CN109068364B - Method, device and equipment for multi-base station roaming switching - Google Patents
Method, device and equipment for multi-base station roaming switching Download PDFInfo
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- CN109068364B CN109068364B CN201811190294.3A CN201811190294A CN109068364B CN 109068364 B CN109068364 B CN 109068364B CN 201811190294 A CN201811190294 A CN 201811190294A CN 109068364 B CN109068364 B CN 109068364B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
Abstract
The invention discloses a method, a device, equipment and a computer readable storage medium for multi-base station roaming switching, wherein the method comprises the following steps: determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station; determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station; and judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched. The terminal does not need to realize a complex reporting mechanism as in the prior art, but the base station switching can be realized by comparing the channel capacity of the base station with the transmission data rate of the terminal, the realization mode is simple, and the higher realization efficiency is further ensured.
Description
Technical Field
The present invention relates to the field of wireless communication systems, and in particular, to a method, an apparatus, a device, and a computer-readable storage medium for roaming handover of multiple base stations.
Background
In the existing wireless communication system, in order to expand the coverage requirement of the broadband mobile multimedia communication system, a plurality of base stations are required to be erected. At this time, the terminal of the mobile station needs to perform automatic roaming handover between the multiple base stations.
An LTE system and a WCDMA system both disclose terminal roaming switching strategies under a public network system, and take the LTE system as an example, the method is that a terminal reports measurement results (including RSRP and RSRQ) based on received signals; the reporting is divided into periodic reporting and event-triggered reporting, the periodic reporting is configured by a base station, and a terminal directly reports a measurement result; the event triggering report is divided into events between systems with the same frequency and events between different systems, and the events comprise that a service cell is better than an absolute threshold and is worse than the absolute threshold, a neighbor cell is better than the service cell, the neighbor cell is better than the absolute threshold, the service cell is worse than the absolute threshold, and the neighbor cell is better than the absolute threshold. And then realize the switch of the base station on the basis of the result reported, this method of switching needs the terminal to realize the more complicated reporting mechanism, and then lead to the complicated switching mode, switch the inefficiency.
In summary, the technical solutions for implementing multi-base-station roaming handover in the prior art have the problems of complex handover mode and low handover efficiency.
Disclosure of Invention
The invention aims to provide a method, a device, equipment and a computer readable storage medium for multi-base station roaming handover, which can solve the problems of complex handover mode and low handover efficiency in the technical scheme for realizing multi-base station roaming handover in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for multi-base station roaming handover, comprising:
determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station;
determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station;
and judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched.
Preferably, before determining whether the current channel capacity of the base station to which the terminal is currently registered is greater than the transmission data rate corresponding to the base station, the method further includes:
and according to the following formula, carrying out weighted calculation on the current channel capacity of each base station to obtain the corresponding weighted channel capacity:
Ca(t,i)＝a C(t,i)+(1-a)C(t-1,i)，0<a<1；
wherein a is a preset parameter, i represents a base station number, t represents the current time, Ca (t, i) represents the weighted channel capacity of the current time of the base station i, C (t, i) represents the channel capacity of the current time of the base station i, and C (t-1, i) represents the channel capacity of the last moment of the base station i;
and determining the weighted channel capacity of each base station as the current channel capacity of each base station.
Preferably, determining one of the base stations having a current channel capacity greater than a corresponding data transmission rate as the base station to which the terminal needs to be handed over includes:
calculating the channel margin of each base station according to the following formula:
Q(t,i)＝Ca(t,i)-R(i)；
q (t, i) represents the channel margin of the current time of the base station i, and R (i) represents the transmission data rate of the terminal to be realized under the base station i;
and determining the base station with the maximum value of Q (t, i) as the base station to which the terminal needs to be switched.
Preferably, determining the channel capacity of each base station based on the signal-to-noise ratio of each base station includes:
determining the physical layer transmission mode of each base station, determining a curve which represents the corresponding relation between the signal-to-noise ratio and the channel capacity and corresponds to each base station in the respective physical layer transmission mode, and determining the channel capacity corresponding to the signal-to-noise ratio of each base station according to the determined curve.
An apparatus for multi-base station roaming handover, comprising:
an acquisition module to: determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station;
a determination module to: determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station;
a determination module configured to: and judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched.
Preferably, the method further comprises the following steps:
a calculation module to: before the judging module judges whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, the current channel capacity of each base station is weighted and calculated according to the following formula to obtain the corresponding weighted channel capacity:
Ca(t,i)＝a C(t,i)+(1-a)C(t-1,i)，0<a<1；
wherein a is a preset parameter, i represents a base station number, t represents the current time, Ca (t, i) represents the weighted channel capacity of the current time of the base station i, C (t, i) represents the channel capacity of the current time of the base station i, and C (t-1, i) represents the channel capacity of the last moment of the base station i; and the weighted channel capacity is used for determining the weighted channel capacity of each base station as the current channel capacity of each base station.
Preferably, the judging module includes:
a selecting unit for: calculating the channel margin of each base station according to the following formula:
Q(t,i)＝Ca(t,i)-R(i)；
q (t, i) represents the channel margin of the current time of the base station i, and R (i) represents the transmission data rate of the terminal to be realized under the base station i; and determining the base station with the maximum value of Q (t, i) as the base station to which the terminal needs to be switched.
Preferably, the determining module includes:
a determination unit configured to: determining the physical layer transmission mode of each base station, determining a curve which represents the corresponding relation between the signal-to-noise ratio and the channel capacity and corresponds to each base station in the respective physical layer transmission mode, and determining the channel capacity corresponding to the signal-to-noise ratio of each base station according to the determined curve.
An apparatus for multi-base station roaming handover, comprising:
a memory for storing a computer program;
a processor configured to implement the steps of the method for multi-base station roaming handover as described in any one of the above when executing the computer program.
A computer readable storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of the method of multi-base station roaming handover as claimed in any one of claims 1 to 4.
The invention provides a method, a device, equipment and a computer readable storage medium for multi-base station roaming switching, wherein the method comprises the following steps: determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station; determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station; and judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched. In the technical scheme disclosed by the application, after the channel capacity of each base station in a wireless system and the transmission data rate of a terminal under each base station are determined, whether the switching of the base stations needs to be realized is determined by judging whether the channel capacity of the base station currently registered by the terminal meets the transmission data rate of the terminal under the currently registered base station, namely whether the base station currently registered by the terminal meets the data transmission requirement of the terminal, so that the base stations do not need to be switched when the base station currently registered by the terminal can meet the data transmission requirement of the terminal, and the terminal is switched to other base stations capable of meeting the data transmission requirement of the terminal when the base station currently registered by the terminal cannot meet the data transmission requirement of the terminal, the complex reporting mechanism of the terminal is not needed as in the prior art, and the base station switching can be realized by comparing the channel capacity of the base stations with the transmission data rate of the terminal, the realization mode is simple, and then higher realization efficiency has been guaranteed.
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 described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for multi-base station roaming handover according to an embodiment of the present invention;
fig. 2 is a graph showing a correspondence between a signal-to-noise ratio and a channel capacity when 16QAM is used for modulation in the method for multi-base-station roaming handover according to the embodiment of the present invention;
fig. 3 is a graph showing a correspondence between a signal-to-noise ratio and a channel capacity in QPSK modulation in the method for multi-base-station roaming handover according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for multi-base station roaming handover according to an embodiment of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flowchart of a method for multi-base station roaming handover according to an embodiment of the present invention is shown, where the method includes:
s11: the base stations in the wireless system, the signal-to-noise ratio of each base station and the transmission data rate of the terminal to be realized under each base station are determined.
It should be noted that the subject of the method for performing roaming handover between multiple base stations according to the embodiment of the present invention may be a corresponding apparatus for performing roaming handover between multiple base stations, and the apparatus may be implemented on a digital integrated circuit chip. A wireless system is a wireless communication system in the background art, and specifically, a wireless system in the present application may refer to any system that includes a plurality of base stations and needs to perform handover among the plurality of base stations. The signal-to-noise ratio refers to the ratio of a signal to noise in an electronic device or electronic system, and in the present application, the signal-to-noise ratio refers to the ratio of a signal to noise in a base station; the transmission data rate of the terminal under each base station is the data rate which the terminal needs to achieve when realizing data transmission under each base station, and the unit is bit/s/Hz; specifically, each base station may be denoted as N _ BSi, and a transmission data rate that the terminal needs to achieve under each base station may be denoted as Ri, i is 0,1,2.. N, where i is a number of the base station, and N is a total number of the base stations; where, i-0 may represent the base station currently registered by the terminal, and the rest are neighboring base stations.
In addition, by receiving the downlink broadcast channels of all the base stations, the SNR _ BS (t, i) of each base station can be calculated, and the implementation principle of the technical scheme for calculating the SNR of the corresponding base station by receiving the downlink broadcast channels is consistent with that of the corresponding technical scheme in the prior art, and is not described herein again.
S12: and determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station.
The channel capacity is expressed as the number of bits of binary bits that a channel of a base station can transmit per unit time (referred to as the data transmission rate and bit rate of the channel), and is expressed in bits/second (b/s), which is denoted as bps. The signal-to-noise ratio of any base station has a corresponding relation with the channel capacity, so that the channel capacity of any base station can be determined based on the signal-to-noise ratio of any base station. In addition, the current channel capacity is a variable, and the determined channel capacity is assigned to the variable of the current channel capacity in step S12.
S13: judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched.
For any base station, if the current channel capacity of the base station is greater than the data transmission rate of the terminal to be realized under the base station, it indicates that the base station can meet the data transmission requirement of the terminal, otherwise, it indicates that the base station cannot meet the data transmission requirement of the terminal. Therefore, in the present application, whether the base station to which the terminal is to be switched is determined by determining whether the current channel capacity of the base station interrupting the current registration is greater than the transmission data rate that the terminal needs to implement at the base station currently registered, if the determination result is yes, it indicates that the base station currently registered by the terminal can meet the data transmission requirement of the terminal, and the base station to which the terminal is not to be switched is not required, otherwise, it indicates that the base station currently registered by the terminal cannot meet the data transmission requirement of the terminal, at this time, one base station is selected from other base stations that can meet the data transmission requirement of the terminal as the base station to which the terminal needs to implement registration, that is, the terminal is changed from the base station currently registered to the base station determined to be switched to.
In the technical scheme disclosed by the application, after the channel capacity of each base station in a wireless system and the transmission data rate of a terminal under each base station are determined, whether the switching of the base stations needs to be realized is determined by judging whether the channel capacity of the base station currently registered by the terminal meets the transmission data rate of the terminal under the currently registered base station, namely whether the base station currently registered by the terminal meets the data transmission requirement of the terminal, so that the base stations do not need to be switched when the base station currently registered by the terminal can meet the data transmission requirement of the terminal, and the terminal is switched to other base stations capable of meeting the data transmission requirement of the terminal when the base station currently registered by the terminal cannot meet the data transmission requirement of the terminal, the complex reporting mechanism of the terminal is not needed as in the prior art, and the base station switching can be realized by comparing the channel capacity of the base stations with the transmission data rate of the terminal, the realization mode is simple, and then higher realization efficiency has been guaranteed.
Before determining whether the current channel capacity of the base station currently registered by the terminal is greater than the transmission data rate corresponding to the base station, the method for roaming handover of multiple base stations according to the embodiment of the present invention may further include:
and according to the following formula, carrying out weighted calculation on the current channel capacity of each base station to obtain the corresponding weighted channel capacity:
Ca(t,i)＝aC(t,i)+(1-a)C(t-1,i)，0<a<1；
wherein a is a preset parameter, i represents a base station number, t represents the current time, Ca (t, i) represents the weighted channel capacity of the current time of the base station i, C (t, i) represents the channel capacity of the current time of the base station i, and C (t-1, i) represents the channel capacity of the last moment of the base station i;
and determining the weighted channel capacity of each base station as the current channel capacity of each base station.
It should be noted that, for any base station, an abnormal situation may occur in which the channel capacity changes greatly in an instant, this abnormal situation does not reflect the situation corresponding to the true channel capacity of the base station in the normal situation, accordingly, it is unreasonable to determine whether the channel capacity of the corresponding base station satisfies the data transmission requirement of the terminal based on such abnormal situation, therefore, in the present application, the weighting calculation is implemented by the above formula through the channel capacity at the previous time and the channel capacity at the current time, therefore, even in the case of an abnormality in which the channel capacity changes greatly in a moment, the abnormality can be corrected by the channel capacity at the previous moment, and further, it is ensured that the channel capacity for implementing the determination of step S13 can reflect the real situation of the corresponding base station under normal conditions, so as to effectively determine whether the corresponding base station can meet the data transmission requirement of the terminal. In addition, the specific value of the above-mentioned a may be set by an operator according to actual needs, and since it is determined in step S12 that the value of the current channel capacity is the channel capacity determined in step S12, in this embodiment, the current channel capacity of each base station is weighted to obtain the corresponding weighted channel capacity, and in fact, the channel capacity of the base station is weighted to obtain the corresponding weighted channel capacity.
The method for roaming switching of multiple base stations, provided by the embodiment of the present invention, for determining one base station of base stations whose weighted channel capacity is greater than a corresponding data transmission rate as a base station to which a terminal needs to be switched, may include:
calculating the channel margin of each base station according to the following formula:
Q(t,i)＝Ca(t,i)-R(i)；
q (t, i) represents the channel margin of the current time of the base station i, and R (i) represents the transmission data rate of the terminal to be realized under the base station i;
and determining the base station with the maximum value of Q (t, i) as the base station to which the terminal needs to be switched.
It should be noted that, when a base station to which a terminal needs to be switched is selected, any base station that meets a data transmission requirement of the terminal may be selected, and the data transmission requirement may also be achieved by calculating a channel margin of the base station, specifically, the channel margin of the base station is defined as a difference between a current channel capacity of the base station and a data transmission rate of the terminal under the base station, and the larger the difference is, the more abundant the channel capacity provided by the corresponding base station when the terminal is implemented to transmit data is indicated, so that the base station with the largest channel margin is selected as the base station to which the terminal needs to be switched in the present application, and it is further ensured that the terminal can implement data transmission at the largest data transmission rate after implementing the switching of the.
The method for roaming switching of multiple base stations provided by the embodiment of the invention determines the channel capacity of each base station based on the signal-to-noise ratio of each base station, and can comprise the following steps:
determining the physical layer transmission mode of each base station, determining a curve which represents the corresponding relation between the signal-to-noise ratio and the channel capacity and corresponds to each base station in the respective physical layer transmission mode, and determining the channel capacity corresponding to the signal-to-noise ratio of each base station according to the determined curve.
It should be noted that, a corresponding curve representing a correspondence between the signal-to-noise ratio and the channel capacity may be set by a worker in advance for the physical layer transmission mode of different base stations, an abscissa of the curve may represent the signal-to-noise ratio, and an ordinate represents the channel capacity of the base station, so that after the curve is obtained, for any base station, after a point corresponding to the signal-to-noise ratio of the any base station is determined on the curve corresponding to the physical layer transmission mode of the any base station, a value of an ordinate of the point is the channel capacity of the any base station, and thus, the curve can conveniently and quickly obtain the channel capacity of each base station, and is suitable for a common-frequency/different-frequency networking, and has universality. Specifically, the meaning of the physical layer transmission mode is the same as that of the corresponding concept in the prior art, and may include 16QAM modulation, QPSK modulation, and the like, as shown in fig. 2, which is a graph showing the correspondence between the signal-to-noise ratio and the channel capacity when the physical layer transmission mode of the base station is 16QAM modulation, and as shown in fig. 3, which is a graph showing the correspondence between the signal-to-noise ratio and the channel capacity when the physical layer transmission mode of the base station is QPSK modulation.
It should be noted that, a fast calculation query table representing a corresponding relationship between the signal-to-noise ratio and the channel capacity may be obtained in advance by an operator for the physical layer transmission modes of different base stations, as shown in table 1, the fast calculation query table represents a corresponding relationship between the signal-to-noise ratio and the channel capacity when the physical layer transmission mode of the base station is 16QAM modulation, and as shown in table 2, the fast calculation query table represents a corresponding relationship between the signal-to-noise ratio and the channel capacity when the physical layer transmission mode of the base station is QPSK modulation. Thereby further simplifying the computational operations.
TABLE 1
TABLE 2
In this embodiment, the technical solution disclosed in the present invention is specifically described by taking an example that both the base station and the terminal use the OFDM technology for communication. The number of base stations is set to be 4, and in the 4 base stations, two base stations adopt a 16QAM modulation mode and two base stations adopt a QPSK modulation mode. According to the different numbers of the vacant sub-carriers under different base stations, the data transmission rates required to be realized by the terminals under 4 base stations are respectively set to be R1-1 bit/s/Hz, R2-1.5 bit/s/Hz, R3-0.8 bit/s/Hz and R4-2 bit/s/Hz.
(1) By receiving downlink broadcast channels of all base stations, calculating the signal-to-noise ratio SNR _ BS (t, i) of each base station, wherein i represents different base stations, and i is 0,1,2,3, and i is 0, which represents the base station currently registered by the terminal.
(2) The channel capacity of each base station is determined based on the signal-to-noise ratio of each base station.
And aiming at the physical layer transmission modes of different base stations, the channel capacity C (t, i) of each base station is inquired and calculated through a set corresponding relation curve between the signal-to-noise ratio and the channel capacity or through a quick calculation inquiry table (tables 1 and 2).
(3) The weighted channel capacity of each base station is calculated according to the following formula:
Ca(t,i)＝aC(t,i)+(1-a)C(t-1,i)；
wherein a is 0.95.
(4) According to the weighted channel capacity of each base station, the judgment of base station switching is realized according to the following steps:
(4.1) if Ca (t,0) > R (0), determining that the base station does not need to be handed over;
(4.2) if Ca (t,0) ≦ R (0), calculating Q (t, i) ═ Ca (t, i) -R (i);
and (4.3) selecting the base station i corresponding to the maximum Q (t, i) as the base station to be switched.
The invention calculates the channel capacity corresponding to the signal-to-noise ratio of each base station aiming at the transmission modes of the physical layers of different base stations, and uses the redundancy of the weighted channel capacity of each base station and the expected transmission rate (data transmission rate) of the terminal under each base station as the switching decision quantity of the base station. Therefore, the influence factors such as the signal-to-noise ratio, the distance difference, the base station vacant data rate and the like which are needed to be used for realizing the base station switching in the prior art are skillfully integrated into a single variable, and the multi-base station switching algorithm is simplified. Through practical tests, the technical scheme provided by the invention simplifies a multi-base station switching algorithm, and can ensure the data throughput rate of the terminal as much as possible under the condition of ensuring that the base station switching is less enough.
An embodiment of the present invention further provides a device for multi-base station roaming handover, as shown in fig. 4, the device may include:
an obtaining module 11, configured to: determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station;
a determining module 12 for: determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station;
a judging module 13, configured to: judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched.
The apparatus for multi-base station roaming handover provided by the embodiment of the present invention may further include:
a calculation module to: before the judging module judges whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, the current channel capacity of each base station is weighted and calculated according to the following formula to obtain the corresponding weighted channel capacity:
Ca(t,i)＝aC(t,i)+(1-a)C(t-1,i)，0<a<1；
wherein a is a preset parameter, i represents a base station number, t represents the current time, Ca (t, i) represents the weighted channel capacity of the current time of the base station i, C (t, i) represents the channel capacity of the current time of the base station i, and C (t-1, i) represents the channel capacity of the last moment of the base station i; and the weighted channel capacity is used for determining the weighted channel capacity of each base station as the current channel capacity of each base station.
In an embodiment of the present invention, a determining module of a device for multi-base station roaming handover may include:
a selecting unit for: calculating the channel margin of each base station according to the following formula:
Q(t,i)＝Ca(t,i)-R(i)；
q (t, i) represents the channel margin of the current time of the base station i, and R (i) represents the transmission data rate of the terminal to be realized under the base station i; and determining the base station with the maximum value of Q (t, i) as the base station to which the terminal needs to be switched.
In an apparatus for multi-base station roaming handover provided in an embodiment of the present invention, a determining module may include:
a determination unit configured to: determining the physical layer transmission mode of each base station, determining a curve which represents the corresponding relation between the signal-to-noise ratio and the channel capacity and corresponds to each base station in the respective physical layer transmission mode, and determining the channel capacity corresponding to the signal-to-noise ratio of each base station according to the determined curve.
The embodiment of the invention also provides a device for multi-base station roaming switching, which can comprise:
a memory for storing a computer program;
a processor configured to implement the steps of the method for multi-base station roaming handover as described above when executing the computer program.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for multi-base-station roaming handover may be implemented as described above.
It should be noted that for the description of the related parts in the apparatus, the device, and the computer-readable storage medium for multi-base station roaming handover provided in the embodiments of the present invention, reference is made to the detailed description of the corresponding parts in the method for multi-base station roaming handover provided in the embodiments of the present invention, and details are not repeated herein. In addition, parts of the technical solutions provided in the embodiments of the present invention that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail, so as to avoid redundant description.
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.
Claims (6)
1. A method for multi-base station roaming handover, comprising:
determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station;
determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station;
judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station or not, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched;
before judging whether the current channel capacity of the base station currently registered by the terminal is greater than the transmission data rate corresponding to the base station, the method further comprises the following steps:
and according to the following formula, carrying out weighted calculation on the current channel capacity of each base station to obtain the corresponding weighted channel capacity:
Ca(t,i)＝a C(t,i)+(1-a)C(t-1,i)，0<a<1；
wherein a is a preset parameter, i represents a base station number, t represents the current time, Ca (t, i) represents the weighted channel capacity of the current time of the base station i, C (t, i) represents the channel capacity of the current time of the base station i, and C (t-1, i) represents the channel capacity of the last moment of the base station i;
determining the weighted channel capacity of each base station as the current channel capacity of each base station;
determining channel capacity of each base station based on the signal-to-noise ratio of each base station, comprising:
determining the physical layer transmission mode of each base station, determining a curve which represents the corresponding relation between the signal-to-noise ratio and the channel capacity and corresponds to each base station in the respective physical layer transmission mode, and determining the channel capacity corresponding to the signal-to-noise ratio of each base station according to the determined curve.
2. The method of claim 1, wherein determining a base station of the base stations having a current channel capacity greater than a corresponding data transmission rate as the base station to which the terminal should be handed over comprises:
calculating the channel margin of each base station according to the following formula:
Q(t,i)＝Ca(t,i)-R(i)；
q (t, i) represents the channel margin of the current time of the base station i, and R (i) represents the transmission data rate of the terminal to be realized under the base station i;
and determining the base station with the maximum value of Q (t, i) as the base station to which the terminal needs to be switched.
3. An apparatus for multi-base station roaming handover, comprising:
an acquisition module to: determining each base station in a wireless system, the signal-to-noise ratio of each base station and the transmission data rate of a terminal to be realized under each base station;
a determination module to: determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determining the channel capacity of each base station as the current channel capacity of each base station;
a determination module configured to: judging whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station or not, if so, determining that the base station does not need to be switched, and if not, determining that one base station in the base stations with the current channel capacity larger than the corresponding data transmission rate is the base station to which the terminal needs to be switched;
the device further comprises:
a calculation module to: before the judging module judges whether the current channel capacity of the base station currently registered by the terminal is larger than the transmission data rate corresponding to the base station, the current channel capacity of each base station is weighted and calculated according to the following formula to obtain the corresponding weighted channel capacity:
Ca(t,i)＝a C(t,i)+(1-a)C(t-1,i)，0<a<1；
wherein a is a preset parameter, i represents a base station number, t represents the current time, Ca (t, i) represents the weighted channel capacity of the current time of the base station i, C (t, i) represents the channel capacity of the current time of the base station i, and C (t-1, i) represents the channel capacity of the last moment of the base station i; and the weighted channel capacity used for confirming each base station is the present channel capacity of each base station;
the determining module comprises:
a determination unit configured to: determining the physical layer transmission mode of each base station, determining a curve which represents the corresponding relation between the signal-to-noise ratio and the channel capacity and corresponds to each base station in the respective physical layer transmission mode, and determining the channel capacity corresponding to the signal-to-noise ratio of each base station according to the determined curve.
4. The apparatus of claim 3, wherein the determining module comprises:
a selecting unit for: calculating the channel margin of each base station according to the following formula:
Q(t,i)＝Ca(t,i)-R(i)；
q (t, i) represents the channel margin of the current time of the base station i, and R (i) represents the transmission data rate of the terminal to be realized under the base station i; and determining the base station with the maximum value of Q (t, i) as the base station to which the terminal needs to be switched.
5. An apparatus for multi-base station roaming handover, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of multi-base station roaming handover as claimed in any one of claims 1 to 2 when executing the computer program.
6. A computer-readable storage medium, having a computer program stored thereon, which, when executed by a processor, performs the steps of the method for multi-base station roaming handover as claimed in any one of claims 1 to 2.
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