CN103813363A - Method for self-adaption media access control of mobile nodes - Google Patents
Method for self-adaption media access control of mobile nodes Download PDFInfo
- Publication number
- CN103813363A CN103813363A CN201410063575.8A CN201410063575A CN103813363A CN 103813363 A CN103813363 A CN 103813363A CN 201410063575 A CN201410063575 A CN 201410063575A CN 103813363 A CN103813363 A CN 103813363A
- Authority
- CN
- China
- Prior art keywords
- node
- nodes
- energy consumption
- access control
- mobile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to a method for self-adaption media access control of mobile nodes and belongs to the technical field of wireless networks. The nodes undergo sleep, interception and synchronization periodically, perform data communication during an interception period and enter a sleep state during a sleep period to reduce power consumption, and a synchronization mechanism is adopted, so that consistent interception sleep dispatching is formed between the nodes. The method is characterized in that the nodes perform self-adaption adjustment during a synchronization period and comprises the steps of evaluating movement speeds of the nodes according to changes of RSSI values; adjusting synchronization frequency according to the node movement speeds obtained according to the prior step; estimating node transmission delay and energy consumption at the sending end; and enabling the receiving end nodes to perform duty cycle self-adaption adjustment. The method has the advantages that a network has high efficiency in node static and moving scenes, and the new cluster adding speed of the nodes is improved; the transmission delay is further reduced while reasonable energy consumption is guaranteed; and the method is low in incoming control cost and easy to achieve.
Description
Technical field
The invention belongs to radio network technique field, be specifically related to a kind of mobile node adaptation media access control (MAC) method applicable.
Background technology
(English full name is wireless sensor network: Wireless Sensor Network, English abbreviation: be WSN) wireless network being made up of in the mode of self-organizing and multi-hop a large amount of static or mobile sensor nodes.Conventionally, wireless sensing node adopts powered battery, and the portable energy content of battery is very limited, and may be deployed in harsh environment, is therefore difficult to by changing battery or the makeup energy of charging with; On the other hand, if multinode is accessed radio spectrum resources simultaneously, and mutually produce conflict and disturb, cause bust this thus and the re-transmission that causes, also can accelerate node energy consumption.In wireless sensor network, the English full name of MAC(is: Medium Access Control, Chinese is: media interviews control) agreement determines the occupation mode of wireless channel, one of its main target is between sensor node, to distribute limited wireless communication resources, it directly affects the efficiency of system as the Main Means of control network nodes share medium.
In current wireless sensor network, MAC agreement generally adopts periodically and intercepts with sleep mechanism and reduce the energy loss that idle listening brings, and improves thus node efficiency.A cycle of operation length is fixed to the two parts of intercepting and sleep, and the ratio of its time of intercept and whole Cycle Length is duty ratio, is also fixed value.Node carries out data communication between listen period, enters sleep state to reduce power consumption between sleep period.In order to guarantee the accurate communication between node, Protocol Design adopts synchronization mechanism, before sync packet is positioned at data content, makes to form between node the consistent sleep scheduling of intercepting, receive and forward sync packet by periodicity, make to form between node the consistent sleep scheduling of intercepting.Never find that for fear of two nodes the other side's (for example, the damage of sync packet, collision or communication media are busy all the time, make synchronization packets the reason such as cannot be sent in time) or sensor network structure change, each node is carried out neighbor discovery process.Neighbor discovery process be one-period carry out the process (for example every weight in 10 seconds that carries out for 2 minutes is synchronous) of re-synchronization, heavy synchronous frequency and duration is fixed value.But this quasi-protocol does not require that in network, all nodes carry out synchronously, only needing synchronisation of nodes in same cluster or virtual cluster, and the node on bunch border need be followed the timetable of multiple differences bunch or virtual cluster.But, in the actual application of wireless sensor network, the performance performance of above-mentioned MAC agreement is very limited, its reason is mainly: 1. in recent years, wireless sensor network is located at human body, the application of the aspect such as rehabilitation and health care is more and more, due to the natural mobility of human body, the transducer of disposing constantly moves with human body, to make network topology structure frequently change, if a mobile node need to re-establish and be connected with the node in another bunch, must wait for new synchronizing cycle, in this course, the other parts of mobile node and network disconnect, introduce time delay, thereby can make the transmission performance variation of network.2. the data traffic in wireless sensor network often changes, and does not have under many circumstances rule or rule to follow, thereby, if adopt fixed cycle and duty ratio, in the time that transmission rate is higher, easily cause buffer overflow packet loss; And in volume of transmitted data hour, unnecessary wakeup process, by consumes energy, declines protocol capabilities.
In view of above-mentioned prior art, be necessary to be improved, for this reason, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
The object of the present invention is to provide a kind of media access control (MAC) method applicable of mobile node adaptation, make node can mobile in the situation that, obtain good performance, and can dynamically adjust duty ratio according to transmission load condition, reduce the time delay in high speed data transfer process.
The object of the invention is to reach like this, a kind of media access control (MAC) method applicable of mobile node adaptation, described node is periodically slept, is intercepted and synchronously, node carries out data communication between listen period, enters sleep state to reduce power consumption between sleep period, and by adopting synchronization mechanism, make to form the consistent sleep scheduling of intercepting between node, it is characterized in that, node is between sync period, carry out self adaptation adjustment, specifically comprise the steps:
Step 1: according to RSSI(received signal strength) translational speed of variation assessment node of value;
Step 2: the frequency synchronous according to the translational speed adjustment of the node being drawn by step 1;
Step 3: node transmission delay and energy consumption are estimated at transmitting terminal;
Step 4: receiving terminal node carries out the adjustment of duty ratio self adaptation.
In a specific embodiment of the present invention, the translational speed that node is assessed in the described variation according to RSSI value refers to that the variation of RSSI value is faster, and node motion is faster; If there are multiple RSSI values, get maximum RSSI changing value, estimate thus whether node moves and mobile speed.
In another specific embodiment of the present invention, the described frequency synchronous according to the translational speed adjustment of node, refers to and first judges whether to exist Initial R SSI value, if do not exist, records current RSSI value; If exist, poor with Initial R SSI value, RSSI changing value and pre-set RSSI threshold value are compared, estimate the speed of node motion, and generating a Mobility(and move) field is in order to characterize mobile speed, sends after being attached to SYNC packet: in the situation that node self is moved, node towards periphery node sends Mobility information, around node improves synchronizing frequency according to this information, reduces the speed that this node adds new bunch; In the situation that node is moved around, node equally towards periphery node sends Mobility information, and around node is accelerated synchronizing frequency.
In another specific embodiment of the present invention, described refers to that to node transmission delay and energy consumption estimation entering transmit queue with packet is characterized single-hop time delay approx to successfully sending the required time at transmitting terminal, simultaneously, read node energy consumption relevant information, the packet amount of upgrading average delay in this cycle, energy consumption and receiving with this, node sends these data with data packet head.
In another specific embodiment of the present invention, described receiving terminal node carries out the adjustment of duty ratio self adaptation and refers to the result of estimating according to node transmission delay and energy consumption, in the time that transmission load is higher, duty ratio is multiplied, in the time of underload, duty ratio is reduced by half.
The present invention is owing to having adopted said structure, compared with prior art, the beneficial effect having is: by increasing, node motion is estimated and self adaptation adjustment makes network all have higher efficiency in the static and mobile context of node, the movement velocity of node is assessed in its variation according to received signal strength, corresponding adjustment synchronizing frequency, adds the speed of new bunch in order to improve node; On the other hand, reasonable estimation time delay and energy consumption, dynamically adjust duty ratio, in guaranteeing reasonable energy consumption, further reduces transmission delay; Controlling cost of introducing is very little, is easy to realize.
Accompanying drawing explanation
Fig. 1 is intercepting, sleeping and weighing the synchronous schematic diagram that is related in MAC agreement.
Fig. 2 is the schematic diagram that adds mobile message after original SYNC packet.
Fig. 3 is that node is at the schematic diagram that receives self adaptation adjustment synchronizing frequency after Mobility information.
Fig. 4 is the schematic diagram that adjacent node uses the timetable after duty ratio multiplication to communicate
Embodiment
In order to make the public can fully understand technical spirit of the present invention and beneficial effect; applicant will describe in detail the specific embodiment of the present invention below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, anyly changes in the form rather than substance and all should be considered as protection scope of the present invention according to the present invention design.
Refer to Fig. 1, a kind of media access control (MAC) method applicable of mobile node adaptation, described node is periodically slept, is intercepted and synchronously.Node carries out data communication between listen period; Between sleep period, enter sleep state to reduce power consumption, and by adopting synchronization mechanism, make to form between node the consistent sleep scheduling of intercepting; Node, between sync period, carries out self adaptation adjustment, specifically comprises the steps:
Step 1: according to the translational speed of the variation assessment node of RSSI value;
Step 2: the frequency synchronous according to the translational speed adjustment of the node being drawn by step 1;
Step 3: node transmission delay and energy consumption are estimated at transmitting terminal;
Step 4: receiving terminal node carries out the adjustment of duty ratio self adaptation.
Wherein, the translational speed that node is assessed in the variation according to RSSI value described in step 1 refers to that the variation of RSSI value is faster, and node motion is faster; If there are multiple RSSI values, get maximum RSSI changing value, estimate thus whether node moves and mobile speed.
Refer to Fig. 2 and in conjunction with Fig. 3, the process of the translational speed according to node described in step 2 being adjusted to synchronous frequency describes.Node, first according to the situation of change of RSSI value, generates Mobility field.In the time sending SYNC packet, be after original SYNC packet (Original SYNC), to add the Mobility information relevant to node motion (receiving the change information of RSSI value), the adjustment so that adjacent node is correlated with.Concrete steps are: first judge whether to exist Initial R SSI value, if do not exist, record current RSSI value; If exist, poor with Initial R SSI value; The difference of twice RSSI value and RSSI threshold value are compared, estimate the speed of node motion, generate Mobility field according to this result, in order to characterize mobile speed; Repeating step 1 when node is received RSSI value; Node by this Mobility information with SYNC Packet Generation, the receiving node information adjustment of being correlated with accordingly: in the situation that node self is moved, node towards periphery node sends Mobility information, around node improves synchronizing frequency according to this information, reduces the speed that this node adds new bunch; In the situation that node is moved around, node equally towards periphery node sends Mobility information, and around node is accelerated synchronizing frequency.In the time that all nodes are all static, the RSSI value while receiving SYNC packet changes little, and heavy synchronous duration is constant, now weighs with fixing that to synchronize the performance difference of duration little; When node is during in mobile status, set up the synchronous time if start at (0, T
g) on be uniformly distributed, node adds the average retardation of new bunch to be:
Wherein, T
gfor cycle duration, T
syncfor synchronous duration, T
d_newclusterfor node adds the average retardation of new bunch, from formula (1), the present embodiment has significantly promoted the speed that mobile node adds new bunch, the node especially moving for higher rate, and it adds the time delay of new bunch obviously to diminish.
In actual moving process, inter-node communication speed may change, and whole network delay and energy consumption be corresponding change also.Internodal transmission delay when reducing high-speed communication, carries out node transmission delay and energy consumption is estimated at transmitting terminal, and receiving terminal node carries out the adjustment of duty ratio self adaptation.In the present embodiment, at transmitting terminal, node transmission delay and energy consumption estimation are referred to entering transmit queue with packet is characterized single-hop time delay approx to successfully sending the required time, simultaneously, read node energy consumption relevant information, directly obtain the energy consumption of node, the packet amount of upgrading average delay in this cycle, energy consumption and receiving with this; Node sends these data with data packet head, receiving terminal node carries out the adjustment of duty ratio self adaptation and refers to the result of estimating according to node transmission delay and energy consumption, in the time that transmission load is higher, duty ratio is multiplied, and when underload, duty ratio is reduced by half.As shown in Figure 4, if receiving terminal only increases duty ratio doubly or reduces by half, in adjacent node, in the time that transmitting terminal transmits, receiving terminal will be all the time in listening state, while therefore using different time table, can keep proper communication, without introducing other controls or synchronization mechanism.This method is controlled cost less, is easy to realize.
Claims (5)
1. the media access control (MAC) method applicable of a mobile node adaptation, described node is periodically slept, is intercepted and synchronously, node carries out data communication between listen period, enters sleep state to reduce power consumption between sleep period, and by adopting synchronization mechanism, make to form between node the consistent sleep scheduling of intercepting, it is characterized in that, node, between sync period, carries out self adaptation adjustment, specifically comprise the steps: step 1, according to the translational speed of the variation assessment node of RSSI value; Step 2, the frequency synchronous according to the translational speed adjustment of the node being drawn by step 1; Step 3, estimates node transmission delay and energy consumption at transmitting terminal; Step 4, receiving terminal node carries out the adjustment of duty ratio self adaptation.
2. the media access control (MAC) method applicable of a kind of mobile node adaptation according to claim 1, the translational speed that node is assessed in the variation according to RSSI value described in it is characterized in that refers to that the variation of RSSI value is faster, node motion is faster; If there are multiple RSSI values, get maximum RSSI changing value, estimate thus whether node moves and mobile speed.
3. the media access control (MAC) method applicable of a kind of mobile node adaptation according to claim 1, it is characterized in that the described frequency synchronous according to the translational speed adjustment of node, refer to and first judge whether to exist Initial R SSI value, if do not exist, record current RSSI value; If exist, poor with Initial R SSI value, RSSI changing value and pre-set RSSI threshold value are compared, estimate the speed of node motion, and generate a Mobility field in order to characterize mobile speed, send after being attached to SYNC packet: in the situation that node self is moved, node towards periphery node sends Mobility information, around node improves synchronizing frequency according to this information, reduces the speed that this node adds new bunch; In the situation that node is moved around, node equally towards periphery node sends Mobility information, and around node is accelerated synchronizing frequency.
4. the media access control (MAC) method applicable of a kind of mobile node adaptation according to claim 1, it is characterized in that described at transmitting terminal, node transmission delay and energy consumption estimation being referred to entering transmit queue with packet is characterized single-hop time delay approx to successfully sending the required time, simultaneously, read node energy consumption relevant information, the packet amount of upgrading average delay in this cycle, energy consumption and receiving with this, node sends these data with data packet head.
5. the media access control (MAC) method applicable of a kind of mobile node adaptation according to claim 1, it is characterized in that described receiving terminal node carries out the adjustment of duty ratio self adaptation and refers to the result of estimating according to node transmission delay and energy consumption, in the time that transmission load is higher, duty ratio is multiplied, in the time of underload, duty ratio is reduced by half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410063575.8A CN103813363B (en) | 2014-02-26 | 2014-02-26 | Method for self-adaption media access control of mobile nodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410063575.8A CN103813363B (en) | 2014-02-26 | 2014-02-26 | Method for self-adaption media access control of mobile nodes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103813363A true CN103813363A (en) | 2014-05-21 |
| CN103813363B CN103813363B (en) | 2017-02-22 |
Family
ID=50709452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410063575.8A Active CN103813363B (en) | 2014-02-26 | 2014-02-26 | Method for self-adaption media access control of mobile nodes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103813363B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636132A (en) * | 2015-12-30 | 2016-06-01 | 深圳市金立通信设备有限公司 | Configuration method and system of wireless access point, base station, and user terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296249A (en) * | 2008-04-03 | 2008-10-29 | 东南大学 | Media access control method for wireless sensor network |
| EP1994689A2 (en) * | 2006-03-06 | 2008-11-26 | Cisco Technology, Inc. | Dynamic modification of contention-based transmission control parameters achieving load balancing scheme in wireless mesh networks |
| CN102883314A (en) * | 2012-09-20 | 2013-01-16 | 桂林电子科技大学 | Defense method for low-rate dormancy refusal attack of WPAN beacon broadcast |
| CN103052131A (en) * | 2013-01-04 | 2013-04-17 | 无锡儒安科技有限公司 | Energy consumption control method under delay constraint in wireless sensor network |
-
2014
- 2014-02-26 CN CN201410063575.8A patent/CN103813363B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1994689A2 (en) * | 2006-03-06 | 2008-11-26 | Cisco Technology, Inc. | Dynamic modification of contention-based transmission control parameters achieving load balancing scheme in wireless mesh networks |
| CN101296249A (en) * | 2008-04-03 | 2008-10-29 | 东南大学 | Media access control method for wireless sensor network |
| CN102883314A (en) * | 2012-09-20 | 2013-01-16 | 桂林电子科技大学 | Defense method for low-rate dormancy refusal attack of WPAN beacon broadcast |
| CN103052131A (en) * | 2013-01-04 | 2013-04-17 | 无锡儒安科技有限公司 | Energy consumption control method under delay constraint in wireless sensor network |
Non-Patent Citations (1)
| Title |
|---|
| 杨浩，李向阳: "异步网络下占空比的自适应协同调节", 《杭州电子科技大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105636132A (en) * | 2015-12-30 | 2016-06-01 | 深圳市金立通信设备有限公司 | Configuration method and system of wireless access point, base station, and user terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103813363B (en) | 2017-02-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tsao et al. | A survey of energy efficient MAC protocols for IEEE 802.11 WLAN | |
| EP2304845B1 (en) | Systems and methods for reducing power consumption in wireless devices | |
| US20100278065A1 (en) | Traffic Load Estimation for Access Point Functionality Enabled Mobile Devices | |
| CN106162844A (en) | Implementation method based on the MAC protocol for wireless sensor networks of LoRa | |
| CN101237640A (en) | Dormancy mode control for real time service in broadband wireless access communication system | |
| JP2009518967A (en) | Method and apparatus for optimal ATIM size setup for 802.11 network in ad hoc mode | |
| US11218961B2 (en) | Power saving for wireless device | |
| KR20140071520A (en) | Duty cycle control method and apparatus to mitigate latency for duty cycle based wireless low-power MAC | |
| CN109792688A (en) | Manage the sleep cycle in wireless communication system | |
| Lähetkangas et al. | On the flexible 5G dense deployment air interface for mobile broadband | |
| EP1604491B1 (en) | Method and network for scheduling service periods in a wireless local area network (WLAN) | |
| US20110158115A1 (en) | Power Efficiency and Packet Delivery Ratio Through Micro Rate Control at Access Point Functionality Enabled Devices | |
| CN105939531B (en) | Apparatus and method for power saving in channel hopping wireless networks | |
| Qin et al. | Cross-interface scheduling toward energy-efficient device-to-gateway communications in IoT | |
| CN103220775A (en) | Method, device and system for achieving data synchronization | |
| Zheng et al. | Energy-efficient analysis of an IEEE 802.11 PCF MAC protocol based on WLAN | |
| CN102378285A (en) | Method for solving packet space transmission problem of multi-channel wireless sensor network | |
| KR20130126403A (en) | Method and apparatus of drx reconfiguration considering packet inter arrival time | |
| CN103813363A (en) | Method for self-adaption media access control of mobile nodes | |
| Hisham et al. | Energy efficient scheduling in local area networks | |
| Bernardo et al. | A MAC protocol for mobile wireless sensor networks with bursty traffic | |
| Enayet et al. | PowerNap: a power-aware distributed Wi-Fi access point scheduling algorithm | |
| Nguyen et al. | Extensions of the ieee802. 15.4 protocol for ultra-low energy real-time communication | |
| Xia et al. | COPESM-MAC: A contention-based medium access protocol using parallel reservation and sleep mode for underwater acoustic sensor networks | |
| Parzysz et al. | Drastic energy reduction with gDTX in low cost 5G networks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |