CN110167048B - Communication method and system, base station and mobile switching center - Google Patents

Communication method and system, base station and mobile switching center Download PDF

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CN110167048B
CN110167048B CN201910434935.3A CN201910434935A CN110167048B CN 110167048 B CN110167048 B CN 110167048B CN 201910434935 A CN201910434935 A CN 201910434935A CN 110167048 B CN110167048 B CN 110167048B
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information
terminal
dropped
cell
frequency point
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CN110167048A (en
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张余
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0289—Congestion control

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention relates to a communication method and system, a base station and a mobile switching center. Wherein, the method comprises the following steps: responding to a service request sent by a first terminal, determining first information to be dropped of the first terminal, selecting second information to be dropped from the first information to be dropped according to a cell information table, wherein the cell information table is used for storing each cell identifier and each frequency point information of a congestion state, sending the second information to be dropped to the first terminal, so that the first terminal can measure the information to be fallen back, receive the measuring result fed back by the first terminal, determining target information to be fallen back according to the measuring result, sending the target cell identification and the target frequency point information to the first terminal, the first terminal can fall back and establish the call connection with the second terminal, so that the technical problem that the reliability of cell selection cannot be ensured due to the complex algorithm is solved, the calculation resources are saved, and the technical effect of realizing good communication is ensured.

Description

Communication method and system, base station and mobile switching center
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a communication method and system, a base station and a mobile switching center.
Background
With the rapid development of the internet, 2G networks have rapidly developed into 4G and 5G networks.
In the prior art, when establishing a call connection, a terminal needs to perform reasonable cell selection through a complex algorithm and system parameters, and balance the load of a network in a cell reselection manner.
In the process of the inventor for realizing the invention, at least the following problems are found:
due to the complexity of the algorithm, the reliability of cell selection cannot be ensured.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a communication method and system, a base station, and a mobile switching center, aiming at the above-mentioned defects existing in the prior art, so as to solve the problem that the reliability of cell selection cannot be ensured due to the complex algorithm existing in the prior art.
According to an aspect of an embodiment of the present invention, an embodiment of the present invention provides a communication method, including:
responding to a service request sent by a first terminal, and determining first information to be dropped of the first terminal, wherein the first information to be dropped comprises a first cell identifier to be dropped and first information of frequency points to be dropped, and the service request is sent when the first terminal receives a call invitation sent by a second terminal;
selecting second information to be dropped from the first information to be dropped according to a preset cell information table, wherein the second information to be dropped comprises second cell identification to be dropped and second frequency point information to be dropped, and the cell information table is used for storing each cell identification and each frequency point information in a congestion state;
sending the second information to be fallen back to the first terminal so that the first terminal can measure the information to be fallen back;
receiving a measurement result fed back by the first terminal;
determining target information to be fallen back according to the measurement result, wherein the target information to be fallen back comprises a target cell identification to be fallen back and target frequency point information to be fallen back;
and sending the target cell identifier to be fallen back and the target frequency point information to the first terminal so that the first terminal can fall back and establish a call connection with the second terminal.
In some embodiments, the method further comprises:
receiving prompt information sent by a mobile switching center through a mobile management node;
responding to the cell identification and the frequency point information of the congestion state carried in the prompt message, and adding the cell identification and the frequency point information of the congestion state to a cell information table;
and deleting the cell identification and the point information of the congestion relief state from a cell information table in response to the cell identification and the point information of the congestion relief state carried in the prompt message.
According to another aspect of the embodiments of the present disclosure, there is also provided a communication method, including:
acquiring state information of each cell;
responding to the condition information of any cell as a congestion state, and generating first prompt information carrying cell identification and frequency point information of the corresponding cell, wherein the duration of the congestion state is greater than or equal to a preset first duration;
and sending the first prompt message to a mobile management node so that the mobile management node can send the first prompt message to a base station.
In some embodiments, after obtaining the status information of each cell, the method further includes:
responding to the cell in the congestion state to recover to the normal state, and recovering the normal state for a preset second time length, and generating second prompt information carrying cell identification and frequency point information of the corresponding cell;
and sending the second prompt message to the mobile management node so that the mobile management node can send the second prompt message to the base station.
According to another aspect of the embodiments of the present disclosure, there is also provided a base station, including:
the determining module is configured to determine first information to be dropped of a first terminal in response to a service request sent by the first terminal, where the first information to be dropped includes a first cell identifier to be dropped and first frequency point information to be dropped, and the service request is sent when the first terminal receives a call invitation sent by a second terminal;
a selecting module, configured to select second information to be dropped from the first information to be dropped according to a preset cell information table, where the second information to be dropped includes a second cell identifier to be dropped and second information of frequency points to be dropped, and the cell information table is used to store each cell identifier and each information of frequency points in a congestion state;
the first sending module is used for sending the second information to be fallen back to the first terminal so that the first terminal can measure the information to be fallen back;
a receiving module, configured to receive a measurement result fed back by the first terminal;
the determining module is further configured to determine target information to be dropped according to the measurement result, where the target information to be dropped includes a target cell identifier to be dropped and target frequency point information to be dropped;
the first sending module is further configured to send the target cell identifier to be dropped and the target frequency point information to be dropped to the first terminal, so that the first terminal performs dropping and establishes a call connection with the second terminal.
In some embodiments, the base station further comprises:
the receiving module is also used for receiving prompt information sent by the mobile switching center through the mobile management node;
the adding module is used for responding to the cell identification and the frequency point information of the congestion state carried in the prompt message and adding the cell identification and the frequency point information of the congestion state to a cell information table;
and the deleting module is used for responding to the cell identification and the point information which carry the congestion relieving state in the prompt message, and deleting the cell identification and the point information which relieve the congestion state from a cell information table.
According to another aspect of the embodiments of the present disclosure, there is also provided a mobile switching center, including:
the acquisition module is used for acquiring the state information of each cell;
the generating module is used for responding to the condition information of any cell being in a congestion state, and the duration of the congestion state is greater than or equal to a preset first duration, and generating first prompt information carrying cell identification and frequency point information of the corresponding cell;
and the second sending module is used for sending the first prompt message to a mobile management node so that the mobile management node can send the first prompt message to a base station.
In some embodiments of the present invention, the,
the generation module is further used for responding to the cell in the congestion state recovering to the normal state, and the cell in the congestion state recovering to the normal state for a preset second time length, and generating second prompt information carrying cell identification and frequency point information of the corresponding cell;
the second sending module is further configured to send the second prompt message to the mobility management node, so that the mobility management node sends the second prompt message to the base station.
According to another aspect of the embodiments of the present disclosure, there is also provided a communication system including at least one of:
the base station of any of the above embodiments;
the mobile switching center of any of the above embodiments.
In some embodiments, if the system comprises the base station and the mobile switching center, the system further comprises a mobility management node, wherein,
the mobile switching center is used for responding to the received call invitation initiated by the second terminal, determining the interface information of the first terminal according to the call invitation, and forwarding the call invitation to the mobile management node according to the interface information;
the mobile management node is configured to determine the first terminal according to the call invitation, and send the call invitation to the first terminal, so that the first terminal sends a service request to the base station.
The embodiment of the invention has the advantages that as the first to-be-dropped information of the first terminal is determined in response to the service request sent by the first terminal, wherein the first to-be-dropped information comprises a first to-be-dropped cell identifier and first to-be-dropped frequency point information, the service request is sent by the first terminal when the first terminal receives the call invitation sent by the second terminal, the second to-be-dropped information is selected from the first to-be-dropped information according to a preset cell information table, wherein the second to-be-dropped information comprises a second to-be-dropped cell identifier and second to-be-dropped frequency point information, the cell information table is used for storing each cell identifier and each frequency point information in a congestion state, the second to-be-dropped information is sent to the first terminal so that the first terminal can measure the to-be-dropped information, the measurement result fed back by the first terminal is received, the target to-be-dropped information is determined according to the measurement result, the target information to be dropped comprises a target cell identifier to be dropped and target frequency point information to be dropped, and the target cell identifier to be dropped and the target frequency point information to be dropped are sent to the first terminal, so that the first terminal can drop and establish a call connection with the second terminal.
Drawings
Fig. 1 is a schematic diagram of a communication method of an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a communication method according to another embodiment of the present disclosure;
fig. 3 is a schematic diagram of a base station provided in an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a mobile switching center according to an embodiment of the present disclosure;
reference numerals:
1. the device comprises a determining module, 2, a selecting module, 3, a first sending module, 4, a receiving module, 5, an adding module, 6, a deleting module, 11, an obtaining module, 12, a generating module, 13 and a second sending module.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
The embodiment of the invention provides a communication method and system, a base station and a mobile switching center.
According to an aspect of an embodiment of the present invention, an embodiment of the present invention provides a communication method.
Referring to fig. 1, fig. 1 is a schematic diagram of a communication method according to an embodiment of the disclosure.
As shown in fig. 1, the method includes:
s1: the base station responds to a service request sent by a first terminal, and determines first information to be dropped of the first terminal, wherein the first information to be dropped comprises a first cell identifier to be dropped and first information of frequency points to be dropped, and the service request is sent when the first terminal receives a call invitation sent by a second terminal.
The base station is preferably an evolved base station in consideration of the protocol hierarchy during communication. The Evolved Node B is called Evolved Node B (eNB) in english. Compared with a 3G mobile base station (Node B) in the existing 3G, the function of a part of Radio Network controllers (RNC for short) is integrated, and the level of a protocol during communication is reduced.
In this step, the second terminal is a calling terminal, and the first terminal is a called terminal. When a calling user initiates a call invitation to a called terminal (i.e., a first terminal) of a called user through a calling terminal (i.e., a second terminal), the called terminal sends a service request to an eNB in order to establish a communication connection between the called terminal and the calling terminal.
And the eNB receives a service request sent by the first terminal and determines first information to be returned. For the specific determination, reference may be made to the prior art. If so, the location information of the first terminal is obtained, the cell corresponding to the first terminal is determined according to the location information of the first terminal, and the first information to be dropped is determined according to the cell corresponding to the first terminal.
S2: and the base station selects second information to be dropped from the first information to be dropped according to a preset cell information table, wherein the second information to be dropped comprises second cell identification to be dropped and second frequency point information to be dropped, and the cell information table is used for storing each cell identification and each frequency point information in a congestion state.
That is, the cell information table identifies cells in which signals are discontinuous and good communication cannot be achieved.
For example, if the first to-be-fallback information includes five first to-be-fallback cell identifiers, it is determined whether the cell information table includes one or more of the five first to-be-fallback cell identifiers, and the first to-be-fallback cell identifier that is not included in the cell information table is selected as the second to-be-fallback cell identifier.
Similarly, the selection of the second to-be-dropped frequency point information is also the same, and is not described herein again.
This step may be understood as a step of screening the first information to be dropped, and since part of the first information to be dropped is deleted, load reduction can be achieved. And the first information to be dropped with poor signal quality is deleted, so that the first terminal can be prevented from dropping to a cell incapable of realizing good communication, and the reliability of communication is ensured.
S3: and the base station sends the second information to be fallen back to the first terminal so that the first terminal can measure the information to be fallen back.
S4: and the base station receives the measurement result fed back by the first terminal.
S5: and the base station determines target information to be fallen back according to the measurement result, wherein the target information to be fallen back comprises a target cell identification to be fallen back and target frequency point information to be fallen back.
S6: and the base station sends the target cell identification to be fallen back and the target frequency point information to be fallen back to the first terminal so that the first terminal can fall back and establish call connection with the second terminal.
With reference to S3 to S6, after selecting the second information to be dropped from the first information to be dropped, the base station sends the second information to be dropped to the first terminal, and the first terminal performs measurement (the specific measurement process may refer to the prior art, and is not described here again), and after receiving the measurement result, selects the target information to be dropped from the second information to be dropped.
Wherein the communication capability and strength of each cell can be learned through the measurement results. Therefore, the base station selects the cell identifier and the frequency point information with the strongest communication capability (namely the determined target information to be dropped) from the information to be dropped according to the measurement result, so that the first terminal can drop to the cell identifier and the frequency point information with the strongest communication capability, and further, the good communication between the first terminal and the second terminal is realized.
In some embodiments, the method further includes a step of determining, by the base station, a cell information table, specifically:
s01: and the base station receives the prompt message sent by the mobile switching center through the mobile management node.
Among them, all english of the Mobile Switching Center is called Mobile Switching Center, and english is abbreviated as MSC. The Mobile switching center is the core of the whole Global System for Mobile Communication (GSM), and controls the services of all Base Station Controllers (BSC), providing switching functions and connections with other functions in the System.
Specifically, the mobile switching center sends the prompt information to the mobile management node, and the mobile management node forwards the prompt information to the base station.
S02: and responding to the cell identification and the frequency point information of the congestion state carried in the prompt message, and adding the cell identification and the frequency point information of the congestion state to a cell information table by the base station.
When there is no cell id and no frequency point information in the congested state, the cell information table is empty.
S03: and in response to the fact that the prompt message carries the cell identification and the point information for releasing the congestion state, the base station deletes the cell identification and the point information for releasing the congestion state from the cell information table.
It can be understood that, in the process of performing S1 to S6, if the base station receives the notification information (including the notification information carrying the cell identifier and the frequency point information in the congested state and the notification information carrying the cell identifier and the frequency point information in the decongested state) sent by the mobile switching center, the base station may synchronously perform corresponding processing (i.e., adding or deleting) on the cell information table.
According to another aspect of the embodiments of the present disclosure, there is also provided a communication method.
Referring to fig. 2, fig. 2 is a schematic diagram of a communication method according to another embodiment of the disclosure.
As shown in fig. 2, the method includes:
s11: the mobile switching center acquires the state information of each cell.
In some embodiments, the frequency with which the mobile switching center obtains status information for each cell may be set. For example, the state information of each cell is acquired every five seconds. The specific frequency can be set based on actual requirements or empirical values, and is not limited herein.
S12: and in response to the condition information of any cell being in a congestion state and the time of the congestion state being greater than or equal to a preset first time length, the mobile switching center generates first prompt information carrying cell identification and frequency point information of the corresponding cell.
In this step, it specifically includes:
judging whether the state information of each cell is in a congestion state, if so, continuously acquiring the duration of the cell in the congestion state, and if the duration reaches a first time length, acquiring the cell identifier and the frequency point information corresponding to the cell to generate prompt information and generating first prompt information carrying the cell identifier and the frequency point information of the corresponding cell.
S13: and sending the first prompt message to the mobile management node so that the mobile management node forwards the first prompt message to the base station.
In some embodiments, the method further comprises:
s14: and the mobile switching center responds to the cell in the congestion state to recover to the normal state, and the cell recovers to the normal state for a preset second time length to generate second prompt information carrying the cell identification and the frequency point information of the corresponding cell.
S15: and sending the second prompt message to the mobile management node so that the mobile management node forwards the second prompt message to the base station.
It can be understood that the method further includes starting the joint attach procedure after the first terminal and the second terminal are turned on. Taking the first terminal as an example, the joint attach procedure of the first terminal is described as follows:
the first terminal sends an Attach Request message (specifically an Attach Request message) to a mobile management node (MME).
The Attach request message carries an Attach parameter (i.e., Attach Type), where the Attach parameter is used to indicate that the Attach procedure is a combined EPS/IMSI Attach procedure, and the Attach parameter is used to indicate that the terminal has CS network Attach capability.
The mobility management node sends an attach request message to a Visitor Location Register (VLR).
The attach parameter further includes attribute information of the terminal (e.g., an interface of the terminal, etc.), a Location area identifier, a user identifier (i.e., an international mobile subscriber identity), attribute information of the mobility management node (e.g., a name of the mobility management node, etc.), a Location Update Type (Location Update Type), and the like.
The visitor location register stores the attachment parameters and creates an interface association (SGs association) for this terminal under the mobility management node.
The visitor location Register initiates a location update procedure to a home location Register (hereinafter, referred to as "home location Register", abbreviated as "HLR") according to the attachment parameter.
And the visitor location register generates update confirmation information and sends the update confirmation information to the mobile management node.
The mobile management node sends an Attach Accept message (Attach Accept message) to the multimode card to complete the joint Attach.
According to another aspect of the disclosed embodiment, the disclosed embodiment further provides a base station.
Referring to fig. 3, fig. 3 is a schematic diagram of a base station according to an embodiment of the disclosure.
As shown in fig. 3, the base station includes:
the determining module 1 is configured to determine first information to be dropped of a first terminal in response to a service request sent by the first terminal, where the first information to be dropped includes a first cell identifier to be dropped and first frequency point information to be dropped, and the service request is sent when the first terminal receives a call invitation sent by a second terminal;
the selecting module 2 is configured to select second information to be dropped from the first information to be dropped according to a preset cell information table, where the second information to be dropped includes a second cell identifier to be dropped and second information of frequency points to be dropped, and the cell information table is used to store each cell identifier and each information of frequency points in a congestion state;
the first sending module 3 is configured to send the second information to be dropped to the first terminal, so that the first terminal can measure the information to be dropped;
the receiving module 4 is configured to receive a measurement result fed back by the first terminal;
the determining module 1 is further configured to determine target information to be dropped according to the measurement result, where the target information to be dropped includes a target cell identifier to be dropped and target frequency point information to be dropped;
the first sending module 3 is further configured to send the target cell identifier to be dropped and the target frequency point information to be dropped to the first terminal, so that the first terminal performs dropping and establishes a call connection with the second terminal.
As can be seen in fig. 3, the base station further includes:
the receiving module 4 is further configured to receive a prompt message sent by the mobile switching center through the mobility management node;
the adding module 5 is configured to respond to the cell identifier and the frequency point information in the congestion state carried in the prompt message, and add the cell identifier and the frequency point information in the congestion state to the cell information table;
and the deleting module 6 is used for responding to the cell identifier and the point information which carry the congestion relieving state in the prompt message, and deleting the cell identifier and the point information which relieve the congestion state from the cell information table.
According to another aspect of the disclosed embodiment, the disclosed embodiment further provides a mobile switching center.
Referring to fig. 4, fig. 4 is a schematic diagram of a mobile switching center according to an embodiment of the disclosure.
As shown in fig. 4, the mobile switching center includes:
an obtaining module 11, configured to obtain state information of each cell;
the generating module 12 is configured to generate first prompt information carrying cell identifiers and frequency point information of corresponding cells in response to that the state information of any cell is a congestion state, and a duration of the congestion state is greater than or equal to a preset first duration;
a second sending module 13, configured to send the first prompt message to the mobility management node, so that the mobility management node forwards the first prompt message to the base station.
In some embodiments, the generating module 12 is further configured to generate a second prompt message carrying the cell identifier and the frequency point information of the corresponding cell in response to that the cell in the congestion state is restored to the normal state and the normal state is restored for a preset second duration;
the second sending module 13 is further configured to send the second prompt message to the mobility management node, so that the mobility management node forwards the second prompt message to the base station.
According to another aspect of the embodiments of the present disclosure, there is also provided a communication system including at least one of:
the base station of any of the above embodiments;
the mobile switching center of any of the above embodiments.
In some embodiments, if the system comprises a base station and a mobile switching center, the system further comprises a mobility management node, wherein,
the mobile switching center is used for responding to the received call invitation initiated by the second terminal, determining the interface information of the first terminal according to the call invitation, and forwarding the call invitation to the mobile management node according to the interface information;
the mobile management node is used for determining the first terminal according to the call invitation and sending the call invitation to the first terminal so that the first terminal can send a service request to the base station.
Illustratively, the call session control device of the second terminal initiates a query request to the home location register according to the called number carried in the call invitation.
And the home location register determines a mobile switching center corresponding to the first terminal according to the called number, and sends the information of the mobile switching center to the call session control equipment.
The call session control device sends a call invitation to the mobile switching center.
And the mobile switching center determines the interface information of the first terminal according to the call invitation and forwards the call invitation to the mobile management node according to the interface information.
And the mobile management node determines the first terminal according to the call invitation and sends the call invitation to the first terminal.
And the first terminal sends a service request to the base station when receiving the call invitation sent by the mobile management node.
The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It should also be understood that, in the embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (6)

1. A method of communication, the method comprising:
responding to a service request sent by a first terminal, and determining first information to be dropped of the first terminal, wherein the first information to be dropped comprises a first cell identifier to be dropped and first information of frequency points to be dropped, and the service request is sent when the first terminal receives a call invitation sent by a second terminal;
selecting second information to be dropped from the first information to be dropped according to a preset cell information table, wherein the second information to be dropped comprises second cell identification to be dropped and second frequency point information to be dropped, and the cell information table is used for storing each cell identification and each frequency point information in a congestion state;
sending the second information to be fallen back to the first terminal so that the first terminal can measure the information to be fallen back;
receiving a measurement result fed back by the first terminal;
determining target information to be fallen back according to the measurement result, wherein the target information to be fallen back comprises a target cell identification to be fallen back and target frequency point information to be fallen back;
and sending the target cell identifier to be fallen back and the target frequency point information to the first terminal so that the first terminal can fall back and establish a call connection with the second terminal.
2. The method of claim 1, further comprising:
receiving prompt information sent by a mobile switching center through a mobile management node;
responding to the cell identification and the frequency point information of the congestion state carried in the prompt message, and adding the cell identification and the frequency point information of the congestion state to a cell information table;
and deleting the cell identification and the point information of the congestion relief state from a cell information table in response to the cell identification and the point information of the congestion relief state carried in the prompt message.
3. A base station, characterized in that the base station comprises:
the determining module is configured to determine first information to be dropped of a first terminal in response to a service request sent by the first terminal, where the first information to be dropped includes a first cell identifier to be dropped and first frequency point information to be dropped, and the service request is sent when the first terminal receives a call invitation sent by a second terminal;
a selecting module, configured to select second information to be dropped from the first information to be dropped according to a preset cell information table, where the second information to be dropped includes a second cell identifier to be dropped and second information of frequency points to be dropped, and the cell information table is used to store each cell identifier and each information of frequency points in a congestion state;
the first sending module is used for sending the second information to be fallen back to the first terminal so that the first terminal can measure the information to be fallen back;
a receiving module, configured to receive a measurement result fed back by the first terminal;
the determining module is further configured to determine target information to be dropped according to the measurement result, where the target information to be dropped includes a target cell identifier to be dropped and target frequency point information to be dropped;
the first sending module is further configured to send the target cell identifier to be dropped and the target frequency point information to be dropped to the first terminal, so that the first terminal performs dropping and establishes a call connection with the second terminal.
4. The base station of claim 3, wherein the base station further comprises:
the receiving module is also used for receiving prompt information sent by the mobile switching center through the mobile management node;
the adding module is used for responding to the cell identification and the frequency point information of the congestion state carried in the prompt message and adding the cell identification and the frequency point information of the congestion state to a cell information table;
and the deleting module is used for responding to the cell identification and the point information which carry the congestion relieving state in the prompt message, and deleting the cell identification and the point information which relieve the congestion state from a cell information table.
5. A communication system, the system comprising at least one of:
the base station of claim 3 or 4.
6. The system of claim 5, further comprising a mobility management node, wherein,
the mobile switching center is used for responding to the received call invitation initiated by the second terminal, determining the interface information of the first terminal according to the call invitation, and forwarding the call invitation to the mobile management node according to the interface information;
the mobile management node is configured to determine the first terminal according to the call invitation, and send the call invitation to the first terminal, so that the first terminal sends a service request to the base station.
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