CN104967499A - Device-to-device communication method and system - Google Patents
Device-to-device communication method and system Download PDFInfo
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- CN104967499A CN104967499A CN201510394527.1A CN201510394527A CN104967499A CN 104967499 A CN104967499 A CN 104967499A CN 201510394527 A CN201510394527 A CN 201510394527A CN 104967499 A CN104967499 A CN 104967499A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0675—Space-time coding characterised by the signaling
- H04L1/0693—Partial feedback, e.g. partial channel state information [CSI]
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Abstract
The embodiment of the invention provides a device-to-device communication method and system. According to the method and system of the invention, signal quality information of signals of a next time period which has not arrived can be inferred according to signal quality information of signals of a time period where a current time point is located, and communication is performed through using a matched communication mode. The communication mode is selected according to the predicted signal quality information of the next time period, and therefore, compared with a mode in which current signal quality information is adopted in the prior art, the device-to-device communication method and system can assist in avoiding time lag of channel state information. The communication mode adopted in the method of the invention is more matched with actual channel state information, and therefore, communication quality can be effectively prompted.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the method and system that equipment room carries out communicating.
Background technology
Because the train travelled often will pass cavern, stride across city, the signal strength signal intensity of the mobile phone therefore on train often has greatly changed, off and on.Meanwhile, owing to using driven by power, therefore train will through one group of electric pole every a segment distance, and this also result in the change of mobile phone signal strength signal intensity on train.
In order to improve the quality of mobile phone signal on train, prior art obtains current channel condition information (CSI at signal receiving end, Channel State Information) and feed back to signal sending end, signal sending end adjusts the messaging parameters such as order of modulation, code check, transmit power level according to CSI.But because train translational speed comparatively fast causes fast change of channel, therefore to obtain current CSI often out-of-date when arriving signal transmitting terminal for signal receiving end, this just makes not mate with actual CSI according to the messaging parameter of the CSI adjustment received, and causes the lifting of the quality to mobile phone signal on train limited.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of equipment room to carry out the method and system communicated, with cue quality.
For achieving the above object, the embodiment of the invention discloses a kind of method that equipment room carries out communicating, being applied to apparatus for transmitting signal, described apparatus for transmitting signal is communicated to connect by channel and signal receiver, and described method comprises:
Obtain the signal quality information of multiple signal that described signal receiver receives in the first time period at current time place;
The fading status of multiple signals that described signal receiver receives in first time period is determined according to the situation of change of the signal quality information of described multiple signal;
When determined fading status is for periodically declining, declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving; Within described second time period, the communication mode that the signal quality information determined with derivation mates is used to communicate with described signal receiver;
When determined fading status is aperiodicity decline, determine according to the signal quality information of described multiple signal the channel condition information that signal that described signal receiver receives in described first time period is corresponding; According to the channel status transition probability preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding; Use and communicate with described signal receiver with the communication mode that the channel condition information determined mates, wherein, described 3rd time period is adjacent with described first time period.
Optionally, described signal quality information is signal to noise ratio or power.
Optionally, the communication mode that the signal quality information that described use is determined with derivation mates communicates with described signal receiver, comprising:
When the signal quality information that described derivation is determined is not less than first threshold, the modulation coding mode of high-order is used to communicate with described signal receiver;
When the signal quality information that described derivation is determined is lower than described first threshold, the modulation coding mode of low order is used to communicate with described signal receiver, or, communicate with described signal receiver again after waiting for for the 4th time period.
Optionally, the channel condition information that the signal received in determined the 3rd time period do not arrived is corresponding is shadow-free state, slight shadow state or complete shadow state,
The communication mode that described use and the channel condition information determined mate communicates with described signal receiver, comprising:
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is shadow-free state, the modulation coding mode of high-order is used to communicate with described signal receiver;
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is slight shadow state, the modulation coding mode of low order is used to communicate with described signal receiver;
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is complete shadow state, communicate with described signal receiver again after waiting for for the 4th time period.
Optionally, describedly decline by the periodicity of signal quality information when determined fading status is for periodically declining, the signal quality information of the signal of reception in the second time period determining not arrive of deriving, comprising:
When determined fading status is for periodically declining, obtain the fading period of described signal quality information in described first time period and duty ratio;
Respectively the fading period obtained and duty ratio are inputted the iterative formula based on the linear prediction filter of Minimum Mean Square Error
In, obtain fading period and the duty ratio of the second time period do not arrived interior signal received, wherein, w (n) is the weight coefficient of n moment linear prediction filter, μ is for iterating step-length, e (n) exports for linear prediction filter and expects the difference between signal, the input that x (n) is linear prediction filter;
Based on fading period and the duty ratio of the signal received in described second time period obtained, obtain the signal quality information of the signal received in described second time period.
A kind of equipment room carries out the system communicated, be applied to apparatus for transmitting signal, described apparatus for transmitting signal is communicated to connect by channel and signal receiver, and described system comprises: signal quality obtain unit, fading status determining unit, the cycle decline processing unit and aperiodic processing unit
Described signal quality obtains unit, for obtaining the signal quality information of multiple signal that described signal receiver receives in the first time period at current time place;
Described fading status determining unit, the situation of change for the signal quality information according to described multiple signal determines the fading status of multiple signals that described signal receiver receives in first time period;
Described cycle decline processing unit, for when determined fading status is for periodically declining, is declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving; Within described second time period, the communication mode that the signal quality information determined with derivation mates is used to communicate with described signal receiver;
Described aperiodic, processing unit, during for being aperiodicity decline at determined fading status, determined according to the signal quality information of described multiple signal the channel condition information that signal that described signal receiver receives in described first time period is corresponding; According to the channel status transition probability preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding; Use and communicate with described signal receiver with the communication mode that the channel condition information determined mates, wherein, described 3rd time period is adjacent with described first time period.
Optionally, described signal quality information is signal to noise ratio or power.
Optionally, described cycle decline processing unit, comprising: quality infers subelement, the first communicator unit and second communication subelement,
Described quality infers subelement, for when determined fading status is for periodically declining, is declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving;
Described first communicator unit, within described second time period, when the signal quality information that described derivation is determined is not less than first threshold, uses the modulation coding mode of high-order to communicate with described signal receiver;
Described second communication subelement, for within described second time period, when the signal quality information that described derivation is determined is lower than described first threshold, the modulation coding mode of low order is used to communicate with described signal receiver, or, communicate with described signal receiver again after waiting for for the 4th time period.
Optionally, the channel condition information that the signal received in the 3rd time period that what described aperiodic, processing unit was determined do not arrive is corresponding is shadow-free state, slight shadow state or shadow state completely,
Described aperiodic, processing unit, comprising: channel status determination subelement, channel status infer subelement, third communication subelement, the 4th communication subelement and five-way letter subelement,
Described channel status determination subelement, during for being aperiodicity decline at determined fading status, determines according to described signal quality information the channel condition information that signal that described signal receiver receives in described first time period is corresponding;
Described channel status infers subelement, and for the channel status transition probability that basis is preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding, wherein, described 3rd time period is adjacent with described first time period;
Described third communication subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is shadow-free state, uses the modulation coding mode of high-order to communicate with described signal receiver;
Described 4th communication subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is slight shadow state, uses the modulation coding mode of low order to communicate with described signal receiver;
Described five-way letter subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is complete shadow state, communicates with described signal receiver after waiting for for the 4th time period again.
Optionally, described cycle decline processing unit, comprising: gain of parameter subelement, calculation of parameter subelement, quality obtain subelement and the 6th communicator unit,
Described gain of parameter subelement, for when determined fading status is for periodically declining, obtains the fading period of described signal quality information in described first time period and duty ratio;
Described calculation of parameter subelement, for inputting the iterative formula based on the linear prediction filter of Minimum Mean Square Error by the fading period obtained and duty ratio respectively
In, obtain fading period and the duty ratio of the second time period do not arrived interior signal received, wherein, w (n) is the weight coefficient of n moment linear prediction filter, μ is for iterating step-length, e (n) exports for linear prediction filter and expects the difference between signal, the input that x (n) is linear prediction filter;
Described quality obtains subelement, for based on the fading period of the signal received in described second time period obtained and duty ratio, obtains the signal quality information of the signal received in described second time period;
Described 6th communicator unit, within described second time period, uses the communication mode that the signal quality information determined with derivation mates to communicate with described signal receiver.
A kind of equipment room that the embodiment of the present invention provides carries out the method and system communicated, the signal quality information of the signal of the subsequent time period do not arrived can be inferred according to the signal quality information of the signal of the time period at current time place, and use the communication mode matched to communicate.Because the present invention chooses communication mode according to the signal quality information of the subsequent time period of prediction, therefore for the mode that prior art uses current signal quality information, avoid the out-of-date problem of channel condition information, the communication mode that the present invention adopts mates more with actual channel condition information, therefore effectively can point out communication quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 carries out the flow chart of the method communicated for a kind of equipment room that the embodiment of the present invention provides;
The schematic diagram of the satellite-signal power received in the high ferro running that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the embodiment of the present invention theory provided and the cycle comparison diagram preset;
The theory that Fig. 4 provides for the embodiment of the present invention is schemed with the power contrast preset;
Fig. 5 carries out the structural representation of the system communicated for a kind of equipment room that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, a kind of equipment room that the embodiment of the present invention provides carries out the method communicated, and is applied to apparatus for transmitting signal, and described apparatus for transmitting signal is communicated to connect by channel and signal receiver, and the method can comprise:
S100, obtain the signal quality information of multiple signal that described signal receiver receives in the first time period at current time place;
Wherein, described signal quality information can be signal to noise ratio or power.Preferably, signal quality information is signal to noise ratio, certainly, after acquisition power, also can obtain signal to noise ratio by power calculation.
Wherein, apparatus for transmitting signal can be the ground station in communication system, and accordingly, signal receiver is the mobile radio station on train.Now, ground station sends signal to the mobile radio station on train.Certainly, apparatus for transmitting signal also can be the mobile radio station on train, and accordingly, signal receiver is the ground station in communication system.Now, the mobile radio station ground station on train sends signal.The present invention is particularly useful for the communication between the mobile radio station in ground station and high ferro.
Certainly, carry out for the equipment that communicates for other, be equally applicable to the present invention, range of application of the present invention is not limited to the mobile radio station on ground station and train.
S200, determine the fading status of multiple signals that described signal receiver receives in first time period according to the situation of change of the signal quality information of described multiple signal;
Certainly, first S200 can carry out data screening to the signal quality information that S100 obtains, such as: deleted by the signal quality information being evident as noise by predetermined threshold value.
When there being object to block, the signal quality of signal will be deteriorated, and occurs decline.The fluctuations of signal quality in this time period can be found out by the fading status of the signal received in first time period.
S300, when determined fading status is for periodically declining, decline by the periodicity of signal quality information, the signal quality information of the signal of reception in the second time period determining not arrive of deriving; Within described second time period, the communication mode that the signal quality information determined with derivation mates is used to communicate with described signal receiver;
For train, because meeting is through too much organizing the identical electric pole of spacing, when therefore sending signal to the mobile radio station on train when ground station, the signal quality information of the signal that mobile radio station receives will in periodically decline.Equally, when the mobile radio station on train sends signal to ground station, the signal quality information of the signal of ground station reception will in periodically decline.Because its decline is in periodically, the situation of change of the signal quality information signal in subsequent time period therefore can be inferred.
Concrete, its fading model can be as follows:
Wherein,
a is the distance of electric pole to the mobile radio station on train, and b is the distance of electric pole to satellite, and d is that electric pole affects distance to signal, and λ is signal wavelength, and x represents the coordinate of train displacement.
Describedly decline by the periodicity of signal quality information in step S300 when determined fading status is for periodically declining, the signal quality information of the signal of the second time period interior reception determining not arrive of deriving, comprising:
When determined fading status is for periodically declining, obtain the fading period of described signal quality information in described first time period and duty ratio;
Respectively the fading period obtained and duty ratio are inputted the iterative formula based on the linear prediction filter of Minimum Mean Square Error
In, obtain fading period and the duty ratio of the second time period do not arrived interior signal received, wherein, w (n) is the weight coefficient of n moment linear prediction filter, μ is for iterating step-length, e (n) exports for linear prediction filter and expects the difference between signal, the input that x (n) is linear prediction filter;
Based on fading period and the duty ratio of the signal received in described second time period obtained, obtain the signal quality information of the signal received in described second time period.
Wherein, use the communication mode that the signal quality information determined with derivation mates to communicate with described signal receiver in step S300, can comprise:
When the signal quality information that described derivation is determined is not less than first threshold, the modulation coding mode of high-order is used to communicate with described signal receiver;
When the signal quality information that described derivation is determined is lower than described first threshold, the modulation coding mode of low order is used to communicate with described signal receiver, or, communicate with described signal receiver again after waiting for for the 4th time period.
The modulation coding mode of high-order can carry more information, and anti-interference is poor.The information that the modulation coding mode of low order carries is less, and anti-interference is better.Therefore, when the signal quality information determined when deriving is poor, the modulation coding mode of the good low order of anti-interference can be used to communicate with described signal receiver.Certainly, when the signal quality information determined when deriving is poor, communicate with described signal receiver again after also can waiting for a period of time.When the signal quality information determined when deriving is better, the modulation coding mode of the high-order that can carry more information can be used to communicate with described signal receiver, to provide high-quality communication process.
In actual applications, for the S300 signal quality information determined of deriving, guard time can be set, to reduce packet loss.
S400, when determined fading status is aperiodicity decline, determine according to the signal quality information of described multiple signal the channel condition information that signal that described signal receiver receives in described first time period is corresponding; According to the channel status transition probability preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding; Use and communicate with described signal receiver with the communication mode that the channel condition information determined mates, wherein, described 3rd time period is adjacent with described first time period.
Wherein, the channel status transition probability preset can obtain according to historical data statistics, and this channel status transition probability preset can upgrade according to up-to-date state transitions situation.
Be understandable that, when train is through cavern, city, the signal quality information of the signal in channel will decline in aperiodicity.When train is through cavern, channel condition information is complete shadow state; When train is through city, channel condition information is slight shadow state; When train is through grassland, channel condition information is shadow-free state.
Transfer between above-mentioned three kinds of states can use markov three condition to determine.
Wherein, the channel condition information that the signal received in determined the 3rd time period do not arrived is corresponding is shadow-free state, slight shadow state or complete shadow state, use in step S400 and communicate with described signal receiver with the communication mode that the channel condition information determined mates, can comprise:
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is shadow-free state, the modulation coding mode of high-order is used to communicate with described signal receiver;
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is slight shadow state, the modulation coding mode of low order is used to communicate with described signal receiver;
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is complete shadow state, communicate with described signal receiver again after waiting for for the 4th time period.
The present invention emulates for high ferro, the change of the satellite-signal power received in high ferro running as shown in Figure 2, after irrational data obvious in Fig. 2 being removed by setting threshold value, from the high ferro Cyclical power that remaining data can be predicted, as shown in Figure 3.Also there is in Fig. 3 theoretical high ferro power cycle, by contrast, basically identical both visible.And then the present invention just can predict the satellite-signal power received in the process that in subsequent time period, high ferro is run, as shown in Figure 4, visible, power and the theoretical power (horse-power) of the present invention's prediction are basically identical.Logical overpowering cyclic variation, just can determine the unshielding time in its cycle and break period.In order to keep the consistency of predicted power and theoretical power (horse-power) further, as shown in Figure 4, the dynamic protection time can also be added.
A kind of equipment room that the embodiment of the present invention provides carries out the method communicated, the signal quality information of the signal of the subsequent time period do not arrived can be inferred according to the signal quality information of the signal of the time period at current time place, and use the communication mode matched to communicate.Because the present invention chooses communication mode according to the signal quality information of the subsequent time period of prediction, therefore for the mode that prior art uses current signal quality information, avoid the out-of-date problem of channel condition information, the communication mode that the present invention adopts mates more with actual channel condition information, therefore effectively can point out communication quality.
Corresponding with said method embodiment, present invention also offers the system that a kind of equipment room carries out communicating.
As shown in Figure 5, a kind of equipment room that the embodiment of the present invention provides carries out the system communicated, be applied to apparatus for transmitting signal, described apparatus for transmitting signal is communicated to connect by channel and signal receiver, this system can comprise: signal quality obtain unit 100, fading status determining unit 200, cycle decline processing unit 300 and aperiodic processing unit 400
Described signal quality obtains unit 100, for obtaining the signal quality information of multiple signal that described signal receiver receives in the first time period at current time place;
Wherein, described signal quality information can be signal to noise ratio or power.
Described fading status determining unit 200, the situation of change for the signal quality information according to described multiple signal determines the fading status of multiple signals that described signal receiver receives in first time period;
Described cycle decline processing unit 300, for when determined fading status is for periodically declining, is declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving; Within described second time period, the communication mode that the signal quality information determined with derivation mates is used to communicate with described signal receiver;
In other embodiments of the present invention, described cycle decline processing unit 300, can comprise: quality infers subelement, the first communicator unit and second communication subelement,
Described quality infers subelement, for when determined fading status is for periodically declining, is declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving;
Described first communicator unit, within described second time period, when the signal quality information that described derivation is determined is not less than first threshold, uses the modulation coding mode of high-order to communicate with described signal receiver;
Described second communication subelement, for within described second time period, when the signal quality information that described derivation is determined is lower than described first threshold, the modulation coding mode of low order is used to communicate with described signal receiver, or, communicate with described signal receiver again after waiting for for the 4th time period.
Wherein, described cycle decline processing unit 300, can comprise: gain of parameter subelement, calculation of parameter subelement, quality obtain subelement and the 6th communicator unit,
Described gain of parameter subelement, for when determined fading status is for periodically declining, obtains the fading period of described signal quality information in described first time period and duty ratio;
Described calculation of parameter subelement, for inputting the iterative formula based on the linear prediction filter of Minimum Mean Square Error by the fading period obtained and duty ratio respectively
In, obtain fading period and the duty ratio of the second time period do not arrived interior signal received, wherein, w (n) is the weight coefficient of n moment linear prediction filter, μ is for iterating step-length, e (n) exports for linear prediction filter and expects the difference between signal, the input that x (n) is linear prediction filter;
Described quality obtains subelement, for based on the fading period of the signal received in described second time period obtained and duty ratio, obtains the signal quality information of the signal received in described second time period;
Described 6th communicator unit, within described second time period, uses the communication mode that the signal quality information determined with derivation mates to communicate with described signal receiver.
Described aperiodic, processing unit 400, during for being aperiodicity decline at determined fading status, determined according to the signal quality information of described multiple signal the channel condition information that signal that described signal receiver receives in described first time period is corresponding; According to the channel status transition probability preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding; Use and communicate with described signal receiver with the communication mode that the channel condition information determined mates, wherein, described 3rd time period is adjacent with described first time period.
Wherein, the channel condition information that the signal received in the 3rd time period do not arrived that described aperiodic, processing unit 400 was determined is corresponding is shadow-free state, slight shadow state or shadow state completely,
Described aperiodic, processing unit 400, can comprise: channel status determination subelement, channel status infer subelement, third communication subelement, the 4th communication subelement and five-way letter subelement,
Described channel status determination subelement, during for being aperiodicity decline at determined fading status, determines according to described signal quality information the channel condition information that signal that described signal receiver receives in described first time period is corresponding;
Described channel status infers subelement, and for the channel status transition probability that basis is preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding, wherein, described 3rd time period is adjacent with described first time period;
Described third communication subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is shadow-free state, uses the modulation coding mode of high-order to communicate with described signal receiver;
Described 4th communication subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is slight shadow state, uses the modulation coding mode of low order to communicate with described signal receiver;
Described five-way letter subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is complete shadow state, communicates with described signal receiver after waiting for for the 4th time period again.
A kind of equipment room that the embodiment of the present invention provides carries out the system communicated, the signal quality information of the signal of the subsequent time period do not arrived can be inferred according to the signal quality information of the signal of the time period at current time place, and use the communication mode matched to communicate.Because the present invention chooses communication mode according to the signal quality information of the subsequent time period of prediction, therefore for the mode that prior art uses current signal quality information, avoid the out-of-date problem of channel condition information, the communication mode that the present invention adopts mates more with actual channel condition information, therefore effectively can point out communication quality.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, 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.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.
Each embodiment in this specification all adopts relevant mode to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (10)
1. equipment room carries out the method that communicates, and it is characterized in that, be applied to apparatus for transmitting signal, described apparatus for transmitting signal is communicated to connect by channel and signal receiver, and described method comprises:
Obtain the signal quality information of multiple signal that described signal receiver receives in the first time period at current time place;
The fading status of multiple signals that described signal receiver receives in first time period is determined according to the situation of change of the signal quality information of described multiple signal;
When determined fading status is for periodically declining, declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving; Within described second time period, the communication mode that the signal quality information determined with derivation mates is used to communicate with described signal receiver;
When determined fading status is aperiodicity decline, determine according to the signal quality information of described multiple signal the channel condition information that signal that described signal receiver receives in described first time period is corresponding; According to the channel status transition probability preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding; Use and communicate with described signal receiver with the communication mode that the channel condition information determined mates, wherein, described 3rd time period is adjacent with described first time period.
2. method according to claim 1, is characterized in that, described signal quality information is signal to noise ratio or power.
3. method according to claim 1, is characterized in that, the communication mode that the signal quality information that described use is determined with derivation mates communicates with described signal receiver, comprising:
When the signal quality information that described derivation is determined is not less than first threshold, the modulation coding mode of high-order is used to communicate with described signal receiver;
When the signal quality information that described derivation is determined is lower than described first threshold, the modulation coding mode of low order is used to communicate with described signal receiver, or, communicate with described signal receiver again after waiting for for the 4th time period.
4. according to the method in any one of claims 1 to 3, it is characterized in that, the channel condition information that the signal received in determined the 3rd time period do not arrived is corresponding is shadow-free state, slight shadow state or complete shadow state,
The communication mode that described use and the channel condition information determined mate communicates with described signal receiver, comprising:
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is shadow-free state, the modulation coding mode of high-order is used to communicate with described signal receiver;
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is slight shadow state, the modulation coding mode of low order is used to communicate with described signal receiver;
When the channel condition information that the signal received within determined the 3rd time period do not arrived is corresponding is complete shadow state, communicate with described signal receiver again after waiting for for the 4th time period.
5. according to the method in any one of claims 1 to 3, it is characterized in that, described when determined fading status is for periodically declining, declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received do not arrived is determined in derivation, comprising:
When determined fading status is for periodically declining, obtain the fading period of described signal quality information in described first time period and duty ratio;
Respectively the fading period obtained and duty ratio are inputted the iterative formula based on the linear prediction filter of Minimum Mean Square Error
In, obtain fading period and the duty ratio of the second time period do not arrived interior signal received, wherein, w (n) is the weight coefficient of n moment linear prediction filter, μ is for iterating step-length, e (n) exports for linear prediction filter and expects the difference between signal, the input that x (n) is linear prediction filter;
Based on fading period and the duty ratio of the signal received in described second time period obtained, obtain the signal quality information of the signal received in described second time period.
6. the equipment room system of carrying out communicating, it is characterized in that, be applied to apparatus for transmitting signal, described apparatus for transmitting signal is communicated to connect by channel and signal receiver, described system comprises: signal quality obtain unit, fading status determining unit, the cycle decline processing unit and aperiodic processing unit
Described signal quality obtains unit, for obtaining the signal quality information of multiple signal that described signal receiver receives in the first time period at current time place;
Described fading status determining unit, the situation of change for the signal quality information according to described multiple signal determines the fading status of multiple signals that described signal receiver receives in first time period;
Described cycle decline processing unit, for when determined fading status is for periodically declining, is declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving; Within described second time period, the communication mode that the signal quality information determined with derivation mates is used to communicate with described signal receiver;
Described aperiodic, processing unit, during for being aperiodicity decline at determined fading status, determined according to the signal quality information of described multiple signal the channel condition information that signal that described signal receiver receives in described first time period is corresponding; According to the channel status transition probability preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding; Use and communicate with described signal receiver with the communication mode that the channel condition information determined mates, wherein, described 3rd time period is adjacent with described first time period.
7. system according to claim 6, is characterized in that, described signal quality information is signal to noise ratio or power.
8. system according to claim 6, is characterized in that, described cycle decline processing unit, comprising: quality infers subelement, the first communicator unit and second communication subelement,
Described quality infers subelement, for when determined fading status is for periodically declining, is declined by the periodicity of signal quality information, the signal quality information of the second time period interior signal received determining not arrive of deriving;
Described first communicator unit, within described second time period, when the signal quality information that described derivation is determined is not less than first threshold, uses the modulation coding mode of high-order to communicate with described signal receiver;
Described second communication subelement, for within described second time period, when the signal quality information that described derivation is determined is lower than described first threshold, the modulation coding mode of low order is used to communicate with described signal receiver, or, communicate with described signal receiver again after waiting for for the 4th time period.
9. the system according to any one of claim 6 to 8, it is characterized in that, the channel condition information that the signal received in the 3rd time period that what described aperiodic, processing unit was determined do not arrive is corresponding is shadow-free state, slight shadow state or shadow state completely
Described aperiodic, processing unit, comprising: channel status determination subelement, channel status infer subelement, third communication subelement, the 4th communication subelement and five-way letter subelement,
Described channel status determination subelement, during for being aperiodicity decline at determined fading status, determines according to described signal quality information the channel condition information that signal that described signal receiver receives in described first time period is corresponding;
Described channel status infers subelement, and for the channel status transition probability that basis is preset, determine the channel condition information that the signal of the 3rd time period interior reception do not arrived is corresponding, wherein, described 3rd time period is adjacent with described first time period;
Described third communication subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is shadow-free state, uses the modulation coding mode of high-order to communicate with described signal receiver;
Described 4th communication subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is slight shadow state, uses the modulation coding mode of low order to communicate with described signal receiver;
Described five-way letter subelement, when the channel condition information that the signal for receiving within determined the 3rd time period do not arrived is corresponding is complete shadow state, communicates with described signal receiver after waiting for for the 4th time period again.
10. the system according to any one of claim 6 to 8, is characterized in that, described cycle decline processing unit, comprising: gain of parameter subelement, calculation of parameter subelement, quality obtain subelement and the 6th communicator unit,
Described gain of parameter subelement, for when determined fading status is for periodically declining, obtains the fading period of described signal quality information in described first time period and duty ratio;
Described calculation of parameter subelement, for inputting the iterative formula based on the linear prediction filter of Minimum Mean Square Error by the fading period obtained and duty ratio respectively
In, obtain fading period and the duty ratio of the second time period do not arrived interior signal received, wherein, w (n) is the weight coefficient of n moment linear prediction filter, μ is for iterating step-length, e (n) exports for linear prediction filter and expects the difference between signal, the input that x (n) is linear prediction filter;
Described quality obtains subelement, for based on the fading period of the signal received in described second time period obtained and duty ratio, obtains the signal quality information of the signal received in described second time period;
Described 6th communicator unit, within described second time period, uses the communication mode that the signal quality information determined with derivation mates to communicate with described signal receiver.
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