CN106130860A - The MAC cut-in method of nonopiate multiple access self-organizing network - Google Patents
The MAC cut-in method of nonopiate multiple access self-organizing network Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/50—Queue scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/407—Bus networks with decentralised control
- H04L12/413—Bus networks with decentralised control with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
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Abstract
This application discloses the MAC cut-in method of a kind of nonopiate multiple access self-organizing network, the method includes: before the intended recipient node in same neighborhood of the target sending node in ad hoc networks sends RTS frame, if it is identical with intended recipient node to listen to the receiving node corresponding to other sending nodes, then start stationary window avoidance mechanism, the most then allow target sending node to send RTS frame to intended recipient node；If intended recipient node receives N number of RTS frame in preset time period, and it is intended recipient node when above-mentioned N number of RTS frame exists the receiving node corresponding to M RTS frame, then make intended recipient node reply CTS frame to the sending node corresponding to above-mentioned M RTS frame, then allow the sending node corresponding to above-mentioned M RTS frame to send Frame to intended recipient node simultaneously.The application achieves the function of transmitted in parallel data in nonopiate multiple access self-organizing network.
Description
Technical field
The present invention relates to communication technical field, the MAC particularly to a kind of nonopiate multiple access self-organizing network connects
Enter method.
Background technology
Currently, wireless network is normally based on FDMA (i.e. Frequency Division Multiple Access, frequency division
Multiple access), TDMA (i.e. Time Division Multiple Access, time division multiple acess), CDMA (i.e. Code Division
Multiple Access, CDMA) etc. orthogonal multiple access mode.In order to increase the spectrum utilization of network further
Efficiency, improves traffic rate and reduces delay, and person skilled proposed non-orthogonal multiple access technology (Non-in 2013
Orthogonal Multiple Access), the most nonopiate multiple access technology.This technology is the carrying out of receiving terminal
SIC process (SIC, i.e. Successive Interference Cancellation, counteracting serial interference), it is allowed at power domain
Carry out multiple access access, make multi-user to carry out data transmission with frequency simultaneously, have speed height, postpone low advantage, to improving frequency spectrum
Utilization rate is significant, has included the research category of new generation of wireless communication system including 5G in.Nonopiate multi-user
Access technology can be not only used for centrally controlled network, can be used for again Ad Hoc network (i.e. self-organizing network).In ad hoc networks,
The user that nonopiate multiple access technology can increase under limited resources connects number, makes the node in same neighborhood obtain bigger
Accessible bandwidth, supports the number of users that can dynamically change, and has performance robustness during mobile networking, particularly suitable
In the scene that magnanimity connects.
Cordless communication network needs suitable medium access control (media access control, be called for short MAC afterwards) layer
Agreement.The effect of mac-layer protocol is the access to channel of the coordination network node, makes multiple node share rationally, efficiently limited
Radio channel resource, it directly influences many performances such as the handling capacity of network, time delay, number of users, resource utilization.
Currently, self-organizing network based on nonopiate multiple access technology is generally selected CSMA/CA (carrier
Sense multiple access with collision avoidance) agreement as mac-layer protocol, but, current institute
Have and support that the CSMA/CA agreement that many bags receive the most does not supports the function of transmitted in parallel multichannel data in same communication proximity, so
Limit the communication efficiency of self-organizing network.
In sum it can be seen that how to realize parallel in self-organizing network based on nonopiate multiple access technology
The function sending data is current problem demanding prompt solution.
Summary of the invention
In view of this, the MAC that it is an object of the invention to provide a kind of nonopiate multiple access self-organizing network accesses
Method, achieves the function of transmitted in parallel data in self-organizing network based on nonopiate multiple access technology.It is concrete
Scheme is as follows:
The MAC cut-in method of a kind of nonopiate multiple access self-organizing network, is applied to connect based on nonopiate multi-user
Enter the self-organizing network that technology is built, including:
The target sending node in described self-organizing network intended recipient node in same neighborhood send RTS frame it
Before, the communication conditions of other sending nodes being currently located in described same neighborhood being intercepted, sending if listening to other
Receiving node corresponding to node is identical with described intended recipient node, then control described target sending node and start stationary window
Avoidance mechanism, after described stationary window avoidance mechanism terminates, then allows described target sending node to save to described intended recipient
Point sends RTS frame；
If described intended recipient node receives N number of RTS frame in preset time period, N is the integer more than 1, and works as
There is the receiving node corresponding to M RTS frame in described N number of RTS frame and be described intended recipient node, M be no more than N just
Integer, then make described intended recipient node reply CTS frame to the sending node corresponding to described M RTS frame；
When the sending node corresponding to described M RTS frame receives the CTS frame that described intended recipient node sends, then permit
Permitted the sending node corresponding to described M RTS frame and sent Frame to described intended recipient node simultaneously.
Preferably, the RTS frame that in described self-organizing network, arbitrary sending node is sent all includes Channel holding time, is somebody's turn to do
The address information of sending node, the address information of corresponding receiving node, it is used for indicating arbitrary receiving node receiving this RTS frame
Afterwards until the TR territory of required waiting time during this before this sending node reply CTS frame.
Preferably, the communication conditions of described other sending nodes to being currently located in described same neighborhood is intercepted
Process, including:
Obtain the RTS frame that other sending nodes being currently located in described same neighborhood outwardly send, extract this RTS frame
In the address information of receiving node carried, it is judged that the address information of this address information and described target sending node whether phase
With, if it is, judge that the receiving node corresponding to other sending nodes is identical with described intended recipient node, if it is not, then
Judge that the receiving node corresponding to other sending nodes is different from described intended recipient node.
Preferably, different, then from described intended recipient node if listening to the receiving node corresponding to other sending nodes
The NAV of self is set according to the Channel holding time in the RTS frame that described target sending node sends, subsequently into shape of mourning in silence
State.
Preferably, arbitrary receiving node receives the process of RTS frame, including:
When arbitrary receiving node is at first the RTS frame received in this communication cycle, start in this receiving node
The intervalometer in portion, wherein, the timing section corresponding to described intervalometer is identical with described preset time period, makes this receiving node
Other RTS frames that may arrive are continued waiting for, when described intervalometer overflows in the timing section corresponding to described intervalometer
After, control this receiving node and enter the transmission process of follow-up CTS frame.
Preferably, when the receiving node corresponding to described N number of RTS frame is described intended recipient node, then according to presetting
Sending node selection strategy, carries out at least one Screening Treatment taken turns, to determine to the sending node corresponding to described N number of RTS frame
Often take turns the sending node that can communicate with described intended recipient node, then often taking turns in communication process, making described target
The sending node that receiving node uses total power can communicate to epicycle replys CTS frame；
When the receiving node corresponding to described N number of RTS frame had both included described intended recipient node, include that again other receive joint
Point, then according to described default sending node selection strategy, carry out at least one to the sending node corresponding to described N number of RTS frame and take turns
Screening Treatment, to determine the sending node that often wheel can communicate with described intended recipient node, then often taking turns communication
During, according to default transmit power allocation strategy, make described intended recipient node according to different transmit powers to epicycle energy
The different sending node enough communicated replys CTS frame；
When the receiving node corresponding to described N number of RTS frame is not described intended recipient node, then take according in RTS frame
The Channel holding time of band arranges the NAV of self, subsequently into silent status；
Wherein, the CTS frame that in described self-organizing network, arbitrary receiving node is replied includes that this receiving node is being replied
The information of transmit power that used during this CTS frame, the address information of this receiving node, the address information of corresponding sending node.
Preferably, the Frame that arbitrary sending node is sent includes a power parameter territory, and wherein, described power is joined
Number field have recorded the Frame transmit power that this sending node is used when sending this Frame.
Preferably, when arbitrary receiving node is simultaneously received at least two Frame, then according to the power of each Frame
The size order of the Frame transmit power recorded in parameter field, the most successively to each data received
Frame carries out SIC process.
Preferably, described default sending node selection strategy is: only allowing to select to be currently located at can sending out on communication zone
Send node, forbid the sending node selecting to be positioned on interference region, and often taking turns in Screening Treatment, each can be on communication zone
Only allow to select a sending node, the optional sending node of at least two can be there is, then at this in communication zone if same
Optional all sending nodes can select in communication zone the sending node that data to be transmitted packet length is the longest；
Wherein, can communication zone be the region that signal propagation distance is positioned at each road signal propagation distance interval,
Interference region is that be positioned at can region outside communication zone.
Preferably, described MAC layer cut-in method, also include:
When a sending node needs to send RTS frame to the receiving node set comprising at least two receiving node, then press
According to default receiving node selection strategy, described receiving node set is carried out at least one Screening Treatment taken turns, often take turns energy to determine
The receiving node enough communicated；
Wherein, described default receiving node selection strategy is: only allowing to select to be currently located at can reception on communication zone
Node, forbids selecting to be positioned at the receiving node of interference region, and is often taking turns in Screening Treatment, each only can permit on communication zone
Permitted to select a receiving node, the optional receiving node of at least two can be there is in communication zone if same, then can lead at this
Optional all receiving nodes select in letter region the receiving node that data packet length to be received is the longest.
In the present invention, MAC layer cut-in method is applied to the self-organizing network built based on nonopiate multiple access technology,
Including: before the intended recipient node in same neighborhood of the target sending node in ad hoc networks sends RTS frame, to working as
The communication conditions of the anteposition other sending nodes in same neighborhood is intercepted, if listening to corresponding to other sending nodes
Receiving node is identical with intended recipient node, then control target sending node and start stationary window avoidance mechanism, work as stationary window
After avoidance mechanism terminates, then target sending node is allowed to send RTS frame to intended recipient node；If intended recipient node is being preset
Receiving N number of RTS frame in time period, N is the integer more than 1, and when above-mentioned N number of RTS frame exists corresponding to M RTS frame
Receiving node be intended recipient node, M is the positive integer of no more than N, then make intended recipient node to above-mentioned M RTS frame
Corresponding sending node replys CTS frame；Send out when the sending node corresponding to above-mentioned M RTS frame receives intended recipient node
The CTS frame sent, then allow the sending node corresponding to above-mentioned M RTS frame to send Frame to intended recipient node simultaneously.
Visible, in the present invention, target sending node is sending between RTS frame to certain receiving node, first sends this target
Other sending nodes in the communication proximity of node place are intercepted, if intercepted result finds that this target sending node is with same
In neighborhood, the receiving node corresponding to other sending nodes is all consistent, then in order to avoid there are the feelings that multiple RTS frames collide
Condition, this invention takes and control the mode of above-mentioned target sending node startup stationary window avoidance mechanism to reach collision free
Purpose, on the basis of this, the intended recipient node in the self-organizing network of the present invention just can receive in preset time period
, without there is the situation of RTS frame collision, as all RTS that intended recipient node receives in two or more RTS frames
Frame exists the receiving node corresponding to multiple RTS frame and is this intended recipient node, then make this intended recipient node to upper
State sending node corresponding to multiple RTS frame and reply CTS frame, intended recipient node and above-mentioned multiple RTS frames pair can be set up with this
A plurality of data link between the sending node answered, subsequently through above-mentioned a plurality of data link, can allow corresponding multiple transmission
Node sends Frame to above-mentioned intended recipient node simultaneously, thus at self-organization network based on nonopiate multiple access technology
Network achieves the function of transmitted in parallel data.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
Fig. 1 is the MAC cut-in method stream of a kind of nonopiate multiple access self-organizing network disclosed in the embodiment of the present invention
Cheng Tu.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the invention discloses the MAC cut-in method of a kind of nonopiate multiple access self-organizing network, be applied to
The self-organizing network built based on nonopiate multiple access technology, shown in Figure 1, the method includes:
Step S11: the intended recipient node in same neighborhood of the target sending node in ad hoc networks sends RTS
Before frame, the communication conditions of other sending nodes being currently located in same neighborhood is intercepted.
It should be noted that in the present embodiment, in above-mentioned self-organizing network, sending node S (arbitrary sending node) is to connecing
Receive node R (arbitrary receiving node) to send before Frame, need between sending node S and receiving node R by RTS frame and
CTS frame carries out channel booking, thus builds the data link between sending node S and receiving node R.Only at sending node
After data link between S and receiving node R is built, sending node S can send Frame to receiving node R.
In addition, it is necessary to further illustrate, in the present embodiment, sending node S is after receiving node R sends RTS frame, no
Only receiving node R can receive the RTS frame that sending node S is sent, and is positioned at communication proximity residing for sending node S other
Send node and receiving node also can receive the RTS frame that sending node S is sent.
Step S12: if it is identical with intended recipient node to listen to the receiving node corresponding to other sending nodes, then control
Target sending node starts stationary window avoidance mechanism.
It should be noted that in above-mentioned steps S12, the receiving node corresponding to sending node refers to that this sending node is intended
Carry out the receiving node of Frame transfer operation therewith.If that is, sending node S intends to be sent to Frame receiving node R,
So this receiving node R is the receiving node corresponding to sending node S.Although the RTS frame that sending node S is sent can not only
Enough received by receiving node R, it is also possible to received by other sending nodes and other receiving nodes, but above-mentioned other receive
Node is not the receiving node corresponding to sending node S of the present embodiment indication.
It addition, above-mentioned stationary window avoidance mechanism refers to use the avoidance mechanism of the competition window with fixed size.This
In embodiment, the big I of the competition window employed in stationary window avoidance mechanism is determined by empirical value, does not limits at this
Fixed.
In the present embodiment, identical with intended recipient node when listening to the receiving node corresponding to other sending nodes, then
Control target sending node start stationary window avoidance mechanism, so it can be avoided that while or mail to same in shorter time period
The situation of multiple RTS frame generation frame collisions of receiving node.
Step S13: after stationary window avoidance mechanism terminates, then allow target sending node to send to intended recipient node
RTS frame.
Step S14: if intended recipient node receives N number of RTS frame in preset time period, N is the integer more than 1, and
And be intended recipient node when above-mentioned N number of RTS frame exists the receiving node corresponding to M RTS frame, M be no more than N just
Integer, then make intended recipient node reply CTS frame to the sending node corresponding to above-mentioned M RTS frame.
It should be noted that above-mentioned preset time period can carry out concrete value based on reality application needs, the most right at this
It specifically limits.It addition, in the present embodiment, the receiving node corresponding to arbitrary RTS frame refers to send the transmission of this RTS frame
Receiving node corresponding to node.
In the present embodiment, above-mentioned intended recipient node is replied after CTS frame to the sending node corresponding to above-mentioned M RTS frame,
The information between CTS frame and RTS frame that will this completes is mutual, thus has built above-mentioned intended recipient node and above-mentioned M
The data link between sending node corresponding to RTS frame.
Step S15: when the sending node corresponding to above-mentioned M RTS frame receives the CTS frame that intended recipient node sends,
Then allow the sending node corresponding to above-mentioned M RTS frame to send Frame to intended recipient node simultaneously.
It should be noted that in the present embodiment, the sending node corresponding to arbitrary RTS frame refers to send sending out of this RTS frame
Send node.
After the sending node corresponding to above-mentioned M RTS frame receives the CTS frame that intended recipient node sends, it will take
Build the data link between the sending node corresponding to above-mentioned intended recipient node and above-mentioned M RTS frame, by these Data-Links
Road, the sending node corresponding to above-mentioned M RTS frame just can send Frame to intended recipient node, thus based on non-simultaneously
The self-organizing network of orthogonal multiple access technology achieves the function of transmitted in parallel data.
Visible, in the embodiment of the present invention, target sending node is sending between RTS frame to certain receiving node, first to this mesh
Other sending nodes in the communication proximity of mark sending node place are intercepted, if intercepted result finds this target sending node
The most consistent with the receiving node corresponding to other sending nodes in same neighborhood, then in order to avoid occurring that multiple RTS frames touch
Situation about hitting, the embodiment of the present invention takes the mode of control above-mentioned target sending node startup stationary window avoidance mechanism and reaches
To the purpose of collision free, on the basis of this, the intended recipient node in the self-organizing network of the embodiment of the present invention just can be
Receive two or more RTS frame in preset time period, without the situation of RTS frame collision occurs, work as intended recipient
There is the receiving node corresponding to multiple RTS frame in all RTS frames that node receives and be this intended recipient node, then order should
Intended recipient node replys CTS frame to the sending node corresponding with above-mentioned multiple RTS frames, can set up intended recipient node with this
A plurality of data link sending node between corresponding with above-mentioned multiple RTS frames is subsequently through above-mentioned a plurality of data link, permissible
Allow corresponding multiple sending node send Frame to above-mentioned intended recipient node simultaneously, thus connecing based on nonopiate multi-user
Enter the function achieving transmitted in parallel data in the self-organizing network of technology.
The embodiment of the invention discloses the MAC cut-in method of a kind of concrete nonopiate multiple access self-organizing network,
Relative to a upper embodiment, technical scheme has been made further instruction and optimization by the present embodiment.Concrete:
Owing to the CSMA/CA agreement in the present invention supports that a plurality of data link carries out parallel data frame transmission, therefore with biography
System CSMA/CA agreement compare, current embodiment require that the form to RTS frame expands, such as need increase sending node and
The address information of receiving node, and increase TR territory, can notify that the node receiving RTS frame is by needs by the TR territory increased
Wait how long CTS frame is replied by side.
Concrete, the RTS frame that in the self-organizing network of the present embodiment, arbitrary sending node is sent all includes channel occupancy
Time, the address information of this sending node, the address information of corresponding receiving node, it is used for indicating arbitrary receiving node receiving
Until the TR territory of required waiting time during this before this sending node reply CTS frame after this RTS frame.The present embodiment
In, the address information of above-mentioned corresponding receiving node refers to that above-mentioned sending node intends to carry out therewith the reception of Frame transfer operation
Address of node information.
It addition, in upper embodiment step S11, the communication conditions to other sending nodes being currently located in same neighborhood
Carry out the process intercepted, specifically include: obtain the RTS that other sending nodes being currently located in same neighborhood outwardly send
Frame, extracts the address information of the receiving node carried in this RTS frame, it is judged that the address letter of this address information and target sending node
Cease the most identical, if it is, judge that the receiving node corresponding to other sending nodes is identical with intended recipient node, if
No, then judge that the receiving node corresponding to other sending nodes is different from intended recipient node.
In the present embodiment, if it is different from intended recipient node, then to listen to the receiving node corresponding to other sending nodes
The NAV of self is set according to the Channel holding time in the RTS frame that target sending node sends, subsequently into silent status.
In the present embodiment, arbitrary receiving node receives the process of RTS frame, specifically includes:
When arbitrary receiving node is at first the RTS frame received in this communication cycle, start in this receiving node
The intervalometer in portion, wherein, the timing section corresponding to intervalometer and the preset time period phase in upper embodiment step S14
With, make this receiving node continue waiting for other RTS frames that may arrive in the timing section corresponding to intervalometer, when timing
After device overflows, control this receiving node and enter the transmission process of follow-up CTS frame.That is, when arbitrary receiving node communicates at this
After receiving first RTS frame in cycle, do not immediately enter the Recovery Process of CTS frame, and be to continue with in a period of time
Wait other RTS frames that may arrive.It is understood that time span corresponding to this above-mentioned communication cycle should be not less than
The time span of above-mentioned timing section.
More specifically, it is intended recipient node, then when the receiving node corresponding to the N number of RTS frame in a upper embodiment
According to default sending node selection strategy, the sending node corresponding to above-mentioned N number of RTS frame is carried out at least one screening taken turns
Reason, to determine the sending node that often wheel can communicate with intended recipient node, is then often taking turns in communication process, is making target
The sending node that receiving node uses total power can communicate to epicycle replys CTS frame.
It addition, when the receiving node corresponding to above-mentioned N number of RTS frame had both included intended recipient node, include that again other receive
Node, then according to default sending node selection strategy, carry out at least one and take turns the sending node corresponding to above-mentioned N number of RTS frame
Screening Treatment, to determine the sending node that often wheel can communicate with intended recipient node, is then often taking turns in communication process,
According to default transmit power allocation strategy, make intended recipient node can communicate to epicycle according to different transmit powers
Different sending nodes replys CTS frame.It is understood that when the not sending node in corresponding relation with intended recipient node
After receiving the CTS frame of intended recipient node reverts back, this sending node will directly ignore this CTS frame, and can't set up and mesh
Data link between mark receiving node.
It is understood that above-mentioned default transmit power allocation strategy defines as different sending node distribution different
CTS frame transmit power, intended recipient node is when replying CTS frame to a certain sending node, with corresponding transmit power to this
Send node reverts back CTS frame.
Secondly, when the receiving node corresponding to above-mentioned N number of RTS frame is not intended recipient node, then take according in RTS frame
The Channel holding time of band arranges the NAV of self, subsequently into silent status.
Wherein, the CTS frame that in self-organizing network, arbitrary receiving node is replied includes that this receiving node is replying this CTS
The information of the transmit power used during frame, the address information of this receiving node, the address information of corresponding sending node.
In the present embodiment, be currently located at can the comunication area particularly as follows: only allow selection for above-mentioned default sending node selection strategy
Sending node on territory, forbids the sending node selecting to be positioned on interference region, and is often taking turns in Screening Treatment, each leads to
Only allow on letter region to select a sending node, at least two can be there is in communication zone optionally send joint if same
Point, then can select, at this, the sending node that data to be transmitted packet length is the longest in communication zone in optional all sending nodes；
Wherein, can communication zone be the region that signal propagation distance is positioned at each road signal propagation distance interval,
Interference region is that be positioned at can region outside communication zone.
In the present embodiment, the Frame that arbitrary sending node is sent includes a power parameter territory, and wherein, power is joined
Number field have recorded the Frame transmit power that this sending node is used when sending this Frame.
In the present embodiment, when arbitrary receiving node is simultaneously received at least two Frame, then according to each Frame
The size order of the Frame transmit power recorded in power parameter territory, receives each the most successively
Frame carries out SIC process.That is, first the Frame that Frame transmit power is maximum is carried out SIC process, then to Frame
The second largest Frame of transmit power carries out SIC process, by that analogy, until entering the Frame that Frame transmit power is minimum
Row SIC process.
It addition, the MAC layer cut-in method in the present embodiment, it is also possible to farther include:
When a sending node needs to send RTS frame to the receiving node set comprising at least two receiving node, then press
According to default receiving node selection strategy, carry out at least one Screening Treatment taken turns to receiving node set, to determine that often wheel can enter
The receiving node of row communication；
Wherein, above-mentioned default receiving node selection strategy is: only allowing to select to be currently located at can reception on communication zone
Node, forbids selecting to be positioned at the receiving node of interference region, and is often taking turns in Screening Treatment, each only can permit on communication zone
Permitted to select a receiving node, the optional receiving node of at least two can be there is in communication zone if same, then can lead at this
Optional all receiving nodes select in letter region the receiving node that data packet length to be received is the longest.
Finally, in addition it is also necessary to explanation, in this article, term " includes ", " comprising " or its any other variant are intended to
Contain comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include those
Key element, but also include other key elements being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that
Other identical element is there is also in including the process of described key element, method, article or equipment.
Above the MAC cut-in method of a kind of nonopiate multiple access self-organizing network provided by the present invention is carried out
Being discussed in detail, principle and the embodiment of the present invention are set forth by specific case used herein, above example
Method and the core concept thereof being only intended to help to understand the present invention is described；Simultaneously for one of ordinary skill in the art, depend on
According to the thought of the present invention, the most all will change, in sum, this specification content
Should not be construed as limitation of the present invention.
Claims (10)
1. the MAC cut-in method of a nonopiate multiple access self-organizing network, it is characterised in that be applied to based on nonopiate
The self-organizing network that multiple access technology is built, including:
Before the target sending node in described self-organizing network intended recipient node in same neighborhood sends RTS frame,
The communication conditions of other sending nodes being currently located in described same neighborhood is intercepted, if listening to other sending nodes
Corresponding receiving node is identical with described intended recipient node, then control described target sending node startup stationary window and keep out of the way
Mechanism, after described stationary window avoidance mechanism terminates, then allows described target sending node to send out to described intended recipient node
Send RTS frame；
If described intended recipient node receives N number of RTS frame in preset time period, N is the integer more than 1, and as described N
There is the receiving node corresponding to M RTS frame in individual RTS frame and be described intended recipient node, M is the positive integer of no more than N,
Described intended recipient node is then made to reply CTS frame to the sending node corresponding to described M RTS frame；
When the sending node corresponding to described M RTS frame receives the CTS frame that described intended recipient node sends, then allow institute
State the sending node corresponding to M RTS frame and send Frame to described intended recipient node simultaneously.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 1, it is characterised in that
The RTS frame that in described self-organizing network, arbitrary sending node is sent all includes the address of Channel holding time, this sending node
Information, the address information of corresponding receiving node, it is used for indicating arbitrary receiving node after receiving this RTS frame until to this transmission
The TR territory of required waiting time during this before node reverts back CTS frame.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 2, it is characterised in that
The process that the communication conditions of described other sending nodes to being currently located in described same neighborhood is intercepted, including:
Obtain the RTS frame that other sending nodes being currently located in described same neighborhood outwardly send, extract in this RTS frame and take
The address information of the receiving node of band, it is judged that this address information is the most identical with the address information of described target sending node, as
Fruit is then to judge that the receiving node corresponding to other sending nodes is identical with described intended recipient node, if it is not, then judge it
Receiving node corresponding to his sending node is different from described intended recipient node.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 3, it is characterised in that
If it is different from described intended recipient node to listen to the receiving node corresponding to other sending nodes, then send according to described target
Channel holding time in the RTS frame that node sends arranges the NAV of self, subsequently into silent status.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 4, it is characterised in that
Arbitrary receiving node receives the process of RTS frame, including:
When arbitrary receiving node is at first the RTS frame received in this communication cycle, start within this receiving node
Intervalometer, wherein, the timing section corresponding to described intervalometer is identical with described preset time period, makes this receiving node in institute
Other RTS frames that may arrive, after described intervalometer overflows, control is continued waiting in stating the timing section corresponding to intervalometer
Make this receiving node and enter the transmission process of follow-up CTS frame.
6. according to the MAC cut-in method of the nonopiate multiple access self-organizing network described in any one of claim 1 to 5, its
It is characterised by,
When the receiving node corresponding to described N number of RTS frame is described intended recipient node, then select according to default sending node
Strategy, carries out at least one Screening Treatment taken turns to the sending node corresponding to described N number of RTS frame, to determine that often wheel can be with institute
State the sending node that intended recipient node communicates, then often taking turns in communication process, make described intended recipient node use
The sending node that total power can communicate to epicycle replys CTS frame；
When the receiving node corresponding to described N number of RTS frame had both included described intended recipient node, include again other receiving nodes,
Then according to described default sending node selection strategy, the sending node corresponding to described N number of RTS frame is carried out at least one sieve taken turns
Choosing processes, and to determine the sending node that often wheel can communicate with described intended recipient node, is then often taking turns communication process
In, according to default transmit power allocation strategy, make described intended recipient node can enter to epicycle according to different transmit powers
The different sending node of row communication replys CTS frame；
When the receiving node corresponding to described N number of RTS frame is not described intended recipient node, then according to RTS frame carries
Channel holding time arranges the NAV of self, subsequently into silent status；
Wherein, the CTS frame that in described self-organizing network, arbitrary receiving node is replied includes that this receiving node is replying this CTS
The information of the transmit power used during frame, the address information of this receiving node, the address information of corresponding sending node.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 6, it is characterised in that
The Frame that arbitrary sending node is sent includes a power parameter territory, wherein, have recorded this in described power parameter territory
The Frame transmit power that sending node is used when sending this Frame.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 7, it is characterised in that
When arbitrary receiving node is simultaneously received at least two Frame, then recorded in the power parameter territory according to each Frame
The size order of Frame transmit power, carries out SIC process to each Frame received the most successively.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 6, it is characterised in that
Described default sending node selection strategy is: only allow to select to be currently located at can sending node on communication zone, forbid selecting
The sending node being positioned on interference region, and often taking turns in Screening Treatment, each can only allow to select one on communication zone
Sending node, if the same optional sending node of at least two that can exist in communication zone, then can in communication zone at this
All sending nodes of choosing select the sending node that data to be transmitted packet length is the longest；
Wherein, can communication zone be the region that signal propagation distance is positioned at each road signal propagation distance interval, interference
Region is that be positioned at can region outside communication zone.
The MAC cut-in method of nonopiate multiple access self-organizing network the most according to claim 9, it is characterised in that
Also include:
When a sending node needs to send RTS frame, then according in advance to the receiving node set comprising at least two receiving node
If receiving node selection strategy, described receiving node set is carried out at least one Screening Treatment taken turns, to determine that often wheel can enter
The receiving node of row communication；
Wherein, described default receiving node selection strategy is: only allow to select to be currently located at can receiving node on communication zone,
Forbid selecting to be positioned at the receiving node of interference region, and often taking turns in Screening Treatment, each can only allow choosing on communication zone
Select a receiving node, the optional receiving node of at least two can be there is in communication zone if same, then can the comunication area at this
Optional all receiving nodes select in territory the receiving node that data packet length to be received is the longest.
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