CN104039020B - A kind of wireless nano sensor network dynamic access method based on priority - Google Patents
A kind of wireless nano sensor network dynamic access method based on priority Download PDFInfo
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- CN104039020B CN104039020B CN201410245476.1A CN201410245476A CN104039020B CN 104039020 B CN104039020 B CN 104039020B CN 201410245476 A CN201410245476 A CN 201410245476A CN 104039020 B CN104039020 B CN 104039020B
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Abstract
A kind of wireless nano sensor network dynamic access method based on priority, the Access Control of access node, including procedure below are completed by the simple computation in access node and the low complex degree interaction step and via node of via node：Access node notifies via node to have new data flow to need relaying by sending an access request control bag with priority factor, via node once receives access request control bag, access node is calculated according to the ratio formula of the priority of the access node and total priority to start the transmission time and continuously transmit bit number and notify the access node by replying a control bag, wherein, it is core of the invention that via node determines that access node starts the transmission time and continuously transmits bit number based on priority.The present invention is highly suitable for the relatively low nano-sensor node of disposal ability, can avoid the transmission conflict of wireless nano sensor network interior joint.
Description
Technical field
The invention belongs to wireless nano sensor network technology, it is related to one kind based on node priority to determine access node
The dynamic access method of character rate.
Technical background
With the development of nanometer technology, producing the wireless senser i.e. nano-sensor of nanoscale size, have become can
Energy.The network that nano-sensor is formed by connecting by wireless nanometer technology is then referred to as wireless nano sensor network, and it is in vivo
There is very wide prospect in terms of drug delivery, air pollution monitoring.
Detachable key switch is OOK modulation systems, be the physical layer modulation mode that has wide application prospects of wireless nano-sensor it
One.OOK modulation systems are that a pulse signal is only sent when sending " 1 " bit, and are kept quite when sending " 0 " bit
Any voltage signal is not sent on antenna.On this basis, the cut-in method design of its related data link layer, such as be applicable
IEEE802.11MAC agreements in WLAN, designed using the Cellular Networks of CDMA technology etc., both for existing network
Macroscopical node is designed, with of a relatively high complexity.And wireless nano-sensor node only has about hundreds of nanometers
Size, the disposal ability of its nanoprocessor is very limited, so these are not all suitable for the very limited amount of nanometer of disposal ability
Sensor node.
If each nano-sensor node is often sent out after a bit symbol, one fixed time interval T of free time
Next bit symbol is retransmited, then can substantially reduce the occurrence frequency that symbol sends conflict.However, both ought start
The adjacent node for sending bit information just starts to send first bit symbol in synchronization, i.e., first bit sends hair
Conflict is given birth to, then follow-up all bits send and can all clashed, so as to can cause substantial amounts of bit reception on receiving node
Mistake.
Further, since the requirement of real-time of data is different with the importance of data, the perception of different nano-sensor nodes
Data may have different priority.When the data of different priorities flexible strategy access same via node simultaneously, we
Its priority size is must take into consideration, priority is higher, and its character rate should be bigger, and so its relaying time is also shorter, that is, wraps
Transmission delay is shorter.
The content of the invention
In order to overcome, the bandwidth availability ratio of the wireless nano sensor network cut-in method of existing OOK modulation is relatively low, conflict frequency
Rate is higher, do not consider the deficiencies such as real-time, and the present invention proposes that a kind of wireless nano sensor network based on priority dynamically connects
Access control method, can accomplish Lothrus apterus, high bandwidth utilization, and real-time property transmission demand can be taken into account again.
In order to solve the above-mentioned technical problem the present invention proposes following technical scheme：
A kind of wireless nano sensor network dynamic access method based on priority, the dynamic access control method bag
Include following steps：
1) access node is operated, and process is as follows：
(1.1) send an access request for containing priority parameters P to via node and control bag, to notify relaying to save
This node of point has data flow to be sent to via node, wherein, P is a positive integer value, is worth bigger expression priority higher；
(1.2) the reply control bag from via node is received, then via node institute is read from reply control bag
Specify and start delivery time tiWith continuously transmit number of bits Ni, tiAnd NiIt is to determine and write reply control by via node
Parameter value in bag, wherein, subscript i is the numbering for i-th of access node that via node stored record has MAC Address；
(1.3) in moment tiStart, using T as the cycle, carved at the beginning of each cycle and continuously transmit NiIndividual bit symbol,
This N has been sent in cycleiRemaining T-N after individual bit symboli×TsAny bit symbol is not sent in time, that is, keeps sending
Idle, wherein, TSIt is that physical layer sends the time that a modulation symbol is consumed, T is advance according to network delay requirement
The value set, T is TSIntegral multiple value；
(1.4) in data transmission procedure, if receiving the control from via node in the free time in some cycle
System bag, then jump to step (1.2)；
2) relay node operation, process is as follows：
(2.1) the access request control bag transmitted by new access node is received, access node total number parameter n is updated:n
← n+1, n are initialized as 0 when network starts deployment or via node is restarted, and new access node is read from control bag
MAC Address is simultaneously stored, and marks the access node to be node n, while reading priority parameters from the control bag and remembering
For Pn, update all access node priority sum parameter PT:PT←PT+Pn, PTWhen network starts deployment or node is restarted
Time is initialized as 0；
(2.2) for each i ∈ { 1,2n }, character rate is calculatedAnd continuously transmit bit
NumberIf Ni＜ 1, then jump to step (2.6) and carry out end operation and do not reply any control to access node
Bag performs parameter renewal P to represent to refuse its access requestT←PT-PnWith n ← n-1, if Ni>=1 progress next step
Operation；
(2.3) for each i ∈ { 1,2n }, t is madei=ti-1+ri-1×Ts, wherein r0=0 and t0To be next
Carved at the beginning of cycle, tiIt is at the time of starting to send bit symbol in node i next transmission cycle；
(2.4) for each i ∈ { 1,2n }, a new control bag is all generated, the control bag is included than JP
Beginning delivery time ti, continuously transmit number of bits Ni, the control bag is then sent to access node i；
(2.5) packet to be received from access node such as, when all information for having received any some access node i
Afterwards, P is madeT←PT-Pi, and delete the MAC Address of the node stored；Then access node n is labeled as node i, and
Make n ← n-1；Then return to step (2.2)；
(2.6) terminate.
The technical characterstic and effect of the present invention：
1) present invention accomplishes the requirement of real-time during True Data bit transfer.By priority flexible strategy in real time
The strong information active repeating of property is to next-hop node.In addition, other low-priority data streams also have certain transmission rate.
2) may occur the weak point of continuous symbol conflict instant invention overcomes the OOK modulation of time domain extension, realize hair
Send no symbol conflict.
3) present invention has higher channel utilization.Even the minimum data of priority, when only it is individually transmitted
When, it is identical with the efficiency that the data of single highest priority are transmitted.
Brief description of the drawings
Fig. 1 is the nano-sensor data transmission schematic diagram of the present invention.
Fig. 2 is the implementation procedure of the connection control method of the present invention.
Fig. 3 is that the bit symbol of access node sends schematic diagram.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
1~Fig. 3 of reference picture, a kind of wireless nano sensor network dynamic access method based on priority, including it is following
Step：
1) access node is operated, and process is as follows：
(1.1) send an access request for containing priority parameters P to via node and control bag, to notify relaying to save
This node of point has data flow to be sent to via node, wherein, P is a positive integer value, is worth bigger expression priority higher；
(1.2) the reply control bag from via node is received, then via node institute is read from reply control bag
Specify and start delivery time tiWith continuously transmit number of bits Ni, tiAnd NiIt is to determine and write reply control by via node
Parameter value in bag, wherein, subscript i is the numbering for i-th of access node that via node stored record has MAC Address；
(1.3) in moment tiStart, using T as the cycle, carved at the beginning of each cycle and continuously transmit NiIndividual bit symbol,
This N has been sent in cycleiRemaining T-N after individual bit symboli×TsAny bit symbol is not sent in time, that is, keeps sending
Idle, wherein, TSIt is that physical layer sends the time that a modulation symbol is consumed, T is advance according to network delay requirement
The value set, T is TSIntegral multiple value；
(1.4) in data transmission procedure, if receiving the control from via node in the free time in some cycle
System bag, then jump to step (1.2)；
2) relay node operation, process is as follows：
(2.1) the access request control bag transmitted by new access node is received, access node total number parameter n is updated:n
← n+1, n are initialized as 0 when network starts deployment or via node is restarted, and new access node is read from control bag
MAC Address is simultaneously stored, and marks the access node to be node n, while reading priority parameters from the control bag and remembering
For Pn, update all access node priority sum parameter PT:PT←PT+Pn, PTWhen network starts deployment or node is restarted
Time is initialized as 0；
(2.2) for each i ∈ { 1,2n }, character rate is calculatedAnd continuously transmit bit
NumberIf Ni＜ 1, then jump to step (2.6) come end operation and not to access node reply it is any control bag with
Represent to refuse its access request, and perform parameter renewal PT←PT-PnWith n ← n-1, if Ni>=1 progress next step behaviour
Make；
(2.3) for each i ∈ { 1,2n }, t is madei=ti-1+ri-1×Ts, wherein r0=0 and t0To be next
Carved at the beginning of cycle, tiIt is at the time of starting to send bit symbol in node i next transmission cycle；
(2.4) for each i ∈ { 1,2n }, a new control bag is all generated, the control bag is included than JP
Beginning delivery time ti, continuously transmit number of bits Ni, the control bag is then sent to access node i；
(2.5) packet to be received from access node such as, when all information for having received any some access node i
Afterwards, P is madeT←PT-Pi, and delete the MAC Address of the node stored；Then access node n is labeled as node i, and
Make n ← n-1；Then return to step (2.2)；
(2.6) terminate.
In the present embodiment, as shown in figure 1, being P when there is a priority flexible strategy1Data flow f1When flowing through certain via node,
The total priority flexible strategy of the via node are updated to P1, the data flow starts transmission time t1For 0, continuously transmitting bit number isIt is P when there is another priority flexible strategy2Data flow f2When flowing through same via node, the via node
Total priority flexible strategy are updated to P1+P2, data flow f1Start transmission time t1For the initial time in next transmission cycle, continuously
Sending bit number isData flow f2Start transmission time t2For the initial time in next transmission cycle
AddContinuously transmitting bit number isBy that analogy, as nth data stream fn
When flowing through the via node, the via node will update its total priority flexible strategy P:P←P+Pn, and to each i ∈ 1,
2n } update tiAnd Ni.When wherein some access node has sent all data, via node is needed also exist for again
Total priority flexible strategy and access node total number are updated, and calculates the NEW BEGINNING of each access node and sends time and continuous hair
Send number of bits and notify each access node by sending control bag.
Claims (1)
1. a kind of wireless nano sensor network dynamic access method based on priority, it is characterised in that：The dynamic access
Control method comprises the following steps：
1) access node is operated, and process is as follows：
(1.1) send one to via node and contain priority parameters PnAccess request control bag, to notify via node sheet
Node has data flow to be sent to via node, wherein, PnFor a positive integer value, it is worth bigger expression priority higher；
(1.2) the reply control bag from via node is received, is then read from reply control bag specified by via node
Start delivery time tiWith continuously transmit number of bits Ni, tiAnd NiIt is to be determined and write in reply control bag by via node
Parameter value, wherein, subscript i is the numbering for i-th of access node that via node stored record has MAC Address；
(1.3) in moment tiStart, using T as the cycle, carved at the beginning of each cycle and continuously transmit NiIndividual bit symbol, cycle
It is interior to have sent this NiRemaining T-N after individual bit symboli×TsAny bit symbol is not sent in time, that is, keeps transtation mission circuit
Free time, wherein, TSIt is that physical layer sends the time that a modulation symbol is consumed, T is pre-set according to network delay requirement
Good value, T is TSIntegral multiple value；
(1.4) in data transmission procedure, if receiving the control bag from via node in the free time in some cycle,
Then jump to step (1.2)；
2) relay node operation, process is as follows：
(2.1) the access request control bag transmitted by new access node is received, access node total number parameter n is updated:n←n+
1, n is initialized as 0 when network starts deployment or via node is restarted, and the MAC of new access node is read from control bag
Address is simultaneously stored, and marks the access node to be node n, while reading priority parameters from the control bag and being designated as
Pn, update all access node priority sum parameter PT:PT←PT+Pn, PTWhen network starts deployment or node is restarted
It is initialized as 0；
(2.2) for each i ∈ { 1,2n }, character rate is calculatedAnd continuously transmit number of bitsIf Ni＜ 1, then jump to step (2.6) and carry out end operation and do not reply any control bag to access node with table
Show its access request of refusal, and perform parameter and update PT←PT-PnWith n ← n-1, if Ni>=1 progress next step operation；
(2.3) for each i ∈ { 1,2n }, t is madei=ti-1+ri-1×Ts, wherein r0=0 and t0For next cycle
At the beginning of carve, tiIt is at the time of starting to send bit symbol in node i next transmission cycle；
(2.4) for each i ∈ { 1,2n }, a new control bag is all generated, the control bag starts hair comprising bit
Send moment ti, continuously transmit number of bits Ni, the control bag is then sent to access node i；
(2.5) packet to be received from access node such as, after any some access node i all information have been received,
Make PT←PT-Pi, and delete the MAC Address of the node stored；Then access node n is labeled as node i, and makes n
←n-1；Then return to step (2.2)；
(2.6) terminate.
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| CN201410245476.1A CN104039020B (en) | 2014-06-04 | 2014-06-04 | A kind of wireless nano sensor network dynamic access method based on priority |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9787491B2 (en) | 2015-03-20 | 2017-10-10 | Landis & Gyr Innovations, Inc. | Interleaved communication with resource providers and a home area network |
| EP3318007B1 (en) * | 2015-06-30 | 2021-10-27 | Nokia Solutions and Networks Oy | Proximity services priority control for multicast traffic in proximity services user equipment network relay scenario |
| US10143000B2 (en) | 2016-12-12 | 2018-11-27 | Landis+Gyr Innovations, Inc. | Prioritized association between child devices and parent devices operating on a time-slotted channel hopping network |
| US11115881B2 (en) | 2019-08-08 | 2021-09-07 | Landis+Gyr Innovations, Inc. | Heterogeneous networks using two channel hopping protocols |
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| CN101483893A (en) * | 2008-12-23 | 2009-07-15 | 同济大学 | Fast access point switching method based on dynamic access path selection mechanism |
| CN103313310A (en) * | 2012-03-06 | 2013-09-18 | 电信科学技术研究院 | Method and equipment for frame information transmission and resource processing in self-organizing network |
| CN103607777A (en) * | 2013-10-11 | 2014-02-26 | 中国人民解放军重庆通信学院 | Random channel access method of narrow pulse ultra wide band network and based on business priorities |
| CN103702392A (en) * | 2013-12-11 | 2014-04-02 | 浙江工业大学 | Dynamic access control method with high bandwidth efficiency for wireless nano-sensor network |
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Patent Citations (4)
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|---|---|---|---|---|
| CN101483893A (en) * | 2008-12-23 | 2009-07-15 | 同济大学 | Fast access point switching method based on dynamic access path selection mechanism |
| CN103313310A (en) * | 2012-03-06 | 2013-09-18 | 电信科学技术研究院 | Method and equipment for frame information transmission and resource processing in self-organizing network |
| CN103607777A (en) * | 2013-10-11 | 2014-02-26 | 中国人民解放军重庆通信学院 | Random channel access method of narrow pulse ultra wide band network and based on business priorities |
| CN103702392A (en) * | 2013-12-11 | 2014-04-02 | 浙江工业大学 | Dynamic access control method with high bandwidth efficiency for wireless nano-sensor network |
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