CN104243006A - Wireless transmission method and device - Google Patents
Wireless transmission method and device Download PDFInfo
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- CN104243006A CN104243006A CN201410446125.7A CN201410446125A CN104243006A CN 104243006 A CN104243006 A CN 104243006A CN 201410446125 A CN201410446125 A CN 201410446125A CN 104243006 A CN104243006 A CN 104243006A
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Abstract
The embodiment of the invention provides a wireless transmission control method and device. The wireless transmission control method comprises the steps that a transmitting strategy of transmitting equipment is determined, wherein the transmitting strategy comprises a time interval of the transmitting equipment carrying out omni-directional transmitting; the transmitting mode of the transmitting equipment is controlled to be adjusted into an omni-directional transmitting mode as a response when the interval between the current time and the previous omni-directional transmitting time reaches the time interval. According to the wireless transmission method and device, the transmitting equipment is controlled to be in the omni-directional transmitting mode at a certain time interval, so that it is ensured that the transmitting equipment can receive signals used for determining the correct transmitting direction, and it is ensured that communication is normally carried out particularly on the condition that the two parties of communication move and/or the transmission environment is changed.
Description
Technical field
The embodiment of the present invention relates to communication technical field, particularly relates to a kind of radio transmitting method and radio transmitting device.
Background technology
Smart antenna can adjust inherent parameters in real time according to actual channel conditions, effectively follows the trail of multiple user, realizes space division multiple access (SDMA) in systems in which.At present in moving communicating field, smart antenna is deployed in communication one side mostly, and mostly is base station side.Traditional base station is comparatively fixing, the mode of the wireless signal many employings directional transmissions between base station and terminal equipment, and the reciprocity principle utilizing wireless channel to transmit, by arrival direction (the Direction of Arrival of estimating received signal, DOA), and using this DOA as expection launch party always realize directional transmissions.
Smart antenna can realize on the mobile apparatus equally, and benefit at least comprises: lower electromagnetic wave to the radiation of human body, reduce equipment power dissipation, improve communications privacy, improve power system capacity.Although it is feasible for realizing smart antenna on the mobile apparatus, various new technological challenge can be faced.
Summary of the invention
In view of this, an object of the embodiment of the present application is the antenna scheme providing a kind of mobile device.
For achieving the above object, according to the first aspect of the embodiment of the present invention, provide a kind of wireless transmission control method, described method comprises:
Determine that one of transmitter launches strategy, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission;
Reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
According to the second aspect of the embodiment of the present invention, provide a kind of wireless transmission control device, described device comprises:
One first determination module, for determining that one of transmitter launches strategy, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission;
One first control module, for reaching the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, controls the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
The method of the embodiment of the present application and device enter theaomni-directional transmission pattern at a certain time interval by controlling transmitter, ensure that receiving equipment can receive the signal that can be used for determining correct transmit direction, thus ensure that normally carrying out of especially communicating when communicating pair is moved and/or transmission environment changes.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the wireless transmission control method of the embodiment of the present application;
Fig. 2 (a)-Fig. 2 (b) is the theaomni-directional transmission time interval schematic diagram in each embodiment of the application;
Fig. 3 is the structural representation of the first implementation of the wireless transmission control device of a kind of embodiment of the application;
Fig. 4 is the structural representation of the second implementation of the wireless transmission control device of a kind of embodiment of the application;
Fig. 5 is the structural representation of the third implementation of the wireless transmission control device of a kind of embodiment of the application;
Fig. 6 is the structural representation of the 4th kind of implementation of the wireless transmission control device of a kind of embodiment of the application;
Fig. 7 is the structural representation of the 5th kind of implementation of the wireless transmission control device of a kind of embodiment of the application;
Fig. 8 is the structural representation of the 6th kind of implementation of the wireless transmission control device of a kind of embodiment of the application;
Fig. 9 is the structural representation of the wireless transmission control device of the another kind of embodiment of the application.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
It will be understood by those skilled in the art that the terms such as " first ", " second " in the application are only for distinguishing distinct device, module or parameter etc., neither represent any particular technology implication, also do not represent the inevitable logical order between them.
In addition, in each embodiment of the application, described " transmitter " and " receiving equipment " can be the equipment arbitrarily with transmission of wireless signals function, the equipment of the transmitting and receiving of wireless signal is especially carried out by smart antenna, such equipment can comprise traditional base station, radio reception device (AP) and any terminal equipment (such as, mobile phone, mobile unit, portable set etc.), and " transmitter " or " receiving equipment " or the two all can have locomotivity." transmitter " and " receiving equipment " can be same equipment, distinguishes the two possibility role in communication process, not as any restriction to the two function in each embodiment of the application by " transmitting " and " reception ".Particularly, the communication technology that described communication adopts or standard can have multiple, such as, global system for mobile communications (Global System of Mobile Communication, GSM), Long Term Evolution (Long Term Evolution, LTE), WiFi, bluetooth etc.When " transmitter " and " receiving equipment " like this carries out directed wireless transmission and receives, if the DOA still depending on the signal that the other side sends separately estimates, once a method, apparatus is moved or transmission environment changes, with according to the DOA of the signal received before, so desirable transmit direction will estimate that the transmit direction difference set is very large, the signal that the transmit direction of setting is launched possibly cannot arrive opposite end communication equipment, or even before cannot receive at all can be for reference Received signal strength also just cannot carry out DOA estimation, thus cause communication disruption.
In realization, the smart antenna described in each embodiment of the application can be have the identical bay of equipolarization characteristic, isotropism and gain, arranges in a certain way, the aerial array of formation, this aerial array at least two bays.Also can be reconfigurable antenna battle array, each bay in array can pass through MEMS (micro electro mechanical system) (Micro-Electro-Mechanical System, MEMS) and reconstruct its polarization characteristic, gain and other relevant parameter.
The scene that the method for each embodiment of the application and device change for above-mentioned possible mobile context and/or transmission environment, provides a kind of new wireless transmission scheme.As shown in Figure 1, the wireless transmission control method of the embodiment of the present application comprises:
S120. determine the transmitting strategy of transmitter, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission.
S140. reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
No matter transmitter and how receiving equipment moves and/or what kind of change occurs transmission environment, theaomni-directional transmission pattern is a kind of transmission means that receiving equipment receives the signal that transmitter is launched that can ensure, the method of the present embodiment is by when formulating the transmitting strategy of transmitter, specify transmitter every certain time interval, enter theaomni-directional transmission pattern, thus ensure that receiving equipment receives the wireless signal of transmitter transmitting surely every certain time interval one, and then such as DOA estimation and/or channel estimating etc. can be carried out according to this received wireless signal, thus determine the direction that receiving equipment transmits as the moment of transmitter at next, to guarantee that the follow-up of communication is carried out.
Supposing that the transmitting strategy of transmitter comprises the time interval that transmitter carries out theaomni-directional transmission is Δ T, and also, per interval Δ T controls the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.Such as, at current time slots t1, determine whether transmitter current time should carry out theaomni-directional transmission by calculating current time slots and transmitter the last time at the interval (t1-t0) of the time slot t0 of theaomni-directional transmission Mode Launch signal, if (t1-t0) equal or exceed Δ T, then at least transmitting antenna of transmitter is adjusted to theaomni-directional transmission pattern.
Wherein, the time interval that transmitter carries out theaomni-directional transmission can be the immutable parameter that arranged arbitrarily by transmitter, and receiving equipment can be known or do not know this time interval; Or be a parameter of being arranged by communicating pair in advance; Also can be as will be described hereinafter, according to the parameter of transmission environment (channel conditions) rationally dynamic change.
To sum up, the method of the embodiment of the present application enters theaomni-directional transmission pattern at a certain time interval by controlling transmitter, ensure that receiving equipment can receive the signal that can be used for determining correct transmit direction, thus ensure that normally carrying out of especially communicating when communicating pair is moved and/or transmission environment changes.
Wave beam forming is a kind of important technology in smart antenna, according to system performance requirements, calculate the process of particular combination or the distribution (weight vector) transmitted, also namely determine the transmit direction of more excellent even optimum wave beam according to the transmission environment of communicating pair.In order to ensure still accurately to determine that when transmission environment changes the transmitting of transmitter transmitting antenna is sent to, compared with estimating with DOA, more preferred according to the result determination wave beam forming parameter of channel estimating.For this reason, described strategy of launching also comprises the signal type sending signal with described theaomni-directional transmission pattern, such as, specify that with described theaomni-directional transmission pattern transmission reference signal in described transmitting strategy, described reference signal is that receiving equipment is for carrying out the signal of demodulation and/or channel estimating, such as, demodulated reference signal (Demodulation Reference Signal, DMRS) in LTE standard (www.3gpp.org), at least one in the SRS signal of channel quality measurement, other any possible reference signal.Described transmission reference signal comprises only transmission reference signal and transmission and comprises the possibility of reference signal and other signal.In a kind of possible implementation, described reference signal also can refer to payload (Payload) signal, in this case, can carry out channel estimating according to the mode of any one suitable blind estimate in prior art.
In addition, in order to embody the advantage of smart antenna in directional transmissions pattern, such as, farther communication distance, the higher availability of frequency spectrum etc., the method of the embodiment of the present application is being carried out outside theaomni-directional transmission with predetermined time interval, and other moment are preferably still with directional transmissions Mode Launch wireless signal waiting for transmission.Correspondingly, the method for the embodiment of the present application also comprises:
S160. do not reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to directional transmissions pattern.Such as, at current time slots t1, calculate being spaced apart (t1-t0) of time slot t0 of current time slots and transmitter the last time at theaomni-directional transmission Mode Launch signal, if (t1-t0) do not exceed Δ T, then control at least transmitting antenna of transmitter to be adjusted to directional transmissions pattern.Under directional transmissions pattern, the transmit direction of transmitter transmitting antenna such as can be estimated according to the DOA of nearest Received signal strength, or the wave beam forming parameter of the channel estimation calculation obtained according to nearest Received signal strength determines this transmit direction.
In communication process, the role of transmitter and receiving equipment can change, and after transmitter wireless signal emission, in the process of the feedback of wait-receiving mode equipment, namely become receiving equipment, vice versa.Correspondingly, the method for the embodiment of the present application also comprises:
S110. the channel estimating of current time is carried out according to the Received signal strength of described transmitter.
Carrying out channel estimating according to Received signal strength is the more ripe technology in this area, at this not as the restriction to the embodiment of the present application, does not also repeat.
S130. at least according to the channel estimating of described current time, the wave beam forming parameter of described transmitter is determined.
Obtain according to after channel estimation results in step s 110, can according to certain algorithm compute beam figuration parameter, described algorithm is beam scanning algorithm (Grid Of Beam such as, or feature vector method (Eigen based Beamforming GOB), EBB) etc., calculated by such algorithm and can obtain a beamforming weighting vector w, the each array element of transmitter antenna can be adjusted according to w, or, except the w of current time, before also can considering, the weighing vector W in one or more moment (such as, the mean value of the weighted volumes that multiple moment calculates), to improve the accuracy of wave beam forming parameter.Such as, according to the beamforming weighting vector W of each array element of certain weight determination current time adjustment transmitter antenna
bf=a*W+b*w, wherein, a, b represent the weight of W and w respectively, can rule of thumb value.
In addition, the change due to transmission environment may be uneven, carries out theaomni-directional transmission, may cause the waste of system resource, even cause the communication disruption of long period with changeless or inappropriate time interval.Such as, as shown in Fig. 2 (a), arrange longer Fixed Time Interval Δ T1, also, transmitter per interval, Δ T1 performed a theaomni-directional transmission.At time t0, transmitter is with theaomni-directional transmission Mode Launch reference signal, receiving equipment carries out wave beam forming according to this reference signal received, and to transmitter inverse signal, after this both sides utilize directed transmitting antenna to carry out transmission of wireless signals on this basis.But, suppose that channel variation is violent, transmitter both sides after the t2 moment carries out theaomni-directional transmission again cannot make according to transmit direction before and receive direction the signal receiving the other side's transmission separately, communication disruption, until could recover communication at time t1 communicating pair, from the t1 moment, distance t2 is separated by the longer time, and also, communication will interrupt the long period, in this case, this time interval Δ T1 should suitably be shortened.On the contrary, this time interval of proper extension Δ T1 is answered.The wasting of resources caused in order to avoid this kind of situation and the harmful effect that communicating pair is caused, in a kind of possible implementation, described strategy of launching also comprises for adjusting the described channel estimating variable quantity threshold range preset launching strategy, also be, setting one represents the threshold range of the channel estimating variable quantity of transmission environment change severe degree, after the signal at every turn received from receiving equipment, difference between the channel estimating obtained in determining step S110 and the channel estimating of previous moment, and then determine the intensity of variation of transmission environment, the intensity of variation larger (acutely) of difference larger expression transmission environment, need to shorten the described time interval, the intensity of variation less (gently) of difference less expression transmission environment, suitably can increase the size in the described time interval.This variable quantity threshold range can rule of thumb be arranged.
This variable quantity threshold range can be the scope that should adjust the described time interval, and correspondingly, in a kind of possible implementation, the method for the embodiment of the present application also comprises:
S150. be in described threshold range in response to channel estimating variable quantity, adjust the described time interval.
This variable quantity threshold range also can be the scope keeping the described time interval constant.Correspondingly, in a kind of possible implementation, the method for the embodiment of the present application also comprises:
S150 '. be in outside described threshold range in response to channel estimating variable quantity, adjust the described time interval.
In addition, the method for the embodiment of the present application also can comprise:
S180. described transmitting strategy is sent.This transmission can be performed in response to initially determining described transmitting strategy, also can perform this transmission in response to each adjustment of launching strategy.And transmitter and/or the receiving equipment mode that can receive can perform this transmission.Such as, in a kind of possible implementation, the method for the embodiment of the present application is performed by the device independent of transmitter, determines after launching strategy, this transmitting strategy can be sent and inform to transmitter.In the implementation that another kind is possible, transmitter and receiving equipment can determine time interval of party of one's own according to the time interval of the theaomni-directional transmission of the other side, with the as far as possible time entering theaomni-directional transmission pattern is separately staggered such as shown in Fig. 2 (b), like this, further shorten the time of possible communication disruption, thus make full use of resource and the larger possible situation avoiding occurring communication disruption.Now, this transmitting strategy can be sent to receiving equipment in S180.
To sum up, the method for the embodiment of the present application can enter theaomni-directional transmission pattern at a certain time interval by controlling transmitter, ensures normally carrying out of communication; Also can carry out this time interval of dynamic conditioning according to the change of transmission environment and communicating pair transmitting strategy separately, can system resource be made full use of, and possible avoid the situation occurring communication disruption greatlyr.
It will be appreciated by those skilled in the art that, in the said method of the application's embodiment, the sequence number size of each step does not also mean that the priority of execution sequence, the execution sequence of each step should be determined with its function and internal logic, and should not form any restriction to the implementation process of the application's embodiment.
In addition, the embodiment of the present application additionally provides a kind of computer-readable medium, is included in the computer-readable instruction carrying out following operation when being performed: the operation performing each step of the method in above-mentioned Fig. 1 illustrated embodiment.
The embodiment of the present application additionally provides a kind of device performing above-mentioned wireless transmission control method, this device can be any device independent of transmitter and/or receiving equipment, also can be any device belonging to transmitter/receiving equipment, or this device itself is transmitter.According to the needs of the above-mentioned different executive role of this device, except each part described below, described device also comprises the communication module that can realize arbitrary equipment outside with device as required and communicate.As shown in Figure 3, the wireless transmission control device 300 of the embodiment of the present application comprises:
First determination module 320, for determining the transmitting strategy of transmitter, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission.
First control module 340, for reaching the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, controls the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
No matter transmitter and how receiving equipment moves and/or what kind of change occurs transmission environment, theaomni-directional transmission pattern is a kind of transmission means that receiving equipment receives the signal that transmitter is launched that can ensure, the device of the present embodiment is by when formulating the transmitting strategy of transmitter, specify transmitter every certain time interval, enter theaomni-directional transmission pattern, thus ensure that receiving equipment receives the wireless signal of transmitter transmitting surely every certain time interval one, and then such as DOA estimation and/or channel estimating etc. can be carried out according to this received wireless signal, thus determine the direction that receiving equipment transmits as the moment of transmitter at next, to guarantee that the follow-up of communication is carried out.
Supposing that the transmitting strategy of transmitter comprises the time interval that transmitter carries out theaomni-directional transmission is Δ T, and also, per interval Δ T controls the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.Such as, at current time slots t1, determine whether transmitter current time should carry out theaomni-directional transmission by calculating current time slots and transmitter the last time at the interval (t1-t0) of the time slot t0 of theaomni-directional transmission Mode Launch signal, if (t1-t0) equal or exceed Δ T, then at least transmitting antenna of transmitter is adjusted to theaomni-directional transmission pattern.
Wherein, the time interval that transmitter carries out theaomni-directional transmission can be the immutable parameter that arranged arbitrarily by transmitter, and receiving equipment can be known or do not know this time interval; Or be a parameter of being arranged by communicating pair in advance; Also can be as will be described hereinafter, according to the parameter of transmission environment (channel conditions) rationally dynamic change.
To sum up, the device of the embodiment of the present application enters theaomni-directional transmission pattern at a certain time interval by controlling transmitter, ensure that receiving equipment can receive the signal that can be used for determining correct transmit direction, thus ensure that normally carrying out of especially communicating when communicating pair is moved and/or transmission environment changes.
Wave beam forming is a kind of important technology in smart antenna, according to system performance requirements, calculate the process of particular combination or the distribution (weight vector) transmitted, also namely determine the transmit direction of more excellent even optimum wave beam according to the transmission environment of communicating pair.In order to ensure still accurately to determine that when transmission environment changes the transmitting of transmitter transmitting antenna is sent to, compared with estimating with DOA, more preferred according to the result determination wave beam forming parameter of channel estimating.For this reason, described strategy of launching also comprises the signal type sending signal with described theaomni-directional transmission pattern, such as, specify that with described theaomni-directional transmission pattern transmission reference signal in described transmitting strategy, described reference signal is that receiving equipment is for carrying out the signal of demodulation and/or channel estimating, such as, demodulated reference signal (Demodulation Reference Signal, DMRS) in LTE standard (www.3gpp.org), at least one in the SRS signal of channel quality measurement, other any possible reference signal.Described transmission reference signal comprises only transmission reference signal and transmission and comprises the possibility of reference signal and other signal.In a kind of possible implementation, described reference signal also can refer to payload (Payload) signal, in this case, can carry out channel estimating according to the mode of any one suitable blind estimate in prior art.
In addition, in order to embody the advantage of smart antenna in directional transmissions pattern, such as, farther communication distance, the higher availability of frequency spectrum etc., the device of the embodiment of the present application is carrying out outside theaomni-directional transmission with predetermined time interval, and other moment are preferably still with directional transmissions Mode Launch wireless signal waiting for transmission.Correspondingly, as shown in Figure 4, the device 300 of the embodiment of the present application also comprises:
Second control module 360, does not reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, controls the emission mode of described transmitter to be adjusted to directional transmissions pattern.Such as, at current time slots t1, calculate being spaced apart (t1-t0) of time slot t0 of current time slots and transmitter the last time at theaomni-directional transmission Mode Launch signal, if (t1-t0) do not exceed Δ T, then control at least transmitting antenna of transmitter to be adjusted to directional transmissions pattern.Under directional transmissions pattern, the transmit direction of transmitter transmitting antenna such as can be estimated according to the DOA of nearest Received signal strength, or the wave beam forming parameter of the channel estimation calculation obtained according to nearest Received signal strength determines this transmit direction.
In communication process, the role of transmitter and receiving equipment can change, and after transmitter wireless signal emission, in the process of the feedback of wait-receiving mode equipment, namely become receiving equipment, vice versa.Correspondingly, as shown in Figure 5, the device 300 of the embodiment of the present application also comprises:
Signal estimation module 310, for carrying out the channel estimating of current time according to the Received signal strength of described transmitter.
It is the more ripe technology in this area that signal estimation module 310 carries out channel estimating according to Received signal strength, at this not as the restriction to the embodiment of the present application, does not also repeat.
Second determination module 330, at least according to the channel estimating of described current time, determines the wave beam forming parameter of described transmitter.
Signal estimation module 310 obtains according to after channel estimation results, second determination module 330 can according to certain algorithm compute beam figuration parameter, described algorithm is beam scanning algorithm (Grid Of Beam such as, or feature vector method (Eigen based Beamforming GOB), EBB) etc., calculated by such algorithm and can obtain a beamforming weighting vector w, the each array element of transmitter antenna can be adjusted according to w, or, except the w of current time, before also can considering, the weighing vector W in one or more moment (such as, the mean value of the weighted volumes that multiple moment calculates), to improve the accuracy of wave beam forming parameter.Such as, according to the beamforming weighting vector W of each array element of certain weight determination current time adjustment transmitter antenna
bf=a*W+b*w, wherein, a, b represent the weight of W and w respectively, can rule of thumb value.
In addition, the change due to transmission environment may be uneven, carries out theaomni-directional transmission, may cause the waste of system resource, even cause the communication disruption of long period with changeless or inappropriate time interval.Such as, as shown in Fig. 2 (a), arrange longer Fixed Time Interval Δ T1, also, transmitter per interval, Δ T1 performed a theaomni-directional transmission.At time t0, transmitter is with theaomni-directional transmission Mode Launch reference signal, receiving equipment carries out wave beam forming according to this reference signal received, and to transmitter inverse signal, after this both sides utilize directed transmitting antenna to carry out transmission of wireless signals on this basis.But, suppose that channel variation is violent, transmitter both sides after the t2 moment carries out theaomni-directional transmission again cannot make according to transmit direction before and receive direction the signal receiving the other side's transmission separately, communication disruption, until could recover communication at time t1 communicating pair, from the t1 moment, distance t2 is separated by the longer time, and also, communication will interrupt the long period, in this case, this time interval Δ T1 should suitably be shortened.On the contrary, this time interval of proper extension Δ T1 is answered.The wasting of resources caused in order to avoid this kind of situation and the harmful effect that communicating pair is caused, in a kind of possible implementation, described strategy of launching also comprises for adjusting the described channel estimating variable quantity threshold range preset launching strategy, also be, setting one represents the threshold range of the channel estimating variable quantity of transmission environment change severe degree, after the signal at every turn received from receiving equipment, difference between the channel estimating that the channel estimating obtained according to current time channel estimation module 310 and previous moment obtain, determine the intensity of variation of transmission environment, the intensity of variation larger (acutely) of difference larger expression transmission environment, need to shorten the described time interval, the intensity of variation less (gently) of difference less expression transmission environment, suitably can increase the size in the described time interval.This variable quantity threshold range can rule of thumb be arranged.
This variable quantity threshold range can be the scope that should adjust the described time interval, and correspondingly, as shown in Figure 6, in a kind of possible implementation, the device 300 of the embodiment of the present application also comprises:
Adjusting module 350, for being in described threshold range in response to channel estimating variable quantity, adjusts the described time interval.
This variable quantity threshold range also can be the scope keeping the described time interval constant.Correspondingly, as shown in Figure 7, in a kind of possible implementation, the device 300 of the embodiment of the present application also comprises:
Adjusting module 350 ', for being in outside described threshold range in response to channel estimating variable quantity, adjusts the described time interval.
In addition, as shown in Figure 8, the device 300 of the embodiment of the present application also can comprise:
Sending module 380, for sending described transmitting strategy.Sending module 380 can perform this transmission in response to initially determining described transmitting strategy, also can perform this transmission in response to each adjustment of launching strategy.And sending module 380 transmitter and/or the receiving equipment mode that can receive can perform this transmission.Such as, in a kind of possible implementation, the device of the embodiment of the present application is the device independent of transmitter, therefore, determines after launching strategy, informs the transmission of this transmitting strategy to transmitter by sending module 380.In the implementation that another kind is possible, transmitter and receiving equipment can determine time interval of party of one's own according to the time interval of the theaomni-directional transmission of the other side, with the as far as possible time entering theaomni-directional transmission pattern is separately staggered such as shown in Fig. 2 (b) (length in both sides' time interval can identical also can be different), like this, further shorten the time of possible communication disruption, thus make full use of resource and the larger possible situation avoiding occurring communication disruption.Now, sending module 380 can send this transmitting strategy to receiving equipment.
To sum up, the device of the embodiment of the present application can enter theaomni-directional transmission pattern at a certain time interval by controlling transmitter, ensures normally carrying out of communication; Also can carry out this time interval of dynamic conditioning according to the change of transmission environment and communicating pair transmitting strategy separately, can system resource be made full use of, and possible avoid the situation occurring communication disruption greatlyr.
It should be noted that, when the device of the embodiment of the present application is transmitter/receiving equipment itself, it also comprises the well-known each part being carried out wireless transmission by smart antenna, such as: the control of ADC/DAC module, smart antenna and baseband processing module etc., or above-mentioned partial function module accessible site is undertaken in any portion of each part of wireless transmission by smart antenna well-known.
The structural representation of a kind of wireless transmission control device 900 that Fig. 9 provides for the embodiment of the present application, the application's specific embodiment does not limit the specific implementation of wireless transmission control device 900.As shown in Figure 9, this wireless transmission control device 900 can comprise:
Processor (processor) 910, communication interface (Communications Interface) 920, memory (memory) 930 and communication bus 940.Wherein:
Processor 910, communication interface 920 and memory 1530 complete mutual communication by communication bus 940.
Communication interface 920, for the net element communication with such as client etc.
Processor 910, for executive program 932, specifically can realize the correlation function of imaging control device in the device embodiment of above-mentioned Fig. 3.
Particularly, program 932 can comprise program code, and described program code comprises computer-managed instruction.
Processor 910 may be a central processor CPU, or specific integrated circuit ASIC (Application Specific Integrated Circuit), or is configured to the one or more integrated circuits implementing the embodiment of the present application.Program 932 specifically may be used for making described wireless transmission control device 900 perform following steps:
Determine that one of transmitter launches strategy, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission;
Reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
In program 932, the specific implementation of each step see description corresponding in the corresponding steps in above-described embodiment and unit, can be not repeated herein.Those skilled in the art can be well understood to, and for convenience and simplicity of description, the equipment of foregoing description and the specific works process of module, can describe with reference to the corresponding process in preceding method embodiment, not repeat them here.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the equipment of foregoing description and the specific works process of module, can describe with reference to the correspondence in aforementioned means embodiment, not repeat them here.
Although theme described herein provides in the general context performed in the execution on the computer systems of binding operation system and application program, but one skilled in the art will recognize that and also can realize to perform other in conjunction with the program module of other types.Generally speaking, program module comprises the structure of routine, program, assembly, data structure and the other types performing particular task or realize particular abstract data type.It will be appreciated by those skilled in the art that, this theme described herein can use other computer system configurations to put into practice, comprise portable equipment, multicomputer system, based on microprocessor or programmable consumer electronics, minicom, mainframe computer etc., also can be used in the distributed computing environment (DCE) that wherein task is performed by the remote processing devices connected by communication network.In a distributed computing environment, program module can be arranged in both of local and remote memory storage device.
Those of ordinary skill in the art can recognize, in conjunction with unit and the method step of each example of embodiment disclosed herein description, can realize with the combination of electronic hardware or computer software and electronic hardware.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not think the scope exceeding the application.
If described function using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that the technical scheme of the application contributes to original technology in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the application.And aforesaid computer read/write memory medium comprises storing physics volatibility that any mode or technology as information such as computer-readable instruction, data structure, program module or other data realize and non-volatile, removable and can not because of eastern medium.Computer read/write memory medium specifically comprises, but be not limited to, USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), Erasable Programmable Read Only Memory EPROM (EPROM), EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM), flash memory or other solid-state memory technology, CD-ROM, digital versatile disc (DVD), HD-DVD, blue light (Blue-Ray) or other light storage devices, tape, disk storage or other magnetic storage apparatus, maybe can be used for storing information needed and can by any other medium of computer access.
Above execution mode is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (15)
1. a wireless transmission control method, is characterized in that, described method comprises:
Determine that one of transmitter launches strategy, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission;
Reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
2. method according to claim 1, is characterized in that, described strategy of launching also comprises the signal type sending signal with described theaomni-directional transmission pattern.
3. method according to claim 2, is characterized in that, described transmitting strategy also comprises and sends a reference signal with described theaomni-directional transmission pattern, and described reference signal is that receiving equipment is for carrying out the signal of demodulation and/or channel estimating.
4. according to the method in any one of claims 1 to 3, it is characterized in that, described method also comprises:
Do not reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to directional transmissions pattern.
5. method according to any one of claim 1 to 4, is characterized in that, described method also comprises:
The channel estimating of current time is carried out according to a Received signal strength of described transmitter;
At least according to the channel estimating of described current time, determine a wave beam forming parameter of described transmitter.
6. method according to claim 5, is characterized in that, described strategy of launching also comprises for adjusting the described channel estimating variable quantity threshold range launching strategy.
7. method according to claim 6, is characterized in that, described method also comprises:
Be in described threshold range in response to channel estimating variable quantity, adjust the described time interval.
8. method according to claim 6, is characterized in that, described method also comprises:
Be in outside described threshold range in response to channel estimating variable quantity, adjust the described time interval.
9. method according to any one of claim 1 to 8, is characterized in that, described method also comprises:
Send described transmitting strategy.
10. a wireless transmission control device, is characterized in that, described device comprises:
One first determination module, for determining that one of transmitter launches strategy, described transmitting strategy comprises the time interval that described transmitter carries out theaomni-directional transmission;
One first control module, for reaching the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, controls the emission mode of described transmitter to be adjusted to theaomni-directional transmission pattern.
11. devices according to claim 10, is characterized in that, described device also comprises:
Do not reach the described time interval in response to current time apart from the interval of previous theaomni-directional transmission, control the emission mode of described transmitter to be adjusted to directional transmissions pattern.
12. devices according to claim 10 or 11, it is characterized in that, described device also comprises:
One channel estimation module, for carrying out the channel estimating of current time according to a Received signal strength of described transmitter;
One second determination module, at least according to the channel estimating of described current time, determines a wave beam forming parameter of described transmitter.
13. devices according to claim 12, is characterized in that, described strategy of launching also comprises for adjusting the described channel estimating variable quantity threshold range launching strategy;
Described device also comprises:
One adjusting module, for being in described threshold range in response to channel estimating variable quantity, adjusts the described time interval.
14. devices according to claim 12, is characterized in that, described strategy of launching also comprises for adjusting the described channel estimating variable quantity threshold range launching strategy;
Described device also comprises:
One adjusting module, for being in outside described threshold range in response to channel estimating variable quantity, adjusts the described time interval.
15., according to claim 10 to the device according to any one of 14, is characterized in that, described device also comprises:
One sending module, for sending described transmitting strategy.
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