CN100505652C - Multi-channel communication method in domestic wireless subnetwork - Google Patents
Multi-channel communication method in domestic wireless subnetwork Download PDFInfo
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- CN100505652C CN100505652C CNB031350569A CN03135056A CN100505652C CN 100505652 C CN100505652 C CN 100505652C CN B031350569 A CNB031350569 A CN B031350569A CN 03135056 A CN03135056 A CN 03135056A CN 100505652 C CN100505652 C CN 100505652C
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Abstract
The invention comprises wireless transmitting module and wireless receiving module. The transmitting module executes implements information source coding, modulating and transmitting radio frequency signal. The receiving module implements receiving radio frequency signal, demodulating and decoding etc. multiple wireless transmitting and receiving modules work at same time. Frequency shift keying method is utilized for each wireless transmitting and receiving module, which works at a central carrier frequency point, and bandwidth B of working channel is narrowband. All modules can work at multiple fixed carrier frequency points with bandwidth B. Microprocessor controller generates and receives data information packet and control command information packet, builds and selects channel respectively. The invention provides multiple channels communication method in short distance in high efficiency, having good operating condition and preventing radiofrequency interference.
Description
Technical field
The invention belongs to technical field of domestic networks, more specifically to the improvement of the multichannel means of communication in the family wireless subnet.
Background technology
Wireless sub network is a subnet in the domestic. applications network.Wireless sub network comprises a plurality of wireless modules.In wireless sub network, exchange control command and data message by wireless telecommunications between these modules.Wireless telecommunications between the module are operated on the fixing frequency band, and this frequency band is called a channel.
In general, comprise wireless module and wireless sub network control terminal in the family wireless subnet.There are wireless telecommunications simultaneously between the module or between module and the wireless sub network control terminal.The topological form of family wireless subnet has two kinds: star topology and equity topology.
The family wireless subnet is new results.Based on this patent (technical research), current family wireless subnet is operated on the fixing wireless channel, promptly on the Gu Ding frequency band.
The same with most of short-distance radio network, the family wireless subnet is to be provided with in the confined space.In this limited space, exist more than one wireless network.If all wireless networks only are operated in a very narrow frequency band, the network service meeting produces serious radio frequency interference, even at all can't normal communication.
Simultaneously, the wireless medium environment is also very complicated.One group of wireless module may be good a specific band operation, but can not well work at other frequency band.Adopt alternative channel can guarantee normal work.Therefore, the multichannel mechanics of communication is just very necessary for wireless sub network.
Present patent application describes the course of work of multichannel communication in the wireless sub network in detail.
Summary of the invention
Purpose of the present invention just is to provide the multichannel means of communication in a kind of family wireless subnet, sets up a short-distance radio network efficiently, introduces the arrowband communication of multiplex's working frequency in family expenses wireless sub network or wireless family automation and control network; Make the household radio subnet reach good working order, transmitter module and receiver module can be selected the good operation frequency band, avoid the more serious radio frequency interference of interchannel.
In order to achieve the above object, the present invention includes by many wireless transmitter modules and realize information source coding, modulation and emission of radio frequency signals step respectively and realize respectively by many wireless receiving modules that radiofrequency signal receives, separates being in harmonious proportion step such as decoding.It is further comprising the steps of:
(1) make each wireless transmitter module and wireless receiving module all adopt the modulation of frequency keying method, demodulation respectively;
(2) each wireless transmitter module and wireless receiving module all are operated on the fixed center carrier frequency point of a plurality of working channels, its bandwidth is arrowband B, between adjacent two carrier frequency points enough wide fixed intervals is arranged;
(3) adopt following substep to select working channel:
When (1) each wireless transmitter module and wireless receiving module are worked, at first move scanning imaging system, scan each channel one by one, measure the power of received signal;
(2) if the power of the received signal of this channel is higher than preset threshold, physical layer can report that this channel is in " work " state;
(3) if the power of the received signal of this channel is lower than preset threshold, physical layer can report that this channel is in " leaving unused " state;
(4) scanning has moved, and wireless transmitter module and wireless receiving module select the channel of " leaving unused " as the initialization channel;
(5) this wireless transmitter module and wireless receiving module send to other transceiver with the information of selective channel, Centroid in the family wireless subnet, simultaneously, Centroid transmitting channel select command and require wireless transmitter module and wireless receiving module is operated in selected channel;
(6) if the power of received signal well below threshold value, receiver module sends the change order request communication channel to transmitter module.
In the family expenses wireless sub network, each wireless transmitter module and wireless receiving module all are narrowband modulation systems.It is operated in a center carrier frequencies point f, and the work narrow band bandwidth is B.Each work narrow band bandwidth is called as the working channel of a household radio subnet.
Each wireless receiving module can be operated in a plurality of fixing carrier frequencies, for example: f
0, f
1, f
2F
n, f
N+1, f
N+2The bandwidth of each carrier wave still is B.Therefore, wireless transmitter module in the household radio subnet and wireless receiving module can be operated in many radio-frequency channels.Generally speaking, the fixed interval in the household radio subnet between two rf frequency points, for the interference between the minimum channel, space requirement is enough wide.
Each wireless transmitter module and wireless receiving module all produce respectively and receiving data information bag and control command information bag with microprocessor controller, set up and change the working channel of wireless transmitter module and wireless receiving module.
Wireless transmitter module and wireless receiving module comprise emission (TX) and receive (RX) passage.Mac controller (microprocessor controller) produces and receiving data information bag and control command information bag.The TX passage mainly comprises the RF part of transmitter information source code, modulation system and emission.Mac controller transmitting channel control command, the working channel of foundation and change wireless transmitter module and wireless receiving module.At the RX passage, radio frequency part is the RF part of receiver.Receiver is separated to be in harmonious proportion in base band and is encoded.On the RX path, exist energy to survey.
The energy probe value of received signal (the Energy Detection is called for short ED) is sent to mac controller as the important parameter of change working channel.
The radiofrequency signal receiving step of each wireless receiving module all carries out the energy measuring of received signal simultaneously or uses the CSMA/CA algorithm to estimate the state of each channel data transmission, testing result or estimation result send to microprocessor controller as the important parameter of change working channel, and microprocessor controller is selected desirable working channel on this basis.
For each wireless transmitter module and wireless receiving module, channel is selected all based on following two aspects: use the CSMA/CA algorithm to estimate the state of each channel data transmission, perhaps, make wireless transmitter module and wireless receiving module in the wireless sub network select desirable working channel based on channel quality estimation program.
Purpose of the present invention comes to this and finishes.
The present invention is introduced in the multiplex (MUX) in the wireless sub network in the domestic. applications network as channel; And based on the requirement of subnet, every wireless transmitter module and wireless receiving module can be operated in a plurality of desirable channels; And Channel Transmission state and quality are estimated to be applied in the subnet; Make each module in the household radio subnet that program or the algorithm of selecting working channel be arranged.
Therefore, the present invention has improved the efficient of work letter band.Wireless transmitter module and wireless receiving module not only can be operated in narrow band channel, also can select a plurality of work letter bands.Therefore, the wireless module real work is on accurate broadband.Based on many communication channels, can make up star topology, peer to peer topology even AD-HOC network in the household radio subnet.Multichannel of the present invention has improved the efficient of subnet, has reduced the possibility that communication gets clogged and disturbs.Multichannel communication can satisfy the complexity of wireless medium.Wireless module in the complicated wireless medium can be selected best operating frequency channel, has improved data transmission bauds and reliability greatly.The present invention can be widely used in the family wireless subnet.
Description of drawings
Fig. 1 is a fundamental diagram of the present invention.
Fig. 2 is the block diagram of fundamental diagram of the present invention.
Embodiment
The multichannel means of communication in 1. 1 kinds of family wireless subnets of embodiment are as Fig. 1～shown in Figure 2.It comprises the information source coding 1, modulation 2 and emission of radio frequency signals 3 steps that are realized by wireless transmitter module and is received 4, separated and be in harmonious proportion step such as decoding 5 by the radiofrequency signal that wireless receiving module is realized.It can have many wireless transmitter modules and wireless receiving module to work simultaneously.Each wireless transmitter module and wireless receiving module all adopt the frequency keying modulator approach, are operated in center carrier frequencies point, a working channel bandwidth B is the arrowband.Each wireless transmitter module and wireless receiving module can be operated in a plurality of bandwidth be B the fixed carrier Frequency point for example: f
0, f
1, f
2... f
n, f
N+1, f
N+2Go up (n is a natural number), between adjacent two carrier frequency points enough wide fixed intervals are arranged.
Each wireless transmitter module and wireless receiving module all produce respectively and receiving data information bag and control command information bag with microprocessor controller 6, set up and change the working channel of wireless transmitter module and wireless receiving module.The radiofrequency signal receiving step of each wireless receiving module all carries out the energy measuring of received signal simultaneously or uses the CSMA/CA algorithm to estimate the state of each channel data transmission, testing result or estimation result send to microprocessor controller as the important parameter of change working channel, and microprocessor controller is selected desirable working channel on this basis.
When the system of selection of working channel comprises the steps: (1) each wireless transmitter module and wireless receiving module work at least, at first move scanning imaging system, scan each channel one by one, measure the power of received signal; (2) if the power of the received signal of this channel is higher than preset threshold, physical layer can report that this channel is in " work " state; (3) if the power of the received signal of this channel is lower than preset threshold, physical layer can report that this channel is in " leaving unused " state; (4) scanning has moved, and wireless transmitter module and wireless receiving module select the channel of " leaving unused " as the initialization channel; (5) this wireless transmitter module and wireless receiving module send to other transceiver with the information of selective channel, the control terminal in the family wireless subnet particularly, simultaneously, control terminal transmitting channel select command and require wireless transmitter module and wireless receiving module is operated in selected channel; (6) if the power of received signal well below threshold value, receiver module sends the change order request communication channel to transmitter module.
Claims (3)
1. the multichannel means of communication in the family wireless subnet, comprise by many wireless transmitter modules and realize information source coding, modulation and emission of radio frequency signals step respectively and realize respectively that by many wireless receiving modules radiofrequency signal receives, separates to be in harmonious proportion and decipher step, is characterized in that it is further comprising the steps of:
(1) make each wireless transmitter module and wireless receiving module all adopt the modulation of frequency keying method, demodulation respectively;
(2) each wireless transmitter module and wireless receiving module all are operated on the fixed center carrier frequency point of a plurality of working channels, its bandwidth is arrowband B, between adjacent two carrier frequency points enough wide fixed intervals is arranged;
(3) adopt following substep to select working channel:
When (1) each wireless transmitter module and wireless receiving module are worked, at first move scanning imaging system, scan each channel one by one, measure the power of received signal;
(2) if the power of the received signal of this channel is higher than preset threshold, physical layer can report that this channel is in " work " state;
(3) if the power of the received signal of this channel is lower than preset threshold, physical layer can report that this channel is in " leaving unused " state;
(4) scanning has moved, and wireless transmitter module and wireless receiving module select the channel of " leaving unused " as the initialization channel;
(5) this wireless transmitter module and wireless receiving module send to other transceiver with the information of selective channel, Centroid in the family wireless subnet, simultaneously, Centroid transmitting channel select command and require wireless transmitter module and wireless receiving module is operated in selected channel;
(6) if the power of received signal well below threshold value, receiver module sends the change order request communication channel to transmitter module.
2. according to the multichannel means of communication in the described family wireless subnet of claim 1, it is characterized in that described each wireless transmitter module and wireless receiving module all produce respectively and receiving data information bag and control command information bag with microprocessor controller, set up and change the working channel of wireless transmitter module and wireless receiving module.
3. according to the multichannel means of communication in the described family wireless subnet of claim 2, the radiofrequency signal receiving step that it is characterized in that described each wireless receiving module all carries out the energy measuring of received signal simultaneously or uses the CSMA/CA algorithm to estimate the state of each channel data transmission, testing result or estimation result send to microprocessor controller as the important parameter of change working channel, and microprocessor controller is selected desirable working channel on this basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031350569A CN100505652C (en) | 2003-09-30 | 2003-09-30 | Multi-channel communication method in domestic wireless subnetwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031350569A CN100505652C (en) | 2003-09-30 | 2003-09-30 | Multi-channel communication method in domestic wireless subnetwork |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1529468A CN1529468A (en) | 2004-09-15 |
| CN100505652C true CN100505652C (en) | 2009-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031350569A Expired - Fee Related CN100505652C (en) | 2003-09-30 | 2003-09-30 | Multi-channel communication method in domestic wireless subnetwork |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2565662T3 (en) | 2012-08-24 | 2016-04-06 | Huawei Device Co., Ltd. | Configuration method of corresponding wireless local area network device, device and system |
| CN103916884A (en) * | 2014-03-04 | 2014-07-09 | 深圳市有方科技有限公司 | Method for multi-channel self-adaptation optimization communication in micro-power wireless network |
| CN106533495B (en) * | 2015-09-09 | 2019-02-19 | 启碁科技股份有限公司 | Wireless communication device and radio transmitting method suitable for dual band operation |
| CN105657715B (en) * | 2016-01-14 | 2019-04-09 | 珠海格力电器股份有限公司 | Transmission channel allocation method and device |
| CN109429198A (en) * | 2017-08-17 | 2019-03-05 | 北京中电和讯科技有限公司 | A kind of wireless networking controller and the wireless networking system comprising it |
| CN109348079B (en) * | 2018-10-10 | 2020-10-16 | 中国电子科技集团公司第七研究所 | One-to-many group grouping voice realization method suitable for narrow-band wireless network |
| CN110290587A (en) * | 2019-07-22 | 2019-09-27 | 深圳迈睿智能科技有限公司 | A kind of narrow frequency means of communication of multichannel and its system and lighting apparatus |
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2003
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| CN1529468A (en) | 2004-09-15 |
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