CN105636126B - A kind of switch determining method and device - Google Patents

Abstract

The invention provides a handover judgment method and device, and relates to the technical field of wireless communication. The method includes: respectively acquiring the spectrum efficiency of the first cell and the second cell when the signal of the first cell and/or the signal of the second cell meet the basic handover condition; wherein, the second cell is the terminal's current Serving cell, the first cell is an adjacent cell of the second cell; comparing the spectral efficiencies of the first cell and the second cell, the spectral efficiency of the first cell is greater than that of the second cell In terms of efficiency, according to the spectral efficiency of the first cell, predict the service rate of the first cell after the terminal is handed over to the first cell; when the service rate of the first cell is greater than or equal to the expected service rate threshold, Execute handover, and handover the terminal to the first cell. The solution of the present invention solves the problem that the prior art cannot realize the difference of frequency spectrum efficiency and thus cannot effectively utilize frequency resources.

Description

A handover decision method and device

technical field

The present invention relates to the field of wireless communication, in particular to a handover judgment method and device.

Background technique

With the development of communication technology, the communication system has been diversified, such as: GSM (Global System for Mobile Communication, Global System for Mobile Communication) system, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access) system And LTE (Long Term Evolution, long-term evolution) system and the like. In order to improve user experience, when the mobile terminal is in different cells at the same time, it often selects the optimal cell through inter-system handover or intra-system handover.

The main measurement quantity of the existing inter-system handover is the beacon channel quality of each system, but the handover decision is made based on the signal strength. Although the basic requirements of service continuity can be guaranteed, the difference in spectral efficiency of each system cannot be realized, so it cannot Effective use of frequency resources, for example, for voice-based services, the bearing efficiency of the GSM system is about 0.0023mErl/Hz (considering 3*4 frequency reuse) and is constant within the coverage area, and the average downlink efficiency of the TD-LTE system is about 0.0033mErl /Hz (same frequency multiplexing, 20MHz carrier), but at the cell boundary, TD-LTE will drop to 0.0011mErl/Hz, which is lower than the GSM level.

Contents of the invention

The purpose of the present invention is to provide a handover judgment method and device, which increases the handover judgment of spectrum efficiency on the basis of handover conditions, which not only ensures the basic requirements of service continuity, but also realizes the difference of spectrum efficiency and effectively utilizes spectrum resources.

In order to achieve the above purpose, an embodiment of the present invention provides a handover decision method, including:

When the signal of the first cell and/or the signal of the second cell meet the basic handover condition, respectively acquire the spectral efficiency of the first cell and the second cell; wherein, the second cell is the current serving cell of the terminal, and the The first cell is an adjacent cell of the second cell;

Comparing the spectral efficiencies of the first cell and the second cell, when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell, according to the spectral efficiency of the first cell, it is predicted that the terminal will switch to the The traffic rate of the first cell after the first cell;

When the service rate of the first cell is greater than or equal to the expected service rate threshold, handover is performed, and the terminal is handed over to the first cell.

Wherein, acquiring the spectrum efficiencies of the second cell and the first cell respectively includes:

Obtain the system type of the current cell; wherein, the current cell is the first cell and the second cell;

According to the system type of the current cell, the parameter table corresponding to the current cell is searched to obtain the spectrum efficiency of the current cell.

Wherein, the spectral efficiency includes voice service spectral efficiency and data service spectral efficiency;

According to the system type of the current cell, search the parameter table corresponding to the current cell to obtain the spectrum efficiency of the current cell, including:

According to the system type of the current cell, look up the parameter table corresponding to the current cell, obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, and obtain the data service spectrum efficiency of the current cell;

According to the system type of the current cell, search the parameter table corresponding to the current cell, obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, and obtain the voice service spectrum efficiency of the current cell.

Wherein, according to the system type of the current cell, look up the parameter table corresponding to the current cell, obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, and obtain the data service spectrum efficiency of the current cell, including:

Obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, according to the formula:

Get the spectral efficiency of data services; where,

RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; THP _j is the throughput of the jth data service sampling point equal to the current channel SNR in the channel SNR statistics data, 1≤j≤n, n is the total number of data service sampling points equal to the current channel SNR; CB _j is the frequency bandwidth of the jth data service sampling point equal to the current channel SNR in the channel SNR statistical data.

Wherein, the system types include: Global Mobile Communications GSM system, Time Division Synchronous Code Division Multiple Access TD-SCDMA system and Long Term Evolution LTE system;

According to the system type of the current cell, look up the parameter table corresponding to the current cell, obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, and obtain the voice service spectrum efficiency of the current cell, including:

If the current cell is a GSM system or a TD-SCDMA system, look up the parameter table corresponding to the current cell, and directly obtain the voice service spectrum efficiency corresponding to the current cell;

If the current cell is an LTE system, search the parameter table corresponding to the current cell, and obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, that is, the reference signal reception quality statistical data, according to the formula:

The spectral efficiency of the voice service is obtained; among them, RAT–SE' is the data service spectral efficiency corresponding to the current reference signal reception quality; TTI _DLsubframe/a is the number of downlink subframes in the preset time period a; RBs _j is the statistics of the reference signal reception quality The number of data packets used in each transmission time interval corresponding to the jth speech service sampling point equal to the current reference signal reception quality in the data, 1≤j≤n, n is the total number of speech service sampling points equal to the current reference signal reception quality ; TTI _j is the number of transmission time intervals corresponding to the jth voice service sampling point equal to the current reference signal reception quality in the reference signal reception quality statistical data; μ _DL is the proportion of downlink resources.

Wherein, comparing the spectral efficiencies of the first cell and the second cell, when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell, according to the spectral efficiency of the first cell, it is predicted that the terminal switches to The service rate of the first cell after the first cell includes:

Comparing the voice service spectral efficiency of the first cell and the voice service spectral efficiency of the second cell, the data service spectral efficiency of the first cell and the data service spectral efficiency of the second cell;

When the voice service spectral efficiency of the first cell is greater than the voice service spectral efficiency of the second cell and the data service spectral efficiency of the first cell is greater than the data service spectral efficiency of the second cell, according to the formula:

RAT-THR=RAT-SE×BW, obtain the service rate of the first cell after the terminal switches to the first cell; where,

RAT-THR is the service rate of the first cell corresponding to the current channel SNR; RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; BW is the channel bandwidth.

In order to achieve the above purpose, an embodiment of the present invention also provides a handover judgment device, including:

An acquiring module, configured to respectively acquire the spectral efficiencies of the first cell and the second cell when the signal of the first cell and/or the signal of the second cell meet a basic handover condition; wherein the second cell is the terminal's current The serving cell of the first cell is a neighboring cell of the second cell;

A processing module, configured to compare the spectral efficiencies of the first cell and the second cell, and predict according to the spectral efficiency of the first cell when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell The service rate of the first cell after the terminal is handed over to the first cell;

A handover execution module, configured to perform handover when the service rate of the first cell is greater than or equal to the expected service rate threshold, and handover the terminal to the first cell.

Wherein, the acquisition module includes:

The first obtaining submodule is used to obtain the system type of the current cell; wherein, the current cell is the first cell and the second cell;

The second acquisition sub-module is configured to search the parameter table corresponding to the current cell according to the system type of the current cell, and obtain the spectrum efficiency of the current cell.

Wherein, the spectral efficiency includes voice service spectral efficiency and data service spectral efficiency;

The second acquisition submodule includes:

The first obtaining unit is used to search the parameter table corresponding to the current cell according to the system type of the current cell, obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, and obtain the data service spectrum efficiency of the current cell;

The second acquisition unit is configured to search the parameter table corresponding to the current cell according to the system type of the current cell, obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, and obtain the voice service spectrum efficiency of the current cell.

Wherein, the first acquisition unit includes:

The first obtaining subunit is used to obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, according to the formula:

Get the spectral efficiency of data services; where,

RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; THP _j is the throughput of the jth data service sampling point equal to the current channel SNR in the channel SNR statistics data, 1≤j≤n, n is the total number of data service sampling points equal to the current channel SNR; CB _j is the frequency bandwidth of the jth data service sampling point equal to the current channel SNR in the channel SNR statistical data.

Wherein, the system types include: Global Mobile Communications GSM system, Time Division Synchronous Code Division Multiple Access TD-SCDMA system and Long Term Evolution LTE system;

The second acquisition unit includes:

The second obtaining subunit is used to search the parameter table corresponding to the current cell when the current cell is a GSM system or a TD-SCDMA system, and directly obtain the voice service spectrum efficiency corresponding to the current cell;

The third acquisition subunit is used to search the parameter table corresponding to the current cell when the current cell is an LTE system, and obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, that is, the reference signal reception quality statistical data, according to the formula :

The spectral efficiency of the voice service is obtained; among them, RAT–SE' is the data service spectral efficiency corresponding to the current reference signal reception quality; TTI _DLsubframe/a is the number of downlink subframes in the preset time period a; RBs _j is the statistics of the reference signal reception quality The number of data packets used in each transmission time interval corresponding to the jth speech service sampling point equal to the current reference signal reception quality in the data, 1≤j≤n, n is the total number of speech service sampling points equal to the current reference signal reception quality ; TTI _j is the number of transmission time intervals corresponding to the jth voice service sampling point equal to the current reference signal reception quality in the reference signal reception quality statistical data; μ _DL is the proportion of downlink resources.

Wherein, the processing module includes:

The first processing submodule is used to compare the voice service spectral efficiency of the first cell and the voice service spectral efficiency of the second cell, the data service spectral efficiency of the first cell and the data service spectral efficiency of the second cell;

The second processing submodule is used for when the voice service spectral efficiency of the first cell is greater than the voice service spectral efficiency of the second cell and the data service spectral efficiency of the first cell is greater than the data service spectral efficiency of the second cell, according to the formula:

RAT-THR=RAT-SE×BW, obtain the service rate of the first cell after the terminal switches to the first cell; where,

RAT-THR is the service rate of the first cell corresponding to the current channel SNR; RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; BW is the channel bandwidth.

The beneficial effects of above-mentioned technical scheme of the present invention are as follows:

In the handover judging method of the embodiment of the present invention, by acquiring the signal of the first cell and the signal of the second cell, it is judged whether the basic handover condition is met, and after the basic handover condition is met, the spectrum efficiency of the current serving cell of the terminal, that is, the second cell, is respectively obtained, And the spectral efficiency of the adjacent cell of the second cell, that is, the first cell, compare the spectral efficiency of the first cell and the second cell, and predict terminal switching when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell The service rate of the first cell after the first cell, so that when the service rate of the first cell is greater than or equal to the expected threshold of the service rate, handover can be performed, and the terminal is handed over to the first cell. Since the handover decision of spectrum efficiency is added to meet the basic handover conditions, it not only ensures the basic requirements of service continuity, but also realizes the difference of spectrum efficiency and effectively utilizes spectrum resources.

Description of drawings

Fig. 1 shows the flow chart of the steps of the handover judgment method of the embodiment of the present invention;

Fig. 2 shows a schematic structural diagram of a handover judging device according to an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Aiming at the existing handover judgment, the main measurement quantity is the quality of the beacon channel, and the difference in spectrum efficiency cannot be realized, so that frequency resources cannot be effectively used, and a handover judgment method is provided to increase the spectrum efficiency on the basis of handover conditions. The handover decision can not only ensure the basic requirements of service continuity, but also realize the difference of spectrum efficiency and effectively use spectrum resources.

As shown in FIG. 1, a handover decision method in an embodiment of the present invention includes:

Step 11, when the signal of the first cell and/or the signal of the second cell meet the basic handover condition, respectively acquire the spectral efficiency of the first cell and the second cell; wherein, the second cell is the current service of the terminal a cell, the first cell is an adjacent cell of the second cell;

Step 12: Comparing the spectral efficiency of the first cell and the second cell, when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell, predicting terminal handover according to the spectral efficiency of the first cell to the traffic rate of the first cell after the first cell;

Step 13: When the service rate of the first cell is greater than or equal to the expected service rate threshold, perform handover, and handover the terminal to the first cell.

When switching between systems, the basic switching condition is A1/A2+B2 event, where A1 event indicates that the quality of the second cell is higher than a certain threshold, A2 event indicates that the quality of the second cell is lower than a certain threshold, and B2 event indicates that the quality of the second cell It is lower than a certain threshold and the quality of the first cell of the different system is higher than a certain threshold. By obtaining the signal of the first cell and the signal of the second cell, it is judged whether the basic handover condition is met. After the basic handover condition is met, follow the above steps to obtain the current serving cell of the terminal, which is the second cell, and the adjacent cell of the second cell. That is, the spectral efficiency of the first cell. Compare the spectral efficiency of the first cell and the second cell. When the spectral efficiency of the first cell is greater than that of the second cell, predict the first cell after the terminal switches to the first cell. In this way, when the service rate of the first cell is greater than or equal to the expected threshold of the service rate, handover can be performed, and the terminal is handed over to the first cell. Adding the handover judgment of spectrum efficiency to the basic handover conditions can not only ensure the basic requirements of service continuity, but also realize the difference of spectrum efficiency and effectively use spectrum resources.

When the first cell and the second cell have the same LTE system, the existing solution cannot guarantee the user's best rate experience when making indoor and outdoor handover decisions. The following table shows the execution results of the existing indoor and outdoor handover mechanism. After switching from an indoor cell to an outdoor cell, the efficiency drops significantly.

Therefore, the above method is also applicable to cell handover in the LTE system. At this time, the basic handover condition is an event of A3 (same frequency) or A1/A2+A5 (different frequency), where A3 means that the quality of the first cell of the same frequency/different frequency is similar. The quality of the second cell is higher than a certain threshold, and the A5 event indicates that the quality of the second cell is lower than a certain threshold, and at the same time, the quality of the first inter-frequency cell is higher than a certain threshold. Subsequently, according to the above steps, when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell, and the service rate of the first cell reaches the expected service rate threshold, handover can be performed, and the terminal is handed over to the first cell. Adding the handover judgment of spectrum efficiency to the basic handover conditions can not only ensure the basic requirements of service continuity, but also realize the difference of spectrum efficiency and effectively use spectrum resources.

Of course, in the embodiment of the present invention, the adjacent cell of the second cell, that is, the first cell, may be one or more cells in practical applications.

It should be known that for cells of different systems, the ways of obtaining their spectrum efficiencies are different. Therefore, in the embodiment of the present invention, in step 11, the spectrums of the second cell and the first cell are respectively obtained efficiency, including:

Step 111, obtaining the system type of the current cell; wherein, the current cell is the first cell and the second cell;

Step 112, according to the system type of the current cell, search the parameter table corresponding to the current cell to obtain the spectrum efficiency of the current cell. To obtain the spectral efficiency of the first cell and the second cell, it can be processed simultaneously or separately. First, obtain the system type of the current suburb, that is, the cell (first cell and second cell) that is currently being processed. After confirming its system type, it can be searched The corresponding parameter table, so as to obtain its spectral efficiency according to the relevant parameters in the parameter table.

In the embodiment of the present invention, the spectral efficiency includes voice service spectral efficiency and data service spectral efficiency;

Therefore, to separately obtain the spectral efficiency of the voice service and the spectral efficiency of the data service, on the basis of the above-mentioned embodiments, in the handover judgment method of the embodiment of the present invention, step 112 includes:

Step 1121, according to the system type of the current cell, look up the parameter table corresponding to the current cell, obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, and obtain the data service spectrum efficiency of the current cell;

Step 1122, according to the system type of the current cell, search the parameter table corresponding to the current cell, obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, and obtain the voice service spectrum efficiency of the current cell.

Wherein, step 1121 includes:

Step 11211, obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, according to the formula:

Get the spectral efficiency of data services; where,

RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; THP _j is the throughput of the jth data service sampling point equal to the current channel SNR in the channel SNR statistics data, 1≤j≤n, n is the total number of data service sampling points equal to the current channel SNR; CB _j is the frequency bandwidth of the jth data service sampling point equal to the current channel SNR in the channel SNR statistical data.

Taking the currently processed cell as an LTE system as an example, the channel signal-to-noise ratio depends on RSRQ (ReferenceSignalReceivingQuality, reference signal receiving quality) measurement, and RAT-SE can be expressed as RAT _LTE -SEi at this time, which refers to the current RSRQ=i corresponding to the LTE system. Spectrum efficiency of the data service, the required data can be obtained from the parameter table corresponding to the LTE system, THP _j is the throughput of the data service sampling point of the jth RSRQ=i, and CB _j is the data of the jth RSRQ=i The frequency bandwidth of the service sampling point, n is the total number of data service sampling points with RSRQ=i, these are substituted into the above formula, and the data service spectrum efficiency of the current LTE cell can be obtained. Similar to the GSM system, the channel SNR depends on the broadcast control channel carrier-to-interference ratio BCCH C/I measurement, and the TD-SCDMA system channel SNR depends on the basic public control channel carrier-to-interference ratio PCCPCH C/I measurement.

The above-mentioned steps give the implementation manner of obtaining the spectral efficiency of the data service, and the following provides the obtaining of the spectral efficiency of the voice service. The system type includes: Global Mobile Communications GSM system, Time Division Synchronous Code Division Multiple Access TD-SCDMA system and Long Term Evolution LTE system; Step 1122 includes:

Step 11221, if the current cell is a GSM system or a TD-SCDMA system, search the parameter table corresponding to the current cell, and directly obtain the voice service spectrum efficiency corresponding to the current cell;

Step 11221', if the current cell is an LTE system, search the parameter table corresponding to the current cell, and obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, that is, the reference signal reception quality statistical data, according to the formula:

The spectral efficiency of the voice service is obtained; among them, RAT–SE' is the data service spectral efficiency corresponding to the current reference signal reception quality; TTI _DLsubframe/a is the number of downlink subframes in the preset time period a; RBs _j is the statistics of the reference signal reception quality The number of data packets used in each transmission time interval corresponding to the jth speech service sampling point equal to the current reference signal reception quality in the data, 1≤j≤n, n is the total number of speech service sampling points equal to the current reference signal reception quality ; TTI _j is the number of transmission time intervals corresponding to the jth voice service sampling point equal to the current reference signal reception quality in the reference signal reception quality statistical data; μ _DL is the proportion of downlink resources.

Since the GSM system and the TD-SCDMA system are carried by the circuit CS, and the voice service spectrum efficiency of the GSM system and the TD-SCDMA system is a fixed value, according to step 11221, the parameter table corresponding to the current cell can be found, and the corresponding parameter table of the current cell can be obtained directly from it. Spectrum efficiency of voice services. For a cell of the LTE system, according to step 11221', search the parameter table corresponding to the current cell, and obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, that is, the reference signal reception quality statistical data, RAT-SE' can now Denoted as RAT _LTE -SEi', it refers to the voice service spectrum efficiency corresponding to the current RSRQ=i under the LTE system, and the required data can be obtained from the parameter table corresponding to the LTE system, and RBs _j is the voice of the jth RSRQ=i The number of data packets used for each transmission time interval corresponding to the service sampling point, TTI _j is the number of transmission time intervals corresponding to the jth RSRQ=i voice service sampling point, and n is the total number of RSRQ=i data service sampling points , TTI _DLsubframe/a is the number of downlink subframes in the preset time period a, and μ _DL is the proportion of downlink resources. Substituting these into the above formula, the voice service spectrum efficiency of the current LTE cell can be obtained. In the embodiment of the present invention, preferably a is 20ms.

After obtaining the spectral efficiencies of the first cell and the second cell, the next step, step 12, includes:

Step 121, comparing the voice service spectral efficiency of the first cell and the voice service spectral efficiency of the second cell, the data service spectral efficiency of the first cell and the data service spectral efficiency of the second cell;

Step 122, when the voice service spectral efficiency of the first cell is greater than the voice service spectral efficiency of the second cell and the data service spectral efficiency of the first cell is greater than the data service spectral efficiency of the second cell, according to the formula:

RAT-THR=RAT-SE×BW, obtain the service rate of the first cell after the terminal switches to the first cell; where,

RAT-THR is the service rate of the first cell corresponding to the current channel SNR; RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; BW is the channel bandwidth.

First, according to step 121, the comparison of the spectral efficiencies of the first cell and the second cell is completed, and when the spectral efficiency of the first cell is greater than that of the second cell, according to step 122, the service rate of the first cell after handover is predicted. Continuing the LTE system as an example, RAT–SE in the above formula can be expressed as RAT _LTE –SEi, that is, the spectral efficiency of the data service corresponding to the current RSRQ=i in the LTE system, according to the obtained RAT _LTE –SEi and channel bandwidth BW of the first cell , into the formula to get the service rate of the first cell. Similar to the GSM system, the channel SNR depends on the broadcast control channel carrier-to-interference ratio BCCH C/I measurement, and the TD-SCDMA system channel SNR depends on the basic public control channel carrier-to-interference ratio PCCPCH C/I measurement.

Then, compare the obtained service rate of the first cell with the expected threshold of the service rate, and judge whether the first cell meets the service demand after the handover. Only when the service rate of the first cell predicted can meet the service demand, can the user service be guaranteed after the handover normal. Finally, when the service rate of the first cell is greater than or equal to the expected service rate threshold, handover is performed, and the terminal is handed over to the first cell.

To sum up, the handover judgment method of the embodiment of the present invention, on the basis of the traditional handover mechanism, provides a handover strategy based on the spectrum efficiency of the cell and the predicted service rate of the cell after the handover, so as to realize the handover between cells of different systems and the same operation. The spectrum efficiency of the inter-cell handover of the LTE system is maximized; at the same time, a method for calculating the spectrum efficiency of each system cell is proposed for the voice service and data service, and the statistical results of the cell spectrum efficiency are dynamically maintained, and the spectrum efficiency and signal quality are matched. Realize switching based on spectrum efficiency according to signal quality; effectively improve the comprehensive spectrum utilization efficiency of the entire network in multi-network collaboration scenarios, which has a significant effect on improving network spectrum utilization efficiency and improving user experience.

As shown in Figure 2, an embodiment of the present invention also provides a handover decision device, including:

The acquisition module 10 is configured to acquire the spectrum efficiency of the first cell and the second cell respectively when the signal of the first cell and/or the signal of the second cell meet the basic handover condition; wherein the second cell is a terminal The current serving cell, the first cell is a neighboring cell of the second cell;

The processing module 20 is configured to compare the spectral efficiency of the first cell and the second cell, and when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell, according to the spectral efficiency of the first cell, Predicting the service rate of the first cell after the terminal is handed over to the first cell;

A handover executing module 30, configured to execute handover when the service rate of the first cell is greater than or equal to an expected service rate threshold, and handover the terminal to the first cell.

Wherein, the acquisition module includes:

The first obtaining submodule is used to obtain the system type of the current cell; wherein, the current cell is the first cell and the second cell;

The second acquisition sub-module is configured to search the parameter table corresponding to the current cell according to the system type of the current cell, and obtain the spectrum efficiency of the current cell.

Wherein, the spectral efficiency includes voice service spectral efficiency and data service spectral efficiency;

The second acquisition submodule includes:

The first obtaining unit is used to search the parameter table corresponding to the current cell according to the system type of the current cell, obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, and obtain the data service spectrum efficiency of the current cell;

The second acquisition unit is configured to search the parameter table corresponding to the current cell according to the system type of the current cell, obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, and obtain the voice service spectrum efficiency of the current cell.

Wherein, the first acquisition unit includes:

The first obtaining subunit is used to obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table, according to the formula:

Get the spectral efficiency of data services; where,

RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; THP _j is the throughput of the jth data service sampling point equal to the current channel SNR in the channel SNR statistics data, 1≤j≤n, n is the total number of data service sampling points equal to the current channel SNR; CB _j is the frequency bandwidth of the jth data service sampling point equal to the current channel SNR in the channel SNR statistical data.

Wherein, the system types include: Global Mobile Communications GSM system, Time Division Synchronous Code Division Multiple Access TD-SCDMA system and Long Term Evolution LTE system;

The second acquisition unit includes:

The second obtaining subunit is used to search the parameter table corresponding to the current cell when the current cell is a GSM system or a TD-SCDMA system, and directly obtain the voice service spectrum efficiency corresponding to the current cell;

The third acquisition subunit is used to search the parameter table corresponding to the current cell when the current cell is an LTE system, and obtain the channel signal-to-noise ratio statistical data of the voice service in the parameter table, that is, the reference signal reception quality statistical data, according to the formula :

The spectral efficiency of the voice service is obtained; among them, RAT–SE' is the data service spectral efficiency corresponding to the current reference signal reception quality; TTI _DLsubframe/a is the number of downlink subframes in the preset time period a; RBs _j is the statistics of the reference signal reception quality The number of data packets used in each transmission time interval corresponding to the jth speech service sampling point equal to the current reference signal reception quality in the data, 1≤j≤n, n is the total number of speech service sampling points equal to the current reference signal reception quality ; TTI _j is the number of transmission time intervals corresponding to the jth voice service sampling point equal to the current reference signal reception quality in the reference signal reception quality statistical data; μ _DL is the proportion of downlink resources.

Wherein, the processing module includes:

The first processing submodule is used to compare the voice service spectral efficiency of the first cell and the voice service spectral efficiency of the second cell, the data service spectral efficiency of the first cell and the data service spectral efficiency of the second cell;

The second processing submodule is used for when the voice service spectral efficiency of the first cell is greater than the voice service spectral efficiency of the second cell and the data service spectral efficiency of the first cell is greater than the data service spectral efficiency of the second cell, according to the formula:

RAT-THR=RAT-SE×BW, obtain the service rate of the first cell after the terminal switches to the first cell; where,

RAT-THR is the service rate of the first cell corresponding to the current channel SNR; RAT-SE is the data service spectral efficiency corresponding to the current channel SNR; BW is the channel bandwidth.

The handover judging device of the embodiment of the present invention provides a handover strategy based on the cell spectrum efficiency and predicted cell service rate after handover on the basis of the traditional handover mechanism, and realizes handover between cells of different systems and between cells of the same LTE system. The spectrum efficiency of handover is maximized; at the same time, a method for calculating the spectrum efficiency of each system cell is proposed for the voice service and data service, and the statistical results of the cell spectrum efficiency are dynamically maintained, and the spectrum efficiency and signal quality are matched. Switching of spectrum efficiency; effectively improving the comprehensive spectrum utilization efficiency of the entire network in multi-network collaboration scenarios, which has a significant effect on improving network spectrum utilization efficiency and improving user experience.

It should be noted that this device is a device that applies the above handover decision method, and the implementation of the handover decision method is applicable to the embodiment of the device, and can also achieve the same technical effect.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (12)

1. A handover decision method, comprising:

respectively acquiring the frequency spectrum efficiency of a first cell and the frequency spectrum efficiency of a second cell when a first cell signal and/or a second cell signal reach a basic switching condition; the second cell is a current service cell of a terminal, and the first cell is an adjacent cell of the second cell;

comparing the spectral efficiencies of the first cell and the second cell, and predicting the service rate of the first cell after the terminal is switched to the first cell according to the spectral efficiency of the first cell when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell;

when the service rate of the first cell is greater than or equal to the expected threshold of the service rate, executing switching and switching the terminal to the first cell; the spectrum efficiency comprises voice service spectrum efficiency and data service spectrum efficiency;

the basic handover condition includes an a1/a2+ B2 event, an A3 event, or an a1/a2+ a5 event, wherein the a1 event indicates that the second cell quality is higher than the first threshold, the a2 event indicates that the second cell quality is lower than the second threshold, the B2 event indicates that the second cell quality is lower than the third threshold and the inter-system first cell quality is higher than the fourth threshold, the A3 event indicates that the intra-frequency/inter-frequency first cell quality is higher than the fifth threshold compared to the second cell quality, and the a5 event indicates that the second cell quality is lower than the sixth threshold while the inter-frequency first cell quality is higher than the seventh threshold.

2. The handover decision method according to claim 1, wherein separately obtaining the spectrum efficiency of the second cell and the spectrum efficiency of the first cell comprises:

obtaining a system type of a current cell; the current cell is a first cell and a second cell;

and searching a parameter table corresponding to the current cell according to the system type of the current cell to obtain the spectrum efficiency of the current cell.

3. The handover decision method according to claim 2,

according to the system type of the current cell, searching a parameter table corresponding to the current cell to obtain the spectrum efficiency of the current cell, comprising:

according to the system type of the current cell, searching a parameter table corresponding to the current cell, and acquiring channel signal-to-noise ratio statistical data of the data service in the parameter table to obtain the frequency spectrum efficiency of the data service of the current cell;

according to the system type of the current cell, searching a parameter table corresponding to the current cell, and acquiring the channel signal-to-noise ratio statistical data of the voice service in the parameter table to obtain the frequency spectrum efficiency of the voice service of the current cell.

4. The handover decision method of claim 3, wherein the step of searching the parameter table corresponding to the current cell according to the system type of the current cell to obtain the channel signal-to-noise ratio statistical data of the data service in the parameter table to obtain the spectrum efficiency of the data service in the current cell comprises:

acquiring channel signal-to-noise ratio statistical data of the data service in the parameter table, and according to a formula:

obtaining the frequency spectrum efficiency of the data service; wherein,

RAT-SE is the frequency spectrum efficiency of the data service corresponding to the signal-to-noise ratio of the current channel; THP_jThe throughput of the jth data service sampling point equal to the signal-to-noise ratio of the current channel in the channel signal-to-noise ratio statistical data is larger than or equal to 1 and smaller than or equal to n, and n is the total number of the data service sampling points equal to the signal-to-noise ratio of the current channel; CB (CB)_jAnd the frequency bandwidth of the jth data service sampling point which is equal to the current channel signal-to-noise ratio in the channel signal-to-noise ratio statistical data is obtained.

5. The handover decision method according to claim 3, wherein the system type comprises: a global system for mobile communication (GSM) system, a time division synchronous code division multiple access (TD-SCDMA) system and a Long Term Evolution (LTE) system;

according to the system type of the current cell, searching a parameter table corresponding to the current cell, acquiring the channel signal-to-noise ratio statistical data of the voice service in the parameter table, and acquiring the frequency spectrum efficiency of the voice service of the current cell, wherein the method comprises the following steps:

if the current cell is a GSM system or a TD-SCDMA system, searching a parameter table corresponding to the current cell, and directly obtaining the frequency spectrum efficiency of the voice service corresponding to the current cell;

if the current cell is an LTE system, searching a parameter table corresponding to the current cell, acquiring channel signal-to-noise ratio statistical data of voice service in the parameter table, namely reference signal receiving quality statistical data, and according to a formula:

obtaining the frequency spectrum efficiency of the voice service; wherein, the RAT-SE' is the voice service spectrum efficiency corresponding to the current reference signal receiving quality; TTI_DLsubframe/aThe number of downlink subframes in a preset time period a is set; RBs_jThe number of data packets used in each transmission time interval corresponding to the jth voice service sampling point equal to the current reference signal receiving quality in the reference signal receiving quality statistical data is larger than or equal to 1 and smaller than or equal to n, and n is the total number of the voice service sampling points equal to the current reference signal receiving quality; TTI_jThe number of transmission time intervals correspondingly used by the jth voice service sampling point equal to the current reference signal receiving quality in the reference signal receiving quality statistical data; mu.s_DLIs the downlink resource proportion.

6. The handover decision method according to claim 4, wherein comparing the spectral efficiencies of the first cell and the second cell, and when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell, predicting the traffic rate of the first cell after the terminal is handed over to the first cell according to the spectral efficiency of the first cell comprises:

comparing the voice service spectrum efficiency of the first cell with the voice service spectrum efficiency of the second cell, and comparing the data service spectrum efficiency of the first cell with the data service spectrum efficiency of the second cell;

when the voice service spectrum efficiency of the first cell is greater than the voice service spectrum efficiency of the second cell and the data service spectrum efficiency of the first cell is greater than the data service spectrum efficiency of the second cell, according to a formula:

obtaining the service rate of a first cell after the terminal is switched to the first cell by RAT-THR (RAT-THR) ═ RAT-SE (maximum Rate-bandwidth resource) multiplied by BW; wherein,

RAT-THR is the service rate of a first cell corresponding to the signal-to-noise ratio of the current channel; RAT-SE is the frequency spectrum efficiency of the data service corresponding to the signal-to-noise ratio of the current channel; BW is the channel bandwidth.

7. A handover decision apparatus, comprising:

an obtaining module, configured to obtain spectral efficiencies of a first cell and a second cell respectively when a first cell signal and/or a second cell signal reach a basic handover condition; the second cell is a current service cell of a terminal, and the first cell is an adjacent cell of the second cell;

the processing module is used for comparing the spectral efficiencies of the first cell and the second cell, and predicting the service rate of the first cell after the terminal is switched to the first cell according to the spectral efficiency of the first cell when the spectral efficiency of the first cell is greater than the spectral efficiency of the second cell;

a handover execution module, configured to execute handover to handover a terminal to the first cell when a traffic rate of the first cell is greater than or equal to a traffic rate expected threshold; wherein,

the spectrum efficiency comprises voice service spectrum efficiency and data service spectrum efficiency;

the basic handover condition includes an a1/a2+ B2 event, an A3 event, or an a1/a2+ a5 event, wherein the a1 event indicates that the second cell quality is higher than the first threshold, the a2 event indicates that the second cell quality is lower than the second threshold, the B2 event indicates that the second cell quality is lower than the third threshold and the inter-system first cell quality is higher than the fourth threshold, the A3 event indicates that the intra-frequency/inter-frequency first cell quality is higher than the fifth threshold compared to the second cell quality, and the a5 event indicates that the second cell quality is lower than the sixth threshold while the inter-frequency first cell quality is higher than the seventh threshold.

8. The handover decision device of claim 7, wherein the obtaining module comprises:

the first obtaining submodule is used for obtaining the system type of the current cell; the current cell is a first cell and a second cell;

and the second obtaining submodule is used for searching a parameter table corresponding to the current cell according to the system type of the current cell to obtain the frequency spectrum efficiency of the current cell.

9. The handover decision device of claim 8,

the second acquisition sub-module includes:

the first acquisition unit is used for searching a parameter table corresponding to the current cell according to the system type of the current cell, acquiring channel signal-to-noise ratio statistical data of the data service in the parameter table and obtaining the frequency spectrum efficiency of the data service of the current cell;

and the second acquisition unit is used for searching a parameter table corresponding to the current cell according to the system type of the current cell, acquiring the channel signal-to-noise ratio statistical data of the voice service in the parameter table and obtaining the frequency spectrum efficiency of the voice service of the current cell.

10. The handover decision device of claim 9, wherein the first obtaining unit comprises:

a first obtaining subunit, configured to obtain channel signal-to-noise ratio statistical data of the data service in the parameter table, according to a formula:

obtaining the frequency spectrum efficiency of the data service; wherein,

RAT-SE is the frequency spectrum efficiency of the data service corresponding to the signal-to-noise ratio of the current channel; THP_jThe throughput of the jth data service sampling point equal to the signal-to-noise ratio of the current channel in the channel signal-to-noise ratio statistical data is larger than or equal to 1 and smaller than or equal to n, and n is the total number of the data service sampling points equal to the signal-to-noise ratio of the current channel; CB (CB)_jAnd the frequency bandwidth of the jth data service sampling point which is equal to the current channel signal-to-noise ratio in the channel signal-to-noise ratio statistical data is obtained.

11. The handover decision device of claim 9, wherein the system type comprises: a global system for mobile communication (GSM) system, a time division synchronous code division multiple access (TD-SCDMA) system and a Long Term Evolution (LTE) system;

the second acquisition unit includes:

the second acquiring subunit is used for searching a parameter table corresponding to the current cell when the current cell is a GSM system or a TD-SCDMA system, and directly acquiring the frequency spectrum efficiency of the voice service corresponding to the current cell;

a third obtaining subunit, configured to, when the current cell is an LTE system, search a parameter table corresponding to the current cell, obtain channel signal-to-noise ratio statistical data of a voice service in the parameter table, that is, reference signal reception quality statistical data, and according to a formula:

obtaining the frequency spectrum efficiency of the voice service; wherein, the RAT-SE' is the voice service spectrum efficiency corresponding to the current reference signal receiving quality; TTI_DLsubframe/aThe number of downlink subframes in a preset time period a is set; RBs_jThe number of data packets used in each transmission time interval corresponding to the jth voice service sampling point equal to the current reference signal receiving quality in the reference signal receiving quality statistical data is larger than or equal to 1 and smaller than or equal to n, and n is the total number of the voice service sampling points equal to the current reference signal receiving quality; TTI_jThe number of transmission time intervals correspondingly used by the jth voice service sampling point equal to the current reference signal receiving quality in the reference signal receiving quality statistical data; mu.s_DLIs the downlink resource proportion.

12. The handover decision device of claim 10, wherein the processing module comprises:

the first processing submodule is used for comparing the voice service spectrum efficiency of the first cell with the voice service spectrum efficiency of the second cell and comparing the data service spectrum efficiency of the first cell with the data service spectrum efficiency of the second cell;

a second processing submodule, configured to, when the spectrum efficiency of the voice service in the first cell is greater than the spectrum efficiency of the voice service in the second cell and the spectrum efficiency of the data service in the first cell is greater than the spectrum efficiency of the data service in the second cell, according to a formula:

obtaining the service rate of a first cell after the terminal is switched to the first cell by RAT-THR (RAT-THR) ═ RAT-SE (maximum Rate-bandwidth resource) multiplied by BW; wherein,

RAT-THR is the service rate of a first cell corresponding to the signal-to-noise ratio of the current channel; RAT-SE is the frequency spectrum efficiency of the data service corresponding to the signal-to-noise ratio of the current channel; BW is the channel bandwidth.