CN109068364B - A method, device and equipment for roaming handover of multiple base stations - Google Patents

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

A method, device and equipment for roaming handover of multiple base stations

technical field

The present invention relates to the technical field of wireless communication systems, and more particularly, to a method, apparatus, device and computer-readable storage medium for roaming handover of multiple base stations.

Background technique

In the existing wireless communication system, in order to expand the coverage requirement of the broadband mobile multimedia communication system, it is often necessary to set up multiple base stations. At this time, the terminal of the mobile station needs to automatically roam and switch between multiple base stations.

Both the LTE system and the WCDMA system disclose the terminal roaming handover strategy under the public network system. Taking the LTE system as an example, the method is that the terminal reports the measurement results (including RSRP and RSRQ) based on the received signal; and the reporting is divided into periodic Reporting and event-triggered reporting, periodic reporting is configured by the base station, and the terminal directly reports the measurement results; event-triggered reporting is further divided into events between systems on the same frequency and events between different systems, including serving cells that are better than the absolute threshold and worse than absolute Threshold, neighbor cell is better than serving cell, neighbor cell is better than absolute threshold, serving cell is worse than an absolute threshold and neighbor cell is better than an absolute threshold and other events need to be reported. Further, the handover of the base station is realized based on the reported result. This handover method requires the terminal to implement a relatively complex reporting mechanism, which in turn leads to a complicated handover method and low handover efficiency.

To sum up, the technical solutions for realizing multi-base station roaming handover in the prior art have the problems of complicated handover methods and low handover efficiency.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method, device, equipment and computer-readable storage medium for multi-base station roaming handover, which can solve the problems of complicated handover methods and low handover efficiency in the technical solutions for realizing multi-base station roaming handover in the prior art. question.

In order to achieve the above object, the present invention provides the following technical solutions:

A method for multi-base station roaming handover, comprising:

Determine each base station in the wireless system, the signal-to-noise ratio of each base station, and the transmission data rate that the terminal needs to achieve under each base station;

Determine the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determine the channel capacity of each base station as the current channel capacity of each base station;

Determine 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. If so, it is determined that there is no need to switch the base station. If not, it is determined that the current channel capacity is greater than one of the base stations with the corresponding data transmission rate. is the base station to which the terminal needs to be handed over.

Preferably, 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 includes:

According to the following formula, the current channel capacity of each base station is weighted and calculated to obtain the corresponding weighted channel capacity:

Ca(t,i)=a C(t,i)+(1-a)C(t-1,i), 0<a<1;

Among them, a is a preset parameter, i is the base station number, t is the current time, Ca(t,i) is the weighted channel capacity of the base station i at the current time, C(t,i) is the channel capacity of the base station i at the current time, C (t-1,i) represents the channel capacity of base station i at the last moment;

Determine the weighted channel capacity of each base station as the current channel capacity of each base station.

Preferably, determining a base station among the base stations whose current channel capacity is greater than the corresponding data transmission rate is the base station to which the terminal needs to be handed over, including:

Calculate the channel margin of each base station according to the following formula:

Q(t,i)=Ca(t,i)-R(i);

Among them, Q(t,i) represents the channel margin at the current time of base station i, and R(i) represents the transmission data rate that the terminal needs to achieve under base station i;

It is determined that the base station with the largest value of Q(t,i) is the base station to which the terminal needs to be handed over.

Preferably, the channel capacity of each base station is determined based on the signal-to-noise ratio of each base station, including:

Determine the physical layer transmission mode of each base station, and determine the corresponding curve of the signal-to-noise ratio and the channel capacity corresponding to each base station in the respective physical layer transmission mode, and determine the corresponding signal-to-noise ratio of each base station from the determined curve. channel capacity.

A device for roaming handover of multiple base stations, comprising:

an acquisition module, used for: determining each base station located in the wireless system, the signal-to-noise ratio of each base station, and the transmission data rate that the terminal needs to realize under each base station;

a determining module, configured to: determine the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determine that the channel capacity of each base station is the current channel capacity of each base station;

A judging module, used for: 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, if so, determining that the base station does not need to be switched, if not, determining that the current channel capacity is greater than the corresponding data transmission rate One of the base stations is the base station to which the terminal needs to be handed over.

Preferably, it also includes:

The calculation module is used for: before the judgment module judges 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, according to the following formula, the current channel capacity of each base station is weighted and calculated to obtain the corresponding The weighted channel capacity of:

Ca(t,i)=a C(t,i)+(1-a)C(t-1,i), 0<a<1;

Among them, a is a preset parameter, i is the base station number, t is the current time, Ca(t,i) is the weighted channel capacity of the base station i at the current time, C(t,i) is the channel capacity of the base station i at the current time, C (t-1,i) represents the channel capacity of the base station i at the last moment; and is used to determine the weighted channel capacity of each base station as the current channel capacity of each base station.

Preferably, the judging module includes:

The selection unit is used to calculate the channel margin of each base station according to the following formula:

Q(t,i)=Ca(t,i)-R(i);

Among them, Q(t,i) represents the channel margin of base station i at the current time, R(i) represents the transmission data rate that the terminal needs to achieve under base station i; the base station with the largest value of Q(t,i) is the The base station to which the terminal needs to be handed over.

Preferably, the determining module includes:

The determining unit is configured to: determine the physical layer transmission mode of each base station, and determine the corresponding curve representing the corresponding relationship between the signal-to-noise ratio and the channel capacity of each base station under the respective physical layer transmission mode, and determine each base station from the determined curve. The channel capacity corresponding to the signal-to-noise ratio of the base station.

A device for multi-base station roaming handover, comprising:

memory for storing computer programs;

The processor is configured to implement the steps of the method for multi-base station roaming handover according to any one of the above when executing the computer program.

A computer-readable storage medium, storing a computer program on the computer-readable storage medium, when the computer program is executed by a processor, the steps of the method for roaming handover of multiple base stations according to any one of claims 1 to 4 are implemented .

The present invention provides a method, apparatus, device and computer-readable storage medium for roaming handover of multiple base stations, wherein the method includes: determining each base station in a wireless system, the signal-to-noise ratio of each base station, and the requirement of a terminal under each base station. The realized transmission data rate; determine the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determine that the channel capacity of each base station is the current channel capacity of each base station; determine whether the current channel capacity of the base station currently registered by the terminal is greater than this The transmission data rate corresponding to the base station. If yes, it is determined that the base station does not need to be switched. If not, it is determined that one of the base stations whose current channel capacity is greater than the corresponding data transmission rate is the base station to which the terminal needs to be switched. In the technical solution disclosed in the present application, after determining the channel capacity of each base station in the wireless system and the transmission data rate that the terminal needs to achieve under each base station, it is determined whether the channel capacity of the base station currently registered by the terminal meets the requirements of the base station currently registered by the terminal. The transmission data rate that needs to be realized, that is, whether the base station currently registered by the terminal meets the data transmission requirements of the terminal, is used to determine whether the handover of the base station needs to be realized. When the base station currently registered by the terminal cannot meet its data transmission needs, the terminal is switched to other base stations that can meet the data transmission needs of the terminal. There is no need for the terminal to implement a complex reporting mechanism as in the prior art. The base station handover can be realized only by realizing the comparison between the transmission data rates, and the realization method is simple, thereby ensuring high realization efficiency.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

FIG. 1 is a flowchart of a method for roaming handover of multiple base stations according to an embodiment of the present invention;

2 is a graph showing the corresponding relationship between signal-to-noise ratio and channel capacity during 16QAM modulation in a method for multi-base station roaming handover provided by an embodiment of the present invention;

3 is a graph showing the corresponding relationship between signal-to-noise ratio and channel capacity during QPSK modulation in a method for multi-base station roaming handover provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for roaming handover of multiple base stations according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1, which shows a flowchart of a method for roaming and handover of multiple base stations provided by an embodiment of the present invention, which may include:

S11: Determine each base station in the wireless system, the signal-to-noise ratio of each base station, and the transmission data rate that the terminal needs to achieve under each base station.

It should be noted that the execution subject of the method for multi-base station roaming handover provided by the embodiment of the present invention may be a corresponding multi-base station roaming handover device, and the device may be implemented based on a digital integrated circuit chip. The wireless system is the wireless communication system in the background art. Specifically, the wireless system in this application may refer to any system that includes multiple base stations and needs to implement handover among the multiple base stations. The signal-to-noise ratio refers to the ratio of signal to noise in an electronic device or electronic system. In this application, the signal-to-noise ratio refers to the ratio of signal to noise in the base station; the transmission data rate that the terminal needs to achieve under each base station is the The data rate that needs to be achieved when data transmission is realized at the lower end, and its unit is bit/s/Hz; specifically, each base station can be expressed as N_BSi, and the transmission data rate that the terminal needs to realize under each base station can be expressed as Ri, i= 0,1,2....n, i is the number of the base station, and n is the total number of base stations; wherein, i=0 can represent the base station currently registered by the terminal, and the rest are adjacent base stations.

In addition, by receiving the downlink broadcast channels of all base stations, the signal-to-noise ratio SNR_BS(t,i) of each base station can be calculated. The implementation principles of the corresponding technical solutions are the same, and are not repeated here.

S12: Determine the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determine that the channel capacity of each base station is the current channel capacity of each base station.

It should be noted that the channel capacity is expressed as the number of binary bits that can be transmitted by the channel of the base station in a unit time (called the data transmission rate of the channel, bit rate), expressed in the form of bits per second (b/s). Recorded as bps. There is a corresponding relationship between the signal-to-noise ratio of any base station and the channel capacity, so 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: Determine 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, if so, it is determined that there is no need to switch the base station, and if not, it is determined that the current channel capacity is greater than one of the base stations with the corresponding data transmission rate It is the base station to which the terminal needs to be handed over.

For any base station, if the current channel capacity of any base station is greater than the transmission data rate that the terminal needs to achieve under the base station, it means that any base station can meet the data transmission requirements of the terminal; otherwise, it means that the base station can meet the data transmission requirements of the terminal Any base station cannot meet the data transmission requirements of the terminal. Therefore, in this application, it is determined whether the base station registered by the terminal needs to be switched by judging whether the current channel capacity of the base station that interrupts the current registration is greater than the transmission data rate that the terminal needs to achieve under the currently registered base station. If the above judgment result is yes, then It means that the base station currently registered by the terminal can meet the data transmission requirements of the terminal, and there is no need to switch the base station registered by the terminal. Otherwise, it means that the base station currently registered by the terminal can no longer meet the data transmission requirements of the terminal. One base station is selected from among the base stations that the terminal needs to register, that is, the terminal is changed from the currently registered base station to the base station to which it is determined to be handed over.

In the technical solution disclosed in the present application, after determining the channel capacity of each base station in the wireless system and the transmission data rate that the terminal needs to achieve under each base station, it is determined whether the channel capacity of the base station currently registered by the terminal meets the requirements of the base station currently registered by the terminal. The transmission data rate that needs to be realized, that is, whether the base station currently registered by the terminal meets the data transmission requirements of the terminal, is used to determine whether the handover of the base station needs to be realized. When the base station currently registered by the terminal cannot meet its data transmission needs, the terminal is switched to other base stations that can meet the data transmission needs of the terminal. There is no need for the terminal to implement a complex reporting mechanism as in the prior art. The base station handover can be realized only by realizing the comparison between the transmission data rates, and the realization method is simple, thereby ensuring high realization efficiency.

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 for multi-base station roaming handover provided by the embodiment of the present invention may further include:

According to the following formula, the current channel capacity of each base station is weighted and calculated to obtain the corresponding weighted channel capacity:

Ca(t,i)=aC(t,i)+(1-a)C(t-1,i), 0<a<1;

Among them, a is a preset parameter, i is the base station number, t is the current time, Ca(t,i) is the weighted channel capacity of the base station i at the current time, C(t,i) is the channel capacity of the base station i at the current time, C (t-1,i) represents the channel capacity of base station i at the last moment;

Determine 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, there may be an abnormal situation in which the channel capacity changes greatly in an instant. This abnormal situation does not reflect the actual channel capacity of the corresponding base station under normal conditions. Correspondingly, based on In this abnormal situation, it is unreasonable to determine whether the channel capacity of the corresponding base station meets the data transmission requirements of the terminal. Therefore, in this application, the channel capacity at the previous moment and the channel capacity at the current moment are weighted by the above formula, so that even in the In the abnormal situation that the channel capacity changes greatly in an instant, the abnormality can be corrected by using the channel capacity at the previous moment, so as to ensure that the channel capacity used to realize the judgment in step S13 can reflect the real situation of the corresponding base station under normal conditions, so as to ensure that Effectively determine whether the corresponding base station can meet the data transmission requirements of the terminal. In addition, the specific value of the above a can be set by the staff according to actual needs. Since the value of the current channel capacity has been determined in step S12 as the channel capacity determined in step S12, in this embodiment, the current channel capacity of each base station is determined. The channel capacity is weighted and calculated to obtain the corresponding weighted channel capacity. In fact, the corresponding weighted channel capacity is obtained by weighted calculation of the channel capacity of the base station.

In a method for multi-base station roaming handover provided by an embodiment of the present invention, determining a base station among base stations with a weighted channel capacity greater than a corresponding data transmission rate as a base station to which a terminal needs to be handed over may include:

Calculate the channel margin of each base station according to the following formula:

Q(t,i)=Ca(t,i)-R(i);

Among them, Q(t,i) represents the channel margin at the current time of base station i, and R(i) represents the transmission data rate that the terminal needs to achieve under base station i;

It is determined that the base station with the largest value of Q(t,i) is the base station to which the terminal needs to be handed over.

It should be noted that when selecting the base station to which the terminal needs to be switched, any base station that meets the data transmission requirements of the terminal can be selected, or it can be achieved by calculating the channel margin of the base station. Specifically, the channel of the base station is defined in this application. The margin is the difference between the current channel capacity of the base station and the data transmission rate of the terminal under the base station. The larger the difference is, the richer the channel capacity provided by the corresponding base station to realize the data transmission of the terminal. Therefore, the channel is selected in this application. The base station with the largest margin is used as the base station to which the terminal needs to be handed over, which further ensures that the terminal can achieve data transmission at the maximum data transmission rate after the base station is switched.

A method for multi-base station roaming handover provided by an embodiment of the present invention, determining the channel capacity of each base station based on the signal-to-noise ratio of each base station, may include:

Determine the physical layer transmission mode of each base station, and determine the corresponding curve of the signal-to-noise ratio and the channel capacity corresponding to each base station in the respective physical layer transmission mode, and determine the corresponding signal-to-noise ratio of each base station from the determined curve. channel capacity.

It should be noted that, according to the physical layer transmission modes of different base stations, the staff can set the corresponding curve representing the correspondence between the signal-to-noise ratio and the channel capacity in advance. The abscissa of the curve can represent the signal-to-noise ratio, while the vertical The coordinates represent the channel capacity of the base station. Therefore, after the above curve is obtained, for any base station, after the point corresponding to the signal-to-noise ratio of any base station is determined on the corresponding curve of the physical layer transmission mode of the any base station, the point The value of the ordinate is the channel capacity of any base station, so the channel capacity of each base station can be easily and quickly obtained through the above curve, and it is suitable for intra-frequency/inter-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, which may include 16QAM modulation, QPSK modulation, etc. As shown in FIG. 2 , it means that when the physical layer transmission mode of the base station is 16QAM modulation, the The graph of the corresponding relationship between the noise ratio and the channel capacity is shown in Figure 3, which is a graph showing the corresponding relationship between the signal-to-noise ratio and the channel capacity during QPSK modulation in the physical layer transmission mode of the base station.

In addition, it should be noted that the staff can also obtain the corresponding quick calculation query table indicating the correspondence between the signal-to-noise ratio and the channel capacity according to the physical layer transmission modes of different base stations in advance, as shown in Table 1, which is the physical layer of the base station. The layer transmission mode is a quick calculation look-up table representing the correspondence between the signal-to-noise ratio and the channel capacity during 16QAM modulation, as shown in Table 2, which is the base station's physical layer transmission mode when QPSK modulation is used. The quick calculation query table of the corresponding relationship, thus, when it is necessary to determine the signal-to-noise ratio of any base station corresponding to the channel capacity, the signal-to-noise ratio of any base station can be located directly from the above-mentioned quick calculation query table, and then determine and locate to The signal-to-noise ratio corresponds to the channel capacity. This further simplifies the calculation operation.

Table 1

Table 2

In this embodiment, the technical solution disclosed in the present invention will be specifically described by taking an example that both the base station and the terminal use the orthogonal frequency division multiplexing OFDM technology for communication. The number of base stations is set to be 4. Among the 4 base stations, two base stations adopt 16QAM modulation mode, and two base stations adopt QPSK modulation mode. According to the different number of vacant subcarriers under different base stations, the data transmission rates that the terminal needs to achieve under the four base stations are respectively set as R1=1bit/s/Hz, R2=1.5bit/s/Hz, R3=0.8bit/s/ Hz, R4=2bit/s/Hz.

(1) Calculate the signal-to-noise ratio SNR_BS(t,i) of each base station by receiving the downlink broadcast channels of all base stations, where i represents different base stations, i=0, 1, 2, 3, i=0 represents the currently registered terminal base station.

(2) Determine the channel capacity of each base station based on the signal-to-noise ratio of each base station.

According to the physical layer transmission modes of different base stations, the channel capacity C(t,i) of each base station can be calculated through the set correspondence curve between the signal-to-noise ratio and the channel capacity, or through the quick calculation query table (Table 1 and Table 2). .

(3) Calculate the weighted channel capacity of each base station according to the following formula:

Ca(t,i)=aC(t,i)+(1-a)C(t-1,i);

Among them, a value is 0.95.

(4) According to the weighted channel capacity of each base station, the judgment of base station handover is realized according to the following steps:

(4.1) If Ca(t,0)>R(0), it is determined that the base station does not need to be switched;

(4.2) If Ca(t,0)≤R(0), then calculate Q(t,i)=Ca(t,i)-R(i);

(4.3) Select the base station i corresponding to the largest Q(t,i) as the base station to be handed over.

The invention calculates the channel capacity corresponding to the signal-to-noise ratio of each base station according to the physical layer transmission modes 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 base station switching Judgment amount. Therefore, the influencing factors such as signal-to-noise ratio, distance difference, base station spare data rate, etc., which are needed to realize base station handover in the prior art, are skillfully integrated into a single variable, thereby simplifying the multi-base station handover algorithm. And after actual testing, the above technical solution proposed by the present invention simplifies the multi-base station handover algorithm, and can ensure the data throughput rate of the terminal as large as possible while ensuring that the base station handover is sufficiently small.

An embodiment of the present invention also provides a device for roaming handover of multiple base stations, as shown in FIG. 4 , which may include:

The acquiring module 11 is used for: determining each base station located in the wireless system, the signal-to-noise ratio of each base station, and the transmission data rate that the terminal needs to realize under each base station;

The determining module 12 is configured to: determine the channel capacity of each base station based on the signal-to-noise ratio of each base station, and determine that the channel capacity of each base station is the current channel capacity of each base station;

The judging module 13 is used for: 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; One of the base stations is the base station to which the terminal needs to be handed over.

An apparatus for multi-base station roaming handover provided by an embodiment of the present invention may further include:

The calculation module is used for: before the judgment module judges 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, according to the following formula, weighted calculation is performed 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;

Among them, a is a preset parameter, i is the base station number, t is the current time, Ca(t,i) is the weighted channel capacity of the base station i at the current time, C(t,i) is the channel capacity of the base station i at the current time, C (t-1,i) represents the channel capacity of the base station i at the last moment; and is used to determine the weighted channel capacity of each base station as the current channel capacity of each base station.

In an apparatus for multi-base station roaming handover provided by an embodiment of the present invention, the judging module may include:

The selection unit is used to calculate the channel margin of each base station according to the following formula:

Q(t,i)=Ca(t,i)-R(i);

Among them, Q(t,i) represents the channel margin of base station i at the current time, and R(i) represents the transmission data rate that the terminal needs to achieve under base station i; The base station to switch to.

In an apparatus for multi-base station roaming handover provided by an embodiment of the present invention, the determining module may include:

The determining unit is configured to: determine the physical layer transmission mode of each base station, and determine the corresponding curve representing the corresponding relationship between the signal-to-noise ratio and the channel capacity of each base station under the respective physical layer transmission mode, and determine each base station from the determined curve. The channel capacity corresponding to the signal-to-noise ratio of the base station.

The embodiment of the present invention also provides a device for multi-base station roaming handover, which may include:

memory for storing computer programs;

The processor is configured to implement the steps of any of the above methods for roaming handover of multiple base stations when executing the computer program.

Embodiments of the present invention further provide 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 any of the above methods for roaming handover of multiple base stations can be implemented.

It should be noted that, for the description of the relevant parts of the apparatus, device and computer-readable storage medium for roaming handover of multiple base stations provided by the embodiment of the present invention, please refer to the corresponding description in the method for roaming handover of multiple base stations provided by the embodiment of the present invention. Part of the detailed description will not be repeated here. In addition, the parts of the above 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 descriptions.

The above description of the disclosed embodiments enables 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 implemented in 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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