CN113744511B - Method for realizing wireless relay transmission and wireless fire alarm system - Google Patents
Method for realizing wireless relay transmission and wireless fire alarm system Download PDFInfo
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- CN113744511B CN113744511B CN202111251050.3A CN202111251050A CN113744511B CN 113744511 B CN113744511 B CN 113744511B CN 202111251050 A CN202111251050 A CN 202111251050A CN 113744511 B CN113744511 B CN 113744511B
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/009—Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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- 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
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Abstract
The invention provides a method for realizing wireless relay transmission and a wireless fire alarm system. The method for realizing wireless relay transmission comprises the following steps: the front-end equipment and the wireless repeaters transmit information with the wireless host in at least one sub-link structure, each sub-link is arranged in a layered structure, and all the wireless repeaters adopt the same equipment list; in each sub-link, a plurality of front-end devices are uniformly arranged in each layer, wherein the front-end devices which are arranged in each layer but do not comprise the first layer transmit information with the wireless host sequentially through the corresponding wireless repeater of the previous layer, and the front-end devices arranged in the first layer directly transmit information with the wireless host; the wireless host, the wireless repeater and the front-end equipment unify time reference and synchronize the relay time on each sub-link in a mode of timing and synchronizing the time by the wireless host. The invention effectively solves the problems of the flash phenomenon and the data collision in the prior art.
Description
Technical Field
The invention relates to a method for realizing wireless relay transmission and a wireless fire alarm system, belonging to the technical field of wireless communication of fire-fighting equipment.
Background
Fire fighting equipment is deployed wirelessly in a spatially wide environment, the coverage of wireless signals is more important than bandwidth and speed, and the use of repeaters to extend the coverage of base stations is certainly a better option. In the prior art, a wireless relay mode has been used to relay and transmit a wireless signal from one relay point to the next relay point, so as to implement relaying and amplification of the signal and form a new wireless coverage area, but because the method is unreasonable, the following disadvantages still occur:
1. each relay uses the same equipment list, so that the received information is mutually forwarded, a flash phenomenon occurs, the channel duty cycle is prolonged, and the channel utilization rate is influenced;
2. the time is managed by adopting clock chips such as RTC (real time clock) and the like, and the time is fixed and can not be changed, so that the problem of data collision exists;
3. by adopting a response mode, the transmission efficiency can be reduced by relaying and sending confirmation by a receiver;
4. because the adopted repeater configurations are the same and have no definite relative position relationship, the management and the maintenance are inconvenient.
Patent CN112867094A discloses "a wireless fire alarm system with ad hoc network function and implementation method", and in this patent, there is no corresponding solution to the problem of the flash phenomenon and data collision in the prior art.
Patent CN212365147U discloses a wireless repeater and fire alarm system, which uses multiple channels, and because the information received by the repeater is mutually forwarded, a flash phenomenon still occurs, and an interference phenomenon of different frequency bands occurs.
Disclosure of Invention
The invention provides a method for realizing wireless relay transmission, and aims to solve the problems of a flash phenomenon and data collision.
The invention is implemented by the following technical scheme:
a method for realizing wireless relay transmission specifically comprises the following steps:
(1) The front-end equipment and the wireless repeaters perform information transmission with the wireless host by at least one sub-link structure, wherein in each sub-link, a plurality of wireless repeaters and a plurality of front-end equipment are arranged by a hierarchical structure, and all the wireless repeaters adopt the same equipment list;
(2) In each sub-link, a plurality of front-end devices are uniformly arranged in each layer, wherein the front-end devices which are arranged in each layer but do not comprise the first layer transmit information with the wireless host sequentially through the corresponding wireless repeater of the previous layer, and the front-end devices arranged in the first layer directly transmit information with the wireless host;
(3) The wireless host, the wireless repeater and the front-end equipment unify time reference, carry out information transmission among the wireless host, the wireless repeater and the front-end equipment under the same time reference, and synchronize the relay time on each sub-link in a mode of timing and synchronizing the time by the wireless host.
Preferably, the information transmission between two adjacent layers of wireless repeaters adopts a dynamic detection method, that is, the wireless repeaters will always monitor whether the information transmission of the previous layer is completed and judge whether to start the retransmission mechanism.
Preferably, the wireless host, the wireless repeater, and the head end device calculate and set the distance between each other by storing the transmission sensitivity (T _ RSSI) and the reception sensitivity (R _ RSSI) at the time of mutual transmission when information transmission is performed.
The invention also provides a wireless fire alarm system. In the system, a plurality of front-end devices and a plurality of wireless repeaters carry out information transmission with a wireless host in a split link mode, and on each split link, the front-end devices and the wireless repeaters carry out information transmission with the wireless host in a layered mode; the front-end equipment is used for receiving and sending fire alarm information; the wireless repeater is used for transmitting the fire alarm information acquired by the front-end equipment to the wireless host layer by layer; and the wireless host is used for receiving the fire alarm information and sending out an alarm signal.
Preferably, the wireless host synchronizes the relay time on each sub-link by timing the synchronization time.
The invention has the beneficial effects that:
1. the invention is based on a channel, and synchronizes the relay time on each link in a mode of flexibly controlling the time slot by the timing synchronization time of the host, thereby well solving the problem of data collision;
2. the relays adopt a list mode to manage whether each front-end device is transmitted with the relay of the layer or continuously transmitted to the next layer of relays, targeted transmission can be achieved, and the phenomenon of flash can not occur any more;
3. by adopting the sub-link and layering, the relative position of each relay can be well determined, and a plurality of benefits are brought to management and maintenance;
4. the transmission between relays adopts a dynamic detection method, the data transmitted to the N-2 layer relay by the N-1 layer relay can be monitored while the data is transmitted to the N-1 layer by the N layer relay, if the data is transmitted to the N-1 layer by the N layer, retransmission is cancelled, and if the data is not transmitted or not received, a retransmission mechanism is started, compared with the traditional data response mode, the mode reduces the number of data response pieces and enhances the utilization rate of a channel;
5. when each relay communicates with an adjacent relay, the transmission sensitivity (T _ RSSI) and the reception sensitivity (R _ RSSI) during mutual transmission are stored, and the distance between the two relays is comprehensively considered and set by judging the two parameters to achieve the optimal installation position.
Drawings
Fig. 1 is a device configuration diagram according to an embodiment of the present invention.
Fig. 2 is a relay structure diagram according to an embodiment of the present invention.
Detailed Description
A method for implementing wireless relay transmission adopts the device configuration shown in fig. 1 and the relay structure shown in fig. 2, and the specific implementation method is as follows:
as shown in fig. 2, the front-end device and the wireless repeaters perform information transmission with the wireless host in an 8-branch link structure, each link may be connected to a 5-layer relay, wherein in each branch link, all the wireless repeaters use the same device list;
as shown in fig. 1, in each sub-link, 2 front-end devices are arranged in each layer, wherein the front-end devices arranged in each layer but not including the first layer transmit information with the wireless host sequentially through the wireless repeater corresponding to the previous layer, and the front-end devices arranged in the first layer directly transmit information with the wireless host;
the wireless host, the wireless repeater and the front-end equipment unify a time reference, carry out information transmission among the wireless host, the wireless repeater and the front-end equipment under the same time reference, and synchronize the relay time on each sub-link in a mode of timing and synchronizing the time by the wireless host.
As shown in fig. 1, 2 front-end devices, no. 9, 002 and No. 10, 002, which are disposed on the 5 th layer, sequentially transmit information to the wireless host via the wireless repeaters 9, 202 and 10, 202 corresponding to the 4 th layer, the wireless repeaters 9, 202 and 10, 202 corresponding to the 3 rd layer, the wireless repeaters 9, 202 and 10, 202 corresponding to the 2 nd layer, and the wireless repeaters 9, 202 and 10, 202 corresponding to the 1 st layer;
2 front-end devices arranged on the layer 4, no. 7 devices 7, 002 and No. 8 devices 8, 002 sequentially transmit information through wireless repeaters 7, 202 and 8, 202 corresponding to the layer 3, wireless repeaters 7, 202 and 8, 202 corresponding to the layer 2, wireless repeaters 7, 202 and 8, 202 corresponding to the layer 1 and wireless hosts;
2 front-end devices arranged on the layer 3, namely, the device 5, the device 002 and the device 6, 002 pass through the wireless repeaters 5, 202 and 6, 202 corresponding to the layer 2 and the wireless repeaters 5, 202 and 6, 202 corresponding to the layer 1 in sequence to transmit information with the wireless host;
2 front-end devices arranged on the layer 2, namely, a device 3, a device 002 and a device 4, a device 002 transmit information with a wireless host through the wireless repeaters 3, 202 and 4, 202 corresponding to the layer 1;
set up in 2 front end equipment on 1 st layer, no. 1 equipment 1, 002 and No. 2 equipment 2, 002, direct and wireless host computer transmission information.
The information transmission between two adjacent wireless repeaters adopts a dynamic detection method, that is, the wireless repeaters always monitor whether the transmission information of the previous layer is completed and judge whether to start a retransmission mechanism. For example, while the layer 4 relay transmits data to the layer 3, the layer 3 relay monitors the data transmitted to the layer 2 relay, and if the data is transmitted from the layer 4 to the layer 3, the retransmission is cancelled, and if the data is not transmitted or not received, the retransmission mechanism is started.
When the wireless host, the wireless repeater and the front-end equipment transmit information, the distance between the wireless host, the wireless repeater and the front-end equipment is calculated and set by storing the sending sensitivity (T _ RSSI) and the receiving sensitivity (R _ RSSI) during mutual transmission, namely, the distance between a signal point and a receiving point is measured by the strength of a received signal, and then positioning calculation is carried out according to corresponding data.
Claims (4)
1. A method for realizing wireless relay transmission is characterized in that the specific method is as follows:
(1) The front-end equipment and the wireless repeaters perform information transmission with the wireless host through a plurality of sub-link structures which are connected in parallel, wherein in each sub-link, the plurality of wireless repeaters and the plurality of front-end equipment are arranged in a layered structure, and all the wireless repeaters adopt the same equipment list;
(2) In each sub-link, a plurality of front-end devices are uniformly arranged in each layer, wherein the front-end devices which are arranged in each layer but do not comprise the first layer transmit information with the wireless host sequentially through the corresponding wireless repeater of the previous layer, and the front-end devices arranged in the first layer directly transmit information with the wireless host;
(3) The wireless host, the wireless repeater and the front-end equipment unify a time reference, and information transmission is carried out among the wireless host, the wireless repeater and the front-end equipment under the same time reference; under the same time reference, the relay time on each sub-link is synchronized by adopting a mode of timing and synchronizing time by a wireless host;
the information transmission between two adjacent layers of wireless repeaters adopts a dynamic detection method: the N-layer relay transmits data to the N-1 layer, and simultaneously monitors the data transmitted by the N-1 layer relay to the N-2 layer relay, if the data is transmitted by the N-layer to the N-1 layer, the retransmission is cancelled, and if the data is not transmitted or not received, a retransmission mechanism is started;
when information is transmitted, the wireless host, the wireless repeater, and the head end device calculate and set the distance between them by storing the transmission sensitivity (T _ RSSI) and the reception sensitivity (R _ RSSI) at the time of mutual transmission.
2. The method of claim 1, wherein the method further comprises: the front-end equipment and the wireless repeaters are in eight-link structure to transmit information with the wireless host, and the plurality of wireless repeaters and the plurality of front-end equipment are arranged in five layered structures.
3. A wireless fire alerting system for implementing the method of any one of claims 1-2, wherein: the front-end equipment and the wireless repeaters transmit information with the wireless host in a split link mode, and the front-end equipment and the wireless repeaters transmit information with the wireless host in a layered mode on each split link; the front-end equipment is used for receiving and sending fire alarm information; the wireless repeater is used for transmitting the fire alarm information acquired by the front-end equipment to the wireless host layer by layer; and the wireless host is used for receiving the fire alarm information and sending out an alarm signal.
4. A wireless fire alerting system of claim 3, wherein: and the wireless host synchronizes the relay time on each branch link in a time synchronization time mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111251050.3A CN113744511B (en) | 2021-10-27 | 2021-10-27 | Method for realizing wireless relay transmission and wireless fire alarm system |
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| CN202111251050.3A CN113744511B (en) | 2021-10-27 | 2021-10-27 | Method for realizing wireless relay transmission and wireless fire alarm system |
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| CN113744511B true CN113744511B (en) | 2023-02-10 |
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| US9444587B2 (en) * | 2008-10-16 | 2016-09-13 | Qualcomm Incorporated | Incremental redundancy relays for wireless communication |
| EP2352348B1 (en) * | 2008-10-28 | 2016-12-14 | Icom Incorporated | Wireless communication system, relay system, repeater devices and synchronization method |
| CN101751761B (en) * | 2009-12-30 | 2011-08-31 | 河南新天科技股份有限公司 | Efficient wireless meter reading method for automatic network router |
| JP5612346B2 (en) * | 2010-03-31 | 2014-10-22 | 能美防災株式会社 | Disaster prevention equipment |
| CN202110646U (en) * | 2011-07-07 | 2012-01-11 | 杭州电子科技大学 | Cellar manhole cover remote monitoring system |
| JP6523112B2 (en) * | 2015-09-11 | 2019-05-29 | 株式会社東芝 | Communication apparatus, relay determination method and relay determination program |
| CN110487350A (en) * | 2019-08-29 | 2019-11-22 | 湖北民族大学 | A kind of mining under reservoir distribution water level monitoring and warning system and method |
| CN112261510A (en) * | 2020-09-29 | 2021-01-22 | 东北农业大学 | Transmission tower gradient monitoring, early warning and management system based on LPWAN technology |
| CN112396814B (en) * | 2020-11-26 | 2022-04-01 | 深圳市安室智能有限公司 | Alarm topology transmission method and related product |
| CN112867094B (en) * | 2020-12-31 | 2022-08-30 | 深圳市泰和安科技有限公司 | Wireless fire alarm system with ad hoc network function and implementation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102523147A (en) * | 2012-01-17 | 2012-06-27 | 杭州电子科技大学 | Communication method among intelligent fire-fighting wireless nodes |
| CN204408388U (en) * | 2015-01-13 | 2015-06-17 | 青岛昊阳网络科技有限公司 | Based on tank temperature and the intruding detection system of wireless sensor network |
| CN107172680A (en) * | 2017-07-24 | 2017-09-15 | 深圳市赋安安全系统有限公司 | A kind of wireless relay system based on cluster tree network |
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