CN108462961B - Wireless channel characteristic data preprocessing method and device - Google Patents
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- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
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Abstract
The invention provides a wireless channel characteristic data preprocessing method and a device, after a group of wireless channel characteristic data including at least one wireless channel characteristic value is obtained, a first parameter and a second parameter of the at least one wireless channel characteristic value are calculated, a comparison parameter is obtained according to the first parameter, the second parameter is compared with the comparison parameter to obtain a comparison result, the at least one wireless channel characteristic value is processed according to the comparison result, if the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, the wireless channel characteristic value has poor dynamics, so the wireless channel characteristic value is abandoned, and if the comparison result shows that the value of the second parameter is greater than the value of the comparison parameter, the wireless channel characteristic value has good dynamics, so the wireless channel characteristic value with good dynamics can be reserved, so a symmetric key can be generated by the wireless channel characteristic value with good dynamics, the difficulty of generating the symmetric key is reduced.
Description
Technical Field
The invention belongs to the technical field of information security, and particularly relates to a wireless channel characteristic data preprocessing method and device.
Background
With the development of radio communication technology, the security requirement in the communication process is higher and higher, and in recent years, the one-way compression functions MD (Message Digest Algorithm) and SHA (Secure Hash Algorithm) that have been used have proved to have a security risk. Therefore, a brand new cryptology system is generated, namely a symmetric key is generated by utilizing the wireless channel characteristic data, and the working principle of the new cryptology system is as follows: the wireless channel characteristic values in a group of wireless channel characteristic data are quantized into binary bit sequences, the binary bit sequences obtained by two communication parties are consistent through an information negotiation technology, then information leaked in the information negotiation process is eliminated through a privacy enhancement technology, and finally a symmetric key is generated.
However, the change situation of the wireless channel characteristic value is closely related to the motion information such as the motion state of the communication device and the environment where the communication device is located, which results in the decrease of the dynamics of the wireless channel characteristic value, thereby increasing the difficulty of generating the symmetric key.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method and an apparatus for preprocessing wireless channel characteristic data, so as to generate a symmetric key by using a wireless channel characteristic value with good dynamics, thereby reducing the difficulty of generating the symmetric key. The technical scheme is as follows:
the invention provides a wireless channel characteristic data preprocessing method, which comprises the following steps:
acquiring a group of wireless channel characteristic data, wherein the wireless channel characteristic data comprises at least one wireless channel characteristic value;
calculating a first parameter and a second parameter of the at least one wireless channel characteristic value, wherein the first parameter is used for indicating the concentration trend of the at least one wireless channel characteristic value, and the second parameter is used for indicating the dispersion degree of the at least one wireless channel characteristic value;
obtaining a comparison parameter according to the first parameter, wherein the comparison parameter is used for judging the dynamic property of the at least one wireless channel characteristic value;
comparing the second parameter with the comparison parameter to obtain a comparison result;
and processing the at least one wireless channel characteristic value according to the comparison result.
Preferably, the processing the at least one radio channel characteristic value according to the comparison result includes:
when the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, sending a first request message to a communication opposite side, wherein the first request message is used for requesting to abandon the at least one wireless channel characteristic value;
and after receiving a first confirmation message sent by the communication opposite side, giving up the at least one wireless channel characteristic value.
Preferably, the processing the at least one radio channel characteristic value according to the comparison result further includes:
when the comparison result shows that the value of the second parameter is larger than the value of the comparison parameter, sending a second request message to the communication counterpart, wherein the second request message is used for requesting to reserve the at least one wireless channel characteristic value;
after receiving the first confirmation message sent by the communication opposite side, abandoning the at least one wireless channel characteristic value;
and after receiving a second confirmation message sent by the communication opposite side, reserving the at least one wireless channel characteristic value.
Preferably, the first parameter is a mean value of all wireless channel characteristic values in the acquired wireless channel characteristic data, and the second parameter is a standard deviation of all wireless channel characteristic values in the acquired wireless channel characteristic data.
Preferably, obtaining a comparison parameter according to the first parameter includes: and obtaining the comparison parameter according to the first parameter and a preset weight, wherein the value of the preset weight is 0.1.
The invention also provides a wireless channel characteristic data preprocessing device, which comprises:
an obtaining unit, configured to obtain a set of wireless channel characteristic data, where the wireless channel characteristic data includes at least one wireless channel characteristic value;
a calculating unit, configured to calculate a first parameter and a second parameter of the at least one radio channel characteristic value, where the first parameter is used to indicate a concentration trend of the at least one radio channel characteristic value, and the second parameter is used to indicate a dispersion degree of the at least one radio channel characteristic value;
an obtaining unit, configured to obtain a comparison parameter according to the first parameter, where the comparison parameter is used to determine a dynamic property of the at least one wireless channel characteristic value;
the comparison unit is used for comparing the second parameter with the comparison parameter to obtain a comparison result;
and the processing unit is used for processing the at least one wireless channel characteristic value according to the comparison result.
Preferably, the processing unit includes:
a sending subunit, configured to send a first request packet to a communication peer when the comparison result indicates that the value of the second parameter is smaller than or equal to the value of the comparison parameter, where the first request packet is used to request to discard the at least one radio channel characteristic value;
and the first processing subunit is used for giving up the at least one wireless channel characteristic value after receiving a first confirmation message sent by the communication counterpart.
Preferably, the sending subunit is further configured to send a second request packet to the communication peer when the comparison result indicates that the value of the second parameter is greater than the value of the comparison parameter, where the second request packet is used to request to reserve the at least one characteristic value of the wireless channel;
the processing unit further comprises: and the second processing subunit is used for reserving the at least one wireless channel characteristic value after receiving a second confirmation message sent by the communication counterpart.
Preferably, the first parameter is a mean value of all wireless channel characteristic values in the acquired wireless channel characteristic data, and the second parameter is a standard deviation of all wireless channel characteristic values in the acquired wireless channel characteristic data.
Preferably, the obtaining unit is configured to obtain the comparison parameter according to the first parameter and a preset weight, where a value of the preset weight is 0.1.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
after a group of wireless channel characteristic data including at least one wireless channel characteristic value is obtained, a first parameter and a second parameter of the at least one wireless channel characteristic value are calculated, a comparison parameter is obtained according to the first parameter, the second parameter is compared with the comparison parameter to obtain a comparison result, the at least one wireless channel characteristic value is processed according to the comparison result, if the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, the obtained wireless channel characteristic value has poor dynamics, the obtained wireless channel characteristic value can be abandoned, and if the comparison result shows that the value of the second parameter is greater than the value of the comparison parameter, the obtained wireless channel characteristic value has good dynamics, the obtained wireless channel characteristic value can be reserved, and the wireless channel characteristic value with good dynamics can be adopted to generate a symmetric key, the difficulty of generating the symmetric key is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of a method for preprocessing wireless channel characteristic data according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a wireless channel characteristic data preprocessing apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a processing unit in the wireless channel characteristic data preprocessing apparatus according to an embodiment of the present invention.
Detailed Description
The idea of the wireless channel characteristic data preprocessing method and device provided by the embodiment of the invention is as follows: when the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, the obtained wireless channel characteristic value has poor dynamic property, so that the obtained wireless channel characteristic value can be abandoned, and when the comparison result shows that the value of the second parameter is greater than the value of the comparison parameter, the obtained wireless channel characteristic value has good dynamic property, so that the obtained wireless channel characteristic value can be reserved, so that a symmetric key can be generated by adopting the wireless channel characteristic value with good dynamic property, the difficulty of generating the symmetric key is reduced.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, a flowchart of a method for preprocessing wireless channel characteristic data according to an embodiment of the present invention is shown, so that a symmetric key can be generated by using a wireless channel characteristic value with good dynamics, and difficulty in generating the symmetric key is reduced. The wireless channel characteristic data preprocessing method can comprise the following steps:
101: a set of radio channel characteristic data is obtained, wherein the radio channel characteristic data comprises at least one radio channel characteristic value. For example, according to the communication requirements of the two communication parties, one device of the two communication parties obtains a set of channel characteristic data from the characteristic pool, the set of channel characteristic data comprises 64 wireless channel characteristic values, for example, the two communication partiesRadio A, which may be an airport tower, and radio B, which may be an airplane, radio A may obtain a set of 64 wireless channel characteristic values from a pool of characteristics, each of which is scored as
Indicates the i-th wireless channel characteristic value in the wireless channel characteristic data acquired by the radio apparatus a this time. Also for radio B, a set of 64 radio channel characteristics may be obtained from the pool of characteristics, and each radio channel characteristic may be noted as
The i-th radio channel characteristic value in the radio channel characteristic data acquired this time by the radio apparatus B is indicated.
For how to obtain the characteristic values of each wireless channel in the characteristic pool, how to obtain the quantity and what type of the characteristic values of the wireless channel according to the communication requirements of both communication parties, please refer to the prior art, and the embodiments of the present invention are not further described.
102: a first parameter and a second parameter of the at least one radio channel characteristic value are calculated, wherein the first parameter is used for indicating a concentration trend of the at least one radio channel characteristic value, and the second parameter is used for indicating a dispersion degree of the at least one radio channel characteristic value.
For example, the first parameter is an average (e.g., an arithmetic average) of all the radio channel characteristic values in the acquired radio channel characteristic data, and the second parameter is a standard deviation of all the radio channel characteristic values in the acquired radio channel characteristic data.
In the embodiment of the present invention, the standard deviation is calculated in the following manner:
wherein CH i For the ith wireless channel characteristic value in the acquired wireless channel characteristic data, N is the total number of wireless channel characteristic values included in the acquired wireless channel characteristic data, and mu isAnd averaging all the wireless channel characteristic values in the acquired wireless channel characteristic data.
Taking the example that the acquired wireless channel characteristic data includes 64 wireless channel characteristic values, for the wireless device a, the standard deviation is calculated as follows:
μ A is the average of all the wireless channel characteristic values in the wireless channel characteristic data acquired by the radio device a. Similarly for radio B, the standard deviation is calculated as:
μ B is the average of all the wireless channel characteristic values in the wireless channel characteristic data acquired by the radio apparatus B.
103: and obtaining a comparison parameter according to the first parameter, wherein the comparison parameter is used for judging the dynamic property of at least one wireless channel characteristic value. In the embodiment of the present invention, one way to determine the dynamics of the wireless channel characteristic value according to the comparison parameter is: when the value of the second parameter is less than or equal to the value of the comparison parameter, the characteristic value of the wireless channel is relatively poor in dynamic property; when the value of the second parameter is larger than that of the comparison parameter, the wireless channel characteristic value has good dynamic property.
The manner of obtaining the comparison parameter according to the first parameter may be: according to the first parameter and the preset weight, obtaining a comparison parameter, namely the comparison parameter is the first parameter and the preset weight, wherein the preset weight is a numerical value obtained according to countless experiments, and the value of the preset weight is preferably 0.1 in the embodiment of the invention, because the countless experiments show that when the value of the preset weight is less than 0.1, the value of the comparison parameter is reduced, the possibility of giving up all the wireless channel characteristic values in the acquired wireless channel characteristic data is reduced, and the wireless channel characteristic values with poor dynamics are not favorably given up; when the value of the preset weight is greater than 0.1, the value of the comparison parameter is increased, and the possibility of discarding all the wireless channel characteristic values in the acquired wireless channel characteristic data is increased, so that all the wireless channel characteristic values in the acquired wireless channel characteristic data can be excessively discarded, and the generation rate of the symmetric key is reduced.
Taking the first parameter as an example of a mean (e.g., an arithmetic mean) of all the radio channel characteristic values in the acquired radio channel characteristic data, the comparison parameter of the radio device a is 0.1 × μ for the radio device a A (ii) a For radio B, the comparison variable for radio B is 0.1 × μ B I.e. for each radio device there is its own comparison parameter.
104: and comparing the second parameter with the comparison parameter to obtain a comparison result.
105: and processing at least one wireless channel characteristic value according to the comparison result.
When the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, the wireless channel characteristic value has poor dynamic property, and at the moment, a first request message is sent to a communication opposite side for requesting to abandon at least one wireless channel characteristic value; and after receiving a first confirmation message sent by the communication opposite side, giving up at least one wireless channel characteristic value.
For example, after comparing the second parameter with the comparison parameter, the radio device a obtains a comparison result indicating that the value of the second parameter is less than or equal to the value of the comparison parameter, which indicates that the radio device a needs to discard all the wireless channel characteristic values in the acquired wireless channel characteristic data, at this time, the radio device a sends a first request message to a communication party, such as the radio device B, to request to discard all the wireless channel characteristic values in the acquired wireless channel characteristic data. After receiving the first request message, the radio device B sends a first acknowledgement message to the radio device a, and after receiving the first acknowledgement message, the radio device a gives up all the wireless channel characteristic values in the acquired wireless channel characteristic data.
When the comparison result shows that the value of the second parameter is larger than the value of the comparison parameter, the wireless channel characteristic value has good dynamic property, and at the moment, a second request message is sent to a communication opposite side and is used for requesting to reserve at least one wireless channel characteristic value; if the first confirmation message sent by the communication opposite side is received, at least one wireless channel characteristic value is abandoned; if the second confirmation message sent by the communication opposite side is received, at least one wireless channel characteristic value is reserved.
For example, after comparing the second parameter with the comparison parameter, the radio device a obtains a comparison result indicating that the value of the second parameter is greater than the value of the comparison parameter, which indicates that the radio device a needs to reserve all the wireless channel characteristic values in the acquired wireless channel characteristic data, and at this time, the radio device a sends a second request message to a communication party, such as the radio device B, to request to reserve all the wireless channel characteristic values in the acquired wireless channel characteristic data. After receiving the second request message, if the second parameters of all the wireless channel characteristic values in the wireless channel characteristic data acquired by the wireless device B are less than or equal to the comparison parameters of the wireless device B, the wireless device B sends a first confirmation message to the wireless device a, and the wireless device a abandons all the wireless channel characteristic values in the acquired wireless channel characteristic data after receiving the first confirmation message. If the second parameters of all the radio channel characteristic values in the radio channel characteristic data acquired by the radio device B are greater than the comparison parameters of the radio device B, the radio device B sends a second confirmation message to the radio device a, and the radio device a retains all the radio channel characteristic values in the acquired radio channel characteristic data after receiving the second confirmation message.
That is, for both communication parties, such as the radio device a and the radio device B, as long as the value of the second parameter of either party is less than or equal to the value of the comparison parameter, both the radio device a and the radio device B should give up all the radio channel characteristic values in the radio channel characteristic data acquired this time, and the values of the second parameters of both parties are greater than the value of the comparison parameter, both the radio device a and the radio device B may retain all the radio channel characteristic values in the radio channel characteristic data acquired this time.
By the technical scheme, after a group of wireless channel characteristic data including at least one wireless channel characteristic value is obtained, a first parameter and a second parameter of the at least one wireless channel characteristic value are calculated, a comparison parameter is obtained according to the first parameter, the second parameter is compared with the comparison parameter to obtain a comparison result, the at least one wireless channel characteristic value is processed according to the comparison result, if the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, the obtained wireless channel characteristic value has poor dynamics, so the obtained wireless channel characteristic value can be abandoned, and if the comparison result shows that the value of the second parameter is greater than the value of the comparison parameter, the obtained wireless channel characteristic value has good dynamics, so the obtained wireless channel characteristic value can be reserved, therefore, the symmetric key can be generated by adopting the wireless channel characteristic value with good dynamic property, and the difficulty in generating the symmetric key is reduced.
Referring to fig. 2, a schematic structural diagram of a wireless channel characteristic data preprocessing apparatus according to an embodiment of the present invention is shown, which may include: an acquisition unit 11, a calculation unit 12, an acquisition unit 13, a comparison unit 14 and a processing unit 15.
An obtaining unit 11 is configured to obtain a set of wireless channel characteristic data, where the wireless channel characteristic data includes at least one wireless channel characteristic value. For example, according to the communication requirements of the two communication parties, one of the two communication parties obtains a set of channel characteristic data from the characteristic pool, the set of channel characteristic data includes 64 wireless channel characteristic values, for example, the two communication parties can be a radio device a at an airport tower and a radio device B at an airplane, the radio device a can obtain a set of wireless characteristic data including 64 wireless channel characteristic values from the characteristic pool, and each wireless channel characteristic value in the set of wireless characteristic data is marked as CH i A And indicates the i-th wireless channel characteristic value in the wireless channel characteristic data acquired by the radio apparatus a this time.
A calculating unit 12, configured to calculate a first parameter and a second parameter of the at least one radio channel characteristic value, where the first parameter is used to indicate a concentration trend of the at least one radio channel characteristic value, and the second parameter is used to indicate a dispersion degree of the at least one radio channel characteristic value.
For example, the first parameter is an average (e.g., an arithmetic average) of all the radio channel characteristic values in the acquired radio channel characteristic data, and the second parameter is a standard deviation of all the radio channel characteristic values in the acquired radio channel characteristic data.
In the embodiment of the present invention, the standard deviation is calculated as follows:
in which CH i The number N is the total number of the wireless channel characteristic values included in the acquired wireless channel characteristic data, and μ is the average value of all the wireless channel characteristic values in the acquired wireless channel characteristic data.
An obtaining unit 13, configured to obtain a comparison parameter according to the first parameter, where the comparison parameter is used to determine a dynamic property of at least one wireless channel characteristic value. In the embodiment of the present invention, one way to determine the dynamics of the wireless channel characteristic value according to the comparison parameter is: when the value of the second parameter is less than or equal to the value of the comparison parameter, the characteristic value of the wireless channel is relatively poor in dynamic property; when the value of the second parameter is larger than that of the comparison parameter, the wireless channel characteristic value has good dynamic property.
The way of obtaining the comparison parameter according to the first parameter may be: according to the first parameter and the preset weight, obtaining a comparison parameter, namely the comparison parameter is the first parameter and the preset weight, wherein the preset weight is a numerical value obtained according to countless experiments, and the value of the preset weight is preferably 0.1 in the embodiment of the invention, because the countless experiments show that when the value of the preset weight is less than 0.1, the value of the comparison parameter is reduced, the possibility of giving up all the wireless channel characteristic values in the acquired wireless channel characteristic data is reduced, and the wireless channel characteristic values with poor dynamics are not favorably given up; when the value of the preset weight is greater than 0.1, the value of the comparison parameter is increased, and the possibility of discarding all the wireless channel characteristic values in the acquired wireless channel characteristic data is increased, so that all the wireless channel characteristic values in the acquired wireless channel characteristic data can be excessively discarded, and the generation rate of the symmetric key is reduced.
Taking the first parameter as an example of a mean (e.g., an arithmetic mean) of all the radio channel characteristic values in the acquired radio channel characteristic data, the comparison parameter of the radio device a is 0.1 × μ for the radio device a A (ii) a For radio device B, the comparison variable for radio device B is 0.1 x μ B I.e. for each radio device there is its own comparison parameter.
And the comparison unit 14 is used for comparing the second parameter with the comparison parameter to obtain a comparison result.
And the processing unit 15 is configured to process at least one radio channel characteristic value according to the comparison result. In the embodiment of the present invention, the structure of the processing unit 15 is shown in fig. 3, and may include: a transmitting sub-unit 151, a first processing sub-unit 152, and a second processing sub-unit 153.
And a sending subunit 151, configured to send, to the communication peer, a first request message when the comparison result indicates that the value of the second parameter is less than or equal to the value of the comparison parameter, where the first request message is used to request to discard at least one wireless channel characteristic value. That is, when the comparison result indicates that the value of the second parameter is less than or equal to the value of the comparison parameter, which indicates that the wireless channel characteristic value has poor dynamics, the sending subunit 151 sends the first request packet to the communication partner, so as to request to discard at least one wireless channel characteristic value.
The first processing subunit 152 is configured to, after receiving the first acknowledgement packet sent by the communication partner, discard at least one wireless channel characteristic value.
The sending subunit 151 is further configured to send a second request packet to the communication peer when the comparison result indicates that the value of the second parameter is greater than the value of the comparison parameter, where the second request packet is used to request to reserve at least one wireless channel characteristic value. That is, when the comparison result indicates that the value of the second parameter is greater than the value of the comparison parameter, which indicates that the wireless channel characteristic value has good dynamic property, the sending subunit 151 sends a second request packet to the communication party, where the second request packet is used to request to reserve at least one wireless channel characteristic value
The second processing subunit 153 is configured to reserve at least one wireless channel characteristic value after receiving a second acknowledgement packet sent by the communication peer.
As can be seen from the above, as long as the value of the second parameter of any one of the two parties is less than or equal to the value of the comparison parameter, both the two parties give up all the radio channel characteristic values in the radio channel characteristic data acquired this time, and when the values of the second parameters of both parties are greater than the value of the comparison parameter, both the two parties can retain all the radio channel characteristic values in the radio channel characteristic data acquired this time.
By means of the technical scheme, after a group of wireless channel characteristic data comprising at least one wireless channel characteristic value is obtained, a first parameter and a second parameter of the at least one wireless channel characteristic value are calculated to obtain a comparison parameter according to the first parameter, the second parameter is compared with the comparison parameter to obtain a comparison result, the at least one wireless channel characteristic value is processed according to the comparison result, for example, when the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, the obtained wireless channel characteristic value has poor dynamics, the obtained wireless channel characteristic value can be abandoned, and when the comparison result shows that the value of the second parameter is greater than the value of the comparison parameter, the obtained wireless channel characteristic value has good dynamics, the obtained wireless channel characteristic value can be reserved, therefore, the symmetric key can be generated by adopting the wireless channel characteristic value with good dynamic property, and the difficulty in generating the symmetric key is reduced.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A method for preprocessing wireless channel characteristic data, the method comprising:
acquiring a group of wireless channel characteristic data, wherein the wireless channel characteristic data comprises at least one wireless channel characteristic value;
calculating a first parameter and a second parameter of the at least one wireless channel characteristic value, wherein the first parameter is used for indicating the concentration trend of the at least one wireless channel characteristic value, and the second parameter is used for indicating the dispersion degree of the at least one wireless channel characteristic value;
obtaining a comparison parameter according to the first parameter, wherein the comparison parameter is used for judging the dynamic property of the at least one wireless channel characteristic value;
comparing the second parameter with the comparison parameter to obtain a comparison result;
when the comparison result shows that the value of the second parameter is less than or equal to the value of the comparison parameter, sending a first request message to a communication opposite side, wherein the first request message is used for requesting to abandon the at least one wireless channel characteristic value;
after receiving the first confirmation message sent by the communication counterpart, giving up the at least one wireless channel characteristic value;
when the comparison result shows that the value of the second parameter is larger than the value of the comparison parameter, sending a second request message to the communication counterpart, wherein the second request message is used for requesting to reserve the at least one wireless channel characteristic value;
and after receiving the second confirmation message sent by the communication opposite side, reserving the at least one wireless channel characteristic value.
2. The method of claim 1, wherein the first parameter is a mean value of all radio channel characteristic values in the acquired radio channel characteristic data, and the second parameter is a standard deviation of all radio channel characteristic values in the acquired radio channel characteristic data.
3. The method of claim 2, wherein said deriving a comparison parameter from said first parameter comprises: and obtaining the comparison parameter according to the first parameter and a preset weight, wherein the value of the preset weight is 0.1.
4. A wireless channel characteristic data preprocessing apparatus, the apparatus comprising:
an obtaining unit, configured to obtain a set of wireless channel characteristic data, where the wireless channel characteristic data includes at least one wireless channel characteristic value;
a calculating unit, configured to calculate a first parameter and a second parameter of the at least one radio channel characteristic value, where the first parameter is used to indicate a concentration trend of the at least one radio channel characteristic value, and the second parameter is used to indicate a dispersion degree of the at least one radio channel characteristic value;
an obtaining unit, configured to obtain a comparison parameter according to the first parameter, where the comparison parameter is used to determine a dynamic property of the at least one wireless channel characteristic value;
the comparison unit is used for comparing the second parameter with the comparison parameter to obtain a comparison result;
the processing unit is used for processing the at least one wireless channel characteristic value according to the comparison result;
the processing unit comprises:
a sending subunit, configured to send a first request packet to a communication peer when the comparison result indicates that the value of the second parameter is smaller than or equal to the value of the comparison parameter, where the first request packet is used to request to discard the at least one radio channel characteristic value;
the first processing subunit is used for giving up the at least one wireless channel characteristic value after receiving a first confirmation message sent by a communication counterpart;
the sending subunit is further configured to send a second request message to the communication peer when the comparison result indicates that the value of the second parameter is greater than the value of the comparison parameter, where the second request message is used to request to reserve the at least one wireless channel characteristic value;
the processing unit further comprises: and the second processing subunit is used for reserving the at least one wireless channel characteristic value after receiving a second confirmation message sent by the communication counterpart.
5. The apparatus of claim 4, wherein the first parameter is a mean value of all radio channel characteristic values in the obtained radio channel characteristic data, and the second parameter is a standard deviation of all radio channel characteristic values in the obtained radio channel characteristic data.
6. The apparatus of claim 5, wherein the obtaining unit is configured to obtain the comparison parameter according to the first parameter and a preset weight, and a value of the preset weight is 0.1.
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