CN110035470A - A kind of node device for realizing directional data access in multinode wireless transmitting system - Google Patents
A kind of node device for realizing directional data access in multinode wireless transmitting system Download PDFInfo
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- CN110035470A CN110035470A CN201910228046.1A CN201910228046A CN110035470A CN 110035470 A CN110035470 A CN 110035470A CN 201910228046 A CN201910228046 A CN 201910228046A CN 110035470 A CN110035470 A CN 110035470A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
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Abstract
The present invention relates to Internet of Things technical field of RFID, disclose a kind of node device that directional data access is realized in multinode wireless transmitting system.It can be after wireless receiving to data access request message/and data access response message, message transmission link preset in advance/and next forwarding target are known from message, make message forwarding process that there is directive property, through destination, so as to largely reduce in the wireless transmission message for eating dishes without rice or wine to occur, message transition collision rate and packet loss are substantially reduced, realize quickly access and saves the purpose of channel resource.In addition, the node device also has many advantages, such as that message can confirm, transmission link can switch and can carry out closing rule to transport protocol stack for forwarding, be convenient for practical application and popularization halfway.
Description
Technical field
The invention belongs to Internet of Things technical field of RFID, and in particular to one kind is real in multinode wireless transmitting system
The node device of existing directional data access.
Background technique
Radio frequency identification, RFID (Radio Frequency Identification) technology, also known as radio frequency identification are
A kind of communication technology, is commonly called as electronic tag, and specific objective can be identified by radio signals and reads and writes related data.Current RFID
Technology has been widely used in every field, for example, sale of goods, transport, production, waste management, postal tracking, aviation row
The fields such as Li Guanli, vehicle toll management, traditional paper tape bar code because its storage capacity is small, cannot rewrite the disadvantages of, knowing
Other field, is slowly substituted by RFID system.
One complete RFID of Internet-of-things system is by PC equipment, centralized manager, repeater, label base station and active mark
The multinode wireless transmitting system that the hardware devices such as label are constituted, wherein the active label is for realizing sensing data acquisition etc.
On the one hand purpose, the label base station are used to communicate with active label, interaction or collection sensing data, on the other hand for that will pass
Sense data directly transmit or send PC equipment to by the repeater and the centralized manager transfer.All due to these equipment
Be be wirelessly transferred on close channel or same channel, if PC equipment to access it is on some active label, some mark
Sensing data on base station or in centralized manager is signed, data access request can be carried out by a plurality of different transmission link
And response.But at present for as the centralized manager of intermediary device, repeater and/or label base station, not
This is known using that transmission link, is all who receives and just forward data access request and response whom, until arriving at the destination, such as
This will eat dishes without rice or wine to occur largely being wirelessly transferred message, can not only make message transition collision rate and packet loss high, delay passes
The defeated time also results in channel resource and a large amount of wastes occurs.
Summary of the invention
It existing message transition collision rate and is lost to solve existing multinode wireless transmitting system during data access
The problems such as packet rate is high, transmission time is easily delayed and wastes channel resource, it is an object of that present invention to provide one kind in more piece
The node device of directional data access is realized in point wireless transmitting system.
The technical scheme adopted by the invention is as follows:
A kind of node device for realizing directional data access in multinode wireless transmitting system, including the first acquisition are single
Member, the first judging unit, second judgment unit, the first execution unit and the second execution unit；
The first acquisition unit, for obtaining the data access after wireless receiving to data access request message
Downlink in request message sends address, downlink reception address and downlink transfer link and indicates information, wherein the downlink passes
Transmission link instruction packet contains the link sum that numerical value is M, the current ink number that numerical value is N and M-N basis from the near to the distant
The device address that sequence is set gradually, M are nonnegative integer, and N is the nonnegative integer no more than M；
First judging unit, communicates to connect the first acquisition unit, for judging that the downlink reception address is
No and local device address matching deletes the data access request message if mismatching, and otherwise starts second judgement
Unit；
The second judgment unit communicates to connect first judging unit, for judging that the downlink transfer link refers to
Whether the difference for showing link sum and current ink number in information is 0, if then starting first execution unit, is otherwise started
Second execution unit；
First execution unit, communicates to connect the second judgment unit, for determining local device for access target
Equipment generates data access response message corresponding with the data access request message, and sends address according to the downlink
The data access response message is sent to the node device feedback for sending the data access request message；
Second execution unit, communicates to connect the second judgment unit, for determining local device for intermediate node
Equipment, according to the first device address in downlink transfer link instruction information to next node device wireless forwarding institute
Data access request message is stated, while is updated as follows in the downlink transfer chain being forwarded in data access request message
Road indicates information: setting current ink number is N+1, is rejected according to the first device address sequentially set gradually from the near to the distant.
Optimization, further include the first forwarding confirmation unit, for not receiving for being forwarded data access request on schedule
When the reception confirmation message of message, then retransmission failure is determined, then retransmit the data access request message being forwarded, directly
Hop count to data access request message reaches max-forwards number.
It advanced optimizes, further includes the first transmission link selecting unit and third execution unit；
The first transmission link selecting unit, for reaching max-forwards in the hop count of data access request message
When number, one is randomly choosed from local downlink transfer link table from local device to the spare biography of the downlink of access target equipment
Then transmission link starts the third execution unit, wherein the access target equipment is that the corresponding downlink transfer link refers to
Show that the node device of last bit device address in information, the downlink standby transport link include K according to sequence from the near to the distant
The device address set gradually；
The third execution unit communicates to connect the first transmission link selecting unit, for according in the downlink
First device address in standby transport link is to data access request message described in next node device wireless forwarding, simultaneously
It updates as follows and indicates information in the downlink transfer link being forwarded in data access request message: setting link sum
For N+K, replaced originally with the downlink standby transport link according to all devices address sequentially set gradually from the near to the distant.
Optimization, further include the third judgement list between the first acquisition unit and first judging unit
Member, for judge the downlink send address whether with one of upstream plant address matching in local repeated link table,
The data access request message is deleted if mismatching, and otherwise starts first judging unit.
Optimization, the first acquisition unit is also used to obtain the downlink transfer link in the data access request message
Record information, wherein the current chain that the downlink transfer link record packet contains the link sum that numerical value is M, numerical value is N
The device address that number and N number of basis are sequentially set gradually from the near to the distant；
First execution unit is also used to when generating the data access response message, by the downlink transfer chain
Road records information and is added in the data access response message as uplink link instruction information；
Second execution unit is also used to be updated as follows in the case where being forwarded in data access request message
Row transmission link records information: setting current ink number is N+1, according to the first equipment sequentially set gradually from the near to the distant
The downlink is added before location sends address.
It advanced optimizes, further includes second acquisition unit, the 4th judging unit, the 5th judging unit, the 4th executes list
Member and the 5th execution unit；
The second acquisition unit, for obtaining the data access after wireless receiving to data access response message
Uplink in response message sends address, uplink receiving address and uplink link and indicates information, wherein the uplink passes
Transmission link instruction packet contains the link sum that numerical value is X, the current ink number that numerical value is Y and X-Y basis from the near to the distant
The device address that sequence is set gradually, X are nonnegative integer, and Y is the nonnegative integer no more than X；
4th judging unit, communicates to connect the second acquisition unit, for judging that the uplink receiving address is
No and local device address matching deletes the data access response message if mismatching, and otherwise starts the 5th judgement
Unit；
5th judging unit communicates to connect the 4th judging unit, for judging that the uplink link refers to
Whether the difference for showing link sum and current ink number in information is 0, if then starting the 4th execution unit, is otherwise started
5th execution unit；
4th execution unit communicates to connect the 5th judging unit, for determining local device for access starting
Equipment saves and/or shows the data access response message；
5th execution unit communicates to connect the 5th judging unit, for determining local device for intermediate node
Equipment, according to the first device address in uplink link instruction information to next node device wireless forwarding institute
Data access response message is stated, while is updated as follows in the uplink chain being forwarded in data access response message
Road indicates information: setting current ink number is Y+1, is rejected according to the first device address sequentially set gradually from the near to the distant.
Optimize in detail, further include the second forwarding confirmation unit, for not receiving for being forwarded data access on schedule
When the reception confirmation message of response message, then retransmission failure is determined, then retransmit the data access request being forwarded and disappear
Breath, until the hop count of data access response message reaches max-forwards number.
Further optimize in detail, further includes the second transmission link selecting unit and the 6th execution unit；
The second transmission link selecting unit, for reaching max-forwards in the hop count of data access response message
When number, one is randomly choosed from local downlink transfer link table from local device to the spare biography of uplink of access initial plant
Then transmission link starts the 6th execution unit, wherein the access initial plant is that the corresponding uplink link refers to
Show that the node device of last bit device address in information, the uplink standby transport link include Z according to sequence from the near to the distant
The device address set gradually；
6th execution unit communicates to connect the second transmission link selecting unit, for according in the uplink
First device address in standby transport link is to data access response message described in next node device wireless forwarding, simultaneously
It updates as follows and indicates information in the downlink transfer link being forwarded in data access response message: setting link sum
For Y+Z, replaced originally with the uplink standby transport link according to all devices address sequentially set gradually from the near to the distant.
Optimize in detail, further includes the 6th judgement between the second acquisition unit and the 4th judging unit
Unit, for judge the uplink send address whether with one of downstream plant address in local repeated link table
Match, the data access response message is deleted if mismatching, otherwise starts the 4th judging unit.
Specifically, the access initial plant is PC equipment, the intermediary device includes centralized manager, repeater
And/or label base station, the access target equipment are active label, label base station or centralized manager.
The invention has the benefit that
(1) the invention provides a kind of node that directional data access can be realized in multinode wireless transmitting system
Equipment can be known in advance after wireless receiving to data access request message/and data access response message from message
Preset message transmission link/and next forwarding target make message forwarding process have directive property, destination of going directly, thus
It can largely reduce in the wireless transmission message for eating dishes without rice or wine to occur, substantially reduce message transition collision rate and packet loss, realize quickly access
With the purpose for saving channel resource；
(2) node device also have forwarding message can confirm, transmission link can switch halfway and can to transmission assist
View stack carries out the advantages that closing rule, is convenient for practical application and popularization.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the method flow signal provided by the invention that directional data access is realized in multinode wireless transmitting system
Figure.
Fig. 2 is the message structure schematic diagram of downlink transfer link instruction information provided by the invention.
Fig. 3 is the message structure schematic diagram of downlink transfer link record information provided by the invention.
Fig. 4 is the node device structure provided by the invention that directional data access is realized in multinode wireless transmitting system
Schematic diagram.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further elaborated.It should be noted that for this
The explanation of a little way of example is used to help understand the present invention, but and does not constitute a limitation of the invention.It is disclosed herein specific
Structure and function details is only used for description example embodiments of the present invention.However, this hair can be embodied with many alternative forms
It is bright, and be not construed as limiting the invention in embodiment set forth herein.
It will be appreciated that though term first, second etc. can be used herein to describe various units, these units are not answered
When being limited by these terms.These terms are only used to distinguish a unit and another unit.Such as it can be single by first
Member is referred to as second unit, and similarly second unit can be referred to as first unit, real without departing from example of the invention
Apply the range of example.
It should be appreciated that the terms "and/or", only a kind of incidence relation for describing affiliated partner, expression can be with
There are three kinds of relationships, for example, A and/or B, can indicate: individualism A, individualism B exist simultaneously tri- kinds of situations of A and B,
The terms "/and " are to describe another affiliated partner relationship, indicate may exist two kinds of relationships, can be with for example, A/ and B
Indicate: two kinds of situations of individualism A, individualism A and B, in addition, character "/" herein, typicallying represent forward-backward correlation object is
A kind of "or" relationship.
It should be appreciated that when by unit referred to as with another unit " connection ", " connected " or " coupling " when, it can with it is another
A unit is directly connected or couples or temporary location may exist.Relatively, it is referred to as with another unit " directly when by unit
It is connected " or when " direct-coupling ", temporary location is not present.It should explain in a similar manner for describing the relationship between unit
Other words (for example, " ... between " to " between directly existing ... ", " adjacent " is to " direct neighbor " etc.).
Terms used herein are only used for description specific embodiment, and are not intended to limitation example embodiments of the present invention.
As it is used herein, singular "a", "an" and "the" is intended to include plural form, unless context is explicitly indicated
Contrary.It should also be understood that term " includes ", " including ", "comprising", and/or " containing " are as used herein,
Specified stated feature, integer, step, operation, unit and/or component existence, and be not excluded for it is one or more its
His feature, quantity, step, operation, unit, component and/or their combination existence or increase.
It will be further noted that the function action occurred may be with the sequence of attached drawing appearance in some alternative embodiments
It is different.Such as it depends on substantially being executed concurrently in related function action, or sometimes can be with
Opposite sequence executes continuously show two figures.
Specific details is provided, in the following description in order to which example embodiment is understood completely.However ability
Domain those of ordinary skill is it is to be understood that implementation example embodiment without these specific details.Such as it can be
System is shown in block diagram, to avoid with unnecessary details come so that example is unclear.It in other instances, can not be with need not
The details wanted shows well-known process, structure and technology, to avoid making example embodiment unclear.
Embodiment one
As shown in Figures 1 to 3, the realization directional data access in multinode wireless transmitting system provided in this embodiment
Method, i.e. node device can be, but not limited to include the following steps after wireless receiving to data access request message.
S101. it obtains the downlink in the data access request message and sends address, downlink reception address and downlink biography
Transmission link indicates information, wherein the downlink transfer link instruction packet contains the link sum that numerical value is M, numerical value is N's
The device address that current ink number and M-N basis are sequentially set gradually from the near to the distant, M are nonnegative integer, and N is no more than M's
Nonnegative integer.
In the step S101, the data access request message is to be directly transmitted by access initial plant or by centre
The message of node device forwarding, wherein the downlink sends the sender that address is used to indicate the data access request message
Identity, the downlink reception address are used to indicate recipient's identity of the data access request message.The downlink transfer chain
Road instruction information be used to indicate by access initial plant or recommended in advance by intermediary device and from message recipient to visit
Ask the node device that target device direction successively forwards the data access request message, wherein link sum is pre- for marking
Estimate the sum of intermediary device, current ink number is used to mark message recipient is which intermediary device estimated,
The node device of first device address is next forwarding target in the corresponding downlink transfer link instruction information, successively class
It pushes away, the node device of last bit device address is access target equipment in the corresponding downlink transfer link instruction information.In addition,
If the multinode wireless transmitting system be a complete RFID of Internet-of-things system, the access initial plant can specifically but
It is not limited to PC equipment, the intermediary device can be particularly but not limited to include centralized manager, repeater and/or label base
It stands, the access target equipment can be particularly but not limited to as active label, label base station or centralized manager etc..
S102. judge the downlink reception address whether with local device address matching, if mismatch if delete the number
It is no to then follow the steps S103 according to access request message.
Further include following steps before the step S102: judge the downlink send address whether with local relaying
One of upstream plant address matching in link table, deletes the data access request message, otherwise if mismatching
Execute step S102.The repeated link table is for the preset upstream node equipment for permitting to be communicated with local device, to keep away
Exempt to receive message of the processing from non-preset node device, such as repeater, uplink node device is predisposed to it
Its repeater or centralized manager directly delete and disappear if directly receiving the data access request message from PC equipment
Breath refuses subsequent processing, realizes the purpose for close to transport protocol stack rule.
Whether the difference for S103. judging link sum and current ink number in the downlink transfer link instruction information is 0,
It is no to then follow the steps S105 if so then execute step S104.
S104. determine that local device is access target equipment, generates data corresponding with the data access request message
Access response message, and address is sent according to the downlink and feeds back hair to the node device for sending the data access request message
Send the data access response message.
In the step S104, since the difference of link sum and current ink number is 0, then in the downlink transfer link
There is no next forwarding target in instruction information, therefore local device is access target equipment, it can be according to the data access
Request message generates corresponding data access response message, such as when requesting access to sensing data, sensing data is packaged in
In the data access response message, and give uplink feedback.
S105. determine that local device is intermediary device, according to the head in downlink transfer link instruction information
A device address updates as follows to data access request message described in next node device wireless forwarding
Be forwarded in data access request message downlink transfer link instruction information: setting current ink number be N+1, reject basis by
The first device address that proximal and distal sequence is set gradually.
In the step S105, since the difference of link sum and current ink number is greater than 0, then in the downlink transfer chain
Road indicates that there are also several forwarding targets in information, therefore local device is intermediary device, needs to continue traveling downwardly forwarding number
According to access request.
From there through abovementioned steps S101~S105, since node device is in wireless receiving to data access request message
Afterwards, message downstream transmission link preset in advance/and next forwarding target can be known from message, make message forwarding process
With directive property, destination of going directly substantially reduces message and touches so as to largely reduce in the wireless transmission message for eating dishes without rice or wine to occur
Rate and packet loss are hit, realize quickly access and saves the purpose of channel resource.
Optimization, further include following steps after the step S105: being forwarded if S106. does not receive to be directed on schedule
The reception confirmation message of data access request message, then determine retransmission failure, then retransmits the data access being forwarded
Request message, until the hop count of data access request message reaches max-forwards number.By abovementioned steps S106, may be used also
Forwarding message is confirmed and be retransmitted, prevent data access request from ending up with nothing definite, citing, the max-forwards number can
It is designed specifically to 3 times.
Advanced optimize, when the hop count of data access request message reaches max-forwards number, further include as
Lower step: S107. randomly chooses one from local device to the downlink of access target equipment from local downlink transfer link table
Standby transport link, wherein the access target equipment is for last bit equipment in the corresponding downlink transfer link instruction information
The node device of location, the downlink standby transport link include K according to the device address sequentially set gradually from the near to the distant；
S108. it is counted according in the first device address in the downlink standby transport link to described in next node device wireless forwarding
According to access request message, while updating refer in the downlink transfer link being forwarded in data access request message as follows
Show information: setting link sum is N+K, is replaced with the downlink standby transport link and was originally successively set according to sequence from the near to the distant
The all devices address set.The local downlink transfer link table is for preset a plurality of from local device to access target equipment
Downlink standby transport link, so that transmission link can be switched at any time when present transmission link is obstructed.Therefore pass through aforementioned step
Rapid S107 and S108 can switch a downlink standby transport link when determining that current downlink transmission link is obstructed at random
Forward data access request, it is ensured that data access request can be finally reached destination, particularly suitable for transmitting in current downlink
There is the case where transmission congestion in link.In addition, S105 need to be returned to step after the step S108, so as to true again
Recognize whether retransmission failure.
Optimization, in the step S101, also obtain the downlink transfer link note in the data access request message
Record information, wherein the current ink that the downlink transfer link record packet contains the link sum that numerical value is M, numerical value is N
The device address that several and N number of basis is sequentially set gradually from the near to the distant；In the step S104, the data access response disappears
Breath includes the downlink transfer link record information as uplink link instruction information；In the step S105,
It updates as follows and records information in the downlink transfer link being forwarded in data access request message: setting current ink
Number is N+1, and the downlink is added before according to the first device address sequentially set gradually from the near to the distant and sends address.It is described
Downlink transfer link record information is sequentially completed the data visit for recording from access initial plant to sender of the message direction
Ask the node device that request message is sent, that is, the node for corresponding to first device address in the downlink transfer link record information is set
Standby as previous transmission source, and so on, the node of last bit device address in the corresponding downlink transfer link record information
Equipment is to access initial plant.Since downlink transfer link record information has recorded current realization message Successful transmissions
Link information, link progress uplink feedback (refers to using downlink transfer link record information as uplink link accordingly
Show information), it can be reduced in data feedback repeating process and walk " longer way ", it is ensured that data access response message can be rapidly
Feed back to access initial plant.
It advanced optimizes, node device includes the following steps: after wireless receiving to data access response message
S201. uplink transmission address, uplink receiving address and the uplink link obtained in the data access response message refers to
Show information, wherein the current ink that the uplink link instruction packet contains the link sum that numerical value is X, numerical value is Y
The device address that number and X-Y basis are sequentially set gradually from the near to the distant, X are nonnegative integer, and Y is the nonnegative integer no more than X；
S202. judge the uplink receiving address whether with local device address matching, the data access is deleted if mismatching and is rung
Message is answered, it is no to then follow the steps S203；S203. judge the link sum and current chain in the uplink link instruction information
Whether the difference of number is 0, no to then follow the steps S205 if so then execute step S204；S204. local device is determined to access
Beginning equipment saves and/or shows the data access response message；S205. determine that local device is intermediary device, according to
First device address in uplink link instruction information is visited to data described in next node device wireless forwarding
It asks response message, while is updated as follows in the uplink link instruction letter being forwarded in data access response message
Breath: setting current ink number is Y+1, is rejected according to the first device address sequentially set gradually from the near to the distant.Wherein, described
Further include following steps before step S202: judge the uplink send address whether in local repeated link table wherein
One downstream plant address matching deletes the data access response message if mismatching, no to then follow the steps S202.
Optimize in detail, further include following steps after the step S205: if S206. is not received for quilt on schedule
The reception confirmation message for forwarding data access response message, then determine retransmission failure, then retransmit the data being forwarded
Access response message, until the hop count of data access response message reaches max-forwards number.
Further optimize in detail, when the hop count of data access response message reaches max-forwards number, also wraps
Include following steps: S207. randomly chooses one from local device to access initial plant from local downlink transfer link table
Uplink standby transport link, wherein the access initial plant is that the corresponding uplink link indicates that last bit is set in information
The node device of standby address, the uplink standby transport link include the Z equipment according to sequentially setting gradually from the near to the distant
Address；S208. according to the first device address in the uplink standby transport link to next node device wireless forwarding
The data access response message, while updated as follows in the downlink transfer being forwarded in data access response message
Link indicates information: setting link sum is Y+Z, is replaced originally with the uplink standby transport link according to sequence from the near to the distant
The all devices address set gradually.
Abovementioned steps S201~S208 describes processing of the node device after wireless receiving to data access response message
Method, detail and technical effect are corresponding or similar to the processing method of step S101~S108, repeat no more in this.
To sum up, using the side for realizing directional data access provided by the present embodiment in multinode wireless transmitting system
Method has the following technical effect that
(1) a kind of method that directional data access can be realized in multinode wireless transmitting system is present embodiments provided,
I.e. node device can be known after wireless receiving to data access request message/and data access response message from message
Message transmission link preset in advance/and next forwarding target make message forwarding process have directive property, destination of going directly,
So as to largely reduce in the wireless transmission message for eating dishes without rice or wine to occur, message transition collision rate and packet loss are substantially reduced, is realized quick
Access and the purpose for saving channel resource；
(2) it is described realize directional data access method also have forwarding message can confirm, transmission link can switch halfway
And the advantages that closing rule can be carried out to transport protocol stack, it is convenient for practical application and popularization.
Embodiment two
As shown in figure 4, a kind of node device for realizing one the method for previous embodiment is present embodiments provided, including the
One acquiring unit, the first judging unit, second judgment unit, the first execution unit and the second execution unit；
The first acquisition unit, for obtaining the data access after wireless receiving to data access request message
Downlink in request message sends address, downlink reception address and downlink transfer link and indicates information, wherein the downlink passes
Transmission link instruction packet contains the link sum that numerical value is M, the current ink number that numerical value is N and M-N basis from the near to the distant
The device address that sequence is set gradually, M are nonnegative integer, and N is the nonnegative integer no more than M；
First judging unit, communicates to connect the first acquisition unit, for judging that the downlink reception address is
No and local device address matching deletes the data access request message if mismatching, and otherwise starts second judgement
Unit；
The second judgment unit communicates to connect first judging unit, for judging that the downlink transfer link refers to
Whether the difference for showing link sum and current ink number in information is 0, if then starting first execution unit, is otherwise started
Second execution unit；
First execution unit, communicates to connect the second judgment unit, for determining local device for access target
Equipment generates data access response message corresponding with the data access request message, and sends address according to the downlink
The data access response message is sent to the node device feedback for sending the data access request message；
Second execution unit, communicates to connect the second judgment unit, for determining local device for intermediate node
Equipment, according to the first device address in downlink transfer link instruction information to next node device wireless forwarding institute
Data access request message is stated, while is updated as follows in the downlink transfer chain being forwarded in data access request message
Road indicates information: setting current ink number is N+1, is rejected according to the first device address sequentially set gradually from the near to the distant.
Optimization, further include the first forwarding confirmation unit, for not receiving for being forwarded data access request on schedule
When the reception confirmation message of message, then retransmission failure is determined, then retransmit the data access request message being forwarded, directly
Hop count to data access request message reaches max-forwards number.
It advanced optimizes, further includes the first transmission link selecting unit and third execution unit；
The first transmission link selecting unit, for reaching max-forwards in the hop count of data access request message
When number, one is randomly choosed from local downlink transfer link table from local device to the spare biography of the downlink of access target equipment
Then transmission link starts the third execution unit, wherein the access target equipment is that the corresponding downlink transfer link refers to
Show that the node device of last bit device address in information, the downlink standby transport link include K according to sequence from the near to the distant
The device address set gradually；
The third execution unit communicates to connect the first transmission link selecting unit, for according in the downlink
First device address in standby transport link is to data access request message described in next node device wireless forwarding, simultaneously
It updates as follows and indicates information in the downlink transfer link being forwarded in data access request message: setting link sum
For N+K, replaced originally with the downlink standby transport link according to all devices address sequentially set gradually from the near to the distant.
Optimization, further include the third judgement list between the first acquisition unit and first judging unit
Member, for judge the downlink send address whether with one of upstream plant address matching in local repeated link table,
The data access request message is deleted if mismatching, and otherwise starts first judging unit.
Optimization, the first acquisition unit is also used to obtain the downlink transfer link in the data access request message
Record information, wherein the current chain that the downlink transfer link record packet contains the link sum that numerical value is M, numerical value is N
The device address that number and N number of basis are sequentially set gradually from the near to the distant；
First execution unit is also used to when generating the data access response message, by the downlink transfer chain
Road records information and is added in the data access response message as uplink link instruction information；
Second execution unit is also used to be updated as follows in the case where being forwarded in data access request message
Row transmission link records information: setting current ink number is N+1, according to the first equipment sequentially set gradually from the near to the distant
The downlink is added before location sends address.
It advanced optimizes, further includes second acquisition unit, the 4th judging unit, the 5th judging unit, the 4th executes list
Member and the 5th execution unit；
The second acquisition unit, for obtaining the data access after wireless receiving to data access response message
Uplink in response message sends address, uplink receiving address and uplink link and indicates information, wherein the uplink passes
Transmission link instruction packet contains the link sum that numerical value is X, the current ink number that numerical value is Y and X-Y basis from the near to the distant
The device address that sequence is set gradually, X are nonnegative integer, and Y is the nonnegative integer no more than X；
4th judging unit, communicates to connect the second acquisition unit, for judging that the uplink receiving address is
No and local device address matching deletes the data access response message if mismatching, and otherwise starts the 5th judgement
Unit；
5th judging unit communicates to connect the 4th judging unit, for judging that the uplink link refers to
Whether the difference for showing link sum and current ink number in information is 0, if then starting the 4th execution unit, is otherwise started
5th execution unit；
4th execution unit communicates to connect the 5th judging unit, for determining local device for access starting
Equipment saves and/or shows the data access response message；
5th execution unit communicates to connect the 5th judging unit, for determining local device for intermediate node
Equipment, according to the first device address in uplink link instruction information to next node device wireless forwarding institute
Data access response message is stated, while is updated as follows in the uplink chain being forwarded in data access response message
Road indicates information: setting current ink number is Y+1, is rejected according to the first device address sequentially set gradually from the near to the distant.
Optimize in detail, further include the second forwarding confirmation unit, for not receiving for being forwarded data access on schedule
When the reception confirmation message of response message, then retransmission failure is determined, then retransmit the data access request being forwarded and disappear
Breath, until the hop count of data access response message reaches max-forwards number.
Further optimize in detail, further includes the second transmission link selecting unit and the 6th execution unit；
The second transmission link selecting unit, for reaching max-forwards in the hop count of data access response message
When number, one is randomly choosed from local downlink transfer link table from local device to the spare biography of uplink of access initial plant
Then transmission link starts the 6th execution unit, wherein the access initial plant is that the corresponding uplink link refers to
Show that the node device of last bit device address in information, the uplink standby transport link include Z according to sequence from the near to the distant
The device address set gradually；
6th execution unit communicates to connect the second transmission link selecting unit, for according in the uplink
First device address in standby transport link is to data access response message described in next node device wireless forwarding, simultaneously
It updates as follows and indicates information in the downlink transfer link being forwarded in data access response message: setting link sum
For Y+Z, replaced originally with the uplink standby transport link according to all devices address sequentially set gradually from the near to the distant.
Optimize in detail, further includes the 6th judgement between the second acquisition unit and the 4th judging unit
Unit, for judge the uplink send address whether with one of downstream plant address in local repeated link table
Match, the data access response message is deleted if mismatching, otherwise starts the 4th judging unit.
Specifically, the access initial plant be PC (personal computer, personal computer) equipment, it is described in
Segmentum intercalaris point device includes centralized manager, repeater and/or label base station, and the access target equipment is active label, label
Base station or centralized manager.
The technical detail and technical effect of the present embodiment are consistent with the content of embodiment one, repeat no more in this.
The present invention is not limited to above-mentioned optional embodiment, anyone can show that other are each under the inspiration of the present invention
The product of kind form.Above-mentioned specific embodiment should not be understood the limitation of pairs of protection scope of the present invention, protection of the invention
Range should be subject to be defined in claims, and specification can be used for interpreting the claims.
Claims (10)
1. a kind of node device for realizing directional data access in multinode wireless transmitting system, it is characterised in that: including the
One acquiring unit, the first judging unit, second judgment unit, the first execution unit and the second execution unit；
The first acquisition unit, for obtaining the data access request after wireless receiving to data access request message
Downlink in message sends address, downlink reception address and downlink transfer link and indicates information, wherein the downlink transfer chain
Road instruction packet contains the link sum that numerical value is M, the current ink number that numerical value is N and M-N basis sequence from the near to the distant
The device address set gradually, M are nonnegative integer, and N is the nonnegative integer no more than M；
First judging unit, communicates to connect the first acquisition unit, for judge the downlink reception address whether with
Local device address matching deletes the data access request message if mismatching, otherwise starts the second judgment unit；
The second judgment unit communicates to connect first judging unit, for judging the downlink transfer link instruction letter
Whether the difference of link sum and current ink number in breath is 0, if then starting first execution unit, otherwise starts second
Execution unit；
First execution unit, communicates to connect the second judgment unit, for determine local device for access target equipment,
Data access response message corresponding with the data access request message is generated, and address is sent to transmission according to the downlink
The node device feedback of the data access request message sends the data access response message；
Second execution unit, communicates to connect the second judgment unit, for determine local device for intermediary device,
It is counted according to the first device address in downlink transfer link instruction information to described in next node device wireless forwarding
According to access request message, while updating refer in the downlink transfer link being forwarded in data access request message as follows
Show information: setting current ink number is N+1, is rejected according to the first device address sequentially set gradually from the near to the distant.
2. a kind of node device that directional data access is realized in multinode wireless transmitting system as described in claim 1,
It is characterized by also including the first forwarding confirmation units, for not receiving for being forwarded data access request message on schedule
Reception confirmation message when, then determine retransmission failure, the data access request message being forwarded then retransmitted, until number
Reach max-forwards number according to the hop count of access request message.
3. a kind of node device that directional data access is realized in multinode wireless transmitting system as claimed in claim 2,
It is characterized by also including the first transmission link selecting unit and third execution units；
The first transmission link selecting unit, for reaching max-forwards number in the hop count of data access request message
When, a downlink standby transport chain from local device to access target equipment is randomly choosed from local downlink transfer link table
Then road starts the third execution unit, wherein the access target equipment is the corresponding downlink transfer link instruction letter
The node device of last bit device address in breath, the downlink standby transport link include K according to from the near to the distant sequence successively
The device address of setting；
The third execution unit communicates to connect the first transmission link selecting unit, for according to spare in the downlink
First device address in transmission link to data access request message described in next node device wireless forwarding, while according to
Indicate information in the downlink transfer link being forwarded in data access request message as under type is updated: setting link sum is N+
K is replaced originally with the downlink standby transport link according to all devices address sequentially set gradually from the near to the distant.
4. a kind of node device that directional data access is realized in multinode wireless transmitting system as described in claim 1,
It is characterized by also including the third judging units between the first acquisition unit and first judging unit, use
In judge the downlink send address whether with one of upstream plant address matching in local repeated link table, if not
The data access request message is then deleted in matching, otherwise starts first judging unit.
5. a kind of node device that directional data access is realized in multinode wireless transmitting system as described in claim 1,
It is characterized by: the first acquisition unit is also used to obtain the record of the downlink transfer link in the data access request message
Information, wherein the current ink number that the downlink transfer link record packet contains the link sum that numerical value is M, numerical value is N
The device address sequentially set gradually from the near to the distant with N number of basis；
First execution unit is also used to when generating the data access response message, and the downlink transfer link is remembered
Record information is added in the data access response message as uplink link instruction information；
Second execution unit is also used to update as follows in the downlink biography being forwarded in data access request message
Transmission link records information: setting current ink number is N+1, the first device address that sequentially sets gradually from the near to the distant of basis it
The preceding addition downlink sends address.
6. a kind of node device that directional data access is realized in multinode wireless transmitting system as claimed in claim 5,
It is characterized by also including second acquisition unit, the 4th judging unit, the 5th judging unit, the 4th execution units and the 5th to hold
Row unit；
The second acquisition unit, for after wireless receiving to data access response message, obtaining the data access response
Uplink in message sends address, uplink receiving address and uplink link and indicates information, wherein the uplink chain
Road instruction packet contains the link sum that numerical value is X, the current ink number that numerical value is Y and X-Y basis sequence from the near to the distant
The device address set gradually, X are nonnegative integer, and Y is the nonnegative integer no more than X；
4th judging unit, communicates to connect the second acquisition unit, for judge the uplink receiving address whether with
Local device address matching deletes the data access response message if mismatching, otherwise starts the 5th judging unit；
5th judging unit communicates to connect the 4th judging unit, for judging the uplink link instruction letter
Whether the difference of link sum and current ink number in breath is 0, if then starting the 4th execution unit, otherwise starts the 5th
Execution unit；
4th execution unit communicates to connect the 5th judging unit, for determine local device to access initial plant,
Save and/or show the data access response message；
5th execution unit communicates to connect the 5th judging unit, for determine local device for intermediary device,
It is counted according to the first device address in uplink link instruction information to described in next node device wireless forwarding
According to access response message, while updating refer in the uplink link being forwarded in data access response message as follows
Show information: setting current ink number is Y+1, is rejected according to the first device address sequentially set gradually from the near to the distant.
7. a kind of node device that directional data access is realized in multinode wireless transmitting system as claimed in claim 6,
It is characterized by also including the second forwarding confirmation units, for not receiving for being forwarded data access response message on schedule
Reception confirmation message when, then determine retransmission failure, the data access request message being forwarded then retransmitted, until number
Reach max-forwards number according to the hop count of access response message.
8. a kind of node device that directional data access is realized in multinode wireless transmitting system as claimed in claim 7,
It is characterized by also including the second transmission link selecting unit and the 6th execution units；
The second transmission link selecting unit, for reaching max-forwards number in the hop count of data access response message
When, one is randomly choosed from local downlink transfer link table from local device to the uplink standby transport chain of access initial plant
Then road starts the 6th execution unit, wherein the access initial plant is the corresponding uplink link instruction letter
The node device of last bit device address in breath, the uplink standby transport link include Z according to from the near to the distant sequence successively
The device address of setting；
6th execution unit communicates to connect the second transmission link selecting unit, for according to spare in the uplink
First device address in transmission link to data access response message described in next node device wireless forwarding, while according to
Indicate information in the downlink transfer link being forwarded in data access response message as under type is updated: setting link sum is Y+
Z is replaced originally with the uplink standby transport link according to all devices address sequentially set gradually from the near to the distant.
9. a kind of node device that directional data access is realized in multinode wireless transmitting system as claimed in claim 6,
It is characterized by also including the 6th judging units between the second acquisition unit and the 4th judging unit, use
In judge the uplink send address whether with one of downstream plant address matching in local repeated link table, if not
The data access response message is then deleted in matching, otherwise starts the 4th judging unit.
10. a kind of node device that directional data access is realized in multinode wireless transmitting system as claimed in claim 6,
It is characterized by:
The access initial plant is PC equipment, and the intermediary device includes centralized manager, repeater and/or label base
It stands, the access target equipment is active label, label base station or centralized manager.
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