CN107041015B - Method for avoiding network transmission data collision - Google Patents
Method for avoiding network transmission data collision Download PDFInfo
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- CN107041015B CN107041015B CN201710224734.1A CN201710224734A CN107041015B CN 107041015 B CN107041015 B CN 107041015B CN 201710224734 A CN201710224734 A CN 201710224734A CN 107041015 B CN107041015 B CN 107041015B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 12
- VYLDEYYOISNGST-UHFFFAOYSA-N bissulfosuccinimidyl suberate Chemical compound O=C1C(S(=O)(=O)O)CC(=O)N1OC(=O)CCCCCCC(=O)ON1C(=O)C(S(O)(=O)=O)CC1=O VYLDEYYOISNGST-UHFFFAOYSA-N 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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Abstract
The inventionThe method for avoiding network transmission data collision is characterized by comprising the following steps: a. for any data acquisition terminal, before sending data, sending a transmission time signal T for transmitting data to data receiving equipmentiWherein i is a natural number; b. the data receiving equipment is used for receiving the signals T from the data acquisition terminaliComparison is carried out at T1To TiIf the transmission time is different and the minimum two interval time is more than T in the datalenth，TlenthRepresenting the average time, T, required for data transmissionlenthL/V, where L represents average data capacity and V represents transmission rate, and the acquisition terminals immediately execute a data transmission command; c. for the transmission time TiSame or maximum interval time less than TlenthThe acquisition terminals each generate a random number △ TiThe final transmission time Ti＝Tc+Tlenth+△Ti，TcIndicating the time at which the send key was pressed. The problem that data errors are dragged to the background slowly at the same time due to data collision in centralized uploading of data of a plurality of terminals is solved, and the method has the advantages of safety and reliability in data transmission.
Description
Technical Field
The invention belongs to the field of wireless communication, and particularly relates to a method for avoiding network transmission data collision.
Background
At present, the use of WLAN (Wireless Local Area Networks) for data communication is very common, and the demand for WLAN coverage is increasing globally. The IEEE (Institute of Electrical and electronic Engineers) industry Specification 802.11 sets forth a series of standards, 802.11a/b/g/n/ac, in turn to meet the ever-increasing demands for communications.
In an OFDM (Orthogonal Frequency Division Multiplexing) system, two parts are included: physical layer preamble and data part. The physical layer preamble includes: compatible with the preamble of the traditional equipment, short training field, long training field, signaling field, etc. To reduce overhead, the IEEE 802.11 protocol defines NDP (Null data packet), which refers to a physical layer packet containing only a physical layer preamble and no data part.
The basic architecture of the wireless lan refers to a BSS (basic service set) including an AP (access point) and a plurality of STAs (Station) associated with the AP
Two BSSs are called OBSS (Overlapping basic service sets) if the operating areas of the access points in the two BSSs overlap and the used operating bands of the access points/stations are the same or overlap.
With WLAN deployment becoming more dense, collisions between BSSs become more severe, and OBSS problems become more severe.
Disclosure of Invention
The first objective of the present invention is to solve the above technical problems and provide a method for avoiding collision of network transmission data.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for avoiding network transmission data collision is characterized by comprising the following steps:
a. for any data acquisition terminal, before sending data, sending a transmission time signal T for transmitting data to data receiving equipmentiWherein i is a natural number;
b. the data receiving equipment is used for receiving the signals T from the data acquisition terminaliComparison is carried out at T1To TiIf the transmission time is different and the minimum two interval time is more than T in the datalenth，TlenthRepresenting the average time, T, required for data transmissionlenthIf L/V represents the average data capacity and V represents the transmission rate, the acquisition terminals immediately execute a data sending command;
c. for the transmission time TiSame or maximum interval time less than TlenthThen the acquisition terminals each generate a random number △ TiAs the transmission delay time, the final transmission time Ti＝Tc+Tlenth+△TiWherein, TcIndicating the time at which the send key was pressed.
Further, the △ TiShould be much greater than Tlenth。
Further, △ TiThe value range is from 1 to 5,the unit is S.
A second object of the present invention is to solve the above technical problem and provide a system for avoiding collision of network transmission data.
In order to realize the second purpose, the invention adopts the technical scheme that:
avoid net to pass data collision system, its characterized in that includes:
the data acquisition terminal equipment comprises at least two data acquisition terminal equipment; each data acquisition terminal device is provided with a random number generator;
the data receiving equipment is used for receiving data from the data acquisition terminal equipment;
and the local area network connects the data acquisition terminal equipment and the data receiving equipment in a wireless mode.
Further, the random number generated by the random number generator is limited to 1 to 5.
The two technical schemes of the invention have the following beneficial effects: the random number and delay technology is adopted, the data sending time of the data acquisition terminal is changed, the problem that data errors are dragged to the background slowly at the same time due to data collision caused by centralized uploading of a plurality of terminals is solved, and the method has the advantages of safety and reliability in data transmission.
Drawings
FIG. 1 is a schematic diagram of a system for avoiding network-borne data collision according to the present invention;
fig. 2 is a schematic diagram of the working steps of the system for avoiding network transmission data collision according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
Referring to fig. 1, the system for avoiding network transmission data collision, the data acquisition terminal device, includes at least two; each data acquisition terminal device is provided with a random number generator (not shown); the data receiving equipment is used for receiving data from the data acquisition terminal equipment; the local area network comprises a wireless module and a wireless transceiver, and the data acquisition terminal equipment and the data receiving equipment are connected in a wireless mode.
The control method of the system for avoiding network transmission data collision comprises the following steps:
a. for any data acquisition terminal, before sending data, sending a transmission time signal T for transmitting data to data receiving equipmentiWherein i is a natural number;
b. the data receiving equipment is used for receiving the signals T from the data acquisition terminaliComparison is carried out at T1To TiIf the transmission time is different and the minimum two interval time is more than T in the datalenth，TlenthRepresenting the average time, T, required for data transmissionlenthIf L/V represents the average data capacity and V represents the transmission rate, the acquisition terminals immediately execute a data sending command;
c. for the transmission time TiSame or maximum interval time less than TlenthThen the acquisition terminals each generate a random number △ TiAs the transmission delay time, the final transmission time Ti＝Tc+Tlenth+△TiWherein, TcIndicating the time at which the send key was pressed.
Further, the △ TiShould be much greater than Tlenth。
Further, △ TiThe value ranges from 1 to 5 in units of S. Of course, this range may be set to other values, such as 1 to 20, depending on the actual data capacity.
For example, in one system,the data transmission system comprises 5 data acquisition terminals, a data receiving device, 5 data acquisition terminals, wherein the capacity of single average transmission of the 5 data acquisition terminals is 10M, the speed of network wireless transmission is 40M/S, the time required by single transmission is 1/4S, if the minimum interval of the data transmission time of the 5 data acquisition terminals is more than 1/4S, the 5 data acquisition terminals immediately execute a data transmission command, if the maximum interval of the data transmission time of the 5 data acquisition terminals is less than 1/4S, the 5 data acquisition terminals generate a random number between 1 and 5 as the delay time of transmission, if the time of pressing a transmission key is 2 ' 10 ' 32 ' and the random number is 3, the final transmission time is Ti＝Tc+Tlenth+△Ti＝2＇10＇32＂+3s+1/4s。
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. It will be apparent to those skilled in the art that a number of simple derivations or substitutions can be made without departing from the inventive concept.
Claims (3)
1. The method for avoiding network transmission data collision is characterized by comprising the following steps:
a. for any data acquisition terminal, before sending data, sending a transmission time signal T for transmitting data to data receiving equipmentiWherein i is a natural number;
b. the data receiving equipment is used for receiving the signals T from the data acquisition terminaliComparison is carried out at T1To TiIf the transmission time is different and the minimum two interval time is more than T in the datalenth，TlenthRepresenting the average time, T, required for data transmissionlenthIf L/V represents the average data capacity and V represents the transmission rate, the acquisition terminals immediately execute a data sending command;
c. for the transmission time TiSame or maximum interval time less than TlenthThen the acquisition terminals each generate a random number △ TiAs the transmission delay time, the final transmission time Ti＝Tc+Tlenth+△TiWherein, TcIndicating the time at which the send key was pressed.
2. The method for avoiding collisions of networked data according to claim 1, wherein said △ T is set toiShould be much greater than Tlenth。
3. The method for avoiding collisions of networked data according to claim 2, wherein △ TiThe value ranges from 1 to 5 in units of S.
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| CN201710224734.1A CN107041015B (en) | 2017-04-07 | 2017-04-07 | Method for avoiding network transmission data collision |
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| CN201710224734.1A CN107041015B (en) | 2017-04-07 | 2017-04-07 | Method for avoiding network transmission data collision |
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| CN107041015B true CN107041015B (en) | 2020-01-10 |
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| CN111478933A (en) * | 2019-01-24 | 2020-07-31 | 北京沃东天骏信息技术有限公司 | Application cluster data preloading method, device, storage medium, equipment and system |
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| CN1405672A (en) * | 2001-09-07 | 2003-03-26 | 日本电气株式会社 | Random number generating method and random number generating device |
| WO2012083741A1 (en) * | 2010-12-22 | 2012-06-28 | 中兴通讯股份有限公司 | Random access method and terminal |
| CN103209438A (en) * | 2013-04-24 | 2013-07-17 | 大唐移动通信设备有限公司 | Method and device for controlling load of radio network controller (RNC) |
| CN104769650A (en) * | 2012-10-18 | 2015-07-08 | 独立行政法人产业技术总合研究所 | Sensor network system |
| CN105246167A (en) * | 2014-07-11 | 2016-01-13 | 普天信息技术有限公司 | Random number generating method and random number generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8130079B2 (en) * | 2007-08-15 | 2012-03-06 | At&T Intellectual Property I, L.P. | Methods, systems, and products for discovering electronic devices |
| CN103095566B (en) * | 2013-02-20 | 2016-05-11 | 北京经纬恒润科技有限公司 | A kind of file transmitting method |
| CN103260210B (en) * | 2013-05-31 | 2019-04-26 | 北京新岸线移动多媒体技术有限公司 | Method for building up, system and the device of multihop routing in a kind of multihop network |
| CN103902941B (en) * | 2014-01-23 | 2016-11-02 | 电子科技大学 | A kind of multi-label anti-collision method mapped based on continuous collision bit |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405672A (en) * | 2001-09-07 | 2003-03-26 | 日本电气株式会社 | Random number generating method and random number generating device |
| WO2012083741A1 (en) * | 2010-12-22 | 2012-06-28 | 中兴通讯股份有限公司 | Random access method and terminal |
| CN104769650A (en) * | 2012-10-18 | 2015-07-08 | 独立行政法人产业技术总合研究所 | Sensor network system |
| CN103209438A (en) * | 2013-04-24 | 2013-07-17 | 大唐移动通信设备有限公司 | Method and device for controlling load of radio network controller (RNC) |
| CN105246167A (en) * | 2014-07-11 | 2016-01-13 | 普天信息技术有限公司 | Random number generating method and random number generator |
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