Disclosure of Invention
The present invention is directed to a method, a communication system, and a source base station for implementing a bias base station in an LTE system, which address the above-mentioned drawbacks of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for realizing inclined base stations in an LTE system is constructed, and comprises the following steps: when user equipment is simultaneously covered by a source base station and a target base station, the user equipment detects that the signal intensity of the source base station is greater than that of the target base station, the user equipment is accessed from the source base station, and an inclined target public land mobile network of the user equipment is the target base station, the following steps are executed:
s1, the core network confirms that the user equipment is not accessed from the target base station;
s2, the core network sending identification information identifying the ue and the target base station to the source base station;
s3, the source base station receives the identification information and switches the user equipment to access the target base station according to the identification information.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in the step S2, the core network sends the identification information during the process that the user equipment accesses the source base station.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in step S2, the core network and the source base station both store a mapping relationship between a user file code and the target public land mobile network; the identification information comprises a user file code of the user equipment.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in step S2, the identification information is issued through an initial context setup request message.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in the step S2, the core network sends the identification information after the user equipment accesses the source base station.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in the step S2, the identification information includes a target public land mobile network identity and the user equipment identity corresponding to the target base station.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in the step S2, the identification information is issued through a private signaling.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, in the step S4,
and after receiving the identification information, the source base station adopts a switching or redirection mode based on measurement report to enable the user equipment to access the target base station.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, the switching manner based on measurement reporting includes:
s301, the source base station issues measurement configuration to the user equipment according to the identification information;
s302, the user equipment executes measurement and reports the measurement result to the source base station;
s303, the source base station sends a switching command to the user equipment according to the measurement result;
s304, the user equipment is switched to the target base station.
In the method for implementing a bias base station in an LTE system according to the present invention, preferably, the redirection method includes:
s311, the source base station sends a connection release message containing the radio resource control of the frequency point of the target base station to the user equipment;
s312, the user equipment is switched to the target base station.
The present invention also constructs a communication system comprising: a core network, a target base station, a source base station and user equipment;
the core network is configured to determine that the user equipment is not accessed from the target base station, and send identification information identifying the user equipment and the target base station to the source base station;
and the source base station is used for receiving the identification information and switching the user equipment to access the target base station according to the identification information.
Preferably, the core network is configured to send the identification information in a process that the user equipment accesses the source base station; or
The core network is used for sending the identification information after the user equipment accesses the source base station.
Preferably, the core network and the source base station both store a mapping relationship between a user file code and the target public land mobile network; the identification information comprises a user file code of the user equipment; or
The identification information comprises a target public land mobile network identity identification code and the user equipment identity identification code corresponding to the target base station.
Preferably, the core network issues the identification information through an initial context establishment request message; or
The core network issues the identification information through a private signaling.
The invention also constructs a source base station comprising a memory, a processor, wherein,
the memory to store program instructions;
the processor is configured to perform the following steps according to program instructions stored in the memory:
the access to the user equipment is carried out,
and receiving identification information for identifying the user equipment and the target base station, and switching the user equipment to access the target base station according to the identification information.
The method for realizing the inclined base station in the LTE system, the communication system and the source base station have the following beneficial effects that: the method for controlling the inclined base station switching of the user equipment by the system in the LTE system is provided, the protocol stack of the user equipment does not need to be modified, the chip of the user equipment does not need to be modified, and the dependence of the switching process on the user equipment is reduced.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a method for implementing an inclined base station in an LTE system of the present invention, when a user equipment is simultaneously covered by a source base station and a target base station, the user equipment detects that the signal strength of the source base station is greater than that of the target base station, the user equipment accesses from the source base station, and an inclined target PLMN of the user equipment is the target base station, the following steps are performed:
s1, the core network confirms that the user equipment is not accessed from the target base station;
s2, the core network sends identification information for identifying the user equipment and the target base station to the source base station;
and S3, the source base station receives the identification information and switches the user equipment to access the target base station according to the identification information.
Specifically, when a user equipment, such as a user terminal equipment, is located in an area covered by multiple base stations simultaneously, according to an LTE communication protocol, the user equipment in the same core network automatically selects a base station with a high signal strength for registration access according to the detected signal strength of the base station. In many cases, the base station with high signal strength is not the base station to which the terminal should access. For example: a police station and a fire station both use a base station system and a terminal of a certain business, and belong to different PLMNs respectively. The two networks cover an overlapping area and for ease of management and security reasons it is necessary to have police terminals access to base stations belonging to the police station and firefighters terminals access to base stations belonging to the fire station. When a police terminal is not accessed under the PLMN to which the police terminal belongs but is accessed under the PLMN of the fire department, the core network detects that the police terminal is not accessed under the PLMN of the police department, and informs the source base station in a specific mode, and then the source base station accesses the police terminal to a network under a proper base station under the PLMN of the police department. It can be understood that a specific manner is to send identification information for identifying the ue and the target base station to the source base station for the core network. And the source base station can switch the user terminal to the target base station for access according to the received identification information.
As shown in fig. 2, in a second embodiment of the method for implementing an inclined base station in an LTE system of the present invention, when a user equipment is simultaneously covered by a source base station and a target base station, the user equipment detects that the signal strength of the source base station is greater than that of the target base station, the user equipment accesses from the source base station, and an inclined PLMN of the user equipment is the target base station, the following steps are performed:
s10, the core network confirms that the user equipment is not accessed from the target base station;
s20, the core network and the source base station both save the mapping relation between the user equipment SPID (Subscriber Profile ID) and the target PLMN, the core network issues the SPID code of the user equipment to the source base station through the initial context establishment request message in the process that the user equipment is accessed to the source base station;
and S30, the source base station receives and switches the user equipment to access the target base station according to the SPID of the user equipment.
It can be understood that, by storing the mapping relationship between the SPIDs of the user equipment in the core network and the source base station and the target PLMN, in the process of accessing the user equipment from the source base station, the core network identifies the SPID of the user equipment, and identifies the target PLMN of the user equipment according to the mapping relationship. The core network issues the SPID to the source base station through the initial context establishment request information in the network establishment process, and the source base station confirms the target base station of the user equipment through the pre-stored mapping relation and switches the user equipment to access the base station under the target PLMN. Of course, in the process of accessing the source base station by the user equipment, the identification information is not limited to be sent in the above manner, and the identification information may also be other data or identification information with a special correspondence.
As shown in fig. 3, in a third embodiment of the method for implementing an inclined base station in an LTE system of the present invention, when a user equipment is simultaneously covered by a source base station and a target base station, the user equipment detects that the signal strength of the source base station is greater than that of the target base station, the user equipment accesses from the source base station, and an inclined PLMN of the user equipment is the target base station, the following steps are performed:
s10, the core network confirms that the user equipment is not accessed from the target base station;
s20, the core network sends the PLMN ID and the user equipment ID corresponding to the target base station to the source base station through a private signaling;
and S30, the source base station receives and switches the user equipment to access the target base station according to the PLMN ID and the user equipment ID.
It can be understood that when the user equipment has accessed to the source base station, the private signaling may be sent through the core network, where the private signaling may carry the target PLMN ID and the ID of the user equipment to the source base station to indicate the target PLMN of the user equipment, and after the source base station receives the core network indication, the user equipment is switched to access to the base station under the target PLMN.
Specifically, in the above embodiment, it is understood that, when the core network determines that the UE is not accessed from the target base station, the UE includes the UE ID by sending an initial UE message (including an attach request message), and meanwhile, the core network records a mapping relationship between each UE and the intended camping base station ID. The core network may discover when the user equipment is not camping on the intended base station. The UE judges in the access process, and the core network confirms that the user equipment is not accessed from the target base station. In addition, after receiving the identification information, the source base station adopts a switching or redirection mode based on measurement report to enable the user equipment to access the target base station. Specific reference may be made to the following examples.
As shown in fig. 4, in a fourth embodiment of the method for implementing an inclined base station in an LTE system of the present invention, when a user equipment is simultaneously covered by a source base station and a target base station, the user equipment detects that the signal strength of the source base station is greater than that of the target base station, the user equipment accesses from the source base station, and an inclined PLMN of the user equipment is the target base station, the following steps are performed:
s100, the core network confirms that the user equipment is not accessed from the target base station;
s200, a core network sends identification information for identifying user equipment and a target base station to a source base station;
s301, the source base station issues measurement configuration to the user equipment according to the identification information;
s302, the user equipment executes measurement and reports the measurement result to the source base station;
s303, the source base station sends a switching command to the user equipment according to the measurement result;
s304, the user equipment is switched to the target base station.
It can be appreciated that the priority of the trending base station is highest when switching decisions during the measurement process. Of course, the measurement result of the base station may be combined, and the handover may be performed after the determination is performed through the measurement.
As shown in fig. 5, in a fifth embodiment of the method for implementing an inclined base station in an LTE system of the present invention, when a user equipment is simultaneously covered by a source base station and a target base station, the user equipment detects that the signal strength of the source base station is greater than that of the target base station, the user equipment accesses from the source base station, and an inclined PLMN of the user equipment is the target base station, the following steps are performed:
s110, the core network confirms that the user equipment is not accessed from the target base station;
s210, the core network sends identification information for identifying the user equipment and the target base station to the source base station;
s311, the source base station sends a connection release message containing the wireless resource control of the frequency point of the target base station to the user equipment;
and S312, the user equipment is switched to the target base station.
It will be appreciated that the above approach is generally applicable to the case where the operating frequency bands of the source base station and the target base station are different.
Further, a communication system of the present invention includes: a core network, a target base station, a source base station and user equipment;
the core network is used for confirming that the user equipment is not accessed from the target base station and sending identification information for identifying the user equipment and the target base station to the source base station;
and the source base station is used for receiving the identification information and switching the user equipment to access the target base station according to the identification information.
Specifically, when the user equipment is simultaneously covered by the source base station and the target base station, the user equipment detects that the signal intensity of the source base station is greater than that of the target base station, the user equipment is accessed from the source base station, and the inclined PLMN of the user equipment is the target base station, the core network sends identification information for identifying the user terminal and the target base station to the source base station. And the source base station can switch the user terminal to the target base station for access according to the received identification information. The detailed procedures can be referred to as described above.
Further, in some embodiments, the core network is configured to send the identification information during the process of accessing the source base station by the user equipment; in still other embodiments, the core network is configured to send the identification information after the ue accesses the source base station.
Further, in some embodiments, the core network and the source base station both store a mapping relationship between the user file code and the target public land mobile network; the identification information contains a user file code of the user device. In other embodiments, the identification information includes a target plmn identity and the ue identity corresponding to the target base station.
Specifically, the SPID of the user equipment is identified by the core network in the process of accessing the user equipment from the source base station through the mapping relationship between the SPID of the user equipment stored in the core network and the source base station and the target PLMN of the user equipment, and the target PLMN of the user equipment is identified according to the mapping relationship. The core network issues the SPID to the source base station through the initial context establishment request information in the network establishment process, and the source base station confirms the target base station of the user equipment through the pre-stored mapping relation and switches the user equipment to access the base station under the target PLMN. Or when the user equipment has accessed the source base station, a private signaling can be sent through the core network, the private signaling can carry the ID of the target PLMN and the ID of the user equipment to the source base station to indicate the target PLMN of the user equipment, and the source base station enables the user equipment to switch and access the base station under the target PLMN after receiving the indication of the core network.
Further, in some embodiments, the core network issues the identification information through the initial context establishment request message; in other embodiments, the core network issues the identification information via a private signaling. Specifically, the process of sending the identification information by the core network may refer to the above description.
In addition, the source base station of the invention comprises a memory and a processor, wherein,
a memory for storing program instructions;
a processor for performing the following steps according to program instructions stored in the memory:
the access to the user equipment is carried out,
and receiving identification information for identifying the user equipment and the target base station, and switching the user equipment to access the target base station according to the identification information.
In particular, implementations may be referred to as described above. The base station here may be an LTE base station.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.