First node can not also judge whether the second node of busy channel passes through spatial multiplexing mode and occupy the channel jointly, and always judge whether that the channel can be occupied jointly by spatial multiplexing mode with the second node of busy channel, if the channel can be occupied jointly by spatial multiplexing mode with the second node of busy channel, message is sent by the channel.

If first node determines that channel is occupied by second node by spatial multiplexing mode, and determination cannot occupy jointly the channel by spatial multiplexing mode with second node, then can not suspend the backoff counter or reduce the count value of the backoff counter.

In conjunction with above description, first node can judge whether second node passes through spatial multiplexing mode busy channel according to following manner:

First node listens to the first message that the second node is sent to other nodes, it includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel that the second node, which is sent in the first message of other nodes,；Spatial reuse instruction information in the first message that the first node is sent according to the second node determines whether the second node passes through spatial multiplexing mode and occupy the channel.

First node does not suspend before the count value of backoff counter or the reduction backoff counter, it is also possible to need to be determined whether according to the quantity of its neighbor node not suspend backoff counter or reduce the count value of backoff counter.

Preferably, first node do not suspend backoff counter or reduce the backoff counter count value before, it is also possible to need to meet any one following condition:

Condition one: first node determines that there is no other neighbor nodes other than the second node in the first node signal cover.

Condition two: first node determines that there is no other neighbor nodes other than the receiving node of the second node, the first node in the first node signal cover.

With this condition, the receiving node of first node is established with first node connect, and first node Message sender, thus the receiving node of the first node will not competitive channel to other nodes send message, can be excluded.

If first node does not suspend backoff counter, the backoff counter will continue to count downwards, if before channel idle, the back-off counters to 0, then the backoff counter be always maintained at be counted as 0 state, and the busy channel after channel idle.

The purpose that first node reduces the count value of backoff counter is in order to when the channel is idle, reduce back off time needed for first node executes backoff procedure, to improve the chance of competitive channel.

Preferably, first node reduces the count value of the backoff counter and suspends the backoff counter.

First node can reduce the count value of backoff counter in several ways, describe separately below.

The first possible embodiment:

The current count value of backoff counter multiplied by coefficient and is rounded by first node, wherein the coefficient is greater than 0 and less than 1；The first node count value that the numerical value after rounding is current as the backoff counter.

For example, the current count value of backoff counter is A, A >=0.By A multiplied by coefficient B, 0 < B < 1 obtains C=A × B, after being rounded to C, the C count value current as backoff counter is replaced A with C first node.At this point, when the channel is idle, the backoff counter of first node executes backoff procedure since C.

It should be noted that can be rounded downwards when being rounded, can also round up, the embodiment of the present invention does not limit this.

Second of possible embodiment:

If the difference of the current count value of backoff counter and threshold value, less than 0, first node is by 0 count value current as the backoff counter；

For example, the current count value of backoff counter is A, A >=0.A is subtracted threshold value B by first node, obtains C=A-B.Then judge C whether less than 0, if C less than 0, by 0 count value current as backoff counter, the otherwise count value that C is current as backoff counter, i.e., with C to A It is replaced.At this point, when the channel is idle, the backoff counter of first node executes backoff procedure since C.

It should be noted that threshold value is positive integer, threshold value can be generated at random every time, can be made an appointment, and can also be determined according to the current count value of backoff counter, the embodiment of the present invention does not limit this.

Preferably, the threshold value is determined by the time span of spatial multiplexing mode busy channel according to second node, specifically, second node is greater than 1 divided by the threshold value, the reduction coefficient is obtained after reduction coefficient by the time span of spatial multiplexing mode busy channel.

For example, the time span that second node passes through spatial multiplexing mode busy channel is 200 microseconds, and reduction coefficient 20, then the threshold value obtained is 10=200/20.

The third possible embodiment:

First node periodically reduces the count value of the backoff counter during the second node occupies the channel.

For example, the current count value of backoff counter is subtracted a fixed value or random value in each period by first node, and when the current count value of backoff counter is kept to less than 0, first node is by 0 count value current as the backoff counter.

First node judges whether the current count value of backoff counter is 0 when determining channel idle, and if 0, then busy channel, otherwise executes backoff procedure according to the current count value of backoff counter.

In above scheme, first node is occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied by spatial multiplexing mode and second node, it is not pause backoff counter, and it is to continue with the counting of backoff counter or reduces the count value of backoff counter, to reduce the first node back off time required when executing backoff procedure, the chance of first node busy channel is improved, the utilization rate of channel is improved.

The utilization efficiency of channel can be effectively improved between node by the common busy channel of spatial multiplexing mode, it is likely that being easier to cause hidden node problem, improve collision probability, it is therefore preferred that when a node use space multiplex mode and a nodal parallel for transmitting message transmit message, node around it can know that this is the transmission of a use space multiplex mode, to no longer further use spatial multiplexing mode and the transmission of this nodal parallel.

Based on above-mentioned discussion, as shown in figure 5, a kind of transmission message approach flow diagram provided in an embodiment of the present invention.First node in Fig. 5 can be the devices such as AP, STA.

As shown in figure 5, this method specifically includes the following steps:

Step 501: first node determines the first node just in busy channel；

Step 502: the first node sends message by the channel, includes that spatial reuse indicates information in the message；The receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or, spatial reuse instruction information, which is used to indicate, to be listened to the non-reception node of the channel and indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, the non-reception node that the channel is listened in instruction occupies the channel after waiting the channel idle.

In step 501, first node can also pass through spatial multiplexing mode busy channel by competitive way busy channel.

It should be noted that first node specifically how busy channel, the embodiment of the present invention do not limit this.

In step 502, receiving node is node corresponding with the destination address carried in message, corresponding, and non-reception node is node not corresponding with the destination address carried in message.Since node can listen to channel, the message received may not be destined to oneself.

Therefore, after first node sends message by the channel, the node for receiving message may be the receiving node of the message of first node transmission；It may also be other nodes for listening to the channel, i.e., non-reception node.

Spatial reuse instruction information in the message that first node is sent can make an appointment for a bit in message physical header, the bit.For example, indicating that the node of busy channel is the channel occupied by executing backoff procedure when the value of the bit is 0；When the value of the bit is 1, indicate that the node of busy channel is the channel occupied by spatial multiplexing mode.

It should be noted that spatial reuse instruction information can also indicate that the embodiment of the present invention does not limit this with multiple bits.

If the receiving node for the message that first node is sent indicates that information determines that the first node occupies the channel by competitive way according to the spatial reuse, mode specified in standard of the receiving node according to existing WLAN sends response message to the first node.For example, sending response message to the first node by the channel after first node message is sent.

It should be noted that when the receiving node for the message that first node is sent determines that the first node occupies the channel by competitive way response message can also be sent to the first node otherwise, the embodiment of the present invention does not limit this.

If the receiving node for the message that first node is sent indicates that information determines that the first node occupies the channel by spatial multiplexing mode according to the spatial reuse, occupied after the channel by competitive way to first node transmission response message.

When listening to the non-reception node of the channel and indicating that information determines that the first node occupies the channel by competitive way according to the spatial reuse, it may determine whether and the common busy channel of the first node, if the non-reception section determination can be to occupy the channel by spatial multiplexing mode and the first node jointly.

First node may listen to channel or receive the message that second node is sent in unoccupied channel.

First node can determine how according to the occupancy mode of second node busy channel when receiving the message that second node is sent and send response message to second node.Specifically, first node receives the message that second node is sent, it include that spatial reuse indicates information in the message that the second node is sent；After spatial reuse instruction information in the message that the first node is sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.The first node is sent according to the second node After spatial reuse instruction information in message determines the channel that the second node is occupied by competitive way, mode specified in the standard according to existing WLAN is to first node transmission response message.

When listening to channel, meeting basis just determines whether in the occupancy mode of the third node busy channel of busy channel through spatial multiplexing mode and the third node common busy channel first node.Specifically, first node listens to the message that third node is sent in the channel, it include that spatial reuse indicates information in the message that the third node is sent；After spatial reuse instruction information in the message that the first node is sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, it determines not by spatial multiplexing mode and the common busy channel of third node, but occupies the channel after waiting the channel idle.After if the spatial reuse instruction information in the message that first node is sent according to the third node determines the channel that the third node is occupied by competitive way, the channel whether first node can occupy with the third node by competitive way may be judged, and after the channel that determination can be occupied with the third node by competitive way, message is sent by the channel.

Based on above-mentioned discussion, as shown in fig. 6, a kind of transmission message approach flow diagram provided in an embodiment of the present invention.First node in Fig. 6 can be the devices such as AP, STA.

As shown in fig. 6, this method specifically includes the following steps:

Step 601: first node receives the message that second node is sent, and includes that spatial reuse indicates information in the message that the second node is sent；

Step 602: after spatial reuse in the message that the first node is sent according to second node instruction information determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.

It should be noted that the particular content of step 601 and step 602 can be with reference to the description in Fig. 4 and Fig. 5, details are not described herein.

Based on above-mentioned discussion, as shown in fig. 7, a kind of transmission message approach flow diagram provided in an embodiment of the present invention.First node in Fig. 7 can be the devices such as AP, STA.

As shown in fig. 7, this method specifically includes the following steps:

Step 701: first node listens to the message that third node is sent in channel, includes that spatial reuse indicates information in the message that the third node is sent；

Step 702: after spatial reuse in the message that the first node is sent according to third node instruction information determines the channel that the third node is occupied by spatial multiplexing mode, occupying the channel after waiting the channel idle.

It should be noted that the particular content of step 701 and step 702 can be with reference to the description in Fig. 4 and Fig. 5, details are not described herein.

In above scheme, it include the spatial reuse instruction information for being used to indicate first node busy channel mode in the message that first node is sent, therefore after other nodes receive or listen to the message of first node transmission, it can determine that first node is the channel occupied by spatial multiplexing mode or the channel occupied by competitive way.Other nodes determine first node be by spatial multiplexing mode occupy channel after, not immediately to first node send response message；And/or the utilization rate of channel is not improved to reduce the probability that the message sent between node interferes with each other by spatial multiplexing mode and the common busy channel of the first node.

For above method process, the embodiment of the present invention also provides a kind of Withdraw and keep-off device, and the particular content of the device is referred to above method implementation, and details are not described herein.

Such as figure: shown in 8, the embodiment of the present invention provides a kind of Withdraw and keep-off device structural schematic diagram.

The device can be used for executing method shown in Fig. 4.

Referring to Fig. 8, which includes:

Start unit 801, for starting backoff counter；

Processing unit 802, for being occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continue the count value for the backoff counter being counted or being reduced the backoff counter.

Preferably, the processing unit 802 is also used to:

Preferably, the processing unit 802 reduce the backoff counter count value and pause described in move back Keep away counter.

Preferably, the processing unit 802 is specifically used for:

Preferably, the processing unit 802 judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

Listen to the first message that the second node is sent to other nodes, it includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel that the second node, which is sent in the first message of other nodes,；

Spatial reuse instruction information in the first message sent according to the second node determines whether the second node passes through spatial multiplexing mode and occupy the channel.

Preferably, which further includes transmission unit 803:

The transmission unit 803, for sending second message by the channel after busy channel, wherein include that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that first node occupies the channel in the second message.

Preferably, the spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.

Preferably, which further includes receiving unit 804:

The receiving unit 804 includes that spatial reuse indicates information for receiving the third message of third node transmission, in the third message that the third node is sent；

After spatial reuse instruction information in the third message sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, occupied after the channel through the channel by competitive way to third node transmission response message.

For above method process, the embodiment of the present invention also provides a kind of transmission information apparatus, and the particular content of the device is referred to above method implementation, and details are not described herein.

As shown in figure 9, the embodiment of the present invention provides a kind of transmission information apparatus structural schematic diagram.

The device can be used for executing method shown in fig. 5.

Referring to Fig. 9, which includes:

Determination unit 901, for determining the first node just in busy channel；

Transmission unit 902 includes that spatial reuse indicates information in the message for sending message by the channel；

The receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or

As shown in Figure 10, the embodiment of the present invention provides a kind of transmission information apparatus structural schematic diagram.

The device can be used for executing method shown in fig. 6.

Referring to Figure 10, which includes:

Receiving unit 1001 includes that spatial reuse indicates information for receiving the message of second node transmission, in the message that the second node is sent；

Transmission unit 1002, the spatial reuse in the message for being sent according to the second node indicate letter After breath determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and by the channel to second node transmission response message.

As shown in figure 11, the embodiment of the present invention provides a kind of transmission information apparatus structural schematic diagram.

The device can be used for executing method shown in Fig. 7.

Referring to Figure 11, which includes:

Unit 1101 is listened to, includes that spatial reuse indicates information for listening to the message that third node is sent in channel, in the message that the third node is sent；

Determination unit 1102 occupies the channel after waiting the channel idle after the spatial reuse instruction information in the message for sending according to the third node determines the channel that the third node is occupied by spatial multiplexing mode.

Based on same idea, referring to Figure 12, for a kind of Withdraw and keep-off device 1200 provided in an embodiment of the present invention.The device can be used for executing method shown in Fig. 4.The device can include: interface 1201, processor 1202, memory 1203 and transceiver 1204.Processor 1202 is used to control the operation of sending device 1200；Memory 1203 may include read-only memory and random access memory, for providing instruction and data to processor 1202.The a part of of memory 1203 can also include non-volatile row random access memory (NVRAM).The various components of sending device 1200 are coupled by bus system, and wherein bus system 1209 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 1209 in figure.

Processor 1202, for executing following process:

Start backoff counter；

Preferably, processor 1202 is also used to:

Determine that there is no in addition to the second node, described first in the first node signal cover Other neighbor nodes other than the receiving node of node.

Preferably, processor 1202 reduces the count value of the backoff counter and suspends the backoff counter.

Preferably, processor 1202 is specifically used for:

Preferably, processor 1202 judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

Preferably, processor 1202 is also used to:

Preferably, the spatial reuse instruction information is located at the HE signaling HE-SIG of the message physical header In.

Preferably, processor 1202 is also used to:

The third message that third node is sent is received, includes that spatial reuse indicates information in the third message that the third node is sent；

A kind of back-off method that the embodiment of the present invention discloses can be applied in processor 1202, or be realized by processor 1202.During realization, each step of control plane process flow can be completed by the integrated logic circuit of the hardware in processor 1202 or the instruction of software form.Processor 1202 can be general processor, digital signal processor, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate, and perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be microprocessor or any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 1203, and processor 1202 reads the information in memory 1203, completes a kind of back-off method in conjunction with its hardware.

Based on same idea, referring to Figure 13, for a kind of transmission information apparatus 1300 provided in an embodiment of the present invention.The device can be used for executing method shown in fig. 5.The device can include: interface 1301, processor 1302, memory 1303 and transceiver 1304.Processor 1302 is used to control the operation of sending device 1300；Memory 1303 may include read-only memory and random access memory, for providing instruction and data to processor 1302.The a part of of memory 1303 can also include non-volatile row random access memory (NVRAM).The various components of sending device 1300 are coupled by bus system, and wherein bus system 1309 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 1309 in figure.

Processor 1302, for executing following process:

It determines just in busy channel；

Message is sent by the channel, includes that spatial reuse indicates information in the message；

Based on same idea, referring to Figure 14, for a kind of transmission information apparatus 1400 provided in an embodiment of the present invention.The device can be used for executing method shown in fig. 6.The device can include: interface 1401, processor 1402, memory 1403 and transceiver 1404.Processor 1402 is used to control the operation of sending device 1400；Memory 1403 may include read-only memory and random access memory, for providing instruction and data to processing unit 1402.The a part of of memory 1403 can also include non-volatile row random access memory (NVRAM).The various components of sending device 1400 are coupled by bus system, and wherein bus system 1409 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 1409 in figure.

Processor 1402, for executing following process:

After spatial reuse instruction information in the message sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and by the channel to second node transmission response message.

Based on same idea, referring to Figure 15, for a kind of reception device 1500 provided in an embodiment of the present invention.The device can be used for executing method shown in Fig. 7.The device can include: interface 1501, processor 1502, Memory 1503 and transceiver 1504.Processor 1502 is used to control and receive the operation of device 1500；Memory 1503 may include read-only memory and random access memory, for providing instruction and data to processor 1502.The a part of of memory 1503 can also include non-volatile row random access memory (NVRAM).The various components of reception device 1500 are coupled by bus system, and wherein bus system 1509 further includes power bus, control bus and status signal bus in addition in addition to including data/address bus.But for the sake of clear explanation, various buses are all designated as bus system 1509 in figure.

Processor 1502, for executing following process:

A kind of transmission message approach that the embodiment of the present invention discloses can be applied in processor 1502, or be realized by processor 1502.During realization, each step of control plane process flow can be completed by the integrated logic circuit of the hardware in processor 1502 or the instruction of software form.Processor 1502 can be general processor, digital signal processor, specific integrated circuit, field programmable gate array or other programmable logic device, discrete gate, and perhaps transistor logic, discrete hardware components may be implemented or execute disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be microprocessor or any conventional processor etc..The step of method in conjunction with disclosed in the embodiment of the present invention, can be embodied directly in hardware processor and execute completion, or in processor hardware and software module combination execute completion.Software module can be located at random access memory, flash memory, read-only memory, in the storage medium of this fields such as programmable read only memory or electrically erasable programmable memory, register maturation.The step of storage medium is located at memory 1503, and processor 1502 reads the information in memory 1503, completes a kind of transmission message approach in conjunction with its hardware.

It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program product.Therefore, the form of complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention.Moreover, the present invention, which can be used, can use storage channel (including but not limited to disk in the computer that one or more wherein includes computer usable program code Memory and optical memory etc.) on the form of computer program product implemented.

The present invention be referring to according to the method for the embodiment of the present invention, the flowchart and/or the block diagram of equipment (system) and computer program product describes.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.These computer program instructions be can provide to the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate a machine instruction, so that generating by the instruction that computer or the processor of other programmable data processing devices execute for realizing the device for the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions, which may also be stored in, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including command device, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.

Obviously, those skilled in the art various changes and modifications can be made to the invention without departing from the spirit and scope of the present invention.If then the present invention is also intended to include these modifications and variations in this way, these modifications and changes of the present invention is within the scope of the claims of the present invention and its equivalent technology.

Claims

A kind of back-off method, which is characterized in that this method comprises:

First node starts backoff counter；

The first node is occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continues the counting of the backoff counter or reduce the count value of the backoff counter.
The method according to claim 1, wherein the first node do not suspend the backoff counter or reduce the backoff counter count value before, further includes:

The first node determines that there is no other neighbor nodes other than the second node in the first node signal cover；Alternatively,

The first node determines that there is no other neighbor nodes other than the receiving node of the second node, the first node in the first node signal cover.
According to claim 1 to 2 described in any item methods, which is characterized in that the first node reduces the count value of the backoff counter and suspends the backoff counter.
According to claim 1 to 2 described in any item methods, which is characterized in that the first node reduces the count value of the backoff counter, comprising:

The first node periodically reduces the count value of the backoff counter during the second node occupies the channel.
According to claim 1 to 2 described in any item methods, which is characterized in that the first node reduces the count value of the backoff counter, comprising:

The current count value of the backoff counter multiplied by coefficient and is rounded by the first node, wherein the coefficient is greater than 0 and less than 1；

The first node count value that the numerical value after rounding is current as the backoff counter.
According to claim 1 to 2 described in any item methods, which is characterized in that the first node reduces the count value of the backoff counter, comprising:

If the difference of the current count value of the backoff counter and threshold value, less than 0, the first node will 0 count value current as the backoff counter；

If the difference of the current count value of the backoff counter and the threshold value is not less than 0, the first node takes the difference as the current count value of the backoff counter.
According to claim 1 to 2 described in any item methods, which is characterized in that the first node judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

The first node listens to the first message that the second node is sent to other nodes, includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel in the first message；

The first node determines whether the second node passes through spatial multiplexing mode and occupy the channel according to the spatial reuse instruction information in the first message.
Method according to any one of claims 1 to 7, which is characterized in that this method further include:

The first node sends second message after busy channel, through the channel, wherein includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the first node occupies the channel in the second message.
According to the method described in claim 8, it is characterized in that, spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.
Method according to any one of claims 1 to 9, which is characterized in that this method further include:

The first node receives the third message that third node is sent, and includes that spatial reuse indicates information in the third message；

After the first node determines the channel that the third node is occupied by spatial multiplexing mode according to the spatial reuse instruction information in the third message, occupied after the channel through the channel by competitive way to third node transmission response message.
A kind of transmission message approach, which is characterized in that this method comprises:

First node determines the first node just in busy channel；

The first node sends message by the channel, includes that spatial reuse indicates information in the message；

The receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or

Spatial reuse instruction information, which is used to indicate, to be listened to the non-reception node of the channel and indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, the non-reception node that the channel is listened in instruction occupies the channel after waiting the channel idle.
A kind of transmission message approach, which is characterized in that this method comprises:

First node receives the message that second node is sent, and includes that spatial reuse indicates information in the message that the second node is sent；

After spatial reuse instruction information in the message that the first node is sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.
A kind of transmission message approach, which is characterized in that this method comprises:

First node listens to the message that third node is sent in channel, includes that spatial reuse indicates information in the message that the third node is sent；

After spatial reuse instruction information in the message that the first node is sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, the channel is occupied after waiting the channel idle.
A kind of Withdraw and keep-off device, which is characterized in that the device includes:

Start unit, for starting backoff counter；

Processing unit, for being occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continue the count value for the backoff counter being counted or being reduced the backoff counter.
Device according to claim 14, which is characterized in that the processing unit is also used to:

Determine that there is no other other than the second node in the first node signal cover Neighbor node；Alternatively,

Determine that there is no other neighbor nodes other than the receiving node of the second node, the first node in the first node signal cover.
4 to 15 described in any item devices according to claim 1, which is characterized in that the processing unit reduces the count value of the backoff counter and suspends the backoff counter.
4 to 15 described in any item devices according to claim 1, which is characterized in that the processing unit is specifically used for:

During the second node occupies the channel, the count value of the backoff counter is periodically reduced.
4 to 15 described in any item devices according to claim 1, which is characterized in that the processing unit is specifically used for:

The current count value of the backoff counter multiplied by coefficient and is rounded, wherein the coefficient is greater than 0 and less than 1；

Using the count value current as the backoff counter of the numerical value after rounding.
4 to 15 described in any item devices according to claim 1, which is characterized in that the processing unit is specifically used for:

If the difference of the current count value of the backoff counter and threshold value is less than 0, by 0 count value current as the backoff counter；

If the difference of the current count value of the backoff counter and the threshold value is not less than 0, the current count value of the backoff counter is taked the difference as.
4 to 15 described in any item devices according to claim 1, which is characterized in that the processing unit judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

The first message that the second node is sent to other nodes is listened to, includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel in the first message；

Determine whether the second node passes through spatial multiplexing mode and occupy the channel according to the spatial reuse instruction information in the first message.
4 to 20 described in any item devices according to claim 1, which is characterized in that the device further includes transmission unit:

The transmission unit, for sending second message by the channel after busy channel, wherein include that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that first node occupies the channel in the second message.
Device according to claim 21, which is characterized in that the spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.
4 to 22 described in any item devices according to claim 1, which is characterized in that the device further includes receiving unit:

The receiving unit includes that spatial reuse indicates information for receiving the third message of third node transmission, in the third message；

After determining the channel that the third node is occupied by spatial multiplexing mode according to the spatial reuse instruction information in the third message, occupied after the channel through the channel by competitive way to third node transmission response message.
A kind of transmission information apparatus, which is characterized in that the device includes:

Determination unit, for determining just in busy channel；

Transmission unit includes that spatial reuse indicates information in the message for sending message by the channel；The receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or

Spatial reuse instruction information, which is used to indicate, to be listened to the non-reception node of the channel and indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, the non-reception node that the channel is listened in instruction occupies the channel after waiting the channel idle.
A kind of transmission information apparatus, which is characterized in that the device includes:

Receiving unit, for receiving the message of second node transmission, in the message that the second node is sent Information is indicated including spatial reuse；

Transmission unit, after spatial reuse instruction information in message for being sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and response message is sent to the second node by the channel.
A kind of transmission information apparatus, which is characterized in that the device includes:

Unit is listened to, includes that spatial reuse indicates information for listening to the message that third node is sent in channel, in the message that the third node is sent；

Determination unit occupies the channel after waiting the channel idle after the spatial reuse instruction information in the message for sending according to the third node determines the channel that the third node is occupied by spatial multiplexing mode.
A kind of Withdraw and keep-off device, which is characterized in that the device includes interface, processor, memory and transceiver:

Processor, for executing following process:

Start backoff counter；

It is occupied by second node by spatial multiplexing mode in the corresponding channel of backoff counter for determining starting, and after the channel cannot being occupied jointly by spatial multiplexing mode and second node, continue the count value for the backoff counter being counted or being reduced the backoff counter.
Device according to claim 27, which is characterized in that the processor is also used to:

Determine that there is no other neighbor nodes other than the second node in the first node signal cover；Alternatively,

Determine that there is no other neighbor nodes other than the receiving node of the second node, the first node in the first node signal cover.
According to the described in any item devices of claim 27 to 28, which is characterized in that the processor reduces the count value of the backoff counter and suspends the backoff counter.
According to the described in any item devices of claim 27 to 28, which is characterized in that the processor is specifically used for:

During the second node occupies the channel, the meter of the backoff counter is periodically reduced Numerical value.
According to the described in any item devices of claim 27 to 28, which is characterized in that the processing unit is specifically used for:

The current count value of the backoff counter multiplied by coefficient and is rounded, wherein the coefficient is greater than 0 and less than 1；

Using the count value current as the backoff counter of the numerical value after rounding.
According to the described in any item devices of claim 27 to 28, which is characterized in that the processor is specifically used for:

If the difference of the current count value of the backoff counter and threshold value is less than 0, by 0 count value current as the backoff counter；

If the difference of the current count value of the backoff counter and the threshold value is not less than 0, the current count value of the backoff counter is taked the difference as.
According to the described in any item devices of claim 27 to 28, which is characterized in that the processor judges whether the second node passes through spatial multiplexing mode and occupy the channel according to following manner:

The first message that the second node is sent to other nodes is listened to, includes that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that the second node occupies the channel in the first message；

Determine whether the second node passes through spatial multiplexing mode and occupy the channel according to the spatial reuse instruction information in the first message.
According to the described in any item devices of claim 27 to 34, which is characterized in that the processor is also used to:

After busy channel, second message is sent by the channel, wherein include that spatial reuse indicates that information, the spatial reuse instruction information are used to indicate the occupancy mode that first node occupies the channel in the second message.
Device according to claim 34, which is characterized in that the spatial reuse instruction information is located in the HE signaling HE-SIG of the message physical header.
According to the described in any item devices of claim 27 to 35, which is characterized in that the processing Device is also used to:

The third message that third node is sent is received, includes that spatial reuse indicates information in the third message；

After determining the channel that the third node is occupied by spatial multiplexing mode according to the spatial reuse instruction information in the third message, occupied after the channel through the channel by competitive way to third node transmission response message.
A kind of transmission information apparatus, which is characterized in that the device includes interface, processor, memory and transceiver:

Processor, for executing following process:

It determines just in busy channel；

Message is sent by the channel, includes that spatial reuse indicates information in the message；The receiving node that the spatial reuse instruction information is used to indicate the message indicates that information determines that first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, indicates that the receiving node of the message is occupied by competitive way and send response message to the first node after the channel；And/or

Spatial reuse instruction information, which is used to indicate, to be listened to the non-reception node of the channel and indicates that information determines that the first node occupies the occupancy mode of the channel according to the spatial reuse, and when the first node occupies the channel by spatial multiplexing mode, the non-reception node that the channel is listened in instruction occupies the channel after waiting the channel idle.
A kind of transmission information apparatus, which is characterized in that the device includes interface, processor, memory and transceiver:

Processor, for executing following process:

The message that second node is sent is received, includes that spatial reuse indicates information in the message that the second node is sent；

After spatial reuse instruction information in the message sent according to the second node determines the channel that the second node is occupied by spatial multiplexing mode, the channel is occupied by competitive way, and by the channel to second node transmission response message.
A kind of transmission information apparatus, which is characterized in that the device includes interface, processor, storage Device and transceiver:

Processor, for executing following process:

The message that third node is sent in channel is listened to, includes that spatial reuse indicates information in the message that the third node is sent；

After spatial reuse instruction information in the message sent according to the third node determines the channel that the third node is occupied by spatial multiplexing mode, the channel is occupied after waiting the channel idle.