CN108632925B - Method and system for selecting a base station - Google Patents

Abstract

The invention discloses a base station selection method, which comprises the following steps: when the source base station judges that the channel quality of the terminal exceeds a preset channel quality range, sending uplink detection signal configuration information of a frequency point currently accessed by the terminal to an adjacent base station; receiving target base station selection judgment information sent by a neighbor base station supporting frequency points; and when the switching base station can be determined for the terminal based on the target base station selection judgment information, taking the determined switching base station as the target base station of the terminal. The invention also discloses a base station selection system.

Description

Method and system for selecting a base station

technical field

The present invention relates to wireless signal detection technology in mobile communication, in particular to a base station selection method and system.

Background technique

In the prior art, the terminal needs to select a new serving base station when the channel quality deteriorates, so it needs to measure the base station and select the target base station that meets the handover conditions for handover. As shown in Figures 1 and 2, in the LTE network, the measurement process is mainly It includes the following three steps:

1. Measurement configuration: The measurement configuration is mainly informed by the base station of the measurement configuration message to the terminal through the measurement information element (meas) configuration information element (Config) carried by the connection reconfiguration information (Connection Reconfigurtion) of the radio resource control (RRC Radio Resource Control), It includes the objects that the terminal needs to measure, the cell list, the reporting method, the measurement identifier, and event parameters.

2. Measurement execution: The terminal will measure the current serving cell.

3. Measurement report: The measurement report trigger mode is divided into periodic and event trigger. When the measurement report condition is satisfied, the terminal fills in the measurement result in a measurement report (Measurement Report) message and sends it to the base station.

With the development of the network, there will be more and more nodes similar to the base station. If the measurement methods shown in Figures 1 and 2 are still used, the configuration and reporting process will become more and more complicated. For the terminal, the complicated measurement process will greatly increase the power consumption of the terminal on the one hand, and reduce the throughput of the terminal and affect the user experience on the other hand. Therefore, a possible solution in the prior art is to use the uplink measurement at the base station to replace the downlink measurement at the terminal in the existing LTE system. Specifically, the terminal sends an uplink sounding signal, and the base station measures the uplink sounding signal to obtain the channel quality of the terminal. However, there is currently no detailed definition for the sounding signal in this method, and no corresponding base station selection process has been formulated.

SUMMARY OF THE INVENTION

In view of this, the embodiments of the present invention expect to provide a method and system for selecting a base station, which can ensure the accuracy and timeliness of base station selection without increasing the power consumption of the terminal and without affecting the throughput of the terminal.

In order to achieve the above-mentioned purpose, the technical scheme of the embodiment of the present invention is realized as follows:

An embodiment of the present invention provides a method for selecting a base station, including:

When the source base station judges that the terminal channel quality exceeds the preset channel quality range,

sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the neighboring base station;

Receive target base station selection judgment information sent by a neighboring base station supporting the frequency point;

When the handover base station can be determined for the terminal based on the target base station selection judgment information, the determined handover base station is used as the target base station of the terminal.

In the above solution, when it is not possible to determine a handover base station for the terminal based on the target base station selection judgment information, the method further includes:

The source base station sends the inter-frequency downlink reference signal information of the neighbor base station to the terminal;

Receive an inter-frequency measurement result sent by the terminal, determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as a target base station of the terminal.

In the above solution, the determining of the handover base station for the terminal based on the target base station selection judgment information includes:

The source base station determines at least one intra-frequency handover base station that satisfies the first handover condition based on the target base station selection judgment information, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the same-frequency handover base stations.

In the above solution, the uplink sounding signal configuration information includes at least one of the following:

Time-frequency position information of the uplink sounding signal, period information of the uplink sounding signal, and frequency point information of the uplink sounding signal.

In the above solution, the target base station selection judgment information includes:

The same-frequency measurement result of the neighboring base station, and the downlink transmit power of the neighboring base station.

The embodiment of the present invention also provides a method for selecting a base station, including:

When the source base station judges that the terminal channel quality exceeds the preset channel quality range,

sending, by the source base station, first indication information to the terminal, where the first indication information is used to instruct the terminal to send an uplink sounding signal on the same frequency;

Receive the same-frequency measurement result sent by the neighboring base station;

When the handover base station can be determined for the terminal based on the intra-frequency measurement result, the determined handover base station is used as the target base station of the terminal.

In the above solution, before the source base station determines that the terminal channel quality exceeds the preset channel quality range, the method further includes:

The source base station performs uplink measurement request broadcast or uplink measurement request multicast;

Receive the measurement interval configuration information sent by the neighbor base station in response to the uplink measurement request broadcast or the uplink measurement request multicast.

In the above solution, the determining of the handover base station for the terminal based on the intra-frequency measurement result includes:

The source base station determines, based on the intra-frequency measurement result, at least one intra-frequency handover base station that satisfies the first handover condition, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the intra-frequency measurement result that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs the same-frequency handover when the at least two intra-frequency handover base stations meet the second handover condition. A handover base station is determined among the frequency handover base stations.

In the above solution, when a base station handover cannot be determined for the terminal based on the same-frequency measurement result of the neighboring base station, the method further includes:

The source base station sends second indication information to the terminal, where the second indication information is used to instruct the terminal to send an inter-frequency uplink sounding signal;

receiving an inter-frequency measurement result sent by the neighboring base station; and determining an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and using the determined inter-frequency handover base station as a target base station of the terminal.

An embodiment of the present invention further provides a method for selecting a base station, including:

The neighbor base station receives the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the source base station;

The target base station selection judgment information is sent to the source base station.

In the above scheme, the method also includes:

Responding to an uplink measurement request broadcast or an uplink measurement request multicast sent by the source base station;

sending the measurement interval configuration information of the neighbor base station to the source base station;

Send the same-frequency measurement result to the source base station.

In the above solution, when the source base station fails to determine the handover base station for the terminal based on the target base station selection judgment information, the method further includes:

Send the inter-frequency measurement result to the source base station.

The embodiment of the present invention also provides a base station selection system, including:

a channel quality judgment module, a first information transceiver module, and a target base station selection module, wherein,

The channel quality judgment module is used to judge whether the terminal channel quality exceeds the preset channel quality range;

the first information transceiver module, configured to send the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the neighboring base station;

is also used to receive target base station selection judgment information sent by a neighboring base station supporting the frequency point;

The target base station selection module is configured to determine a handover base station for the terminal based on the target base station selection judgment information, and use the determined handover base station as the target base station of the terminal.

In the above solution, when the target base station selection judgment information fails to determine the handover base station for the terminal,

The first information transceiver module is further configured to: send the inter-frequency downlink reference signal information of the neighboring base station to the terminal, and receive the inter-frequency measurement result sent by the terminal;

The target base station selection module is further configured to: determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as a target base station of the terminal.

In the above solution, the target base station selection module is configured to determine the handover base station for the terminal based on the target base station selection judgment information, including:

The target base station selection module determines at least one intra-frequency handover base station that satisfies the first handover condition based on the target base station selection judgment information, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the target base station selection module determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations that satisfy the second handover condition. One of the two co-frequency handover base stations is determined.

In the above solution, the uplink sounding signal configuration information includes at least one of the following:

Time-frequency position information of the uplink sounding signal, period information of the uplink sounding signal, and frequency point information of the uplink sounding signal.

In the above solution, the target base station selection judgment information includes:

The same-frequency measurement result of the neighboring base station, and the downlink transmit power of the neighboring base station.

In the above solution, when the channel quality judgment module judges that the terminal channel quality exceeds the preset channel quality range,

The first information transceiver module is further configured to: send first indication information to the terminal, where the first indication information is used to instruct the terminal to send the same-frequency uplink sounding signal; and receive the same-frequency signal sent by the neighboring base station measurement results;

The target base station selection module is further configured to: determine a handover base station for the terminal based on the intra-frequency measurement result, and use the determined handover base station as a target base station of the terminal.

In the above scheme, the system also includes:

a broadcasting module; used for the channel quality judgment module to perform uplink measurement request broadcast or uplink measurement request multicast before the terminal channel quality exceeds the preset terminal channel quality range;

The first information transceiver module is further configured to: receive measurement interval configuration information sent by the neighbor base station in response to the uplink measurement request broadcast or the uplink measurement request multicast.

In the above solution, the target base station selection module determines, based on the intra-frequency measurement result, to switch the base station for the terminal, including:

The target base station selection module determines at least one intra-frequency handover base station that satisfies the first handover condition based on the intra-frequency measurement result, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the target base station selection module determines that there is no intra-frequency handover base station that satisfies the first handover condition based on the intra-frequency measurement result, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations when the at least two handover conditions are met. One handover base station is determined among the multiple intra-frequency handover base stations.

In the above solution, when the target base station selection module fails to determine the handover base station for the terminal based on the same-frequency measurement result of the neighboring base station,

The first information transceiver module is further configured to: send second indication information to the terminal, where the second indication information is used to instruct the terminal to send an inter-frequency uplink sounding signal, and receive an inter-frequency measurement result sent by the neighboring base station;

The target base station selection module is further configured to: determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as a target base station of the terminal.

An embodiment of the present invention additionally provides a base station selection system, including:

a second information transceiver module and a co-frequency measurement module;

The second information transceiver module is configured to receive the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the source base station, and send the target base station selection judgment information to the source base station;

The intra-frequency measurement module is configured to perform intra-frequency measurement according to the configuration information of the uplink sounding signal of the frequency point currently accessed by the terminal.

In the above scheme, the system also includes:

Broadcast response module, inter-frequency measurement module;

The broadcast response module is used to respond to the uplink measurement request broadcast or uplink measurement request multicast sent by the source base station;

The inter-frequency measurement module is used to perform inter-frequency measurement and obtain inter-frequency measurement results;

The second information transceiver module is also used for:

sending the measurement interval configuration information of the neighbor base station to the source base station;

Send the same-frequency measurement result to the source base station.

In the above solution, when it is not possible to determine the switching base station for the terminal based on the target base station selection judgment information, the second information transceiver module is further configured to:

Send the inter-frequency measurement result to the source base station.

An embodiment of the present invention further provides a base station selection system, wherein the system includes: a source base station, at least one neighboring base station, and a terminal, wherein,

When the source base station is used to judge that the terminal channel quality exceeds the preset channel quality range,

sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the neighboring base station;

receiving target base station selection judgment information sent by the neighbor base station supporting the frequency point;

When a handover base station can be determined for the terminal based on the target base station selection judgment information, the determined handover base station is used as the target base station of the terminal;

When it is not possible to determine a handover base station for the terminal based on the target base station selection judgment information,

The source base station is further configured to: send the inter-frequency downlink reference signal information of the neighbor base station to the terminal;

receiving an inter-frequency measurement result sent by the terminal, and determining an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and using the determined inter-frequency handover base station as a target base station of the terminal;

The neighbor base station is used for the source base station to judge that the terminal channel quality exceeds the preset channel quality range,

receiving the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the source base station;

sending the target base station selection judgment information to the source base station;

The terminal is used for when the source base station fails to determine the handover base station for the terminal based on the target base station selection judgment information,

receiving the inter-frequency downlink reference signal information of the neighbor base station sent by the source base station;

Send the inter-frequency measurement result to the source base station.

In the above solution, before the source base station judges that the terminal channel quality exceeds the preset terminal channel quality range,

The source base station is further configured to perform uplink measurement request broadcast or uplink measurement request multicast;

receiving measurement interval configuration information sent by the neighbor base station in response to the uplink measurement request broadcast or the uplink measurement request multicast;

Correspondingly, after the source base station determines that the terminal channel quality exceeds the preset channel quality range, the source base station is further used to:

sending an instruction to the terminal instructing the terminal to send an uplink sounding signal on the same frequency;

receiving an intra-frequency measurement result sent by the neighboring base station;

When the handover base station can be determined for the terminal based on the intra-frequency measurement result, the determined handover base station is used as the target base station of the terminal;

When the source base station fails to determine a handover base station for the terminal based on the target base station selection judgment information, the neighboring base station is further used for:

sending the inter-frequency measurement result to the source base station;

When the source base station fails to determine a handover base station for the terminal based on the target base station selection judgment information, the terminal is further configured to:

receiving an instruction to send an inter-frequency uplink sounding signal sent by the source base station;

The inter-frequency uplink detection signal is sent on the specified inter-frequency frequency point.

The base station selection method and system provided by the embodiments of the present invention include: when the source base station determines that the channel quality of the terminal exceeds the preset channel quality range, sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the neighboring base station; receiving Support the target base station selection judgment information sent by the neighbor base station of the frequency point; when the handover base station can be determined for the terminal based on the target base station selection judgment information, the determined handover base station is used as the target base station of the terminal.

The embodiment of the present invention can directly replace the downlink measurement of the terminal in the existing LTE system by the uplink measurement of the base station in the existing network, and then select the target base station that meets the requirements. The embodiment of the present invention does not need to limit the use environment, and the implementation is simple and convenient. The application range is wider, thereby ensuring that the power consumption of the terminal does not increase and the throughput does not decrease.

Description of drawings

1 is a schematic diagram of a measurement configuration of an LTE network measurement process in the prior art;

2 is a schematic diagram of a measurement report of an LTE network measurement process in the prior art;

FIG. 3 is a first optional schematic flowchart of a base station selection method in an embodiment of the present invention;

FIG. 4 is a second optional schematic flowchart of a base station selection method in an embodiment of the present invention;

FIG. 5 is a third optional schematic flowchart of a base station selection method in an embodiment of the present invention;

FIG. 6 is a fourth optional schematic flowchart of a base station selection method in an embodiment of the present invention;

FIG. 7 is a fifth optional schematic flowchart of a base station selection method in an embodiment of the present invention;

FIG. 8 is a sixth optional schematic flowchart of a base station selection method in an embodiment of the present invention;

9 is a schematic diagram of a first optional composition structure of a base station selection system in an embodiment of the present invention;

10 is a schematic diagram of a second optional composition structure of a base station selection system in an embodiment of the present invention;

11 is a schematic diagram of a third optional composition structure of a base station selection system in an embodiment of the present invention;

12 is a schematic diagram of the composition of a base station selection system according to an embodiment of the present invention;

FIG. 13 is a schematic diagram of a specific working process of a base station selection method in the embodiment of the present invention in FIG. 8 .

Detailed ways

In order to be able to understand the features and technical contents of the embodiments of the present invention in more detail, the implementation of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the present invention.

It should be noted that the term "first\second" involved in the embodiments of the present invention is only to distinguish similar objects, and does not represent a specific ordering of objects. It is understandable that "first\second" is allowed The specific order or sequence may be interchanged under circumstances. It should be understood that the "first\second" distinctions may be interchanged under appropriate circumstances to enable the embodiments of the invention described herein to be practiced in sequences other than those illustrated or described herein.

Before the present invention is further described in detail, the terms and terms involved in the embodiments of the present invention are described. The terms and terms involved in the embodiments of the present invention are applicable to the following explanations.

The source base station, the base station that is serving the terminal, when the source base station judges that the current channel quality of the terminal is poor, it needs to select a new base station as the serving base station for the terminal according to the corresponding information;

Neighboring base stations, the number of base stations that do not currently provide services to the terminal is at least one. When the source base station judges that the current channel quality of the terminal is poor, it will select a neighboring base station as the target base station for handover. the terminal to provide services;

The number of terminals is at least one. For some reasons (for example, the movement of the terminal exceeds the service range of the source base station), the current channel quality of the terminal is poor, and a new serving base station needs to be selected. The base station provides services for the terminal.

FIG. 3 is a first optional schematic flowchart of a method for selecting a base station according to an embodiment of the present invention. With the method shown in FIG. 3, it can be realized that when the terminal continuously sends out the same-frequency uplink sounding signal, the source base station is the The terminal selects an intra-frequency target base station that needs to be handed over. As shown in FIG. 3 , the first optional process of a base station selection method in the embodiment of the present invention includes:

Step 301: When the source base station determines that the terminal channel quality exceeds the preset channel quality range,

sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the neighboring base station;

Step 302: the neighbor base station receives the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the source base station;

Step 303: the neighbor base station sends the target base station selection judgment information to the source base station;

Step 304: the source base station receives the target base station selection judgment information sent by the neighbor base station supporting the frequency point;

Step 305: Determine a handover base station for the terminal based on the target base station selection judgment information, and use the determined handover base station as a target base station of the terminal.

In practical applications, when the base station selection method shown in FIG. 3 is adopted, the terminal continuously sends the same-frequency uplink sounding signal;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The uplink sounding signal configuration information includes at least one of the following:

Time-frequency position information of the uplink sounding signal, period information of the uplink sounding signal, and frequency point information of the uplink sounding signal.

The target base station selection judgment information includes:

The same-frequency measurement result of the neighboring base station, and the downlink transmit power of the neighboring base station.

The downlink transmit power of the neighbor base station includes one of the following:

the average power of each PRB (physical resource block, physical resource block) of the neighboring base station;

the maximum power of each PRB of the neighboring base station;

The total transmit power of the neighbor base station: .

The manner in which the source base station receives the target base station selection judgment information sent by the neighbor base station includes one of the following:

The source base station receives the target base station selection judgment information placed in the base station interface message by the neighbor base station; or,

The source base station receives the target base station selection judgment information placed by the neighbor base station in a dedicated signaling (container) of the radio resource configuration RRC.

The source base station determines the handover base station for the terminal based on the target base station selection judgment information, including:

The source base station determines at least one intra-frequency handover base station that satisfies the first handover condition based on the target base station selection judgment information, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the same-frequency handover base stations.

The first switching condition may be one of the following:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value; or,

Among the neighboring base stations that return the same-frequency measurement result, there are neighboring base stations whose downlink transmit power meets the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, the source base station may select a base station that meets the second handover condition for the terminal according to the target base station selection judgment information The target base station group of the handover condition, the target base station group includes at least two adjacent base stations, and the source base station can select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

With the method shown in FIG. 3 , when the source base station can determine a handover base station for the terminal based on the target base station selection judgment information, the source base station can select an intra-frequency target base station as the handover base station for the terminal.

FIG. 4 is a second optional flowchart of a base station selection method in an embodiment of the present invention. Through the method shown in FIG. 4 , the source base station can select an inter-frequency target base station for the terminal as the handover base station, as shown in FIG. 4 As shown, a second optional process of a base station selection method in this embodiment of the present invention includes the following steps:

Step 401: the source base station sends the inter-frequency downlink reference signal information of the neighboring base station to the terminal;

In practical applications, when the source base station receives the target base station selection judgment information, it can simultaneously receive the inter-frequency downlink reference signal information of the adjacent base station sent by the adjacent base station, if the source base station is receiving the target base station. When selecting the judgment information, if the inter-frequency downlink reference signal information of the adjacent base station sent by the adjacent base station cannot be received at the same time, the source base station needs to send the adjacent base station to obtain the inter-frequency downlink reference signal of the adjacent base station. request for signal information, and receive the inter-frequency downlink reference signal information of the neighbor base station sent by the neighbor base station.

Step 402: Receive inter-frequency downlink reference signal information of neighboring base stations sent by the source base station, and send the inter-frequency measurement result to the source base station;

Step 403: the neighboring base station sends the inter-frequency measurement result to the source base station;

Step 404: the source base station receives the inter-frequency measurement result sent by the terminal;

Step 405: Determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as a target base station of the terminal.

In actual use, when the base station selection method shown in FIG. 4 is adopted, the terminal continuously sends the same-frequency uplink sounding signal;

The source base station may not obtain the inter-frequency downlink reference signal configuration information of the neighbor base station, therefore, the source base station may send a request message to the neighbor base station to request the neighbor base station to send the inter-frequency downlink reference signal configuration information, and receive the inter-frequency downlink reference signal configuration information sent by the neighbor base station, and the source base station receives the inter-frequency downlink reference signal configuration information sent by the neighbor base station in one of the following ways:

The source base station receives the inter-frequency downlink reference signal configuration information placed in the base station interface message by the neighbor base station; or,

The source base station receives the inter-frequency downlink reference signal configuration information placed by the neighbor base station in the dedicated signaling container of the radio resource configuration RRC.

The source base station sends the inter-frequency downlink reference signal information of the neighboring base station to the terminal, which can trigger the terminal to perform downlink measurement;

The source base station determining the inter-frequency handover base station for the terminal based on the inter-frequency measurement result includes: the source base station can select a neighboring base station with the best inter-frequency measurement result as the target base station of the terminal.

Through the method shown in FIG. 4 , the source base station can select an inter-frequency target base station for the terminal as the handover base station.

FIG. 5 is a third optional schematic flowchart of a base station selection method according to an embodiment of the present invention. With the method shown in FIG. 5 , the source base station can select a co-frequency target base station as the handover base station for the terminal. The same-frequency target base station, the source base station can also select an inter-frequency target base station as a handover base station for the terminal. As shown in FIG. 5, a third optional process of a base station selection method in the embodiment of the invention includes the following steps:

Step 501: When the source base station determines that the terminal channel quality exceeds the preset channel quality range,

sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the neighboring base station;

Step 502: the neighbor base station receives the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the source base station;

Step 503: the neighbor base station sends the target base station selection judgment information to the source base station;

Step 504: the source base station receives the target base station selection judgment information sent by the neighbor base station supporting the frequency point;

Step 505: Determine a handover base station for the terminal based on the target base station selection judgment information, and use the determined handover base station as the target base station of the terminal;

Step 506: When the base station for handover cannot be determined for the terminal based on the target base station selection judgment information, the source base station sends the inter-frequency downlink reference signal information of the neighboring base station to the terminal;

Step 507: the terminal receives the inter-frequency downlink reference signal information of the neighbor base station sent by the source base station;

Send the inter-frequency measurement result to the source base station.

Step 508: the neighbor base station sends the inter-frequency measurement result to the source base station

Step 509: the source base station receives the inter-frequency measurement result sent by the terminal;

Step 510: Determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as a target base station of the terminal.

When the base station selection method shown in FIG. 5 is adopted, the terminal continuously sends the same-frequency uplink sounding signal;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The uplink sounding signal configuration information includes at least one of the following:

Time-frequency position information of the uplink sounding signal, period information of the uplink sounding signal, and frequency point information of the uplink sounding signal.

The target base station selection judgment information includes:

The same-frequency measurement result of the neighboring base station, and the downlink transmit power of the neighboring base station.

The downlink transmit power of the neighbor base station includes one of the following:

the average power of each PRB of the neighboring base station;

the maximum power of each PRB of the neighboring base station;

The total transmit power of the neighbor base station: .

The manner in which the source base station receives the target base station selection judgment information sent by the neighbor base station includes one of the following:

The source base station receives the target base station selection judgment information placed in the base station interface message by the neighbor base station; or,

The source base station receives the dedicated signaling container placed by the neighbor base station in the radio resource configuration RRC)

The target base station in the selection judgment information.

The source base station can determine the handover base station for the terminal based on the target base station selection judgment information, including:

The source base station determines at least one intra-frequency handover base station that satisfies the first handover condition based on the target base station selection judgment information, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the same-frequency handover base stations.

The first switching condition may be one of the following:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value; or,

Among the neighboring base stations that return the same-frequency measurement result, there are neighboring base stations whose downlink transmit power meets the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, the source base station may select a base station that meets the second handover condition for the terminal according to the target base station selection judgment information The target base station group of the handover condition, the target base station group includes at least two adjacent base stations, and the source base station can select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

Before performing step 506, the source base station may not obtain the inter-frequency downlink reference signal configuration information of the neighbor base station, therefore, the source base station may send a request message to the neighbor base station for requesting the neighbor base station to send Inter-frequency downlink reference signal configuration information, and receive inter-frequency downlink reference signal configuration information sent by the neighbor base station, and the source base station receives the inter-frequency downlink reference signal configuration information sent by the neighbor base station. The method includes one of the following:

The source base station receives the inter-frequency downlink reference signal configuration information placed in the base station interface message by the neighbor base station; or,

The source base station receives the inter-frequency downlink reference signal configuration information placed by the neighbor base station in the dedicated signaling container of the radio resource configuration RRC.

The source base station sends the inter-frequency downlink reference signal information of the neighboring base station to the terminal, which can trigger the terminal to perform downlink measurement;

The source base station determining the inter-frequency handover base station for the terminal based on the inter-frequency measurement result includes: the source base station can select a neighboring base station with the best inter-frequency measurement result as the target base station of the terminal.

With the method shown in FIG. 5 , the source base station can select a co-frequency target base station as the handover base station for the terminal when the channel quality exceeds the preset channel quality range, and when the co-frequency target base station cannot be selected, the The shown method can also select one inter-frequency target base station as the handover base station for the terminal.

FIG. 6 is a fourth optional schematic flowchart of a base station selection method according to an embodiment of the present invention. With the method shown in FIG. 6 , uplink measurements can be always performed at neighboring base stations, but the terminal does not always transmit the same-frequency uplink sounding signal When the source base station selects an intra-frequency target base station for the terminal as the handover base station, as shown in FIG. 6 , a fourth optional process of a base station selection method in the embodiment of the present invention includes the following steps:

Step 601: the source base station performs uplink measurement request broadcast or uplink measurement request multicast;

Step 602: the neighbor base station responds to the uplink measurement request broadcast or the uplink measurement request multicast sent by the source base station;

Step 603: the neighbor base station sends the measurement interval configuration information of the neighbor base station to the source base station;

Step 604: the source base station receives the measurement interval configuration information sent by the neighbor base station in response to the uplink measurement request broadcast or the uplink measurement request multicast;

Step 605: when the source base station judges that the terminal channel quality exceeds the preset channel quality range, it sends an instruction to the terminal instructing the terminal to send the same-frequency uplink sounding signal;

Step 606: the terminal receives the instruction sent by the source base station to the terminal instructing the terminal to send the same-frequency uplink sounding signal, and sends the uplink sounding signal on the currently accessed frequency;

Step 607: the source base station receives the intra-frequency measurement result sent by the neighbor base station;

Step 608: Determine a handover base station for the terminal based on the intra-frequency measurement result, and use the determined handover base station as a target base station of the terminal.

In practical applications, when the base station selection method shown in FIG. 6 is adopted, the terminal will not continuously send the same-frequency uplink sounding signal, but the adjacent base station is in a state of continuous uplink measurement;

The measurement interval configuration information includes at least one of the following:

Measurement interval duration information, period information, start time offset information;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the intensity changes of the uplink sounding signal of the currently accessed frequency point.

The source base station determines the handover base station for the terminal based on the intra-frequency measurement, including:

The source base station determines, based on the intra-frequency measurement, at least one intra-frequency handover base station that satisfies the first handover condition, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the intra-frequency measurement that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs the same-frequency handover at the at least two intra-frequency handover base stations. One of the handover base stations is determined.

The first switching condition may be:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the source base station determines based on the intra-frequency measurement that there is no intra-frequency handover base station that meets the first handover condition, the source base station may select a target that meets the second handover condition for the terminal according to the intra-frequency measurement A base station group, the target base station group includes at least two adjacent base stations, and the source base station can select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

The uplink sounding signal of the current frequency point sent by the terminal may carry the ID of the terminal and the ID information of the cell where the terminal is currently located, so that the neighboring base station can know which terminal in which cell the measured uplink sounding signal comes from.

In step 605, when the source base station judges that the terminal channel quality exceeds the preset channel quality range, it sends an instruction to the terminal instructing the terminal to send the same-frequency uplink sounding signal. The terminal sends an uplink sounding signal on the current frequency.

With the method shown in FIG. 6 , the source base station does not continuously send the same-frequency uplink sounding signal to the terminal, but the adjacent base station is in the state of continuous uplink measurement, and can select a same-frequency target base station for the terminal as the Switch base stations.

FIG. 7 is a fifth optional flowchart of a base station selection method according to an embodiment of the present invention. With the method shown in FIG. 7 , the source base station does not continuously send the same-frequency uplink sounding signal at the terminal, but the adjacent base station In the state of uninterrupted uplink measurement, an inter-frequency target base station may be selected as the handover base station for the terminal. As shown in FIG. 7 , the fifth optional process of a base station selection method in the embodiment of the present invention includes the following step:

Step 701: The source base station sends an instruction to the terminal instructing the terminal to send an inter-frequency uplink sounding signal;

Step 702: the terminal receives the instruction sent by the source base station to send the inter-frequency uplink detection signal, and sends the inter-frequency uplink detection signal at the specified inter-frequency point;

Step 703: the neighboring base station sends the inter-frequency measurement result to the source base station;

Step 704: the source base station receives the inter-frequency measurement result sent by the neighbor base station;

Step 705: The source base station determines an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and uses the determined inter-frequency handover base station as a target base station of the terminal.

In practical applications, when the base station selection method shown in FIG. 7 is used, the terminal will not continuously send the same-frequency uplink sounding signal, but the adjacent base station is in a state of continuous uplink measurement;

When the base station selection method shown in FIG. 7 is adopted, the sending of the inter-frequency uplink sounding signal by the terminal includes one of the following situations:

The source base station cannot select an intra-frequency base station that meets the first handover condition or the second handover condition, and the source base station instructs the terminal to send the uplink sounding signal at different frequencies through the radio resource configuration RRC dedicated signaling container;

If the terminal does not receive the handover command from the source base station within a predetermined period of time T1, it sends an uplink sounding signal at different frequencies after T1 times out. The predetermined time T1 is pre-configured by the source base station through radio resources to configure the configuration in the RRC dedicated signaling container to the terminal;

The inter-frequency frequency point may be pre-configured by the source base station to the terminal through RRC dedicated signaling, or it may be determined by the source base station based on the same-frequency measurement result fed back by the neighboring base station, and configured with RRC through radio resources. The configuration in the dedicated signaling container is for the terminal.

The instruction sent by the source base station to the terminal instructing the terminal to send the inter-frequency uplink sounding signal includes inter-frequency frequency point information that the terminal needs to send the inter-frequency uplink sounding signal.

With the method shown in FIG. 7 , the source base station does not continuously send the same-frequency uplink sounding signal to the terminal, but the adjacent base station is in the state of continuous uplink measurement, and can select an inter-frequency target base station for the terminal as the Switch base stations.

FIG. 8 is a sixth optional schematic flowchart of a base station selection method according to an embodiment of the present invention. With the method shown in FIG. 8 , the source base station can select a co-frequency target base station for the terminal as the handover base station. The same-frequency target base station, the source base station can also select an inter-frequency target base station as the handover base station for the terminal. As shown in FIG. 8 , the sixth optional process of the base station selection method in the embodiment of the invention includes the following steps:

Step 801: the source base station performs uplink measurement request broadcast or uplink measurement request multicast;

Step 802: the neighbor base station responds to the uplink measurement request broadcast or the uplink measurement request multicast sent by the source base station;

Step 803: the neighbor base station sends the measurement interval configuration information of the neighbor base station to the source base station;

Step 804: the source base station receives the measurement interval configuration information sent by the neighbor base station in response to the uplink measurement request broadcast or the uplink measurement request multicast;

Step 805: when the source base station judges that the terminal channel quality exceeds the preset channel quality range, it sends an instruction to the terminal instructing the terminal to send the same-frequency uplink sounding signal;

Step 806: the terminal receives the instruction sent by the source base station to the terminal instructing the terminal to send the same-frequency uplink sounding signal, and sends the uplink sounding signal on the currently accessed frequency;

Step 807: the source base station receives the intra-frequency measurement result sent by the neighbor base station;

Step 808: the source base station determines a handover base station for the terminal based on the intra-frequency measurement result, and uses the determined handover base station as the target base station of the terminal;

Step 809: when the source base station fails to determine a base station handover for the terminal based on the intra-frequency measurement result,

sending, by the source base station, an instruction to the terminal instructing the terminal to send an inter-frequency uplink sounding signal;

Step 810: the terminal receives the instruction sent by the source base station to send the inter-frequency uplink sounding signal, and sends the inter-frequency uplink sounding signal at the designated inter-frequency point;

Step 811: the neighboring base station sends the inter-frequency measurement result to the source base station;

Step 812: the source base station receives the inter-frequency measurement result sent by the neighbor base station;

Step 813: The source base station determines an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and uses the determined inter-frequency handover base station as a target base station of the terminal.

In practical applications, when the base station selection method shown in FIG. 8 is used, the terminal will not continuously send the same-frequency uplink sounding signal, but the adjacent base station is in a state of continuous uplink measurement;

The measurement interval configuration information includes at least one of the following:

Measurement interval duration information, period information, start time offset information;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The source base station determines the handover base station for the terminal based on the intra-frequency measurement, including:

The source base station determines, based on the intra-frequency measurement, at least one intra-frequency handover base station that satisfies the first handover condition, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the intra-frequency measurement that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs the same-frequency handover at the at least two intra-frequency handover base stations. One of the handover base stations is determined.

The first switching condition may be:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the source base station determines based on the intra-frequency measurement that there is no intra-frequency handover base station that meets the first handover condition, the source base station may select a target that meets the second handover condition for the terminal according to the intra-frequency measurement A base station group, the target base station group includes at least two adjacent base stations, and the source base station can select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

The uplink sounding signal of the current frequency point sent by the terminal may carry the ID of the terminal and the ID information of the cell where the terminal is currently located, so that the neighboring base station can know which terminal in which cell the measured uplink sounding signal comes from.

In step 805, when the source base station determines that the terminal channel quality exceeds the preset channel quality range, it sends an instruction to the terminal instructing the terminal to send the same-frequency uplink sounding signal, which can indicate that the terminal is on the current frequency point through RRC dedicated signaling. Send an uplink sounding signal.

The source base station cannot select an intra-frequency base station that meets the first handover condition or the second handover condition, and the source base station instructs the terminal to send uplink sounding signals at different frequencies through RRC dedicated signaling;

If the terminal does not receive the handover command from the source base station within a predetermined period of time T1, it sends an uplink sounding signal at different frequencies after T1 times out. The predetermined time T1 is pre-configured by the source base station to the terminal through RRC dedicated signaling;

The inter-frequency frequency point may be pre-configured by the source base station to the terminal through RRC dedicated signaling, or it may be determined by the source base station based on the same-frequency measurement result fed back by the neighboring base station, and configured through RRC dedicated signaling. configured for the terminal.

The instruction sent by the source base station to the terminal instructing the terminal to send the inter-frequency uplink sounding signal includes inter-frequency frequency point information that the terminal needs to send the inter-frequency uplink sounding signal.

With the method shown in FIG. 8 , the source base station does not continuously send the same-frequency uplink sounding signal to the terminal, but the adjacent base station is in the state of continuous uplink measurement, and can select a same-frequency target base station or a target base station for the terminal. An inter-frequency target base station is used as a handover base station.

FIG. 9 is a schematic diagram of the first optional structure of the base station selection system in the embodiment of the present invention. Through the system shown in FIG. 9, the source base station can select the same-frequency target base station to be handed over, as shown in FIG. 9, The first optional composition structure of the base station selection system in the embodiment of the present invention includes:

A channel quality judgment module 901, a first information transceiver module 902, a target base station selection module 903, a second information transceiver module 904, and an intra-frequency measurement module 905; wherein the channel quality judgment module 901, the first information transceiver module 902 . The target base station selection module 903 may form a source base station; the second information transceiver module 904 and the intra-frequency measurement module 905 may form a neighboring base station.

As shown in FIG. 9 , the first optional composition structure of the base station selection system in the embodiment of the present invention, when executing the first optional schematic flowchart of the base station selection method shown in FIG. 3 ,

The channel quality judgment module 901 is used to judge whether the terminal channel quality exceeds the preset channel quality range

The first information transceiver module 902 is configured to send the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the second transceiver module 904;

is further configured to receive target base station selection judgment information sent by the second transceiver module 904 of the adjacent base station supporting the frequency point;

The target base station selection module 903 is configured to determine a handover base station for the terminal based on the target base station selection judgment information, and use the determined handover base station as the target base station of the terminal;

The second information transceiving module 904 is configured to receive the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the first information transceiving module 902, and send the target base station selection judgment information to the first information transmission and reception module 902. The information transceiver module 902 sends;

The intra-frequency measurement module 905 is configured to perform intra-frequency measurement according to the configuration information of the uplink sounding signal of the frequency point currently accessed by the terminal.

In a practical application, as shown in FIG. 9 , the first optional composition structure of the base station selection system in the embodiment of the present invention, when executing the first optional schematic flowchart of the base station selection method shown in FIG. 3 , The terminal continuously sends the same-frequency uplink detection signal;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The uplink sounding signal configuration information includes at least one of the following:

Time-frequency position information of the uplink sounding signal, period information of the uplink sounding signal, and frequency point information of the uplink sounding signal.

The target base station selection judgment information includes:

The same-frequency measurement result of the neighboring base station, and the downlink transmit power of the neighboring base station.

The downlink transmit power of the neighbor base station includes one of the following:

the average power of each PRB of the neighboring base station;

the maximum power of each PRB of the neighboring base station;

The total transmit power of the neighbor base station: .

The manner in which the first information transceiver module 902 receives the target base station selection judgment information sent by the second information transceiver module 904 includes one of the following:

The first information transceiver module 902 receives the target base station selection judgment information placed in the base station interface message by the second information transceiver module 904; or,

The first information transceiving module 902 receives the target base station selection judgment information that the second information transceiving module 904 places in the dedicated signaling container of the radio resource configuration RRC.

The source base station determines the handover base station for the terminal based on the target base station selection judgment information, including:

The target base station selection module 903 determines at least one intra-frequency handover base station that satisfies the first handover condition based on the target base station selection judgment information, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the same-frequency handover base stations.

The first switching condition may be one of the following:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value; or,

Among the neighboring base stations that return the same-frequency measurement result, there are neighboring base stations whose downlink transmit power meets the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, the source base station may select a base station that meets the second handover condition for the terminal according to the target base station selection judgment information The target base station group of the handover condition, the target base station group includes at least two adjacent base stations, and the source base station can select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

As shown in FIG. 9, the first optional composition structure of the base station selection system in the embodiment of the present invention, when the first optional schematic flowchart of the base station selection method shown in FIG. 3 is executed, in the terminal In the state of continuously sending the same-frequency uplink sounding signal, the source base station can select an intra-frequency target base station as the handover base station for the terminal based on the target base station selection judgment information.

FIG. 10 is a schematic diagram of a second optional composition structure of a base station selection system according to an embodiment of the present invention. By executing the method shown in FIG. 4 in the system shown in FIG. 10 , the source base station can select the needs for the terminal. An inter-frequency target base station that performs handover, as shown in FIG. 10 , the second optional composition structure of the base station selection system in the embodiment of the present invention includes:

Channel quality judgment module 1001, first information transceiver module 1002, target base station selection module 1003, second information transceiver module 1004, intra-frequency measurement module 1005, third information transceiver module 1006, downlink measurement module 1007, wherein the channel quality The judgment module 1001, the first information transceiver module 1002, and the target base station selection module 1003 can form a source base station; the second information transceiver module 1004 and the intra-frequency measurement module 1005 can form a neighboring base station; the third The information transceiver module 1006 and the downlink measurement module 1007 can form a terminal;

As shown in FIG. 10 , in the second optional composition structure of the base station selection system in the embodiment of the present invention, when the second optional schematic flowchart of the base station selection method shown in FIG. 4 is executed,

The first information transceiver module 1002 is configured to send the inter-frequency downlink reference signal information of the neighboring base station to the third information transceiver module 1006,

is also used to receive the inter-frequency measurement result sent by the third information transceiver module 1006;

The third information transceiver module 1006 is configured to receive the inter-frequency downlink reference signal information of the neighboring base station sent by the first information transceiver module 1002,

is further configured to send the inter-frequency measurement result of the downlink measurement module 1007 to the first information transceiver module 1002;

The downlink measurement module 1007 is used for the terminal to perform downlink measurement to obtain an inter-frequency measurement result;

The target base station selection module 1003 is configured to determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as a target base station of the terminal.

In actual use, when the second optional composition structure of the base station selection system in the embodiment of the present invention shown in FIG. 10 executes the base station selection method shown in FIG. 4 , the terminal continuously sends the same-frequency uplink sounding signal;

The source base station may not obtain the inter-frequency downlink reference signal configuration information of the neighboring base station, therefore, the first information transceiver module 1002 may send a request message to the second information transceiver module 1004 to request the The neighboring base station sends the inter-frequency downlink reference signal configuration information, and receives the inter-frequency downlink reference signal configuration information sent by the second information transceiver module 1004, and the first information transceiver module 1002 receives the inter-frequency downlink reference signal sent by the neighboring base station. Signal configuration information includes one of the following:

The first information transceiver module 1002 receives the inter-frequency downlink reference signal configuration information placed in the base station interface message by the neighboring base station; or,

The first information transceiver module 1002 receives the inter-frequency downlink reference signal configuration information placed in the dedicated signaling container of the radio resource configuration RRC by the neighboring base station.

The first information transceiver module 1002 sends the inter-frequency downlink reference signal information of the neighboring base station to the third information transceiver module 1006, which can trigger the downlink measurement module 1007 to perform downlink measurement;

The target base station selection module 1003 determines an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, including: the target base station selection module 1003 can select the neighbor base station with the best inter-frequency measurement result as the target base station of the terminal. .

As shown in FIG. 10 , the second optional structure of the base station selection system in the embodiment of the present invention is by executing the method shown in FIG. 4 , the source base station can select an inter-frequency target base station as the handover base station for the terminal.

FIG. 10 is a schematic diagram of a second optional composition structure of a base station selection system according to an embodiment of the present invention. By executing the method shown in FIG. 5 in the system shown in FIG. 10 , the source base station can select needs for the terminal. An intra-frequency target base station that performs handover, or an inter-frequency target base station that needs to be handed over is selected for the terminal. As shown in FIG. 10 , the second optional composition structure of the base station selection system in the embodiment of the present invention includes: :

Channel quality judgment module 1001, first information transceiver module 1002, target base station selection module 1003, second information transceiver module 1004, intra-frequency measurement module 1005, third information transceiver module 1006, downlink measurement module 1007, wherein the channel quality The judgment module 1001, the first information transceiver module 1002, and the target base station selection module 1003 can form a source base station; the second information transceiver module 1004 and the intra-frequency measurement module 1005 can form a neighboring base station; the third The information transceiver module 1006 and the downlink measurement module 1007 can form a terminal;

As shown in FIG. 10 , in the second optional composition structure of the base station selection system in the embodiment of the present invention, when the third optional schematic flowchart of the base station selection method shown in FIG. 5 is executed,

The channel quality judgment module 1001 is used to judge whether the terminal channel quality exceeds the preset channel quality range

The first information transceiver module 1002 is configured to perform one of the following functions:

sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal to the second transceiver module 1004;

receiving target base station selection judgment information sent by the second transceiver module 1004 of the neighboring base station supporting the frequency point;

sending the inter-frequency downlink reference signal information of the neighboring base station to the third information transceiver module 1006,

receiving the inter-frequency measurement result sent by the third information transceiver module 1006;

The target base station selection module 1003 is configured to determine a handover base station for the terminal based on the target base station selection judgment information, and use the determined handover base station as the target base station of the terminal;

is also used for determining an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and using the determined inter-frequency handover base station as a target base station of the terminal;

The second information sending and receiving module 1004 is configured to receive the uplink sounding signal configuration information of the frequency point currently accessed by the terminal sent by the first information sending and receiving module 1002, and send the target base station selection judgment information to the first information sending and receiving module 1002. The information transceiver module 1002 sends;

The intra-frequency measurement module 1005 is configured to perform intra-frequency measurement according to the configuration information of the uplink sounding signal of the frequency point currently accessed by the terminal;

The third information transceiver module 1006 is configured to receive the inter-frequency downlink reference signal information of the neighboring base station sent by the first information transceiver module 1002,

is further configured to send the inter-frequency measurement result of the downlink measurement module 1007 to the first information transceiver module 1002;

The downlink measurement module 1007 is used for the terminal to perform downlink measurement to obtain an inter-frequency measurement result.

In practical applications, as shown in FIG. 10 , the second optional composition structure of the base station selection system in the embodiment of the present invention, when executing the third optional schematic flowchart of the base station selection method shown in FIG. 5 , The terminal continuously sends the same-frequency uplink detection signal;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The uplink sounding signal configuration information includes at least one of the following:

Time-frequency position information of the uplink sounding signal, period information of the uplink sounding signal, and frequency point information of the uplink sounding signal.

The target base station selection judgment information includes:

The same-frequency measurement result of the neighboring base station, and the downlink transmit power of the neighboring base station.

The downlink transmit power of the neighbor base station includes one of the following:

the average power of each PRB of the neighboring base station;

the maximum power of each PRB of the neighboring base station;

The total transmit power of the neighbor base station: .

The manner in which the first information transceiver module 1002 receives the target base station selection judgment information sent by the second information transceiver module 1004 includes one of the following:

The first information transceiver module 1002 receives the target base station selection judgment information placed in the base station interface message by the second information transceiver module 1004; or,

The first information transceiving module 1002 receives the target base station selection judgment information that the second information transceiving module 1004 places in the dedicated signaling container of the radio resource configuration RRC.

The source base station determines the handover base station for the terminal based on the target base station selection judgment information, including:

The target base station selection module 1003 determines at least one intra-frequency handover base station that satisfies the first handover condition based on the target base station selection judgment information, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and performs at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the same-frequency handover base stations.

The first switching condition may be one of the following:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value; or,

Among the neighboring base stations that return the same-frequency measurement result, there are neighboring base stations whose downlink transmit power meets the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the source base station determines based on the target base station selection judgment information that there is no intra-frequency handover base station that satisfies the first handover condition, the source base station may select a base station that meets the second handover condition for the terminal according to the target base station selection judgment information The target base station group of the handover condition, the target base station group includes at least two adjacent base stations, and the source base station can select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

The source base station may not obtain the inter-frequency downlink reference signal configuration information of the neighboring base station, therefore, the first information transceiver module 1002 may send a request message to the second information transceiver module 1004 to request the The neighboring base station sends the inter-frequency downlink reference signal configuration information, and receives the inter-frequency downlink reference signal configuration information sent by the second information transceiver module 1004, and the first information transceiver module 1002 receives the inter-frequency downlink reference signal sent by the neighboring base station. Signal configuration information includes one of the following:

The first information transceiver module 1002 receives the inter-frequency downlink reference signal configuration information placed in the base station interface message by the neighboring base station; or,

The first information transceiver module 1002 receives the inter-frequency downlink reference signal configuration information placed in the dedicated signaling container of the radio resource configuration RRC by the neighboring base station.

The first information transceiver module 1002 sends the inter-frequency downlink reference signal information of the neighboring base station to the third information transceiver module 1006, which can trigger the downlink measurement module 1007 to perform downlink measurement;

The target base station selection module 1003 determines an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, including: the target base station selection module 1003 can select the neighbor base station with the best inter-frequency measurement result as the target base station of the terminal. .

As shown in FIG. 10, the second optional composition structure of the base station selection system in the embodiment of the present invention, when the third optional schematic flowchart of the base station selection method shown in FIG. 5 is executed, in the terminal In the state of continuously sending intra-frequency uplink sounding signals, the source base station can select an intra-frequency target base station as a handover base station for the terminal based on the target base station selection judgment information, and can also be based on the inter-frequency measurement result, An inter-frequency target base station is selected as the handover base station for the terminal.

FIG. 11 is a schematic diagram of a third optional composition structure of a base station selection system according to an embodiment of the present invention. By executing the method shown in FIG. 6 in the system shown in FIG. 11 , the source base station can select the needs for the terminal. A co-frequency target base station that performs handover, as shown in FIG. 11 , the third optional composition structure of the base station selection system in the embodiment of the present invention includes:

Broadcast module 1101, channel quality judgment module 1102, first information transceiver module 1103, target base station selection module 1104, broadcast response module 1105, second information transceiver module 1106, intra-frequency measurement module 1107, inter-frequency measurement module 1111, third information A transceiver module 1108, a downlink measurement module 1109, and an uplink detection module 1110, wherein the broadcast module 1101, the channel quality judgment module 1102, the first information transceiver module 1103, and the target base station selection module 1104 can form a source base station ; The broadcast response module 1105, the second information transceiver module 1106, the intra-frequency measurement module 1107, and the inter-frequency measurement module 1111 can form adjacent base stations; the third information transceiver module 1108, the downlink measurement Module 1109, the uplink detection module 1110 may form a terminal;

As shown in FIG. 11 , in the third optional composition structure of the base station selection system in the embodiment of the present invention, when the fourth optional process of the base station selection method shown in FIG. 6 is executed,

The broadcasting module 1101 is configured to send an uplink measurement request broadcast or an uplink measurement request multicast;

The channel quality judgment module 1102 is configured to judge whether the terminal channel quality exceeds a preset channel quality range;

The first information transceiver module 1103 is configured to perform one of the following operations:

receiving the measurement interval configuration information sent by the second information transceiver module 1106 of the neighbor base station responding to the uplink measurement request broadcast or the uplink measurement request multicast;

sending an instruction to the third information transceiver module 1108 to instruct the uplink detection module 1110 to send an uplink detection signal on the same frequency;

receiving the same-frequency measurement result sent by the second information transceiver module 1106;

The target base station selection module 1104 is configured to determine a handover base station for the terminal based on the intra-frequency measurement result, and use the determined handover base station as the target base station of the terminal;

The broadcast response module 1105 is configured to respond to the uplink measurement request broadcast or the uplink measurement request multicast sent by the broadcast module 1101;

The second information transceiver module 1106 is configured to send the measurement interval configuration information of the neighboring base station to the first information transceiver module 1103;

It is also used to send the same-frequency measurement result to the first information transceiver module 1103;

The intra-frequency measurement module 1107 is used for the adjacent base station to perform intra-frequency measurement to obtain intra-frequency measurement results;

The third information transceiver module 1108 is configured to receive an instruction sent by the first information transceiver module 1103 to the terminal indicating that the uplink detection module 1110 sends an uplink detection signal on the same frequency;

The uplink detection module 1110 is used for the terminal to send an uplink detection signal on the current frequency.

In practical applications, in the third optional structure of the base station selection system in the embodiment of the present invention, when the fourth optional process of the base station selection method shown in FIG. 6 is executed, the uplink detection module 1110 will not The same-frequency uplink detection signal is intermittently sent, but the same-frequency measurement module 1107 is in a state of continuous uplink measurement;

The measurement interval configuration information includes at least one of the following:

Measurement interval duration information, period information, start time offset information;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The target base station selection module 1104 determines a handover base station for the terminal based on the intra-frequency measurement, including:

The target base station selection module 1104 determines at least one intra-frequency handover base station that satisfies the first handover condition based on the intra-frequency measurement, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the target base station selection module 1104 determines based on the intra-frequency measurement that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and executes at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the multiple intra-frequency handover base stations.

The first switching condition may be:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the target base station selection module 1104 determines based on the intra-frequency measurement that there is no intra-frequency handover base station that satisfies the first handover condition, the target base station selection module 1104 may select a suitable base station for the terminal according to the intra-frequency measurement The target base station group of the second handover condition, the target base station group includes at least two adjacent base stations, and the target base station selection module 1104 may select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

The uplink sounding signal of the current frequency point sent by the uplink sounding module 1110 may carry the ID of the terminal and the ID information of the cell where the terminal is currently located, so that the neighbor base station can know which terminal in which cell the measured uplink sounding signal comes from.

When the channel quality judging module 1102 judges that the terminal channel quality exceeds the preset channel quality range, it sends an instruction to the third information transceiver module 1108 to instruct the uplink detection module 1110 to send an uplink detection signal on the same frequency. The signaling instructs the uplink sounding module 1110 to send an uplink sounding signal on the current frequency.

In the third optional structure of the base station selection system in the embodiment of the present invention, when the fourth optional process of the base station selection method shown in FIG. 6 is executed, the source base station will not be uninterrupted in the terminal The same-frequency uplink sounding signal is sent, but the neighboring base station is in a state of continuous uplink measurement, and a target base station of the same frequency may be selected as the handover base station for the terminal.

FIG. 11 is a schematic diagram of a third optional structure of a base station selection system according to an embodiment of the present invention. By executing the method shown in FIG. 7 in the system shown in FIG. 11 , the source base station can select the needs for the terminal. An inter-frequency target base station that performs handover, as shown in FIG. 11 , the third optional composition structure of the base station selection system in the embodiment of the present invention includes:

Broadcast module 1101, channel quality judgment module 1102, first information transceiver module 1103, target base station selection module 1104, broadcast response module 1105, second information transceiver module 1106, intra-frequency measurement module 1107, inter-frequency measurement module 1111, third information A transceiver module 1108, a downlink measurement module 1109, and an uplink detection module 1110, wherein the broadcast module 1101, the channel quality judgment module 1102, the first information transceiver module 1103, and the target base station selection module 1104 can form a source base station ; The broadcast response module 1105, the second information transceiver module 1106, the intra-frequency measurement module 110, and the inter-frequency measurement module 1111 may form adjacent base stations; the third information transceiver module 1108, the downlink measurement module 1109 , the uplink detection module 1110 can form a terminal;

As shown in FIG. 11 , in the third optional composition structure of the base station selection system in the embodiment of the present invention, when the fifth optional process of the base station selection method shown in FIG. 7 is executed,

The first information transceiver module 1103 is configured to send an instruction to the second information transceiver module 1106 to instruct the terminal to send an inter-frequency uplink sounding signal;

The target base station selection module 1104 is configured to determine an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and use the determined inter-frequency handover base station as the target base station of the terminal;

the second information transceiver module 1106, configured to send the inter-frequency measurement result to the source base station;

The third information transceiver module 1108 is configured to receive an instruction sent by the first information transceiver module 1103 to send out an inter-frequency uplink sounding signal;

The uplink detection module 1110 is configured to send an inter-frequency uplink detection signal at a specified inter-frequency point;

The inter-frequency measurement module 1111 is configured to perform inter-frequency measurement to obtain inter-frequency measurement results.

In practical applications, in the third optional structure of the base station selection system in the embodiment of the present invention, when the fourth optional process of the base station selection method shown in FIG. 7 is executed, the uplink detection module 1110 does not The same-frequency uplink detection signal will be sent uninterruptedly, but the neighboring base station is in the state of uninterrupted uplink measurement;

Specifically, the uplink detection module 1110 sending the inter-frequency uplink detection signal at the specified inter-frequency point includes one of the following situations:

The source base station cannot select an intra-frequency base station that meets the first handover condition or the second handover condition, and the source base station instructs the terminal to send uplink sounding signals at different frequencies through RRC dedicated signaling;

The third information transceiver module 1108 does not receive a handover command from the source base station within a predetermined period of time T1, and the uplink detection module 1110 sends an uplink detection signal at the designated inter-frequency frequency point after T1 times out; the predetermined time T1 is pre-configured by the source base station to the terminal through RRC dedicated signaling;

The inter-frequency frequency point may be pre-configured by the source base station to the terminal through RRC dedicated signaling, or it may be determined by the source base station based on the same-frequency measurement result fed back by the neighboring base station, and configured through RRC dedicated signaling. configured for the terminal.

The third information transceiving module 1108 receives the instruction to send the inter-frequency uplink sounding signal sent by the first information transmitting and receiving module 1103, and includes inter-frequency frequency point information required by the terminal to send the inter-frequency uplink sounding signal.

In the third optional structure of the base station selection system in the embodiment of the present invention, when the fifth optional process of the base station selection method shown in FIG. 7 is executed, the source base station will not be uninterrupted in the terminal. When the same-frequency uplink sounding signal is sent, but the neighboring base station is in a state of continuous uplink measurement, an inter-frequency target base station can be selected as the handover base station for the terminal.

FIG. 11 is a schematic diagram of a third optional composition structure of a base station selection system according to an embodiment of the present invention. By executing the method shown in FIG. 8 in the system shown in FIG. 11 , the source base station can select needs for the terminal. An intra-frequency target base station that performs handover can also be implemented to select an inter-frequency target base station that needs to be handed over for the terminal. As shown in FIG. 11 , the third optional composition structure of the base station selection system in the embodiment of the present invention include:

Broadcast module 1101, channel quality judgment module 1102, first information transceiver module 1103, target base station selection module 1104, broadcast response module 1105, second information transceiver module 1106, intra-frequency measurement module 1107, inter-frequency measurement module 1111, third information A transceiver module 1108, a downlink measurement module 1109, and an uplink detection module 1110, wherein the broadcast module 1101, the channel quality judgment module 1102, the first information transceiver module 1103, and the target base station selection module 1104 can form a source base station ; The broadcast response module 1105, the second information transceiver module 1106, the intra-frequency measurement module 110, and the inter-frequency measurement module 1111 may form adjacent base stations; the third information transceiver module 1108, the downlink measurement module 1109 , the uplink detection module 1110 can form a terminal;

As shown in FIG. 11 , in the third optional structure of the base station selection system in the embodiment of the present invention, when the sixth optional process of the base station selection method shown in FIG. 8 is executed,

The broadcasting module 1101 is configured to send an uplink measurement request broadcast or an uplink measurement request multicast;

The channel quality judgment module 1102 is configured to judge whether the terminal channel quality exceeds a preset channel quality range;

The first information transceiver module 1103 is configured to perform one of the following operations:

receiving the measurement interval configuration information sent by the second information transceiver module 1106 of the neighbor base station responding to the uplink measurement request broadcast or the uplink measurement request multicast;

sending an instruction to the third information transceiver module 1108 to instruct the uplink detection module 1110 to send an uplink detection signal on the same frequency;

receiving the same-frequency measurement result sent by the second information transceiver module 1106;

sending an instruction instructing the terminal to send an inter-frequency uplink sounding signal to the second information transceiver module 1106;

The target base station selection module 1104 is configured to determine a handover base station for the terminal based on the intra-frequency measurement result, and use the determined handover base station as the target base station of the terminal;

is also used for determining an inter-frequency handover base station for the terminal based on the inter-frequency measurement result, and using the determined inter-frequency handover base station as a target base station of the terminal;

The broadcast response module 1105 is configured to respond to the uplink measurement request broadcast or the uplink measurement request multicast sent by the broadcast module 1101;

The second information transceiver module 1106 is configured to perform one of the following operations:

sending the measurement interval configuration information of the neighbor base station to the first information transceiver module 1103;

the same-frequency measurement result sent to the first information transceiver module 1103;

Send the inter-frequency measurement result to the source base station

The intra-frequency measurement module 1107 is used for the adjacent base station to perform intra-frequency measurement to obtain intra-frequency measurement results;

The third information transceiver module 1108 is configured to receive an instruction sent by the first information transceiver module 1103 to the terminal indicating that the uplink detection module 1110 sends an uplink detection signal on the same frequency;

is also used to receive an instruction sent by the first information transceiver module 1103 to send out an inter-frequency uplink sounding signal;

The uplink detection module 1110 is used for the terminal to send an uplink detection signal on the current frequency;

It is also used to send out the inter-frequency uplink detection signal at the specified inter-frequency frequency point;

The inter-frequency measurement module 1111 is configured to perform inter-frequency measurement to obtain inter-frequency measurement results.

In practical applications, in the third optional composition structure of the base station selection system in the embodiment of the present invention, when the sixth optional process of the base station selection method shown in FIG. 8 is executed,

The measurement interval configuration information includes at least one of the following:

Measurement interval duration information, period information, start time offset information;

The preset channel quality range includes at least one of the following:

the lowest threshold value of the strength of the uplink sounding signal of the currently accessed frequency point; or,

The highest threshold value of the difference between the strength changes of the uplink sounding signal of the currently accessed frequency point.

The target base station selection module 1104 determines a handover base station for the terminal based on the intra-frequency measurement, including:

The target base station selection module 1104 determines at least one intra-frequency handover base station that satisfies the first handover condition based on the intra-frequency measurement, and determines one handover base station in the at least one intra-frequency handover base station; or,

When the target base station selection module 1104 determines based on the intra-frequency measurement that there is no intra-frequency handover base station that satisfies the first handover condition, it determines at least two intra-frequency handover base stations that satisfy the second handover condition, and executes at least two intra-frequency handover base stations that satisfy the second handover condition. One handover base station is determined among the multiple intra-frequency handover base stations.

The first switching condition may be:

Among the neighboring base stations that return the same-frequency measurement result, there is the same-frequency measurement result with the best same-frequency measurement result and meeting the requirements of the preset value;

At this time, the base station that meets the requirements is the base station to be handed over selected by the source base station;

If the target base station selection module 1104 determines based on the intra-frequency measurement that there is no intra-frequency handover base station that satisfies the first handover condition, the target base station selection module 1104 may select a suitable base station for the terminal according to the intra-frequency measurement The target base station group of the second handover condition, the target base station group includes at least two adjacent base stations, and the target base station selection module 1104 may select the adjacent base station with the best intra-frequency measurement result in the target base station group as the handover base station;

The second switching condition may include one of the following:

Among all neighboring base stations of the sent intra-frequency measurement results, the top N neighboring base stations in the same-frequency measurement results are collectively used as the target base station group, and preferably, N is 3; or,

Among all neighboring base stations that send the same-frequency measurement result, all the neighboring base stations whose value of the same-frequency measurement result is above the preset threshold value are collectively used as the target base station group.

The uplink sounding signal of the current frequency point sent by the uplink sounding module 1110 may carry the ID of the terminal and the ID information of the cell where the terminal is currently located, so that the neighbor base station can know which terminal in which cell the measured uplink sounding signal comes from.

When the channel quality judging module 1102 judges that the terminal channel quality exceeds the preset channel quality range, it sends an instruction to the third information transceiver module 1108 to instruct the uplink detection module 1110 to send an uplink detection signal on the same frequency. The signaling instructs the uplink sounding module 1110 to send an uplink sounding signal on the current frequency.

The uplink detection module 1110 sending the inter-frequency uplink detection signal includes one of the following situations:

The source base station cannot select an intra-frequency base station that meets the first handover condition or the second handover condition, and the source base station instructs the terminal to send uplink sounding signals at different frequencies through RRC dedicated signaling;

The third information transceiver module 1108 does not receive a handover command from the source base station within a predetermined period of time T1, and the uplink detection module 1110 sends an uplink detection signal at the designated inter-frequency frequency point after T1 times out; the predetermined time T1 is pre-configured by the source base station to the terminal through RRC dedicated signaling;

The inter-frequency frequency point may be pre-configured by the source base station to the terminal through RRC dedicated signaling, or it may be determined by the source base station based on the same-frequency measurement result fed back by the neighboring base station, and configured through RRC dedicated signaling. configured for the terminal.

The third information transceiving module 1108 receives the instruction to send the inter-frequency uplink sounding signal sent by the first information transmitting and receiving module 1103, and includes inter-frequency frequency point information required by the terminal to send the inter-frequency uplink sounding signal.

In the third optional structure of the base station selection system in the embodiment of the present invention, by executing the sixth optional process of the base station selection method shown in FIG. 8 , the source base station can select the needs for the terminal An intra-frequency target base station for handover can also be implemented to select an inter-frequency target base station for handover for the terminal.

FIG. 12 is a schematic diagram of the composition of a base station selection system in an embodiment of the present invention. As shown in FIG. 12 , the composition of a base station selection system in an embodiment of the present invention includes:

source base station 1201, adjacent base station 1202, terminal 1203, the number of the adjacent base station 1202 is at least one, the terminal 1203; wherein,

The source base station 1201 is used to determine that when the channel quality of the terminal 1203 exceeds the preset channel quality range,

sending the uplink sounding signal configuration information of the frequency point currently accessed by the terminal 1203 to the neighboring base station 1202;

receiving target base station selection judgment information sent by the neighboring base station 1202 that supports the frequency point;

When a handover base station can be determined for the terminal 1203 based on the target base station selection judgment information, the determined handover base station is used as the target base station of the terminal 1203;

It is also used for, when the target base station selection judgment information fails to determine the handover base station for the terminal 1203,

sending the inter-frequency downlink reference signal information of the neighboring base station 1202 to the terminal 1203;

receiving the inter-frequency measurement result sent by the terminal 1203, and determining an inter-frequency handover base station for the terminal 1203 based on the inter-frequency measurement result, and using the determined inter-frequency handover base station as the target base station of the terminal 1203;

The neighbor base station 1203 is used for the source base station 1201 to determine that when the terminal channel quality exceeds the preset channel quality range,

receiving the uplink sounding signal configuration information of the frequency point currently accessed by the terminal 1203 sent by the source base station 1201;

sending the target base station selection judgment information to the source base station 1201;

The terminal 1203 is used for when the source base station 1201 fails to determine the base station to switch for the terminal 1203 based on the target base station selection judgment information,

receiving the inter-frequency downlink reference signal information of the neighbor base station 1202 sent by the source base station 1201;

Send the inter-frequency measurement result to the source base station 1201 .

In practical applications, before the source base station 1201 judges that the channel quality of the terminal 1203 exceeds the preset terminal channel quality range,

The source base station 1201 is further configured to perform uplink measurement request broadcast or uplink measurement request multicast;

receiving the measurement interval configuration information sent by the neighbor base station 1202 in response to the uplink measurement request broadcast or uplink measurement request multicast;

Correspondingly, after the source base station 1201 determines that the channel quality of the terminal 1203 exceeds the preset channel quality range, the source base station 1201 is further used to:

sending an instruction to the terminal 1203 to instruct the terminal to send an uplink sounding signal on the same frequency;

receiving the intra-frequency measurement result sent by the neighboring base station 1202;

When the handover base station can be determined for the terminal based on the intra-frequency measurement result, the determined handover base station is used as the target base station of the terminal 1203;

When the source base station 1201 fails to determine a handover base station for the terminal 1203 based on the target base station selection judgment information, the neighboring base station 1202 is further used to:

sending the inter-frequency measurement result to the source base station 1201;

When the source base station 1201 fails to determine a handover base station for the terminal 1203 based on the target base station selection judgment information, the terminal 1203 is further used for:

receiving an instruction sent by the source base station 1201 to send an inter-frequency uplink sounding signal;

Send out the inter-frequency uplink detection signal on the specified inter-frequency frequency point.

The instruction to send the inter-frequency uplink sounding signal sent by the source base station 1201 includes inter-frequency frequency point information required by the terminal to send the inter-frequency uplink sounding signal.

FIG. 13 is a schematic diagram of a specific working process of a base station selection method in the embodiment of the present invention in FIG. 8 . As shown in FIG. 13 , the current working frequency of the terminal is f1, and the inter-frequency frequency points f2/f3/f4/f5 are preset by the source base station. Configured to the terminal through dedicated signaling; the neighboring base station only works on the f3 frequency point, and performs measurement and data transmission and reception in a periodic manner, such as 6ms measurement and 74ms data transmission and reception every 80ms.

When the source base station finds that the channel quality of the terminal is poor, it instructs the terminal to send an uplink sounding signal on the current frequency point through dedicated signaling, and sends the same-frequency sounding signal sending time T1 to the terminal.

When the terminal finds that it has not received the handover command from the source base station during the T1 period, it sends an uplink sounding signal at the inter-frequency frequency points f2/f3/f4/f5. The probe signals on the first and third frequency points f3 sent by the terminal fall within the measurement interval of the adjacent base station, and the second probe signal is not within the measurement interval of the adjacent base station. Therefore, the adjacent base station is based on the measurement interval of the terminal. The probe signals on the first and third frequency points of f3 are measured and the measurement results are fed back to the source base station.

The above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (20)

1. A method for base station selection, the method comprising:

when the source base station judges that the channel quality of the terminal exceeds the preset channel quality range,

sending uplink detection signal configuration information of a frequency point currently accessed by the terminal to an adjacent base station;

receiving target base station selection judgment information sent by a neighboring base station supporting the frequency point, wherein the target base station selection judgment information comprises: the same frequency measurement result of the adjacent base station and the downlink transmitting power of the adjacent base station;

when a switching base station can be determined for the terminal based on the target base station selection judgment information, taking the determined switching base station as the target base station of the terminal;

the determining a handover base station for the terminal based on the target base station selection judgment information includes:

the source base station determines at least one same-frequency switching base station meeting a first switching condition based on the target base station selection judgment information, and determines one switching base station in the at least one same-frequency switching base station; or,

and when the source base station determines that no co-frequency switching base station meeting the first switching condition is determined based on the target base station selection judgment information, determining a target base station group meeting a second switching condition, and determining a switching base station in the target base station group.

2. The method of claim 1, wherein when the target base station selection decision information fails to determine a handover base station for the terminal, the method further comprises:

the source base station sends the pilot frequency downlink reference signal information of the adjacent base station to a terminal;

and receiving a pilot frequency measurement result sent by the terminal, determining a pilot frequency switching base station for the terminal based on the pilot frequency measurement result, and taking the determined pilot frequency switching base station as a target base station of the terminal.

3. The method of claim 1, wherein the uplink sounding signal configuration information comprises at least one of:

time-frequency position information of the uplink detection signal, period information of the uplink detection signal and frequency point information of the uplink detection signal.

4. A method for base station selection, the method comprising:

when the source base station judges that the channel quality of the terminal exceeds the preset channel quality range,

the source base station sends first indication information to the terminal, and the first indication information is used for indicating the terminal to send a same-frequency uplink detection signal;

receiving a same-frequency measurement result sent by an adjacent base station;

when a switching base station can be determined for the terminal based on the same frequency measurement result, the determined switching base station is used as a target base station of the terminal;

the determining a handover base station for the terminal based on the intra-frequency measurement result includes:

the source base station determines at least one same-frequency switching base station meeting a first switching condition based on the same-frequency measurement result, and determines a switching base station in the at least one same-frequency switching base station; or,

and when the source base station determines that no co-frequency switching base station meeting the first switching condition exists based on the co-frequency measurement result, determining a target base station group meeting a second switching condition, and determining a switching base station in the target base station group.

5. The method of claim 4, wherein before the source base station determines that the channel quality of the terminal exceeds the preset channel quality range, the method further comprises:

the source base station carries out uplink measurement request broadcast or uplink measurement request multicast;

and receiving measurement interval configuration information sent by the adjacent base station responding to the uplink measurement request broadcast or the uplink measurement request multicast.

6. The method according to claim 4, wherein when determining a handover base station for the terminal based on intra-frequency measurement results of the neighboring base stations, the method further comprises:

the source base station sends second indication information to a terminal, wherein the second indication information is used for indicating the terminal to send a pilot frequency uplink detection signal;

receiving the pilot frequency measurement result sent by the adjacent base station; and determining a pilot frequency switching base station for the terminal based on the pilot frequency measurement result, and taking the determined pilot frequency switching base station as a target base station of the terminal.

7. A method for base station selection, the method comprising:

an adjacent base station receives uplink detection signal configuration information of a frequency point which is sent by a source base station and is currently accessed by a terminal;

sending target base station selection judgment information to the source base station, wherein the target base station selection judgment information comprises: the same frequency measurement result of the adjacent base station and the downlink transmitting power of the adjacent base station.

8. The method of claim 7, further comprising:

responding to an uplink measurement request broadcast or an uplink measurement request multicast sent by the source base station;

sending measurement interval configuration information of the adjacent base station to the source base station;

and sending the same-frequency measurement result to the source base station.

9. The method of claim 7, wherein when the source base station fails to determine a handover base station for the terminal based on the target base station selection determination information, the method further comprises:

and sending the pilot frequency measurement result to the source base station.

10. A base station selection system, the system comprising:

a channel quality judging module, a first information transceiving module and a target base station selecting module, wherein,

the channel quality judging module is used for judging whether the channel quality of the terminal exceeds a preset channel quality range;

the first information transceiver module is used for sending the uplink detection signal configuration information of the frequency point currently accessed by the terminal to an adjacent base station;

and the target base station is further configured to receive target base station selection judgment information sent by a neighboring base station supporting the frequency point, where the target base station selection judgment information includes: the same frequency measurement result of the adjacent base station and the downlink transmitting power of the adjacent base station;

the target base station selection module is used for determining a switching base station for the terminal based on the target base station selection judgment information and taking the determined switching base station as the target base station of the terminal;

the target base station selection module is specifically configured to:

determining at least one same-frequency switching base station meeting a first switching condition based on the target base station selection judgment information, and determining one switching base station in the at least one same-frequency switching base station; or,

and when determining that no co-frequency switching base station meeting the first switching condition is determined based on the target base station selection judgment information, determining a target base station group meeting a second switching condition, and determining a switching base station in the target base station group.

11. The system according to claim 10, wherein when the handover base station is not determined for the terminal based on the target base station selection judgment information,

the first information transceiving module is further configured to: sending the pilot frequency downlink reference signal information of the adjacent base station to a terminal, and receiving a pilot frequency measurement result sent by the terminal;

the target base station selection module is further configured to: and determining a pilot frequency switching base station for the terminal based on the pilot frequency measurement result, and taking the determined pilot frequency switching base station as a target base station of the terminal.

12. The system according to claim 10, wherein the uplink sounding signal configuration information includes at least one of:

time-frequency position information of the uplink detection signal, period information of the uplink detection signal and frequency point information of the uplink detection signal.

13. The system of claim 10, wherein when the channel quality determination module determines that the channel quality of the terminal exceeds a preset channel quality range,

the first information transceiving module is further configured to: sending first indication information to the terminal, wherein the first indication information is used for indicating the terminal to send a same-frequency uplink detection signal; receiving the same-frequency measurement result sent by the adjacent base station;

the target base station selection module is further configured to: and determining a switching base station for the terminal based on the same frequency measurement result, and taking the determined switching base station as a target base station of the terminal.

14. The system of claim 13, further comprising:

a broadcast module; the channel quality judging module is used for carrying out uplink measurement request broadcast or uplink measurement request multicast before judging that the terminal channel quality exceeds a preset terminal channel quality range;

the first information transceiving module is further configured to: and receiving measurement interval configuration information sent by the adjacent base station responding to the uplink measurement request broadcast or the uplink measurement request multicast.

15. The system according to claim 13, wherein when the target base station selection module fails to determine a handover base station for the terminal based on intra-frequency measurement results of the neighboring base stations,

the first information transceiving module is further configured to: sending second indication information to a terminal, wherein the second indication information is used for indicating the terminal to send a pilot frequency uplink detection signal and receiving a pilot frequency measurement result sent by the adjacent base station;

the target base station selection module is further configured to: and determining a pilot frequency switching base station for the terminal based on the pilot frequency measurement result, and taking the determined pilot frequency switching base station as a target base station of the terminal.

16. A base station selection system, the system comprising:

the second information transceiver module and the same frequency measurement module;

the second information transceiver module is configured to receive uplink sounding signal configuration information of a frequency point currently accessed by a terminal, which is sent by a source base station, and send target base station selection judgment information to the source base station, where the target base station selection judgment information includes: the same frequency measurement result of the adjacent base station and the downlink transmitting power of the adjacent base station;

and the same frequency measurement module is used for carrying out same frequency measurement according to the uplink detection signal configuration information of the frequency point currently accessed by the terminal.

17. The system of claim 16, further comprising:

the broadcast response module and the pilot frequency measurement module;

the broadcast response module is used for responding to the uplink measurement request broadcast or the uplink measurement request multicast sent by the source base station;

the pilot frequency measurement module is used for performing pilot frequency measurement to obtain a pilot frequency measurement result;

the second information transceiver module is further configured to:

sending measurement interval configuration information of an adjacent base station to the source base station;

and sending the same-frequency measurement result to the source base station.

18. The system according to claim 16, wherein when the target base station selection judgment information fails to determine a handover base station for the terminal, the second information transceiver module is further configured to:

and sending the pilot frequency measurement result to the source base station.

19. A base station selection system, the system comprising: a source base station, at least one neighbor base station, a terminal, wherein,

the source base station is used for judging that the channel quality of the terminal exceeds the preset channel quality range,

sending uplink detection signal configuration information of a frequency point currently accessed by the terminal to the adjacent base station;

receiving target base station selection judgment information sent by the adjacent base station supporting the frequency point, wherein the target base station selection judgment information comprises: the same frequency measurement result of the adjacent base station and the downlink transmitting power of the adjacent base station;

when a switching base station can be determined for the terminal based on the target base station selection judgment information, taking the determined switching base station as the target base station of the terminal;

when the handover base station cannot be determined for the terminal based on the target base station selection judgment information,

the source base station is further configured to:

sending the pilot frequency downlink reference signal information of the adjacent base station to the terminal;

receiving a pilot frequency measurement result sent by the terminal, determining a pilot frequency switching base station for the terminal based on the pilot frequency measurement result, and taking the determined pilot frequency switching base station as a target base station of the terminal;

the adjacent base station is used for judging that the channel quality of the terminal exceeds the preset channel quality range by the source base station,

receiving uplink detection signal configuration information of a frequency point currently accessed by the terminal, which is sent by the source base station;

sending the target base station selection judgment information to the source base station;

the terminal is used for determining a switching base station for the terminal when the source base station fails to determine the switching base station based on the target base station selection judgment information,

receiving pilot frequency downlink reference signal information of the adjacent base station sent by the source base station;

sending the pilot frequency measurement result to the source base station;

the determining a handover base station for the terminal based on the target base station selection judgment information includes:

the source base station determines at least one same-frequency switching base station meeting a first switching condition based on the target base station selection judgment information, and determines one switching base station in the at least one same-frequency switching base station; or,

and when the source base station determines that no co-frequency switching base station meeting the first switching condition is determined based on the target base station selection judgment information, determining a target base station group meeting a second switching condition, and determining a switching base station in the target base station group.

20. The system of claim 19, wherein before the source base station determines that the terminal channel quality is beyond a preset terminal channel quality range,

the source base station is also used for carrying out uplink measurement request broadcast or uplink measurement request multicast;

receiving measurement interval configuration information sent by the adjacent base station responding to the uplink measurement request broadcast or the uplink measurement request multicast;

correspondingly, after the source base station judges that the terminal channel quality exceeds the preset channel quality range, the source base station is further configured to:

sending an indication for indicating the terminal to send a same-frequency uplink detection signal to the terminal;

receiving a same-frequency measurement result sent by the adjacent base station;

when a switching base station can be determined for the terminal based on the same frequency measurement result, the determined switching base station is used as a target base station of the terminal;

when the source base station fails to determine a handover base station for the terminal based on the target base station selection judgment information, the neighboring base station is further configured to:

sending the pilot frequency measurement result to the source base station;

when the source base station fails to determine a handover base station for the terminal based on the target base station selection judgment information, the terminal is further configured to:

receiving an indication of sending out a pilot frequency uplink detection signal sent by the source base station;

and sending out pilot frequency uplink detection signals on the specified pilot frequency points.

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