CN102348236B - Communication means, communication terminal and communication system - Google Patents
Communication means, communication terminal and communication system Download PDFInfo
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- CN102348236B CN102348236B CN201010251308.5A CN201010251308A CN102348236B CN 102348236 B CN102348236 B CN 102348236B CN 201010251308 A CN201010251308 A CN 201010251308A CN 102348236 B CN102348236 B CN 102348236B
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Abstract
A kind of communication means, communication terminal and communication system are provided.The method comprises: when needing there being data to send, not carrying out back-off operation, sending data immediately to destination node; Judge whether described destination node successfully receives sent data; If it is determined that described destination node is unsuccessful receive sent data, then after one section of back off time, again send described data to described destination node, wherein, back off time is fixing or change.Thus effectively can reduce the energy consumption of transfer of data in a network, packet loss and time delay and improve the peak rate of transfer of data.
Description
Technical field
Present invention relates in general to the communications field, particularly relate to the communication means of the less network of a kind of more applicable nodes, communication terminal and communication system.
Background technology
Along with the development of the communication technology, the communication network for various different scales is needed to adopt suitable Channel Access Mechanism.
In existing IEEE802.15.4 standard, the network (such as, BodyAreaNetwork, body area network) less for interstitial content have employed following Channel Access Mechanism.Wherein, node, when there being data to need to send, first random back a period of time, then checks channel whether available free (such as, being checked by CCA mode).If available free channel, then log-on data sends immediately, otherwise, then continue to keep out of the way until available free channel occurs.
Summary of the invention
Give hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
The object of the present invention is to provide a kind of for communication means, communication terminal and communication system, it can improve network, especially there is the performance of the transfer of data in the network of fewer destination node, specifically, effectively can reduce the energy consumption of transfer of data in the network, packet loss and time delay and improve the peak rate of transfer of data.
To achieve these goals, according to an aspect of the present invention, first, when needing there being data to send, not carrying out back-off operation, sending data to destination node immediately.Then judge whether described destination node successfully receives sent data.If it is determined that described destination node is unsuccessful receive sent data, then after one section of back off time, again send described data to described destination node, wherein, back off time is fixing or change.Wherein, judge whether described destination node successfully receives sent data and comprise: if one section of stand-by period adduction to the confirmation from described destination node, then judges that described destination node successfully receives sent data after transmission data; If do not receive confirmation in one period of stand-by period after transmission data, then judge that described destination node is unsuccessful and receive sent data.
By below in conjunction with the detailed description of accompanying drawing to most preferred embodiment of the present invention, these and other advantage of the present invention will be more obvious.
Accompanying drawing explanation
The present invention can be better understood by reference to hereinafter given by reference to the accompanying drawings description, wherein employs same or analogous Reference numeral in all of the figs to represent identical or similar parts.Described accompanying drawing comprises in this manual together with detailed description below and forms the part of this specification, and is used for illustrating the preferred embodiments of the present invention further and explaining principle and advantage of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart of communication means according to an embodiment of the invention.
Fig. 2 shows the schematic diagram of communication terminal according to an embodiment of the invention.
Fig. 3 shows the comparison diagram according to the communication system of the embodiment of the present invention and the energy consumption according to the communication system of IEEE802.15.4 standard.
Fig. 4 shows the comparison diagram according to the communication system of the embodiment of the present invention and the peak rate according to the communication system of IEEE802.15.4 standard.
Fig. 5 shows the comparison diagram according to the communication system of the embodiment of the present invention and the packet loss according to the communication system of IEEE802.15.4 standard.
Fig. 6 shows the comparison diagram according to the communication system of the embodiment of the present invention and the time delay according to the communication system of IEEE802.15.4 standard.
Fig. 7 is the block diagram of the example arrangement that wherein can realize according to the method for the embodiment of the present invention and/or the general purpose personal computer of device.
Embodiment
To be described one exemplary embodiment of the present invention by reference to the accompanying drawings hereinafter.For clarity and conciseness, all features of actual execution mode are not described in the description.But, should understand, must make a lot specific to the decision of execution mode in the process of any this practical embodiments of exploitation, to realize the objectives of developer, such as, meet those restrictive conditions relevant to system and business, and these restrictive conditions may change to some extent along with the difference of execution mode.In addition, although will also be appreciated that development is likely very complicated and time-consuming, concerning the those skilled in the art having benefited from present disclosure, this development is only routine task.
At this, also it should be noted is that, in order to avoid the present invention fuzzy because of unnecessary details, illustrate only in the accompanying drawings with according to the closely-related apparatus structure of the solution of the present invention and/or treatment step, and eliminate other details little with relation of the present invention.
Fig. 1 shows the flow chart of communication means according to an embodiment of the invention.As described in Figure 1, this communication means comprises step S102-S106.
In step S102 place, the communication terminal in network sends data to destination node.
Then, in step S104 place, this communication terminal judges whether destination node successfully receives sent data.
If it is determined that destination node successfully receives sent data, then process terminates.
If it is determined that destination node does not successfully receive sent data, then in step S106, communication terminal first keeps out of the way a period of time, again sends data to destination node more afterwards.
Like this, a kind of novel communication means of network for having fewer destination node is achieved.
In the methods described above, different from prior art (such as IEEE802.15.4 standard), the terminal in network needs to send to destination node immediately when sending there being data, instead of first keeps out of the way a period of time.Owing to not being first keep out of the way, for the network that interstitial content is few, the time delay of transfer of data in the network can be reduced like this and improve the peak rate of transfer of data.
In addition, in method according to the above embodiment of the present invention, described network can be wirelessly, the communication network of any appropriate set up of the combination of wired mode or wired mode and wireless mode.Thus, the communication terminal in this network can wirelessly or wired mode send data to destination node.
In a preferred embodiment of the invention, described network can be the less network of interstitial content.In one more preferred embodiment, described network is body area network.But the present invention is not limited thereto, but be applicable to any network, the network that especially nodes is less, such as industrial robot sensor network, small-sized monitor network etc.
According in the method for the arbitrary above-described embodiment of the present invention, communication terminal can adopt various suitable technological means to judge whether destination node successfully receives sent data.Such as, communication terminal can based on whether within the wait period of scheduled duration the confirmation received from destination node judge.
Specifically, when communication terminal receives the confirmation from destination node within the wait period of scheduled duration, communication terminal can judge that destination node successfully have received sent data.On the contrary, if communication terminal is not receiving the confirmation from destination node yet after the wait period of scheduled duration, then communication terminal can judge that destination node does not receive data, and namely this secondary data sends unsuccessfully.
Wherein, the duration of various suitable wait period can be set for different network conditions.As a preferred embodiment, such as, interstitial content is in a network about in the body area network of 20, and the duration of above-mentioned wait period preferably can be set to 5ms.
In addition, in the said method of any embodiment according to the present invention, communication terminal can arrange back off time in every way based on various factors.Such as, communication terminal can adopt fixing back off time, as adopted empirical value or arrange a fixing duration at random as back off time.In addition, communication terminal also can adopt the back off time of change, and such as, communication terminal can arrange back off time according to network state at every turn; Or back off time can be set to successively increase by communication terminal until the upper limit or successively reduction are until its lower limit (wherein can arrange this upper limit or lower limit based on experience value).In addition, communication terminal also such as can arrange back off time according to the priority of node according to other factors.
In one embodiment of the invention, communication terminal can be kept out of the way according to the priority of nodes.Such as, communication terminal can keep out of the way corresponding back off time according to the priority of the node sending data, also corresponding back off time can be kept out of the way according to the priority of the destination node of data, or also corresponding back off time can be kept out of the way in conjunction with the priority of the priority of sending node and destination node.
In a preferred embodiment of the invention, the communication terminal sending data can keep out of the way the back off time corresponding to the priority of himself.Specifically, if the priority sending the communication terminal of data is higher, then it is when needs are kept out of the way, and the back off time kept out of the way is shorter; If the priority sending the communication terminal of data is lower, then its back off time kept out of the way is longer.
As a specific embodiment of the present invention, such as, in the body area network of medical field, the communication terminal sending data such as can comprise the transducer of take temperature, the transducer of Measure blood pressure, the sensor of measurement heart rate.
Because the importance of the medical parameter of each sensor measurement is different, therefore each transducer i.e. each communication terminal can be configured to have different priority.Such as, the priority measuring the transducer of heart rate is configured to the priority of the transducer higher than Measure blood pressure, and the priority of the transducer of Measure blood pressure is configured to the priority of the transducer higher than take temperature.
Like this, when needs execution is kept out of the way, the back off time measuring the transducer of heart rate is the shortest, and the back off time of the transducer of Measure blood pressure is slightly long, and the back off time of the transducer of take temperature is the longest.
In another preferred embodiment of the invention, the communication terminal sending data can keep out of the way the back off time corresponding to the priority of destination node.Specifically, if the priority of the destination node of data is higher, then the back off time that the communication terminal sending these data is kept out of the way is shorter, if the priority of the destination node of data is lower, then the back off time that the communication terminal sending these data is kept out of the way is then longer.
Such as, as a specific embodiment, in the body area network of medical field, communication terminal and the destination node that can receive data such as can comprise the processor, the processor of reception prompting, the processor etc. of reception urgent call that receive physiological parameter.
Because the effect of each processor is different, therefore each processor i.e. each destination node is configured to have different priority.Such as, the priority receiving the processor of physiological parameter is configured to the priority of the processor reminded lower than reception, and the priority receiving the processor reminded is configured to the priority lower than the processor receiving urgent call.
Like this, when needs execution is kept out of the way, the communication terminal sending data can keep out of the way the back off time corresponding to the priority of this destination node according to the priority of the destination node of data.
Such as, when the destination node of data is the processors receiving urgent call, the back off time that the communication terminal sending these data is kept out of the way is shorter; When the destination node of data is the processors receiving prompting, the back off time that the communication terminal sending these data is kept out of the way is slightly long; And when the destination node of data is the processors receiving physiological parameter, the back off time that the communication terminal sending these data is kept out of the way is the longest.
In addition, although respectively describe the embodiment according to sending the priority of communication terminal self of data and the priority of the destination node of data and carrying out keeping out of the way above, the present invention is not limited thereto.In another preferred embodiment of the invention, the communication terminal sending data also can be kept out of the way according to the combination of the priority of himself with both the priority of the destination node of these data.
As a specific embodiment, respectively the first weighted value can be set based on the priority of communication terminal sending data and priority based on the destination node of data arranges the second weighted value.Such as, the relation of weighted value and priority can be arranged to: priority is higher, and weighted value is higher; Priority is lower, and weighted value is lower.Certainly, the relation of weighted value and priority also can carry out other different setting.
When needs execution is kept out of the way, the communication terminal sending data can keep out of the way the back off time corresponding with the second weighted value sum with the first weighted value.
Can be found out by above-described embodiment, by keeping out of the way different back off times according to the priority of nodes, effectively can reduce the energy consumption of transfer of data in the network, packet loss and time delay and improving the peak rate of transfer of data.
According to the abovementioned embodiments of the present invention, back off time is relevant with the priority of node.Therefore, in order to better reflect the relation of back off time and priority, in one embodiment of the invention, back off time can be quantified as the integral multiple of base unit; Wherein said base unit can be the duration of any appropriate.
In a preferred embodiment, described base unit can comprise the communication terminal transmission time of data and the waiting time of communication terminal wait-receiving mode destination node feedback information.
By reasonably arranging back off time, the performance of the transfer of data in network more effectively can be improved.
In addition, according in the said method of the embodiment of the present invention, the priority of node can be set based on various factors.Such as, can arrange based on any one or more in the effect of node, type, hierarchical position in a network etc.
In one embodiment of the invention, the priority of node can be set according to the node type in network.Such as, in the body area network of medical field, node such as can comprise body temperature trans, the pre ure tra ducer of Measure blood pressure, the heart rate sensor etc. of measurement heart rate of take temperature.Therefore, can come to the different priority of Node configuration according to the type of node, such as the priority of the heart rate sensor measuring heart rate is set to the highest, the priority of the pre ure tra ducer of Measure blood pressure is set to lower slightly, and the priority of the body temperature trans of take temperature is set to minimum.
In another embodiment of the invention, can be used for arranging the priority of node according to the node in network.Such as, in the body area network of medical field, node such as can comprising node for measuring human body physiological parameter, occurring the node of ill sign and the node etc. for the treatment of emergency for reminding.According to the effect of these nodes, such as can the priority of the node measuring human body physiological parameter be set to minimum, slightly high by being used for reminding the priority of the node occurring ill sign to be set to, and the priority of the node for the treatment of emergency is set to the highest.
In another embodiment of the invention, then the priority of node can be set according to node hierarchical position in a network.Such as, in star topology network, what the priority of aggregation node can be arranged is higher, and the priority of branch node is arranged lower.Again such as, in ring topology network, what the priority of Centroid can be arranged is higher, and by the priority of periphery node arrange lower.
In addition, about the setting of node priority, although the present invention is described for the hierarchical position of node type, node effect and node respectively, but the present invention is not limited thereto, those skilled in the art obviously can recognize, also one or more in these above-mentioned factors can be combined the setting carrying out node priority.
By keeping out of the way based on priority for different Node configuration different priorities, effectively can reduce the energy consumption of the transfer of data in network, packet loss and time delay and improving the peak rate of transfer of data.
Embodiments of the invention additionally provide a kind of communication terminal, and it is particularly suited for using in the network that interstitial content is less.The performance of the transfer of data in network can be improved by this communication terminal, specifically, effectively can reduce the energy consumption of transfer of data in the network, packet loss and time delay and improve the peak rate of transfer of data.
Fig. 2 is the schematic diagram that communication terminal is according to an embodiment of the invention shown.
As shown in Figure 2, can comprise according to the communication terminal 200 of the embodiment of the present invention: data sending part 202, judging part 204 and backoff portion 206.
Data sending part 202 can be configured to send data to the destination node in network.
Judging part 204 can be configured to judge whether destination node successfully receives sent data.
If judging part 204 judges that destination node successfully receives sent data, then show that this secondary data of data sending part 202 sends successfully.
If judging part 204 judges that destination node does not successfully receive sent data, then notify backoff portion 206.
Backoff portion 206 can be configured to make communication terminal 200 keep out of the way a period of time, again sends data to destination node more afterwards.
Like this, a kind of novel communication terminal being applicable to the network with fewer destination node is achieved.
The network at above-mentioned communication terminal place can be wirelessly, the communication network of any appropriate set up of the combination of wired mode or wired mode and wireless mode, and described data sending part 202 can wirelessly or wired mode send data to destination node.
In a preferred embodiment of the invention, described network can be the less network of interstitial content.In one more preferred embodiment, described network is body area network.But the present invention is not limited thereto, but be applicable to any network, the network that especially nodes is less, such as industrial robot sensor network, small-sized monitor network etc.
According to the abovementioned embodiments of the present invention, communication terminal can adopt various suitable technological means to judge whether destination node successfully receives sent data.
In another embodiment of the present invention, the judging part in communication terminal can based on whether within the wait period of scheduled duration the confirmation received from destination node judge.
Specifically, when communication terminal receives the confirmation from destination node within the wait period of scheduled duration, judging part can judge that destination node successfully have received sent data.On the other hand, if communication terminal is not receiving the confirmation from destination node yet after the wait period of scheduled duration, then judging part can judge that destination node does not receive data, namely this time sends failure.
In addition, in arbitrary above-described embodiment according to the present invention, communication terminal can arrange back off time in every way based on various factors.Such as, communication terminal can adopt fixing back off time, as adopted empirical value or arrange a fixing duration at random as back off time.In addition, communication terminal also can adopt the back off time of change, and such as, communication terminal can arrange back off time according to network state at every turn; Or back off time can be set to successively increase by communication terminal until the upper limit or successively reduction are until its lower limit (wherein can arrange this upper limit or lower limit based on experience value).In addition, communication terminal also such as can arrange back off time according to the priority of node according to other factors.
In one embodiment of the invention, communication terminal can be kept out of the way according to the priority of nodes.Such as, backoff portion in communication terminal can be configured to make communication terminal keep out of the way the back off time corresponding to priority according to the priority of the node sending data, or make communication terminal keep out of the way the back off time corresponding to priority according to the priority of the destination node of data, or also communication terminal can be made to keep out of the way corresponding back off time according to the combination of the priority of the priority of sending node and destination node.
Can find out, being configured to the backoff portion of keeping out of the way different back off times according to the priority of nodes by utilizing, effectively can reducing the energy consumption of transfer of data in the network, packet loss and time delay according to communication terminal of the present invention and improving the peak rate of transfer of data.
According to the abovementioned embodiments of the present invention, back off time is relevant with the priority of node.Therefore, in order to better reflect the relation of back off time and priority, in one embodiment of the invention, back off time can be quantified as the integral multiple of base unit.Wherein, described base unit can be the duration of any appropriate or can comprise data sending part in communication terminal and send the time of data and the waiting time of communication terminal wait-receiving mode destination node feedback information.
By reasonably arranging back off time, the performance of the transfer of data in network more effectively can be improved according to the communicator of the embodiment of the present invention.
In addition, according in the above-mentioned communicator of any embodiment of the present invention, the priority of the node in network can be set based on various factors.In an embodiment of the present invention, can arrange based on any one or more in the effect of node, type, hierarchical position in a network etc.
According to the communication terminal of the embodiment of the present invention, by keeping out of the way based on priority for different Node configuration different priorities, effectively can reduce the energy consumption of the transfer of data in network, packet loss and time delay and improving the peak rate of transfer of data.
Preferably, the communication means according to the embodiment of the present invention can correspondingly be implemented according to the communication terminal of the embodiment of the present invention.Therefore, the ins and outs in concrete enforcement can, see the correlative detail in embodiment of the method, repeat no more to make specification succinct herein.
Embodiments of the invention additionally provide and a kind ofly comprise at least one communication system according to the communication terminal of any above-described embodiment.
In this communication system, by make use of communication terminal according to the embodiment of the present invention and communication means, effectively can reduce the energy consumption of transfer of data, packet loss and time delay and improving the peak rate of transfer of data.
For the communication system (to arrange the situation of back off time according to the priority of the source node sending data) according to the embodiment of the present invention and the communication system according to IEEE802.15.4 standard, further their communication performance is emulated.
Wherein, in simulation process, network node number be set to 20 (wherein 20 nodes are configured to have 20 different priority), transmitting power is set to 31.32mW, received power is set to 35.46mW, the power consumption of system wait is set to 0.7668mW, the power consumption of system hibernates is set to 0.036mW, data package size is set to 100 bytes, timing statistics is 23000 seconds.
Fig. 3 shows the comparison diagram of the communication system according to the embodiment of the present invention that obtained by above-mentioned simulation process and the energy consumption according to the communication system of IEEE802.15.4 standard.
The transverse axis of Fig. 3 represents Packet Generation interval, and the longitudinal axis represents system energy consumption.As can be seen from Figure 3, when different packet interval, according to the energy consumption of communication system of the present invention all lower than the energy consumption of the communication system according to IEEE802.15.4 standard.Wherein, maximum energy consumption is saved and is reached about 25%.
Fig. 4 shows the comparison diagram of the communication system according to the embodiment of the present invention that obtained by above-mentioned simulation process and the peak rate according to the communication system of IEEE802.15.4 standard.
The transverse axis of Fig. 4 represents Packet Generation interval, and the longitudinal axis represents peak rate.As can be seen from Figure 4, when different packet interval, according to the peak rate of communication system of the present invention all higher than the peak rate of the communication system according to IEEE802.15.4 standard.Can find out, maximum peak rate promotes and reaches about 25%.
Fig. 5 shows the comparison diagram of the communication system according to the embodiment of the present invention that obtained by above-mentioned simulation process and the packet loss according to the communication system of IEEE802.15.4 standard.
The transverse axis of Fig. 5 represents packet loss, and the longitudinal axis represents the probability of actual packet loss higher than the packet loss described in transverse axis.Can find out in composition graphs 5, according in the communication system of the embodiment of the present invention, the probability that packet loss occurs obtains significant reduction.
Fig. 6 shows the comparison diagram of the communication system according to the embodiment of the present invention that obtained by above-mentioned simulation process and the time delay according to the communication system of IEEE802.15.4 standard.
The transverse axis of Fig. 6 represents Packet Generation interval, and the longitudinal axis represents time delay.As can be seen from Figure 6, when different packet interval, according to the time delay of communication system of the present invention all lower than the time delay of the communication system according to IEEE802.15.4 standard.Can find out, maximum time delay decreases about 33%.
In addition, it should be understood that various example as herein described and embodiment are all exemplary, the present invention is not limited thereto.In this manual, the statement such as " first ", " second " is only used to described feature to distinguish on word, clearly to describe the present invention.Therefore, should not be regarded as there is any determinate implication.
In said apparatus, all modules, unit are configured by software, firmware, hardware or its mode combined.Configure spendable concrete means or mode is well known to those skilled in the art, do not repeat them here.When being realized by software or firmware, to the computer (all-purpose computer 700 such as shown in Fig. 7) with specialized hardware structure, the program forming this software is installed from storage medium or network, this computer, when being provided with various program, can perform various functions etc.
In the figure 7, CPU (CPU) 701 performs various process according to the program stored in read-only memory (ROM) 702 or from the program that storage area 708 is loaded into random access memory (RAM) 703.In RAM703, also store the data required when CPU701 performs various process etc. as required.CPU701, ROM702 and RAM703 are connected to each other via bus 704.Input/output interface 705 is also connected to bus 704.
Following parts are connected to input/output interface 705: importation 706 (comprising keyboard, mouse etc.), output 707 (comprise display, such as cathode ray tube (CRT), liquid crystal display (LCD) etc., and loud speaker etc.), storage area 708 (comprising hard disk etc.), communications portion 709 (comprising network interface unit such as LAN card, modulator-demodulator etc.).Communications portion 709 is via network such as internet executive communication process.As required, driver 710 also can be connected to input/output interface 705.Detachable media 711 such as disk, CD, magneto optical disk, semiconductor memory etc. are installed on driver 710 as required, and the computer program therefrom read is installed in storage area 708 as required.
When series of processes above-mentioned by software simulating, from network such as internet or storage medium, such as detachable media 711 installs the program forming software.
It will be understood by those of skill in the art that this storage medium is not limited to wherein having program stored therein shown in Fig. 7, distributes the detachable media 711 to provide program to user separately with equipment.The example of detachable media 711 comprises disk (comprising floppy disk (registered trade mark)), CD (comprising compact disc read-only memory (CD-ROM) and digital universal disc (DVD)), magneto optical disk (comprising mini-disk (MD) (registered trade mark)) and semiconductor memory.Or hard disk that storage medium can be ROM702, comprise in storage area 708 etc., wherein computer program stored, and user is distributed to together with comprising their equipment.
The present invention also proposes a kind of program product storing the instruction code of machine-readable.When described instruction code is read by machine and performs, the above-mentioned method according to the embodiment of the present invention can be performed.
Correspondingly, be also included within of the present invention disclosing for carrying the above-mentioned storage medium storing the program product of the instruction code of machine-readable.Described storage medium includes but not limited to floppy disk, CD, magneto optical disk, storage card, memory stick etc.
Finally, also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.In addition, when not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Although describe embodiments of the invention in detail by reference to the accompanying drawings above, it should be understood that execution mode described above is just for illustration of the present invention, and be not construed as limiting the invention.For a person skilled in the art, can make various changes and modifications above-mentioned execution mode and not deviate from the spirit and scope of the invention.Therefore, scope of the present invention is only limited by appended claim and equivalents thereof.
In addition, by describing above and can finding out, The embodiment provides following technical scheme:
Technical scheme 1. 1 kinds of communication meanss, comprising:
Data are sent to destination node;
Judge whether described destination node successfully receives sent data;
If it is determined that described destination node is unsuccessful receive sent data, then after one section of back off time, again send described data to described destination node.
The method of technical scheme 2. according to technical scheme 1, wherein judge whether described destination node successfully receives sent data and comprise: if one section of stand-by period adduction to the confirmation from described destination node, then judges that described destination node successfully receives sent data after transmission data; If do not receive confirmation in one period of stand-by period after transmission data, then judge that described destination node is unsuccessful and receive sent data.
The method of technical scheme 3. according to technical scheme 1 or 2, wherein, the priority sending the source node of data is higher, and described back off time is shorter.
The method of technical scheme 4. according to technical scheme 2, wherein, the base unit of described back off time adds the described stand-by period at the time that transmission data spend.
The method of technical scheme 5. according to technical scheme 3, wherein, the priority of source node arranges based at least one in the type of source node, effect and source node hierarchical position in a network.
Technical scheme 6. 1 kinds of communication terminals, comprising:
Data sending part, is configured to send data to destination node;
Judging part, is configured to judge whether described destination node successfully receives sent data; And
Backoff portion, is configured to, when described judging part judges that described destination node is unsuccessful and receives sent data, again send described data to described destination node after making described data sending part keep out of the way one section of back off time.
The communication terminal of technical scheme 7. according to technical scheme 6, wherein said judging part is configured to further: if one section of stand-by period adduction to the confirmation from described destination node, then judges that described destination node successfully receives sent data after transmission data; If do not receive described confirmation in one period of stand-by period after transmission data, then judge that described destination node is unsuccessful and receive sent data.
The communication terminal of technical scheme 8. according to technical scheme 6 or 7, wherein, described backoff portion is configured to: the priority sending the source node of data is higher, and the back off time that described data sending part is kept out of the way is shorter.
The communication terminal of technical scheme 9. according to technical scheme 7, wherein, the base unit of described back off time adds the described stand-by period at the time that transmission data spend.
The communication terminal of technical scheme 10. according to technical scheme 8, wherein the priority of source node arranges based at least one in the type of source node, effect and source node hierarchical position in a network.
Technical scheme 11. 1 kinds of communication systems, comprise at least one communication terminal any one of technical scheme 6-10.
Technical scheme 12. 1 kinds of program products, this program product comprises the executable instruction of machine, and when performing described instruction on messaging device, described instruction makes the method for described messaging device execution as described in one of technical scheme 1 to 5.
Technical scheme 13. 1 kinds of storage mediums, this storage medium comprises machine-readable program code, when performing described program code on messaging device, described program code makes the method for described messaging device execution as described in one of technical scheme 1 to 5.
Claims (9)
1. a communication means, comprising:
When needing there being data to send, not carrying out back-off operation, sending data to destination node immediately;
Judge whether described destination node successfully receives sent data;
If it is determined that described destination node is unsuccessful receive sent data, then after one section of back off time, again send described data to described destination node, wherein, described back off time is fixing or change;
Wherein judge whether described destination node successfully receives sent data and comprise: if one section of stand-by period adduction to the confirmation from described destination node, then judges that described destination node successfully receives sent data after transmission data; If do not receive confirmation in one period of stand-by period after transmission data, then judge that described destination node is unsuccessful and receive sent data.
2. method according to claim 1, wherein, the priority sending the source node of data is higher, and described back off time is shorter.
3. method according to claim 1, wherein, the base unit of described back off time adds the described stand-by period at the time that transmission data spend.
4. method according to claim 2, wherein, the priority of source node arranges based at least one in the type of source node, effect and source node hierarchical position in a network.
5. a communication terminal, comprising:
Data sending part, is configured to, when there being data to need to send, not carrying out back-off operation, send data immediately to destination node;
Judging part, is configured to judge whether described destination node successfully receives sent data; And
Backoff portion, be configured to, when described judging part judges that described destination node is unsuccessful and receives sent data, again send described data to described destination node after making described data sending part keep out of the way one section of back off time, wherein, described back off time is fixing or change
Wherein said judging part is configured to further: if one section of stand-by period adduction to the confirmation from described destination node, then judges that described destination node successfully receives sent data after transmission data; If do not receive described confirmation in one period of stand-by period after transmission data, then judge that described destination node is unsuccessful and receive sent data.
6. communication terminal according to claim 5, wherein, described backoff portion is configured to: the priority sending the source node of data is higher, and the back off time that described data sending part is kept out of the way is shorter.
7. communication terminal according to claim 5, wherein, the base unit of described back off time adds the described stand-by period at the time that transmission data spend.
8. communication terminal according to claim 6, wherein the priority of source node arranges based at least one in the type of source node, effect and source node hierarchical position in a network.
9. a communication system, comprises at least one communication terminal any one of claim 5-8.
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| CN106658362B (en) * | 2016-10-20 | 2020-09-11 | 深圳市元征科技股份有限公司 | Information exchange method and device for body area network |
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| US6961344B1 (en) * | 2001-06-19 | 2005-11-01 | Advanced Micro Devices, Inc. | Verification of collision detection and resolution in a home network |
| CN101072146A (en) * | 2007-04-13 | 2007-11-14 | 东华大学 | Body area medical wireless sensor network and its information collection and transmission method |
| CN101527928A (en) * | 2009-03-19 | 2009-09-09 | 中兴通讯股份有限公司 | System and method for transmitting circuit data service |
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| US6961344B1 (en) * | 2001-06-19 | 2005-11-01 | Advanced Micro Devices, Inc. | Verification of collision detection and resolution in a home network |
| CN101072146A (en) * | 2007-04-13 | 2007-11-14 | 东华大学 | Body area medical wireless sensor network and its information collection and transmission method |
| CN101527928A (en) * | 2009-03-19 | 2009-09-09 | 中兴通讯股份有限公司 | System and method for transmitting circuit data service |
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