CN101771475A - Data transmission method and device thereof - Google Patents
Data transmission method and device thereof Download PDFInfo
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- CN101771475A CN101771475A CN200910001348A CN200910001348A CN101771475A CN 101771475 A CN101771475 A CN 101771475A CN 200910001348 A CN200910001348 A CN 200910001348A CN 200910001348 A CN200910001348 A CN 200910001348A CN 101771475 A CN101771475 A CN 101771475A
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Abstract
The invention relates to a data transmission and receiving method and a device thereof. The invention provides a method for transmitting data by a second user at a frequency band allocated to a first user, which comprises that: the second user utilizes an occupying mode or a sharing mode to transmit the data, wherein the occupying mode refers to that the second user occupies the frequency band allocated to the first user and currently not used by the first user to transmit the data, and the sharing mode refers to that the second user shares the frequency band allocated to the first user with the first user to transmit the data in a way of not influencing the normal use of the first user; a radio environment is sensed; and in response to a sensing result, the second user spontaneously performs mode switching to transmit the data, wherein the second user is spontaneously switched to the sharing mode from the occupying mode to transmit the data when the sensing result indicates that the frequency band occupied by the second user in the occupying mode is to be used by the first user, and is spontaneously switched to the occupying mode from the sharing mode when the sensing result indicates that the second user in the sharing mode finds the frequency band allocated to the first user and currently not used by the first user.
Description
Technical field
The application relates to a kind of data transmission method and device thereof.More specifically, relate to a kind of data transmission method and device thereof in use to mobile terminal (ad-hoc) mobile terminal, wherein utilized the induction wireless power technology in the mobile terminal, spontaneously to switch frequency range and used pattern.
Background technology
The present invention relates to the induction wireless power technology.Below, will simply introduce the induction wireless power technology.Inductive wireless technology is a kind of technology of radio communication, utilizes this technology, and network or radio node can change its transmission or receive parameter by the sensing radio environment.Fig. 1 exemplarily shows a basic detection process in the induction wireless power technology.Current radio environment is carried out sensing, and it relates to estimation, communication statistic information data and other the agreement/system parameterss etc. that detect frequency range cavity (that is Kong Xian frequency range), interference temperature/channel condition information.As shown in Figure 1, after the frequency range sensing, will carry out the frequency range analysis, for example, analyze according to the characteristic in the frequency range cavity of being detected, the capacity of channel etc. according to its sensing result.To carry out the frequency range access decision according to the result of frequency range sensing and frequency range analysis afterwards, in this step, for example will determine whether send, and select suitable transmission frequency band, adjust transmission parameter (for example transmitted power, data rate, modulation level etc.).
In the radio field, the limited radio resource of frequency range makes people bet great interest to time in the radio communication and space multiplexing technique.Along with the development of technology, how to utilize the limited resource of frequency range to become increasingly important more efficiently.And the induction wireless power technology can be used in above-mentioned frequency range multiplexing in, can utilize the resource of frequency range more efficiently thus and avoid authorized user and unauthorized user (will be described in more detail below) between interference.
In many countries, has similar system for the use of frequency range.For example, some frequency ranges have been authorized to the user and have obtained the right to use by the mode of paying or obtain mandate, can independently use this frequency range according to its needs.In addition, because the resource anxiety of radio frequency band, and authorized user can allow other unwarranted users to use this mandate frequency range by paid or free mode for the needs of himself and the consideration of income, can forbid that also unauthorized user uses this mandate frequency range.For example, can reach an agreement, not use at authorized user under the situation of this mandate frequency range, can allow this user to use with the certain user.Obtain the utilization rate of income and maximization frequency range thus.
For unauthorized user, under the situation of authorized user permission, mainly there is the pattern of two kinds of multiplexing frequency ranges.
At first, shown in Fig. 2 A, unauthorized user can directly take this frequency range and communicate when authorized user does not use this frequency range.In this article, this pattern is called as the pattern of taking, and in actual applications, the modal pattern that takies is that the frequency range that for example is commonly called the overlay pattern is used pattern.
Yet in the worst case, authorized user will use its frequency range always.Thus, need another kind of multiplexer mode so that still can make the utilance maximization of frequency range in this case.Such multiplex mode has been shown in Fig. 2 B.As shown in the figure, with the shared frequency range of authorized user, in other words, unauthorized user and authorized user use this section frequency range to unauthorized user jointly in the mode of the normal use that can not influence authorized user, and reduce the influence used for authorized user as far as possible.For example, unauthorized user adopts suitable power, frequency range and coded system or by other any suitable means, makes so shared normal use that can not influence authorized user.In this article, this pattern is called as sharing model.In actual applications, modal sharing model for example is commonly referred to as the frequency range use pattern of underlay pattern.For example, shown in Fig. 2 B, under described underlay pattern, unauthorized user takies very wide frequency band to be launched, and has obtained extremely low transmitting power thus.And then at authorized user, because transmitting power is very low, so the signal of communication of unauthorized user can be considered to the noise in the authorized user communication and is left in the basket.
By above-mentioned introduction as can be seen, for sharing model, owing to need reduce the normal influence of using of authorized user, therefore, the certain restriction that exists at aspects such as transmitting power, communication distances. as far as possibleTherefore, unauthorized user wishes that more employing takies pattern and utilizes frequency range.Yet when unauthorized user communicated under taking pattern, when authorized user need use this frequency range, even the unauthorized user ongoing communication, it also needed to give back as early as possible shared frequency range and uses for authorized user.At this moment, unauthorized user needs to seek other available frequency ranges in order to ensure its communication, and for example, operable frequency range that provided by another authorized user, current is to continue communication.Therefore, for the unauthorized user of wishing multiplexing frequency range, exist the needs that frequency range is switched (handoff).
At present, do not have a kind of standard normalized definition handover mechanism, the therefore method that needs a kind of frequency range to switch.
Summary of the invention
A kind of method of using the frequency range transmission data of distributing to first user by second user, described method comprises: second user use takies pattern or sharing model sends data, the pattern that wherein takies is that second CU is distributed to first user and the current frequency range of not used by first user sends data, and sharing model is that second user sends data not influence the common frequency range of distributing for this first user of using of normal mode of using of first user and described first user; The sensing radio environment; In response to sensed result, second user spontaneously carries out mode switch and sends data, wherein taking under the pattern, when sensed result is the shared frequency range of second user will be used by first user time, second user spontaneously sends data from the described mode switch that takies to sharing model; Under sharing model, when sensed result is that second user finds when distributing to first user and the current frequency range of not used by first user, second user spontaneously switches to the pattern of taking from described sharing model.
A kind ofly use the frequency range distribute to first user to send the device of data by second user, described data sending device use takies pattern or sharing model sends data, the pattern that wherein takies is that second CU is distributed to first user and the current frequency range of not used by first user sends data, and sharing model is that second user sends data not influence the common frequency range of distributing for this first user of using of normal mode of using of first user and described first user; Described data sending device comprises: the radio sensing cell is used for the sensing radio environment, and sensing result is offered switch unit; Switch unit, be used for spontaneously carrying out mode switch and send data in response to sensed result, wherein taking under the pattern, when sensed result is the shared frequency range of second user will be used by first user time, second user spontaneously sends data from the described mode switch that takies to sharing model; Under sharing model, when sensed result is that second user finds when distributing to first user and the current frequency range of not used by first user, second user spontaneously switches to the pattern of taking from described sharing model.
By method and apparatus of the present invention, reduced the possibility of interrupting the communication service of unauthorized user between transfer period in frequency range, and the permission authorized user there is not buffering, interference-free utilizes it to authorize frequency range.In addition, the application's technical scheme improved unauthorized user the frequency range successful switch probability and reduced switching delay.Thus, improved the two communication quality of authorized user and unauthorized user.Compare with previously described existing handover mechanism, do not need frequent frequency sensing, reduced power consumption thus.
Description of drawings
Fig. 1 shows sensing, the analysis and decision process of exemplary inductive radio;
Fig. 2 A and 2B show the typical example of the pattern of taking and sharing model;
Fig. 3 shows the flow chart of method according to an embodiment of the invention;
Fig. 4 shows the flow chart of the method for optional embodiment according to the present invention; And
Fig. 5 shows the block diagram of device according to an embodiment of the invention.
Embodiment
To describe preferred specific embodiment of the present invention at this, please refer to the diagram of enclosing.In the appended diagram of the present invention, identical reference number is represented same or analogous part.
At first tell about according to data transmission method for uplink of the present invention with reference to Fig. 3.As can be seen, the data sending step among Fig. 3 has two branches, shows respectively at first and taking the situation that communicates under the pattern and switch and communicate and switch at first under sharing model.At step 310 place,, authorized user is not to take the frequency range of its distribution this frequency range by unauthorized user and communicate because having to use.That is, at step 310 place, unauthorized user is under the pattern of taking.In step 320, unauthorized user is the sensing radio environment constantly.Specifically, at this moment, whether the sensing authorized user will bring into use the frequency range for its distribution.Based on sensed result, do not use under the situation of this frequency range ("No" in the step 320) at authorized user, continue to communicate to take pattern.On the other hand, when authorized user was about to use this frequency range, unauthorized user need discharge the frequency range of current use to be used (promptly for authorized user, this frequency range is about to no longer available, the "Yes" in the step 320) time, need to switch the pattern that sends data this moment, that is, method advances to step 330.At step 330 place, according to the sensing result of radio environment, promptly the frequency range that takies when unauthorized user will be authorized to the user when using, by unauthorized user spontaneously with sending mode from taking mode switch to sharing model.
Similarly, with another branch of telling about among Fig. 3, promptly from the situation of communication beginning under sharing model.In step 340, unauthorized user is by using this frequency range to send data jointly with authorized user, more specifically, for example shown in Fig. 2 B not influence the normal mode of using of authorized user and its common use frequency range.In step 350, unauthorized user carries out sensing to radio environment constantly.Specifically, under sharing model, whether sensing exists the frequency range of distributing to authorized user and current uncommitted user's use.Based on sensed result,, continue to communicate with sharing model when sensing the frequency range that does not have authorized user when available ("No" in the step 350).On the other hand, based on the result of sensing step, when unauthorized user finds when distributing to authorized user and the current frequency range of not used by this authorized user, preferably can carry out mode switch under sharing model, that is, method advances to step 360.At step 360 place,,, spontaneously sending mode is switched to the pattern of taking from sharing model by unauthorized user when unauthorized user finds when distributing to authorized user and the current frequency range of not used by this authorized user according to the sensing result of radio environment.
When carrying out mode switch, need reconfigure not shown in the above-mentioned accompanying drawing although it will be appreciated by those skilled in the art that messaging parameter (frequency range of transmitting power, use etc.).In the cognitive radio electrical domain, reconfiguring of above-mentioned parameter is known.
In addition, although in accompanying drawing 3, show the different handoff procedure of initial situation with two branches,, it will be appreciated by those skilled in the art that above-mentioned two branches can be connected to become a process that continues circulation each other from beginning to end.More specifically, shown in the dotted line in the above-mentioned accompanying drawing 3, step 340 and 350 can link together, and step 360 and step 310 can link together.Thus, unauthorized user according to the radio sensed result can with take pattern-＞sharing model-＞mode that takies pattern switches.Unauthorized user can keep communication continuity under the radio environment that changes thus.Obviously, from sharing model-＞take pattern-＞switching of sharing model also is fine.
Accompanying drawing 4 exemplarily by the communication between unauthorized user 401 and 402 show the pattern of taking-＞sharing model-＞take the switching of pattern, in addition, accompanying drawing 4 also further shows the optional embodiment that correspondingly changes the mode that transmits and receive data when mode switch.
As shown in the figure, based on sensed result, when from taking mode switch behind sharing model, unauthorized user 401 can be changed into coded system with the coded system quadrature of authorized user with coded system in response to above-mentioned mode switch, and for example such coded system can be a Walsh coding (WC1).Under the situation that changes coded system, after changing coded system, unauthorized user 401 can notify the unauthorized user 402 of communication with it.In addition, unauthorized user 402 also can oneself detect the change of this coded system.For example, when unauthorized user 402 finds that can't be with common coded system decoded signal the time, this unauthorized user 402 can switch to respective coding/decoding process according to for example predetermined agreement, so that the data that unauthorized user 401 is sent are decoded.On the other hand, as shown in Figure 4, based on the sensing result of radio environment, after unauthorized user 401 switches to the pattern of taking from sharing model, user 401 coded system changes back to original coded system, and correspondingly, user 402 also changes back to coded system original coded system.At this moment, the change of user 402 coded system can be to be triggered by user 401 message informing, also can be (for example, when find can't be with common coded system decoded signal time) that agreement that unauthorized user 402 is scheduled to according to both sides is carried out.
Those skilled in the art are to be understood that, when being in sharing model following time, owing to adopted the coded system of quadrature, the signal of communication of unauthorized user has reduced the influence of authorized user, preferably, the signal of communication of unauthorized user can be authorized to the user in thinking to communicate by letter noise and be left in the basket.Yet the orthogonal coding mode that goes out given herein only is illustrative, as long as the coded system after changing helps to reduce to the normal influence of using of authorized user and can improve the communication quality of unauthorized user, those coded systems all are available so.
Further, except according to the protocol changes coded system, can also be in response to mode switch, change to send in the employed transmitting power of data, frequency band and the coded system etc. at least a (for example, when switching to sharing model, reduce transmitting power and/or on wideer frequency band, send data and/or use orthogonal coding mode) so that for example can after mode switch, not influence the proper communication of authorized user and obtain more excellent communication quality.
Tell about according to data sending device of the present invention below with reference to Fig. 5.As shown in the figure, data sending device 500 according to the present invention can comprise radio sensing cell 510, switch unit 530 and signal changing unit 550.More specifically, 510 pairs of radio environments on every side of radio sensing cell carry out sensing, and sensing result is offered switch unit 530.Specifically, take pattern following time (use authority user 1 frequency range 1 during at time t1) when data sending device is in, whether radio sensing cell 510 sensing authorized users 1 will bring into use frequency range 1.Based on described sensing result, will be authorized to user 1 when using in current shared frequency range, switch unit 530 with the data transmission modes of this data sending device 500 from taking mode switch to sharing model.Specifically, as shown in Figure 5, the configuration of data sending device 500 is changed into sharing model configuration 525 from taking pattern configurations 515.
On the other hand, when data sending device 500 is in sharing model following time, radio sensing cell 510 sensings are distributed to the frequency range that authorized user and current uncommitted user use.Based on described sensing result, when this data sending device 500 (for example finds when distributing to the frequency range that authorized user and current uncommitted user use, at time t2 place, the frequency range 2 of authorized user 2), switch unit 530 with the data transmission modes of this data sending device 500 from taking mode switch to sharing model.Specifically, as shown in Figure 5, the configuration of data sending device changed into from sharing model configuration 525 take pattern configurations 515.As known to those skilled in the art, comprise in described change configuration and for example change transmitting power, frequency band, coded system etc.
As can be seen from the above-described embodiment, but in the frequency range of authorized user for the unauthorized user time spent, use authority user's frequency range communicates, and when the current frequency range that does not have authorized user for unauthorized user can take, thereby spontaneously switch to sharing model and use frequency range jointly, guaranteed the communication continuity of this unauthorized user thus with one of them authorized user.
In optional embodiment, data sending device can also comprise signal changing unit 550, and it is used for changing the coded system of data when data transmission modes is switched.When mode switch, signal changing unit 550 can send the coding mode of data according to predetermined protocol changes, for example, in the present embodiment, when when taking mode switch to sharing model, the coded system of this data sending device is changed into and the coded system of authorized user 2 quadratures (for example, Walsh coding); And, coded system is changed back original coded system when switching to from sharing model when taking pattern.
Further, except according to the protocol changes coded system, when switching to sharing model, can also change send in the employed transmitting power of data, frequency band and the coded system etc. at least a (for example, reduce transmitting power and/or on wideer frequency band, send data and/or use orthogonal coding mode) so that for example can after mode switch, not influence the proper communication of authorized user and obtain more excellent communication quality.
Also show another user's receiving system 600 in the accompanying drawing 5, when it is communicated by letter with data sending device 500, by with the method shown in the accompanying drawing 4 (data sending device 500 notice receiving systems 600 or receiving system 600 detect the change of transmit leg coded system voluntarily), the signal changing unit 550 that comprises in the receiving system 600 can correspondingly change the signal encoding pattern, can realize thus and the communicating by letter of data sending device 500.
It will be appreciated by those skilled in the art that at the data sending device 500 shown in the accompanying drawing 5, receiving system 600, authorized user 1,2 and comprise the parts such as (not shown) such as for example physical layer, MAC layer etc. that are used to finish communication respectively.Above-mentioned parts and other parts all are known in the art.
User's set 600 can be another unauthorized user, also can be domestic consumer, for example authorized user.
In an optional embodiment, the pattern of taking can be the overlay pattern, and sharing model can be the underlay pattern.
As mentioned above, by above-mentioned data sending device of the present invention and method, can finish and different user between seamless data communication.
Although described the present invention with transmit leg and recipient's example respectively in the present invention, yet, it will be appreciated by those skilled in the art that method of sending and receiving and the device among the present invention only is exemplary.The function that it will be appreciated by those skilled in the art that above-mentioned transmission and reception can be integrated in the communicator, for example as transceiver.For example, dispensing device in the accompanying drawing 5 500 and receiving system 600 are combined.
Should be appreciated that the respective embodiments described above, advantage, effect are illustrative and also nonrestrictive.The various embodiments described above can be combined to form various execution modes by rights mutually, although do not elaborate these possible combinations in specification, they all should be regarded as at length being disclosed in specification.
Although the present invention has been carried out setting forth particularly with reference to certain embodiments; but what those skilled in the art should understand that is; under the situation that does not deviate from of the present invention spirit illustrated and protection range, can make various changes and use equivalent that each parts is replaced by following claims.In addition, those skilled in the art can recognize, the of the present invention various assemblies of Xiang Xishuominging are not exclusiveness with operation herein, and only are to be provided for to help to understand and assess inventive concept of the present invention and advantage, and are not to be used for limiting by any way the present invention.Therefore, it is illustrative and nonrestrictive that specification and accompanying drawing all should be considered to, and above-mentioned variation and replace and all should be regarded as being comprised within protection scope of the present invention.
Claims (14)
1. a frequency range of being used to distribute to first user by second user sends the method for data, and described method comprises:
Second user use takies pattern or sharing model sends data, the pattern that wherein takies is that second CU is distributed to first user and the current frequency range of not used by first user sends data, and sharing model is that second user sends data not influence the common frequency range of distributing for this first user of using of normal mode of using of first user and described first user;
The sensing radio environment;
In response to sensed result, second user spontaneously carries out mode switch and sends data, wherein taking under the pattern, when sensed result is the shared frequency range of second user will be used by first user time, second user spontaneously sends data from the described mode switch that takies to sharing model; Under sharing model, when sensed result is that second user finds when distributing to first user and the current frequency range of not used by first user, second user spontaneously switches to the pattern of taking from described sharing model.
2. according to the process of claim 1 wherein that the sensing step is included under the pattern of taking, whether sensing first user will bring into use the frequency range for its distribution.
3. according to the process of claim 1 wherein that the sensing step is included under the sharing model, sensing is distributed to first user and the current frequency range of not used by first user.
4. according to the method for claim 2 or 3, wherein change the mode that sends data in response to described mode switch.
5. according to the method for claim 4, wherein change at least a in employed transmitting power when sending data, frequency band, the coded system in response to described mode switch.
6. according to the method for claim 5,, the coded system that sends data is changed into coded system with first user's coded system quadrature wherein when when taking mode switch to sharing model.
7. according to the method for claim 4, notify the recipient correspondingly to change the mode that receives data in response to described mode switch.
8. one kind is used the frequency range distribute to first user to send the device of data by second user, described data sending device use takies pattern or sharing model sends data, the pattern that wherein takies is that second CU is distributed to first user and the current frequency range of not used by first user sends data, and sharing model is that second user sends data not influence the common frequency range of distributing for this first user of using of normal mode of using of first user and described first user;
Described data sending device comprises:
The radio sensing cell is used for the sensing radio environment, and sensing result is offered switch unit;
Switch unit, be used for spontaneously carrying out mode switch and send data in response to sensed result, wherein taking under the pattern, when sensed result is the shared frequency range of second user will be used by first user time, second user spontaneously sends data from the described mode switch that takies to sharing model; Under sharing model, when sensed result is that second user finds when distributing to first user and the current frequency range of not used by first user, second user spontaneously switches to the pattern of taking from described sharing model.
9. whether data sending device according to Claim 8, wherein said radio sensing cell will bring into use frequency range for its distribution taking sensing first user under the pattern.
10. according to the data sending device of claim 9, wherein said radio sensing cell sensing under sharing model is distributed to first user and the current frequency range of not used by first user.
11. according to the data sending device of claim 9 or 10, wherein said data sending device further comprises signal changing unit, described signal changing unit is used for changing the mode that sends data in response to described mode switch.
12. according to the data sending device of claim 11, wherein said data sending device changes in response to described mode switch and sends at least a in the employed transmitting power of data, frequency band and the coded system.
13. according to the data sending device of claim 12, wherein when described mode switch for when taking mode switch to sharing model, the coded system that described signal changing unit will send data is changed into the coded system with first user's coded system quadrature.
14. according to the data sending device of claim 11, wherein in response to described mode switch, described data sending device notifies the recipient correspondingly to change the mode that receives data.
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|---|---|---|---|
| CN200910001348A CN101771475A (en) | 2009-01-07 | 2009-01-07 | Data transmission method and device thereof |
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| CN200910001348A CN101771475A (en) | 2009-01-07 | 2009-01-07 | Data transmission method and device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012171389A1 (en) * | 2011-06-17 | 2012-12-20 | 电信科学技术研究院 | Frequency band switching notification and frequency band switching method, system and device |
| CN110602780A (en) * | 2014-05-30 | 2019-12-20 | 高通股份有限公司 | Method and apparatus for managing transmission of uplink data over an unlicensed radio frequency spectrum band |
-
2009
- 2009-01-07 CN CN200910001348A patent/CN101771475A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012171389A1 (en) * | 2011-06-17 | 2012-12-20 | 电信科学技术研究院 | Frequency band switching notification and frequency band switching method, system and device |
| CN110602780A (en) * | 2014-05-30 | 2019-12-20 | 高通股份有限公司 | Method and apparatus for managing transmission of uplink data over an unlicensed radio frequency spectrum band |
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Application publication date: 20100707 |