CN103220698B - Asynchronization process method, Apparatus and system between a kind of node based on wireless network - Google Patents
Asynchronization process method, Apparatus and system between a kind of node based on wireless network Download PDFInfo
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Abstract
The present invention proposes method, the Apparatus and system of step-out process between a kind of node based on wireless network, be applied to local end node to end node is completed valid data send after step-out process, comprise: local end node obtains respectively when completing valid data and send and the intensity of Received signal strength afterwards, and obtains both signal strength difference; Compare according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state; When judging that end node is in data sends state, described local end node remains in data receiving state, and the described data sent by end node received are resolved, when judging that end node is not in data sends state, local end node should transfer data to and send state, sends valid data. Avoid owing to waiting as long for or sending the not high phenomenon of the system efficiency brought of conflict between node, it is to increase the working efficiency of system.
Description
Technical field
The present invention relates to communication transfer field, particularly relate to asynchronization process method, Apparatus and system between a kind of node based on wireless network.
Background technology
Along with the continuous progress of the communication technology, radio communication provides a convenient, network communication services efficiently, and corresponding data service have also been obtained develop rapidly. The method of synchronization of existing radio communication system realizes based on global positioning system (GPS). Each node in system carries out receipt transmitting-receiving operation according to the clock in the whole network network. If can not be synchronous between node, then the signal of up-downgoing just can not send simultaneously and receive and also just result in the signal disturbing between node, and the consequence thereupon brought is exactly that various business cannot normally carry out.
In synchronous radio communication system, even if adopting global positioning system (GPS), between node, the situation of step-out also is difficult to avoid, once occur that step-out does not detect or do not have effective method to make it recover normal, will cause network performance severe exacerbation.
In the fast wireless network system in chainlike distribution communicates, in system between each node during mutual data transmission so that it is Base Band Unit carries out allowing physical layer do corresponding transmission processing to realize the object of radio communication after group frame processes. Owing to this ground node does not know to be sent by end node the length of data within the system, so will cause, shift to an earlier date in because of transmission node or lag behind real receiving slot and proceed to transmission state, result produces the situation of conflict or waits a data frame length time the longest, thus reduces system efficiency.
So, it is necessary to this problem is proposed a kind of solution simple, effective so that between node when step-out, can adjust quickly and accurately, ensure the working efficiency of radio communication system.
Summary of the invention
The main purpose of the present invention is to provide method, the Apparatus and system of step-out process between the node based on wireless network, to solve prior art Problems existing, wherein: based on wireless network node between step-out process method, be applied to local end node to end node is completed valid data send after step-out treating processes, comprising:
Local end node obtains respectively when completing valid data and send and the intensity of Received signal strength afterwards, and obtains both signal strength difference;
Compare according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state;
When judging that end node is in data sends state, described local end node remains in data receiving state, and the described data sent by end node received is resolved.
Further, described local end node obtains the step of the signal strength difference of channel, comprises further:
Local end node, according to the frame length information of the described valid data sent, obtains sampling point quantity;
Local end node sends valid data according to described sampling point quantity to end node, and local end node is set to data receiving state afterwards, and detects current demand signal intensity level as initial signal intensity value using scheduled duration;
Local end node, when data receiving state, detects current demand signal intensity level according to scheduled duration and compares with described initial signal intensity value respectively, obtain some described signal strength difference.
Further, according to the step that described signal strength difference and signal strength threshold value compare, comprising:
If when described signal strength difference is greater than predetermined threshold value, judge described end node is being sent data, it is in data and sends state;
If when described signal strength difference is less than predetermined threshold value, judges described end node not to be sent data, it is in data receiving state.
Further, to the step that the described data sent by end node received are resolved, comprising:
The frame head of the described data sent by end node received is resolved by described local end node, so that it is determined that whether described local end node can carry out valid data next time sends;
If parse for frame head is correct, then described local end node remains in data receiving state, and obtain described frame length information end node being sent the frame head of data and comprising, described frame is received according to described frame length information, after finishing receiving, described local end node is set to data and sends state, carries out valid data next time and sends;
If it is incorrect or do not search the same step sequence of described frame head to resolve described frame head, then described local end node remains in data receiving state, and constantly obtain signal strength difference, described signal strength difference and described predetermined threshold value are compared, when described signal strength difference is less than described predetermined threshold value, described local end node is set to data and sends state, resends described valid data.
Further, the step that described signal strength difference and described predetermined threshold value compare, comprising:
Compare according to described signal strength difference and described predetermined threshold value, so that it is determined that described to whether end node is carrying out data transmission;
If described signal strength difference is greater than described predetermined threshold value, then described to end node transmission data state, described local end node continues to remain in described data receiving state;
If described signal strength difference is less than described predetermined threshold value, then described end node is no longer sent data, after this locality end node is set to data transmission state, resend described valid data.
Further, according to the step that described signal strength difference and predetermined threshold value compare, comprising:
If described signal strength difference is greater than pre-set limit, judge described end node is being sent data, it is in data and sends state;
If described signal strength difference is less than predetermined threshold value, described predetermined threshold value is reduced by predetermined amplitude, predetermined threshold value after described signal strength values and reduction is compared, if described signal strength difference is still less than predetermined threshold value, judge described end node not to be sent data, it is in data receiving state.
According to an aspect of the present invention, additionally provide the local device of step-out process between a kind of node based on wireless network, for end node is completed valid data send after step-out process, comprise: radio frequency unit and Base-Band Processing unit, wherein, described radio frequency unit, comprises further:
Signal strength detection module, for receiving the control of Base-Band Processing unit, obtains when completing valid data and send and the strength of signal received afterwards respectively;
Radio receiving transmitting module, sends valid data for receiving the control of Base-Band Processing unit and/or receives the data that end node sends;
Described Base-Band Processing unit, comprises further:
Opposite end judges module, for calculating signal strength difference according to the described strength of signal received, and compares according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state;
Local configuration module, for when judging that end node is in data sends state, making described radio receiving transmitting module remain in data receiving state, and notifies to receive control module;
Described reception control module, receives the described data that sent by end node for controlling described radio receiving transmitting module and resolves.
Further, described opposite end judges module, and the frame length information according to the valid data sent that is further used for obtains the sampling point quantity sent, and notifies described radio receiving transmitting module; When described local configuration module makes described radio receiving transmitting module be in data receiving state, the signal strength values receiving the acquisition of described signal strength detection module is as initial signal intensity value, and the current demand signal intensity level constantly obtained with described signal strength detection module compares respectively, obtains some described signal strength difference;
Described local configuration module, judges the notice of module for receiving opposite end, described radio receiving transmitting module is set to data and sends state or data receiving state;
Described radio receiving transmitting module, sends valid data for the sampling point quantity obtained according to described Base-Band Processing unit to end node.
Further, described opposite end judges module, also for when described signal strength difference is greater than predetermined threshold value, judges described end node is being sent data, is in data and sends state, and notify described local configuration module; When described signal strength difference is less than predetermined threshold value, judges described end node not to be sent data, it is in data receiving state, and notify described local configuration module.
Comprise further, described reception control module, also for the described frame head to the data that end node sends is resolved, so that it is determined that whether described Base-Band Processing unit can carry out valid data next time send, when the described frame head of parsing is correct, then described radio receiving transmitting module remains in data receiving state, and obtain the frame length information that described frame head comprises, described frame is received according to described frame length information, after finishing receiving, described radio receiving transmitting module is set to data and sends state, carries out valid data next time and sends;
Described local configuration module, sends state for making described radio receiving transmitting module be placed in data according to the notice of described reception control module;
Described transmission control module, for controlling, according to the notice receiving control module, the transmission that described radio receiving transmitting module carries out valid data next time.
Further, comprising:
Described reception control module, for the described frame head to the data that end node sends is resolved, so that it is determined that described Base-Band Processing unit is the need of resending valid data, when the described frame head of parsing is incorrect or does not search the same step sequence of described frame head, described radio receiving transmitting module remains in data receiving state, according to the signal strength difference reported with preset duration signal strength detection module, described signal strength difference is sent to opposite end and judges module;
Described opposite end judges module, for comparing according to described signal strength difference and predetermined threshold value, so that it is determined that described radio receiving transmitting module is the need of resending described valid data; When described signal strength difference is less than described predetermined threshold value, notify described local configuration module;
Described local configuration module, for when described opposite end judges that module judges that making described radio receiving transmitting module be placed in data when end node is in data receiving state sends state;
When described opposite end, described transmission control module, for judging that module judges that end node is in radio receiving transmitting module described in data receiving state control resends described valid data.
Further, described opposite end judges module, also for being greater than predetermined threshold value when described signal strength difference, judge that described opposite end node data sends state, so that it is determined that to whether end node is in data receiving state, and when described signal strength difference is less than predetermined threshold value, described predetermined threshold value is reduced by predetermined amplitude, predetermined threshold value after described signal strength difference and reduction is compared, when described signal strength difference is still less than predetermined threshold value, judge described end node not to be sent data.
The present invention on the other hand, also provides the system of step-out process between the node based on wireless network, be applied to local end node to end node is completed valid data send after step-out treating processes, comprising:
Local device as above; And opposite end device, comprise: radio frequency unit and Base-Band Processing unit, wherein, described Base-Band Processing unit, it is further used for making described radio frequency unit be placed in data receiving state, and control the valid data that described radio frequency unit receives described local device and sends, and make described radio frequency unit be placed in data transmission state, and control the feedback data that described radio frequency unit sends described valid data.
Compared with existing scheme, the technique effect that the present invention obtains:
1) the present invention can effectively improve and receives and dispatches the nonsynchronous problem of data in wireless communication procedure, and by the strength of signal in monitor in real time channel, current transmission state is carried out real-time analysis, avoid owing to waiting as long for or sending the not high phenomenon of the system efficiency brought of conflict between node, it is to increase the working efficiency of system.
2) asynchronization process method that the present invention proposes also significantly reduces noise to the interference receiving or sending data, it may also be useful to family can receive and dispatch information accurately fast.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to the technique means of the present invention can be better understood, and can be implemented according to the content of specification sheets, and in order to above and other objects of the present invention, feature and advantage can be become apparent, below especially exemplified by the specific embodiment of the present invention.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become clear for those of ordinary skill in the art and understand. Accompanying drawing is only for illustrating the object of preferred implementation, and does not think limitation of the present invention. And in whole accompanying drawing, represent identical parts with identical reference symbol. In the accompanying drawings:
Fig. 1 diagrammatically illustrate according to first embodiment of the invention based on wireless network node between the method flow diagram of asynchronization process method;
Fig. 2 diagrammatically illustrate according to second embodiment of the invention based on wireless network node between step-out process in the method flow diagram of resolution data;
Fig. 3 diagrammatically illustrate according to third embodiment of the invention based on wireless network node between step-out process local device structure block diagram;
Fig. 4 diagrammatically illustrate according to four embodiment of the invention based on wireless network node between step-out process system architecture diagram.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, according to the first embodiment of the present invention, it provides asynchronization process method between a kind of node based on wireless network, be applied to local end node to end node is completed valid data send after step-out treating processes, wherein, comprising:
S101, local end node obtain respectively when completing valid data and send and the intensity of Received signal strength afterwards, and obtain both signal strength difference.
Signal strength difference is obtained for local end node be illustrated as further, based on, in wireless network, local end node, according to the frame length information of the described valid data sent, obtains sampling point quantity. Local end node according to the quantity of described sampling point to the valid data that end node is sent sampling point, local end node is set to data receiving state afterwards, and detect current demand signal intensity level (i.e. RSSI with scheduled duration, ReceivedSignalStrengthIndicator strength of signal indicates), and using this value as initial signal intensity value; Local end node, when data receiving state, constantly detects current demand signal intensity level and compares with described initial signal intensity value respectively, obtain some described signal strength difference.
Difference for the strength of signal obtained is illustrated as further, local end node can be converted to sampling number according to the frame length information of the valid data to be sent, and is converted to reception state after sending valid data according to time clock when sending valid data. The signal strength values (end node sends the states before data) of local channel received by end node is initial signal intensity value, utilize this initial signal intensity value with it the follow-up signal strength values monitored compare, obtain signal strength difference. Because, local end node is when just distributing valid data, end node is not yet sent data (asynchronous data), and the current demand signal intensity level now detected represents minimum signal strength values (i.e. initial signal intensity value), compare as judgement basis according to the signal strength values of this initial signal intensity value and follow-up Real-Time Monitoring, it is possible to detect whether end node sends data. Namely, the signal strength values obtained before data owing to being sent by end node can be bigger with signal strength differences after transmission data, so, the signal strength values obtained each time all can have and changes by a relatively large margin, and such as, local end node is in receive state, the signal value received for the first time is R1, thereafter every 0.1S (assuming the time) receives strength of signal R2, R3 ... carry out mathematic interpolation with R1. This feature is utilized to judge whether end node is in transmission state. So, according to the difference of local the end node first signal strength values received when being set to data receiving state and the signal strength values being currently received, obtain the signal strength difference of described channel.
S102, compare according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state. Wherein, described predetermined threshold value is set on the basis of noise figure increases certain numerical value, the noise figure of thermonoise power, receiving apparatus equivalent noise bandwidth, noise figure and low-noise amplifier that wherein noise figure comprises under normal temperature in 1Hz bandwidth.
If when described signal strength difference is greater than predetermined threshold value, then perform step S103. When judging that end node is in data sends state, described local end node remains in data receiving state, and performs step S105.
If (signal strength values that explanation records may be the noise in the middle of channel when described signal strength difference is less than predetermined threshold value, likely cause because end node is not received data by the reason of channel, the data now end node not sent in channel), then perform step S104, perform step S106 afterwards.
Owing to deviation may occur in the setting of predetermined threshold value, such as predetermined threshold value arranges too high, also will lower than predetermined threshold value even if causing that end node is sent the signal strength values that produces of data, thus judgement mistake occurs, in order to ensure the tolerance range judged, again compare after predetermined threshold value can be revised, so, step S104 basis is improved: if when described signal strength difference is less than predetermined threshold value, then reduce described predetermined threshold value by predetermined amplitude, the predetermined threshold value after described signal strength values and reduction is compared; If described signal strength difference is still less than predetermined threshold value, then judges described end node not to be sent data, it is in data receiving state. Certainly, in order to ensure the tolerance range judged further, repeatedly can also reduce amplitude and limit the scope reducing number of times, such as make a reservation for reduce described signal strength threshold value for three times by predetermined amplitude, if reduced by three times, described signal strength difference is still less than the predetermined threshold value after reduction each time, then can accurately judge described end node not to be sent data, be in data receiving state. Certainly, the present invention does not limit the scope reducing number of times.
The step that signal strength difference and predetermined threshold value according to step S102 compare comprises:
If described signal strength difference is greater than predetermined threshold value, judge described end node is being sent data, it is in data and sends state.
If described signal strength difference is less than predetermined threshold value, described predetermined threshold value is reduced by predetermined amplitude, predetermined threshold value after described signal strength difference and reduction is compared, if described signal strength difference is still less than predetermined threshold value, judge described end node not to be sent data, it is in data receiving state.
Step S102 is illustrated further, due to end node meeting setup times time-out local in traditional scheme, now do not receive the data sent by end node or have received data but resolve the frame head mistake to the data that end node sends, then directly transfer this locality end node to data by data receiving state and send state, at this time end node may not yet being sent whole data, two nodes are all in and conflict in gap when transmission state can cause. At this moment just need to be applied to step S102 to judge. For whether the received data sent by end node are correct, just just can determine after these data need to be resolved (illustrating in detail see in Fig. 2 the 2nd embodiment).
S103, described end node is being sent data, it is being in data and sends state.
S104, described end node is not sent data, it is in data receiving state.
S105, the described data sent by end node received are resolved.
S106, this locality end node is set to transmission state.
For the method for the process of a kind of step-out described in the first embodiment, illustrating further, in the fast wireless network in chainlike distribution, between each end node, mutual data transmission is to realize for the purpose of radio communication. Such as, when local end node A is to opposite end Node B secured transmission of payload data, local end node A does corresponding transmission processing by physical layer after carrying out group frame, owing to being ready for sending in valid data process, local end joint A point can obtain the length (i.e. frame length information) sending valid data, so local end node A just according to frame length information completing to opposite end Node B can automatically transfer reception state to after valid data send, can wait that the data of opposite end Node B send.
When local end node A is in reception data state, Received signal strength intensity level (i.e. RSSI can be monitored according to scheduled duration, ReceivedSignalStrengthIndicator strength of signal indicates), owing to Node B signal strength values detected by local end node A when sending data in opposite end can be greater than when opposite end Node B does not send data the numerical value detected by local end node A. So, if recording signal strength values rangeability (signal strength difference) to be greater than preset signal strength threshold value, just represent that opposite end Node B is sending data. When again these data being resolved after the data that local end node A receives. Signal strength difference owing to recording may be the noise in the middle of channel, it is likely because end node is not received data by the reason of channel, cause local end node A to record signal strength difference and it is less than predetermined threshold value, now can learning that opposite end Node B does not send data, so local end node A just can be converted to transmission state and resend valid data to opposite end Node B.
As shown in Figure 2, according to a second embodiment of the present invention, it is proposed between the node based on wireless network, in step-out treating processes, local end node receives the method that the described data sent by end node resolve, and wherein, comprising:
The frame head of the described data sent by end node received is resolved by S201, local end node.
Correctly whether S202, the frame head determining to resolve the described data to end node transmission, so that it is determined that whether local end node can carry out valid data next time send.
If the frame head that end node sends data is correct, then perform step S203, perform step S205 afterwards.
If it is incorrect or do not search the same step sequence of described frame head to resolve the frame head that end node sends data, then performs step S204, perform step S206 afterwards. Wherein, for the same step sequence of described frame head, referring to that data can transmit a mark representing data and sending by channel when transmitting before the frame head of data, this mark is exactly the same step sequence of frame head.
When resolving the frame head mistake that end node is sent data, described signal strength difference and described predetermined threshold value are compared, to determine that local end node is the need of resending described valid data, further, if described signal strength difference is greater than described predetermined threshold value, then described being in by end node sends data state, and described local end node continues to remain in data receiving state; If described signal strength difference is less than described predetermined threshold value, then described end node is no longer sent data, after this locality end node is set to data transmission state, resend described valid data.
S203, described local end node remain in data receiving state, and obtain described frame length information end node sending the frame head of data and comprising.
S204, described local end node remain in data receiving state, and constantly obtain signal strength difference, described signal strength difference and described predetermined threshold value are compared.
S205, receiving described frame according to the described frame length information that end node sends data, after finishing receiving, described local end node is set to data and sends state, it is determined that carries out valid data next time and sends.
S206, when described signal strength difference is less than described predetermined threshold value, resend described valid data.
Do not find when the data that end node sends data resolved by local end node end node to send the frame head of data or does not search and represent the described same step sequence of frame head, local end node remains in data receiving state, wait the described transmission that end node is completed described data, just in this waiting process, local end node continues the described signal strength values of detection, and constantly calculates signal strength difference; Compare according to described signal strength difference and described predetermined threshold value, so that it is determined that described to whether end node is carrying out data transmission. When described end node is sent data time, described local end node continues to remain in data receiving state. When described end node is no longer sent data time, judge described end node to complete the transmission of opposite end node data and is switched to data receiving state.
For in traditional scheme, if when end node local in data parsing does not search the same step sequence of frame head yet or searches frame head check errors after above-mentioned data parsing processes, now cannot know that the length that end node sends data just judges that local end node does not have and end node is synchronous, so local end node now can not be converted to transmission state at once, so local end node still cannot obtain the length that end node sends data.
Local end node is before being converted to transmission state, it is still necessary to judge whether end node is sent completely by signal strength detection value. Local end node according to acquisition sampling point quantity, can be determined to send valid data to end node, and after having determined to send valid data, this locality end node be set to data receiving state. And at local end node when data receiving state, obtain signal strength difference according to the difference of local the end node first signal strength values received when being set to data receiving state and the signal strength values being currently received. Compare according to acquisition signal strength difference and predetermined threshold value, if signal strength difference is greater than predetermined threshold value, will wait after being sent completely by end node that this locality end node is switched to transmission state and carry out data transmission; If signal strength difference is less than predetermined threshold value, local end node can be switched to transmission state immediately and carry out valid data transmission.
As shown in Figure 3, according to a third embodiment of the present invention based on wireless network node between step-out process local device, for to end node is completed valid data send after step-out treating processes, comprise: radio frequency unit 301 and Base-Band Processing unit 302, wherein, described radio frequency unit 301, comprises further:
Signal strength detection module 301-1, for receiving the control of Base-Band Processing unit 302, obtains when completing valid data and send and the strength of signal received afterwards respectively.
Radio receiving transmitting module 301-2, sends valid data for receiving the control of Base-Band Processing unit 302 and/or receives the data that end node sends; , also send valid data for the sampling point quantity that obtains according to described Base-Band Processing unit 302 to end node.
Described Base-Band Processing unit 302, comprises further:
Opposite end judges module 302-1, for calculating signal strength difference according to the described strength of signal received, and compares according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state; Also obtain the sampling point quantity sent for the frame length information according to the valid data sent, and notify described radio receiving transmitting module 301-2; When described this locality configuration mould 302-2 block makes described wireless receiving and dispatching mould 301-2 block be in data receiving state, the signal strength values receiving described signal strength detection module 301-1 acquisition is as initial signal intensity value, and the current demand signal intensity level constantly obtained with described signal strength detection module 301-1 compares respectively, obtains some described signal strength difference;
Described opposite end judges module 302-1, further also for when described signal strength difference is greater than predetermined threshold value, judges described end node is being sent data, is in data and sends state, and notify described local configuration module 302-2; When described signal strength difference is less than predetermined threshold value, judges described end node not to be sent data, it is in data receiving state, and notify described local configuration module 302-2. And for when judging to notify described local configuration module 302-2 and transmission control module 302-4 when end node is in data receiving state, notifying described local configuration module 302-2 when data send state when judging to be in by end node.
Local configuration module 302-2, judges the notice of module 302-1 for receiving opposite end, described radio receiving transmitting module 301-2 is set to data and sends state or data receiving state; When described opposite end judges that module 302-1 judges that making described radio receiving transmitting module 301-2 be placed in data when end node is in data receiving state sends state; When described opposite end judges that module 302-1 judges that end node is in radio receiving transmitting module 301-2 described in data transmission state control to be kept being placed in data receiving state. When judging that end node is in data sends state, make described radio receiving transmitting module 301-2 remain in data receiving state and notify to receive control module 302-3, also make described radio frequency unit 302 be placed in data according to the notice of described reception control module 302-3 and send state.
Receive control module 302-3, for the described frame head to the data that end node sends is resolved, so that it is determined that whether described Base-Band Processing unit 302 can carry out valid data next time send, correct when resolving the frame head to the data that end node sends, then described radio receiving transmitting module 301-2 remains in data receiving state, and obtain the described frame length information comprised by the frame head of the data that end node sends, described frame is received according to described frame length information, after finishing receiving, notifying that described local configuration module 302-2 makes described radio receiving transmitting module put 301-2 is that data send state, and notice transmission control module 302-4, when parse for frame is incorrect or does not search the described same step sequence of frame head to the data that end node sends, described radio receiving transmitting module 301-2 remains in data receiving state and notification signal intensity detection module 301-1 obtains signal strength difference, notifies that opposite end judges module 302-1 afterwards. wherein, for the same step sequence of described frame head, being that data frame head can first have the mark representing its transmission to transmit in the channel when transmitting, this mark is exactly the same step sequence of frame head.
Transmission control module 302-4, for controlling, according to the notice receiving control module 302-3, the transmission that described radio receiving transmitting module 301-2 carries out valid data next time. When described opposite end judges that module 302-1 judges that end node is in radio receiving transmitting module 301-2 described in data receiving state control sends valid data next time.
Proposing a kind of local device for above-mentioned the present invention and explain explanation further, Base-Band Processing unit informs physical layer after carrying out group frame and does transmission data processing; Wherein, the valid data that Base-Band Processing unit will send and relevant configuration information are transferred to radio frequency unit, and data are sent by radio frequency unit by antenna; Local device, according to the length information sending valid data, switches to data receiving state after being sent completely, and waits the data that end node sends; To end node by received data are converted to base band data by radio frequency unit set in end node, base band data is sent to simultaneously and the Base-Band Processing unit in end node is resolved, and send data to local device.
After local device enters into reception state, the Received signal strength intensity level of the every reporting channel at regular intervals of Base-Band Processing unit notice radio frequency unit; At this moment radio frequency unit obtains signal strength values, and reports Base-Band Processing unit; Whether Base-Band Processing unit is greater than signal strength threshold value by the signal strength difference calculated judges whether end node is sent end and process step loss condition by it, thus improves communication system working efficiency and utilization ratio of eating dishes without rice or wine.
If signal strength difference is greater than predetermined threshold value, now end node being sent data, local device is in the state receiving data, and prepares resolution data. if local device is after data processing, do not search the frame head to the data that end node sends yet, or search frame head check errors after frame head, now cannot know the length that end node is sent data, representative does not have and end node is synchronous, local device now can not be converted to data at once and send state, owing to local device is synchronous with to not having between end node, so local device still cannot obtain the length that receiving end sends data, so before being converted to transmission state again, still needing to be indicated by signal strength detection judges whether end node is sent completely. the Received signal strength intensity level of the every reporting channel at regular intervals of Base-Band Processing unit notice radio frequency unit in local device, whether Base-Band Processing unit judges signal strength difference is greater than predetermined threshold value simultaneously, if being greater than predetermined threshold value, waiting and being sent completely by end node, local device is switched to data and sends state, if being less than predetermined threshold value, local device needs to resend valid data.
If being less than predetermined threshold value, it is now that whether the strength of signal instruction numerical value again judging to obtain is greater than this predetermined threshold value owing to end node is not received data (reducing signal strength threshold value in concrete reason and method illustrates identical) by the reason of noise in channel; If being greater than predetermined threshold value, representing to end node in transmission data, if being less than predetermined threshold value, representing and end node is not sent data, local device switches to transmission state to resend data.
As shown in Figure 4, according to a fourth embodiment of the present invention based on wireless network node between the system of step-out process, be applied to local end node to end node is completed valid data send after step-out process, wherein, comprising:
In the 4th embodiment that structure and function is all identical with the local device in the 3rd embodiment, local device 401 and opposite end device 402, all comprise: Base-Band Processing unit and radio frequency unit, wherein, described Base-Band Processing unit, for making described radio frequency unit be placed in data receiving state, and control the valid data that described radio frequency unit receives described local device 401 and sends, and make described radio frequency unit be placed in data transmission state, and control the feedback data that described radio frequency unit sends described valid data.
The concrete enforcement of the application's method described by Fig. 1 to Fig. 3 and each module included by device is corresponding with the concrete enforcement of step in the application's method, owing to describing the embodiment of the method for the operating system update shown in Fig. 1 to Fig. 3 before in detail, in order to not fuzzy the application, no longer the detail of each module is described in this omission.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, any amendment of doing, equivalent replacement, improvement etc., all should be included within the right of the present invention.
Claims (11)
1. based on wireless network node between the method for step-out process, be applied to local end node to end node is completed valid data send after step-out treating processes, it is characterised in that, comprising:
Local end node has obtained when valid data send and the intensity of Received signal strength afterwards respectively, and obtains both signal strength difference;
Compare according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state;
When judging that end node is in data sends state, described local end node remains in data receiving state, and the described data sent by end node received is resolved; Wherein,
Described local end node obtains the step of signal strength difference, comprises further:
Local end node, according to the frame length information of the described valid data sent, obtains sampling point quantity;
Local end node sends valid data according to described sampling point quantity to end node, and local end node is set to data receiving state afterwards, and the current demand signal intensity level detected using scheduled duration is as initial signal intensity value;
Local end node, when data receiving state, detects current demand signal intensity level according to scheduled duration and compares with described initial signal intensity value respectively, obtain some described signal strength difference.
2. method according to claim 1, it is characterised in that, according to the step that described signal strength difference and predetermined threshold value compare, comprising:
If when described signal strength difference is greater than predetermined threshold value, judge described end node is being sent data, it is in data and sends state;
If when described signal strength difference is less than predetermined threshold value, judges described end node not to be sent data, it is in data receiving state.
3. method according to claim 1, it is characterised in that, to the step that the described data sent by end node received are resolved, comprise further:
The frame head of the described data sent by end node received is resolved by described local end node, so that it is determined that whether described local end node can carry out valid data next time sends;
If the frame head resolving the described data sent by end node is correct, then described local end node remains in data receiving state, and obtain described frame length information end node being sent the frame head of data and comprising, described frame is received according to described frame length information, after finishing receiving, described local end node is set to data and sends state, carries out valid data next time and sends;
If the frame head resolving the described data sent by end node is incorrect or does not search the same step sequence of described frame head, then described local end node remains in data receiving state, and constantly obtain signal strength difference, described signal strength difference and described predetermined threshold value are compared, when described signal strength difference is less than described predetermined threshold value, described local end node is set to data and sends state, resends described valid data.
4. method according to claim 3, it is characterised in that, the step that described signal strength difference and described predetermined threshold value compare, comprises further:
Compare according to described signal strength difference and described predetermined threshold value, so that it is determined that described to whether end node is carrying out data transmission;
If described signal strength difference is greater than described predetermined threshold value, then described to end node transmission data state, described local end node continues to remain in data receiving state;
If described signal strength difference is less than described predetermined threshold value, then described end node is no longer sent data, after this locality end node is set to data transmission state, resend described valid data.
5. method according to claim 1, it is characterised in that, according to the step that described signal strength difference and predetermined threshold value compare, comprising:
If described signal strength difference is greater than pre-set limit, judge described end node is being sent data, it is in data and sends state;
If described signal strength difference is less than predetermined threshold value, described predetermined threshold value is reduced by predetermined amplitude, predetermined threshold value after described signal strength values and reduction is compared, if described signal strength difference is still less than predetermined threshold value, judge described end node not to be sent data, it is in data receiving state.
6. based on wireless network node between step-out process a local device, for end node is completed valid data send after step-out process, comprising: radio frequency unit and Base-Band Processing unit, wherein, described radio frequency unit, comprises further:
Signal strength detection module, for receiving the control of Base-Band Processing unit, has obtained when valid data send and the strength of signal received afterwards respectively;
Radio receiving transmitting module, for receiving the control of Base-Band Processing unit, sends valid data and/or receives the data that end node sends;
Described Base-Band Processing unit, comprises further:
Opposite end judges module, for calculating signal strength difference according to the described strength of signal received, and compares according to described signal strength difference and predetermined threshold value, so that it is determined that whether end node is in data send state;
Local configuration module, for when judging that end node is in data sends state, making described radio receiving transmitting module remain in data receiving state, and notifies to receive control module;
Described reception control module, receives the described data that sent by end node for controlling described radio receiving transmitting module and resolves; Wherein,
Described opposite end judges module, and the frame length information according to the valid data sent that is further used for obtains the sampling point quantity sent, and notifies described radio receiving transmitting module; When described local configuration module makes described radio receiving transmitting module be in data receiving state, the signal strength values receiving the acquisition of described signal strength detection module is as initial signal intensity value, and the current demand signal intensity level constantly obtained with described signal strength detection module compares respectively, obtains some described signal strength difference;
Described local configuration module, judges the notice of module for receiving opposite end, described radio receiving transmitting module is set to data and sends state or data receiving state;
Described radio receiving transmitting module, sends valid data for the sampling point quantity obtained according to described Base-Band Processing unit to end node.
7. device according to claim 6, it is characterised in that,
Described opposite end judges module, is further used for when described signal strength difference is greater than predetermined threshold value, judges described end node is being sent data, is in data and sends state, and notifies described local configuration module; When described signal strength difference is less than predetermined threshold value, judges described end node not to be sent data, it is in data receiving state, and notify described local configuration module.
8. device according to claim 6, it is characterised in that, also comprise: transmission control module;
Described reception control module, it is further used for being resolved by the described frame head to the data that end node sends, so that it is determined that whether described Base-Band Processing unit can carry out valid data next time send, when the described frame head of parsing is correct, then described radio receiving transmitting module remains in data receiving state, and obtain the frame length information that described frame head comprises, described frame is received according to described frame length information, after finishing receiving, described radio receiving transmitting module is set to data and sends state, carries out valid data next time and sends;
Described local configuration module, sends state for making described radio receiving transmitting module be placed in data according to the notice of described reception control module;
Described transmission control module, for controlling, according to the notice receiving control module, the transmission that described radio receiving transmitting module carries out valid data next time.
9. device according to claim 6, it is characterised in that, also comprise: transmission control module;
Described reception control module, it is further used for being resolved by the described frame head to the data that end node sends, so that it is determined that described Base-Band Processing unit is the need of resending valid data, when the described frame head of parsing is incorrect or does not search the same step sequence of described frame head, described radio receiving transmitting module remains in data receiving state, according to the signal strength difference reported with preset duration signal strength detection module, described signal strength difference is sent to opposite end and judges module;
Described opposite end judges module, for comparing according to described signal strength difference and predetermined threshold value, so that it is determined that described radio receiving transmitting module is the need of resending described valid data; When described signal strength difference is less than described predetermined threshold value, notify described local configuration module;
Described local configuration module, for when described opposite end judges that module judges that making described radio receiving transmitting module be placed in data when end node is in data receiving state sends state;
When described opposite end, described transmission control module, for judging that module judges that end node is in radio receiving transmitting module described in data receiving state control resends described valid data.
10. device according to claim 6, it is characterised in that,
Described opposite end judges module, it is further used for being greater than predetermined threshold value when described signal strength difference, judge that described opposite end node data sends state, so that it is determined that to whether end node is in data receiving state, and when described signal strength difference is less than predetermined threshold value, described predetermined threshold value is reduced by predetermined amplitude, predetermined threshold value after described signal strength difference and reduction is compared, when described signal strength difference is still less than predetermined threshold value, judge described end node not to be sent data.
The system of step-out process between 11. 1 kinds of nodes based on wireless network, be applied to local end node to end node is completed valid data send after step-out treating processes, comprising:
Local device as according to any one of claim 6 to 10; And opposite end device, comprise: radio frequency unit and Base-Band Processing unit, wherein, described Base-Band Processing unit, it is further used for making described radio frequency unit be placed in data receiving state, and control the valid data that described radio frequency unit receives described local device and sends, and make described radio frequency unit be placed in data transmission state, and control the feedback data that described radio frequency unit sends described valid data.
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| CN1914864A (en) * | 2004-01-29 | 2007-02-14 | 皇家飞利浦电子股份有限公司 | Method of synchronizing message transmissions |
| CN102118824A (en) * | 2011-01-14 | 2011-07-06 | 利尔达科技有限公司 | Radio communication anti-collision method based on received signal strength indicator (RSSI) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1914864A (en) * | 2004-01-29 | 2007-02-14 | 皇家飞利浦电子股份有限公司 | Method of synchronizing message transmissions |
| CN102118824A (en) * | 2011-01-14 | 2011-07-06 | 利尔达科技有限公司 | Radio communication anti-collision method based on received signal strength indicator (RSSI) |
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